The incorrect postulates of Dalton’s atomic theory are:

(A) Atoms of different elements differ in mass.

(B) Matter consists of divisible atoms.

(C) Compounds are formed when atoms of different elements combine in a fixed ratio.

(D) All the atoms of a given element have different properties including mass.

(E) Chemical reactions involve the reorganization of atoms.

Choose the correct answer from the options given below:

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

The following reaction occurs in the Blast furnace where iron ore is reduced to iron metal:

Fe₂O₃(s) + 3CO(g) ⇌ 2Fe(l) + 3CO₂(g)

Using Le Chatelier’s principle, predict which one of the following will not disturb the equilibrium:

1. Addition of Fe₂O₃
2. Addition of CO₂
3. Removal of CO
4. Removal of CO₂

Identify compound (Z) in the following reaction sequence.

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

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):

Assertion (A): Enthalpy of neutralisation of strong monobasic acid with strong monoacidic base is always −57 kJ mol⁻¹.

Reason (R): Enthalpy of neutralisation is the amount of heat liberated when one mole of H⁺ ions furnished by acid combine with one mole of −OH ions furnished by base to form one mole of water.

Choose the correct answer from the options given below:

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

The statement(s) that are correct about the species O₂²⁻, F⁻, Na⁺, and Mg²⁺:

(A) All are isoelectronic

(B) All have the same nuclear charge

(C) O₂²⁻ has the largest ionic radii

(D) Mg²⁺ has the smallest ionic radii

Choose the most appropriate answer from the options given below:

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

The increasing order of boiling point is:

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

Given below are two statements:

Statement I: In group 13, the stability of +1 oxidation state increases down the group.

Statement II: The atomic size of gallium is greater than that of aluminium.

Choose the most appropriate answer from the options given below:

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

Number of σ and π bonds present in ethylene molecule is respectively:

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

Identify ‘A’ in the following reaction:

1. CH₃-C-C-CH₃ (OH)
2. CH₃-C-C-CH₃
3. CH₃-C=N-NH₂ (C₂H₅)
4. CH₃-CH₃-C=N-NH₂

The reaction at cathode in the cells commonly used in clocks involves:

1. Reduction of Mn from +4 to +3
2. Oxidation of Mn from +3 to +4
3. Reduction of Mn from +7 to +2
4. Oxidation of Mn from +2 to +7

Which one of the following complexes will exhibit the least paramagnetic behaviour?

1. [Co(H₂O)₆]²⁺
2. [Fe(H₂O)₆]²⁺
3. [Mn(H₂O)₆]²⁺
4. [Cr(H₂O)₆]²⁺

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):

Assertion (A): Cis form of alkene is found to be more polar than the trans form.

Reason (R): Dipole moment of trans isomer of 2-butene is zero.

Choose the correct answer from the options given below:

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

Given below are two statements:

Statement I: Nitration of benzene involves the following step.

Statement II: Use of Lewis base promotes the electrophilic substitution of benzene.

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

The correct order of ligands arranged in increasing field strength:

1. Cl^- < OH^- < Br^- < CN^-
2. F^- < Br^- < I^- < NH₃
3. Br^- < F^- < H₂O < NH₃
4. H₂O < OH^- < CN^- < NH₃

Which of the following gives a positive test with ninhydrin?

1. Cellulose
2. Starch
3. Polyvinyl chloride
4. Egg albumin

The metal that shows the highest and maximum number of oxidation states is:

1. Fe
2. Mn
3. Ti
4. Co

An organic compound has 42.1% carbon, 6.4% hydrogen, and the remainder is oxygen. If its molecular weight is 342, then its molecular formula is:

1. C₁₁H₁₈O₁₂
2. C₁₂H₂₀O₁₂
3. C₁₄H₂₀O₁₀
4. C₁₂H₂₂O₁₁

Given below are two statements:

Statement I: Bromination of phenol in solvents with low polarity such as CHCl₃ or CS₂ requires a Lewis acid catalyst.

Statement II: The Lewis acid catalyst polarizes the bromine to generate Br⁺.

In the light of the above statements, choose the correct answer from the options given below:

1. Statement I is true but Statement II is false
2. Both Statement I and Statement II are true
3. Both Statement I and Statement II are false
4. Statement I is false but Statement II is true

Molar ionic conductivities of divalent cation and anion are 57 S cm² mol⁻¹ and 73 S cm² mol⁻¹ respectively. The molar conductivity of a solution of an electrolyte with the above cation and anion will be:

1. 65 S cm² mol⁻¹
2. 130 S cm² mol⁻¹
3. 187 S cm² mol⁻¹
4. 260 S cm² mol⁻¹

The number of neutrons present in the more abundant isotope of boron is x. Amorphous boron upon heating with air forms a product, in which the oxidation state of boron is y. The value of x + y is:

1. 4
2. 6
3. 3
4. 9

The value of Rydberg constant (R_H) is 2.18 × 10⁻¹⁸ J. The velocity of an electron having mass 9.1 × 10⁻³¹ kg in Bohr’s first orbit of the hydrogen atom is ... × 10⁵ m/s (nearest integer):

In a borax bead test under hot conditions, a metal salt (one from the given) is heated at point B of the flame, resulting in a green color salt bead. The spin-only magnetic moment value of the salt is ... BM (Nearest integer):

Given: Atomic numbers of Cu = 29, Ni = 28, Mn = 25, Fe = 26

The heat of combustion of solid benzoic acid at constant volume is -321.30 kJ at 27°C. The heat of combustion at constant pressure is (-321.30 - xR) kJ. The value of x is:

Consider the given chemical reaction sequence:

Total sum of oxygen atoms in Product A and Product B are:

The spin-only magnetic moment value of the ion among Ti²⁺, V²⁺, Co³⁺, and Cr²⁺ that acts as a strong oxidizing agent in aqueous solution is ... BM (Near integer):

Given: Atomic numbers of Ti = 22, V = 23, Cr = 24, Co = 27

During the kinetic study of reaction \( 2A + B \rightarrow C + D \), the following results were obtained:

[A] (M) [B] (M) Initial rate of formation of D
I 0.1 0.1 6.0 × 10^-3
II 0.3 0.2 7.2 × 10^-2
III 0.3 0.4 2.88 × 10^-1
IV 0.4 0.1 2.40 × 10^-2

Based on the above data, the overall order of the reaction is:

An artificial cell is made by encapsulating a 0.2 M glucose solution within a semipermeable membrane. The osmotic pressure developed when the artificial cell is placed within a 0.05 M solution of NaCl at 300 K is × 10^-1 bar. (Nearest Integer):

Given: R = 0.083 L bar mol^-1 K^-1
Assume complete dissociation of NaCl

The number of halobenzenes from the following that can be prepared by Sandmeyer’s reaction is:

In the Lewis dot structure for NO₂^-, the total number of valence electrons around nitrogen is:

9.3 g of pure aniline is treated with bromine water at room temperature to give a white precipitate of the product ‘P’. The mass of product ‘P’ obtained is 26.4 g. The percentage yield is: