Question

An element $X$ combines with oxygen to form an oxide $X_{2}O$. This oxide is electrically conducting. Write the formula of the compound which is formed when $X$ reacts with chlorine.

• A. $XC{l}_2$
• B. $XCl$
• C. $X_{3}C{l}_2$
• D. None of the above

Answer 1

The correct option is B $XCl$

$2X^{+}+O^{2-}⟶X_{2}O$

$X$ has an electrovalency of $+1$.

$X^{+}+C{l}^{-}⟶XCl$

Hence, the correct option is B.