ICSE Practical chemistry
I ) Identify the colour of following precipitates
(3)
1) Fe(OH)2
2) Pb(OH)2
3) Fe(OH)3
4) Zn(OH)2
5) Mg(OH)2
6) Cu(OH)2
II)
Identify the anion(s) present in the product(s) following reactions. (5)
1)
Silver
nitrate solution is added to hydrochloric acid solution.
2)
Milky
white precipitate of calcium carbonate when treated with excess carbon dioxide
3)
Reaction
of ammonium chloride with caustic soda.
4)
Ferrous sulphate with ammonium hydroxide.
5)
Chlorine
with water.
III) State the
observations of the following. (5)
1)
Calcium
sulphite on treatment with acidified potassium dichromate solution.
2)
Sodium
carbonate on treatment with barium chloride.
3)
Manganese
dioxide and conc. sulphuric acid with calcium chloride.
4)
Copper
nitrate with freshly prepared ferrous sulphate and conc sulphuric acid.
5) Calcium
sulphide with dil sulphuric acid.
IV) Name the
compound formed in the following reactions. (5)
1)
Reaction
of copper sulphate with excess ammonium hydroxide.
2) Reaction
of zinc sulphate with excess ammonium hydroxide.
3) Reaction
of ferrous sulphate with little ammonium hydroxide.
4) Reaction
of lead chloride with little sodium hydroxide.
5) Reaction
of magnesium carbonate with little sodium hydroxide.
V) Name the following gases based on the following
data. (2)
1) A
greenish yellow coloured gas.
2) A
reddish brown coloured gas.
3) A
gas with rotten egg smell.
4) A
gas with bleaching nature.
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