28 Apr 2022

Samacheer kalvi 7th Science Term 3 Unit 4 Answers

Samacheer Kalvi 7th Science Term 3 Unit 4 Book Back Questions and Answers:

Samacheer Kalvi 7th Standard Science Book Back 1 Mark and 2 Mark Question & Answers uploaded online and available PDF for free download. Class 7th New Syllabus Science Term III book back question & answer solutions guide available below for English Medium. Class Seventh Std Science English Medium Term 3 Unit 4 Chemistry in Daily Life book back answers are given below. Students looking for class 7th Term III Unit 4 Questions and Answers can check below.

We also provide class 7th other units Book Back One and Two Mark Solutions Guide on our site. Students looking for a new syllabus 7th standard Science Term 3 Unit 4 Chemistry in Daily Life Book Back Questions with Answer PDF:

For all three-term of 7th standard Science Book Back Answers English Medium – Samacheer kalvi 7th Science Book Back Answers

Samacheer Kalvi 7th Science Book Back Chapter 4 Term 3 Solutions Guide PDF:

TN State Board Class 7th Science Subject Term 3 Unit 4 one mark and two mark solutions guide PDF available below.

Science – Term 3

Unit 4 – Chemistry in Daily Life 

I. Choose the correct answers :

1. A drug effective in the treatment of pneumonia, and bronchitis, is ______
(a) Streptomycin
(b) Chloramphenicol
(c) Penicillin
(d) Sulphaguanidine
Answer: (c) Penicillin

2. Aspirin is ______
(a) Antibiotic
(b) Antipyretic
(c) Sedative
(d) Psychedelic
Answer: (b) Antipyretic

3. ______ are that neutralize stomach acid.
(a) Antacid
(b) Antipyretic
(c) Analgesic
(d) Antihistanics
Answer: (a) Antacid

4. The lowest temperature at which a substance catch fire is called its ______
(a) Boiling point
(b) Melting point
(c) Critical temperature
(d) Ignition temperature
Answer: (d) Ignition temperature

5. Which is the hottest part in the flame of a candle ______
(a) Blue
(b) Yellow
(c) Black
(d) Way part
Answer: (a) Blue

II. Fill in the blanks:

  1. Penicillin was first discovered by ______
  2. World ORS Day is ______
  3. Combustion is a chemical reaction in which and substance react with ______
  4. In the presence of water, the ignition temperature of paper is ______
  5. The fire produced by oil cannot be controlled by ______


  1. Alexander Fleming
  2. July 29
  3. oxidizing agent
  4. not reached
  5. water

III. True or False – If False, give the correct answer:

1. Antibiotics does work for viruses like cold and
Answer: (False)
Correct statement: Antibiotics do not work for viruses like cold and flu

2. Analgesics are substances that lower the temperature during a fever.
Answer: (False)
Correct statement: Antipyretics are substances that lower the temperature during a fever.

3. All fuels form a flame.
Answer: (False)
Correct statement: All fuels do not form a flame.

4. Oxygen is necessary for combustion.
Answer: True

5. Burning wood and coal causes the pollution of air.
Answer: True

IV. Match the following:

Question 1.

1. Antipyretic Reduce pain
2. Analgesic Reduce body temperature
3. Antacid Spontaneous combustion
4. Phosphorus ORS Solution
5. Carbon – dioxide This leads to respiratory problem


1. Antipyretic Reduce body temperature
2. Analgesic Reduce pain
3. Antacid ORS Solution
4. Phosphorus Spontaneous combustion
5. Carbon – di – oxide Leads to respiratory problems.

V. Analogy:

1. Inner zone of flame:: ______, outer zone of flame : : ________
Answer: Black, Blue

2. Tincture:: ______, Histamine : : _______
Answer: Antiseptic, Chemical messenger

VI. Very short answer :

1. First viral disease detected in human beings was: _____ (Yellow fever/dengue fever)
Answer: Yellow fever.

2. ______,:_______,:_______ are called greenhouse gases
Answer: CO, Methane, Chlorofluorocarbons

3. Name a substance that can be used as an antiseptic as well as a disinfectant.
Garlic, Turmeric, Aloe vera.

4. What are the main constituents of Dettol?
A mixture of chloroxylenol and terpineol

5. Name the unit in which the calorific value of a fuel is expressed.

6. How many types of combustion are there?

  1. Rapid combustion
  2. Spontaneous combustion
  3. Explosion

7. What are the essential requirements for producing fire?
Answer: Fuel, Heat, and Oxygen.

Other Important Links for the 7th Book Back Solution Guide:

Tamil Nadu Class 7th Standard Book Back Guide PDF, Click the link – 7th Book Back Questions & Answers PDF

Click here to download Samacheer Kalvi 7th Books in English and Tamil – Samacheer Kalvi 7th Books PDF

Leave a Reply

Your email address will not be published. Required fields are marked *