`sucrose overset(hydrolysis)rarr A+B overset(seliwanoff)underset(reagent)rarr`
which color is obtained after above reaction?

Options

A. Red
B. Violet
C. Blue
D. Black

Answer

To solve the question, we need to follow these steps:

### Step 1: Understand the Hydrolysis of Sucrose
Sucrose, a disaccharide, undergoes hydrolysis to yield two monosaccharides: glucose and fructose.

**Hint:** Remember that hydrolysis involves the breaking of a glycosidic bond in the presence of water.

### Step 2: Identify the Products
After hydrolysis, we have:
- A = Glucose (an aldose)
- B = Fructose (a ketose)

**Hint:** Recall that glucose has an aldehyde group while fructose has a ketone group.

### Step 3: Understand the Seliwanoff Test
The Seliwanoff test is used to differentiate between aldoses and ketoses. The reagent used consists of concentrated HCl and resorcinol.

**Hint:** The Seliwanoff reagent reacts differently with aldoses and ketoses.

### Step 4: Analyze the Reaction
When glucose (aldose) is treated with the Seliwanoff reagent, it produces a faint pink color. In contrast, fructose (ketose) reacts to give a cherry red color.

**Hint:** Focus on the color changes associated with each type of sugar when treated with the reagent.

### Step 5: Determine the Final Color
Since the hydrolysis of sucrose yields both glucose and fructose, the resulting mixture will produce a cherry red color due to the presence of fructose.

**Hint:** The presence of fructose is key to determining the final color in this reaction.

### Conclusion
The color obtained after the reaction of sucrose hydrolysis followed by treatment with the Seliwanoff reagent is **red**.

**Final Answer:** The correct option is **red**.

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