Ncert Exercises & Solutions

Assertion(A): Deoxyribose, $C_{5} H_{10} O_{4}$ , is not a carbohydrate.

Reason(R): Carbohydrates are hydrates of carbon so compounds that follow $C_{x} {(H_{2} O)}_{y}$ the formula are carbohydrates.

1. Assertion and reason both are correct statements and reason explain the assertion.

2. Both assertion and reason are wrong statements.

3. Assertion is the correct statement and reason is the wrong statement.

4. Assertion is the wrong statement and reason is the correct statement.

Hint: Deoxyribose is a carbohydrate.

The carbohydrates may be defined as optically active polyhydroxy aldehydes or ketones or the compounds which produce

such units on hydrolysis. Carbohydrates are hydrates of carbon so compounds that follow

C_{x} {(H_{2} O)}_{y}

the formula are carbohydrates is not always true. hence, it is not a correct statement.

Deoxyribose

C_{5} H_{10} O_{4}

is a carbohydrate. The structure is as follows:

= β-D-2-deoxyribose