No links please Q.19. (i) What is pseudo first order reaction, explain with example. (ii) Draw an energy profile diagram for exothermic reaction. (iii) Show that for a first order reaction the time required for 99.9% completion of the reaction is ten times of half life period.
For eg.
AgI + KI -> Negative Colloid
Here I- adsorbs on the surface of AgI.
I want some more examples like this.
Q71. The basicity of compounds I, II, III and IV
CH3NH2 (CH3)2NH (CH3)3N C6H5CH2NH2
I II III IV
varies in the order:
(a) I > II > III > IV (b) II > I > III > IV
(c) III > I > II > IV (d) IV > I > II > III
(n and k are constants and n > 1)
1. n
2.
3. log k
4. 2 k
Q.19. Two compounds I and II are eluted by column chromatography (adsorption of I > II). Which one of following is a correct statement?
1. II moves faster and has higher value than I
2. I moves faster and has higher value than II
3. I moves slower and has higher value than II
4. II moves slower and has higher value than I
Q.36. Which of the following electrolyte have maximum flocculation value for sol?
1) NaCl
2)
3)
4)
Q79. Mass of O2 that can be obtained from 500 ml 15 V H2O2 aqueous solution is_________.
(1) 6.42 gm (2) 2.675 gm
(3) 2.14 gm (4) 10.7 gm
(1) 0.25
(2) 2.5
(3) 250
(4) 0.025
6. Arsenic (Ill) sulphide forms a sol with a negative charge.
Which of the following ionic substances should be most
effective in coagulating the sol ?
(a) KCI
(b) MgC12
(c)Al2(SO4)3
(d) Na3P04
7.Aluminium hydroxide forms a positively charged sol. Which
Of the following ionic substances should be most effective in
coagulating the sol?
a) NaCl
c) Fe2(S04)3
(b) caC12
(d) K3P04
Q. The colloidal sol of prefers to adsorb:
(a)
(b)
(c)
(d)
No links please
Q.19. (i) What is pseudo first order reaction, explain with example.
(ii) Draw an energy profile diagram for exothermic reaction.
(iii) Show that for a first order reaction the time required for 99.9% completion of the reaction is ten times of half life period.
Q.(ii) Write down differential rate equation for a first order reaction and prove that half life of a order reaction is independent of initial concentration of reactant.
Q.(ii) 0.387 gm of biopolymer when dissolved in 100 ml water at 27C shows an osmotic pressure of 4.2 atm. Find the molecular weight of polymer.