Consider the following 0.1 N acids: I. Acetic acid II. Perchloric acid II, Chloroacetic acid IV. Hydrochloric acid What is the sequence of these in terms of their increasing acid strength in water?

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Q: 98 (CDS-I/2003)
Consider the following 0.1 N acids: I. Acetic acid II. Perchloric acid II, Chloroacetic acid IV. Hydrochloric acid What is the sequence of these in terms of their increasing acid strength in water?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,1,13,4,7,1,2

keywords: 

{'hydrochloric acid': [1, 0, 3, 0], 'acid strength': [0, 0, 1, 0], 'chloroacetic acid iv': [0, 0, 1, 0], 'perchloric acid ii': [0, 0, 1, 0], 'acetic acid ii': [0, 0, 1, 0], 'sequence': [0, 1, 0, 2], 'water': [65, 15, 80, 129]}

To determine the sequence of the given 0.1 N acids in terms of their increasing acid strength in water, let`s analyze each option.

Option 1 suggests that the sequence is I, III, IV, II. Acetic acid, which is option I, is a weak acid, so it cannot be the first in the sequence. Therefore, option 1 is incorrect.

Option 2 suggests that the sequence is II, I, III, IV. Perchloric acid, option II, is a strong acid, so it could be the first in the sequence. Acetic acid, option I, is a weak acid, so it would follow after perchloric acid. Chloroacetic acid, option III, is a relatively stronger acid than acetic acid, so it would be third in the sequence. Finally, hydrochloric acid, option IV, is a strong acid, so it should be the last in the sequence. Therefore, option 2 is a possibility.

Option 4 suggests that the sequence is III, II, IV, I. This sequence cannot be correct because hydrochloric acid, option IV, is a strong acid and should not be placed before acetic acid, which is a weak acid.

Therefore, option 3,