Question

Give reasons
(a) Water is not used to control fires involving electrical equipment .
(b) LPG is a better domestic fuel than wood .
(c) Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not .​

Answer 1

Answer:

: (a) Water is not used to control fires involving electrical equipments as water conducts current and may cause the person dousing the fire to be electrocuted.

and Flame, NCERT Solutions (b) LPG has more calorific value and produces no pollution. So it is better domestic fuel than wood. (c) The ignition temperature of paper is less, so it catches fire easily. It does not catch fire when wrapped around aluminium pipe because aluminium absorbs the heat, so paper does not attain its ignition temperature.

Answer 2

Answer:

(a) Water is not used to control fires involving electrical equipment because it is a good conductor of electricity which may lead to electrical shocks.

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