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91
Solid substance commonly known as 'dry ice':
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Answer: Option C
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92
Which of the following is not an inert/nobel gas?
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Answer: Option A
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93
In . . . . . . . . allotrope of carbon , the carbon atoms are arranged in the shape of a football.
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Answer: Option C
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94
. . . . . . . . is the greatest source of halogens.
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Answer: Option D
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95
Which of the following is the only non-metallic substance present in liquid state at room temperature?
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Answer: Option D
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96
. . . . . . . . gas is also produced by reaction of acids upon metals.
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Answer: Option B
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97
In the modern periodic table, what are the basic elements of group 18 (Except helium all other than having eight electrons in their outermost orbit)?
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Answer: Option C
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98
. . . . . . . . is the least reactive element of group-17.
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Answer: Option D
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99
What is the first element that was chemically discovered by the Hanning brand?
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Answer: Option D
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100
Which of the following gases makes up 78% of our atmosphere and also a part of many element essential to life?
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Answer: Option C
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