Question

Mercury is used to in the thermometers because
$\left( A \right)$ It does not wet the glass
$\left( B \right)$ It expands on heating
$\left( C \right)$ It is a liquid
$\left( D \right)$ All of these

Answer 1

Hint: Mercury is a transition-metal, it is found in the $d - $ block element in the periodic table. Mercury is represented by the symbol $Hg$ . It is used to in the thermometer to measure the temperature of the body due to following reasons:

Complete step by step answer:
As we know mercury is metal which is used in the thermometer to measure the temperature of the body or any other things. The use of mercury in the thermometer because of following reasons:
Mercury is the only one in liquid state at room temperature. It has high coefficient of expansion due to high coefficient of expansion when there is a small change in temperature is notable when used in the thermometer. It has a shiny appearance and does not stick to the glass surface of glass. Hence it does not wet the glass of the thermometer. It has a high boiling point which makes it very suitable to measure the higher temperature.
Thus we can say that all the given options are true. Hence the correct option is $D.$

Additional information: Thermometer is an instrument which is used to measure the temperature of the body, liquid and vapors. A clinical thermometer is used to measure the temperature of the body whereas a laboratory thermometer is used to measure the temperature of the liquid. The range of clinical thermometer is between ${35^ \circ }C$ to ${42^ \circ }C$ and the range of thermometer is generally ${0^ \circ }C$ to ${100^ \circ }C$ .

Note:
Most metals are good conductors of heat and electricity and they are solid at room temperature. Mercury is the only metal which is liquid at room temperature. It is also known as quicksilver and was formerly named hydrargyrum.