One Mark Questions Answers

APPLIED CHEMISTRY

TEXT BOOK EXERCISES

I. Choose the correct answer :

1. One Nanometre is

(a) 10^-7 metre

(b) 10^-8 metre

(c) 10^-6 metre

(d) 10^-9 metre

[Answer: (d) 10^-9 metre]

[Solution: 1 nanometre is also called one billionth of a metre]

2. The antibiotic Penicillin is obtained from _――― .

(a) plant

(b) microorganism

(c) animal

(d) sunlight

[Answer: (b) microorganism]

3. 1% solution of Iodoform is used as

(a) antipyretic

(b) antimalarial

(c) antiseptic

(d) antacid

[Answer: (c) antiseptic]

4. The cathode of an electrochemical reaction involves _――― .

(a) oxidation

(b) reduction

(c) neutralisation

(d) catenation

[Answer: (b) reduction]

[Solution: It involves gain of electrons]

5. The age of a dead animal can be determined by using an isotope of _――― .

(a) carbon

(b) iodine

(c) phosphorous

(d) oxygen

[Answer: (a) carbon]

[Solution: C₆¹⁴ isotope is used]

6. Which of the following does not contain natural dyes?

(a) Potato

(b) Beetroot

(c) Carrot

(d) Turmeric

[Answer: (a) Potato]

7. This type of food protect us from deficiency diseases.

(a) Carbohydrates

(b) Vitamins

(c) Proteins

(d) Fats

[Answer: (b) vitamins]

8. Radiochemistry deals with

(a) oxidants

(b) batteries

(c) isotopes

(d) nanoparticles

[Answer: (c) isotopes]

9. The groups responsible for the colour of an organic compound is called

(a) isotopes

(b) auxochrome

(c) chromogen

(d) chromophore

[Answer: (d) chromophore]

10. Chlorinated hydrocarbons are used as

(a) fertilizers

(b) pesticides

(c) food colourants

(d) preservatives

[Answer: (b) pesticides]

II. Fill in the blanks :

1. Electrolytic cell is an electrochemical cell which converts electrical energy into chemical change (Reaction).

2. Painkiller drugs are called Analgesics _.

3. Indigo is a Vat dye.

4. Nitrogen , Phosphorous and Potassium are macro nutrients required for plant growth.

5. Ninhydrin is a chemical used in finger print analysis.

III. Match the following :

Antipyretics - Large surface area

Corrosion prevention - Iodine-131

Hyperthyroidism - Fever

Nanoparticle - Body building

Proteins - Electroplating

Answer:

Antipyretics - Fever

Corrosion prevention - Electroplating

Hyperthyroidism - Iodine-131

Nanoparticle - Large surface area

Proteins - Body building