Multiple Choice QuestionsMatch 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
Gelly is a colloidal solution of
solid in liquid
liquid in solid
liquid in liquid
solid in solid
Which of the following is the most effective in causing coagulation of ferric hydroxide solution?
KCl
KNO3
K2SO4
K3[Fe(CN)6]
Which of the following statements is not correct inrespect of chemisorption?
Highly specific adsorption
Irreversible adsorption
Multilayered adsorption
High enthalpy of adsorption
C.
Multilayered adsorption
If the chemical forces held the gas molecules to the surface of the adsorbent; the adsorption is termed as chemical adsorption (chemisorption). Since, activated chemisorbent involves a high degree of specificity, irreversibility and high enthalpy of adsorption. Multilayered adsorption occurs in physisorpton.
Colloidal solution of gold is in different colours like red, purple, blue and golden because of
variable oxidation states of gold
size difference in the particles of gold
presence of impurities
difference in the concentration of gold particles
The size of colloidal particles is in between
10-7 - 10-9 cm
10-9 - 10-11 cm
10-5 - 10-7 cm
10-2 - 10-3 cm
The stability of lyophilic colloids is due to which of the following?
Charge on their particles
Large size of their particles
Smaller size of their particles
A layer of medium of dispersion on their particles
Milk is
fat dispersed in water
water dispersed in fat
water dispersed in oil
fat dispersed in fat
What is the role of a catalyst in a catalysed reaction?
Lowers the activation energy
Increases the activation energy
Affects the free energy change
Affects the enthalpy change
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