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The trait shown in the given pedigree chart is most likely a/an:

1. Autosomal recessive trait
2. Autosomal dominant trait
3. Sex linked recessive trait
4. Sex linked dominant trait

The type of population interaction exhibited by visiting flamingos and resident fishes in South American Lakes, is also shown by
1. Sparrow eating any seed.
2. Cuckoo and crow.
3. Abingdon tortoise and goats in Galapagos island.
4. Sea anemone and clown fish.

The phytohormone that speed up the malting process in brewing industry is also responsible for
 

1. a and c 
2. b and d
3. d and f 
4. e and f

In Pteridophytes reduction division occurs
during
1. spore formation
2. gamete formation
3. sporophyte formation
4. gametophyte germination

Consider the following four statements A, B, C and D and select the right option for two correct statements.
(A) In vexillary aestivation, the large posterior petal is called standard, two lateral ones
are wings and two small anterior petals are termed keel
(B) The floral formula for Liliaceae is 
(C) In pea flower the stamens are monadelphous
(D) The floral formula for Solanaceae is 
The correct statements are
1. (A) and (C)
2. (A) and (B)
3. (B) and (C)
4. (C) and (D)

Placentations given below in the diagrams are

1. a - Basal, b- Axile, c- Free central, d - Parietal
2. a - Marginal, b- Axile, c- Basal, d - Superfecial
3. a - Marginal, b- Free central, c- Basal, d - Axile
4. a - Marginal, b- Axile, c- Parietal, d - Free central

Which of the following is a disease caused by
prion?
1. Kala-azar
2. Parkinson’s disease
3. Creutzfeldt-Jacob disease
4. Gas gangrene

A free living aerobic soil bacterium capable of
fixing nitrogen is
1. Azotobacter
2. Clostridium
3. Rhizobium
4. Streptococcus

In a longitudinal section of a root, starting from
the tip upward, the four zones occur in the
following order
1. Cell division, cell maturation, cell enlargement,
root cap
2. Root cap, cell division, cell maturation, cell
enlargement
3. Root cap, cell division, cell enlargement, cell
maturation
4. Cell division, cell enlargement, cell maturation,
root cap

As a contraception method, term sterilisation is used
for
1. Removal of testis
2. Vasectomy
3. Tubectomy
4. Both (2) and (3)

Given below is the diagram of a typical structure of dicotyledonous seeds. In which one of the options all the five parts A, B, C, D and E correct?

1. A – Hilum, B – Micropyle, C – Radicle, D – Cotyledon, E – Plumule
2. A – Hilum, B – Micropyle, C – Plumule, D – Cotyledon, E – Radicle
3. A – Micropyle, B – Hilum, C – Plumule, D – Cotyledon, E – Radicle
4. A – Hilum, B – Micropyle, C – Plumule, D – Radicle, E - Cotyledon

Which of the following statements about classification is not true?
I. Members of a family are less similar than members of an included genus.
II. An order has more members than the number of members in an included genus.
III. Families have more members than phyla.
IV. The number of species in a taxon depends on their relative degree of similarity.
1. Only III
2. Only IV
3. Only II
4. Only I

Consider the following statements (A – D) about organic farming:
(i) Utilizes genetically modified crops like Bt cotton.
(ii) Uses only naturally produced inputs like compost.
(iii) Does not use pesticides and urea.
(iv) Produces vegetables rich in vitamins and minerals.
Which of the above statements are correct?
1. (ii), (iii) and (iv)
2. (iii) and (iv) only
3. (ii) and (iii) only
4. (i) and (ii) only.

Identify the incorrect statement regarding the blood vascular system of cockroach:

Adipose tissue and areolar tissue are considered as:
1. Loose connective tissue and dense connective tissue respectively.
2. Dense regular and dense irregular tissue respectively.
3. Both are specialised connective tissue.
4. Both are loose connective tissue.

Mucus neck cell is a part of
1. Gastric gland.
2. Intestinal gland.
3. Salivary gland.
4. Both 1 and 2

Mark the incorrect match:

Vestibular apparatus is composed of:
I. Semi-circular canals
II. Otolith organs
III. Organ of Corti
IV. Crista and macula
1. I, II, III & IV 
2. I, II only
3. IV only 
4. II only

‘Retinal’ is present in
1. Rods.
2. Cones.
3. Both 1 and 2.
4. All the retinal layer

___A___ and ___B___ provide micro-environments for
the development and maturation of T-lymphocytes. Here
A and B is :-
1. Spleen and thymus gland.
2. Thymus gland and MALT.
3. Bone marrow and thymus gland.
4. Spleen and MALT.

Vaccines are available for the disease like
I. Polio.
II. Diptheria.
III. Pneumonia.
IV. Tetanus.
1. I, II, III & IV 
2. I and IV only
3. I only 
4. I, II & IV only

Fertilization membrane is formed to
1. Faciliate entry of sperm into egg.
2. Provide stability to egg.
3. Prevent ectopic pregnancy.
4. Prevent polyspermy

Seminal plasma of humans is rich in
1. Fructose and certain enzymes, poor in Ca²⁺.
2. Fructose, Ca²⁺ and certain enzymes.
3. Fructose, Ca²⁺ but no enzymes.
4. Glucose, certain enzymes but no Ca²⁺

Which one of the following is not the function of
placenta?
1. Faciliates removal of carbon dioxide and waste
material from embryo.
2. Secrete oxytocin during parturition.
3. Faciliates supply of oxygen and nutrients to embryo.
4. Secretes estrogen.

