India

## Chemical Kinetics | Revision Notes | Chemistry | Class 12

Rate of Reaction: Rate of change of extent of reaction is the rate of reaction. Rate of reaction is positive for product and negative for reactant. For reaction aA →bB Rate =1/b(Δ[B]/ Δ t)  = -1/a (Δ [A]/ Δt) It goes on decreasing as the reaction progress due to decrease in Read more…

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## Ratio and Proportion | NCERT Solutions (Ex 12.3) | Class 6

Question 1. If the cost of 7 m of cloth is Rs. 294, find the cost of 5 m of cloth. Solution: Cost of 7 m of cloth = Rs. 294 ∴ Cost of 1 m of cloth = 294/7 = Rs. 42 ∴ Cost of 5 m of cloth = Read more…

## Evaporation | Class IX

The process of a liquid changing into vapour (or gas) even below its boiling point is called Evaporation. Whatever be the temperature at which evaporation takes place, the latent heat of vaporization must be supplied whenever a liquid changes into vapour (or gas). The process of evaporation can be explained Read more…

## Factors Affecting Adsorption of Gases on Solids | Class XII

(i) Nature of adsorbent Greater are the strained forces on the surface, more is the ease with which adsorption takes place on the surface. The activated adsorbents have high adsorbing power. (ii) Surface area of adsorbent Greater the surface area, more is the adsorption. (iii) Nature of gas being adsorbed Easily liquefiable Read more…