What is hard water?
Hard water is water in which certain minerals are dissolved. Soap will not work up a lather in hard water. Instead it forms scum. Hardness can be either temporary or permanent. The former can be removed by boiling the water. To remove the latter we have to use water softeners which replaces the hardness-inducing magnesium and calcium ions with sodium ions
Related posts:
Do you know "Unique museum of police wireless sets."
General Knowledge
How does a thermometer work? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10...
General Knowledge
What is a volcano? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 1...
General Knowledge
Do you know "Tetra pack marvel".
Do you know
What is haemoglobin? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and...
General Knowledge
Who discovered blood circulation? Complete General Knowledge Question and Answer for Class 6, 7, 8, ...
General Knowledge
Do you know "Indian bravery showcased in Brighton museum".
General Knowledge
Which birds are good talkers?Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10...
General Knowledge
What is the pulse? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 1...
General Knowledge
Which animal abandons its babies very early? Complete General Knowledge Question and Answer for Clas...
General Knowledge
What is a tornado?Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 12...
General Knowledge
GK Question "What Is The Cause Of Waves In Water?" general knowledge book English 2021 current affai...
General Knowledge
Why do people wear black for mourning? Complete General Knowledge Question and Answer for Class 6, 7...
General Knowledge
GK Question "How Do Insects Perform Breathing?" general knowledge book English 2021 current affairs ...
General Knowledge
How many moons does Jupiter have? Complete General Knowledge Question and Answer for Class 6, 7, 8, ...
General Knowledge
Do you know “Crystal lingams of Ranbireshwar temple".
Do you know
What are the elements? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 a...
General Knowledge
What is half-life? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 1...
General Knowledge
When was the first round-the-world passenger service inaugurated? How many days did such trips take?
1st in the World
GK Question "For How Long Have The Cats Been Domesticated?" general knowledge book English 2021 curr...
General Knowledge
