Question

Which of the following represents a correct chemical formula? Name it.
(a) CaCl
(b) BiPO4
(c) NaSO4
(d) NaS

NCERT Class IX
Sciences - Exemplar Problems

Chapter 3. Atoms and Molecules

Answer 1

Thanks for asking the question.
The compound among these that has the correct chemical formula is BiPO4. Bismuth ortho phosphate. The other compounds do not have the valencies of all the elements fulfilled. The others should be CaCl2 that is calcium chloride, Na2SO4 that is sodium sulphate and Na2S that is sodium sulphide.
Hope it helps.

Answer 2

Answer:

CACL

Explanation:

cacl is the right option because it represents calcium chloride

and we bismuth phosphate but not with 4

same for sodium sulphate

and sodium sulphid

hope it helps