Give reasons for the following:
Rough surface of a catalyst is more effective than smooth surface.

Give reason for the following: Zeolites act as shape selection catalysts.

Give reason for the following. Weight of an object on Jupiter is more than that on the Earth.

Give reasons for the following , Alkances are more stable than silances .

Give reasons for the following: CH_2=CH^(Θ) is more basic than HC-=C^(Θ)

Which one of the following statements is wrong? a. Physical adsorption of gas directly related to its critical temperature. b. Chemical adsorption decreases regularly as the temperature is increased. c. Adsorption is an exothermic process. d. A solid with a rough surface is a better adsorbent than the same solid with a smooth surface.

A chain of length L is placed on a horizontal surface as shown in figure At any instant x is the length of chain on rough surface and the remaining portion lies on smooth surface limitlly x= 0 A horizontal force p is applied to the chain (as shown in figure) in the duration from x = 0 to x = L For chain to move with constant speed

Identify the correct order of steps in heterogeneous catalysis. (i) Adsorption of reactant molecules on the surface of the catalyst. (ii) Diffusion of reactant to the surface of the catalyst. (iii) Formation of reactions product on the catalyst surface. (iv) Diffusion of reactions product from the catalyst surface. (v) Formation of activated intermediate.

Give reason for each of the following: For ferric hydroxide sol the coagulating power of phosphate ion is more than chloride ion.

A: Evaporation of water is fast on the surface of moon as compared to earth. R: On the surface of moon temperature is much greater than the surface of earth.

(A) : A person can walk on a rough surface (R) : Reaction of the force applied by the man on the surface keeps him moving