Analgesics

Q. Soaps are sodium or potassium salts of long chain fatty acids.

1. True
2. False

Q. The molecules that are sodium salts of long chain carboxylic acids are known as molecules.

1. fat
2. oil
3. soap

Q. Soaps are sodium or potassium salts of long chain ___ .

1. carboxylic acids
2. aldehydes
3. sulphonates
4. ketones

Q. Which chemical is used to whiten the wood pulp in paper industry?

1. Salt
2. Bleaching powder
3. Washing soda
4. Baking soda

Q. is an artificial food colouring agent.

1. Tartrazine
2. Saffron
3. Beetroot

Q.

Name the water-attracting ionic groups in (a) a soap (b) a detergent

Q. An artificial dye causes harmful effects like hair fall, skin and eye irritation.

1. True
2. False

Q. Find the molarity of 9.8 percent y mass of aqueous sulphuric acid. If the density is 1.04 gm/ml.

Q. is the chemical formula of bleaching powder.

1. ${\text{CaCO}}_3$
2. ${\text{Ca(OH)}}_2$
3. ${\text{Ca(NO}}_3{)}_2$
4. ${\text{CaOCl}}_2$
5. $\text{CaO}$
6. ${\text{CaCl}}_2$

Q. What are the harmful effects of artificial dyes? [3 marks]

Q. Detergents can be used only in hard water.

1. False
2. True

Q. The gas that causes the decomposition of bleaching powder is ________.

1. oxygen
2. nitrogen
3. carbon dioxide
4. argon

Q. The ionic end of soap dissolves in , while its carbon chain dissolves in .

1. water
2. oil
3. lather
4. acid

Q. Choose the areas where dyes are used.

1. Cloth industry
2. Salon
3. Signboards
4. Paints
5. Shoe polish
6. Drinking water
7. Colours
8. Mirror

Q. Burst the bubbles containing the uses of bleaching powder.

1. Textile industry
2. Laundry
3. Disinfectant
4. Oxidising agent
5. Paper industry
6. Degreasing metal
7. Soap industry
8. Glass industry