Multiple Choice QuestionsThe orange coloured compound formed when H2O2 is added to TiO2 solution acidified with conc. H2SO4 is
Ti2O3
H2Ti2O8
H2TiO3
H2TiO4
How many mL of perhydrol is required to produce sufficient oxygen which can be used to completely convert 2 L of SO2 gas to SO3 gas?
10 mL
5 mL
20 mL
30 mL
Which property among the following is same for both hydrogen and deuterium molecules?
Bond energy
Melting point
Boiling point
Bond length
In which of the following reactions hydrogen is not liberated?
Reaction of fused NaOH with C
Reaction of NaOH with sulphur
Heating the concentrated NaOH with Si
Reaction of zinc with NaOH
Observe the following statements-
i. Heavy water is harmful for the growth of animals.
ii. Haevy water reacts with Al4C3 and forms deyterated acetylene.
iii. BaCl2.2D2O is an example of interstitial deuterate.
The correct statements are-
1 and 3
1 and 2
1, 2 and 3
2 and 3
Which of the following methods is used for the removal of temporary hardness of water?
Treatment with washing soda
Calgon method
lon-exchange method
Clark's method
Temporary hardness of water is removed in Clark's process by adding
caustic soda
calgon
borax
lime
D.
lime
The temporary hardness of water is due to the presence of bicarbonates of Ca and Mg. This may be removed by Clark's process. In this process, addition of calculated quantity of lime causes precipitation of CaCO3 as
Ca(HCO3)2 + Ca(OH)2 → 2CaCO3↓ +2H2O
and Mg(HCO3)2 + 2Ca(OH)2 → 2CaCO3↓ + Mg(OH)2 + 2H2O
On which of the following principles hydrogen bomb is based?
Nuclear fission
Nuclear fusion
Artificial radioactivity
Natural radioactivity
Switch
