How will you detect the presence of carbon and hydrogen in an organic

1.	How will you detect the presence of carbon and hydrogen in an organic compound?
Answer» SOLUTION :Copper oxide test: (i) The organic substance is mixed with three times its weight of dry copper oxide by grinding. The mixture is placed in a hard glass test tube fitted with a BENT delivery tube. The other end of which is dipping into lime water in an another test tube. The mixture is heated strongly. (II) `2CuO+CrarrCO_(2) +2Cu` `CuO + 2HrarrH_(2)O+ Cu` (iii) Thus if carbon is present, it is oxidised to `CO_(2)` which turns lime water milky. If hydrogen is also present, it will be oxidised to water and CONDENSES in small droplets on the cooler wall of the test tube and inside the bulb. Water is collected on white anhydrous `CuSO_(4)` which turns blue. (iv) This CONFIRMS the presence of C and H in the compound.

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