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Chemistry

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

3
1
4
2

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Chemistry
The most electronegative element among the following is

bromine
oxygen
fluorine
sodium

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Chemistry
Acid rain is caused due to emission of which of the following in to the atmosphere ?

Ozone and carbon dioxide
Carbon dioxide and carbon monoxide
Oxides of nitrogen and sulphur
Carbon monoxide and nitrogen

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Chemistry
Bridgmanite is

A bridge on the river Thames
Earth’s most abundant minera
Name of a game
Name of a music

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Chemistry
Carborundum is another name of

Silicon carbide
Calcium carbide
Silicon oxide
Calcium oxide

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Chemistry
Nucleus of an atom consists of.

Proton
Neutron
Proton and Neutron
Electron, Proton and Neutron

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