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Graph in figure shows the variation in density $ρ$ of a liquid substance with temperature T. It can be seen that density of this substance is minimum at temperature $T_{C}$ . This liquid is used as a thermometer fluid in bulb of a thermometer and two such identical thermometers are used to measure temperature of two bodies A and B which are at temperature $T_{1}$ and $T_{2}$ . Now in an isolated system A and B are brought in contact so that they will be in thermal equilibrium. Which of the following statements is/are correct.

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Initially liquid level in thermometer of body A is lower than that of B

After thermal equilibrium, the level of liquid in both thermometers are less than initial level of both

After thermal equilibrium, the level of liquid in both thermometers may be more than initial level of both

After thermal equilibrium, the level of liquid in thermometer in contact with body A is more its initial level while the level of liquid in thermometer in contact with body B may be same as its initial level

answer is A, C, D.

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Detailed Solution

${_{P_{1}}}_{> P_{2} \Rightarrow l A < l B}$

After thermal equilibrium density will be minimum. Hence level of A increases and level of B may increase or remain same

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