The reactions of dioxygen require initiation by external heating but when the reaction starts, it continous on its own. Explain.

Chemical reaction require energy for

What is photorespiration and explain it with chemical reactions.

Reaction of diborane with ammonia initially gives-

A first order reaction takes 10min to complete 40% of the reaction. Another first order reaction requires 15min to complete 60% of the reaction. Calculate the ratio of the rate constants of the two reactions.

"Average rate of reaction does not give the true picture of the reaction -rate." Explain.

Half - life of a first order reaction is 15 min . Calculate rate constant of the reaction and the time required to complete 80% of the reaction. If the initial concentration of the reactant is doubled , how long will it take to reach 50% completion ? Give reason.

What is activation energy of a reaction? On heating the rate of a reaction because faster—explain.

For the reaction A+BhArr C+D , the equilibrium constant is K. what would be the value of the reaction quotient (Q), when the reaction just starts annd when it reaches equilibrium?

How long will it take for a zero order reaction to reach completion if the initial concentration of the reactant is 'a' and its rate constant is 'k' ? What is the half-life of this reaction?

Raw meterials required for light reactions are