Read the following statements carefully
A. Lipid component of the plasma membrane mainly consists of phosphoglycerides.
B. Polar molecules can pass through the lipid bilayer of plasma membrane, therefore they do not require carrier proteins to facilitate their transport.
C. Secondary wall is capable of growth and it is formed on the outer side of the cell
D. Quasi fluid nature of lipid enables lateral movement of proteins within the overall lipid bilayer of plasma membrane
E. Middle lamella glues the different neighbouring cells together
How many statements are incorrect?
1. Three
2. Five
3. Four
4. Two

Which of the following are the functions of deoxyribonucleoside triphosphates?
i. Act as substrates
ii. Provide energy for polymerization reaction
iii. Act as enzyme
iv. To separate strands of DNA
1. i, ii, iii
2. ii, iv
3. i, ii
4. i, iii

The structural and catalytic role during translation is brought about by
1. mRNA
2. tRNA
3. rRNA
4. Both 1 and 3

The cell in the pollen grain which is responsible for giving rise to male gamete is
1. Rod shaped with dense cytoplasm
2. Of smaller size and float in the cytoplasm
3. Capable of dividing meiotically and give rise two male gamete
4. It has abundant food reserve and large irregularly shaped nucleus.

During the formation of embryo sac
1. The mitotic divisions are strictly cellular.
2. Three cells present at the micropylar end are called antipodals.
3. Six of the 8 nuclei are surrounded by cell wall.
4. There is development of special thickening called filiform apparatus at chalazal end.

The meristem that occurs in mature regions of roots and shoots of dicots and appears later than primary meristem is formed at the result of _____ from _____ tissue

Crossing over occurs just prior to
1. Pachytene
2. Diplotene
3. Diakinesis
4. Zygotene

In the figure below identify the remain of second cotyledon

1. Scutellum
2. Coleoptile
3. Epiblast
4. Coleorhiza

Select incorrect statement for the lac operon
1. Here Lac refers to lactose
2. The i-gene is non-constitutive gene, synthesizing repressor protein
3. The y-gene codes for permease
4. The repressor protein binds to the operator region and prevents RNA polymerase activity

In nature, a given habitat has enough resources to support a maximum possible number, beyond which no further growth is possible. The limit is known as
1. Environmental resistance
2. Intrinsic rate of natural increase
3. Carrying capacity
4. Exponentially growth

The organelles formed by the process of packaging in the golgi apparatus is
1. Double membrane organelle.
2. Possess single circular DNA molecule
3. Rich in hydrolases
4. Able to occupy up to 90 percent volume of the cell

The blood from a person with an AB blood type
1. Would agglutinate with anti-A antibodies only.
2. Would agglutinate with anti-B antibodies only.
3. Would agglutinate with both anti-A and anti-B
antibodies.
4. Would not agglutinate with either anti-A of anti-B
antibodies.

Which of the following is very close to the time of
ovulation?
1. Peak of progesterone.
2. Minimum level of estrogen.
3. Peak of LH and FSH.
4. Thickest layer of endometrium.

How is the digestion and absorption of fats different from that of proteins and carbohydrates?
1. Fat digestion occurs in the small intestine, and
the digestion of proteins and carbohydrates occurs
in stomach.
2. Fats are absorbed into the cells as fatty acids and
monoglycerides but are then modified for
absorption into the blood through lacteals; amino
acids and glucose are not modified further.
3. Fats enter hepatic portal circulation, but proteins
and carbohydrates enter the lymphatic system.
4. Fats are absorbed in the large intestine and protein
and carbohydrates are absorbed in the small intestine.

Arrange the following component in the sequence of activation of  blood clotting mechanism?

1. (i), (ii), (iii), (iv), (v)
2. (i), (iv), (v), (ii), (iii)
3. (iii), (iv), (v), (i), (ii)
4. (v), (iv), (iii), (ii), (i)

In the accompanying diagram of a human nephron the functional parts are labelled as A, B, C, D, E.

Study the diagram to answer the questions given

Choose the correct option:

Which of the following is not a direct method of gene transfer?
1. Microinjection
2. Biolistic
3. Electroporation
4. Disarmed pathogen vector

The process of evolution of different species in a given
geographical area starting from a point and literally
radiating to other areas of geography is called
1. Divergent evolution.
2. Adaptive radiation.
3. Adaptive convergence.
4. Parallel evolution.

All the following are present in sponges, except
1. Spicules
2. Choanocytes
3. A digestive tract
4. Sexual and / or asexual reproduction

False statement is

In G${}_2$ phase of cell cycle
1. RNA synthesis stops.
2. DNA replicates.
3. Deoxyribonucleotide synthesis begins.
4. Tubulin protein synthesis takes place.

The interconnected cells which do not show symplastic movement of water are:
1. Mesophyll cells
2. Tracheids
3. Xylem parenchyma cells
4. Cells of endodermis

In most terrestrial plants stomata normally open in the daytime. The immediate cause of the opening of the stomata is:
1. Circular orientation of cellulose microfibrils in the guard cells.
2. Loss of water from guard cells.
3. An increase in CO${}_2$ concentration in the sub-stomatal cavity.
4. An increase in the turgidity of the guard cells.

Select the Incorrect statement from the following.

Match the following columns and select the correct option.

Read the following statements and choose the option which is true for them.

1. Only statement I is correct.
2. Only statement II is correct.
3. Both the statements I and II are correct.
4. Both the statements I and II are incorrect.

When tripalmitin is used as substrate in respiration, the value of RQ is found to be less than one because

In a flowering plant if auxins are not synthesizing, then effects which would most probably be seen in this plant are

1. i, ii and iv
2. i, iii and iv
3. ii and iv only
4. i and iii only

Leaves of which of the following plants are involved in vegetative reproduction?
1. Opuntia
2. Potato
3. Bryophyllum
4. Sugarcane

Total sum of possible genotypes and phenotypes of
blood type amongst the children of a couple having
genotypes ${\mathrm{I}}^{\mathrm{A}} {\mathrm{I}}^{\mathrm{O}}$ and ${\mathrm{I}}^{\mathrm{B}} {\mathrm{I}}^{\mathrm{O}}$ can be
1. 8
2. 6
3. 7
4. 5

An individual affected with Turner's syndrome
1. Lacks X - chromosomes.
2. Has an additional copy of X- chromosome.
3. Is monosomic due to the presence of only one X - chromosome.
4. Has trisomic condition of an autosome.

