Thermal properties of matter-NEET/JEE/PH mock test-1

On a new scale of temperature (which is linear) and called the $W$ scale, the freezing and boiling points of water are 39°W and 239°W respectively. What will be the temperature on the new scale, corresponding to a temperature of 39°C on the Celsius scale? (2OO8)

Mercury thermometer can be used to measure temperature upto (1992)

A Centigrade and a Fahrenheit thermometer are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers $140^\circ$F. What is the fall in temperature as registered by the centigrade thermometer? (1990)

A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is $(\alpha_{\mathrm{Cu}}=1.7\times10^{-5} \mathrm{K}^{-1},\alpha_{\mathrm{Al}}=2.2\times10^{-5} \mathrm{K}^{-1})$

Coefficient oflinear expansion of brass and steel rods are $\alpha_1$ and $\alpha_2.$ Lengths of brass and steel rods are $l_1$ and$l_2$respectively. If$\left(l_{2}-l_{1}\right)$is maintained same at all temperatures, which one of the following relations holds good? (NEET-I 2016, 1999)