Question

The salt of an oxyacid of a metal $M$ contains one sulphur and four oxygen atoms. The valency of metal $M$ is:

• A. 1
• B. 2
• C. 3
• D. 0

Answer 1

The correct option is B 2

Let the formula of the salt of an oxyacid of a metal M containing one sulphur and four oxygen atom be $MS{O}_4$
its a neutral molecule therefore total valency should be zero. Let the valency of metal ion be $x$, valency of $S$ is $+6$ and of $O$ is $-2$
therefore, $x+6+4\times (-2)=0$
or $x=+2$
Its a bivalent metal ion and thus option B is correct.