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81
Which gas comes out when water is mixed with bleaching powder?
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Answer: Option D
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82
Which one is known as the oil of vitriol?
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Answer: Option B
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83
. . . . . . . . is a halogen.
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Answer: Option D
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84
Which of the following gases has a pungent odor?
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Answer: Option A
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85
Lead is soluble in
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Answer: Option D
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86
Which one of the following is not used as fertiliser?
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Answer: Option B
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87
Rare gases are generally chemically inert because
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Answer: Option C
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88
Graphene is
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Answer: Option B
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89
What is the commercial process of production of ammonia?
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Answer: Option D
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90
Which one of the following is called 'syngas'?
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Answer: Option C
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