Question

B. Statements given below are incorrect. Write
correct statements :
1. Distilled water is a mixture.
2. Clear tap water is a pure substance.
3. Separation of constituents of compound
is possible through physical means.
4. Salt solution is an example of a
heterogeneous mixture.
5. The constituents of compound ferrous
sulphide can be separated by using
magnet.​

Answer 1

Correct Statements :-

1. Distilled water is a compound.

2. Clear tap water is an impure substance.

3. Separation of constituents of compound  is possible through chemical means.

4. Salt solution is an example of a  homogeneous mixture.

5. The constituents of compound ferrous  sulphide cannot be separated by using  magnet.​

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Reasons :-

1. Distilled water is not a mixture because it only contains one type of molecules. It is pure liquid H₂O, which makes it a compound.

2. Tap water contains some dissolved impurities, so it is not a pure substance. It is a mixture.

3. Separation of constituents of compound  is possible only through chemical means because molecular bonds cannot be broken by simple physical means.

4. Salt solution is a  homogeneous mixture because all solutions are considered homogeneous as the dissolved material is present in the same amount throughout the solution.

5. The constituents of compound ferrous  sulphide cannot be separated by using  magnet because they are chemically bonded and cannot be broken by simple physical means.

Answer 2

Answer:

Distilled water is not a mixture it is pure substance because in this water all it's components like salt and minerals are separated.

2.Generally tap water contains some dissolved particles other than water, so tap water is not a pure substance.

4.salt water is a mixing salt (Nacl) water. so it is a homogenous mixture.

5.when two elements combine to form a compound there chemical properties change thus ferrous from ferrous sulphide can't separated by using magnet

3.Compounds.A combination of two or more elements or parts. A pure macroscopically homogenous substance that consists of atoms or ions of different elements in the definite proportion that cannot be separated by physical means , and that have properties unlike those of its constituents elements

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