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JEE · NEET Previous Year Question

$A hot liquid cools from 70°C to 60°C in 5 minutes. The time needed by same liquid to cool from 60°C to 50°C will be-$

Topic: NEET PYQ

Answer: B. Full step-by-step solution below.

A $Less than 5 minutes$
B $More than 5 minutes$
C $Equal to 5 minutes$
D $Less or more than 5 minutes that depends on the density of liquid$

Correct answer: B

Solution

(b) As temperature of liquid decreases, rate of cooling decreases. So it takes more time for same temperature change.

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