Post 217
Question 7 When hard water is evaporated completely, the white solid remains in the container. It may be due o the presence of
1. Carbonatesof Ca and Mg
2. Sulphates of Ca and Mg
3. Chlorides of Ca and Mg
Select the correct answer using the code given below:
A) 1 and 2 only
B) 1,2 and 3
C) 3 only
D) 1 and 3 only
Answer: B is correct.
Explanation: Hard water contains all the three substances or you can say salts of Ca and Mg.
Question 7 When hard water is evaporated completely, the white solid remains in the container. It may be due o the presence of
1. Carbonatesof Ca and Mg
2. Sulphates of Ca and Mg
3. Chlorides of Ca and Mg
Select the correct answer using the code given below:
A) 1 and 2 only
B) 1,2 and 3
C) 3 only
D) 1 and 3 only
Answer: B is correct.
Explanation: Hard water contains all the three substances or you can say salts of Ca and Mg.
