ExamGOAL
Books
PreviousNext
23
MCQ (Single Correct Answer)

If two liquids $A$ and $B$ form minimum boiling azeotrope at some specific composition then

A
$A-B$ interactions are stronger than those between $A-A$ or $B-B$
B
vapour pressure of solution increases because more number of molecules of liquids $A$ and $B$ can escape from the solution
C
vapour pressure of solution decreases because less number of molecules of only one of the liquids escape from the solution
D
$A-B$ interactions are weaker than those between $A-A$ or $B-B$
24
MCQ (Single Correct Answer)

4 L of 0.02 M aqueous solution of NaCl was diluted by adding 1 L of water. The molality of the resultant solution is ........... .

A
0.004
B
0.008
C
0.012
D
0.016
25
MCQ (Single Correct Answer)

On the basis of information given below mark the correct option. Information On adding acetone to methanol some of the hydrogen bonds between methanol molecules break.

A
At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoult's law
B
At specific composition methanol-acetone mixture will form maximum boiling azeotrope and will show positive deviation from Raoult's law
C
At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show negative deviation from Raoult's law
D
At specific composition methanol-acetone mixture will form maximum boiling azeotrope and will show negative deviation from Raoult's law
26
MCQ (Single Correct Answer)

$\mathrm{K}_{\mathrm{H}}$ value for $\mathrm{Ar}(\mathrm{g}), \mathrm{CO}_2(\mathrm{~g}), \mathrm{HCHO}(\mathrm{g})$ and $\mathrm{CH}_4(\mathrm{~g})$ are 40.39, 1.67, $1.83 \times 10^{-5}$ and 0.413 respectively.

Arrange these gases in the order of their increasing solubility.

A
$\mathrm{HCHO}<\mathrm{CH}_4<\mathrm{CO}_2<\mathrm{Ar}$
B
$\mathrm{HCHO}<\mathrm{CO}_2<\mathrm{CH}_4<\mathrm{Ar}$
C
$\mathrm{Ar}<\mathrm{CO}_2<\mathrm{CH}_4<\mathrm{HCHO}$
D
$\mathrm{Ar}<\mathrm{CH}_4<\mathrm{CO}_2<\mathrm{HCHO}$
27
MCQ (Multiple Correct Answer)

Which of the following factor(s)affect the solubility of a gaseous solute in the fixed volume of liquid solvent?

(i) Nature of solute (ii) Temperature (iii) Pressure

A
(i) and (iii) at constant $T$
B
(i) and (ii) at constant $p$
C
(ii) and (iii)
D
Only (iii)
PreviousNext