Which of the following can be expected to influence the rate of a chemical reactions?
(I) The temperature at which it is carried out.
(II) The amount of each specific reactant present.
(III) The presence of a catalyst.

I only

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III only

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I and II only

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II and III only

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I,II and III

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Solution

The correct option is E I,II and III
$(i)$ Increase in temp increases reaction rate $.$
$(i i)$ Reactant concentration affect
Hence $,$ It's true $.$
$(i i i)$ Presence and absence both affect $.$
Hence $,$ option $E$ is correct $.$

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