Abnormal Molar Masses and Van't Hoff Factor
CHXII02:SOLUTIONS

318986 A 1.2% solution of NaCl is isotonic with 7.2% solution of glucose. The Van’f Hoff factor of NaCl is

1 1
2 1.95
3 2
4 2.22
CHXII02:SOLUTIONS

318987 In comparison to a 0.01m solution of glucose, the depression in freezing point of a 0.01m \({\rm{MgC}}{{\rm{l}}_{\rm{2}}}\) solution is ........ .

1 The same
2 About twice
3 About three times
4 About six times
CHXII02:SOLUTIONS

318988 A non-volatile solute ‘A’ tetramerises in water to the extent of \({\rm{80\% }}\) 2.5g of ‘A’ in 100 g of water, lowers the freezing point by \({\rm{0}}{\rm{.}}{{\rm{3}}^{\rm{^\circ }}}{\rm{C}}\). The molar mass of \({\rm{A}}\,\,{\rm{in}}\,\,{\rm{g}}\,\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) is \(\left( {{{\rm{K}}_{\rm{f}}}{\mkern 1mu} {\mkern 1mu} {\rm{for}}{\mkern 1mu} {\mkern 1mu} {\rm{water = 1}}{\rm{.86}}{\mkern 1mu} {\mkern 1mu} {\rm{K}}{\mkern 1mu} {\mkern 1mu} {\rm{kg}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\)

1 62
2 221
3 155
4 354
CHXII02:SOLUTIONS

318989 The freezing point of benzene decrease by \({\rm{0}}{\rm{.4}}{{\rm{5}}^{\rm{^\circ }}}{\rm{C}}\) when 0.2 g of acetic acid is added to 20 g of benzene. If acetic acid associates to form a dimer in benzene will be :- (\({{\rm{K}}_{\rm{f}}}\) for benzene \({\rm{ = 5}}{\rm{.12K}}{\mkern 1mu} {\mkern 1mu} {\rm{kg}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\))

1 \(80.4\% \)
2 \(74.6\% \)
3 \(64.6\% \)
4 \(94.6\% \)
CHXII02:SOLUTIONS

318986 A 1.2% solution of NaCl is isotonic with 7.2% solution of glucose. The Van’f Hoff factor of NaCl is

1 1
2 1.95
3 2
4 2.22
CHXII02:SOLUTIONS

318987 In comparison to a 0.01m solution of glucose, the depression in freezing point of a 0.01m \({\rm{MgC}}{{\rm{l}}_{\rm{2}}}\) solution is ........ .

1 The same
2 About twice
3 About three times
4 About six times
CHXII02:SOLUTIONS

318988 A non-volatile solute ‘A’ tetramerises in water to the extent of \({\rm{80\% }}\) 2.5g of ‘A’ in 100 g of water, lowers the freezing point by \({\rm{0}}{\rm{.}}{{\rm{3}}^{\rm{^\circ }}}{\rm{C}}\). The molar mass of \({\rm{A}}\,\,{\rm{in}}\,\,{\rm{g}}\,\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) is \(\left( {{{\rm{K}}_{\rm{f}}}{\mkern 1mu} {\mkern 1mu} {\rm{for}}{\mkern 1mu} {\mkern 1mu} {\rm{water = 1}}{\rm{.86}}{\mkern 1mu} {\mkern 1mu} {\rm{K}}{\mkern 1mu} {\mkern 1mu} {\rm{kg}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\)

1 62
2 221
3 155
4 354
CHXII02:SOLUTIONS

318989 The freezing point of benzene decrease by \({\rm{0}}{\rm{.4}}{{\rm{5}}^{\rm{^\circ }}}{\rm{C}}\) when 0.2 g of acetic acid is added to 20 g of benzene. If acetic acid associates to form a dimer in benzene will be :- (\({{\rm{K}}_{\rm{f}}}\) for benzene \({\rm{ = 5}}{\rm{.12K}}{\mkern 1mu} {\mkern 1mu} {\rm{kg}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\))

1 \(80.4\% \)
2 \(74.6\% \)
3 \(64.6\% \)
4 \(94.6\% \)
CHXII02:SOLUTIONS

318986 A 1.2% solution of NaCl is isotonic with 7.2% solution of glucose. The Van’f Hoff factor of NaCl is

1 1
2 1.95
3 2
4 2.22
CHXII02:SOLUTIONS

318987 In comparison to a 0.01m solution of glucose, the depression in freezing point of a 0.01m \({\rm{MgC}}{{\rm{l}}_{\rm{2}}}\) solution is ........ .

