Question 1:

The molar conductivity for electrolytes A and B are plotted against √C. Electrolytes A and B respectively are:

Graph:

1. Weak electrolyte, Weak electrolyte
2. Strong electrolyte, Strong electrolyte
3. Weak electrolyte, Strong electrolyte
4. Strong electrolyte, Weak electrolyte

Question 2:

Methods used for purification of organic compounds are based on:

1. Neither on nature of compound nor on the impurity present.
2. Nature of compound only.
3. Nature of compound and presence of impurity.
4. Presence of impurity only.

Question 3:

In the following sequence of reaction, the major products B and C respectively are:

Reaction:

Question 4:

The correct order of basic strength of Pyrrole, Pyridine, and Piperidine is:

1. Piperidine > Pyridine > Pyrrole
2. Pyrrole > Pyridine > Piperidine
3. Pyridine > Piperidine > Pyrrole
4. Pyrrole > Piperidine > Pyridine

Question 5:

In which one of the following pairs do the central atoms exhibit sp² hybridization?

1. BF₃ and NO₂⁻
2. NH₂⁻ and H₂O
3. H₂O and NO₂
4. NH₂⁻ and BF₃

Question 6:

The F⁻ ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much harder fluoroapatite having the formula:

1. [3(Ca₃(PO₄)₂ ⋅ CaF₂)]
2. [3(Ca₂(PO₄)₂ ⋅ Ca(OH)₂)]
3. [3(Ca₃(PO₄)₃ ⋅ CaF₂)]
4. [3(Ca₃(PO₄)₂ ⋅ Ca(OH)₂)]

Question 7:

The relative stability of the contributing structures is:

1. (I) > (III) > (II)
2. (I) > (II) > (III)
3. (II) > (I) > (III)
4. (III) > (II) > (I)

Question 8:

Given below are two statements:
• Statement (I): The oxidation state of an element in a particular compound is the charge acquired by its atom on the basis of electron gain enthalpy consideration from other atoms in the molecule.
• Statement (II): pπ–pπ bond formation is more prevalent in second-period elements over other periods.
In the light of the above statements, choose the most appropriate answer from the options given below:

1. Both Statement I and Statement II are incorrect.
2. Statement I is correct but Statement II is incorrect.
3. Both Statement I and Statement II are correct.
4. Statement I is incorrect but Statement II is correct.

Question 9:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
• Assertion (A): SN2 reaction of C₆H₅CH₂Br occurs more readily than the SN2 reaction of CH₃CH₂Br.
• Reason (R): The partially bonded unhybridized p-orbital that develops in the trigonal bipyramidal transition state is stabilized by conjugation with the phenyl ring.
In the light of the above statements, choose the most appropriate answer from the options given below:

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

Question 10:

For the given compounds, the correct order of increasing pKa value is:

1. (E) < (D) < (C) < (B) < (A)
2. (D) < (E) < (C) < (B) < (A)
3. (E) < (D) < (B) < (A) < (C)
4. (B) < (D) < (A) < (C) < (E)

Question 11:

Assertion (A): Both rhombic and monoclinic sulphur exist as S₈, while oxygen exists as O₂.
Reason (R): Oxygen forms pπ–pπ multiple bonds with itself and other elements having small size and high electronegativity like C, N, which is not possible for sulphur.
In the light of the above statements, choose the most appropriate answer from the options given below:

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

Question 12:

Assertion (A): The total number of geometrical isomers shown by [Co(en)₂Cl₂]⁺ complex ion is three.
Reason (R): [Co(en)₂Cl₂]⁺ complex ion has an octahedral geometry.
In the light of the above statements, choose the most appropriate answer from the options given below:

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

Question 13:

The electronic configuration of Cu(II) is 3d⁹, whereas that of Cu(I) is 3d¹⁰. Which of the following is correct?

1. Cu(II) is less stable.
2. Stability of Cu(I) and Cu(II) depends on the nature of copper salts.
3. Cu(II) is more stable.
4. Cu(I) and Cu(II) are equally stable.

Question 14:

What is the structure of C?

