1.

(A) A mixture of oxygen and ethyne is burnt for welding. ( R ) Burning of the mixture releases a large amount of heat.

Answer»

Both assertion (A) and reason ( R ) are true. And reason ( R ) is the true explanation of the assertion (A).
Both assertion (A) and reason ( R ) are true, but reason ( R ) is not the true explanation of the assertion (A).
Assertion (A) is true and reason ( R ) is FALSE.
Both assertion (A) and reason ( R ) are false.

ANSWER :A


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