By performing a series of experiments that showed the effect of R and S strains of Streptococcus pneumoniae on mice, Griffith concluded that
1. Protein digesting enzyme does not affect
      transformation.
2. DNA is more stable genetic material than RNA.
3. DNA replication is semi conservative.
4. Non-virulent bacteria were tranformed by heat killed
     virulent bacteria.

Match the following columns and select the correct
option

1. a (ii), b (iv), c (i), d (iii)
2. a (iii), b (i), c (iv), d (ii)
3. a (iii), b (iv), c (i), d (ii)
4. a (ii), b (i), c (iv), d (iii)

Which of the following is an example of branched
polymer?
1. Chitin.
2. Cellulose.
3. Amylose.
4. Glycogen

Mark the correct match with the group and its characteristic?

Urinary excretion is equivalent to:
GF = Glomerular filtration.
TR = Tubular reabsorption.
TS = Tubular secretion.
1. GF + TR + TS 
2. GF – (TR + TS)
3. GF – TR + TS 
4. GF – TS + TR

Biologists discover about 1000 species in an Island
which is descended from a single ancestor species.
What is the reason behind the such large speciation?
1. Mutation
2. Adaptive radiation
3. Convergent evolution.
4. Reproductive isolation

If the gene of interest is cloned at ECoRI in pBR322,
the recombinant E-coli after transformation are

1. Susceptible to ampicillin and tetracyline.
2. Sensitive to tetracycline.
3. Resistant to kanamycin.
4. Resistant to ampicillin and tetracycline

In biotechnology transgenic animals are used for

1. I, II, III and IV 
2. III and IV only
3. I, III and IV 
4. I and II only

From RNA interference technique
1. Toxins are made to kill soil parasites.
2. Made crops more tolerant to abiotic stresses.
3. Plants are made resistant to soil parasites.
4. Plants are developed to get the enhanced nutritional
value of food

Gene for starch synthesis in pea can show variable behaviour with respect to phenotype produced, it can show
1. Mendelian dominance
2. Multiple allelism
3. Incomplete dominance
4. More than one option is correct

Find odd one out with respect to autosomal recessive disorders
1. Cystic fibrosis
2. Myotonic dystrophy
3. Phenylketonuria
4. Sickle-cell anaemia

Verhulst-Pearl logistic growth
(a) Occurs when resources are unlimited
(b) Is expressed as $\frac{dN}{dt}=rN\left(\frac{K-N}{K}\right)$
(c) Exhibits sigmoid curve
(d) Is characterized by the function of carrying capacity
1. All are correct
2. Only (a) & (b) are correct
3. Only (a) is incorrect
4. Only (b) & (c) are incorrect

Find the correct match
1. Montreal Protocol – 1992
2. Kyoto Protocol – 1997
3. Earth Summit – South Africa
4. World Summit – Brazil

A peptide hormone which causes dilation of blood vessels and decreases blood pressure is
1. Aldosterone
2. Adrenaline
3. Vasopressin
4. Atrial Natriuretic factor

The maximum volume of air a person can breathe in after a forced expiration is

1. (A) only
2. (A) & (B) only
3. (A), (B) & (C) only
4. (A), (B), (C) & (D)

Match the column and choose the correct answer.
Column-I                       Column-II
a. Hypothalamus          (i) Sperm lysin
b. Acrosome                (ii) Estrogen
c. Graffian follicle         (iii) Relaxin
d. Leydig cells             (iv) GnRH
e. Parturition               (v) Testosterone
1. a(iv), b(i), c(ii), d(iii), e(v)
2. a(ii), b(i), c(iv), d(iii), e(v)
3. a(ii), b(i), c(v), d(iv), e(iii)
4. a(iv), b(i), c(ii), d(v), e(iii)

Which of the following respiratory centre does not play role in basic respiratory rhythms but under enhanced respiratory drive, the respiratory signals of this centre fulfil the demand by regulating both inspiration and expiration?
1. Pneumotaxic centre
2. Apneustic centre
3. Dorsal respiratory group
4. Ventral respiratory group

The option incorrect for water hyacinth is
1. Introduced in India because of its beautiful flowers
    and shape of leaves.
2. Drains oxygen from water, which leads to death of
    fishes.
3. Found growing wherever there is running water.
4. Grow faster than our ability to remove them.

Which of the following option is not true for penicillin?

Monascus purpureus is a
i. Bacteria                           
ii. Yeast
iii. Produces cyclosporin A     
iv. Produces statins
1. i, iii
2. ii, iii
3. i, iv
4. ii, iv

The tiger census in our national parks and tiger
reserves is often based on
1. Pugmarks
2. Fecal pellets
3. Fallen teeth
4. Both 1 and 2

Decomposition is controlled by several factors. Find
out the incorrect option with respect to it .
1. Slower if detritus is rich in lignin and chitin.
2. Quicker if detritus is rich in nitrogen .
3. Cool and moist environment favour decomposition
4. Low temperature and anaerobiosis inhibit
decomposition

Following is the figure of actin (thin) filaments, Identify
A, B and C

1. A-Tropomyosin, B-Troponin, C-F-actin
2. A-Troponin, B-Myosin, C-Tropomyosin
3. A-Troponin, B-Tropokyosin, C-Myosin
4. A-Troponin, B-Tropomyosin, C-F-actin

A motor unit is best described as-
1. All the nerve fibres and muscle fibres in a single
muscle bundle
2. One muscle fibre and its single nerve fibre
3. A single motor neuron and all the muscle fibres
that it innervates
4. It is the neuron which carries the message from
muscle to CNS

Continued inbreeding, especially close inbreeding
usually reduce fertility and even productivity called
inbreeding depression. This can be overcome by
1. Cross breeding
2. Outcross
3. Interspecific hybridization
4. Continued inbreeding

Which one of the following glands is correctly matched with the accompanying description?
1. Thyroid $\to$ Hyperactivity in children causes cretinism
2. Thymus $\to$ Starts undergoing atrophy after puberty
3. Parathyroid$\to$ Secretes parathormone which promotes the movement of calcium ions from blood to bones during calcification
4. Pancreas $\to$ Alpha cells of islet of Langerhans secrete a hormone that stimulates glycogenesis

In the given diagram of the nucleosome, the region marked as ‘x’ is rich in.

