1.Which one of the following is the softest?
A.sodium
B.iron
C.aluminum
D.lithium
2.Which have the maximum density?
A.Water
B.Benzene
C. Ice
D. Chloroform
3.Which one of the following gas is readily soluble in water at room temperature?
A.chlorine
B.nitrogen
C.ammonia
D.carbon dioxide
4.Which is also called Stranger Gas ?
A.Xenon
B.Neon
C.Argon
D.Nitrous oxide
5.Oil of vitriol is
A.nitric acid
B.sulphuric acid
C.hydrochloric acid
D.phosphoric acid
6.Which is used in preparation of dynamite ?
A.glycerol
B.ethyl alcohol
C.methyl alcohol
D.glycol
7.What is Calcium sulphate ?
A.epsom salt
B.blue vitriol
C.gypsum salt
D.potash alum
8.Bleaching action of chlorine is by
A.decomposition
B.hydrolysis
C.reduction
D.oxidation
9.Which metal is heaviest ?
A.osmium
B.mercury
C.iron
D.nickle
10.What is a mixture of potassium nitrate powdered charcoal and sulphur called?
A.paint
B.aluminium
C.brass
D.gun powder
