Give reasons for the following :

Hydrogen chloride gas fumes in moist air but hydrogen sulphide gas does not.

Complete the statements given below using the correct word/s

1. An aqueous solution of HCl gas is named …………… [aqua fortis / muriatic acid / oil of vitriol]
2. The salt obtained when rock salt reacts with conc. H₂SO₄ at temperatures below 200°C is a/an …………… [acid/normal] salt.
3. In the preparation of HCl acid from HCl gas, a funnel arrangement provides …………… [less/more] surface area for absorption of the gas.
4. The ions which impart acidic properties to an aqueous solution of hydrogen chloride are …………… [chloride/hydrogen/hydronium]
5. The indicator which does not change colour on passage of hydrogen chloride gas is …………… [moist blue litmus / phenolphthalein / methyl orange].

Choose from the letters A, B, C, D and E, to match the descriptions 1 to 5 given below.

A : NH₄Cl
B : AgCl
C : PbCl₂
D : FeCl₂
E : Ag(NH₃)₂Cl

1. A soluble salt obtained on reaction of a metallic chloride with liquor ammonia.
2. A salt which is insoluble in dilute nitric acid but soluble in ammonium hydroxide.
3. A salt obtained on reaction of an active metal with hydrogen chloride gas.
4. A salt obtained when a basic gas reacts with hydrogen chloride gas.
5. A salt soluble in hot water but not in cold, obtained on heating an oxidising agent with conc. HCl.

Select the correct word or formula from the same given in bracket :

1. The substance reacted with conc. HCl and heated to prove that conc. HCl contains Cl₂. [PbCl₂/PbO₂/PbO]
2. The metal reacted with dil. HCl to prove that dil. HCl contains hydrogen. [Cu/Fe/Ag/Pb]
3. The gas/es which is/are heavier than air and highly soluble in water. [NH₃/HCl/CO₂/H₂S]
4. The acid which is not an oxidizing agent. [Conc. HNO₃ / Conc. HCl / Conc. H₂SO₄]
5. The acid which is not a monobasic acid. [Acetic/Sulphurous/Hydrochloric/Nitric/Formic acid]