NCERT Solutions for Class 12 Chemistry Chemistry Part-2 Chapter 16

Chemistry in Everyday Life Class 12

Chapter 16 Chemistry in Everyday Life Exercise Solutions

<< Previous Chapter 15 : Polymers

In text : Solutions of Questions on Page Number : 448

Q1 :  

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?


Answer :

Most drugs when taken in doses higher than recommended may cause harmful effects and sometimes, may even lead to death. Hence, a doctor should always be consulted before taking any medicine.

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Q2 :  

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


Answer :

The given statement refers to the classification of pharmacological effects of the drug. This is because any drug that is used to counteract the effects of excess acid in the stomach is called an antacid.

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Q3 :  

Why do we require artificial sweetening agents?


Answer :

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Q4 :  

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

(i)

(ii)


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Q5 :  

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.


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<< Previous Chapter 15 : Polymers

Exercise : Solutions of Questions on Page Number : 454

Q1 :  

Why do we need to classify drugs in different ways?


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Q2 :  

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


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Q3 :  

Name the macromolecules that are chosen as drug targets.


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Q4 :  

Why should not medicines be taken without consulting doctors?


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Q5 :  

Define the term chemotherapy.


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Q6 :  

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


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Q7 :  

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


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Q8 :  

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


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Q9 :  

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


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Q10 :  

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


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Q11 :  

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


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Q12 :  

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


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Q13 :  

What are the main constituents of dettol?


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Q14 :  

What is tincture of iodine? What is its use?


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Q15 :  

What are food preservatives?


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Q16 :  

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


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Q17 :  

What are artificial sweetening agents? Give two examples.


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Q18 :  

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


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Q19 :  

What problem arises in using alitame as artificial sweetener?


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Q20 :  

How are synthetic detergents better than soap?


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Q21 :  

Explain the following terms with suitable examples

(i) Cationic detergents

(ii) Anionic detergents and

(iii) Non-ionic detergents


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Q22 :  

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


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Q23 :  

Why do soaps not work in hard water?


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Q24 :  

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


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Q25 :  

Explain the cleansing action of soaps.


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Q26 :  

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


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Q27 :  

Label the hydrophilic and hydrophobic parts in the following compounds.

(i)

(ii)

(iii)


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<< Previous Chapter 15 : Polymers

Chemistry Part-2 - Chemistry : CBSE NCERT Exercise Solutions for Class 12th for Chemistry in Everyday Life will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

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