General Knowledge - General Science
Exercise :: General Science - Elements and Metals
41. |
What is laughing gas? |
A. |
Nitrous Oxide | B. |
Carbon monoxide | C. |
Sulphur dioxide | D. |
Hydrogen peroxide |
Answer: Option A
Explanation:
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42. |
Actinides are the elements with atomic numbers from |
A. |
97 to 104 | B. |
101 to 115 | C. |
89 to 103 | D. |
36 from 43 |
Answer: Option C
Explanation:
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43. |
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 |
Answer: Option B
Explanation:
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44. |
The filament of an electric bulb is made of |
A. |
tungsten | B. |
nichrome | C. |
graphite | D. |
iron |
Answer: Option A
Explanation:
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45. |
Diamond is an allotropic form of |
A. |
germanium | B. |
carbon | C. |
silicon | D. |
sulphur |
Answer: Option B
Explanation:
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