Chemistry In Everyday Life(12th Grade > Chemistry ) Questions and answers for exam Preparation

12th Grade > Chemistry

CHEMISTRY IN EVERYDAY LIFE MCQs

Total Questions : 30 | Page 2 of 3 pages

Question 11. Assertion (A): Hard water forms sticky precipitate with soap.
Reason (R): Hard water contains calcium and magnesium ions

Both A and R are true and R is a correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true

Discuss Question

Answer: Option A. -> Both A and R are true and R is a correct explanation of A
:
A
Hard water contains calcium and magnesium ions which forms insoluble precipitate with soap which are sticky in nature

2 C_{17} H_{35} C O O N a      S o a p + C a C l_{2} \to + 2 N a C l + (C_{17} H_{35} C O O)_{2} C a      I s o l u a b l e p e r c i p i t a t e

Question 12. Glycerol is added to soap to –

Increase leathering
Prevent rapid drying
Make soap float on the water
Give colour to the soap

Discuss Question

Answer: Option B. -> Prevent rapid drying
:
B
Glycerol is added mainly to shaving soaps to prevent rapid drying.

Question 13. Assertion (A): Aspartame is sweeter than cane sugar but it is not used in normal cooking.
Reason (R): The control of sweetness of food is very difficult while using Aspartame.

Both A and R are true and R is a correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true

Discuss Question

Answer: Option B. -> Both A and R are true but R is not a correct explanation of A
:
B
Aspartame is 100 times sweeter than cane sugar. Aspartameis not stable at normal cooking temperature and that’s why it is not used in normal cooking.

Question 14. Which of the followings is correct about birth control pills?

It contains only estrogen derivatives
It contains only progesterone derivative
It contains both estrogen and progesterone derivatives
It does not contain any of estrogen or progesterone

Discuss Question

Answer: Option C. -> It contains both estrogen and progesterone derivatives
:
C
Birth control pills essentially contain a mixture of synthetic estrogen and progesterone derivatives.

Question 15. Which of the followings artificial sweeteners has the highest sweetness?

Aspartame
Saccharin
Sucralose
Alitame

Discuss Question

Answer: Option D. -> Alitame
:
D

\begin{matrix} Sweetener & Aspartame & Saccharin & Sucralose & Alitame Sweetness value compared to cane sugar & 100 & 550 & 600 & 2000 \end{matrix}

Question 16. Which of the followings is an example of liquid dish washing detergent?

C15H31COOK
CH3− (C6H4)− OSO3Na
[CH3 − N(CH3)3]+Br−
CH3(CH2)16COO(CH2CH2O)nCH2CH2OH

Discuss Question

Answer: Option D. -> CH3(CH2)16COO(CH2CH2O)nCH2CH2OH
:
D
Liquid dishwashing detergents are non-ionic type detergents.
Option (a) is soap.
Option (b) is anionic type detergent.
Option (c) is cationic type detergent.

Question 17. Beverage companies aim to provide zero calorie soft drinks through their products such as Diet Coke or Diet Pepsi. Which of the followings can’t be constituents of these soft drinks –

Aspartame
Sucrose
Sucralose
Alitame

Discuss Question

Answer: Option B. -> Sucrose
:
B
Except Sucrose, all are artificial sweetener and provide negligible calories. Also these sweeteners are multiple times sweeter than cane sugar. So, they are used in very small quantity.

Question 18. Chloramphenicol is:

antiseptic and disinfectant
antibiotic broad spectrum
antifertility drug
antihistaminic

Discuss Question

Answer: Option B. -> antibiotic broad spectrum
:
B
Chloramphenicol, isolated in 1947, is a broad spectrum antibiotic. It is rapidly absorbed from the gastrointestinal tract and hence can be given orally in case of typhoid, dysentery, acute fever, certain form of urinary infections, meningitis and pneumonia.

Question 19. Read the assertion and reason carefully to mark the correct option out of the options given below:
(a)If both assertion and reason are true and the reason is the correct explanation of the assertion.
(b)If both assertion and reason are true but reason is not the correct explanation of the assertion.
(c)If assertion is true but reason is false.
(d)If assertion is false but reason is true.
Assertion : Bithional is added to soap for its beautification and solidification.
Reason : Bithional is a sulpha drug.

Discuss Question

Answer: Option D. -> d
:
D
Bithionol (the compound is also called bithional) is added to soaps to impart antiseptic properties.

Read The Assertion And Reason Carefully To Mark The Correct ...

Question 20. Polyethylene glycols are used in the preparation of which type of detergents?

Cationic detergents
Anionic detergents
Non-ionic detergents
Soaps

Discuss Question

Answer: Option C. -> Non-ionic detergents
:
C
Non-ionic detergents do not contain any ion in their constitution. One such detergent is formed when stearic acid reacts with polyethyleneglycol.