Consider the following statements:
a. Both acids and bases change 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?
Consider the following statements:
a. Both acids and bases change 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?
The correct option is D Only d
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Phenolphthalein and turmeric gives no change in acidic solution
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China rose indicator turns to dark pink in acidic solutions and to green in basic solutions.
Explanation for incorrect options:
a) In the basic solution only, the turmeric indicator changes its colour from yellow to red. In acidic or neutral solutions, it does not show any change in colour.
b) and c)China rose indicator turns acidic solutions to dark pink and basic solutions to green.
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Phenolphthalein and turmeric gives no change in acidic solution
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China rose indicator turns to dark pink in acidic solutions and to green in basic solutions.
Explanation for incorrect options:
a) In the basic solution only, the turmeric indicator changes its colour from yellow to red. In acidic or neutral solutions, it does not show any change in colour.
b) and c)China rose indicator turns acidic solutions to dark pink and basic solutions to green.
