Which of the following is/are incorrect statement regarding glucose:

Options

A. glucose gives `+ve` tollen's test
B. glucose petaacetate can react with hyroxylamine which indicate the presence of free `-CHO` group
C. Amylopectin is a branched chain polmer of `alpha-D`- glucose unis, where branching occurs by `C_(1)-C_(6)` glycosidic linkage.
D. Glucose doesnot get oxidised by bromine water, becase bromine water is a mild oxidizing agent.

Explanation

To determine which statements regarding glucose are incorrect, let's analyze each statement one by one.

### Step 1: Analyze the first statement
**Statement 1:** "Glucose gives a positive Tollen's test."

- **Explanation:** Tollen's test is used to detect aldehydes and alpha-hydroxy ketones. Glucose, which has an aldehyde group in its structure, will give a positive result in this test.
- **Conclusion:** This statement is **true**.

### Step 2: Analyze the second statement
**Statement 2:** "Glucose pentacetate can react with hydroxylamine which indicates the presence of free CHO group."

- **Explanation:** Glucose can react with hydroxylamine to form an oxime, but when glucose is converted to glucose pentacetate, all the hydroxyl (OH) groups are replaced by acetate groups. This means that the aldehyde group is not free to react with hydroxylamine because the structure does not open up to expose the aldehyde group.
- **Conclusion:** This statement is **false**.

### Step 3: Analyze the third statement
**Statement 3:** "Amylopectin is a branched chain polymer of alpha-D-glucose units where branching occurs by C1-C6 glycosidic linkage."

- **Explanation:** Amylopectin is indeed a branched polymer made of alpha-D-glucose units. The linear chains are connected by C1-C4 glycosidic linkages, while the branching occurs at C1-C6 linkages.
- **Conclusion:** This statement is **true**.

### Step 4: Analyze the fourth statement
**Statement 4:** "Glucose does not get oxidized by bromine water because bromine water is a mild oxidizing agent."

- **Explanation:** Glucose can be oxidized by bromine water, which is a mild oxidizing agent, to form gluconic acid. Therefore, glucose does get oxidized when treated with bromine water.
- **Conclusion:** This statement is **false**.

### Final Conclusion
The incorrect statements regarding glucose are:
- Statement 2: "Glucose pentacetate can react with hydroxylamine which indicates the presence of free CHO group." (False)
- Statement 4: "Glucose does not get oxidized by bromine water because bromine water is a mild oxidizing agent." (False)

Thus, the answer is that there are **two incorrect statements**.

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