Chemistry EXEMPLAR based FST #2

1.

Match the reactions from Column-I with their corresponding descriptions from Column-II and select the correct option.

	Column-l (Name of Reaction)		Column-ll (Description of Reaction)
A.	Reimer-Tiemann reaction	I.	Conversion of phenol to o-hydroxysalicylic aid
B.	Kolbe's reaction	II.	Heated copper at 573K
C.	Conversion of 2 $°$ alcohol to a ketone	III.	Reaction of an alkyl halide with sodium alkoxide
D.	Williamson's synthesis	Iv.	Conversion of phenol to salicylaldehyde

Codes:

	A	B	C	D
1.	II	III	IV	I
2.	III	IV	I	II
3.	I	IV	III	II
4.	IV	I	II	III

2.

What is the correct order of reactivity of alcohols in the following reaction?
$R - OH + HCl \overset{{ZnCl}_{2}}{\to} R - Cl + H_{2} O$

1.	1° > 2°> 3°	2.	1° < 2°> 3°
3.	3°> 2°> 1°	4.	3°> 1°> 2°

3.

Select the correct option based on the statements below:

Assertion (A):	The geometry of formaldehyde molecule is planar.
Reason (R):	Formaldehyde molecule contains sp² hybridized carbon atom.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	Both (A) and (R) are False.

4.

The correct order of increasing acidic strength is:

1.	Phenol < Ethanol < Chloroacetic acid < Acetic acid
2.	Ethanol < Phenol < Chloroacetic acid < Acetic acid
3.	Ethanol < Phenol < Acetic acid < Chloroacetic acid
4.	Chloroacetic acid < Acetic acid < Phenol < Ethanol

5.

Match the acids given in Column-I with their correct IUPAC names given in Column-II and mark the appropriate option:

	Column-l (Acids)		Column-ll (IUPAC names)
A.	Phthalic acid	1.	Hexane-1,6-dioic acid
B.	Glutaric acid	2.	Benzene-1,2-dicarboxylic acid
C.	Succinic acid	3.	Pentane-1,5-dioic acid
D.	Adipic acid	4.	Butane-1,4-dioic acid

Codes:

	A	B	C	D
1.	2	3	4	1
2.	3	1	4	2
3.	1	4	3	2
4.	4	3	2	1

6.

Nucleic acids are the polymers of :
1. Nucleosides
2. Nucleotides
3. Bases
4. Sugars

7.

Reduction of nitrobenzene by which of the following reagent gives aniline?
(a) Sn/HCl
(b) Fe/HCl
(c) H₂-pd
(d) Sn/NH₄OH
Choose the correct option
1. (a, b, c)
2. (b, c, d)
3. (a, c, d)
4. (a, b, d)

8.

Which of the following correctly describes sucrose?

a.	Monosaccharide	b.	Disaccharide
c.	Reducing sugar	d.	Non-reducing sugar

Choose the correct option:

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

9.

Match the reactions given in Column-I with the statements given in Column-II.

	Column-I		Column-II
A.	Ammonolysis	(i)	Amine with a lesser number of carbon atoms
B.	Gabriel phthalimide synthesis	(ii)	Detection test for primary amines.
C.	Hofmann bromamide reaction	(iii)	Reaction of phthalimide with KOH and R—X
D.	Carbylamine reaction	(iv)	Reaction of alkyl halides with NH₃

Codes:

	A	B	C	D
1.	(ii)	(iii)	(iv)	(i)
2.	(iii)	(i)	(iv)	(ii)
3.	(i)	(iv)	(iii)	(ii)
4.	(iv)	(iii)	(i)	(ii)

10.

Match the species in Column I with the type of hybrid orbitals in Column II.

	Column I		Column II
A.	SF₄	1.	sp³d²
B.	IF₅	2.	d²sp³
C.	NO₂⁺	3.	sp³d
D.	NH₄⁺	4.	sp³
		5.	sp

Codes:

Options:	A	B	C	D
1.	3	1	5	4
2.	1	2	3	5
3.	5	4	3	2
4.	4	5	3	2

11.

Which of the following have identical bond order?
(a) ${CN}^{-}$
(b) ${NO}^{+}$
(c) $O_{2}^{-}$
(d) $O_{2}^{2 -}$
Choose the correct option
1. (a), (b)
2. (b), (c)
3. (c), (d)
4. (b), (d)

12.

The correct bond angle for $\mathrm{sp}^2$ hybridization is:
1. $90^\circ$
2. $120^\circ$
3. $180^\circ$
4. $109^\circ$

13.

Compounds A and B react according to the following chemical equation.
A(g) + 2B(g) $\overset{}{\to}$ 2C(g)
The concentration of either A or B was changed keeping the concentrations of one of the reactants constant and rates were measured as a function of initial concentration. The following results were obtained. Choose the correct option for the rate equations for this reaction.

