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Question

# If the weight ratio of C and O2 present is 1:2 and both of reactants completely consume and form CO and CO2. We will obtain a gaseous mixture of CO and CO2 in the ratio:

A
11:7
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B
7:11
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C
1:1
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D
1:2
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Solution

## The correct option is C 7:11Cw+O22w→COx+CO2yBy applying the concept of principle of Atom Conservation (POAC) to carbon w12=x28+y44w3=x7+y11 ......(1)By applying the concept of principle of atom conservation (POAC) to oxygen 2×2w32=x28+2×y44w4=x14+y11 ......(2)Hence, 3y11+3x7=4x14+4y113x7−2x7=y11x7=y11,xy=7:11. This is the ratio of CO and CO2 in the gaseous mixture.

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