Chemistry in Our Daily Life

Q.

Differentiate between exhaustible and inexhaustible resources.

Q.

What are natural fibers? Give examples?

Q.

In which of the following reaction hydrogen peroxide is a reducing agent?

1. 2FeCl₂ + 2HCl + H₂O₂→ 2FeCl₃ + 2H₂O

2. Cl₂ + H₂O₂→ 2HCl + O₂

3. HI+ H₂O₂→ 2H₂O + I₂

4. H₂SO₃ + H₂O₂ → H₂SO₄+ H₂O

Q.

Which of the following is not an animal fiber?

1. silk

2. wool

3. polyester

4. pashmina

Q. Which amongst the following is the correct order for the given types of coal in terms of their carbon content?

1. Anthracite < bituminous coal < lignite < peat
2. Peat < lignite < bituminous coal < anthracite
3. Peat < bituminous coal < lignite < anthracite
4. Peat < anthracite < lignite < bituminous coal

Q. _______ can be used as a starting material in the manufacturing of perfumes.

1. Coal tar
2. Coal gas
3. Coke
4. Coal

Q.

Modern non-stick cookware and the flat end of an electric iron has a coating of a polymer. Identify the name of the polymer.

1. PVC

2. Polyester

3. Teflon

4. Rayon

Q. Identify the fibres that are made by chemicals processes.

1. Nylon
2. Jute
3. Wool
4. Polyester

Q. Coke is obtained by the destructive distillation of _______.

1. coal
2. petroleum
3. natural gas
4. biogas

Q.

How many substances are found in coal tar ?

Q. When is treated with sodium hydroxide, a compound which is used as an antacid is produced.

1. carbonic acid
2. carbon dioxide
3. sodium carbonate

Q. Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Which among the following is (are) true about slaking of lime?
(i) It is an endothermic reaction
(ii) It is an exothermic reaction
(iii) The pH of the resulting solution will be more than seven
(iv) The pH of the resulting solution will be less than seven

1. (i) and (ii)
2. (ii) and (iii)
3. (i) and (iv)
4. (iii) and (iv)

Q. Which amongst the following is the most commonly used raw material to make plastic water bottles?

1. Melamine
2. PET
3. PVC
4. Bakelite

Q.

11. Write two examples of the fibres which are obtained from animals.

Q. Chemicals are used in textile industies.

1. False
2. True

Q.

What are Natural Fibers? Give examples.

Q. Take an aqueous sodium bicarbonate solution in a test tube and heat it above ${80}^{o}C$. What do you observe if the evolved gas is passed through lime water?

1. It remains uneffected
2. It turns red in colour
3. It turns milky white
4. It becomes milky white in colour

Q. Which of the following is a biodegradable waste?

1. Glass
2. Metal scrap
3. Food waste
4. Plastic

Q. Which among the following is a greenhouse gas?

1. Hydrogen
2. Oxygen
3. Methane
4. Nitrogen

Q. Classify the following resources as exhaustible and inexhaustible:​
Forest, water, vegetation, natural gas, air, sunlight, and coal

Q. The food we eat are also chemical substances.

1. True
2. False

Q. Which among the following is also known as artificial wool?

1. Nylon
2. Rayon
3. Polyester
4. Acrylic

Q. Which amongst the following does not belong to the 4R principle?

1. Renovate
2. Recycle
3. Reuse
4. Reduce

Q. Which of the following fibre is obtained by chemical treatment of wood pulp?

1. Silk
2. Nylon
3. Rayon
4. Polyester

Q. Arrange the following in the decreasing order of greenhouse gas emissions.

1. LNG
2. CNG
3. Coal
4. Diesel
5. Petrol

Q. Arrange the following in the decreasing order of greenhouse gas emissions.

1. Diesel
2. Coal
3. CNG
4. LNG
5. Petrol

Q.

Name a greenhouse gas produced due to combustion of fossil fuels. Mention its bad effect to the environment.

Q. Arrange the following in the decreasing order of greenhouse gas emissions.

1. Coal
2. LNG
3. Diesel
4. Petrol
5. CNG

Q. Arrange the following in the decreasing order of greenhouse gas emissions.

1. CNG
2. LNG
3. Petrol
4. Coal
5. Diesel

Q. Which one of the following is a thermosetting plastic?

1. Polyethene
2. Acrylic
3. Bakelite
4. PET