KVPY SA Exam 2015 Question Paper

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Question : 73 of 80

Marks: +1, -0

When 22.4 L of

C_4H_8

at STP is burnt completely, 89.6 L of

CO_ 2

gas at STP and 72 g of water are produced. The volume of the oxygen gas at STP consumed in the reaction is closest to

89.6 L
112 L
134.4 L
22.4 L

Solution:

C_4H_8(g) + 6O_2(g) \ {––––▸}\ 4CO_2(g) + 4H_2O(g)

\table {22.4L}/22.4 ,89.6 L ,72 gm;= 1 \mole,= 4 \mole,= 4\mole

n _{O_2}

consumed = 6
∴

V_ {O_2}= 6 × 22.4 = 134.4 L

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