Question

1.Action of heat on the following compounds:
(a) copper carbonate, zinc carbonate
(b) washing soda, copper sulphate crystals
(c) zinc nitrate, copper nitrate, lead nitrate
(d) ammonium chloride, iodine, ammonium
dichromate
Make observations, identify the products and
make deductions where possible.
2. Action of dilute sulphuric acid on the
following substances. (warm if necessary)
(a) a metal
(b) a carbonate
(c) a sulphide
(d) a sulphite
Make observations, identify the gas evolved
and make deductions.
3. Apply the flame test to identify the metal in
the unknown substance.
(a) a sodium salt
(b) a potassium salt
(c) a calcium compound​

Answer 1

Answer:

1 ) Aim of the experiment : To heat the given unknown substance make observation , identify products and make deduction wherever possible the given substance may be

copper carbonate

zinc carbonate

washing soda

copper sulphate crystals

zinc nitrate

copper nitrate

Lead Nitrate

ammonium chloride

iodine or

ammonium dichromate .

Aparatus and Chemicals : Test tube , test tube holder , bunsen burner , unknown substance.

Procedure : Take a clean and dry test tube . Take a small amount of the given substance in the test tube hold, The test tube with the help of a test tube holder in a slanting position over the flame of a bunsen burner heated gently and then heated strongly note the changes taking place in the substance make two observations according to the observation table given below.

2 ) a sulphide

3 ) a calcium compound

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Explanation:

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Answer 2

Answer:

1.Action of heat on the following compounds:

(a) copper carbonate, zinc carbonate

(b) washing soda, copper sulphate crystals

(c) zinc nitrate, copper nitrate, lead nitrate

(d) ammonium chloride, iodine, ammonium

dichromate

Make observations, identify the products and

make deductions where possible.

2. Action of dilute sulphuric acid on the

following substances. (warm if necessary)

(a) a metal

(b) a carbonate

(c) a sulphide

(d) a sulphite

Make observations, identify the gas evolved

and make deductions.

3. Apply the flame test to identify the metal in

the unknown substance.

(a) a sodium salt

(b) a potassium salt

(c) a calcium compound

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