1. Glutamine. 
2. Lysine. 
3. Tryptophan. 
4. Tyrosine.

Marsupial mole and kangaroo are examples of
1. Divergent evolution 
2. Convergent evolution 
3. Adaptive Radiation 
4. Both 1 and 3
 

Study the given table regarding vertebrates and identified A, B, C and D

Bryophytes are:-
1.  Always homosporic and exhibit exospheric development of spores
2.  Mostly sporophytic plants
3.  Most successful terrestrial plants
4.  Gametophytic with branched multicellular roots

How many of the following statements are not true for kingdom Monera ?
(i) Most of the members are prokaryotic 
(ii) Some of the monerans can perform photosynthesis
(iii) All the members have cell wall of peptidoglycan 
(iv) All the members of monera are devoid of true nucleus 
(v) All the members are pathogenic
1. One
2. Two
3. Three
4. Four 

Concentration of DDT for first trophic level and fourth trophic level is respectively in aquatic food chains
1.  0.04 ppb, 25 ppm
2.  0.003 ppb, 2 ppm
3.  0.5 ppb, 2 ppm
4.  0.04 ppm, 25 ppm

Cleaning of wastewater in Arcata Marsh involves
1.  Only conventional method of sewage treatment
2.  Removal of dissolved heavy metals through a biological process
3.  Filteration, chlorination like chemical processes
4.  Utilisation of microorganisms only for pollution control 

Eco-san toilets are not associated with which of the following?
1.  Are working in Sri Lanka and Kerala
2.  Composting method for recycling of human excreta
3.  Recycled material forms natural fertilizer
4.  Enhance the need for chemical fertilizers 

Choose the correct sequence of greenhouse gases with respect to their relative contribution to global warming in increasing order
1.  ${\mathrm{N}}_2\mathrm{O}, \mathrm{CFC}, {\mathrm{CH}}_4, {\mathrm{CO}}_2$
2.  $\mathrm{CFC}, {\mathrm{N}}_2\mathrm{O}, {\mathrm{CO}}_2, {\mathrm{CH}}_4$
3.  ${\mathrm{CH}}_4, {\mathrm{N}}_2\mathrm{O}, {\mathrm{CO}}_2, \mathrm{CFC}$
4.  ${\mathrm{N}}_2\mathrm{O}, {\mathrm{CO}}_2, {\mathrm{CH}}_4, \mathrm{CFC}$

The Lassaigne's extract is boiled with a concentration HNO₃ while testing for halogens. By doing so it:
1. Helps in the precipitation of AgCl.
2. Increases the solubility product of AgCl.
3. Increases the concentration of NO₃^- ions.
4. Decomposes Na₂S and NaCN, if formed.

A compound forms hcp structure. The total number of voids in 0.5 mol will be- 
1. 9.033$\times$10²³
2. 6.011$\times$10²³
3. 5.023$\times$10²³
4. 7.033$\times$10²³

At room temperature, the average speed of Helium is higher than that of Oxygen by a factor of -
1. $2\sqrt{2}$
2. $6/\sqrt{2}$
3. 8
4. 6

What volume of ammonia gas at NTP will be required to be passed into 30 mL of 1 $\mathrm{N} {\mathrm{H}}_2{\mathrm{SO}}_4$ to bring down the acid normality to 0.2 N?
1.  480.5 mL
2.  537.6 mL
3.   438.4 mL
4.  556.5 mL

In animals, the stored carbohydrate is:
1.  Starch
2.  Glycogen
3.  Sucrose
4.  Fructose

A 500 g toothpaste sample has 0.4 g fluoride concentration. The fluoride concentration in terms of ppm will be -

The number of d-electrons in ${\mathrm{Fe}}^{2+}$ is not equal to
that of the
1.   p-electrons in Ne
2.   s-electrons in Mg
3.  d-electrons in Co⁺³
4.   p-electrons in ${\mathrm{Cl}}^{{}^{\mathrm{\_}}}$

The hybridizations of [Ni(CO)₄] and [Cr(H₂O)₆]³⁺, respectively, are : 
1. sp³ and d³sp²
2. dsp² and d²sp³
3. sp³ and d²sp³
4. dsp²  and sp³d²

Metallic copper dissolves in     
1. Dilute HCl
2. Concentrated HCl+conc. HNO₃
3. Aqueous KCN
4. Pure ammonia

${\mathrm{HClO}}_4 + {\mathrm{P}}_2{\mathrm{O}}_5 \to \left(\mathrm{A}\right) + \left(\mathrm{B}\right)$ 
(B) and (A) are respectively
1.  ${\mathrm{HPO}}_3, {\mathrm{Cl}}_2{\mathrm{O}}_6$
2.  ${\mathrm{H}}_3{\mathrm{PO}}_4, {\mathrm{HClO}}_3$
3.  ${\mathrm{HPO}}_3, {\mathrm{Cl}}_2{\mathrm{O}}_7$
4.  ${\mathrm{ClO}}_2, {\mathrm{H}}_3\mathrm{PO}$

 $\stackrel{\mathrm{NaOH}}{\to }$ Major product.
Major product is
1.             2.
3.               4.

