The oxidation number and covalency of sulphur in the sulphur molecule (S₈) are respectively:

1. 0, and 2

2. +6, and 8

3. 0, and 8

4. +6, and 2

Hypochlorite disproportionate to give

1. Cl^- and Cl${\mathrm{O}}_4^{-}$

2. Cl${\mathrm{O}}_4^{-}$ and Cl${\mathrm{O}}_3^{-}$

3. Cl${\mathrm{O}}_3^{-}$ and Cl^-

4. Cl${\mathrm{O}}_2^{-}$ and Cl^-

When Cl₂ is converted into Cl^- & Cl${\mathrm{O}}_3^{-}$ then n-factor of Cl₂ will be:

1. 3/5

2. 5/3

3. 7/2

4. 2

MnO₂ + 4HCl $\to$MnCl₂+2H₂O+Cl₂, the equivalent wt. of HCl will be (M$\equiv$Mol wt of HCl)

1. M

2. M/2

3. 2M

4. M/4

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

In the reaction

xBrO_3^- + yCr⁺³ + zH₂O $\to$Br₂ + CrO_4^-2 + H⁺

the coefficients x,y,z are respectively ?

1. 6, 10, 11

2. 6, 10, 20

3. 6, 8, 22

4. 6, 10, 22

In the reaction

Al + Fe₃O₄ $\to$Al₂O₃ + Fe

total number of electrons transferred during reaction are:-

1. 6

2. 8

3. 8/3

4. 24

x gram of pure As₂S₃ is completely oxidised to respective highest oxidation states by 50 ml of 0.1 M hot acidified KMnO₄ then x mass of As₂S₃ taken is : (Molar mass of As₂S₃ = 246)

1. 22.4 g

2. 43.92 g

3. 64.23 g

4. None

In the reaction Na₂S₂O₃ + 4Cl₂ + 5H₂O → Na₂SO₄ + H₂SO₄ + 8HCI the equivalent weight of Na₂S₂O₃ will be

1. M/4

2. M/8

3. M/1

4. M/2

(M= molecular weight of Na₂S₂O₃)

In the reaction CrO₅ + H₂SO₄ → Cr₂(SO₄)₃ + H₂O + O₂ one mole of CrO₅ will liberate how many moles of O₂

1. 5/2

2. 5/4

3. 9/2

4. none of these