Chemistry Test ...

Phenol on treatment with \(\mathrm{CO}_2\) in the presence of \(\mathrm{NaOH}\) followed by acidification produces compound \(\mathrm{X}\) as the major product. \(\mathrm{X}\) on treatment with \(\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 \mathrm{O}\) in the presence of catalytic amount of \(\mathrm{H}_2 \mathrm{SO}_4\) produces :

Which of the following contains the same number of atoms as \(20 \mathrm{~g}\) of calcium \(\mathrm{Ca}\)?

Propane cannot be prepared from which reaction?

When hydrogen peroxide is added to an acidified solution of potassium dichromate, a blue colour is produced due to the formation of:

Oxidation state of iron in \(F e(C O)_{4}\) is:

Living cell contains \(60\)-\(75\%\) water. Water present in human body is:

\(3 \mathrm{~g}\) of activated charcoal was added to \(50 \mathrm{~mL}\) of the acetic acid solution \((0.06 \mathrm{~N})\) in a flask. After an hour, it was filtered and the strength of the filtrate was found to be \(0.042 \mathrm{~N}\). The amount of acetic acid adsorbed (per gram of charcoal) is :

The azo-dye \((\mathrm{Y})\) formed in the following reactions is Sulphanilic acid \(+\mathrm{NaNO}_2+\mathrm{CH}_3 \mathrm{COOH} \rightarrow \mathrm{X}\)

Which one of the following species responds to an external magnetic field?