Question 1

a) Choose the correct answers from the words given below

(HCl, Ag(NH₃)₂Cl, H₂SO₄, V₂O₅, N_2, O₂)

i) A salt obtained on reaction of a metallic chloride with Ammonia.

ii) The gas liberated when Ammonia is passed over heated PbO.

iii) The acid formed when Conc. HNO_3­ reacts with Sulphur.

iv) The catalyst used in the preparation of Sulphur trioxide from SO₂  in contact process.

v) A gas which undergoes ionization completely when dissolved in water.

b)   Match the following.                Example-   vi-F

Part-A

i)  Inert electrode

ii)  The ions which impart acidic nature to an acid

iii) Emulsifier

iv) Aqua regia

v)  A non-volatile acid

vi) A basic gas

Part-B

A) Hydronium ions

B) Liquor ammonia

C) Conc. HNO₃ + Conc. HCl

D) Iron

E) Conc.HCl

F) Ammonia

G) Conc. H₂SO₄

c) Select the correct answers from the words given below:

i) Ni -  2e^- à Ni²⁺  is _______________ reaction.

A) an oxidation               B) a reduction                C) Redox                 D) synthesis

ii) An active electrode

A) Iron                             B) Platinum                    C) Carbon                D) Copper

iii) The electrolyte used in the electroplating of an article with Silver:

A) AgNO₃                       B) Na[Ag(CN)₂]            C) AgCl₂                  D) KNO₃

iv) Which of the following cation is reduced most readily:

A) Mg²⁺                           B) K¹⁺                            C) Al³⁺                     D) Cu²⁺

v) Sodium hydroxide solution is a __________

A) strong electrolyte        B) weak electrolyte        C) poor electrolyte   D) non electrolyte

vi) Which of the following compounds liberates reddish brown vapours at anode during its electrolysis?

A)aq. NiSO₄                    B) aq.CuSO₄                  C) PbBr₂ fused         D) aq. PbBr₂

vii) Hydrogen chloride gas is dried using __________.

A) Conc. H₂SO₄              B) Conc.HNO₃              C) CaO                     D) CaCl₂

viii) The suitable pressure in Haber's process to prepare Ammonia from Nitrogen and Hydrogen is:

A) 20atm                         B) 200-900atm               C) 1-2atm                 D) 10-100atm

ix) The oxidized product formed when Sulphur is treated with Conc.H₂SO₄

A) SO₂                             B) S                                C) SO₃                      D) H₂S

x) The salt formed when dil.H₂SO₄ reacts with insufficient Sodium hydroxide:

A) Na₂SO₄                       B) NaHSO₄                    C) MgCl₂                  D) NaCl

d) Study the picture given and match A,B,C,D and E with the options given the brackets.

(Copper sulphate, Iron(II) sulphate, Zinc sulphate, Iron(III) chloride, Lead nitrate)

e) Fill in the blanks:-

i) Non-polar covalent compounds are _________ (non/good) electrolytes.

ii) Ammonia reduces to Chlorine to ____________( Hydrogen chloride/Sodium chloride)

iii) ____________ (Platinum/Iron) is used as a catalyst in the manufacture of Nitric acid by Ostwald's process.

iv) HCl gas is ____________ (lighter/heavier) than air.

v) H₂SO₄ is a ____________ (deliquescent/hygroscopic) liquid.

f) Correct the following sentences.

i) In an electrolysis anions migrate to cathode and cations migrate to anode.

ii) Phenolphthalein solution changes its colour from Orange to pink on passage of Hydrogen chloride gas through it.

iii) Ammonium hydroxide is also known as liquid ammonia.

iv) Conc. Nitric acid on thermal decomposition gives Nitrous oxide.

v) Conc. H₂SO₄ is a reducing agent.