Question

Which of the following pair of the elements are liquids at $25$ and $1atm$ pressure?

• A. $Hg$ and $Br$
• B. $Hg$ and $I$
• C. $Ag$ and $Kr$
• D. $Au$ and $Kr$
• E. $Pt$ and $Co$

Answer 1

Answer: (A)

$Hg$ and $Br$

Two elements which are liquid at room temperature (298 K) and 1 atm pressure are :

1. Bromine ($Br$), a reddish-brown liquid with a suffocating odour, melts at 265.9 K.

2. Mercury ($Hg$), a toxic metal, melts at 234.32 K.

Hence the correct option is A.