Experiment	Initial concentration of [A]/mol L^–1	Initial concentration of [B]/moI L^–1	Initial rate (mol L^–1 s^–1)
1. 2. 3.	0.30 0.30 0.60	0.30 0.60 0.30	0.10 0.40 0.20

1.

Rate = k {[A]}^{2} [B]

2.

Rate = k [A] {[B]}^{2}

3.

Rate = k [A] [B]

4.

Rate = k {[A]}^{2} {[B]}^{0}

14.

The correct expression for the rate of reaction given below is:
$5 \mathrm{Br}^{-}(\mathrm{aq})+\mathrm{BrO}_3^{-}(\mathrm{aq})+6 \mathrm{H}^{+}(\mathrm{aq}) \rightarrow 3 \mathrm{Br}_2(\mathrm{aq})+3 \mathrm{H}_2 \mathrm{O}(\mathrm{l})$

1.	$\frac{\Delta\left[B r^{-}\right]}{\Delta t}=5 \frac{\Delta\left[H^{+}\right]}{\Delta t} $	2.	$\frac{\Delta\left[\mathrm{Br}^{-}\right]}{\Delta t}=\frac{6}{5} \frac{\Delta\left[\mathrm{H}^{+}\right]}{\Delta t} $
3.	$\frac{\Delta[\mathrm{Br^-}]}{\Delta t}=\frac{5}{6} \frac{\Delta\left[\mathrm{H}^{+}\right]}{\Delta t} $	4.	$\frac{\Delta\left[\mathrm{Br}^{-}\right]}{\Delta t}=6 \frac{\Delta\left[\mathrm{H}^{+}\right]}{\Delta t}$

15.

Select the correct option based on statements below:

Assertion (A):	All collisions of reactant molecules lead to product formation.
Reason (R):	Only those collisions in which molecules have the correct orientation and sufficient kinetic energy lead to the compound formation.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

16. Among the following elements, identify the one that is not an actinoid :
1. Curium (Z = 96)
2. Californium (Z = 98)
3. Uranium (Z = 92)
4. Terbium (Z = 65)

17.

Which one of the following elements, based on their electronic configurations, has the highest ionization enthalpy?
1. $[Ne] 3 s^{2} 3 p^{1}$
2. $[Ne] 3 s^{2} 3 p^{3}$
3. $[Ne] 3 s^{2} 3 p^{2}$
4. $[Ar] 3 d^{10} 4 s^{2} 4 p^{3}$

18.

Given are the following sets of species:
(a) ${Zn}^{2 +}, {Ca}^{2 +}, {Ga}^{3 +}, {Al}^{3 +}$
(b) $K^{+}, {Ca}^{2 +}, {Sc}^{3 +}, {Cl}^{-}$
(c) $P^{3 -}, S^{2 -}, {Cl}^{-}, K^{+}$
(d) ${Ti}^{4 +}, Ar, {Cr}^{3 +}, V^{5 +}$
The sets containing only isoelectronic ions among the above are:
1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)

19.

Given below are two statements:

Assertion (A):	Electron gain enthalpy becomes less negative as we go down a group.
Reason (R):	The size of the atom increases on going down the group and the added electron would be farther from the nucleus.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

20.

What kind of isomerism exists between [Cr(H₂O)₆]Cl₃(violet) and [Cr(H₂O)₅Cl]Cl₂⋅H₂O (greyish-green)?
1. Linkage isomerism
2. Solvate isomerism
3. lonisation isomerism
4. Coordination isomerism

21.

The CFSE for octahedral ${[C o C l_{6}]}^{4 -}$ is 18,000 cm $^{- 1}$ . The CFSE for tetrahedral will be $\mathrm{CoCl}_4{ }^{2-}$: $[]$ $\mathrm{CoCl}_4{ }^{2-}$
1. 6000 cm $^{- 1}$
2. 16,000 cm $^{- 1}$
3. 18,000 cm $^{- 1}$
4. 8,000 cm $^{- 1}$

22.

IUPAC name of $[Pt {({NH}_{3})}_{2} Cl ({NO}_{2})]$ is:
1. Platinum diaminechloronitrite
2. Chloronitrito-N-ammineplatinum (ll)
3. Diamminechloridonitrito-N-platinum (ll)
4. Diamminechloronitrito-N-platinate (ll)

23.

Which of the following species is not expected to be a ligand?
1. NO
2. NH $_{4}^{+}$
3. NH $_{2}$ CH $_{2}$ CH $_{2}$ NH $_{2}$
4. CO

24.

