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What is the ratio of the time period of revolution of electron He⁺ ion sample in the orbit where the path length is three time the de-broglies wavelength to the time period of revolution in the ground state –
1. 27:1
2. 1:27
3. 9:8
4. 8:9

In the reaction;
2Ag + 2H₂SO₄ $\to$Ag₂SO₄ + 2H₂O + SO₂, H₂SO₄ acts as:
1. Oxidizing agent
2. Reducing agent
3. Dehydrating agent
4. None of the above

Select the intermediate in the following reaction mechanism:
O₃(g) $\rightleftharpoons$ O₂(g) +O(g)
O(g) +O₃(g) $\to$ 2O₂(g)
1. O₃(g)
2. O(g)
3. O₂(g)
4. none of these

Incorrectly matched characteristic is:
1. S₈: covalent lattice
2. P₄: tetrahedron
3. S₅^2-: zigzag
4. SiO₂: Covalent lattice

Which of the following cation does not form an amine complex with excess of ammonia?
1. Ag⁺
2. Cu²⁺
3. Cd²⁺
4. Na⁺

The reaction, RCl +NaI $\stackrel{\mathrm{Acetone}}{\to }\mathrm{R}-\mathrm{I}$ + NaCl is known as:
1. Wurtz reaction                     
 2. Fittig reaction                       
3. Frankland's reaction             
 4. Finkelstein's reaction                               

The correct order of second ionisation energies of B, C, N, & O is
1. O > N > C > B
2. O > C > N > B
3. O > B > C > N
4. O > N >B > C

Which is mismatched regarding the shape ?
(1) XeF₄ = Square planar
(2) XeOF₄ = Square Pyramidal
(3) XeF₆ = Distorted Octahedral
(4)XeO₃ = Bent Shape
 

Actinide contraction is mainly related to:
1. Poor shielding by 5f subshell
2. Extraordinary decrement in Z_eff
3. Both (1) and (2)
4. Strong shielding by 5f subshel

What will be the value of $∆\mathrm{G}°$ for the rection ${\mathrm{Cu}}^{+2}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>\mathrm{Fe}<mspace\; width="1em"></mspace>\stackrel{<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>}{\rightleftharpoons }<mspace\; width="1em"></mspace>{\mathrm{Fe}}^{+2}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>\mathrm{Cu}<mspace\; width="1em"></mspace>,<mspace\; width="1em"></mspace>$
if ${\mathrm{E}}_{\raisebox{1ex}{${\mathrm{Cu}}^{+2}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{Cu}$}\right.}^{\circ }<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>+0.34<mspace\; width="1em"></mspace>\mathrm{V}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{E}}_{\raisebox{1ex}{${\mathrm{Fe}}^{+2}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{Fe}$}\right.}^{\circ }<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>-0.44<mspace\; width="1em"></mspace>\mathrm{V}$$$
(1) -65.62 KJ
(2) -75.27 KJ
(3) -150.54 KJ
(4) +150.54 KJ

The IUPAC name of  is
(1) 2-Phenyl ethanone
(2) 1-phenyl ethanone
(3) 1- (Oxoethyl) benzene
(4) 1 - (Ethyaloxo) benzene

Which substrate is appropriate for the preparation of methane and ethane in a single-step process?
1.  H₂C = CH₂
2. CH₃OH
3. CH₃-Br
4. CH₃-CH₂-OH

Above compounds (P) & (Q) can be differentiated by:
(1) amm. AgNO₃
(2) NaOH
(3) FeCl₃
(4) Both (a) & (b)

Give test to differentiate 1,1-dichloroethane and 1, 2-dichloroethane:
1. 2,4-DNP then aq. KOH
2. Aq. KOH then 2, 4-DNP
3. NaHSO₃
4. Lucas reagent

Reagent not used to prepare an alkyl halide from an alcohol is:
(1) HCl+ ZnCl₂
(2) NaCl
(3) PCl₅
(4) SOCl₂
 

