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What percent of CO2 in air is just suffi...

What percent of `CO_2` in air is just sufficient to prevent loss in weight when `CaCO_3` is heated at `100^@C`?
(Equilibrium contant K for `CaCO_3(s) hArr CaO(s)+CO_2(g)` is 0.0095 atm at `100^@C`)

A

Greater than 0.95%

B

Greater than 0.29%

C

Greater than 0.71%

D

Greater than 0.05%

Text Solution

Verified by Experts

The correct Answer is:
A
`CaCO_(3)(s) Leftrightarrow CaO(s)+CO_(2)(g)`
`K_(p)=P_(CO_(2))` to prevent the loss of weight of `CaCO_(3)" % wt. of "CO_(2)" in air is "gt K_(p)`
`gt 0.0095
`i.e. gt 0.95%`
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