The value of $∆ n$ for the following reaction will be :
${NH}_{4} Cl (s) ⇌ {NH}_{3} (g) + HCl (g)$

1.	1	2.	0.5
3.	1.5	4.	2

25.

Assertion (A):	For any chemical reaction at a particular temperature, the equilibrium constant is fixed and is a characteristic property.
Reason (R):	Equilibrium constant is independent of temperature.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

26.

Match Column-I with Column-II and mark the appropriate option:

	Column-I (Term)		Column-II (Conditions)
(A)	Equilibrium	(i)	$∆ G > 0, K < 1$
(B)	Spontaneous reaction	(ii)	$∆ G = 0$
(C)	Non-spontaneous reaction	(iii)	$∆ G < 0, K > 1$

Codes:

Options:	A	B	C
1.	(ii)	(iii)	(i)
2.	(i)	(ii)	(iii)
3.	(ii)	(i)	(iii)
4.	(iii)	(i)	(ii)

27.

Given below are two statements:

Assertion (A):	Cu is less reactive than hydrogen.
Reason (R):	E°_{Cu²⁺/ Cu} is negative.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

28.

Assertion (A):	Copper sulphate can be stored in a zinc vessel.
Reason (R):	Zinc is less reactive than copper.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	Both (A) and (R) are False.

29.

Transition elements show magnetic moment due to spin and orbital motion of electrons. Which of the following metallic ions have almost same spin only magnetic moment?
a. Co²⁺
b. Cr²⁺
c. Mn²⁺
d. Cr³⁺
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

30.

When $K M n O_{4}$ solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because
1.   $C O_{2}$ is formed as the product
2. Reaction is exothermic
3.   $M n O_{4}^{-}$ catalyses the reaction
4.   $M n^{2 +}$ acts as autocatalyst

31.

Assertion (A):	The highest oxidation state of osmium is +8 .
Reason (R):	Osmium is a 5d-block element.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	Both (A) and (R) are False.

32.

Given below are two statements:

Assertion (A):	Separation of Zr and Hf is difficult.
Reason (R):	Because Zr and Hf lie in the same group of the periodic table.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is not true but (R) is true
4.	Both (A) and (R) are false.

33.

Given below are two statements:

Assertion (A):	It is difficult to replace chlorine by -OH in chlorobenzene in comparison to that in chloroethane.
Reason (R):	Chlorine carbon (C—Cl) bond in chlorobenzene has a partial double bond character due to resonance.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

34.

The correct match of column I (Reactions) with column II (Name of reactions) is:

Column I	Column II
A.	1.	Fittig reaction
B.	2.	Wurtz-Fittig reaction
C.	3.	Finkelstein reaction
D.	4.	Sandmeyer reaction

Codes:

	A	B	C	D
1.	2	1	4	3
2.	3	1	4	2
3.	1	4	3	2
4.	4	1	3	2

35. The halogen exchange reaction among the following is exhibited by:

1.
2.
3.
4.

36.

Match the species in Column-I with their corresponding hybridisation in Column-II:

	Column-I (Species)		Column-II (Hybridisation)
A.	Boron in ${[B {(OH)}_{4}]}^{-}$	i.	sp²
B.	Aluminium in ${[Al {(H_{2} O)}_{6}]}^{3 +}$	ii.	sp³
C.	Carbon in Buckminsterfullerene	iii.	sp³d²
D.	Germanium in ${[{GeCl}_{6}]}^{2 -}$

Codes:

	A	B	C	D
1.	ii	iii	i	iii
2.	i	i	iii	ii
3.	iii	ii	ii	i
4.	i	iii	ii	iii

37.

Match the items in Columns I and II and mark the correct option.

Column I	Column II
A. H₂SO₄	1. Highest electron affinity
B. CCl₃NO₂	2. Chalcogen
C. Cl₂	3. Tear gas
D. Sulphur	4. Storage batteries

Codes:

	A	B	C	D
1.	4	3	1	2
2.	3	4	1	2
3.	4	1	2	3
4.	2	1	3	4

38. Arrange the halogens

F_{2}, {Cl}_{2}, {Br}_{2}, I_{2}

, in order of their increasing reactivity with alkanes:
1.

I_{2} < {Br}_{2} < {Cl}_{2} < F_{2}

2.

{Br}_{2} < {Cl}_{2} < F_{2} < I_{2}

3.

F_{2} < {Cl}_{2} < {Br}_{2} < I_{2}

4.

{Br}_{2} < I_{2} < {Cl}_{2} < F_{2}

39.

What is the impact of the nitro substituent on the reactivity and orientation of electrophilic substitution in nitrobenzene?

