Hydrogen And Its Compounds Question 130
Question: Which of the following is/are hard water(s)
Options:
A) Water containing some potash alum
B) Water containing a few drops of HCl
C) Water containing common salt
D) Water containing calcium nitrate
Show Answer
Answer:
Correct Answer: A
Solution:
Water containing any cation other than $ NH_4^{+} $ and alkali metal is a hard water.
BETA
