Which is known as Glauber's salt?
Na2 CO3
CuSO4 5H2O
FeSO4 7 H2O
Na2so4 10 H2O
In the pure state which is neutral to litmus?
Water
Acid
Alkali
Blood
Which is prepared by filtration followed by chemical treatment of water?
Distilled water
Rain water
Chlorinated water
Pipe borne water
Which does not react with cold or boiling water?
Aluminium
Sodium
Potassium
Calcium
Who confirmed that water is a compound of two elements, hydrogen and oxygen.
A. Lavoisier
Rutherford
Joseph Priestly
Albert Einstein
The reaction of cold water with_____________is comparitively less exothermic and vigorous
Magnesium
What are the substances which can rapidly absorb or remove from other substances?
Drying agent
Deliquescent crystals
Anhydrous substance
Efflorescent crystals.
Earth's surface covers approximately_____________% of water.
70
75
80
15
Above the earth's crust water is present as
Mist
Fog
River
Dew