Bihar Board - Class 12 - Chemistry - Chapter 2: Solutions Multiple Choice Questions ( MCQs)

The multiple choice questions for Chapter 2: Solutions of Class 12 Chemistry are provided here in English. These questions are based on the NCERT curriculum for Class 12. They are designed to help students evaluate their understanding of the key concepts covered in the chapter. These multiple choice questions will be useful not only for the Class 12 board exams but also for entrance exams like NEET. The questions for Bihar Board Class 12 Chemistry, Chapter 2: Solutions, have been prepared by expert teachers at Vidyakul.   

                                         Multiple Choice Question

1. Atomic mass is equal to 

(A) number of electrons of an atom
(B) sum of the numbers of electrons and protons of an atom
(C) sum of the numbers of neutrons and protons of an atom
(D) none of these

Answer ⇒ (B)sum of the numbers of electrons and protons of an atom

2. How much oxygen is dissolved in 100 ml water at 298 K if partial pressure of oxygen is 0.5 atm and KH =1.4 10-3 mol/L/atm ?

(A) 22.4 mg
(B) 22.4 g
(C) 2.24 g
(D) 2.24 mg

Answer ⇒ (D) 2.24 mg

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3. The law which indicates the relationship between solubility of a gas in liquid and pressure is

(A) Raoult’s law
(B) Henry’s law
(C) Lowering of vapor pressure
(D) Van’t Hoff law

Answer ⇒ (B)Henry’s law

4. Partial pressure of a solution component is directly proportional to its mole fraction. This is known as

(A) Henry’s law
(B) Raoult’s law
(C) Distribution law
(D) Ostawald’s dilution law

Answer ⇒ (B) Raoult’s law

5. A plant cell shrinks when it is kept in a

(A) hypotonic solution
(B) hypertonic solution
(C) isotonic solution
(D) pure water

Answer ⇒ (B)hypertonic solution

6. The relative lowering in vapour pressure is proportional to the ratio of number of

(A) solute molecules to solvent molecules
(B) solvent molecules to solute molecules
(C) solute molecules to the total number of molecules in solution
(D) solvent molecules to the total number of molecules in solution

Answer ⇒ (C)solute molecules to the total number of molecules in solution

7. A solution containing 10.2 g glycerine per litre is isotonic with a 2% solution of glucose. What is the molecular mass of glycerine ?

(A) 91.8 g
(B) 1198 g
(C) 83.9 g
(D) 890.3 g

Answer ⇒ (A)91.8 g

8. What weight of glycerol should be added to 606 g of water in order to lower its freezing point by 10 C ?

(A) 496 g
(B) 2.97 g
(C) 310 g
(D) 426 g

Answer ⇒ (B)2.97 g

9. The osmotic pressure of a solution can be increased by

(A) increasing the volume
(B) increasing the number of solute molecules
(C) decreasing the temperature
(D) removing semipermeable membrane

Answer ⇒ (B) increasing the number of solute molecules

10. what will be the degree of dissociation of 0.1 M Mg(NO3)2 solution if van’tHoff factor is 274 ?

(A) 75 %
(B) 87 %
(C) 100 %
(D) 92 %