Question 1:

Match List I with List II:

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

Question 2:

Given are two statements:

Statement I: In froth flotation method a rotating paddle agitates the mixture to drive air out of it.

Statement II: Iron pyrites are generally avoided for extraction of iron due to environmental reasons.

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

Question 3:

Which of the following represents the correct order of metallic character of the given elements?

1. Si < Be < Mg < K
2. Be < Si < Mg < K
3. K < Mg < Be < Si
4. Be < Si < K < Mg

Question 4:

Given below are two statements, one labeled as Assertion A and the other as Reason R:

Assertion A: The alkali metals and their salts impart characteristic color to reducing flame.

Reason R: Alkali metals can be detected using flame tests.

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

Question 5:

What is the mass ratio of ethylene glycol (C₂H₆O₂, molar mass = 62 g/mol) required for making 500 g of 0.25 molar aqueous solution and 250 mL of 0.25 molar aqueous solution?

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

Question 6:

Given two statements about dipole moments:

Statement I: Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative center and head pointing towards the positive center.

Statement II: The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules.

1. Both Statement I and Statement II are correct.

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

Question 7:

Given below are two statements, one labeled as Assertion A and the other as Reason R:

Assertion A: Butylated hydroxyl anisole when added to butter increases its shelf life.

Reason R: Butylated hydroxyl anisole is more reactive towards oxygen than food.

• Both A and R are correct and R is the correct explanation of A.
• A is correct but R is not correct.
• A is not correct but R is correct.
• Both A and R are correct but R is NOT the correct explanation of A.

Question 8:

Given below are several statements:

A. Ammonium salts produce haze in the atmosphere.

B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals.

C. Polychlorinated biphenyls act as cleaning solvents.

D. 'Blue baby' syndrome occurs due to the presence of excess sulphate ions in water.

• A, B and C only
• B and C only
• A and D only
• A and C only

Question 9:

Match List I with List II:

• A-I, B-IV, C-II, D-III
• A-III, B-II, C-I, D-IV
• A-III, B-II, C-IV, D-I
• A-III, B-IV, C-II, D-I

Question 10:

Which one among the following metals is the weakest reducing agent?

• K
• Rb
• Na
• Li

Question 11:

Match List I with List II:

• A-III, B-IV, C-II, D-I
• A-IV, B-III, C-I, D-II
• A-II, B-III, C-I, D-IV
• A-III, B-I, C-IV, D-II

Question 12:

Match List I with List II (Uses of polymers):

• A-III, B-II, C-IV, D-I
• A-III, B-IV, C-II, D-I
• A-III, B-IV, C-I, D-II
• A-III, B-I, C-IV, D-II

Question 13:

Given below are two statements, one labeled as Assertion A and the other as Reason R:

Assertion A: Carbon forms two important oxides — CO and CO₂. CO is neutral whereas CO₂ is acidic in nature.

Reason R: CO₂ can combine with water in a limited way to form carbonic acid, which is sparingly soluble in water.

• Both A and R are correct and R is the correct explanation of A.
• Both A and R are correct but R is NOT the correct explanation of A.
• A is not correct but R is correct.
• A is correct but R is not correct.

Question 14:

Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from:

• +3 to +1
• +6 to +3
• +2 to +1
• +6 to +2

Question 15:

When the hydrogen ion concentration [H⁺] changes by a factor of 1000, the value of pH of the solution:

• increases by 1000 units
• decreases by 3 units
• decreases by 2 units
• increases by 2 units

Question 16:

Match List I with List II:

• A-IV, B-I, C-III, D-II
• A-III, B-II, C-I, D-IV
• A-III, B-I, C-II, D-IV
• A-II, B-III, C-IV, D-I

Question 17:

Find out the major product from the following reaction with concentrated H₂SO₄:

Correct Answer: (1).

Question 18:

Identify 'A' in the given reaction to produce the major product:

Correct Answer: (2).

