Q49Written answer
Draw the diagram showing micelle formation by the following detergent. CH3(CH2)10CH2OSO3-Na+
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NCERT Exemplar · Class 12 · Chemistry
Chapter 16: Chemistry in Everyday Life
Practice each question, then open the answer or worked solution.
II. Multiple Choice Questions (Type-II)
37 questionsQ50Written answer
How does the branching of the hydrocarbon chain of synthetic detergents affect their biodegradability?
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The lesser the branching, the lesser the non-polluting nature of the detergent and an increase in branching causes the polluting nature of the detergent to increase.
Q51Written answer
Why is it safer to use soap from an environmental point of view?
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When compared to detergents, soaps are safer to use and are biodegradable. It doesn’t have a polluting nature.
Q52Written answer
What are analgesics?
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The analgesic drug is a neurologically active drug which is used to reduce pain. They don’t have any side effects.
Q53Written answer
What is the scientific explanation for the feeling of depression?
Solution;
A hormone called Noradrenaline controls mood swings. Depression can be caused due to a low level of noradrenaline, which hampers the signal activities in the brain.
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Solution coming soon.
Q54Written answer
What is the basic difference between antiseptics and disinfectants?
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1. Antiseptics are applied to living tissues, whereas disinfectants are applied to non-living substances
2. Antiseptics are antimicrobial, whereas disinfectants are anti-microbial too
3. Antiseptics are applied on cuts or wounds, whereas disinfectants are used on floors, toilets etc.
Q55Written answer
Between sodium hydrogen carbonate and magnesium hydroxide, which is a better antacid and why?
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Magnesium hydroxide is a better antacid because it maintains a pH level in the stomach and is insoluble in the stomach. It does not make the stomach alkaline, whereas sodium hydrogen carbonate makes the stomach alkaline.
Class 12 Chemistry NCERT Exemplar Problems for Chemistry in Everyday LifeChemistry in Everyday Life is one of the easiest and most interesting chapters of CBSE Class 12. In this chapter, students will learn how chemical compounds are helping humanity to live and stay healthy.