Match the following: List - I List - II A. Solid dispersed in

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Which of the following is an example for heterogeneous catalysis reaction ?

  • 2SO2(g) + O2(g) NO(g) 2SO3 (g)

  • Hydrolysis of aqueous sucrose solution in the presence of aqueous mineral acid

  • 2H2O2 (l) Pt(s) 2H2O (l) + O2 (g)

  • Hydrolysis of liquid in the presence of aqueous mineral acid


52.

The disperse phase, dispersion medium and nature of colloidal solution (lyophilic or lyophobic) of 'gold sol' respectively are :

  • solid, solid, lyophobic

  • liquid, liquid, lyophobic

  • solid, liquid, lyophobic

  • solid, liquid, lyophilic


53.

Assertion (A) : A catalyst increases the rate of a reaction.

Reason (R) : In presence of a catalyst, the activation energy of the reaction increases.

The correct answer is

  • Both (A) and (R) are true and (R) is the correct explanation of (A).

  • Both (A) and (R) are true but (R) is not the correct explanation of (A).

  • (A) is true, but (R) is not true

  • (A) is not true, but (R) is true


54.

Which one of the following graphs represents Freundlich adsorption isotherm ?


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55.

Which of the following is not correct?

  • Milk is a naturally occurring emulsion

  • Gold sol is a lyophilic sol

  • Physical adsorption decreases with rise in temperature

  • Chemical adsorption is unilayered


56.

Which one of the following gives a straight line for Freundlich adsorption isotherm?

  • log xm vs log p

  • xm vs 1p

  • log xm vs log 1p

  • xm vsp


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57.

Match the following:
List - I List - II
A. Solid dispersed in liquid i. Emulsion
B. Liquid dispersed in liquid ii. Foam
C. Gas dispersed in liquid iii. Gel
D. Liquid dispersed in solid

iv. Sol

v. Aerosol

The correct match is

  • A - iv; B - i; C - ii; D - iii

  • A - iii; B - i; C - v; D - ii

  • A - iii; B - i; C - ii; D - iv

  • A - iv; B - i; C - v; D - iii


A.

A - iv; B - i; C - ii; D - iii

Among the given options, option a is the correct one.

The examples of colloidal systems are sols (solids in liquids), gels (liquids in solids), emulsions (liquids in liquids) and foams (gases in liquids) whereas aerosols are the colloidal system in which dispersed phase in liquid and dispersion medium is gas.


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58.

Gelly is a colloidal solution of

  • solid in liquid

  • liquid in solid

  • liquid in liquid

  • solid in solid


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59.

Which of the following is the most effective in causing coagulation of ferric hydroxide solution?

  • KCl

  • KNO3

  • K2SO4

  • K3[Fe(CN)6]


60.

Which of the following statements is not correct inrespect of chemisorption?

  • Highly specific adsorption

  • Irreversible adsorption

  • Multilayered adsorption

  • High enthalpy of adsorption


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