Question

How many of the following are liquid at ${30}^{\circ }C$?
$Ga,Cs,B{r}_2,Hg$

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is D 4

The temperature at which a given solid melts is called the melting point.
The melting point of Ga is ${29.76}^{\circ }C$.
The melting point of Cs is ${28.44}^{\circ }C$.
The melting point of $B{r}_2$ is $-{7.2}^{\circ }C$.
The melting point of Hg is $-{38.83}^{\circ }C$.
So all of them are liquids at ${30}^{\circ }C$.