The octane number of zero is assigned to
A 2-methyl octane
B n-heptane
C iso-octane
D 3-methyl octane
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The gas used for artificial ripening of green fruit is
A Ethylene
B Ethane
C Carbon dioxide
D Acetylene
The reaction which converts sugar solution into alcohol is an example of
A. Saponification
B. Hydrogenation
C. Fermentation
D. Hydrolysis
The chief constituent of gobar (cow dung) gas is
A. Ethane
B. Methane
C. Hydrogen
D. Carbon dioxide
What does happen when water is condensed into ice?
A. Heat is absorbed
B. Heat is released
C. Quantity of heat remains unchanged D. None of these