A. Nitrous Oxide
B. Carbon monoxide
C. Sulphur dioxide
D. Hydrogen peroxide
2. Actinides are the elements with atomic numbers from
A. 97 to 104
B. 101 to 115
C. 89 to 103
D. 36 from 43
3. The two elements that are frequently used for making transistors are
A. boron and aluminium
B. silicon and germanium
C. iridium and tungsten
D. niobium and columbium
4. The filament of an electric bulb is made of
A. tungsten
B. nichrome
C. graphite
D. iron
5. Diamond is an allotropic form of
A. germanium
B. carbon
C. silicon
D. sulphur
ANSWERS:
1. Answer: Option A
2. Answer: Option C
3. Answer: Option B
4. Answer: Option A
5. Answer: Option B
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