511.

0ne mole of hydrazine (N₂H₄) loses 10 moles of electrons in a reaction to form a new compound X. Assuming that all the nitrogen atoms in hydrazine appear in the new compound, what is the oxidation state of nitrogen in X? (Note - There is no change in the oxidation state of hydrogen in the reaction).

• -1

• -3

• +3

• +5

Which one of the following is used as a test for aliphatic primary amines?

• Tollen's test

• Fehling's test

• lsocyanide test

• Azo dye test

When methanamine is treated with benzoyl chloride, the major product is

• N-phenylethanamide

• N-methylbenzamide

• benzanilide

• acetophenone

Phenyl isocyanide is prepared from aniline by

• Carbylamine reaction

• Rosenmund's reaction

• Koble's reaction

• Reimer-Tiemann reaction

Gabriel's phthalimide synthesis can be used to prepare

• ethanamine

• N-methylmethanamine

• benzene amine

• N, N-dimethylmethanamine

Select the compound which on treatment with nitrous acid liberates nitrogen.

• Nitroethane

• Triethylamine

• Diethylamine

• Ethylamine

The compound that neither forms semicarbazone nor oxime is

• HCHO

• CH₃COCH₃

• CH₃CHO

• CH₃CH₂CH₂NH₂

Positive carbylamine test is shown by

• N, N-dimethylaniline

• triethylamine

• N-methylaniline

• p-methylbenzylamine

Ethanoic acid on heating with ammonia forms compound A which on treatment with bromine and sodium hydroxide gives compound B. Compound B on treatment with NaNO₃/dil.HCl gives compound C. The compounds A, B and C respectively are

• ethanamide, methanamine, methanol

• propanamide, ethanamine, ethanol

• N-ethylpropanamide, methaneisonitrile, methanamine

• ethanamine, bromoethane, ethanediazoniumchloride

n-butylamine (l),  diethylamine (II) and N,  N-dimethylethylamine (III)  have the same molar mass.  The increasing order of their boiling point is

• III < II < I

• I < II < III

• II < III < I

• II < I < III