Valency

Q. The valency of oxide ion is .

1. 1
2. 3
3. 2

Q.

What is the valency of carbon in ${CH}_4$ ?

__

Q.

The combining capacity of an element is known as its ______________.

1. atomicity

2. configuration

3. valency

4. velocity

Q.

What is the charge of Mg in $Mg{Cl}_2$ ?

1. 3+

2. 2+

3. 4+

4. 1+

Q. The atomicity of Na is 1. What does it mean?

1. It has one electron in its valance shell.

2. It has one atom each in their molecules

3. It can combine with the element having valency 1.

4. Both B and C.

Q. The formula of a metal oxide is $M_2{O}_3$. If the metal forms its chloride, what will the formula of that compound be?

1. $M_{2}Cl$
2. $MC{l}_2$
3. $M_{3}Cl$
4. $MC{l}_3$

Q. Statement I: Two atoms of X combine with three atoms of Y to form ${\text{X}}_2{\text{Y}}_3$.

Statement II: From the chemical formula of the compound ${\text{X}}_2{\text{Y}}_3$, we can conclude that the valency of X is 2.

1. Statement I is true but II is false
2. Statement I is false but II is true
3. Both statements I and II are true
4. Both statements I and II are false.

Q. How many electrons are there in an atom of lithium?

1. 2
2. 4
3. 3
4. 8

Q. The valency of oxygen is .

1. 1
2. 3
3. 2
4. 6

Q. Sulphide, sulphate and sulphite are ions.

1. monovalent
2. divalent
3. trivalent