Class 12 Chemistry Chapter 2 Solutions MCQs | Class 12 Chemistry Chapter 2 Solutions Multiple Choice Questions (MCQs) and Answers

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Questions
1 Equal volumes of 0.1M AgNO3 and 0.2M NaCl are mixed. The concentration of NO3– ions in the mixture will be
A 0.1M
B 0.05M
C 0.2M
D 0.15M

Answer:0.05M
2 Which of the following should be done in order to prepare 0.4M NaCl starting with 100ml of 0.3M NaCl?
A add 5.85g of NaCl
B and 20ml water
C add 0.01 mol NaCl
D evaporate 10ml of water

Answer:add 0.01 mol NaCl
3 The volume of 0.025M H3PO4 required to neutralise 25ml of 0.03M Ca(OH)2 is
A 20ml
B 25ml
C 40ml
D 50ml

Answer: 20ml
4 The mole fraction of the solute in one molal aqueous solution is
A 0.009
B 0.018
C 0.027
D 0.036

Answer: 0.018
5 5 cm3 of acetone is added to 100 cm3 of water, the vapour pressure of water over the solution will be
A equal to the vapour pressure of pure water
B less than the vapour pressure of pure water
C greater than the vapour pressure of pure water
D very large

Answer: less than the vapour pressure of pure water
6 The density of a solution prepared by dissolving 129g of urea in 1000g of water is 1.15g/ml. The molarity of this solution is
A 1.78M
B 1.02M
C 2.05M
D 0.50M

Answer:2.05M
7 If at a certain temperature the vapour pressure of pure water is 25 mm Hg and that of a very dilute aqueous urea solution is 24.5 mm Hg, the molality of the solution is:
A 0.02
B 1.2
C 1.11
D 0.08

Answer:1.11
8 The relationship between osmotic pressure at 273K when 10g glucose (P1), 10g urea (P2) and 10g sucrose (P3) are dissolved in 250ml of water is
A P1 > P2 > P3
B P3 > P1 > P2
C P2 > P1 > P3
D P2 > P3 > P1

Answer:P2 > P1 > P3
9 Two liquids X and Y form an ideal solution. At 300K vapour pressure of the solution containing 1mol of X and 3 mol of Y is 550 mm Hg. At the same temperature, if 1 mol of Y is further added to this solution, the vapour pressure of the solution increases by 10 mm Hg. Vapour pressure of X and Y in the pure states will be respectively 500 and 600 200 and 300 Answer: (b)
A 300 and 400
B 400 and 600
C Both Frenkel and Schottky defects
D cation excess defect

Answer:400 and 600
10 Mixing up equal volumes of 0.1M NaOH and 0.1M CH3COOH yields a solution which is
A basic
B acidic
C neutral
D None

Answer:basic
11 Which of the following possesses physical state of solute and solvent are liquid and solid respectively ?
A solution of sugar in water
B zinc amalgam
C solution of Naphthelene in benzene
D brass

Answer:zinc amalgam
12 Which of the following alternative is correct for physical state of solute and solvent for a solution of camphor in N2 gas ?
A solid, gas
B solid, liquid
C gas, solid
D gas, gas

Answer: solid, gas
13 Which of the following is an example of solid solution ?
A interstitial compound of hydrogen and Pd
B WC
C Zn / Hg
D Given all

Answer: Given all
14 Which of the following pair of solution having same physical state of solute ?
A homogenous mixture of chloroform in N2 gas, solution of CO2 in water
B brass, sodium amalgam
C homogenous mixture of camphor in N2 gas, solution of H2 gas in Pd metal
D moist air, solution of ethanol in water

Answer: moist air, solution of ethanol in water
15 Which of the following pair of solution having same physical state of solvent ?
A homogenous mixture of chloroform in N2 gas, solution of CO2 in water
B brass, solution of salt in water
C homogenous mixture of camphor in N2 gas, moist air
D solution of H2 gas in Pd metal, solution of ethanol in water

Answer:homogenous mixture of camphor in N2 gas, moist air
16 Which of the following pair of solution having different physical state of solute ?
A homogenous mixture of chloroform in N2 gas, solution of CO2 in water
B brass, homogenous mixture of camphor in N2 gas
C sodium amalgam, moist air
D solution of H2 gas in Pd metal mixture of N2 and O2

Answer: homogenous mixture of chloroform in N2 gas, solution of CO2 in water
17 Which of the following pair of solution having different physical state of solvent ?
A homogenous mixture of N2 gas in chloroform, mixture of N2 and O2
B brass, solution of H2 gas in Pd metal
C sodium amalgam, solution of urea in water
D solution of CO2 in water, solution of Naphthelene in benzene

Answer: sodium amalgam, solution of urea in water
18 Which of the following compound possesses maximum solubility in water ?
A pentan – 1 - ol
B Pentane – 2, 3 – diol
C pentane – 1, 2, 3 – triol
D Pentane – 1, 2, 3, 4 – tetraol

Answer:Pentane – 1, 2, 3, 4 – tetraol
19 Which of the following given compound is least soluble in water ?
A Hexan – 1 – ol
B glycerol
C Propane – 1, 3 – diol
D ethylene glycol

Answer: Hexan – 1 – ol
20 To convert molarity into which of the following unit of concentration, does not require density of the solution ?
A molality
B normality
C mole-fraction
D % w/w

Answer: normality

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