CBSE
The molarity of pure water is:
100
55.6
18
5.56
The correct order of solubility ofthe following compounds in water is
Ba(OH)2 < Mg(OH)2
BaCO3 > CaCO3
Ca(OH)2 Mg(OH)2
CaSO4 < MgSO4
The density of SO2 at STP is 2.86 kg m3. Its density at 819°C and 2 atmospheres is:
0.715 kg m-3
1.43 kg m-3
2.86 kg m-3
4.26 kg m-3
Deuterium oxide is used in nuclear reactor as
source of -particle
source of deuteron
moderator
fuel
Which of the following reactions depicts the reducing action of H2O2 ?
C6H6 + H2O2 C6H5OH + H2O
2I- + 2H+ + H2O2 I2 + H2O
2Mn + 6H+ +5H2O2 2Mn2+ + 5O2 + 8H2O
PbS + 4H2O2 PbSO4 + 4H2O
H2O2 can be obtained when following reacts with H2SO4 except with
BaO2
PbO2
Na2O2
SrO2
H2O is polar, whereas BeF2 is not because
electronegativity of F is greaterthan that of O.
H2O involves H-bonding, whereas BeF2 is a discrete molecule
H2O is angular and BeF2 is linear
H2O is linear and BeF2 is angular.
Which of the following reactions increases the production of dihydrogen from synthesis gas?
Azeotropic mixture of HCl and water has:
20.2% HCl
22.2% HCl
63% HCl
84% HCl
Fenton's reagent is
NaOH + FeSO4
H2O2 + FeSO4
H2O2 + ZnSO4
H2O2 + MgSO4