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Hardness of Water:Causes, Types and Treatments

If water cont...

Question

If water contains dissolved calcium hydrogencarbonate, out of soaps and synthetic detergents which one will you use for cleaning clothes ?

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Solution

Synthetic detergents are preferred for cleaning clothes. When soaps are dissolved in water containing calcium ions, these ions form insoluble salts that are of no further use.

However, when synthetic detergents are dissolved in water containing calcium ions, these ions form soluble salts that act as cleansing agents.

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If water contains dissolved calcium hydrogen carbonate, out of soaps and synthetic detergents which one will you use for cleaning clothes ?

Q. (i) What class of drug is Ranitidine ?
(ii) If water contains dissolved

C a^{2 +} i o n s,

out of soaps and synthetic detergents, which will you use for cleaning clothes ?
(iii) Which of the following is an antiseptic ?
0.2% phenol, 1% phenol.

Q. (i) What class of drug in Ranitidine?
(ii) If water contains dissolved

C a^{2 +}

ions, out of soaps and synthetic detergents which will you use for cleaning clothes?
(iii) Which of the following is an antiseptic?

0.2

1

Q. Explain Why -

(a) Soap cannot be used in hard water .
(b) Oil does not mix in water . However, oil and water become homogeneous if a sufficient quantity of detergent is added .
(c) Synthetic detergents are superior to soap .
(d) Often coloured spots are formed on clothes during washing .
(e) Tobacco masheri should not be used for cleaning teeth.

Can you use soaps and synthetic detergents to check the hardness of water?

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Hardness of Water:Causes, Types and Treatments

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