Q.

The following reaction takes place in the bodyCO2 + H2O ⇌  H2CO3  ⇌  H+  +  HCO3-.  If  CO2 escapes from the system

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a

pH decreases

b

H+ will decrease

c

H2CO3 remains the same

d

forward reaction will be promoted

answer is B.

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Detailed Solution

If CO2 escapes from the system, the equilibrium favours backward reaction according to Lechatlier principle.H2O + CO2 ⇌  H2CO3  ⇌  H+  +  HCO3- ∴   H+  will decrease
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The following reaction takes place in the bodyCO2 + H2O ⇌  H2CO3  ⇌  H+  +  HCO3-.  If  CO2 escapes from the system