Question

Match List I with List II

Choose the correct answer from the options given below:

• A. A-I, B-II, C-III, D-IV
• B. A-II, B-III, C-IV, D-I
• C. A-III, B-IV, C-I, D-II
• D. A-IV, B-I, C-II, D-III

Answer 1

The Correct Option is B

To solve this problem, we need to match the tests in List-I with their correct observations in List-II. Let's analyze each test and its typical outcome:

1. Br₂ water test: This test is used to identify the presence of unsaturated compounds like alkenes and alkynes. When Br₂ reacts with such compounds, the reddish-orange color of bromine disappears. Thus, it matches with \(II\) (Reddish orange color disappears).
2. Ceric ammonium nitrate test: This test is typically used to detect alcohols. The presence of alcohol changes the color of the ceric ammonium nitrate reagent to red. Thus, it matches with \(III\) (Red color appears).
3. Ferric chloride test: This test is used for phenols. Phenols react with ferric chloride to produce a variety of colored complexes, often blue, green, violet, or red. Thus, it matches with \(IV\) (Blue, Green, Violet, or Red color appear).
4. 2, 4-DNP test: This is a test for carbonyl compounds (aldehydes and ketones). The test results in the formation of a yellow, orange, or red precipitate. Thus, it matches with \(I\) (Yellow orange or orange-red precipitate formed).

Based on the analysis above, the correct matching is:

• A-II: Br₂ water test - Reddish orange color disappears
• B-III: Ceric ammonium nitrate test - Red color appears
• C-IV: Ferric chloride test - Blue, Green, Violet, or Red color appear
• D-I: 2, 4-DNP test - Yellow orange or orange-red precipitate formed

The correct answer is: A-II, B-III, C-IV, D-I.

Answer 2

To solve the problem, we need to match each test in List I with the correct observation from List II. Let's analyze each test and its corresponding observation:

1. Br₂ water test:
   • In this test, bromine water is used. When it reacts with certain unsaturated compounds (like alkenes or phenols), the reddish-orange color disappears as bromine adds across the double bond or undergoes a reaction.
   • Thus, the observation is: II. Reddish orange colour disappears.
2. Ceric ammonium nitrate test:
   • This test is typically used to identify alcohols. Alcohols react with ceric ammonium nitrate to form a red complex.
   • So, the corresponding observation is: III. Red colour appears.
3. Ferric chloride test:
   • Phenols give a characteristic colored complex with ferric chloride, which can be blue, green, violet, or red depending upon the phenol's structure.
   • Therefore, the observation is: IV. Blue, Green, Violet or Red colour appear.
4. 2,4-DNP test:
   • This test is used to detect the presence of aldehydes and ketones, forming a yellow-orange or orange-red precipitate of a hydrazone derivative.
   • As such, the observation is: I. Yellow orange or orange red precipitate formed.

Based on these correct associations, the matched list is:

• A - II (Br₂ water test - Reddish orange colour disappears)
• B - III (Ceric ammonium nitrate test - Red colour appears)
• C - IV (Ferric chloride test - Blue, Green, Violet or Red colour appear)
• D - I (2,4-DNP test - Yellow orange or orange red precipitate formed)

The correct answer is thus: A-II, B-III, C-IV, D-I.