Question

24 g of carbon is burnt in presence of air the gas produced form 1M dibasic acid when passed through 1 L water then correct statement is?
(1)12g C react to form CO2
(2)8g C react to form CO
(3)16g C react to form CO
(4)9g C react to form CO2​

Answer 1

answer : option (1) 12g C react to form CO2

explanation : in chemical reaction, C + O2 → CO2

1 mole of carbon reacts to form 1 mole of carbon dioxide.

and this 1 mole of carbon dioxide is passed through 1L of water , produce 1M of H2CO3 dibasic acid.

but in question,

mass of carbon given = 24g

then, it form 2 moles of carbon dioxide

and 2 moles carbon dioxide form 2 mole of H2CO3 dibasic acid. or 2M dibasic acid when passed through 1L water.

hence, it is clear that to form 1M dibasic acid, only 12g carbon is required to burn in the presence of air.

so, option(1) is correct.