Class 12 Chemistry Chapter 2 Solutions MCQs | Class 12 Chemistry Chapter 2 Solutions Short Questions with Answers

Sports GK Questions and Answers 2024 (Latest Updated)

Awards & Honours GK Questions 2024 (Latest Updated)

Questions
What would be tne volume of 15% w/v and 5% w/v NaOH solution required to prepare 1 litre aqueous solution of 2M NaOH ? (M.w of Naoh = 40 gram/mole)
A 300 ml, 700ml
B 250 ml, 750ml
C 400 ml, 600ml
D 280 ml, 720ml

Answer:300 ml, 700ml
2 At constant temperature, vapour pressure of an aqueous solution of 1.5 kg glucose decreases to 0.98% in comparision with vapour pressure of pure water then, what quantity of glucose in gram dissolved in the solution ? (Molecular weight of glucose = 180 gm/mole)
A 148.5 gm
B 14.85 gm
C 125 gm
D 135 gm

Answer: 135 gm
3 At constant pressure, 0.5 m NaCl aqueous solution is diluted by adding water in it. Which of the following statement is correct in this reference ?
A Van’t Hoff factor (i) and boiling point of the solution both decreases
B Van’t Hoff factor (i) and boiling point of the solution both increases
C Van’t Hoff factor (i) decreases while boiling point of the solution both increases
D Van’t Hoff factor (i) increases while boiling point of the solution both decreases

Answer:Van’t Hoff factor (i) increases while boiling point of the solution both decreases
4 Boiling point of an aqueous solution of 0.5 m ionic solid substance is 100.5°C; then state the value of i ? (Kb = 0.512oC -kg – mole-1)
A 1.95
B 1.85
C 1.25
D 0.85

Answer:1.95
5 Aqueous solution of substance boils at 100.5oC at 1 bar pressure; then at what temperature it freezes ? (Kb = 0.512oC -kg - mole-1, Kf = 1.86oC - kg – mole-1)
A 11.2oC
B 29.84oF
C 271.8oK
D -1.2oC

Answer: 271.8oK
6 1.4 m aqueous solution of a weak electrolyte AB2 ionizes 20%, then, state boiling point and freezing point of the solution respectively.
A 100.86oC, -3.12oC
B 101oC, -3.65oC
C 274oC, -3.65oC
D 374oC, -3.65oC

Answer: 101oC, -3.65oC
7 Solute substance in a 1.4 m aqueous solution associates by 25%, then, find the boiling point and freezing point of solution; where, solute exists as trimer in the solution; thus, n = 3. (Kb =0.512oC • kg • mole-1, Kf = 1.86oC • kg • mole-1)
A 100.448oC, -2.28oC
B 373.58oK, -3.65oC
C 100.59oC, 2.17oC
D 213oF, 270.83ok

Answer: 213oF, 270.83ok
8 Molecular mass of a weak acid HA is 60gm/mo1 Ifs experimental molecular mass in its 0.7 M aqueous solution obtained from colligative properties is 50gm/mo1. Then calculate ionistion consteint of weak acid HA.
A 0.023
B 0.0085
C 0.035
D 0.085

Answer:0.035
9 At constant temperature, the total pressure of a homogeneous mixture of gas-A and gas-B in a closed container collected on water is 2.0 bar. Their ratio of mole frachion is 1.6 If the values of their KH are 2.4 ×10+4 bur and 4.8 ×104 bar respectively then calcwate its ration of mole fraction when dissolhed in H2O.
A 1:2
B 2:1
C 3:1
D 1:3

Answer: 1:3
10 Naphthalene is soluble in ether or benzene because. ?
A dipole-dipole attraction is equal
B London forces are equal
C Hydrogen bond
D Ionic attraction

Answer: London forces are equal
11 Four Liauids are given.
(i) Water : more polar and capacity to torm H-bond.
(ii) Hexanol : moderatly pdar and partial capacity to form H-bond.
(iii) Chloro form : moderatly polar and does not capable to form H-bond.
(iv) Octane : non polar and does not capable to form H-bond.
which of the following pair of liquids mixed with each other in very less proportion.
A I, IV
B I, II
C II, III
D III, IV

Answer: I, IV
12 Which of the following is applicable for the solubility of gases in liquid.
A Increases with increase in temperature and pressure.
B Decreases with increase in temp and pressure.
C Increases with decrease in temp and increase in pressure.
D Decreases with decrease in temp and increase in pressure.

Answer: Increases with decrease in temp and increase in pressure.

Chapters

Assam Direct Recruitment Test Series

Teacher Eligibility Test

Assam Direct Recruitment Test Series