stion No 28 40 collodal solution of Agl is prepared by

1 3 and 4th point acche se samjha dijiye please or is question ka answer bhi bta dijiya 4 Which of the following is not correct 1 Activation of adsorbent increases the surface area for adsorption 2 Adsorption is surface phenomenon only 2 3 Adsorption of H and O on charcoal is chemical adsorption 4 Chemical adsorption is due to either covalent or ionic bonds

Gold number of starch is 25 The amount of 0 3125xa gm of starch is required to prevent coagulation of 100 ml of gold sol adding 10 ml of 10 NaCl solution if value of a is x then find value of 10x

What is the function of unmodified silica in SPE Select one O A To retain nonpolar species from aqueous solution B To retain polar species from organic matrices C To retain non polar species from aqueous solution D To retain polar and nonpolar species from organic matrices O E To retain polar species from aqueous solution

In an experiment it is found that at a constant temperature rate of adsorption of gas on solid surface follows the relation Rate surface area of solid A solid is taken in form of cube that has side length cm The total surface area of this cube is x cm and rate of adsorption of gas is r If this solid cube is divided equally into 10 2 cubes then total surface area available for adsorption becomes y cm and rat becomes r2 On the basis of above information select correct statement s x is 6 y is 6 0 x 104 6 x 104

Which one is correct order of coagulating value of electrolytes for a given Sb S3 sol 1 BaCl NaCl AICI 3 2 NaCl MgCl Al SO4 3 3 CaCl NaCI AICI3 4 Al SO4 3 CaCl NaCl 30 260

Which is an example of auto catalysis 1 Hydrolysis of methyl acetate acid catalysed 2 Oxidation of Na SO3 in presence of Na AsO3 3 Oxidation of oxalic acid by KMnO4 4 Formation of ammonia by Haber s process

3 1 2 cal K 4 2 77 cal K Which of the following is an example of 56 f homogeneous catalysis reaction NO g A 2SO g O2 g 2SO3 g B Hydrolysis of aqueous sucrose solution in presence of aqueous mineral acid C CH COOCH H O t CH COOH CH OH D CO g 2H g 1 A C 3 A D Cu ZnO Cr O s 2 A B C 4 A B D HCI 1 3 1 2 cal K CH OH A 2SO g O g B face 43427 4 2 77 cal K NO g 1 A C 3 A D 2SO3 g C CH COOCH H O CH COOH E CH OH D CO g 2H g Cu ZnO Cr O3 s 2 A B C 4 A B D CH O

2 2 Langmuir adsorption isotherm for the dissociative adsorption of D p partial pressure of D and k ratio of rate constants for adsorption and desorption is a 0 kp 1 kp b 0 k 1 kp c 0 kp 2 1 kp 2 d 0 1 2 P 1 kp s

Which one of the following is an incorrect statement for physisorption Question Type Single Correct Type N 1 It is reversible 2 It is multilayered English Review Q 3 It requires activation energy 4 It decreases with increasing temperature

A gaseous mixture of C H4 CH4 CO and N at 400 K 1 atm was added with excess of O subjected to sparking in a rigid container volume constant If pressure of CO obtained at 400 K in same volume is 0 9 atm and that of H O vapour is 0 8 atm If moles of C H and CH are equal then calculate the pressure of each gas in the original mixture 4 4