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Chemical Kinetics

Short Answer Type

171. Write the unit for specific rate constant for a second order reaction.

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172. What will be the shape of the curve of concentration of the reactant is plotted against time for a zero order reaction?

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173. Define activation energy of a reaction.

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174. Define half-life of a reaction.

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175. For the reaction Cl₂(g) + 2NO(g) → 2NOCl(g) the rate law is expressed as rate = k[Cl₂] [NO]².
What is the overall order of reaction?

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176. Express the rate of the following reaction in terms of disappearance of hydrogen in the reaction.
3H₂(g) + N₂(g) → 2NH₃(g)

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177. Wha t is meant by order of a reaction being zero?

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178. Is there any reaction for which reaction rate does not decrease with time?

Reaction that are auto catalytic can have their rate increase with time i.e. as the product is formes the product start to work as catalyst and increase the reaction.

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179. State the ‘rate law’ for the chemical reactions.

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180. The reaction A + B → C has zero order. What is the rate equation?

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