Preparation of 1 M Solution

Q.

The mole fraction of a solute in a$100$ molal aqueous solution is _____$\times {10}^{-2}$ . (Round off to the Nearest Integer). [Given : Atomic masses : H : 1.0 u, O : 16.0 u].

Q.

What is the molarity of a solution that contains 20 g of NaOH in 1 L?

1. 2 M

2. 0.5 M

3. 0.005 M

4. 0.02 M

Q.

Which of the following solution can be used to prepare 1 M solution of sodium hydroxide solution?

1. 500 ml solution containing 20 g of NaOH

2. 1 L solution containing 20 g of NaOH

3. 1 L solution containing 10 g of NaOH

4. 500 ml solution containing 10 g of NaOH

Q.

How many grams of glucose dissolved in 1 litre of water will give its 1 M solution?

1. 96 g

2. 120 g

3. 180 g

4. 240 g

Q. Calculate the molarity (M) of a solution in which 2 mole of NaCl is dissolved in 5 litre of a solution.

1. 1 M
2. 1.5 M
3. 0.4 M
4. 2 M

Q. The number of moles of solute present in of solution is called molarity.

1. 1 litre
2. 10 litres
3. 1 millilitre

Q.

The molecular mass of sodium hydroxide is 40. If 1 litre of sodium hydroxide solution is prepared by dissolving 12 g of it then the molarity of the solution will be:

1. 3 M

2. 0.3 M

3. 3.33 M

4. 0.003 M

Q. When a solvent is added to a solution, the concentration of the solution.

1. increases
2. decreases
3. remains same

Q. can saturated solution be converted into unsaturated solution

Q. what is true soluction?

Q.

Which of the following formulae are correctly mentioned?

1. $Molarity=\frac{Numberofmolesofsolvent}{volumeofsolvent\left(litres\right)}$

2. $Molarity=\frac{Numberofmolesofsolvent}{volumeofsolute\left(kg\right)}$

3. $Molarity=\frac{Numberofmolesofsolute}{volumeofsolution\left(litres\right)}$

4. $Molality=\frac{Numberofmolesofsolute}{Massofsolvent\left(kg\right)}$

Q. Why different spots are formed on paper during separation of dyes from ink?

1. Insolubility of different components
2. Equal solubility of different components
3. Unequal solubility of different components
4. Both a and b

Q. The amount of solute dissolved in the solvent determines the strength of the solution.

1. True
2. False

Q.

Two moles of a solute dissolved in 2 litres of a solution will give

1. 1 M solution

2. 2 M solution

3. 0.5 M solution

4. 4 M solution

Q.

Which of the following statements is/are correct for 80 g of oxygen?

1. The atomic mass of oxygen is 16 u.

2. The molecular mass of oxygen is 32 u.

3. The number of gram atoms is 5.

4. The number of gram molecules is 10.

Q. When a solvent is added to a solution, the concentration of the solution.

1. increases
2. decreases
3. remains same