(a)	Deactivates the ring by inductive effect.
(b)	Activates the ring by inductive effect.
(c)	Decreases the charge density at the ortho and para positions of the ring relative to the meta position by resonance.
(d)	Increases the charge density at the meta position relative to the ortho and the para positions of the ring by resonance.

Choose the correct option:
1. a and b
2. b and c
3. c and d
4. a and c

40.

Match Column I with Column II.

	Column I		Column II
A.	Dumas method	1.	AgNO₃
B.	Kjeldahl’s method	2.	Silica gel
C.	Carius method	3.	Nitrogen gel
D.	Chromatography	4.	Ammonium sulphate

Choose the correct answer from the options given below:

	A	B	C	D
1.	3	4	1	2
2.	1	2	3	4
3.	1	4	3	2
4.	4	1	3	2

41.

Electrophilic addition reactions proceed in two steps. The first step involves the addition of an electrophile. The major intermediate formed in the first step is:
$\mathrm{H}_3 \mathrm{C}-\mathrm{HC}=\mathrm{CH}_2+\mathrm{H}^{+} \rightarrow \text { ? }$
1. $2 °$ carbanion
2. $1 °$ carbocation
3. $2 °$ carbocation
4. $1 °$ carbanion

42.

$E^{Θ}$ values of some redox couples are given below. On the basis of these values choose the correct option.
$E^{Θ} values : {Br}_{2} / {Br}^{-} = + 1.90$
${Ag}^{+} / Ag (s) = + 0.80$
${Cu}^{2 +} / Cu (s) = + 0.34;$
$I_{2} (s) / I^{-} = + 0.54$

1.	Cu will reduce Br^–	2.	Cu will reduce Ag
3.	Cu will reduce I^–	4.	Cu will reduce Br₂

43.

Given below are two statements:

Assertion (A):	When a solution is separated from the pure solvent by a semipermeable membrane, the solvent molecules pass through it from the pure solvent side to the solution side.
Reason (R):	Diffusion of solvent occurs from a region of high concentration solution to a region of low concentration solution.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

44.

A beaker contains a solution of substance 'A'. Precipitation of substance ‘A’ takes place when a small amount of 'A' is added to the solution. The solution is:

1.	Saturated.	2.	Supersaturated.
3.	Unsaturated.	4.	Concentrated.

45.

Which of the following is responsible to rule out the existence of definite paths or trajectories of electrons?
1. Pauli's exclusion principle
2. Heisenberg's uncertainty principle
3. Hund's rule of maximum multiplicity
4. Aufbau principle

46.

Which of the following statement indicates that the law of multiple proportions is being followed?

1.	A sample of carbon dioxide taken from any source will always have carbon and oxygen in the ratio of 1:2.
2.	Carbon forms two oxides namely, CO₂ and CO, where masses of oxygen that combine with a fixed mass of carbon are in the simple ratio of 2:1.
3.	When magnesium burns in oxygen, the amount of magnesium used for the reaction is equal to the amount of magnesium formed in magnesium oxide.
4.	At constant temperature and pressure, 200 mL of hydrogen will combine with 100 mL of oxygen to produce 200 mL of water vapour.

47.

The mass percent of carbon in carbon dioxide is:

1.	0.034%	2.	27.27%
3.	3.4%	4.	28.7%

48.

The number of angular nodes for 4d orbital is :
1. 4
2. 3
3. 2
4. 1

49. Select the correct option based on statements below:

Assertion (A):	A liquid crystallizes into a solid and is accompanied by a decrease in entropy.
Reason (R):	In crystals, molecules organize in an ordered manner.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

50.

Match the following process with entropy change:

	Reaction		Entropy change
A.	A liquid vaporizes	1.	$∆ S = 0$
B.	Reaction is non-spontaneous at all temperatures and $∆ H$ is positive	2.	$∆ S = positive$
C.	Reversible expansion of an ideal gas	3.	$∆ S = negative$

Codes:

	A	B	C
1.	2	3	1
2.	1	2	3
3.	1	3	2
4.	3	2	1

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1.	\(\frac{\Delta\left[B r^{-}\right]}{\Delta t}=5 \frac{\Delta\left[H^{+}\right]}{\Delta t} \)	2.	\(\frac{\Delta\left[\mathrm{Br}^{-}\right]}{\Delta t}=\frac{6}{5} \frac{\Delta\left[\mathrm{H}^{+}\right]}{\Delta t} \)
3.	\(\frac{\Delta[\mathrm{Br^-}]}{\Delta t}=\frac{5}{6} \frac{\Delta\left[\mathrm{H}^{+}\right]}{\Delta t} \)	4.	\(\frac{\Delta\left[\mathrm{Br}^{-}\right]}{\Delta t}=6 \frac{\Delta\left[\mathrm{H}^{+}\right]}{\Delta t}\)

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