Question

The following reaction 4NH3 + 5O2-------- 4NO + 6H2O is an example of



i. displacement reaction ii. combination reaction

iii. redox reaction iv . neutralisation reaction

options are

1. i & iv

2. iii & ii

3. i & iii

4. iii & iv



Electrolysis of water is decomposition reaction . the mole ratio of H2and O2gas liberated during electrolysis of water is

1. 1:1

2. 2 :1

3. 4 :1

4. 1 :2

Answer 1

Answer:

1. (3.) i & iii

2. (2.) 2:1

Explanation:

1. Redox, as oxygen is reduced to form water, and nitrogen is oxidized to form  nitrogen monoxide.

Displacement, as oxygen atoms displace hydrogen atoms in NH₃, and Hydrogen displaces oxygen in O₂.

2. Reaction:

              electricity

2H₂O (l) ---------------> 2H₂ (g) + O₂ (g)

2 moles                    2 moles   1 mole

Therefore, ratio = H₂ : O₂

                          = 2 : 1