31.

Dissolution of 1.5 g of a non-volatile solute (mol. wt. = 60) in 250 g of a solvent reduces its freezing point by 0.01 °C. Find the molal depression constant of the solvent.

• 0.01

• 0.001

• 0.0001

• 0.1

Argon possesses

• translational motion only

• translational + rotational motion

• translational + vibrational motion

• translational + rotational + vibrational motion

Which gives + 7 oxidation state ?

• Mn(25)

• Cr (24)

• Cu(29)

• Fe(26)

From which group the fats belong?

• Carboxylic acids

• Carbonyl

• Ester

• Fatty acids

How many isomeric vicinal-dihalides are possible for the compound having molecular formula C₃H₆Cl₂ ?

• 1

• 2

• 3

• 4

In the following reaction sequence,

CH₃CHO $\underset{\mathrm{Ca}(\mathrm{OH}{)}_2}{\overset{{\mathrm{Cl}}_2}{\to }}$ X $\underset{\mathrm{Alc}. \mathrm{KOH}}{\overset{{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2}{\to }}$ Y

Y is

• CH₃CH=NHC₆H₅

• C₆H₅NHCH₃

• C₆H₅NC

• C₆H₅NCO

The raw material for Raschig process is

• chlorobenzene

• phenol

• benzene

• anisole

For the formation of terylene the number of moles of ethylene glycol required per mole of terephthalic acid is

• 1

• 2

• 3

• 4

Among the following, the formula of saturated fatty acid is

• C₁₇H₂₉COOH

• C₁₇H₃₅COOH

• C₁₇H₃₁COOH

• C₁₇H₃₃COOH

Ethyl methyl ketone is obtained by heating calcium salts of

• formic acid + propionic acid

• acetic acid + propionic acid

• acetic acid only

• acetic acid + methanoic acid