Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
Efflorescence is the phenomenon by which hydrated salts on exposure to dry air lose their water of crystallisation and crumble to powder.
APPEARS IN
संबंधित प्रश्न
Write the chemical name and formula of common salt.
What name is given to the common salt which is mined from underground deposits? How was this salt formed?
What happens when a concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved.
The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is:
Write the name and formula of one salt which contains:
Two molecules of water of crystallisation.
name two salts which are acidic.
You are asked to prepare hard water in your laboratory. Select a group from the following groups of salts, any salt of which you may dissolve in distilled water to obtain hard water.
(A) NaCl; Na2SO4; KCl
(B) NaCl; CaCl2; KCl
(C) CaCl2; CaSO4; MgSO4
(D) Na2SO4; CaSO4; MgSO4
State one observation for each of the following :
Lead nitric is heated strongly in a test tube.
Name gases which has a sour taste.
How is normal salt obtained? Give a suitable reaction.
