(a) Solid sodium chloride does not conduct electricity while sodium chloride
(c) To carry out electrolysis of water, a few drops of sulphuric acid are
1. Give reasons for the following:
solution conducts.
(b) It is not safe to carry out electrical repairs outdoors during a
downpour.
hean
(carefully) added to the water.
(d) Kitchen gas burners are often coated with chromium.
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Answer:
a) Solid NaCl do not have mobile ions while aqueous NaCl has free mobile ions to conduct electricity
c) When H2SO4 is added to H2O, free mobile ions are produced to carry electricity
1.
b) Impure rainwater is a good conductor of electricity and so one can get an electeric shock.
d) Chromium avoids sparks to come in contact with LPG. Cromium is a bad conductor of heat
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