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

1. FeS

2. Fe₂O₃

3. FeSO₄

4. Fe(CO)₅

In the given reaction,

xBrO₃^-+ yCr⁺³ + zH₂O $\to$Br₂ + CrO₄^2- + H⁺

The coefficients x, y, and z are respectively-

1. 6, 10, 11

2. 6, 10, 20

3. 6, 8, 22

4. 6, 10, 22

What is the equivalent weight of H₃PO₃ in the following disproportionation reaction:-

H₃PO₃ $\to$H₃PO₄ + PH₃

1. $\frac{M}{6}$   

 2. $\frac{M}{2}$ 

3.  $\frac{2M}{3}$ 

 4. $\frac{M}{3}$

Identify the substance acting as an oxidant in the following reaction:

BaCl₂ + Na₂SO₄$\to$BaSO₄ + 2NaCl

1. BaCl₂

2. Na₂SO₄

3. NaCl

4. None of the above

In the reaction:

Al + Fe₃O₄  → Al₂O₃ + Fe

How many electrons are transferred in total during the reaction?

1. 6

2. 8

3. 8/3

4. 24

A metallic oxide contains 40% oxygen then equivalent weight of metal is 

1. 48

2. 36

3. 24

4. 12

3Cl₂ + 6NaOH $\to$5NaCl + NaClO₃ + 3H₂O, the equivalent weight of NaOH will be

1. 40

2. 48

3. 60

4. 80

Which process occurs in the conversion:
 H₂SO₄ $\to \hspace{0.17em}$H₂S₂O₈

1. Oxidation

2. Reduction

3. Oxidation as well as reduction

4. Neither oxidation nor reduction

Oxidation number of carbon in CH₂Cl₂ is:

1. -4

2. +4

3. -2

4. zero

Equivalent weight of a metal oxide is 20, the equivalent weight of sulphate of same metal will be 

(1) 60

(2) 69

(3) 108

(4) 54