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1-Which metal is present in Sindur (the sacred material of Hindus) ?
Answer: Lead

2-Which is the Alkali metal used in photovoltaic cell ?
Answer: Cesium

3-Which is the only liquid nonmetal ?
Answer: Bromine

4-The first metal used by man was _____ ?
Answer: Copper

5- Which metal is present in Insulin ?
Answer: Zinc

6-Which metal is present in chlorophyll ?
Answer: Magnesium

7-Which metal is present in haemoglobin ?
Answer: Iron

8-Who is regarded as father of modern chemistry ? – Lavoisier

9-Citric acid is present in lemon.

10-The term PVC used in the plastic industry stands for polyvinyl chloride

11-Oil of vitriol is sulphuric acid

12-What is Calcium sulphate ? -gypsum salt

13-Gun Powder is the mixture of potassium nitrate powdered charcoal and sulphur.

14-Nail polish remover contains acetone

15-The chemical used as a fixer in photography is sodium thiosulphate

16-Water drops are spherical because of surface tension

17-The oxide of Nitrogen used in medicine as anaesthetic is Nitrogen pentoxide

18-Aspirin is acetyl salicylic acid

19-The metal that is used as a catalyst in the hydrogenation of oils is Ni

20-The most abundant element in the earth’s crust is Oxygen

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