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Chemistry

Chemistry
The number of hydrogen bonds between guanine and cytosine in DNA is

3
2
1
4

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Chemistry
Which of the following metals form an amalgam with other metals ?

Zinc
Tin
Lead
Mercury

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Chemistry
The natural resource, known as black gold is

Tin
Platinum
Lead
Coal

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Chemistry
Which of the following is used as a preservative to protect processed food?

BHT
Sodium sulphate
Sodium metabisulphite
Saccharin

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Chemistry
Which of the following is not a nitrogenous fertilizer ?

CaCN2
Urea
Ca(CN)2
NH4NO3

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Chemistry
Quartz is made of

Sodium Silicate
Calcium Sulphate
Calcium Silicate
Sodium Sulphate

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