1.

Assertion (A) : Alloys are commonlyused in electrical heating devices like electric iron and heater. Reason (R ) : Resistivity of an alloy is generally higher than that of its constituent metals but the alloys have low melting points than their constituent metals.

Answer»

Both (A) and (R ) are true and (R ) is correct EXPLANATION of the assertion.
Both (A) and (R ) are true but (R ) is not the correct explanation of the assertion.
(A) is true but (R ) is false.
(A) is false but (R ) is true.

Solution :(A) is true but (R ) is false.
Reistivity of an ALLOY is GENERALLY HIGHER than that of its constituent metals and the alloys do not oxidize EASILY at high temperatures.


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