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Question

Consider the following statements :

(A) Both acids and bases change the colour of all indicators.
(B) If an indicator gives a colour change with an acid, it does not give a change with a base.
(C) If an indicator changes colour with a base, it does not change colour with an acid.
(D) Change of colour in an acid and a base depends on the type of the indicator. 

Which of these statements are correct?


A
All four
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B
A and D
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C
B, C and D
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D
Only D
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Solution

The correct option is D Only D
Some indicators cannot change colour for both acid and bases.

If is an indicator gives colour change for acid, it can give a colour change for a base also.

The colour change depends on the type of indicator.

Hence the correct option is D.

Science
NCERT
Standard VII

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