Will C$C{{l}_{4}}$ give white ppt. of AgCl on heating it with silver nitrate ? Give reason for your answer



CC$C{{l}{4}}$ will not give a white ppt. of AgCl when it is treated with a solution of silver nitrate. It is because CC$C{{l}{4}}$ is a covalent compound and hence does not ionise to give CF ions which is the essential requirement for AgNC${{O}{3}}$ test.
Why is a solution of potassium hydroxide used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound ? Carbon dioxide (C${{O}
{2}}$) is slightly acidic in nature. Hence KOH which is a strong alkali dissolves C${{O}{3}}$ evolved from the compound containing carbon and reacts with it to form ${{lK}{2}}$C${{O}{3}}$. Increase in the weight of potash bulbs will give the weight of C$C{{O}{2}}$ evolved.