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Question

Match the titration graphs
(1) NaOH + NH4OH vs HCl
(2) CH3 COOH vs NaOH
(3)HCl vs NaOH
(4)CH3 COOH vs NH4OH
a)

b)

c)

d)


A
1-(c) 2-(a) 3-(d) 4-(b)
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B
1-(b) 2-(c) 3-(d) 4-(a)
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C
1-(c) 2-(b) 3-(a) 4-(d)
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D
1-(b) 2-(a) 3-(d) 4-(c)
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Solution

The correct option is B 1-(b) 2-(c) 3-(d) 4-(a)

(NaOH + NH4OH) vs HCl:
As there is mixture of strong acid and weak base. Neutralisation happens in two steps. So the curve gets two breaks.

(ii) CH3 COOH vs NH4OH
(weak acid vs weak base)

(iii) HCl vs NaOH
(strong acid vs strong base)
For the titration of stong acid vs strong base at first the conductance decrease then it increases.

(iv) CH3 COOH vs NaOH
Weak acid vs strong base

Before addition of NaOH, the solution shows poor conductance due to low ionization of CH3COOH after addition of NaOH, CH3COOH is replaced by CH3COONa which is very strong conducting.


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