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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