Which one of the following has maximum nucleophilicity?
1.  ${\mathrm{CH}}_3{\mathrm{S}}^{\oplus }$
2.  ${\mathrm{C}}_6{\mathrm{H}}_5 - \stackrel{\oplus }{\mathrm{O}}$
3.  ${\mathrm{Et}}_3\mathrm{N}$
4.  ${\mathrm{F}}^{\oplus }$

The total number of 3rd period elements with more than one electron in a 3d orbital is:

Percentage ionic character, if electronegativity value of X=2.1 & Y=3.0, is :-

lf kinetic energy of an electron in second shell of H-atom is 40 eV then what will be the total energy of electron in its third shell ?
1. $-$4.44 eV
2. $-$1.11 eV
3. $-$8.88 eV
4. $-$ 17.78 eV

lf 0.50 L of a 0.60 M SnS$O_4$ solution is electrolyzed for a period of 30 min using a current of 4.60 A. lf inert electrodes are used then what is the final concentration of S${n_2}^{+}$ remaining in the solution ?[atomic wt. of Sn =119]
1. 0.342 M
2. 0.6 M
3. 0.389 M 
4. 0.514 M 

17.4 % (w/v) ${\mathrm{K}}_2{\mathrm{SO}}_4$ solution at 27 $°$C is isotonic to 5.85 % (w/V) NaCl solution at 27 $°$C. lf NaCl is 100 % ionised, the % ionisation of ${\mathrm{K}}_2{\mathrm{SO}}_4$ in aqueous solution is-
[At wt. of K = 39, Na = 23] :-
1. 25 %
2. 75 %
3. 50 %
4. None of the above

The electrode potential of Cu electrode dipped in 0.025 M CuSO₄ solution at 298 K is:
(standard reduction potential of Cu = 0.34 V)
1. 0.047 V
2. 0.293 V
3. 0.35 V
4. 0.387 V

Which of the following pair of species don't give $H_2{O}_2$ on hydrolysis :
1. H${}_2{S}_2{O}_8 and H_{2}S{O}_5$
2. $H_{3}P{O}_5 and H_{2}S{O}_5$
3. $H_4{P}_2{O}_{8 }and H_2{S}_2{O}_8$
4. $HCl{O}_4 and H_{3}P{O}_2$

In the process of extraction of silver,
silver ore + ${\mathrm{CN}}^{-}+$ ${\mathrm{H}}_2\mathrm{O}\stackrel{{\mathrm{O}}_2}{\to }$ $$ $$ $$ $$ $$ $\left[\mathrm{X}\right]$ $+$ ${\mathrm{OH}}_{}^{-}$
[X] + Zn $\to$ $$[Y] + Ag
[X], and [Y] in the above mentioned reaction are:
1. X= [Ag(CN)${}_2$]^$-$; Y = [Zn(CN)${}_4$]^-2
2. X= [Ag(CN)${}_2$]^-3; Y=[Zn(CN)${}_4$]^-2
3. X= [Ag(CN)${}_2$]^$-$; Y=[Zn(CN)${}_6$]^$-$
4. X=[Ag(CN)${}_4$]^$-$ ; Y= [Zn(CN)${}_4$]^$-$2 

For a reaction:-
${6\mathrm{H}}^{+}+ 5{\mathrm{Br}}^{-}+ \mathrm{Br}{\mathrm{O}}_3^{-}\to 3{\mathrm{Br}}_2+ 6{\mathrm{H}}_2\mathrm{O}$
lf rate of consumption of BrO${{}_3}^{-}$ is x mol ${\mathrm{L}}^{-1}{\mathrm{s}}^{-1}$. Then calculate the rate of formation of Br${}_2$:-
1. $\frac{x}{3}$
2. $\frac{2x}{3}$
3. $\frac{x}{4}$
4. 3x

ln a closed vessel, 50 ml of $A_2{B}_3$ completely reacts with 200 ml of C₂ according to the following equation:
$2A_2{B}_3\left(g\right) + 5C_2\left(g\right)\to 3C_3{B}_2\left(g\right)+C{A}_4\left(g\right)$
What will be the composition of the gaseous mixture in the system?
1. 100 ml $C_2, 50 ml C_3{B}_2,50 ml C{A}_4$
2. 25 ml $C_2, 75 ml C_3{B}_{\mathrm{2,}} 25 ml C{A}_4$
3. 75 ml $C_2, 75 ml C_3{B}_{2, }25 ml C{A}_4$
4. 10 ml $C_2, 25 ml C_3{B}_{2, }100 ml C{A}_4$

AB₃ (g) dissociates as  AB₃(g) ⇌ AB₂(g) + \(\frac{1}{2}\) B₂(g) .When the initial pressure of AB₃ is 800 torr and the total pressure developed at equilibrium is 900 torr. What fraction of AB₃(g) gets dissociated?
1. 10%
2. 12.5%
3. 25%
4. 30%

The concentration of $\left[{\mathrm{H}}^{+}\right]$ ion in a solution containing 0.1 M HCN and 0.2 M NaCN will be:
(${\mathrm{K}}_{\mathrm{a}}$ for HCN = $6.2\times {10}^{-10}$)
1. 3.1$\times {10}^{10}$
2. $6.2\times {10}^5$
3.$$ $6.2\times {10}^{-10}$
4. $3.1\times {10}^{-10}$

The difference in $∆H$ $and$ $∆U$ for combustion of benzoic acid at 300 K is equal to-
1. -1.247 kJ
2. +1.247 kJ
3. -1.247 J
4. +1.247 J

Which of the following compounds will exhibit the lowest heat of hydrogenation?

1.		2.
3.		4.

