If 0.5 moles of BaCl₂ is reacted with 0.2 moles of Na₃PO₄ then the maximum moles of Ba₃(PO₄)₂ formed is:

1.	0.33	2.	0.25
3.	0.10	4.	0.52

What is the ratio of the number of atoms in 2.2 g of CO₂ and in 1.7 g of NH₃?

Calculate the number of ions present in 2L of a solution of 1.6 M K₄[Fe(CN)₆]:

On reduction with CO, 200 kg of iron ore (Fe₂O₃) containing 20% impurities gives iron. The amount of iron produced will be-

1. 84 kg

2. 200 kg

3. 56 kg

4. 112 kg

4.4 g of an unknown gas occupies 2.24 litres of volume at NTP. The gas may be: 

The number of gram molecules of oxygen in 6.02 × 10²⁴ CO molecules are:

1. 10 g molecules

2. 5 g molecules

3. 1 g molecules

4. 0.5 g molecules

An organic substance containing C, H, and O gave the following percentage composition :

C = 40.687%, H = 5.085% and O = 54.228%. The vapour density of this organic substance is 59.

The molecular formula of the compound will be:

1. C₄H₆O₄

2. C₄H₆O₂

3. C₄H₄O₂

4. None of the above

The molality of a 20% (by mass) CaCO₃ solution is : 
(Given: Density of solution is 1.2 gm/ml)

Consider the given reaction, 2SO₂ + O₂ $\to$2SO₃ 

6.4 g SO₂ and 3.2 g O₂ to form SO₃ . The mass of SO₃ formed is:  

1. 32 g
2. 16 g
3. 8 g
4. 4 g

A sample of CaCO₃ is 50% pure. On heating 1.12 litres of CO₂ (at STP) is obtained. The weight of residues left (assuming non-volatile impurity) is:

(Ca = 40, C= 12, O=16)