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71
Chromatography is based on which of the following?
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Answer: Option C
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72
At constant temperature, the product of pressure and volume of a given amount of a gas is constant. This is
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Answer: Option C
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73
Which one of the following elements exists in liquid state at room temperature?
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Answer: Option A
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74
A balloon filled with ethylene is pricked with a sharp point and quickly dropped in a tank of H2 gas under identical conditions. After a while the balloon will have
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Answer: Option B
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75
Which one of the following is called Dry Ice?
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Answer: Option A
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76
A balloon filled with helium rises in air because
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Answer: Option C
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77
Iodine can be separated from a mixture of iodine and potassium chloride by
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Answer: Option C
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78
An emulsion is a colloid of
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Answer: Option B
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79
Ink is prepared from
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Answer: Option A
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80
According to which one of the following laws it is indicated that when two or more gases react with one another, their volumes bear a simple ratio?
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Answer: Option D
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