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20g of NaOH (Molar mass = 40 g mol^(-1) ...

20g of NaOH (Molar mass `= 40 g mol^(-1)` ) is dissolved in 500 `cm^(3)` of water.Molality of resulting solution is

A

0.1m

B

0.5m

C

1.5m

D

1.0m

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • Select and write the most appropriate answer from the given alternatives for each sub-question : 4.0 grams of NaOH (Molar mass = 40.0 gram "mol"^(-1) ) is dissolved in 500 cm^(3) of water. What is the molarity of NaOH solution ?

    A
    1 M
    B
    0.8 M
    C
    0.5 M
    D
    0.2 M

  • 5.0 g of sodium hydroxide (molar mass 40 g mol^(-1) ) is dissolved in little quantity of water and the molarity of the resulting solution?

    A
    0.1 mol `dm^(-3)`
    B
    1.0 mol `dm^(-3)`
    C
    0.125 mol `dm^(-3)`
    D
    1.25 mol `dm^(-3)`

  • 25 g of a solute of molar mass 250 g mol^(-1) is dissolved in 100 ml of water to obtain a solution whose density is 1.25 g ml^(-1) . The molarity and molality of the solution are respectively

    A
    0.75 and 1
    B
    0.8 and 1
    C
    1 and 0.8
    D
    1 and 0.75

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