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Q.

The molar heat of combustion, i.e. the heat given out when on mole of the alcolhol is completely burnt in oxygen, of a number of alcohols is given below:
How many carbon and hydrogen atoms would there be in an alcohol that has a molar heat of combustion of 3900 kJ/mol?

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a

Number of carbon atoms : 6 Number of hydrogen atoms : 13

b

Number of carbon atoms : 5, Number of hydrogen atoms : 11

c

Number of carbon atoms : 5, Number of hydrogen atoms : 12

d

Number of carbon atoms : 6, Number of hydrogen atoms : 12

answer is B.

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Detailed Solution

Number of carbon atoms : 5, Number of hydrogen atoms : 12. i.e $C_{5} H_{11} O H$

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The molar heat of combustion, i.e. the heat given out when on mole of the alcolhol is completely burnt in oxygen, of a number of alcohols is given below:How many carbon and hydrogen atoms would there be in an alcohol that has a molar heat of combustion of 3900 kJ/mol?