Question -
What is the n-factor / valency factor of H2CO3 ?
Options:
A .  1
B .  2
C .  Either a or b
D .  Neither a nor b
Answer: Option C : C In this case of H2CO3valency factor changes depending upon the reaction as the number of H+ ions replaced might vary depending on the extent of the reaction. H2CO3→H+ +HCO3− (n-factor =1) H2CO3→ 2H+ +CO32− (n-factor = 2)
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