An element x reacts with oxygen to form a compound X₂O₃. If the atomic mass of x is 91.5 the equivalent mass of x is:-

1. 30.5

2. 45.75

3. 61

4. 91.5

The equivalent weight of a metal is 4.5 and the molecular weight of its chloride is 80. The atomic weight of the metal is:-

1. 18

2. 9

3. 4.5

4. 36

In the following unbalanced reaction

A²⁺ + B³⁺ $\to$A⁴⁺ + B

The total number of e^- transferred during reaction is 

1. 2

2. 3

3. 6

4. 8

Which of the following is not an intramolecular redox reaction?

1. NH₄NO₂ $\to$N₂ + 2H₂O

2. 2Mn₂O₇ $\to$4MnO₂ + 3O₂

3. 2KClO₃ $\to$2KCl + 3O₂

4. $2{\mathrm{H}}_2{\mathrm{O}}_2$ $\to$2H₂O + O₂

 The compound having oxygen in - 1 oxidation state is:-

What will be the value of x and y by balancing the reaction

C₂H₅OH + X I₂ + Y OH^- $\to$CHI₃ + HCO₂^- + 5I^- + 5H₂O

1. 4,6

2. 2,6

3. 2,4

4.  4,4

Which is the correct set that can only act as an oxidant? 

Which one is correct about CH₂ = CCl₂?

1. Both carbons are in +2 oxidation state.

2.  Both carbons are in +1 oxidation state.

3. One carbon has +2 and other -2 oxidation states.

4. The average oxidation number of carbon is +1.

N₂H₄ + IO₃^- + 2H⁺ + Cl^- $\to$ICl + N₂ + 3H₂O

The equivalent masses of N₂H₄ and KIO₃ respectively are :-

1. 8 and 35.6

2. 8 and 87

3. 8 and 53.5

4. 16 and 53.5

In which of the following compound oxidation state of Fe is zero:-

1. FeS

2. Fe₂O₃

3. FeSO₄

4. Fe(CO)₅