Elements of group-15 form compounds in +5 oxidation state. However, bismuth forms only one well characterised compound in +5 oxidation state. The compound is:

1. Bi₂O₅

2. BiF₅

3. BiCl₅

4. Bi₂S₅

On heating ammonium dichromate and barium azide separately we get

1. N₂ in both cases

2. N₂ with ammonium dichromate and NO with barium azide

3. N₂O with ammonium dichromate and N₂ with barium azide

4. N₂O with ammonium dichromate and NO₂ with barium azide

In the preparation of HNO₃, we get NO gas by catalytic oxidation of ammonia.
The moles of NO produced by the oxidation of two moles of NH₃ will be ______.

1. 2

2. 3

3. 4

4. 6

Which of the following are peroxoacids of sulphur?

1. H₂SO₅ and H₂S₂O₈

2. H₂SO₅ and H₂S₂O₇

3. H₂S₂O₇ and H₂S₂O₈

4. H₂S₂O₆ and H₂S₂O₇

Hot conc. H₂SO₄ acts as moderately strong oxidising agent. It oxidises both metals and nonmetals. Which of the following element is oxidised by conc. H₂SO₄ into two gaseous products?

1. Cu

2. S

3. C

4. Zn

A black compound of manganese reacts with a halogen acid to give greenish-yellow gas. When excess of this gas reacts with NH₃ an unstable trihalide is formed. In this process the oxidation state of nitrogen changes from _________.

1. – 3 to +3

2. – 3 to 0

3. – 3 to +5

4. 0 to – 3

In the preparation of compounds of Xe, Bartlett had taken $O_2^{+}Pt{F}_6^{-}$ as a base compound. This is because

1. Both O₂ and Xe have same size.

2. Both O₂ and Xe have same electron gain enthalpy.

3. Both O₂ and Xe have almost same ionisation enthalpy.

4. Both Xe and O₂ are gases.

Reduction potentials of some ions are given below. Arrange them in decreasing order of oxidising power.

Ion                                                 $Cl{O}_4^{-}$                  $I{O}_4^{-}$                  $Br{O}_4^{-}$

Reduction potential $E^{⊝}/V$        $E^{⊝}=1.19 V$       $E^{⊝}=1.65 V$       $E^{⊝}=1.74 V$

1. $Cl{O}_4^{-}>I{O}_4^{-}>Br{O}_4^{-}$

2. $I{O}_4^{-}>Br{O}_4^{-}>Cl{O}_4^{-}$

3. $Br{O}_4^{-}>I{O}_4^{-}>Cl{O}_4^{-}$

4. $Br{O}_4^{-}>Cl{O}_4^{-}>I{O}_4^{-}$

Match the items of Columns I and II and mark the correct option.
     Column I                                                       Column II

(A) H₂SO₄                                              (i) Highest electron gain enthalpy
(B) CCl₃NO₂                                           (ii) Chalcogen
(C) Cl₂                                                   (iii) Tear gas
(D) Sulphur                                             (iv) Storage batteries

(1) A(iv) B(iii) C(i) D(ii)

(2) A(iii) B(iv) C(i) D(ii)

(3) A(iv) B(i) C(ii) D(iii)

(4) A(ii) B(i) C(iii) D(iv)

Match the items of Columns I and II and mark the correct option.
     

                      Column I                                                  Column II

(A) Its partial hydrolysis does not                                        (i) He
    change oxidation state of central atom

(B) It is used in modern diving apparatus                             (ii) XeF₆

(C) It is used to provide inert atmosphere                            (iii) XeF₄
     for filling electrical bulbs

(D) Its central atom is in sp³d² hybridisation                        (iv) Ar

1. A(i) B(iv) C(ii) D(iii)

2. A(i) B(ii) C(iii) D(iv)

3. A(ii) B(i) C(iv) D(iii)

4. A(i) B(iii) C(ii) D(iv)