Match the polymers given in Column-I with their repeating units given in Column-II. Choose the correct option from the codes given below :

Column-I	Column-II
(a) Polystyrene	(p)
(b) Novolac	(q)
(c) Buna-N	(r)
(d) Acrilan	(s)

Select the structure of chromium complex formed. When the toluene reacts with chromyl chloride to give benzaldehyde on hydrolysis :
1. 
2. 
3. 
4. 

The compound 'A' having molecular formula ${\mathrm{C}}_3{\mathrm{H}}_9\mathrm{N}$ undergoes following reaction

The compound 'A' will be :-
1. CH₃-CH₂-CH₂-NH₂
2.  CH₃-CH₂-NH-CH₃
3. ${\mathrm{CH}}_3-\stackrel{\stackrel{{\mathrm{NH}}_2}{|}}{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_3$
4. ${\mathrm{CH}}_3-\underset{\underset{{\mathrm{CH}}_3}{|}}{\mathrm{N}}-{\mathrm{CH}}_3$

Among the following the aromatic compound is :-

The incorrect statement among the following is : 
1. The atomic radius of Na is greater than that of Mg.
2. Density of K is more than Na.
3. Melting point & boiling point of Ca are greater than those of Mg.
4. Mg does not react with cold water.

The reaction, among the following, that cannot produce ethane is:
1. $C{H}_3-Cl \underset{dry ether}{\overset{Na}{\to }}$
2. $C{H}_3-COOH \underset{lime}{\overset{Soda}{\to }}$
3. $C{H}_3-COOK \underset{}{\overset{electrolysis}{\to }}$
4. $C{H}_3-C{H}_2-O-C{H}_2-C{H}_3\underset{HI}{\overset{Red P}{\to }}$

When 4 g of iron is burnt to ferric oxide at a constant pressure, 29.28 kJ of heat is evolved.
The enthalpy of formation of ferric oxide will be-
(At. mass of Fe = 56) ?
1. $-$81.98 kJ
2. $-$ 819.8 kJ
3. $-$ 40.99 kJ
4.  +819.8 kJ

Compound (A) is :
1.  $Ph-C{H}_2-CH=CH-C{H}_{2}Br$ 
2. $\mathrm{Br}$
$|$
$\mathrm{Ph}-\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$
3. $\mathrm{Ph}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{CH}-{\mathrm{CH}}_3$
$|$
$\mathrm{Br}$
4. $\mathrm{Ph}-{\mathrm{CH}}_2-\mathrm{CH}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$
$|$
$\mathrm{Br}$

Complex : Charge of Co is-
1.  +2
2.  +3
3.  +1
4.  +4

Brownian motion of colloidal particles is caused by:

A Brine solution on electrolysis will not give : 
1.  NaOH
2.  ${\mathrm{Cl}}_2$
3.  ${\mathrm{H}}_2$
4.  ${\mathrm{O}}_2$

The configuration that shows the outer transition element among the following is:
1. [Rn]7s²
2. [Xe]4f⁷5d¹6s²
3. [Xe]5d¹6s²
4. [Rn]5f⁷6d¹7s²

Given the reaction between 3 gases represented X${}_2$, Y${}_2$, Z${}_2$ to give the compound XYZ(g) ${\mathrm{X}}_{2\left(\mathrm{g}\right)}+ {\mathrm{Y}}_{2\left(\mathrm{g}\right)}+ {\mathrm{Z}}_{2\left(\mathrm{g}\right)} \rightleftharpoons 2{\mathrm{XYZ}}_{\left(\mathrm{g}\right)}$. At equilibrium concentration of X${}_2$ = 3M, Y${}_2$ = 6M, Z${}_2$= 9M XYZ = 6M
If the reaction takes place in a sealed vessel at 527°C, then the value of K_C
will be :
$1. \frac{27}{2}$
$2. \frac{2}{9}$
$3. 36$
$4. 24$

For HCl solution at $25°\mathrm{C}$, equivalent conductance at infinite dilution, is $425 {\mathrm{ohm}}^{-1} {\mathrm{cm}}^2 {\mathrm{equiv}}^{-1}$. The specific conductance of a solution of HCl is $0.3825 {\mathrm{ohm}}^{-1} {\mathrm{cm}}^{-1}$. If the apparent degree of dissociation is 90% the normality of the solution is:-
1. 0.90 N
2. 1.0 N
3. 10 N
4. 1.2 N

Which of the following species can act as an oxidising agent?
1. $\left[\mathrm{Cr}{\left(\mathrm{CO}\right)}_6\right]$
2. $\left[\mathrm{Ni}{\left(\mathrm{CO}\right)}_4\right]$
3. $[\mathrm{Mn}{\left(\mathrm{CO}\right)}_6{]}^{+}$
4. $\left[\mathrm{V}{\left(\mathrm{CO}\right)}_6\right]$

Which types of isomerism can be exhibited by compounds with the molecular formula C_4​H_1​1N?
1. Position isomerism
2. Metamerism
3. Functional isomerism
4. All of the above

Which of the following is most basic?
1. Lu${\left(\mathrm{OH}\right)}_3$
2. Yb${\left(\mathrm{OH}\right)}_3$
3. Ce${\left(\mathrm{OH}\right)}_3$
4. Tb${\left(\mathrm{OH}\right)}_3$

${\mathrm{B}}_2{\mathrm{H}}_6$ can't be prepared by -
1. ${\mathrm{NaBH}}_4$ $$ $+$ ${\mathrm{I}}_2$ $\to$
2. ${\mathrm{BF}}_3$ $$ $+$ $\mathrm{NaH}$ $\to$
3. ${\mathrm{B}}_3{\mathrm{N}}_3{\mathrm{H}}_6$ $$ $+$ ${\mathrm{H}}_2\mathrm{O}$ $\to$
4. ${\mathrm{Mg}}_3{\mathrm{B}}_2$ $+$ $\mathrm{dil}$ $\mathrm{HCl}\to$

