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Chemistry

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

1
3
4
2

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Chemistry
The coloured discharge tubes for advertisement mainly contain

Helium
Neon
Xenon
Argon

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Chemistry
Which of the following is used to denature ethanol ?

Methyl alcohol
Phenol
Propyl alcohol
Methane

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Chemistry
An emulsifier is an agent which

Stabilises an emulsion
Homogenises an emulsion
Accelerates the dispersion
Aids the flocculation of an emulsion

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Chemistry
Sour taste of lemon is due to the presence of which of the following ?

Oxalic acid
Acetic acid
Formic acid
Citric acid

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Chemistry
The polymerisation of which often following is used in manufacturing of polythene in industry ?

Styrene
Methane
Acetylene
Ethylene

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