Which of the following isotopes is present in largest amount?
O16
O17
O18
All in equal amounts
In which reaction there is no change in the oxidation states?
SO2 + H2S → 2H2O + 3S
2Na + O → Na2O
Na2O2 + H2SO4 → Na2SO4 + H2O
4KCIO3 →3KCIO4 + KCI
Bond angle in O3 molecule is
108o29'
108o28'
116o90'
120o
The geometry of H2S and its dipole moment are
Angular and non-zero
Angular and zero
Linear and zero
Linear and non-zero
Which hydride is most acidic?
H2O
H2S
H2Te
H2Se
Which compound has bond angle nearly 90°?
NH2
SO2
Oxygen is prepared commercially from
Sodium and water
Electrolysis of water
KCIO3
HNO3
Number of hydroxyl groups present in pyrosulphuric acid is
3
4
6
2
Which metal sticks to a glass plate after treatment with ozone
Silver
Mercury
Copper
Lead
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
