Strong reducing behaviour of H3PO4 is due to
the presence of one -OH group and two P-H bonds
high electron gain enthalpy of phosphorous
the high oxidation state of phosphorus
the high oxidation state of phosphorus
Oxidation states of P in H4P2O5, H4P2O6, H4P2O7, are respectively
+3, +5, +4
+5, +3, +4
+5, +4,+3
+5, +4,+3
The correct order of increasing bond angles in
Cl2O < ClO2 < ClO2-
ClO2 <Cl2O< ClO2-
Cl2O < ClO2- < ClO2
Cl2O < ClO2- < ClO2
Match (I) substances with List (II) processes employed in the manufacture of the substances and select the correct option.
List I |
List II |
||
A |
Sulphuric acid |
1 |
Haber’s process |
B |
Steel |
2 |
Bessemer’s process |
C |
Sodium |
3 |
Lablanc process |
D |
Ammonia |
4 |
Contact process |
A |
B |
C |
D |
1 |
4 | 2 |
3 |
A |
B |
C |
D |
1 |
2 |
3 |
4 |
A |
B |
C |
D |
4 |
3 | 2 | 1 |
A |
B |
C |
D |
4 |
3 | 2 | 1 |
which of the following oxides is not expected to react with sodium hydroxide?
B2O3
CaO
SiO2
SiO2
B.
CaO
Generally, acids react with bases and bases (alkalies) react with acids.
sodium hydroxide, NaOH, being a strong alkali, never react with a basic oxide (compound). Among the given options, B2O3 and BeO are amphoteric oxides, SiO2 is a acidic oxide and CaO is a basic oxide. Therefore, NaOH does not react with CaO.
The stability of +1 oxidation state increases in the sequence
Al < Ga <In < Tl
Tl < In <Ga< Al
In < Tl < Ga < Al
In < Tl < Ga < Al
Which one of the following arrangement does not give the correct picture of the trends indicated against it?
F2 > Cl2 > Br2 > I2 : Oxidising power
F2 > Cl2 > Br2 > I2 : Electron gain enthalpy
F2 > Cl2 > Br2 > I2 : Bond dissociation energy
F2 > Cl2 > Br2 > I2 : Bond dissociation energy
Which one of the following ionic species has the greatest proton affinity to form stable compound?
HS-
NH2-
F-
F-