The alkali metals are low melting. Which of the following alkali metals is expected to melt if the room temperature rises to $$30{\,^ \circ }C?$$
A.
$$Na$$
B.
$$K$$
C.
$$Rb$$
D.
$$Cs$$
Answer :
$$Cs$$
Solution :
Atomic size increases down the group from $$Na$$ to $$Cs$$ so, the strength of metallic bonding decreases and hence, the melting point also decreases.
Releted MCQ Question on Inorganic Chemistry >> S - Block Elements
Releted Question 1
A substance absorbs $$C{O_2}$$ and voilently reacts with water. The substance is