2NaOH + MgSO4 ------------› ?
MgO + Na2SO4
Mg(OH)2 + Na2SO4
Mg(OH)2 + Na2O
MgO + Na2O
Which of the following is not an acidic salt?
CuSO4
Na2CO3
ZnSO4
NH4NO3
Metals react with dilute acids to give metal salts and
Water
Oxygen
CO2
H2
Bleaching powder is
Calcium oxychloride
Calcium bicarbonate
Calcium hydride
Calcium oxide
Under what soil condition do you think a farmer would treat the soil of his fields with quick lime ?
when the soil becomes acidic
when the soil becomes basic
when the soil becomes neutral
when the soil becomes alkaline
The substance which indicates the presence of acid or base by change of its smell is known as :
household indicator
acid-base indicator
olfactory indicator
none of these
Bee-sting causes pain and irritation as it is
Acidic
Basic
Neutral
Salt
An acid used in the manufacture of glass is:
ascorbic acid
boric acid
phosphoric acid
tartaric acid
Carbondioxide in water forms _________
carbonic acid
carbon monoxide
acetic acid
caustic soda
Which is known as plaster of paris ?
CaSO4.5H2O
CaSO4.3H2O
CaSO4.3/2H2O
CaSO4.1/2H2O
