The structures 
represents:
1. Chain isomerism
2. Position isomerism
3. Chain as well as position isomerism
4. Functional isomerism
The structures represents:
represents:1. Chain isomerism
2. Position isomerism
3. Chain as well as position isomerism
4. Functional isomerism
2. Position isomerism
3. Chain as well as position isomerism
4. Functional isomerism
53%
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Petrol for aviation purpose must contain:
1. Straight chain hydrocarbons
2. Aromatic hydrocarbons
3. Olefinic hydrocarbons
4. Highly branched chain paraffins
2. Aromatic hydrocarbons
3. Olefinic hydrocarbons
4. Highly branched chain paraffins
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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
2. 2
3. 4
4. 6
71%
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Propyne on passing through red hot copper tube forms:
1. Benzene
2. toluene
3. mesitylene
4. None of these
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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