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61
Which one of the following is the purest form of Carbon?
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Answer: Option D
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62
The group . . . . . . . . contains inert gases.
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Answer: Option B
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63
Diamond is a
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Answer: Option C
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64
Buckminster fullerene is an allotrope of
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Answer: Option D
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65
What kind of a resource is water?
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Answer: Option D
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66
Soda-acid is the salt used in fire extinguishers is-
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Answer: Option A
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67
Consider the following statements
1. The non-metals are either solids or gases except brominewhich is a liquid.
2. Iodine is a non-metal but it is lustrous.
3. Diamond, an allotrope of carbon, is the hardest natural substance.
Which of the statements given above are correct?
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Answer: Option C
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68
Which of the following gases is used to prevent foods or chips from being oxidized?
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Answer: Option D
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69
The electronic configurations of the four elements are given below. Which of the following would be more electro negative?
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Answer: Option C
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70
Inert gases are
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Answer: Option C
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