Freundlich adsorption isotherm is

• $\frac{\mathrm{x}}{\mathrm{m}}={\mathrm{kp}}^{1/\mathrm{n}}$

• $\mathrm{x}={\mathrm{mkp}}^{1/\mathrm{n}}$

• $\frac{\mathrm{x}}{\mathrm{m}}={\mathrm{kp}}^{-\mathrm{n}}$

• All of these

In ...... process, work is done at the expense of internal energy.

• isothermal

• isochoric

• adiabatic

• isobaric

Haber process is used for the production of which of the following?

• NH₃

• HNO₃

• H₂SO₄

• O₃

Which of the following is not true about a catalyst?

• Mechanism of the reaction in presence and absence of catalyst could be different.

• Use of catalyst cannot change the order of the reaction

• Catalyst enhances both forward and backwards reaction at equal rate.

• Catalyst participates in the reaction, but not consumed in the process.

In which one of the following properties, physiorption and chemisorption resemble each other?

• Force of attraction

• Enthalpy of adsorption

• Temperature effect

• Effect of surface area

List I contains the type of colloid while List II contains the examples.

Choose the correct match.

• A - s; B - r; C - p; D - q

• A - s; B - p; C - q; D - r

• A - r; B - s; C - q; D - p

• A - r; B - p; C - s; D - q

277.

Gold sol can be prepared by

• reduction of gold (Ill) chloride with formalin solution

• hydrolysis of gold (III) chloride

• oxidation of gold by aqua-regia

• peptization

Which one of the following is an example for multimolecular colloid?

• Sulphur sol in water

• Aqueous starch sol

• Aqueous enzyme sol

• Alcoholic polystyrene sol

The disease kalaazar is cured by

• colloidal antimony

• milk of magnesia

• argyrols

• colloidal gold

Which is correct about physical adsorption?

• High temperature and high pressure favour adsorption

• High temperature and low pressure favour adsorption

• Low temperature and high pressure favour adsorption

• Low temperature and low pressure favour adsorption