JAC Class 12 Chemistry Question Paper 2019 with Solution

About this paper

This is the Jharkhand Academic Council (JAC) Class 12 Chemistry paper from the 2019 board examination, with an answer under each question. It carries 70 marks over 34 questions: eight one-mark multiple-choice items, seven one-mark very short answers, eight two-mark and eight three-mark short answers, and three five-mark long answers. One long answer uses Raoult's law for the vapour pressure at 293 K of a solution of 25 g of glucose in 450 g of water, the pure vapour pressure being given as 17.535 mm Hg, with structures of xenon, phosphorus and iodine compounds as the alternative. The other long answers are the Ostwald process for nitric acid and notes on aldol condensation, the Sandmeyer reaction and the Stephen reaction. Time is not printed.

Exam

JAC Class 12

Subject

Chemistry

Year

2019

Maximum marks

70

Questions

34

Pages

4

Answers included

Yes

Paper pattern

• Multiple Choice Type Questions

  8 marks

  Questions 1–8, one mark each

• Very Short Answer Type Questions

  7 marks

  Questions 9–15, one mark each

• Short Answer Type-I

  16 marks

  Questions 16–23, two marks each

• Short Answer Type-II

  24 marks

  Questions 24–31, three marks each

• Long Answer Type

  15 marks

  Questions 32–34, five marks each, each with an Or alternative

Topics covered

• Solid state
• Solutions and Raoult's law
• Electrochemistry
• Chemical kinetics
• Surface chemistry
• General principles of isolation of metals
• p-Block elements
• d- and f-block elements and lanthanoids
• Coordination compounds
• Haloalkanes and alcohols
• Aldehydes, ketones and amines
• Biomolecules, polymers and chemistry in everyday life

Questions from this paper

1. Calculate the overall order of a reaction which has the rate expression Rate = k[A][B].
2. Beri-beri occurs due to the deficiency of which vitamin?
3. Giving examples, differentiate between roasting and calcination.
4. What are the expected products of the hydrolysis of lactose?
5. The vapour pressure of water at 293 K is 17.535 mm Hg. Calculate the vapour pressure when 25 g of glucose is dissolved in 450 g of water.
6. Give the principle of the manufacture of nitric acid by the Ostwald process. How does concentrated nitric acid react with carbon and with iodine?