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71
The soil in which insectivorous plants grow in deficient in
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Answer: Option C
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72
Which one of the following is a non-metallic mineral?
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Answer: Option B
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73
The hardest natural substance is-
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Answer: Option A
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74
Fuel used for rocket propulsion is a mixture of
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Answer: Option C
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75
Which one of the following elements exist in liquid state at room temperature?
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Answer: Option C
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76
Matchsticks are made up of . . . . . . . .
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Answer: Option B
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77
Which of the following gases is popular as laughing gas?
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Answer: Option C
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78
Property of attracting electrons by halogen atoms is known as . . . . . . . .
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Answer: Option B
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79
Which of the following inert gas has only two electrons in its outer most cell?
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Answer: Option A
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80
Being light and non-inflammable, . . . . . . . . gas is used to blow balloons.
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Answer: Option C
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