Diacetone alcohol is obtained by the reaction of:
(1) acetone and ethanol
(2) acetone and conc. H₂SO₄
(3) acetone and Ba(OH)₂
(4) acetone and Al(OH)₃

Keratin, a structural protein is present in:
1. hair
2. skin
3. wool
4. All of the above

A vitamin which plays a vital role in the coagulating property of blood is:-
(1) vitamin A
(2) vitamin D
(3) vitamin B
(4) vitamin K

The process of respiration in absence of oxygen is called:
(1) metabolic
(2) aerobic
(3) anaerobic
(4) glycolysis

Acetylene can be converted to higher alkyne using the following sequence of reactions:
(1) Na,RX
(2) RMg X,R X
(3) either of these two
(4) none of these

The formation of cyanohydrin from a ketone is an example of:
(1) electrophilic addition
(2) nucleophilic addition
(3) nucleophilic substitution
(4) electrophilic substitution

Boric acid is an  acid because its molecule
(1) contains replaceable H⁺ ion
(2) gives up a proton
(3) accepts OH^- from water releasing proton
(4) combines with proton from water molecule

consider the following compounds

hyperconjugation occurs in 
1. I only
2. II only
3. III only
4. I and III

The name of complex ion, [Fe(CN)₆]^3- is :-
1. hexacyanoiron (III) ion
2. hexacyanitoferrate (III) ion
3. tricyanoferrate (III) ion
4. hexacyanidoferrate (III)ion

What is the molality of the solution of a certain solute in a solvent if there is a freezing point depression of 0.184° and if the freezing point constant is 18.4 K kg mol⁻¹
1. 0.01
2. 1.00
3. 0.001
4. 100

The amount of ice that will seprate out on cooling a solution containing 50 g of ethylene
glycol in 200 g water to -9.3$°$ C is: ($K{\text{'}}_f=1.86<mspace\; width="1em"></mspace>K<mspace\; width="1em"></mspace>molalit{y}^{-1})$
1. 38.71 g
2. 38.71 mg 
3. 42 g 
4. 42 mg 

An irreversible process occuring isothermally in an isolated system leads to
(1) Zero entropy
(2) An increase in the total entropy of the system
(3) A decrease in the total entropy of the system
(4) None of these

The gas that cannot be collected over water is:
1. ${\mathrm{N}}_2$                                   
2. ${\mathrm{O}}_2$
3. ${\mathrm{SO}}_2$                                 
4. ${\mathrm{PH}}_3$

In which case the racemic mixture is obtained by mixing its mirror images (d & l form) in 1:1 molar ratio?
1. [Co(gly)₃]                            
2. [Ni(DMG)₂]
3. cis-[Cu(gly)₂]                              
4. [Zn(en)(gly)]⁺

The electric conduction of a salt solution in water depends on the:
1. Size of its molecules
2. Shape of its molecules
3. Size of solvent molecules
4. Extent of its ionization

For a reaction of the type 2A+B $\to$2C, the rate of the reaction is given by $k{\left[A\right]}^2\left[B\right]$. When the volume of the reaction vessel is reduced to 1/4 th of the original volume, the rate of reaction changes by a factor of
(A) 0.25                                                          
(B) 16
(C) 64                                                             
(D) 4

The heat of formation of HCl(g) from the reaction
H₂(g) + Cl₂(g) $\to <mspace\; width="1em"></mspace>2\mathrm{HCl}\left(\mathrm{g}\right)$; $∆H<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>-44<mspace\; width="1em"></mspace>kcal$ is
1. +44 kcal
2. -44 kcal
3. +22 kcal
4. -22 kcal

Which of the following has maximum boiling point-
(1) $C_4{H}_{10}$                                                           
(2) $C_5{H}_{12}$
(3) $C_6{H}_{14}$                                                           
(4) $C_7{H}_{16}$

