Last seen: Mar 10, 2022
Adsorption is a surface phenomenon. Therefore, adsorption is directly proportional to the surface area. A finely divided substance has a large surface...
Physisorption: (i) In this type of adsorption, the adsorbate is attached to the surface of the adsorbent with weak van der Waal's forces of attracti...
Adsorption is a surface phenomenon of accumulation of molecules of a substance at the surface rather than in the bulk of a solid or liquid. The substa...
When a substance gets precipitated, some ions that combine to form the precipitate get adsorbed on the surface of the precipitate. Therefore, it becom...
Hardy-Schulze law states that 'the greater the valence of the flocculating ion added, the greater is its power to cause precipitation.' This law takes...
The role of desorption in the process of catalysis is to make the surface of the solid catalyst free for the fresh adsorption of the reactants on the ...
Ester hydrolysis can be represented as: Ester + Water → Acid + Alcohol The acid produced in the reaction acts as a catalyst and makes the reaction...
It is important to remove CO in the synthesis of ammonia as CO adversely affects the activity of the iron catalyst, used in Haber's process.
Powdered substances are more effective adsorbents than their crystalline forms because when a substance is powdered, its surface area increases and ph...
Physisorption is exothermic in nature. Therefore, in accordance with Le-Chateliere's principle, it decreases with an increase in temperature. This mea...
(i) Chemisorption is highly specific in nature. It occurs only if there is a possibility of chemical bonding between the adsorbent and the adsorbate. ...
For a first order reaction, t = log At 298 K, t = log = At 308 K, t' = log = According to the question, t = t' ⇒ = ⇒ = 2.7...
Correct answer: (a) (i) and (iv) Explanation: Addition reaction occurs on a double bond. The compound containing double bonds are also undergo pol...
Correct answer: (a) CH2 = CH2 Explanation: The heat of hydrogenation of an alkene depends upon its stability. Higher the stability, lower the heat...
Correct answer: (d) Surface area of Al2O3 Explanation: The amount of alcohol absorbed depends upon the surface area of Al2O3.
Correct answer: (d) Explanation: figure.png
Correct answer: (c) Explanation: figure.png
Correct answer: (3) + C Explanation: = put = t = - = . + C = + C
Correct answer: (2) (x, y) ∈ R ⇿ 0 < |x - y| ≤ 1 is symmetric and transitive. Explanation: Note that (1, 2) and (2, 3) satisfy 0 < |x – y| ≤...
Correct answer: (2) 7 + √3 Explanation: Let numbers be , a, ar → G.P , 2a, ar → A.P ⇒ 4a = + ar ⇒ r + = 4 r = 4th form of G.P = 3r2 ⇒ ...