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How many moles of \mathrm{H_2O} are produced on combustion of 1 mole of \mathrm{C_nH_{2n+2}} ?

Option: 1

n


Option: 2

n+1


Option: 3

2n


Option: 4

2n+2


Answers (1)

best_answer

As we have learnt,

The combustion of all hydrocarbons produce \mathrm{H_2O} and \mathrm{CO_2}

When a general hydrocarbon undergoes combustion, the balanced reaction is given as 

\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}+2}+\left(\frac{3 \mathrm{n}+1}{2}\right) \mathrm{O}_{2} \rightarrow \mathrm{nCO}_{2}+(\mathrm{n}+1) \mathrm{H}_{2} \mathrm{O}

Hence, the combustion of 1 mole of the hydrocarbons produces (n+1) moles of  \mathrm{H_2O}

Therefore, the correct answer is Option (2)

Posted by

Sanket Gandhi

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