18. Ionisation of which of the following will be maximum in water --. 1) Picric acid (2) Formic acid (3) Acetic acid 4) Benzoic acid.

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Q. How many of the following are stronger acids than benzoic acid?
p-toluic acid, p-hydroxybenzoic acid, acetic acid, formic acid, salicylic acid, phthalic acid, maleic acid:

Q. Value of dissociation constant of acetic acid is

10^{- 6}

, where as dissociation constant of formic acid is

10^{- 5}

. Which of the following will be the value of

p K a

(acetic acid) -

p K a

(formic acid)?

Value of dissociation constant of acetic acid is $10^{- 6}$ , where as dissociation constant of formic acid is $10^{- 5}$ . Which of the following will be the value of pK $_{a}$ (acetic acid) - pK $_{a}$ (formic acid)
a)10
b)1
c) $10^{- 1}$
d)-1

Q. If formic acid, acetic acid, propionic acid and benzoic acid is mixed with phosphorous and bromine then how many products are formed?

Q. The ionisation constant of an acid,

K_{a}

is the measure of strength of an acid. The

K_{a}

values of acetic acid, hypochlorous acid and formic acid are

1.74 \times 10^{- 5}, 3.0 \times 10^{- 8}

and

1.8 \times 10^{- 4}

respectively. Which of the following orders of pH of

0.1

mol

d m^{- 3}

solutions of these acids is correct?

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