Hard water and soft water can be distinguished by using
A. Dilute acid
B. Ordinary soap
C. Detergent
D. Liquid soap
Answer: Option C
Solution (By Examveda Team)
Hard water and soft water can be distinguished by using detergent.This Question Belongs to General Knowledge >> Chemistry
Ordinary soap is right answer
The most suitable option is:
3) Ordinary soap
Here's why:
* Ordinary soap (bar soap) readily reacts with the minerals (calcium and magnesium) in hard water, forming a scum. This scum makes it difficult to lather the soap.
Wrong answer.
Right answer opt B ) ordinary soap as it will make foam in soft water but not in hard water
Answer should be ordinary soap
Answer should be D