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# NCERT solutions Chemistry Class 12 Part 2 chapter 16 Chemistry in Everyday Life

#### Chapters

NCERT Solutions for Chemistry Class 12 Part 1

## Chapter 16 - Chemistry in Everyday Life

#### Pages 448 - 453

Sleeping pills are recommended by doctors to the patients suffering from sleeplessness but it is not advisable to take its doses without consultation with the doctor, Why?

Q 1 | Page 448

With reference to which classification has the statement, ‘ranitidine is an antacid” been given?

Q 2 | Page 448

Why do we require artificial sweetening agents?

Q 3 | Page 450

Write the chemical equation for preparing sodium soap from Glyceryl palmitate . Structural formulae of the compounds are given below.

(C15H31COO)3C3H5 – Glyceryl palmitate

Q 4.1 | Page 453

Write the chemical equation for preparing sodium soap from glyceryl oleate . Structural formulae of the compounds are given below.

(C17H32COO)3C3H5 – Glyceryl oleate

Q 4.1 | Page 453

Following type of nom-ionic detergents are present in liquid detergents, emulsifying agents and wetting agents. Label the hydrophilic and hydrophobic parts in the molecule. Identify the functional group (s) present in the molecule.

Q 5 | Page 453

#### Pages 454 - 455

Why do we need to classify drugs in different ways?

Q 1 | Page 454

Explain the term target molecules or drug targets as used in medicinal chemistry.

Q 2 | Page 454

Name the macromolecules that are chosen as drug targets.

Q 3 | Page 454

Why should not medicines be taken without consulting doctors?

Q 4 | Page 454

Define the term chemotherapy.

Q 5 | Page 454

Which forces are involved in holding the drugs to the active site of enzymes?

Q 6 | Page 454

While antacids and antiallergic drugs interfere with the function of histamines, why do these not interfere with the function of each other?

Q 7 | Page 454

Low level of noradrenaline is the cause of depression. What types of drugs are needed to cure this problem? Name two drugs.

Q 8 | Page 454

What is meant by the term ‘broad spectrum antibiotics’? Explain.

Q 9 | Page 454

How do antiseptics differ from disinfectants? Give one example of each.

Q 10 | Page 454

Why are cimetidine and ranitidine better antacids than sodium hydrogen carbonate or magnesium or aluminium hydroxide?

Q 11 | Page 454

Name a substance which can be used as an antiseptic as well as disinfectant.

Q 12 | Page 454

What are the main constituents of dettol?

Q 13 | Page 454

What is tincture of iodine? What is its use?

Q 14 | Page 454

What are food preservatives?

Q 15 | Page 454

Why is use of aspartame limited to cold foods and drinks?

Q 16 | Page 454

What are artificial sweetening agents? Give two examples.

Q 17 | Page 454

Name a sweetening agent used in the preparation of sweets for a diabetic patient.

Q 18 | Page 454

What problem arises in using alitame as artificial sweetener?

Q 19 | Page 454

How are synthetic detergents better than soap?

Q 20 | Page 454

Explain the following terms with suitable examples Cationic detergents

Q 21.1 | Page 454

Explain the following terms with suitable examples - Anionic detergents

Q 21.2 | Page 454

Explain the following terms with suitable examples - Non-ionic detergents

Q 21.3 | Page 454

What are biodegradable and non-biodegradable detergents? Give one example of each.

Q 22 | Page 454

Why do soaps not work in hard water?

Q 23 | Page 454

Can you use soaps and synthetic detergents to check the hardness of water?

Q 24 | Page 454

Explain the cleansing action of soaps.

Q 25 | Page 454

If water contains dissolved calcium hydrogen carbonate, out of soaps and synthetic detergents which one will you use for cleaning clothes?

Q 26 | Page 455

Label the hydrophilic and hydrophobic parts in the following compounds.

CH3(CH2)10CH2OSO3 Na+

Q 27.1 | Page 455

Label the hydrophilic and hydrophobic parts in the following compounds.

Q 27.2 | Page 455

Label the hydrophilic and hydrophobic parts in the following compounds.

CH_3(CH_2)_16COO(CH_2CH_2O)_nCH_2CH_2OH

Q 27.3 | Page 455

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