1.The chemical used as a fixer in photography is
Sodium thiosulphate
2. any one substances undergoes chemical change on heating ?
Lead Nitrate
3. The gas used to extinguish fire is
Carbon dioxide
4. The most malleable metal is
Pain Killer
5.A mixture of iron filings and sand can be separated by
Magnetic Separation
6. Polythene is industrially prepared by the polymerization of
Ethylene
7. ------- metals can displace zinc from a solution of zinc sulphate ?
Magnetism
8.Glass is made from the mixture of
Sand and silicates
9.In which process, Vanadium Pentoxide is used as a catalyst ?
Contact process
10.---------- metals can displace hydrogen from dilute acids ?
Zinc
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