English

What Are the Causes for Permanent Hardness - Chemistry

Advertisements
Advertisements

Question

What are the causes for

Permanent hardness

One Line Answer
Advertisements

Solution

The presence of sulphates and chlorides of magnesium and calcium makes water permanently hard.

shaalaa.com
Classification of water: Soft and Hard Water
  Is there an error in this question or solution?
Chapter 3: Water - Exercise 3 (C) [Page 52]

APPEARS IN

Selina Concise Chemistry [English] Class 9 ICSE
Chapter 3 Water
Exercise 3 (C) | Q 9.2 | Page 52

RELATED QUESTIONS

What do you understand by

Temporary hard water


What do you understand by

Permanent hard water


What are the causes for:

Temporary hardness


How will you distinguish between temporary hard water and permanent hard water?


Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you distinguish between temporary hard water and permanent hard water?


Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you remove temporary hardness and permanent hardness from water using a chemical compound?


Both temporary & permanent hardness in water can be removed by addition of washing soda. Give balanced equations for the same.


State what are synthetic detergents. Explain experimentally how you will determine the advantage of synthetic detergents over soap using a sample of hard water.


Select the correct answer from the choice given in the options.

A substance which causes hardness in water _____.


Name or state the following:

A substance added to remove both temporary and permanent hardness in water.


Soap lathers well in hard water.


Match the following.

Universal solvent Water pollutant
Hard water Kills germs
Boiling Ozonisation
Sterilization Water
Sewage Stomach ailments

Give a reason for the following.

Hard water is not good for washing utensils.


What are the causes of temporary hardness and permanent hardness of water?


Why does hard water not form lather with soap?


Which water is hard?


Which water is soft?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×