Petrol for aviation purpose must contain:
1.  Straight chain hydrocarbons
2.  Aromatic hydrocarbons
3.  Olefinic hydrocarbons
4.  Highly branched chain paraffins

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The solubility product of Hg2I2 is equal to:

 

 60%
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The number of atoms contained in one face-centred cubic unit cell of a monoatomic substance is:
1.  1
2.  2
3.  4
4.  6

 71%
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In the first order reaction, 75% of the reactant gets disappeared in 1.386 h. The rate constant of the reaction is:

 

 65%
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 65%
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the most basic element is:
1.  Fluorine
2.  Iodine
3.  Chlorine
4.  Bromine

 62%
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Propyne on passing through red hot copper tube forms:
1.  Benzene
2.  toluene
3.  mesitylene
4.  None of these

 58%
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Which one of the following is mainly responsible for the depletion of the ozone layer?

1.  Methane
2.  Carbon dioxide
3.  Water
4.  Chlorofluorocarbons

 81%
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On warming with silver powder, chloroform is converted into:
1.  Acetylene
2.  hexachloroethane
3.  1, 1, 2, 2-tetrachloroethane
4.  Ethylene

 56%
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