Important Questions of Equilibrium Chemistry | Zigya

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement
141.

The pH of a saturated solution of a metal hydroxide of formula X(OH)2 is 12.0 at 298 K. What is the solubility product of a metal hydroxide at 298 K (in mol3 L-3)?

  • 5 × 10-7

  • 2 × 10-6

  • 1 × 10-7

  • 5 × 10-5


142.

An inorganic salt (A) is decomposed on heating to give two products (B) and (C). Compound (C) is a liquid a room temperature and is neutral to litmus while the compound (B) is a colourless neutral gas. Compounds (A), (B) and (C) are 

  • NH4NO3, N2O, H2O

  • NH4NO2, NO, H2O

  • CaO, H2O, CaCl2

  • Ba(NO3)2, H2O, NO2


143.

The sum of pH and pKb for a basic buffer solution is 13. The ratio of the concentration of the base to that of the salt is

  • 10

  • 1

  • 0.05

  • 0.1


144.

Two equilibria, AB A +B. are simultaneously maintained in a solution with equilibrium constants, K1 and K2 respectively. The ratio of [A+] to [AB2-] in the solution is

  • directly proportional to [B-]

  • inversely proportional to [B-]

  • directly proportional to the square of [B-]

  • inversely proportional to the square of [B-]


Advertisement
145.

A current strength of 9.65 A is passed through excess fused AlCl3 for 5 h. How many litres of chlorine will be liberated at STP? (F = 96500 C)

  • 2.016

  • 1.008

  • 11.2

  • 20.16


146.

The colour of the soltuion/ precipitate obtained in the elemental analysis of an organic compound and the molecule/ion responsible for the colour are given below. Choose the incorrectly matched pair.

  • Prussian blue - Fe4[Fe(CN)6]3.xH2O

  • Yellow - (NH4)2MoO4

  • Violet colour - [Fe(CN)5NOS]4-

  • Blood red colour - [Fe(SCN)]2+


147.

Among the following amines, which one has the highest pK, value in aqueous solution?

  • Methanamine

  • N, N-dimethylaniline

  • Ethanamine

  • Benzenamine


148.

In the following equilibrium reaction,

2A  B + C

the equilibrium concentration of A, B and C are 1 × 10-3 M, 2 × 10-3 M and 3 × 10-3 M respectively at 300 K. The value of Kc for this equilibrium at the same temperature is

  • 16

  • 6

  • 136

  • 36


Advertisement
149.

Which one of the following is the correct statement?

  • HCO3- is the conjugate base of CO32-

  • NH2- is the conjugate acid of NH3

  • H2SO4 is the conjugate acid of HSO4-

  • NH3 is the conjugate base of NH2-


150.

Choose the weak monobasic acid, among the following

  • H3BO3

  • H3PO3

  • H3PO4

  • HNO3


Advertisement