Which of the following expressions correctly represents the equivalent conductance at infinite dilution of Al2(SO4)3 ? Given that and are the equivalent conductances at infinite dilution of the respective ions?
Match List I (Substances) with List II (Processes employed in the manufacture of the substances) and select the correct option.
List I (Substance) |
List II (Process) |
||
A. | Sulphuric acid | 1. | Haber's process |
B. | Steel | 2. | Bessemer's process |
C. | Sodium hydroxide | 3. | Leblanc 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 | 2 | 3 | 1 |
Which one of the following complexes is not expected to exhibit isomerism?
[Ni(NH3)4 (H2O)2]2+
[Pt(NH3)2Cl2]
[Ni(NH3)2Cl2]
[Ni(em)3]2+
A 0.1 molal aqueous solution of a weak acid is 30% ionised. If Kf for water is 1.86° C/m, the freezing point of the solution will be
-0.18C
-0.54C
-0.36C
-0.24C
A solid compound XY has NaCl structure. If the radius of the cation is 100 pm, the radius of the anion (Y- ) will be
275.1 pm
322.5 pm
241.5 pm
165.7 pm
Which of the following complex compounds will exhibit highest paramagnetic behaviour? (At. no. Ti= 22, Cr= 24, Co= 27, Zn= 30)
[Ti(NH3)6]3+
[Cr((NH3)6]3+
[Co(NH3)6]3+
[ZN(NH3)6]2+
The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.
C.
A slag is an easily fusible material which is formed when gangue still present in the roasted or the calcined ore combines with the flux. For example, in the metallurgy of iron, CaO (flux) combines with silica gangue to form easily fusible calcium silicate (CaSiO3) slag.