A charge \(q_1=5 \times 10^{-8} ~\text{C}\) is kept at \(3\) cm from a charge \(q_2=-2 \times 10^{-8} ~\text{C}\). The potential energy of the system relative to the potential energy at infinite separation is:

In a region an electric field $E = 15 N{C}^{–1}$ making an angle 30$°$ with the horizontal plane is present. A ball having charge 2 C and mass 3 kg is projected with speed 20 m/s at an angle 30$°$ with the horizontal, the horizontal range of the projectile in metre is:- $(g = 10 m{s}^{–2})$
 
                       
1.  40
2.  $20\sqrt{3}$
3.  $40\sqrt{3}$
4.  $80\sqrt{3}$

A conducting sphere with a charge Q is surrounded by an uncharged concentric conducting spherical shell. The potential difference between the sphere and the shell is V. If the shell is now given a charge of –3Q, the new potential difference between them is:-
1. V
2. 2V
3. 4V
4. –2V

Suppose you are riding a bike with a speed of \(20~\text{m/s}\) due east relative to a person \(A\) who is walking on the ground towards the east. If your friend \(B\) walking on the ground due west measures your speed as \(30~\text{m/s}\) due east, then the relative velocity between two reference frames \(A\) and \(B\) is:

The position vector of a moving particle at time t is $\overrightarrow{\mathrm{r}} = \mathrm{a}\hat{\mathrm{i}} + 4{\mathrm{t}}^2 \widehat{\mathrm{j} }- {\mathrm{t}}^{3 }\hat{\mathrm{k}}$. Its displacement during the time interval, t = 1 s to t = 3 s is :
1.  $\hat{\mathrm{i}} + \hat{\mathrm{j}}$
2.  $3\hat{\mathrm{i}} + 4\hat{\mathrm{j}}- \hat{\mathrm{k}}$
3.  $9\hat{\mathrm{i}} + 36\hat{\mathrm{j}}- 27\hat{\mathrm{k}}$
4.  $32\hat{\mathrm{j}}- 26\hat{\mathrm{k}}$

A \(100\) kg gun fires a ball of \(1\) kg horizontally from a cliff at a height of \(500\) m. It falls on the ground at a distance of \(400\) m from the bottom of the cliff. The recoil velocity of the gun is: (Take \(g=10\) m/s²)
1. \(0.2\) m/s
2. \(0.4\) m/s
3. \(0.6\) m/s
4. \(0.8\) m/s

The resistances of three parts of a circular loop are as shown in the figure. What will be the magnetic field at the centre of \(O\) 
(current enters at \(A\) and leaves at \(B\) and \(C\) as shown)?

At any place on earth, the horizontal component of the earth's magnetic field is $\sqrt{3}$ times the vertical component. The angle of dip at that place will be
1. 60°
2. 45°
3. 90°
4. 30°

A uniform disc of mass m and radius R is rolling down a rough inclined plane which makes an angle 30° with the horizontal. If the coefficients of static and kinetic friction are each equal to µ and the only forces acting are gravitational and frictional, then the magnitude of the frictional force acting on the disc is:-
1. (mg/3) upwards
2. (mg/3) downwards
3. (mg/6) upwards
4. (mg/6) downwards

A uniform tube is shown in the figure which is open at one end and closed at the other. To enclose a column of air inside the tube, a pellet of mercury is introduced. If the length of air column at 27°C is 18 cm, at what temperature its length will be 21.6 cm?
                                     
1. 87°C
2. 91°C
3. 85°C
4. 97°C

Carnot cycle (reversible) of a gas, represented by a pressure-volume curve is shown in the diagram. 
                                 
Consider the following statements:-
I. Area ABCD = Work done on the gas
II. Area ABCD = Net heat absorbed
III. Change in the internal energy in cycle = 0
Which of these is correct?
1. I only
2. II only
3. II and III
4. I, II and III

The figure shows a polytropic process for an ideal gas. The work done by the gas will be in process AB is
                                 
1.  $\frac{15}{2}{\mathrm{P}}_0{\mathrm{V}}_0$
2.  $\frac{14}{3}{\mathrm{P}}_0{\mathrm{V}}_0$
3.  $8{\mathrm{P}}_0{\mathrm{V}}_0$
4.  Insufficient information

If the same amount of heat is supplied to two spheres of the same material having the same radius (one is hollow and the other is solid), then:

The angular resolution of a 10 cm diameter telescope for the wavelength of 5000 Å is of the order:-
1.  ${10}^6 \mathrm{rad}$
2.  ${10}^{-2} \mathrm{rad}$
3.  ${10}^{-4} \mathrm{rad}$
4.  ${10}^{-6} \mathrm{rad}$

A light ray from the air is incident (as shown in the figure) at one end of glass fibre (refractive index \(\mu= 1.5\)) making an incidence angle of \(60^{\circ}\) on the lateral surface so that it undergoes a total internal reflection. How much time would it take to traverse the straight fibre of a length of \(1\) km?
   
1. \(3.33~\mu\text{s}\)
2. \(6.67~\mu\text{s}\)
3. \(5.77~\mu\text{s}\)
4. \(3.85~\mu\text{s}\)

The radius of a soap bubble is increased from 1/$\sqrt{\mathrm{\pi }}$ cm to 2/$\sqrt{\mathrm{\pi }}$ cm. If the surface tension of the soap solution is 30 dynes per cm, then the work done will be:
1. 180 ergs
2. 360 ergs
3. 720 ergs
4. 960 ergs

The breaking stress of a wire going over a smooth pulley in the following question is \(2\times 10^{9}~\text{N/m}^2.\) What would be the minimum radius of the wire used if it is not to break?
    

