Give reason :
1 - Anhydrous HCl is a poor conductor while aqueous HCl is an excellent conductor.
2 - When the stopper of a bottle full of hydrogen chloride gas is opened there are fumes in the air.
3 - A solution of hydrogen chloride in water turns blue litmus red , and conduct electricity , while a solution of the same gas in toluene ;
(a) has no effect on litmus
(b) does not conduct electricity.
4 - Thick white fumes are formed when a glass rod dipped in ammonium hydroxide is bought near the mouth of a bottle full of HCl gas
5- Hydrogen chloride gas is not collected over water.
6 - Ammonium compounds do not occur as minerals.
7 - Ammonium nitrate is not used in the preparation of ammonia.
8 - Conc H2SO4 is a good drying agent , yet it is not used to dry NH3.
9 - Liquid ammonia is used as a refrigerant in ice plants.
10 - Aqueous solution of ammonia is used for removing grease stains from wollen clothes.
11 - Aqueous solution of ammonia gives a pungent smell.
12 - Concentrated Sulphuric acid kept in air tight bottles.
13 - only all glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.
14 - Nitric acid is kept in a reagent bottle for along time.
15 - Why is freshly prepared ferrous sulphate solution used for testing the nitrate radicals in the brown ring test.
16 - Pure nitric acid is colorless but the acid obtained in laboratory is slightly yellow.
17 - Sulphuric acid forms two types of salts with NaOH.
18 - Red brown vapours are produced when concentrated sulphuric acid is added to hydrogen bromide.
19 - A piece of wood becomes black when concentrated sulphuric acid is poured on it
20 - Brisk effervescence is seen when oil of vitriol is added to sodim carbonate.
21 - Ethyne is more reactive than ethene.
22 - Ethene is more reactive than ethane.
23 - Hydrocarbons are excellent fuels.
24 - Why the impurity of arsenic oxide must be removed before passing the mixture of SO₂ and air through the catalytic chamber in the preparation of sulphuric acid.
25 - Why is pure acetic acid known as glacial acetic acid?
6 - Ammonium compounds do not occur as minerals.
7 - Ammonium nitrate is not used in the preparation of ammonia.
8 - Conc H2SO4 is a good drying agent , yet it is not used to dry NH3.
9 - Liquid ammonia is used as a refrigerant in ice plants.
10 - Aqueous solution of ammonia is used for removing grease stains from wollen clothes.
11 - Aqueous solution of ammonia gives a pungent smell.
12 - Concentrated Sulphuric acid kept in air tight bottles.
13 - only all glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.
14 - Nitric acid is kept in a reagent bottle for along time.
15 - Why is freshly prepared ferrous sulphate solution used for testing the nitrate radicals in the brown ring test.
16 - Pure nitric acid is colorless but the acid obtained in laboratory is slightly yellow.
17 - Sulphuric acid forms two types of salts with NaOH.
18 - Red brown vapours are produced when concentrated sulphuric acid is added to hydrogen bromide.
19 - A piece of wood becomes black when concentrated sulphuric acid is poured on it
20 - Brisk effervescence is seen when oil of vitriol is added to sodim carbonate.
21 - Ethyne is more reactive than ethene.
22 - Ethene is more reactive than ethane.
23 - Hydrocarbons are excellent fuels.
24 - Why the impurity of arsenic oxide must be removed before passing the mixture of SO₂ and air through the catalytic chamber in the preparation of sulphuric acid.
25 - Why is pure acetic acid known as glacial acetic acid?
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