Which one of the following pairs of elements is liquid at room temperature and at normal pressure ?
[amp_mcq option1=”Gallium and Bromine” option2=”Mercury and Bromine” option3=”Gallium and Mercury” option4=”Gallium and Caesium” correct=”option2″]
This question was previously asked in
UPSC NDA-2 – 2021
– Bromine is the only non-metallic element that is liquid at room temperature.
– Gallium (melting point 29.8 °C) and Caesium (melting point 28.5 °C) melt just above typical room temperature but are usually considered solid at 25°C.