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Addition of impurity into water lowers t...

Addition of impurity into water lowers the freezing point of water.

Answer

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Soluble impurities present in water increase the freezing point of water. True of False?

What mass of NaCl must be dissolved in 65.0 g of water to lower the freezing point of water by 7.50^@C ? The freezing point depression constant (Kg) for water is 1.86^@ C/m. Assume van't Hoff factor for NaCl is 1.87. [Molar mass of NaCl = 58.5 g]

Knowledge Check

  • Each question contains STATEMENT-I(Assertion) and STATEMENT-2(Reason).the statement carefully and mark the correct answer accoring to the instrution given below: STATEMENT - 1 : addition of ethylene glycol to water lowers the freezing point of water, therefore, used as antifreeze substance. STATEMENT - 2 : Ethylene glycol is soluble in water.

    A
    If both the statements are TURE and STATEMENT-2 is the correct explanation STATEMENT-1
    B
    If both the statements are TURE but STATEMENT-2 is NOT the correct explanation STATEMENT-1
    C
    If STATEMENT-1 is TURE and STATEMENT-2 is FALSE
    D
    If STATEMENT-1 is FA,SE and STATEMENT-2 is TRUE

  • Impurities in water

    A
    decreases BP of water
    B
    increases BP of water
    C
    increases freezing point
    D
    None of these

  • Impurities in water

    A
    decreases BP of water
    B
    Increases BP of water
    C
    increases freezing point
    D
    None of these

    • Similar Questions

    Explore conceptually related problems

    What mass of ethylene glycol (molar mass = "62.0 g mol"^(-1) ) must be added to 5.50 kg of water to lower the freezing point of water from 0^(@)C to -10.0^(@)C ( k_(f) for water = "1.86 K kg mol"^(-1) ).

    Assiertion : Addition of ethyl alchol lowers the freezing point of water. Reason : Impurities always lower the freezing point of a point of a sovent.

    Statement-1 : Addition of ethylene glycol (non-volatile) to water lowers the freezing point of water hence used as freezing point. Statement-2 : Addition of any substance to water lowers its freezing point.\

    Assertion: Addition of 1,2-ethanediol to water lowers its freezing point. Reason: 1,2-Ethanediol is insoluble in water due to lack of its ability to form H-bonds with water molecules.

    These questions consists of two statements each, printed as Statement-I and Statement-II. While answering these Questions you are required to choose any one of the following four responses. Statement-I: Addition of ethylene glycol(non-volatile)to water lowers the freezing point of water hence used as antifreeze. Statement-II: Addition of any substance to water lowers its freezing point.

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