Which of the following is known as dead burnt?
Gypsum
Plaster of Paris
Anhydrite
None of these
C.
Anhydrite
The anhydrous CaSO4 is called dead burnt plaster because it does not set like plaster of Paris when moistened with water.
The hydrolysis of sodium carbonate involves the reaction between
sodium ion and water
Na+ and OH-
Potassium metabisulphite is a(an)
preservative
antioxidant
artificial sweetener
Both (a) and (b)
When Zn is treated with excess of NaOH, the product obtained is
Zn(OH)2
ZnOH
Na2ZnO2
None of the above
Solubility of which among the following substances in water increases slightly with rise in temperature?
Potassium bromide
Potassium chloride
Potassium nitrate
Sodium nitrate
When potassium is reacted with water which compound(s) is are formed preferentially?
K2O
KO2
Both K2O and KO2
K2O2