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Q.

Statement(I) : In the titration of Na2CO3 with HCl using methyl orange indicator, the volume of acid required is twice that of the acid required using phenolphthalein as indicator.Statement(II) : Two moles of HCl are required for the complete neutralisation of one mole of Na2CO3

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a

Both Statement 1 and Statement 2 are true

b

Statement 1 is true and Statement 2  is false .

c

Statement 1 is false and Statement 2 is true.

d

Both Statement 1 and Statement 2 are false.

answer is A.

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Detailed Solution

Na2CO3  +  2HCl →  2NaCl  + H2O + CO2,phenolphathalein is  used forNa2CO3  +  HCl →  NaHCO3  + NaCl
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