Formula of Potassium permanganate is
K2MnO2
KMnO4
KMn2O2
KMnO8
The Scientist who prepared oxygen first in the laboratory is
Priestley
Lavoisier
Bohr
Pauli
The gas that possesses the smell of rotten egg is
HCl
H2S
NH3
CO2
A solution of common salt and water is called
Hypo
Brine solution
Soft water
Hard water
Boiling point of water on Celsius scale is
105°C
100°C
200°C
110°C
Water in the form of crystal is called
Crystalline hydride
Deuterium
Solid ice
Ice
The ratio in which hydrogen and oxygen are present in water by volume is
2:1
1:2
1:4
4:1
Basic oxide is
SO2
MgO
P2O5
The gas which turns a paper dipped in K2Cr2O7 to green is
SO3
O2
Hydrogen was first prepared in the laboratory by
Henry Cavandish
Neils Bohr
Einstein