Acids and Bases

Acids are .........................

• Sour in taste

• Sweet in taste

• Salt in taste

• Bitter in taste

Base are ............

• sour in taste

• sweet in taste

• salt in taste

• bitter in taste

The substances that are used to test whether a substance is acidic or basic is called

• Indicator

• Acid

• Base

• Salt

Litmus paper (purple colour) in distilled water when added to an acid changes to

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The solution that does not change the colour of blue or red litmus paper is ...................

• Acidic solution

• Basic solution

• Neutral solution

• Indicator

Orange juice is having pH value 2.5. It is (a)   in nature.

Ocean water is having pH value 8. So it is (a)   in nature.

.................... is a natural indicator.

• Phenolphthalein

• Methyl orange

• Turmeric

• universal indicator

Phenolphthalein changes ................... colour is a solution with pH 8.

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Methyl Orange turn ................. in solution with pH 2.

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