Chemistry
In the compound magnesium nitride (Mg3N2):
P — Mg is trivalent, N is divalent.
Q — Mg is divalent. N is trivalent.
R — Mg is divalent, N is divalent.
Which of the statements given above is/are true?
Only P
Only Q
Only R
Both P and Q
Chemical Compound
13 Likes
Answer
Only Q
Reason — The valency of elements in compound magnesium nitride (Mg3N2) is,
Hence, Mg is divalent and N is trivalent.
Answered By
5 Likes
Related Questions
Which of the following statements about a compound is incorrect ?
- A molecule of a compound has atoms of different elements.
- A compound cannot be separated into its constituent elements by physical methods of separation.
- A compound retains the physical properties of its constituent elements.
- The ratio of atoms of different elements in a compound is fixed.
Which of the following reactions is not correct according to the laws?
P4 + 5O2 ⟶ P4O10
C2H6 ⟶ CO2 + H2O
2Zn + O2 ⟶ 2ZnO
CH4 + 2O2 ⟶ CO2 + 2H2O
Copper shows variable valency and forms two different compounds with oxygen — Cu2O and CuO.
P — A is cuprous oxide, B is cupric oxide.
Q — A is cupric oxide, B is cuprous oxide.
R — A is copper (I) oxide, B is copper (II) oxide.
Only P
Only Q
Only R
Both P and R
The figure given below shows the molecule of an element, where 'a' denotes the atom with atomic mass 32.

P — Element is tetratomic with molecular mass 128.
Q — Element is octatomic with molecular mass 256.
R — Element is crown-shaped with molecular mass 256.
Only P
Only Q
Only R
Both P and R