General Knowledge - General Science
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Exercise"Life is like riding a bicycle. To keep your balance you must keep moving."
- Albert Einstein
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| 46. |
In fireworks, the green flame is produced because of |
| A. |
sodium | B. |
barium | | C. |
mercury | D. |
potassium |
Answer: Option A
Explanation:
No answer description available for this question. Let us discuss.
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| 47. |
Permanent hardness of water can be removed by adding |
| A. |
chlorine | | B. |
washing soda | | C. |
potassium permanganate | | D. |
bleaching powder |
Answer: Option E
Explanation:
No answer description available for this question. Let us discuss.
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| 48. |
Marsh gas is |
| A. |
nitrogen | B. |
ethane | | C. |
methane | D. |
hydrogen |
Answer: Option A
Explanation:
No answer description available for this question. Let us discuss.
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| 49. |
LPG consists of mainly |
| A. |
methane, ethane and hexane | | B. |
ethane, hexane and nonane | | C. |
methane, hexane and nonane | | D. |
methane, butane and propane |
Answer: Option E
Explanation:
No answer description available for this question. Let us discuss.
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| 50. |
Air is a/an |
| A. |
compound | B. |
element | | C. |
electrolyte | D. |
mixture |
Answer: Option E
Explanation:
No answer description available for this question. Let us discuss.
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