First slide

Alkynes

Question

The amount of oxygen required for the complete combustion of 1 mole of Acetylene is?

Easy

A

80g
B

160g
C

40g
D

20g

Solution

${2 C}_{2} H_{2} {+5 O}_{2} \overset{}{\to} {4 CO}_{2} {+2 H}_{2} O$
For the combustion of 2 mole of Acetylene 5 mole of oxygen required. For the combustion of 1 mole of Acetylene 2.5 moles of oxygen required. Molecular weight is 32.
2.5 moles of oxygen weight is 2.5*32=80g

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