CBSE 2014 Chemistry Question Paper for Class 12

About this paper

This is the CBSE Class 12 Chemistry (Theory) question paper code 56/2, Series OSR, from the 2014 board examination, printed in both Hindi and English. It carries 70 marks over three hours and has 30 compulsory questions: eight one-mark questions, ten two-mark questions, nine three-mark questions and three five-mark long answers. One three-mark question is value-based, about a doctor's health camp for farmers that uncovers cancer from pesticide exposure. Internal choices are given in one three-mark question and all three five-mark questions. Log tables may be used, but calculators are not allowed. This copy has the questions only, without answers.

Exam

CBSE Class 12

Subject

Chemistry

Year

2014

Paper code

56/2

Maximum marks

70

Time allowed

3 hours + 15 min reading

Questions

30

Pages

16

Answers included

No, questions only

Paper pattern

• Questions 1–8

  8 marks

  Very short answer questions, one mark each

• Questions 9–18

  20 marks

  Short answer questions, two marks each

• Questions 19–27

  27 marks

  Short answer questions, three marks each, including one value-based question; internal choice in one

• Questions 28–30

  15 marks

  Long answer questions, five marks each, each with an internal choice

Topics covered

• Solid state
• Solutions and colligative properties
• Electrochemistry
• Chemical kinetics
• Surface chemistry and emulsions
• Isolation of elements
• p-Block elements
• d- and f-Block elements
• Coordination compounds
• Haloalkanes, alcohols and phenols
• Aldehydes, ketones, carboxylic acids and amines
• Biomolecules, polymers and chemistry in everyday life

Questions from this paper

1. Why is adsorption always exothermic?
2. An element with density 2.8 g cm⁻³ forms an f.c.c. unit cell with edge length 4 × 10⁻⁸ cm. Calculate the molar mass of the element. (Given: Nₐ = 6.022 × 10²³ mol⁻¹)
3. Calculate ΔrG° for the reaction Mg(s) + Cu²⁺(aq) → Mg²⁺(aq) + Cu(s), given E°cell = +2.71 V and 1 F = 96500 C mol⁻¹.
4. What are emulsions? What are their different types? Give one example of each type.
5. Why is [NiCl₄]²⁻ paramagnetic but [Ni(CO)₄] diamagnetic? (At. no.: Ni = 28)
6. A solution containing 15 g urea (molar mass = 60 g mol⁻¹) per litre is isotonic with a solution of glucose (molar mass = 180 g mol⁻¹) in water. Calculate the mass of glucose present in one litre of its solution.