How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO₃? The concentrated acid is 70% HNO₃.

1. 45.0 g conc. HNO₃

2. 90.0 g conc. HNO₃

3. 70.0 g conc. HNO₃

4. 54.0 g conc. HNO₃

Find the molality of 15% (w/vol.) solution of H₂SO₄ of density 1.1g/cm³ :

1. 1.2

2. 1.4

3. 1.8

4. 1.6

Which mode of expressing concentration is independent of temperature?

1. Molality

2. Percent by mass

3. Mole fraction

4. All of these

The molality of 1M solution of NaCl ( specific gravity 1.0585 g/mL ) is:

1. 1.0585

2. 1.0

3. 0.10

4. 0.0585

The total molarity of all the ions containing 0.1 M of CuSO₄ and o.1M of Al₂(SO₄)₃ is:

1. 0.2M

2. 0.7M

3. 0.8M

4. 1.2M