The displacement-time graph of a particle executing SHM is shown in the figure. Its displacement equation is: (Time period = \(2~\text{s}\))
                           
1. \(x=10\sin \left(\pi t +\frac{\pi}{6}\right)\)
2. \(x=10\sin (\pi t )\)
3. \(x=10\cos (\pi t )\)
4. \(x=5\sin \left(\pi t +\frac{\pi}{6}\right)\)

Given the value of Rydberg constant is ${10}^7 {\mathrm{m}}^{-1}$, the wavenumber of the last line of the Balmer series in hydrogen spectrum will be:-
1.$0.25 \times {10}^4 {\mathrm{m}}^{-1}$
2. $0.5 \times {10}^4 {\mathrm{m}}^{-1}$
3. $0.25 \times {10}^7 {\mathrm{m}}^{-1}$
4. $2.5 \times {10}^7 {\mathrm{m}}^{-1}$

If $\left|\overrightarrow{\mathrm{A}} \times \overrightarrow{\mathrm{B}}\right| = \sqrt{3}\overrightarrow{\mathrm{A}}. \overrightarrow{\mathrm{B}}$, then the value of $\left|\overrightarrow{\mathrm{A}} + \overrightarrow{\mathrm{B}}\right|$ is:-
1.  ${\left({\mathrm{A}}^2 + {\mathrm{B}}^2 + \frac{\mathrm{AB}}{\sqrt{3}}\right)}^{1/2}$
2.  A + B
3.  ${\left({\mathrm{A}}^2 + {\mathrm{B}}^2 + \sqrt{3}\mathrm{AB}\right)}^{1/2}$
4.  ${\left({\mathrm{A}}^2 + {\mathrm{B}}^2 + \mathrm{AB}\right)}^{1/2}$

In an experiment, the height of an object measured by a vernier callipers having least count of \(0.01~\text{cm}\) is found to be \(5.72~\text{cm}\). When no object is there between jaws of this vernier callipers, the reading of the main scale is \(0.1\) cm and the reading of the vernier scale is \(0.3~\text{mm}\). The correct height of the object is:
1. \( 5.72 ~\text{cm} \)
2. \( 5.59~\text{cm} \)
3. \( 5.85~\text{cm} \)
4. \( 5.69~\text{cm} \)

When electric bulbs of the same power, but different marked voltage are connected in series across the power source, their brightness will be:-
1. Proportional to their marked voltage
2. Inversely proportional to their marked voltage
3. Proportional to the square of their marked voltage
4. Inversely proportional to the square of their marked voltage

Given, \(F=2x^{2}-3x-2.\) Choose correct option:

Two identical charged particles enter a uniform magnetic field with the same speed but at angles 30° and 60° with the field. Let a, b and c be the ratio of their time periods, radii and pitches of the helical paths then
1. abc = 1/$\sqrt{3}$
2. abc > 1
3. abc < 1
4. a = bc

Some magnetic flux is changed from a coil of resistance \(10~\Omega\)$\mathrm{}$. As a result, an induced current is developed in it, which varies with time as shown in the figure. The magnitude of change in flux through the coil in Wb is:
 

Four particles of mass \(m_1 =2m,~m_2 = 4m,\) \(m_3= m,\)  and \(m_4\) are placed at four corners of a square. What should be the value of \(m_4\)${\mathrm{}}_{}$ so that the centre of mass of all four particles is exactly at the centre of the square?
                              
1. \(2m\)
2. \(8m\)
3. \(6m\)
4. none of these

A \(10\) H inductor carries a current of \(20\) A. How much ice at \(0^{\circ}\text{C}\) could be melted by the energy stored in the magnetic field of the inductor?
Latent heat of ice is  \(2.26\times 10^{3}\)${\mathrm{}}^{}$ J/kg .

A rod is falling down with constant velocity \(V_0\) as shown. It makes contact with hinge A and rotates around it. The angular velocity of the rod just after the moment when it comes in contact with hinge A is:
              

The correct mirror image of the figure is:
    

1.		2.
3.		4.

The count rate from 100 ${\mathrm{cm}}^3$ of a radioactive liquid is C. Some of this liquid is now discarded. The count rate of the remaining liquid is found to be C/10 after three half-lives. The volume of the remaining liquid in ${\mathrm{cm}}^3$  is:
1. 20
2. 40
3. 60
4. 80

The coefficient of friction between the block of masses \(m\) and \(2m\) is \(\mu = 2\tan\theta\). There is no friction between the block of mass \(2m\) and inclined plane. The maximum amplitude of the two-block system for which there is no relative motion between both blocks is:
                                   
1. \(g\sin\theta \sqrt{\frac{K}{m}}\)
2. \(\dfrac{mg\sin\theta}{K}\)
3. \(\dfrac{3mg\sin\theta}{K}\)
4. \(\dfrac{\mu mg}{K}\)

A vibrating tuning fork of frequency \(1000~\text{Hz}\) is placed near the open end of a long cylindrical tube. The tube has a side opening and is also fitted with a movable reflecting piston. As the piston is moved through \(x\) distance, the intensity of sound changes from a maximum to a minimum for an observer at the side opening. If the speed of sound is \(350\) meters per second, then \(x\) is:
           
1. \(35~\text{cm}\)
2. \(17.5~\text{cm}\)
3. \(8.75~\text{cm}\)
4. \(10~\text{cm}\)

The combination of gates shown below is equivalent to:
                
1. AND gate
2. XOR gate
3. NOR gate
4. NAND gate

With an increase in temperature, the viscosity of:
1. gases decreases and liquids increases.
2. gases increases and liquids decreases.
3. both gases and liquids increases.
4. both gases and liquids decrease.

If alpha, beta and gamma rays carry the same momentum, which has the longest wavelength?

A bus is moving with a velocity of 5 m/s towards a huge wall. The driver sounds a horn at a frequency of 165 Hz. If the speed of sound in air is equal to 335 m/s, the number of beats heard per second by a passenger on the bus will be: