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Question
The heat of combustion of ethylene is $$- 200$$ k J. If in its combustion 150$$\mathrm { kJ }$$ are evolved,the no. of moles of $$\mathrm { O } _ { 2 }$$ involved in the reaction would be
A
6
B
2.5
C
3
D
2.25
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Solution
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Correct option is A. 6
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