Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Why does compound (A) given below not form an oxime?

                   (A)

How will you distinguish 1° and 2° hydroxyl groups present in glucose? Explain with reactions.

Assertion: D (+) – Glucose is dextrorotatory in nature.

Reason: ‘D’ represents its dextrorotatory nature.

Write the reactions of D-glucose which can’t be explained by its open-chain structure. How can cyclic structure of glucose explain these reactions?

On the basis of which evidences D-glucose was assigned the following structure?

\[\begin{array}{cc}
\ce{CHO}\\
|\phantom{....}\\
\phantom{..}\ce{(CHOH)4}\\
|\phantom{....}\\
\phantom{..}\ce{CH2OH}
\end{array}\]

Can nucleic acids, proteins and starch be considered as step growth polymers?

Which statement about aspirin is not true.

The compound that causes general antidepressant action on the central nervous system belongs to the class of ______.

Equanil is ______.

Which of the following statements are correct about barbiturates?

(i) Hypnotics or sleep producing agents.

(ii) These are tranquilizers.

(iii) Non-narcotic analgesics.

(iv) Pain reducing without disturbing the nervous system.

Veronal and luminal are derivatives of barbituric acid which are:

(i) Tranquilizers

(ii) Non-narcotic analgesic

(iii) Antiallergic drugs

(iv) Neurologically active drugs

Write the uses of medicines.

Which class of drugs is used in sleeping pills?

What are analgesics?

Which analgesics are called opiates?

What is the medicinal use of narcotic drugs?

With the help of an example explain how do tranquilizers control the feeling of depression?

Account for the following:

N-ethylethanamine boils at 329.3 K and butanamine boils at 350.8 K, although both are isomeric in nature.

What happens when reactions:

N-ethylethanamine reacts with benzenesulphonyl chloride.

What happens when D-glucose is treated with the following reagent?

HI