CBSE Class 12 Solutions Multiple Choice Questions with Answers. MCQ Questions Class 12 Solutions with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Solutions MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Solutions with Answers - Set - 2
Question 1:
An aqueous solution freezes out -0.186°C (Kf = 1.86°, kb = 0.512). What is the elevation in boiling point?
(a) 0.186
(b) 0 .512
(c) 0.86
(d) 0.0512
Correct Answer – (C)
Question 2 :
Which of the following modes of expressing concentration is independent of temperature?
(a) Molarity
(b) Normality
(c) Formality
(d) Molality
Correct Answer – (D)
Question 3 :
The law stating that the relative lowering of vapour pressure is equal to the mole fraction of a solute in the solution is known as
(a) Henry’s law
(b) Van’t Hoff, Law
(c) Raoult’s law
(d) Ostwald’s dilution law
Correct Answer – (C)
Question 4 :
Which of the following salt will have same value of Vant Hoff’s factor (i) as that of K4[Fe (CN)6]
(a) Al2(SO4)3
(b) NaCl
(c) Al(NO3)3
(d) Na2SO4
Correct Answer – (A)
Question 5 :
The solution containing 6.8 g of non-ionic solute in 100 g of water was found to freeze at -0.93°C. If Kf for water is 1.86, the mol. mass of solute is
(a) 13.6
(b) 68
(c) 34
(d) 136.
Correct Answer – (D)
MCQ Questions Class 12 Solutions with Answers
Question 6 :
A 500 g tooth paste sample has 0.2 g fluoride concentration. What is the concentration of fluorine in terms of ppm level?
(a) 250
(b) 200
(c) 400
(d) 1000
Correct Answer – (A)
Question 7 :
Azeotropic mixture of HCl and H2O has
(a) 48% HCl
(b) 22.2% HCl
(c) 36% HCl
(d) 20.2% HCl
Correct Answer – (D)
Question 8 :
120 g of urea is present in 5 L of solution, the active mass of urea is
(a) 0.2
(b) 0.06
(c) 0.4
(d) 0.8
Correct Answer – (C)
Question 9 :
In case of electrolyte which dissociates in solution the Van’t Hoff’s factor, i is
(a) > 1
(b) < 1
(c) = 1
(d) = 0
Correct Answer – (A)
Question 10 :
The molal freezing point constant for water is 1.86° CM. The freezing point of 0.1 m NaCl solution is expected to be
(a) 13.6
(b) 68
(c) 34
(d) 136
Correct Answer – (C)
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