Question

Carbon and hydroben in an organic compound are detected as _______

• A. $MgC{O}_3,anhyd.CuS{O}_4$
• B. $CaC{O}_3,CuS{O}_4.5H_{2}O$
• C. $CaC{O}_3,Cu(OH{)}_2$
• D. $CaO,CaC{O}_3$

Answer 1

The correct option is B $CaC{O}_3,CuS{O}_4.5H_{2}O$

Carbon and hydrogen in an organic compound are detected as $CaC{O}_3,CuS{O}_4\cdot 5H_{2}O$
The organic compound is heated with dry copper oxide when C and H of the organic compound are oxidized to carbon dioxide and water.
Carbon dioxide is detected by passing it through lime to form calcium carbonate and the presence of hydrogen is detected by passing it through anhydrous copper sulphate (white) which turns blue $CuS{O}_4.5H_{2}O$ (hydrated copper sulphate).