According to Bohr’s theory the angular momentum of an electron in the fourth orbit is
1. $\frac{h}{2\mathrm{\pi }}$
2. $\frac{2h}{\mathrm{\pi }}$
3. $\frac{3h}{2\mathrm{\pi }}$
4. $\frac{3h}{\mathrm{\pi }}$

A 6.85 g sample of the hydrates $\mathrm{Sr}{\left(\mathrm{OH}\right)}_2.{\mathrm{xH}}_2\mathrm{O}$ is dried in an oven to give 3.13 g of anhydrous $\mathrm{Sr}{\left(\mathrm{OH}\right)}_2$. The value of x is - 
(Atomic weights : Sr=87.60, O=16.0, H=1.0)
1.  8
2.  12
3.  10
4.  6

Density of dry air containing only ${\mathrm{N}}_2$ and ${\mathrm{O}}_2$ is 1.15 g/L at 740 mm and 300 K. What is % composition of ${\mathrm{N}}_2$ by weight in the air?
1. 78%
2. 75.5%
3. 80.5%
4. 72.75%

Which among the given molecules can exhibit tautomerism? 
 
1.  III only
2.  Both I and III
3.  Both I and II
4.  Both II and III

Benzaldehyde cannot be prepared by:

1.
2.
3.
4.

Three-dimensional molecules with cross-links are formed in case of a :
1. Thermoplastic
2. Thermosetting plastics
3. Both 1 and 2
4. None of these

The first four I.E. values of an element are 284, 412, 656 and 3210 kJ mol^-1. The number of valence electrons in the element are :
1. one
2. two
3. three
4. four

The half cell reduction potential of a hydrogen electrode at pH = 10 will be :
1. 0.59 V                   
2. – 0.59 V
3. 0.059 V                 
4. – 0.059 V

Anhydrous aluminium chloride fumes in moist air owing to the formation of :
1. gaseous aluminium chloride
2. chlorine
3. chlorine dioxide
4. hydrogen chloride

Which of the following is a redox reaction?
1. ${\mathrm{H}}_2{\mathrm{SO}}_4$ with NaOH
2. Formation of ${\mathrm{O}}_3$ in the atmosphere
3. Evaporation of ${\mathrm{H}}_2\mathrm{O}$
4. Oxides of nitrogen forming nitrogen & oxygen from lightening

Silica is reacted with sodium carbonate. Which is the gas liberated?
(1) CO
(2) $O_2$
(3) $O_3$
(4) $C{O}_2$

What is the final product formed when glycerol reacts with oxalic acid at 260°C?
1. Formic acid
2. Allyl alcohol
3. Acrolein
4. Acetic Acid

The correct order of E⁰(M²⁺/M) values with a negative sign for the four successive elements Cr, Mn, Fe and Co is
1. Mn > Fe > Co > Cr
2. Mn > Cr > Fe > Co
3. Fe > Mn > Cr > Co
4. Co > Fe > Mn > Cr

Aqueous solution of urea is:
1. Acidic
2. Alkaline
3. Almost neutral
4. Amphoteric

Determine the value of equilibrium constant (K_c) for the reaction
${\mathrm{A}}_2\left(\mathrm{g}\right)+{\mathrm{B}}_2\left(\mathrm{g}\right)\rightleftharpoons 2\mathrm{AB}\left(\mathrm{g}\right)$
If 10 moles of A₂; 15 moles of B₂ and 5 moles of AB are placed in a 2 litre vessel and allowed to come to equilibrium. The final concentration of AB is 7.5 M:
1. 4.5
2. 1.5
3. 0.6
4. None of these

Find the molar solubility of Fe(OH)₃ in a buffer solution that is 0.10 M in NH₄Cl and 0.10 M in NH₃  :
\(\mathrm{K}_{\mathrm{b}}\left(\mathrm{NH}_3\right)=1.8 \times 10^{-5}\) and 
\(\text K_{ \text {sp}} [ \text {Fe(OH)}_3] = 2.6 \times 10^{-39}\)

Which of the following amines doesn't give the carbylamine reaction?