Assertion :A wooden cube when placed in two liquids of different densities the height of the cube above the liquid is different. Reason: Volume immersed depends on the density of liquid.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Since the height above liquid will depend on the volume immersed and density of liquid. Buoyancy force is defined as the mass of liquid displaced.
$m g = V_{1} ρ_{1} g$
$m g = V_{2} ρ_{2} g$
So for different densities, volume immersed will be different, $V_{1} \neq V_{2}$ and hence the height of the cube above the liquid is different.

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Choose the correct option.

Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst.

Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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