Important Questions of Surface Chemistry Chemistry | Zigya

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21.

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


22.

List I contains the type of colloid while List II contains the examples.
List I List II
A. Sol p. Dust
B. Aerosol q. Cheese
C. Gel r. Soap lather
D. Foam s. Plant cell fluid

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


23.

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


24.

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

  • Sulphur sol in water

  • Aqueous starch sol

  • Aqueous enzyme sol

  • Alcoholic polystyrene sol


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25.

The disease kalaazar is cured by

  • colloidal antimony

  • milk of magnesia

  • argyrols

  • colloidal gold


26.

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


27.

Associated colloid among the following is

  • sodium stearate

  • enzymes

  • proteins

  • cellulose


28.

The dispersed phase and dispersion medium in soap lather are respectively

  • gas and liquid

  • liquid and gas

  • solid and gas

  • solid and liquid


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29.

In petrochemical industry, alcohols are directly converted to gasoline by passing over heated

  • platinum

  • ZSM-S

  • iron

  • nickel


30.

The ion that is more effective for the coagulation of As2S3 sol is

  • Al3+

  • Ba2+

  • Na+

  • SO42-


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