Practical Organ...

For which compound, Lassaigne’s test for nitrogen is positive.

Statement-1 : Lithium is not used in Lassaigne’s test.
Statement-2 : It generally forms covalent compounds.

Sometimes diazo compounds do not respond Lassaigne’s test for nitrogen because

The compound which gives white precipitate on heating with HNO₂ followed by addition of silver nitrate, is

Lassaigne’s extract of p-nitrochlorobenzene is acidified with dil. HNO₃ and then treated with silver nitrate solution, the white precipitate formed is due to

Statement-1 : Formic acid usually exists as a dimer but hydrogen fluoride exists as a polymer.
Statement-2 : In case of formic acid, an intramolecular hydrogen bond is present, but in case of HF, intermolecular hydrogen bond is present.

Statement-1 : Fehling's solution can be used to distinguish benzaldehyde from acetaldehyde.

Statement-2 : The C-H bond of CHO group in benzaldehyde is stronger than the C-H bond of CHO group in acetaldehyde.

Carius method is not reliable for the estimation of

Positive Beilstein test for halogens show that