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21. Which statement is correct regarding ethane, ehene and ethyne? (NTSE West Bengal, Stage-I, 2014-15)
Ethyne is weakest acid and C-H bond length is longest
Ethyne is strongest acid C -H bond length is shortest
Ethane is strongest acid and C-H bond length is longest
Ethane is the strongest acid and C-H bond length is shortest
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22. Which of the following are isomers? (NTSE West Bengal, Stage-I, 2014-15)
Butane and Isobutene
Ethane and Ethene
Propane and Propyne
Butane and Isobutane
23. The IUPAC name of C6H5CN is (NTSE Bihar, Stage-I, 2014-15)
Phenyl Cyanide
Phenylacetonitrile
Benzene Cyanide
Benzonitrile
24. Which of the following aldehyde undergo Cannizzaro reaction? (NTSE Jharkhand, Stage-I, 2014-15)
C3H7CHO
C6H5CHO
CH3CHO
CH3CH2CHO
25. The main component of Bio gas is (NTSE Chhattisgarh, Stage-I, 2014-15)
Methane
Benzene
Ethylene
Ethane
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