Question

1.
Give reasons for the following:
(a) Solid sodium chloride does not conduct electricity while sodium chloride
solution conducts.
(b) It is not safe to carry out electrical repairs outdoors during a heavy
downpour.
(C) To carry out electrolysis of water, a few drops of sulphuric acid are (carefully) added to the water.
(d) Kitchen gas burners are often coated with chromium.
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Answer 1

1) The sodium chloride (NaCl) ions does not move freely as atoms in solids are tightly packed but in solution as it is a liquid atoms are freely moving as compared to solids.

2) The pure water or H²O does not have atoms as they are valanced. By adding sulphur , sulphur ions get added in water thereby creating a source for electricity to travel or conduct.

3)During a heavy downpour the electricity can be conducted.

4) Chromium does not corrode.

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Answer 2

Answer:

a object push or pull is called force....

another languages jaise tum apni gf ko krte ho milne k liye ya phir baat krne k liye vo bhi force hota h.....

byeee take care...

gud nyt....