Home | | Science 9th std | One Mark Questions Answers

Applied Chemistry | Chemistry | Science - One Mark Questions Answers | 9th Science : Chemistry : Applied Chemistry

Chapter: 9th Science : Chemistry : Applied Chemistry

One Mark Questions Answers

Science : Chemistry : Applied Chemistry : Book Back Important Questions, Answers, Solutions : I. Choose the correct answer, II. Fill in the blanks, III. State whether true or false. If false, correct the statement, IV. Match the following, V. Assertion and reason type questions

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


Tags : Applied Chemistry | Chemistry | Science , 9th Science : Chemistry : Applied Chemistry
Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail
9th Science : Chemistry : Applied Chemistry : One Mark Questions Answers | Applied Chemistry | Chemistry | Science


Privacy Policy, Terms and Conditions, DMCA Policy and Compliant

Copyright © 2018-2023 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.