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Identify an alkane from the moles of oxygen needed to burn one mole of it

This type of question, asked 2 times: 2 Apr 2026 S1, 6 Apr 2026 S2. All 2 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    2 Apr 2026 S1

    48
    One mole of an alkane (x) requires 8 mole oxygen for complete combustion. Sum of number of carbon and hydrogen atoms in the alkane ( x ) is____\_\_\_\_ .

  2. Question 2

    6 Apr 2026 S2

    47
    An alkane (Y) requires 8 moles of oxygen for complete combustion and on chlorination with Cl2/hv{Cl}_{2}/hv, (Y) gives only one monochlorinated product (Z). The total number of primary carbon atoms in (Y) is ____\_\_\_\_ .