Question

If Q reacts with fluorine and oxygen, the molecular formula of fluoride and oxide will be respectively____________.

• A. $Q{F}_{3^{\prime }}{Q}_2{O}_3$
• B. $QF,Q_{2}O$
• C. $Q{F}_2,QO$
• D. None of these

Answer 1

Answer: (B)

$QF,Q_{2}O$

Q has low value of first ionization energy and high value of second ionization energy. Hence, it is an alkali metal and forms unipositive ion $Q^{+}$ It reacts with fluorine to form $QF$ and it reacts with oxygen to form $Q_{2}F$