dhoran 6 samajik vigyan path 6 swadhyay ,std 6 social science ch 6 swadhyay solution, મૌર્ય યુગ ચંદ્ર ગુપ્ત અને સમ્રાટ અશોક

Bottles containing C_(6)H_(5)I and C_(6)H_(5)-CH_(2)I lost their original lables. They were labelled A and B for festing. A and B were separately taken in a test tube and boiled with NaOH solution. The end solution in each tube was made acidic with dilute HNO_(3) and then some AgNO_(3) solution was added. Substance B gave a yellow precipitate. Which one of the following statements is true for this experiment.

500mL of 0.2M aqueous solution of acetic acid is mixed with 500mL of 0.2HCI at 25^(@)C . a. Calculate the degree of dissociation of acetic acid in the resulting solution and pH of the folution. b. If 6g of NaOH is added to the above solution determine the final pH.[K_(a) of CH_(3)COOH =2 xx 10^(-5) .

1 litre of 1M CH_(3)COOH (very weak acid) taken in a container initially. Now this solution is diluted upto volumen V (litre) so that pH of the resulting solution becomes twice the original value. (K_(a) (CH_(3)COOH) = 10^(-6)) . Now equal volume of 0.5 xx 10^(-6)M NaOH solution is added to this resulting solution, so that a buffer solution is obtained. Find pH of final solution (log 3 = 0.477 ).