Chemistry
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