Advertisements
Advertisements
प्रश्न
Explain why chlorine is used for sterilising drinking water supply.
Advertisements
उत्तर
Chlorine is a disinfectant used to sterilise the drinking water supply, killing disease-causing bacteria that the water or its pipes might contain.
APPEARS IN
संबंधित प्रश्न
From the list of the following salts choose the salt that most appropriately fits the
description is given in the following:
[AgCl, MgCl2, NaHSO4, PbCO3, ZnCO3, KNO3, Ca(NO3)2]
On heating this salt, a brown colored gas is evolved.
State whether the following statement is true or false:
Copper sulphate crystals are always wet due to the presence of water of crystallisation in them.
Name the raw material used for the production of caustic soda.
What happens when a concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved.
Give the names and formulae of any two salts. Also name the acids and bases from which these salts may be obtained.
Give one example of a salt which gives an aqueous solution having:
pH more than 7
Explain ‘salt hydrolysis’
name two salts which are acidic.
Define the following term:
Hygroscopy
Fill in the blank
___________ is the phenomenon by which hydrated salts on exposure to dry air, lose their water of crystallization and crumble to powder.
State what would you observe when :
The salt ferric chloride is exposed to the atmosphere.
Distinguish by a chemical test sodium carbonate and sodium sulphite.
Differentiate hydrate and anhydrous salts with examples.
The Salt Story
From: The New Indian Express 9 March 2021
The salt pans in Marakkanam, a port town about 120 km from Chennai are the third largest producer of salt in Tamil Nadu. Separation of salt from water is a laborious process and the salt obtained is used as raw materials for manufacture of various sodium compounds.
One such compound is Sodium hydrogen carbonate, used in baking, as an antacid and in soda acid fire extinguishers.
The table shows the mass of various compounds obtained when 1litre of sea water is evaporated.
| COMPOUND | FORMULA | MASS OF SOLID PRESENT /g |
| Sodium Chloride | NaCl | 28.0 |
| Magnesium Chloride | MgCl2 | 8.0 |
| Magnesium Sulphate | MgSO4 | 6.0 |
| Calcium Sulphate | CaSO4 | 2.0 |
| Calcium Carbonate | CaCO3 | 1.0 |
| TOTAL AMOUNT OF SALT OBTAINED | 45.0 | |
What is the pH of the acid which is used in the formation of common salt?
One of the constituents of baking powder is sodium hydrogencarbonate. The other constituent is :
The chemical name of plaster of Paris is ______.
Acids react with metallic oxides to produce ______.
Salt is ______ in nature.
How is normal salt obtained? Give a suitable reaction.
