1 gm butane (C₄H₁₀) is burnt with excess of O₂ to form CO₂. The approximate mass of CO₂ produced is

1. 1gm

2. 2gm

3. 3gm

4. 4gm

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

2 gm Iron pyrite (FeS₂) is burnt with O₂ to form Fe₂O₃ and SO₂. The mass of SO₂ produced is (Fe=56, S=32, O=16)

1. 2 gm

2. 2.13 gm

3. 4 gm

4. 4.26 gm

What is the correct ascending order of masses for the following (I to IV)?
(Atomic mass : N=14, O=16 Cu = 63)

I. 1 molecule of oxygen

II. 1 atom of nitrogen

III. 1 x 10^-10g molecule-weight of oxygen

IV. 1 x 10^-10g atom-weight of copper
 

Codes
1. II < I < III < IV

2. IV < III < II < I

3. II < III < I < IV

4. III < IV < I < II

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

How many moles of FeC₂O₄ are required to reduce one mole of KMnO₄ in acidic medium?

1. 3/5

2. 1/5

3. 5/3

4. 5

Which of the following pairs of gases contains the same number of molecules:-

(1) 16g of O₂ and 14g of N₂ 

(2) 8g of O₂ and 22g of CO₂ 

(3) 28g of N₂ and 22g of CO₂ 

(4) 32g of O₂ and 32g of N₂ 

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

The mass of CO₂ that shall be obtained by heating 10 kg of 80 % pure limestone (CaCO₃) is:

1. 4.4 kg

2. 6.6 kg

3. 3.52 kg

4. 8.8 kg

How many protons are present in 1.8g of ${{\mathrm{NH}}_4}^{+}$ :-

1. N_A

2. 1.2 N_A

3. 1.1 N_A

4. 11 N_A