Science (English Medium) Class 12 - CBSE Question Bank Solutions for Chemistry

Assertion: Polytetrafluoroethene is used in making non-stick cookwares.

Reason: Fluorine has highest electronegativity.

Low density polythene and high density polythene, both are polymers of ethene but there is marked difference in their properties. Explain.

Which of the following statements is not correct.

A narrow spectrum antibiotic is active against ______.

Compound which is added to soap to impart antiseptic properties is ______.

Compounds with antiseptic properties are:

(i) \[\ce{CHCl3}\]

(ii) \[\ce{CHI3}\]

(iii) Boric acid

(iv) 0.3 ppm aqueous solution of \[\ce{Cl2}\]

Which of the following are sulpha drugs?

(i) Sulphapyridine

(ii) Prontosil

(iii) Salvarsan

(iv) Nardil

Which of the following are antidepressants?

(i) Iproniazid

(ii) Phenelzine

(iii) Equanil

(iv) Salvarsan

Which of the following statements are incorrect about penicillin?

(i) An antibacterial fungus.

(ii) Ampicillin is its synthetic modification.

(iii) It has bacteriostatic effect.

(iv) It is a broad-spectrum antibiotic.

What is the average molecular mass of drugs?

What are antiseptics?

Which type of drugs come under antimicrobial drugs?

What is the harmful effect of hyperacidity?

What is the commonality between the antibiotic arsphenamine and azodye?

Aspirin is pain relieving antipyretic drug but can be used to prevent heart attack. Explain.

What is the scientific explanation for the feeling of depression?

What is the basic difference between antiseptics and disinfectants?

Between sodium hydrogen carbonate and magnesium hydroxide which is a better antacid and why?

What is the mode of action of antimicrobial drugs?

Match the medicines given in Column I with their use given in Column II.