Question

Assertion: Deoxyribose, $C_5{H}_{10}{O}_4$ is not a carbohydrate.

Reason: Carbohydrates are hydrates of carbon so compounds which follow $C_x(H_{2}O{)}_y$ formula are carbohydrates.

• A. Assertion is wrong statement and reason is correct statement.
  
• B. Both assertion and reason are wrong statements.
• C. Assertion and reason both are correct statements and reason explains the assertion.
  
• D. Assertion and reason both are correct statements but reason does not explain assertion
• E. Assertion is a correct statement and reason is a wrong statement.
  

Answer 1

The correct option is B

Both assertion and reason are wrong statements.

Assertion

The carbohydrates may be defined as optically active polyhydroxy aldehydes or ketones or the compounds which produce such units on hydrolysis.

Deoxyribose, $C_5{H}_{10}{O}_4$ is a carbohydrate and is the sugar moiety of DNA.

So, the assertion is a wrong statement.


Reason

Most of the carbohydrates have general formula, $C_x(H_{2}O{)}_y$. But all the compounds which fit into this formula may not be classified as carbohydrates. For example, acetic acid $\left(C{H}_{3}COOH\right)$ fits into this general formula, $C_2(H_{2}O{)}_2$ but it is not a carbohydrate. Similarly, rhamnose, $C_6{H}_{12}{O}_5$ is a carbohydrate but does not
fit in this definition.

So, the reason is a wrong statement.

Hence, both assertion and reason are wrong statements.