CSIR Net Question Papers Chemistry. We covered all the CSIR Net Question Papers Chemistry MCQs in this post for free so that you can practice well for the exam.
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CSIR Net Question Papers Chemistry Objective for Students
Chalk and marble are different forms of:
(a) Calcium hydrogen carbonate
(b) Calcium carbonate
(c) Calcium acetate
(d) Sodium carbonate
Option b – Calcium carbonate
At nearly 70°C, sodium bicarbonate shows the property of gradually decomposing, which makes it usable in bakery products. The product of decomposition responsible for this use of sodium bicarbonate is:
(a) Carbon dioxide
(b) Hydrogen
(c) Water vapor
(d) Oxygen
Option a – Carbon dioxide
Which one of the following statements regarding Bleaching powder and D.D.T is correct?
(a) Both are inorganic compounds
(b) Both are organic compounds
(c) Both contain chlorine
(d) Both contain calcium
Option c – Both contain chlorine
Vinegar is also known as:
(a) Ethanoic acid
(b) Nitric acid
(c) Sulphuric acid
(d) Tartaric acid
Option a – Ethanoic acid
When air is blown from the mouth into a test tube containing limewater, the limewater turns milky. This is due to the presence of:
(a) Water vapor
(b) Oxygen
(c) Carbon dioxide
(d) Carbon monoxide
Option c – Carbon dioxide
Silver articles become black after some time when exposed to air because:
(a) Silver gets oxidized to silver oxide
(b) Silver reacts with moist carbon dioxide in the air to form silver carbonate
(c) Silver reacts with sulfur in the air to form a coating of silver sulfide
(d) Silver reacts with nitrogen oxides in the air to form silver nitrate
Option c – Silver reacts with sulfur in the air to form a coating of silver sulfide
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