Chemistry in Our Daily Life

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. The food we eat are also chemical substances.

1. True
2. False

Q. Chemicals are used in textile industies.

1. False
2. True

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. Which of the following is suitable for coating dress materials of firefighters?

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

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

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

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 is a biodegradable waste?

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

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

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

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

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