Question

The following solids are formed by $X,\, Q$ and $Z.\, XY_{2},\,X_{2}Z,\,QZ$ . Then the formula of the compound formed by $Q$ and $Y$ is

• A. $QY$
• B. $Q_{2}Y_{3}$
• C. $QY_{4}$
• D. $QY_{3}$

Answer 1

Answer: (C)

$QY_{4}$

Answer 2

The following solids are formed by $X,\, Y,\, Q$ and $Z$.
$X Y_{2},\, X_{2} Z,\, Q Z$ According to the above formulae,
$X, Y, Q$, and $Z$ exhibit $+2,-1,+4$, and $-4$ oxidation states respectively. Therefore, the formula of the compound formed by $Q$ and $Y$ is $Q Y_{4}$.