Surface Chemistry

Question 1

Why does physisorption decrease with increase in temperature

Answer 1

Physisorption is exothermic in nature. Therefore, in accordance with Le-Chateliere’s principle, it decreases with an increase in temperature. This means that physisorption occurs more readily at a lower temperature

Question 2

Inversion of cane sugar

Answer 2

The invertase enzyme converts cane sugar into glucose and fructose

Question 3

Formula of cane sugar

Answer 3

C12H22O11

Question 4

Conversion of glucose into ethyl alcohol

Answer 4

The zymase enzyme converts glucose into ethyl alcohol and carbon dioxide

Question 5

Conversion of starch to maltose

Answer 5

The diastase enzyme converts starch into maltose

Question 6

Conversion of maltose to glucose

Answer 6

The maltase enzyme converts maltose into glucose

Question 7

Decomposition of urea into ammonia and carbon dioxide

Answer 7

Enzyme urease catalyses this decomposition

Question 8

Conversion of proteins into peptides

Answer 8

Pepsin enzyme

Question 9

Conversion of milk into curd

Answer 9

Lacto bacilli enzyme present in curd

Question 10

Common activators

Answer 10

Na+, Mn2+, Co2+, Cu2+

Question 11

Size of colloidal particles

Answer 11

1 to 1000 nm

Question 12

Solid and Solid colloid forms

Answer 12

Solid Sol
Examples: Some coloured glasses and gem stones

Question 13

Solid Liquid Colloid forms

Answer 13

Sol
Examples: Paints, Cell fluids