Q.

Given below are two statements:
Statement I: In the titration between strong acid and weak base methyl orange is suitable as an indicator.
Statement II: For titration of acetic acid with NaOH phenolphthalein is not a suitable indicator.
In the light of the above statements, choose the most appropriate answer from the options given below:
 

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a

Statement I is false but Statement II is true

b

Statement I is true but Statement II is false

c

 Both statement I and Statement II are True

d

Both statement I and Statement II are false

answer is D.

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Detailed Solution

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PH  range of  strong acid weak base reaction is form 4 to 7 and methyl range PH  range is 3.2 to 4.5 hence in strong acid weak base reaction methyl orange can be used. PH   range of weak acid strong base reaction is form 7  to 11 and PH  range of phenolphthalein  is 8.7 to 10.5. Hence phenolphthalein can be used. Statement I is correct II is false.

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