The equivalent conductance at infinite dilution of a weak acid such as HF

• can be determined by extrapolation of measurements on dilute solutions of HCl, HBr and HI

• can be determined by measurement on very dilute HF solutions

• can best be determined from measurements on dilute solutions of NaF, NaCl and HCl

• is an undefined quantity

12.

For a reaction of type A + B $\to$products, it is observed that doubling concentration of A causes the reaction rate to be four times as great, but doubling amount of B does not affect the rate. The unit of rate constant is

• s^-1

• s^-1 mol L^-1

• s-1 mol^-1 L

• s s^-1 mol^-2 L^-2

A chemical reaction was carried out at 320 K and 300 K. The rate constants were found to be k₁ and k₂ respectively. Then

• k₂= 4k₁

• k₂ = 2k₁

• k₂= 0.25 k₁

• k₂=  0.5k₁

Across the lanthanide series, the basicity of the lanthanide hydroxides

• increases

• decreases

• first increases and then decreases

• first decreases and then increases

Frenkel defect is generally observed in

• AgBr

• Agl

• ZnS

• All of the above

Most crystals show good cleavage because their atoms, ions or molecules are

• weakly bonded together

• strongly bonded together

• spherically symmetrical

• arranged in planes

[Co(NH₃)₄Cl₂]NO₂ and [Co(NH₃)₄ClNO₂]Cl exhibit whcih type of isomerism?

• Geometrical

• Optical

• Linkage

• Ionisation

1. Which of the following compounds is not coloured?

• Na₂[Cu(Cl)₄]

• Na[Cd(Cl)₄]

• K₄[Fe(CN)₆]

• K₃[Fe(CN)₆]

Coordination number of Ni in [Ni(C₂O₄)₃]^4- is

• 3

• 6

• 4

• 5

Sterling silver is

• AgNO₃

• Ag₂S

• Alloy of 80% Ag+ 20% Cu

• AgCl