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46. The correct order of acid strength is (NTSE Odisha, Stage-I, 2015-16)
HCOOH > C6H5COOH > CH3COOH
C6H5COOH > HCOOH > CH3COOH
CH3COOH > HCOOH > C6H5COOH
C6H5COOH > CH3COOH > HCOOH
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47. Reaction of water with aluminium carbide gives a colourless gas. The gas is (NTSE Odisha, Stage-I, 2015-16)
Methane
Acetylene
Ethane
Propane
48. In the structure of Napthalene the difference between the number of sigma bonds and the number of pi bond is (NTSE West Bengal, Stage-I, 2015-16)
6
7
12
14
49. Which of the following pair of compounds represent functional group isomerism? (NTSE West Bengal, Stage-I, 2015-16)
Diethyl ether and ethanol
Dimethyl ether and ethanol
Acetadehyde and Propanal
Isobutane and Butane.
50. A mixture of CH4 , C2H4 and C2H2 is passedthrough a basic copper (I) chloride solution. Which gas/gases will come out? (NTSE West Bengal, Stage-I, 2015-16)
Whole mixture
CH4 and C2H2
CH4 and C2H4
C2H4
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