Which of the following isotopes is present in largest amount?
O16
O17
O18
All in equal amounts
Oxalic acid when heated with conc. H2SO4 gives
CO, CO2 and H2O
CO2 and H2S
Oxalic sulphate
Oxygen is more electronegative than sulphur yet H2S is acidic while H2O is neutral. This is because.
Water is highly associated compound
H-S bond is weaker than H2O is neutral.
H2S is a gas while H2O is a liquid
The molecular weight of H2S is more than that of H2O
Bond angle in O3 molecule is
108o29'
108o28'
116o90'
120o
Which hydride is most acidic?
H2O
H2S
H2Te
H2Se
Platinised asbestos used as a catalyst in the manufacture of H2SO4 is an example of
Heterogenous catalysis
Autocatalysis
Homogeneous catalysis
Induced catalysis
Oxygen is prepared commercially from
Sodium and water
Electrolysis of water
KCIO3
HNO3
When H2S is passed through HNO3 solution, the product formed is
Milk of S
Colloidal S
Υ-S
β-S
Number of hydroxyl groups present in pyrosulphuric acid is
3
4
6
2
H2SO4 has very corrosive action on skin because
It reacts with proteins
It acts as dehydrating agent and absorption of water is highly exothermic
It acts as oxidizing agent
It has bleaching action
