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When 10 g of 90% pure limestone is heate...

When 10 g of 90% pure limestone is heated, the approximate volume (in L) of `CO_2` liberated at STP is

A

`4.4`

B

`2.0`

C

`4.0`

D

`22.4`

Text Solution

Verified by Experts

The correct Answer is:
B
On heating 100g `Ca CO_3`, it liberates 22.4 litres of `CO_2` at STP condition.
`CaCO_3 overset(B)(to) CaO + CO_2`
10 g of 90% pure limestone `=(10xx90)/(100)`
`9g` of pure `Ca CO_3`
`100g to 22.4`
`9g to ?`
Required volume `= (9xx22.4)/(100)=2.016L ~~ 2` litres
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