Q9 of 27 Page 79

Mark the correct options:

In this question we will apply Zeroth law of thermodynamics which state if two thermodynamics systems are each in thermal equilibrium with third one, then they are in thermal equilibrium with each other.

So look option (a) here Tx=Ty but Tx ≠ Tz hence Ty ≠ Tz which means Y and Z never in thermal equilibrium so option (a) is wrong.


In option (b) Tx=Ty but Tx ≠ Tz hence Ty ≠ Tz so this option is correct.


In option (c) Tx≠ Ty also Tx ≠ Tz hence Ty ≠ Tz so this option is also wrong.


And at last in option (d) Tx≠ Ty and Tx ≠ Tz hence Ty may be equal Tz so option (d) is correct.

More from this chapter

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7

The radius of a metal sphere at room temperature T is R, and the coefficient of linear expansion of the metal is α. The sphere is heated a little by a temperature ∆T so that its new temperature T is (T + ∆T). The increase in the volume of the sphere is approximately

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A sphere, a cube and a thin circular plate, all of same material and same mass are initially heated to same high temperature.

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‘Gulab Jamuns’ (assumed to be spherical) are to be heated in an oven. They are available in two sizes, one twice bigger (in radius) than the other. Pizzas (assumed to be discs) are also to be heated in oven. They are also in two sizes, one twice big (in radius) than the other. All four are put together to be heated to oven temperature. Choose the correct option from the following:

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Refer to the plot of temperature versus time (Fig. 11.2) showing the changes in the state of ice on heating (not to scale).

Which of the following is correct?