1 The same
2 About twice
3 About three times
4 About six times
CHXII02:SOLUTIONS

318988 A non-volatile solute ‘A’ tetramerises in water to the extent of \({\rm{80\% }}\) 2.5g of ‘A’ in 100 g of water, lowers the freezing point by \({\rm{0}}{\rm{.}}{{\rm{3}}^{\rm{^\circ }}}{\rm{C}}\). The molar mass of \({\rm{A}}\,\,{\rm{in}}\,\,{\rm{g}}\,\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) is \(\left( {{{\rm{K}}_{\rm{f}}}{\mkern 1mu} {\mkern 1mu} {\rm{for}}{\mkern 1mu} {\mkern 1mu} {\rm{water = 1}}{\rm{.86}}{\mkern 1mu} {\mkern 1mu} {\rm{K}}{\mkern 1mu} {\mkern 1mu} {\rm{kg}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\)

1 62
2 221
3 155
4 354
CHXII02:SOLUTIONS

318989 The freezing point of benzene decrease by \({\rm{0}}{\rm{.4}}{{\rm{5}}^{\rm{^\circ }}}{\rm{C}}\) when 0.2 g of acetic acid is added to 20 g of benzene. If acetic acid associates to form a dimer in benzene will be :- (\({{\rm{K}}_{\rm{f}}}\) for benzene \({\rm{ = 5}}{\rm{.12K}}{\mkern 1mu} {\mkern 1mu} {\rm{kg}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\))

1 \(80.4\% \)
2 \(74.6\% \)
3 \(64.6\% \)
4 \(94.6\% \)
CHXII02:SOLUTIONS

318986 A 1.2% solution of NaCl is isotonic with 7.2% solution of glucose. The Van’f Hoff factor of NaCl is

1 1
2 1.95
3 2
4 2.22
CHXII02:SOLUTIONS

318987 In comparison to a 0.01m solution of glucose, the depression in freezing point of a 0.01m \({\rm{MgC}}{{\rm{l}}_{\rm{2}}}\) solution is ........ .

1 The same
2 About twice
3 About three times
4 About six times
CHXII02:SOLUTIONS

318988 A non-volatile solute ‘A’ tetramerises in water to the extent of \({\rm{80\% }}\) 2.5g of ‘A’ in 100 g of water, lowers the freezing point by \({\rm{0}}{\rm{.}}{{\rm{3}}^{\rm{^\circ }}}{\rm{C}}\). The molar mass of \({\rm{A}}\,\,{\rm{in}}\,\,{\rm{g}}\,\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) is \(\left( {{{\rm{K}}_{\rm{f}}}{\mkern 1mu} {\mkern 1mu} {\rm{for}}{\mkern 1mu} {\mkern 1mu} {\rm{water = 1}}{\rm{.86}}{\mkern 1mu} {\mkern 1mu} {\rm{K}}{\mkern 1mu} {\mkern 1mu} {\rm{kg}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}} \right)\)

1 62
2 221
3 155
4 354
CHXII02:SOLUTIONS

318989 The freezing point of benzene decrease by \({\rm{0}}{\rm{.4}}{{\rm{5}}^{\rm{^\circ }}}{\rm{C}}\) when 0.2 g of acetic acid is added to 20 g of benzene. If acetic acid associates to form a dimer in benzene will be :- (\({{\rm{K}}_{\rm{f}}}\) for benzene \({\rm{ = 5}}{\rm{.12K}}{\mkern 1mu} {\mkern 1mu} {\rm{kg}}{\mkern 1mu} {\mkern 1mu} {\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\))

1 \(80.4\% \)
2 \(74.6\% \)
3 \(64.6\% \)
4 \(94.6\% \)