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Solution - Concept of Ph Scale

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The pH of rainwater is 7.

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Draw neat and labelled diagram of pH scale.

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Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is

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(b) strongly alkaline?
(c) strongly acidic?
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(e) weakly alkaline?
Arrange the pH in increasing order of hydrogen-ion concentration.

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Fresh milk from cows have pH of 6. So how does the pH change when this milk is turned to curd?

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A milkman adds a very small amount of baking soda to fresh milk.
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