1. Linear
2. Bent
3. Trigonal Planar
4. Tetrahedral

Question 15:

Compare the energies of the following sets of quantum numbers for a multielectron system:

(A) n = 4, l = 1
(B) n = 4, l = 2
(C) n = 3, l = 1
(D) n = 3, l = 2
(E) n = 4, l = 0
Choose the correct order of energies:

1. (B) > (A) > (C) > (E) > (D)
2. (E) > (C) < (D) < (A) < (B)
3. (E) > (C) > (A) > (D) > (B)
4. (C) < (E) < (D) < (A) < (B)

Question 16:

The correct order of basic strength of Pyrrole, Pyridine, and Piperidine is:

1. Piperidine > Pyridine > Pyrrole
2. Pyrrole > Pyridine > Piperidine
3. Pyridine > Piperidine > Pyrrole
4. Pyrrole > Piperidine > Pyridine

Question 17:

The molar conductivity for electrolytes A and B are plotted against C^1/2. Electrolytes A and B respectively are:

1. Weak electrolyte, Weak electrolyte
2. Strong electrolyte, Strong electrolyte
3. Weak electrolyte, Strong electrolyte
4. Strong electrolyte, Weak electrolyte

Question 18:

Methods used for purification of organic compounds are based on:

1. Neither on nature of compound nor on the impurity present
2. Nature of compound only
3. Nature of compound and presence of impurity
4. Presence of impurity only

Question 19:

In the following sequence of reactions, the major products B and C respectively are:

1. Wurtz reaction, Grignard reagent
2. Substitution, Elimination
3. Hydrolysis, Oxidation
4. Halogenation, Nitration

Question 20:

The total number of species from the following in which one unpaired electron is present, is:

N₂, O₂, C⁻₂, O⁻₂, H⁺₂, CN⁻, He⁺₂

1. 3
2. 4
3. 5
4. 6

Question 21:

Number of ambidentate ligands among the following is:

NO⁻₂, SCN⁻, C₂O²⁻₄, NH₃, CN⁻, SO²⁻₄, H₂O

1. 2
2. 3
3. 4
4. 5

Question 22:

Total number of essential amino acids among the given list of amino acids is:

Arginine, Phenylalanine, Aspartic acid, Cysteine, Histidine, Valine, Proline

1. 3
2. 4
3. 5
4. 6

Question 23:

Number of colourless lanthanoid ions among the following is:

Eu³⁺, Lu³⁺, Nd³⁺, La³⁺, Sm³⁺

1. 1
2. 2
3. 3
4. 4

Question 24:

The correct order of increasing pKa value is:

1. (E) < (D) < (C) < (B) < (A)
2. (D) < (E) < (C) < (B) < (A)
3. (E) < (D) < (B) < (A) < (C)
4. (B) < (D) < (A) < (C) < (E)

Question 25:

For the given compounds, the correct order of increasing stability of their resonance structures is:

1. (III) < (II) < (I)
2. (I) < (II) < (III)
3. (III) > (I) > (II)
4. (I) < (III) < (II)

Question 26:

The correct order of hybridization in the following molecules is:

NH₃, H₂O, BF₃, and CO₂

1. sp > sp² > sp³
2. sp³ > sp² > sp
3. sp > sp³ > sp²
4. sp² > sp > sp³

Question 27:

The total number of species from the following in which one unpaired electron is present, is:

N₂, O₂, C^-2, O^-2, H⁺², CN^-, He⁺²

1. 3
2. 4
3. 5
4. 6

Question 28:

Number of ambidentate ligands among the following is:

NO^-2, SCN^-, C₂O₄^2-, NH₃, CN^-, SO₄^2-, H₂O

1. 2
2. 3
3. 4
4. 5

Question 29:

Total number of essential amino acids among the given list of amino acids is:

Arginine, Phenylalanine, Aspartic acid, Cysteine, Histidine, Valine, Proline

1. 3
2. 4
3. 5
4. 6

Question 30:

Number of colourless lanthanoid ions among the following is:

Eu³⁺, Lu³⁺, Nd³⁺, La³⁺, Sm³⁺

1. 1
2. 2
3. 3
4. 4