1.

Assertion : In a freely falling liquid container, upthrust force is zero. Reason : In freely falling case value of effective value of g is zero.

Answer»

If both ASSERTION and Reason are correct and Reason is the correct EXPLANATION of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true but Reason is FALSE.
If Assertion is false but Reason is true.

Solution :upthrust =mass of fluid displaced `xx g_("effective")`
And in case of free FALL, `g_("effective")=0`


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