Question

. An element X is divalent and another element Y is tetravalent. The compound formed by these two elements will be:

(a) XY

(b) XY2

(c) X2Y

(d) XY4​

Answer 1

Answer:

b) XY2

Explanation:

X has valency 4 and Y has valency 2. So the ratio of valencies of X and Y has 2:1.

X Y

2 1

Answer 2

Given:

An element X is divalent and another element Y is tetravalent.

To Find:

The compound which is formed by the two elements X and Y is?

Solution:

The given problem can be solved using the concepts of bond formation.  

1. It is given that element X is divalent. A divalent ion implies the element has a charge of 2 units. The valency of X is 2 units.

2. The element Y is tetravalent. A tetravalent ion implies the element has a charge of 4 units. The valency of Y is 4 units.

3. According to the concepts of bond formation, If the valency of an element is x and the valency of another element is y. The compound formed by the two elements is$A_{y} B_{x}$.

4. Using the property mentioned above, the valency of one element is 2 and the valency of the other element is 4. Hence the compound formed by them will be,

= > $X_{4} Y_{2}$(OR)$X_{2}Y$.

Therefore, the compound formed by the two elements is X2Y. Option C is the correct answer.