W₁ g of an element combines with oxygen forming W₂ g of its oxide. The equivalent mass of the element is:

1. [W₁ / W₂]x8

2. [W₁ / W₂-W₁]x8

3. [W₂-W₁/W₁ ]x8

4. [W₁ / W₁-W₂]x8

The normality of 4% (mass/Vol.) NaOH is:

1. 0.1

2. 1.0

3. 0.05

4. 0.01

The number of peroxide linkages in CrO₅ is /are

1. One

2. Two

3. Three

4. None of the above

Conversion of PbSO₄ to PbS is:

1. Reduction of S

2. Oxidation of S

3. Dissociation

4. None of the above

An aqueous solution of SO₂ reacts with H₂S to precipitate sulfur. Here SO₂ acts as:

1. Catalyst

2. Reducing agent

3. Oxidising agent

4. Acid

Redox reaction among the following is -

1. NaCl + KNO₃ $\to$NaNO₃ + KCl

2. CaC₂O₄ + 2HCl $\to$CaCl₂ + H₂C₂O₄

3. Mg(OH)₂ + 2NH₄Cl $\to$MgCl₂ + 2NH₄OH

4. Zn + 2AgCN $\to$2Ag + Zn(CN)₂

Reaction that represents reduction of hydrogen is -

1. Carbon Monoxide + Copper Oxide $\to$ Carbon Dioxide + Copper

2. Copper Oxide + Hydrochlorid Acid $\to$ Water + Copper Chloride

3. Steam + Iron $\to$Hydrogen + Iron oxide

4. Hydrogen+ Iron Oxide $\to$ Water + Iron

The oxidation number of Fe in K₃[Fe(CN)₆] is-

1. +2

2. +3

3. +4

4. +1

It is found that v forms a double salt isomorphous with Mohr's salt. The oxidation number of V in this compound is:

1. +3

2. +2

3. +4

4. -4

The correct order of reducing power of halide ions is:

1. Cl^- > Br^- > I^- > F^-

2. Cl^- >  I^- > Br^- > F^-

3.  Br^- > Cl^- > I^- > F^-

4.  I^- > Br^- > Cl^- > F^-