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91
What is the mass number of deuterium?
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Answer: Option A
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92
In writing Pencil . . . . . . . . is used
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Answer: Option D
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93
Which of the following is a mono-atomic?
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Answer: Option B
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94
Which group contains elements that are colourless, tasteless and odorless gases?
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Answer: Option B
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95
Which one of the following forms of carbon acts as a reducing agent in metallurgy?
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Answer: Option A
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96
Which of the following atoms is multi-atomic?
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Answer: Option D
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97
Which of these gases is called stranger gas?
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Answer: Option A
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98
Chlorine gas is used in the manufacture of which of the following:
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Answer: Option C
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99
Nitric acid does not react with
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Answer: Option A
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100
Nitrification is the biological process of converting
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Answer: Option C
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