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13 Inorganic Chemistry Questions And Answers

5⟩ Explain A catalyst?

(a)always slows down the reaction

(b)always starts a rection that would not have ocurred at

all otherwise

(c)causes changes in the rate of the reaction

(d)changes the quantities of the products formed

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7⟩ Why we use sulphuric acid in the experiment of measure absorpance of K2Cr2O7 and KMnO4?

In case of Dichromate we use it to maintain the pH, otherwise

there is a mixture of Chromate and Dichromate. They donot

absorb at the same wavelength. So we cannot use Lambert-Beer's

Law.

For permanganate use of sulphuric acid is not for this reason

but to maintain the pH as in neutral or alkaline solution

permanganate get hydrolyzed to for manganese dioxide.

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