# Equilibrium: MCQs | Question – Paper 1 2

## Topic: Equilibrium, Test No.: 01, Total MCQs: 15

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 Question 1

Buffer solutions have constant acidity and alkalinity because [CBSE AIPMT 2012]

 A They have large excess of H+ or OH– ions B They have fixed value of pH C These give unionised acid or base on reaction with added acid or alkali D Acids and alkalies in these solutions are shielded from attack by other ions
 Question 2

pH of a saturated solution of Ba(OH)2 is 12. The value of solubility product (Ksp) of Ba(OH)2 is [CBSE AIPMT 2012]

 A 4.0 × 10–6 B 5.0 × 10–6 C 3.3 × 10–7 D 5.0 × 10–7
 Question 3

The solubility of Ca3(PO4)2 in water is y moles/litre. Its solubility product is [West Bengal JEE 2011]

 A 6y4 B 36y4 C 64y5 D 108y5
 Question 4

Consider the following gaseous equilibria with equilibrium constants K1 and K2 respectively.

SO2(g) + O2(g) SO3(g)

2SO3(g) 2SO2(g) + O2(g)

The equilibrium constants are related as ______. [Karnataka CET 2011]

 A B C D Question 5

0.023 g of sodium metal is reacted with 100 cm3 of water. The pH of the resulting solution is ______. [Karnataka CET 2011]

 A 10 B 8 C 9 D 12
 Question 6

pH value of which one of the following is NOT equal to one? [Karnataka CET 2011]

 A 0.1 M CH3 COOH B 0.1 M HNO3 C 0.05 M H2SO4 D 50 cm3 0.4 M HCl + 50 cm3 0.2 M NaOH
 Question 7

H2S is passed into one dm3 of a solution containing 0.1 mole of Zn2+ and 0.01 mole of Cu2+ till the sulphide ion concentration reaches 8.1 × 10–19 moles. Which one of the following statements is true? [Karnataka CET 2011]

[Ksp of ZnS and CuS are 3 × 10–22 and
8 × 10–36 respectively]

 A Only ZnS precipitates B Both CuS and ZnS precipitate C Only CuS precipitates D No precipitation occurs
 Question 8

A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted into CO on the addition of graphite. If the total pressure at equilibrium is 0.8 atm, the value of K is [AIEEE 2011]

 A 0.18 atm B 1.8 atm C 3 atm D 0.3 atm
 Question 9

What is the best description of the change that occurs when Na2O(s) is dissolved in water? [AIEEE 2011]

 A Oxidation number of oxygen increases B Oxidation number of sodium decreases C Oxide ion accepts sharing in a pair of electrons D Oxide ion donates a pair of electrons
 Question 10

An acid HA ionises as

HA H+ + A

The pH of 1.0 M solution is 5. Its dissociation constant would be [AIEEE 2011]

 A 1 × 10–5 B 1 × 10–10 C 5 D 5 × 10–8
 Question 11

Passing H2S gas into a mixture of Mn2+, Ni2+, Cu2+ and Hg2+ ions in an acidified aqueous solution precipitates [IIT JEE 2011]

 A CuS and HgS B MnS and CuS C MnS and NiS D NiS and HgS
 Question 12

The Ksp for Cr(OH)3 is 1.6 × 10–30. The molar solubility of this compound in water is : [AIEEE 2011]

 A 1.6 × 10–30/27 B C D Question 13

Amines behave as [Karnataka CET 2008]

 A Lewis acids B Lewis base C aprotic acid D neutral compound
 Question 14

Hydroxyl ion concentration of 1M HCl is [Karnataka CET 2007]

 A 1 × 10–14 mol dm–3 B 1 × 10–1 mol dm–3 C 1 × 10–13 mol dm–3 D 1 × 101 mol dm–3
 Question 15

If, in the reaction N2O4 2NO2, x is that part of N2O4 which dissociates, then the number of molecules at equilibrium will be [Karnataka CET 2005]

 A 1 B 3 C (1 + x) D (1 + xy)2
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## 2 thoughts on “Equilibrium: MCQs | Question – Paper 1”

• shreya

thanks for d MCQs….i got good idea about d questions n answers

• krishna mohan

THANK YOU VERY MUCH FOR THIS GESTURE