31.

Which of the following is not correct?

• Milk is a naturally occurring emulsion

• Gold sol is a lyophilic sol

• Physical adsorption decreases with rise in temperature

• Chemical adsorption is unilayered

The functional groups present in 'salol' are

• -NH₂ and -OR

• OH and -COR

• -NH₂ and -COOH

• -OH and -COOR

Which of the folowing is biodegradable polymer?

• Polythene

• Bakelite

• PHBV

• PVC

$$\begin{gathered} {\mathrm{CH}}_3\mathrm{COOH} \stackrel{{\mathrm{LiAlH}}_4}{\to } \mathrm{A} \\ \mathrm{A} + {\mathrm{CH}}_3\mathrm{COOH} \stackrel{{\mathrm{H}}_3{\mathrm{O}}^{+}}{\to } \mathrm{B} + {\mathrm{H}}_2\mathrm{O} \end{gathered}$$

In the above reactions 'A' and 'B' respectively are

• CH₃COOC₂H₅, C₂H₅OH

• CH₃CHO, C₂H₅OH

• C₂H₅OH, CH₃CHO

• C₂H₅OH, CH₃COOC₂H₅

The correct match is:

•  A-v, B-iii, C-iv, D-i

• A-i, B-ii, C-iii, D-iv

• A-iii, B-iv, C-i, D-ii

• A-iv, B-i, C-ii, D-v

The IUPAC name of the compound (CH₃)₂CH—CH=CHCHOH—CH₃ is

• 5-methyl-hex-3-en-2-ol

• 2-methyl-hex-3-en-5-ol

• 2-hydroxy-5-methyl-3-hexene

• 5-hydroxy-2-methyl-3-hexene

Which of the following biomolecules acts as specific catalysts in biological reaction ?

• Carbohydrates

• Lipids

• Vitamins

• Enzyme

Nitrobenzene on reduction with zinc and NH₄Cl gives

• azobenzene

• aniline

• hydrazobenzene

• N-phenyl hydroxylamine

An organic compound 'X on treatment with pyridinium chloro chromate in dichloromethane gives compound 'Y'. Compound Y', reacts with I₂ and alkali to form triiodomethane. The compound 'X' is

• C₂H₅OH

• CH₃CHO

• CH₃COCH₃

• CH₃COOH

Aqueous solution of an organic compound, 'A' on electrolysis liberates acetylene and CO₂ at anode. 'A' is

• potassium acetate

• potassium succinate

• potassium citrate

• potassium maleate