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Class 12
Chemistry :-NCERT Solution - Chemistry in Everyday Life.

Exercise1 Question 1
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?


Exercise1 Question 2
With reference to which classification has the statement, ranitidine is an antacid been given?


Exercise1 Question 3
Why do we require artificial sweetening agents?


Exercise2 Question 1
Why do we need to classify drugs in different ways?


Exercise2 Question 4
Why should not medicines be taken without consulting doctors ?


Exercise2 Question 6
Which forces are involved in holding the drugs to the active site of enzymes ?


Exercise2 Question 7
While antacids and anti allergic drugs interfere with the function of histamines, why do these not interfere with the function of each other ?


Exercise2 Question 8
Low level of noradrenaline is the cause of depression. What type of drugs are needed to cure this problem ? Name two drugs.


Exercise2 Question 9
What is meant by the term 'broad spectrum antibiotics'? Explain.


Exercise2 Question 10
How do antiseptics differ from disinfectants ? Give one example of each.


Exercise2 Question 11
Why are cimetidine and ranitidine better antacids than sodium hydrogencarbonate or magnesium or aluminium hydroxide ?


Exercise2Question 13
What are the main constituents of dettol?


Exercise2 Question 14
What is tincture of iodine ? What is its use ?


Exercise2 Question 15
What are food preservatives ?


Exercise2 Question 16
Why is use of aspartame limited to cold foods and drinks?


Exercise2 Question 17
What are artificial sweetening agents? Give two examples.


Exercise2 Question 19
What problem arises in using alitame as artificial sweetener?


Exercise2 Question 20
How are synthetic detergents better than soap?


Exercise2 Question 22
What are biodegradable and non-biodegradable detergents? Give one example of each.


Exercise2 Question 23
Why do soaps not work in hard water?


Exercise2 Question 24
Can you use soaps and synthetic detergents to check the hardness of water?


Exercise2 Question 26
If water contains dissolved calcium hydrogen carbonate, out of soaps and synthetic detergents which one will you use for cleaning clothes?