Class 12 Chemistry MCQ Chapter 2 Solutions to each chapter is provided in the list so that you can easily browse through different chapters Class 12 Chemistry MCQ Chapter 2 Solutions and select need one. Class 12 Chemistry MCQ Chapter 2 Solutions Download PDF. AHSEC Chemistry Multiple Choice Class 12 Solutions.
Class 12 Chemistry MCQ Chapter 2 Solutions
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. HS 2nd Year Chemistry Objective Type Solutions are part of All Subject Solutions. Here we have given NCERT Class 12 Chemistry Multiple Choice Question and Answer, NCERT Class 12 Chemistry Objective Type Solutions for All Chapters, You can practice these here.
Solutions
Chapter: 2
| MCQ |
1. What is a solution?
(i) A mixture of a solute and a solvent.
(ii) A homogenous mixture of two or more components.
(iii) A compound formed by chemical reactions.
(iv) A solid mixed with liquid.
Ans: (ii)A homogenous mixture of two or more components.
2. If 2 gm of NaOH is present is 200 ml of its solution, its molarity will be
(i) 5.25
(ii) 0.5
(iii) 5.0
(iv) 0.25
Ans: (iv) 0.25
3. What does the term ‘homogeneous mixture’ mean?
(i) It has a uniform composition throughout.
(ii) It has different compositions in different parts.
(iii) It contains only solids.
(iv) It contains only liquids.
Ans: (i) It has a uniform composition throughout.
4. Mole fraction of glycerine C3H5(OH)3 in solution containing 36 g of water and 46 g of glycerine is
(i) 0.42
(ii) 0.30
(iii) 0.20
(iv) 0.46
Ans: (iii) 0.20
5. What is solubility?
(i) The maximum amount of solute that can dissolve in a solvent at a specified temperature.
(ii) The process of a solute reacting with a solvent.
(iii) The amount of solvent required to dissolve any solute.
(iv) The speed at which solutes dissolve.
Ans: (i)The maximum amount of solute that can dissolve in a solvent at a specified temperature.
6. Molality is expressed in
(i) Grams/litre.
(ii) Litres/moles.
(iii) Moles/litre.
(iv) Moles/kg.
Ans: (iv) Moles/kg.
7. The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows
(i) No deviation from Raoult’s Law.
(ii) Positive deviation from Raoult’s Law.
(iii) Negative deviation from Raoult’s Law.
(iv) That the solution is unsaturated.
Ans: (ii) Positive deviation from Raoult’s Law.
8. Which of the following liquid pairs will show positive deviation from Raoult’s law?
(i) Water-hydrochloric acid.
(ii) Water-nitric acid.
(iii) Acetone-chloroform.
(iv) Benzene-methanol.
Ans: (iv) Benzene-methanol.
9. What type of plot do we get when we graph the total vapour pressure against the mole fraction of one component in an ideal solution?
(i) Exponential.
(ii) Parabolic.
(iii) Linear.
(iv) Logarithmic.
Ans: (iii) Linear.
10. What is the vapour pressure of the solution prepared by mixing 25.5 g of CHCl₃ and 40 g of CH₂Cl₂ at 298 K?
(i) 200 mm Hg.
(ii) 415 mm Hg.
(iii) 347.9 mm Hg.
(iv) 250 mm Hg.
Ans: (iii) 347.9 mm Hg.
11. Increasing the temperature of an aqueous solution will cause.
(i) Decrease in molarity.
(ii) Decrease in molality.
(iii) Decrease in mole fraction.
(iv) Decrease in % (w / W).
Ans: (i) Decrease in molarity.
12. What percentage of helium is typically present in scuba diving tanks?
(i) 32.1%
(ii) 56.2%
(iii) 11.7%
(iv) 100%
Ans: (iii) 11.7%
13. What is the mole fraction of CHCl₃ in the liquid phase of the solution?
(i) 0.688
(ii) 0.312
(iii) 0.47
(iv) 0.213
Ans: (ii) 0.312
14. When mango is placed in aqueous solution of hydrochloric acid, it
(i) Shrinks.
(ii) Swells.
(iii) Bursts.
(iv) Nothing happens.
Ans: (i) Shrinks.
15. What happens to the solubility of gases in liquids as temperature increases?
(i) Solubility increases.
(ii) Solubility decreases.
(iii) Solubility remains the same.
(iv) Gases evaporate.
Ans: (ii) Solubility decreases.
