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Standard XII

Chemistry

Depression in Freezing Point

To lower the ...

Question

To lower the freezing point of water generally ________ is added.

salt

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sand

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sugar

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none of the above

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Solution

The correct option is C salt
Addition of impurities increases the B.P of a liquid and lowers the freezing point of the liquid.Here impurites refers to both sugar and salt but adding salt decreases to more extentent due to freezing point depression.

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Similar questions

Question 53
Assertion (A) When NaCl is added to water a depression in freezing point is observed.
Reason (R) The Lowering of vapour pressure of a solution causes depression in the freezing point.

Q. Substance

A

tetramerises in water to the extent of

80

. A solution of

2.5 g

A

100 g

of water lowers the freezing point by

{0.3}^{o} C

. The molar mass of

A

is (

K_{f}

for water

= 1.86 K K g m o l^{- 1}

)

Q. A certain substance 'A' tetramerises in water to the extent of

80 %

. A solution of

2.5

g of

A

100

g of water lowers the freezing point by

{0.3}^{o} C

. The molar mass of A is:

Q. Certain substance

A

tetramerises in water to the extent of

80 %

. A solution of

2.5 g

A

100 g

of water lowers the freezing point by

{0.3}^{o} C

.The molar mass of

A

is:

[k f = {1.86}^{o} C m - 1]

Q. A

0.001

molal solution of

[P t (N H_{3})_{4} C l_{4}]

in water had a freezing point depression of

{0.0054}^{o} C

. If

K_{f}

for water is 1.80, the correct formulation of the above molecule is:

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To lower the freezing point of water generally ________ is added.

The correct option is C saltAddition of impurities increases the B.P of a liquid and lowers the freezing point of the liquid.Here impurites refers to both sugar and salt but adding salt decreases to more extentent due to freezing point depression.

The correct option is C salt
Addition of impurities increases the B.P of a liquid and lowers the freezing point of the liquid.Here impurites refers to both sugar and salt but adding salt decreases to more extentent due to freezing point depression.