1 M, 2.5 litre NaOH solution is mixed with another 0.5 M and 3 litre NaOH solution.
The molarity of the resultant solution is:

1.	0.80 M	2.	1.0 M
3.	0.73 M	4.	0.50 M

Which among the following has the maximum number of molecules?

1. 7 gm N₂

2. 2 gm H₂

3. 16 gm NO₂

4. 16 gm O₂

The percentages of C, H, and N in an organic compound are 40%, 13.3%, and 46.7% respectively.
The empirical formula of the compound is:

Find the molarity of liquid HCl if the density of liquid HCl is 1.17 g/cc.

Molecular mass of  (i) ${\mathrm{H}}_2\mathrm{O}$ (ii) ${\mathrm{CO}}_2$ (iii) ${\mathrm{CH}}_4$ are respectively:

1. 18u,16u ,44u

2. 18u,44 u,16u

3. 16u,18u,44u

4. 44u,16u,18u

In sodium sulphate (Na₂SO₄), the mass percent of sodium, sulfur and oxygen is:

1. 32.4%, 45.05%, 22.6%

2. 22.6%, 45.05%, 32.4%

3. 32.4%, 22.6%, 45.05%

4. 45.05%, 32.4%, 22.6%

The amount of ${\mathrm{CO}}_2$ that can be produced when 2 moles of carbon are burnt in 16 g of dioxygen is:
1. 22 g
2. 44 g
3. 0.5 g
4. 11 g

The amount of copper (in grams) that can be obtained from 100 g of copper sulphate (CuSO₄) is:

1. Fe₃O₂

2. Fe₂O₂

3. Fe₂O₃

4. Fe₃O₄

The average atomic mass of chlorine using the following data would be:

1. 38.4527 u

2. 37.4527 u

3. 36.4527 u

4. 35.4527 u