Question

which of the following represent a contact chemical formula?name it​

Answer 1

Answer:

option A - Cacl

option B - BiPO4

option C - NaSo4

option D- NaS

Valency of Ca is 2 and Cl is 1. Hence, the correct formula for calcium chloride is CaCl  

2

​  

. Option A is incorrect.

Valency of Bi is 3 and (PO  

4

​  

) i.e. phosphate ion is also 3. Hence, the formula of bismuth phosphate is BiPO  

4

​  

. Option (B) is the correct answer.

Valency of Na is 1 and sulphate, SO  

4

​  

 is 2. Hence, formula of sodium sulphate is Na  

2

​  

SO  

4

​  

. Option C is incorrect.

Valency of Na is 1 and sulphur is 2. Hence, the formula of sodium sulphide is Na  

2

​  

S. Option D is incorrect.