Match List-I with List-II.List-I
(Test) List-II
(Identification) (A) Bayer's test (I) Phenol (B) Ceric ammonium nitrate test (II) Aldehyde (C) Phthalein dye test (III) Alcoholic-OH group (D) Schiff's test (IV) Unsaturation
Choose the correct answer from the options given below:
| List-I (Test) | List-II (Identification) |
|---|---|
| (A) Bayer's test | (I) Phenol |
| (B) Ceric ammonium nitrate test | (II) Aldehyde |
| (C) Phthalein dye test | (III) Alcoholic-OH group |
| (D) Schiff's test | (IV) Unsaturation |
Choose the correct answer from the options given below:
- (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
- (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
- (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
- (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
The Correct Option is D
Approach Solution - 1
To solve the given matching problem between different chemical tests and their identifications, we need to understand each test's purpose:
- Bayer's Test: This test is used to detect unsaturation, such as double or triple bonds in organic compounds. The test involves the use of potassium permanganate, which rapidly decolorizes in the presence of unsaturation. Therefore, Bayer's test is associated with unsaturation. So, (A)-(IV).
- Ceric Ammonium Nitrate Test: This test is used to identify alcohols. Alcohols, upon reaction with ceric ammonium nitrate, change the color of the reagent. Therefore, this test is used for identifying alcohols. So, (B)-(III).
- Phthalein Dye Test: This test is specifically used to detect the presence of the phenolic group in a compound. It's a characteristic test for phenols, which are compounds containing a phenolic -OH group. Therefore, this test corresponds to phenols. So, (C)-(I).
- Schiff's Test: This test is used to identify the presence of aldehydes. It involves the decolorization of Schiff's reagent to give a magenta or purple color when an aldehyde is present. Therefore, Schiff's test corresponds to aldehydes. So, (D)-(II).
Based on this analysis, the correct matching is: (A)-(IV), (B)-(III), (C)-(I), (D)-(II).
Approach Solution -2
To solve the given problem involving matching tests with their corresponding chemical identification, we need to understand the specific tests and what they identify in organic chemistry.
- Bayer's Test: This test is used for detecting unsaturation (presence of double or triple bonds) in organic compounds. It involves the use of alkaline potassium permanganate (\( \text{KMnO}_4 \)), which gets reduced and decolorized in the presence of unsaturated compounds. Hence, Bayer's test corresponds to unsaturation.
- Ceric Ammonium Nitrate Test: This is used to detect the presence of alcohols. Alcohols react with ceric ammonium nitrate to give a color change due to the formation of a red-colored complex. Therefore, this test identifies the alcoholic-OH group.
- Phthalein Dye Test: This test is specific for phenols. When a phenol is treated with phthalic anhydride in the presence of sulfuric acid, it forms a colored dye. Thus, the Phthalein dye test is used to identify phenol.
- Schiff's Test: This is a classic test for aldehydes. It involves the reaction of aldehydes with Schiff's reagent, which leads to a characteristic pink or magenta color. Hence, it is used to identify aldehyde.
Now, let's match List-I with List-II based on our understanding:
- (A) Bayer's test matches with (IV) Unsaturation.
- (B) Ceric ammonium nitrate test matches with (III) Alcoholic-OH group.
- (C) Phthalein dye test matches with (I) Phenol.
- (D) Schiff's test matches with (II) Aldehyde.
Therefore, the correct answer is:
(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
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