Question 19:

The isomeric deuterated bromide with molecular formula C₄H₉Br having two chiral carbon atoms is:

• 2-Bromo-1-deuterobutane
• 2-Bromo-2-deuterobutane
• 2-Bromo-3-deuterobutane
• 2-Bromo-1-deutero-2-methylpropane

Question 20:

A chloride salt solution acidified with dilute HNO₃ gives a curdy white precipitate, [A], on addition of AgNO₃. [A] on treatment with NH₄OH gives a clear solution, B. The correct products are:

• [HAgCl]₂ and [Ag(NH₃)₂]Cl
• [HAgCl]₃ and [NH₄](AgOH)₂
• AgCl and [Ag(NH₃)₂]Cl
• AgCl and [NH₄](AgOH)₂

Question 21:

The number of given orbitals which have electron density along the axis is:

P_x, P_y, P_z, d_xy, d_yz, d_xy, d_z², d_x²-y²

Question 22:

Number of compounds giving (i) red colouration with ceric ammonium nitrate and also (ii) positive iodoform test from the following is:

Question 23:

The number of pairs of the solution having the same value of osmotic pressure from the following is:

A. 0.500 M C₆H₅OH (aq) and 0.25 M KBr (aq)

B. 0.100 M K₄[Fe(CN)₆] (aq) and 0.100 M FeSO₄(NH₄)₂SO₄ (aq)

C. 0.05 M K₄[Fe(CN)₆] (aq) and 0.25 M NaCl (aq)

D. 0.15 M NaCl (aq) and 0.1 M BaCl₂ (aq)

E. 0.02 M KCl MgCl₂·6H₂O (aq) and 0.05 M KCl (aq)

Question 24:

28.0 L of CO₂ is produced on complete combustion of 16.8 L gaseous mixture of ethene and methane at 25°C and 1 atm. Heat evolved during the combustion process is ___ kJ.

Given:

ΔH_c(CH₄) = -900 kJ/mol

ΔH_c(C₂H₄) = -1400 kJ/mol

Question 25:

Total number of moles of AgCl precipitated on addition of excess of AgNO₃ to one mole each of the following complexes: [Co(NH₃)₂Cl₂]Cl, [Ni(H₂O)₆]Cl₂, [Pt(NH₃)₂Cl₂], and [Pd(NH₃)₄]Cl₂

Question 26:

Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is:

Given:

Molar mass of A = 84 g/mol

Question 27:

Pt(s)|H₂(g)(1 bar)|H⁺(aq)(1M)||M³⁺(aq), M⁺(aq)|Pt(s)

The E_cell for the given cell is 0.1115 V at 298 K when [M⁺(aq)]/[M³⁺(aq)] = 10ᵃ.

Given:

E°_M³⁺/M⁺ = 0.2 V

2.303 (RT/F) = 0.059 V

Question 28:

Based on the given figure, the number of correct statement/s is/are:

A. Surface tension is the outcome of equal attractive and repulsion forces acting on the liquid molecule in bulk.

B. Surface tension is due to uneven forces acting on the molecules present on the surface.

C. The molecule in the bulk can never come to the liquid surface.

D. The molecules on the surface are responsible for vapor pressure if the system is a closed system.

Question 29:

A first order reaction has the rate constant, k = 4.6 × 10⁻³ s⁻¹. The number of correct statement/s from the following is/are:

A. Reaction completes in 1000 s.

B. The reaction has a half-life of 500 s.

C. The time required for 10% completion is 25 times the time required for 90% completion.

D. The degree of dissociation is equal to 1 - e⁻ᵏᵗ.

E. The rate and the rate constant have the same unit.

Question 30:

The number of incorrect statement/s from the following is/are:

A. Water vapours are adsorbed by anhydrous calcium chloride.

B. There is a decrease in surface energy during adsorption.

C. As the adsorption proceeds, ΔH becomes more and more negative.

D. Adsorption is accompanied by a decrease in entropy of the system.