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
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
C.
F2 > Cl2 > Br2 > I2 : Bond dissociation energy
Generally, bond dissociation energies decrease in a group. Bond dissociation energy also decreases with repulsion.
X-X Bond | F-F | Cl-Cl | Br- Br | I-I |
Bond length (A) | 1.42 | 1.99 | 2.28 | 2.67 |
Bond dissociation energy (kcal/mol) | 38 | 57 | 45.5 | 35.6 |
Which one of the following ionic species has the greatest proton affinity to form stable compound?
HS-
NH2-
F-
F-