Arrange the following compounds in order of increasing solubility
(i)MgF2
(ii)CaF2 ,
(iii)BaF2
Solution
BaF2 > MgF2 > CaF2
The order of solubility of sulphates of alkaline earth metals in water is
Alkaline earth’s metals are denser than alkali metals, because metallic bonding in alkaline earth’s metal, is
Solution
Metallic bonding in alkaline earth’s metals is stronger because of larger number of electrons in the outer shell in alkaline earth’s metal atoms
Which of the following is used widely in the manufacture of storage battery?
Solution
Lithium is widely used in the manufacture of storage battery.
Baking powder contains :
Solution
Baking powder has starch, NaHCO3 and Ca(H2PO2)2.
Which pair cannot exist together in solution ?
Solution
NaHCO3 and NaOH cannot exist together. NaHCO3 being acid salt will react with alkali to from normal salt.
Which of the following is commercially known as oxone ?
Solution
(Na2O2+ HCl) is commercially known as oxone and is used for bleaching of delicate fibres.
A certain metal M is used to prepare an antacid, which is used as a medicine in acidity. This metal accidently catches fire which cannot be put out by using CO2 based extinguishers. The metal M is
Solution
Magnesium hydroxide is used to prepare an antacid which is used as medicine. Hence, the metal M is Mg.
Which of the following compounds transforms baking soda into baking powder?
On strong heating sodium bicarbonate changes into:
