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Question

The volume of oxygen at STP required to burn 2.4 g of carbon completely is


A

1.12 L

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B

8.96L

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C

2.24 L

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D

4.48L

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Solution

The correct option is D

4.48L


C(s) +O2 (g) (g) CO2(g)

moles = 1mole 1mole 1mole

weight = 12gm 32gm 44gm

12gm of C require 1mole of O2

2.4gm of C will require 112×2.4 mole of O2

volume of 2.412 mole O2 at STP =22.4×2.412litre

4.48 litre


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