CBSE 2016 Chemistry Question Paper for Class 12

About this paper

This is the CBSE Class 12 Chemistry (Theory) question paper code 56/1/C, Series ONS, Set 1, from the 2016 board examination. It carries 70 marks over three hours and has 26 compulsory questions: five one-mark questions, five two-mark questions, twelve three-mark questions, one four-mark value-based question and three five-mark long answers. The value-based question follows an office worker whose junk-food habit leads to acidity, and asks about antacids. Internal choices are given in one two-mark question, one three-mark question and all three long answers, and one long-answer choice is built around the 3d transition series from Sc to Zn. 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

2016

Paper code

56/1/C

Maximum marks

70

Time allowed

3 hours + 15 min reading

Questions

26

Pages

17

Answers included

No, questions only

Paper pattern

• Questions 1–5

  5 marks

  Very short answer questions, one mark each

• Questions 6–10

  10 marks

  Short answer questions, two marks each; internal choice in one

• Questions 11–22

  36 marks

  Short answer questions, three marks each; internal choice in one

• Question 23

  4 marks

  Value-based question

• Questions 24–26

  15 marks

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

Topics covered

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

Questions from this paper

1. Give an example each of a molecular solid and an ionic solid.
2. An element crystallises in a b.c.c. lattice with a cell edge of 500 pm. The density of the element is 7.5 g cm⁻³. How many atoms are present in 300 g of the element?
3. Calculate the boiling point of the solution when 4 g of MgSO₄ (M = 120 g mol⁻¹) is dissolved in 100 g of water, assuming MgSO₄ undergoes complete ionisation. (Kb for water = 0.52 K kg mol⁻¹)
4. What is the role of cryolite in the extraction of aluminium?
5. Write the structural difference between starch and cellulose.
6. The conductivity of a 0.001 mol L⁻¹ solution of CH₃COOH is 3.905 × 10⁻⁵ S cm⁻¹. Calculate its molar conductivity and degree of dissociation (α), given λ°(H⁺) = 349.6 S cm² mol⁻¹ and λ°(CH₃COO⁻) = 40.9 S cm² mol⁻¹.