1. Which of the following alloys is used for making magnets ?
(A) Duralumin
(B) Stainless Steel
(C) Alnico
(D) Magnelium
2. The gas usually filled in electric bulb is —
(A) Hydrogen
(B) Oxygen
(C) Nitrogen
(D) Carbon di-oxide
3. The gases used in different types of welding would include —
(A) Oxygen & Hydrogen
(B) Oxygen, acetylene & argon
(C) Oxygen & acetylene
(D) Oxygen, hydrogen & nitrogen
4. Which of the following is used in making smoke bombs ?
(A) Sulphur
(B) Phosphorus
(C) Hydrogen
(D) Carbon
5. Which of the following substance is a bad conductor of electricity but a good conductor of heat?
(A) Asbestos
(B) Celluloid
(C) Purspecks
(D) Mica
6. The charcoal used to decolourise raw sugar is —
(A) Animal charcoal
(B) Sugar charcoal
(C) Cocoanut charcoal
(D) Wood charcoal
7. Tetraethyl lead is used as —
(A) Mosquito repellent
(B) Pain Killer
(C) Fire extinguisher
(D) Petrol additive
8. Which of the following is used as a material for making protective windows in space probes ?
(A) Steel
(B) Graphite
(C) Tungsten
(D) Diamond
9. Which of the following is used in beauty parlours for hair setting ?
(A) Phosphorus
(B) Sulphur
(C) Chlorine
(D) Silicon
10. The chemial name of Uria is —
(A) Aneurin
(B) Chloroetane
(C) Carbamide
(D) None of these
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