Chemistry In Everyday Life(11th And 12th > Chemistry ) Questions and answers for exam Preparation

Statement 1: Dettol is an antibiotic.
Statement 2: Antibiotics are used to kill microorganisms.

Only statement 1 is correct
Only statement 2 is correct
Both statements are correct
Both statements are incorrect

Explanation:-

Answer: Option B. -> Only statement 2 is correct
:
B
Antibiotics are used to kill bacteria and microorganisms. They are usually taken orally or injected.
Antiseptics are used just to inhibit or prevent bacterial growth and not to kill them. They are used by applying on the skin. Dettol is antiseptic.

Question 2.

Which of the following represents soap

$C_{17} H_{35} C O O K$
$C_{17} H_{35} C O O H$
$C_{15} H_{31} C O O H$
$(C_{17} H_{35} C O O)_{2} C a$

Explanation:-

Answer: Option A. ->

C_{17} H_{35} C O O K

:
A

Soaps are sodium or potassium salts of long chain fatty acids.

Question 3.

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

Explanation:-

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 4.

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

Explanation:-

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 5.

Which of the followings artificial sweeteners has the highest sweetness?

Aspartame
Saccharin
Sucralose
Alitame

Explanation:-

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 6.

Which statement is false

Some disinfectants can be used antiseptics at low concentration
Sulphadiazine is a synthetic antibacterial
Ampicillin is a natural antibiotic
Aspirin is analgesic and antipyretic both

Explanation:-

Answer: Option C. -> Ampicillin is a natural antibiotic
:
C

Ampicillin is a synthetic antibiotic.

Question 7.

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

Explanation:-

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. Aspartame is not stable at normal cooking temperature and that’s why it is not used in normal cooking.

Question 8.

The formulation of Dettol contains

Chloroxylenol
Terpineol
Alcohol
All of these

Explanation:-

Answer: Option D. -> All of these
:
D

Dettol (antiseptic) is a mixture of $4.8 %$ chloroxylenol + $9.9 %$ terpineol and absolute alcohol.

Question 9.

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

$C_{15} H_{31} C O O K$
$C H_{3} - (C_{6} H_{4}) - O S O_{3} N a$
$[C H_{3} - N (C H_{3})_{3}]^{+} B r^{-}$
$C H_{3} (C H_{2})_{16} C O O (C H_{2} C H_{2} O)_{n} C H_{2} C H_{2} O H$

Explanation:-

Answer: Option D. ->

C H_{3} (C H_{2})_{16} C O O (C H_{2} C H_{2} O)_{n} C H_{2} C H_{2} O H

:
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 10.

Saponification is –

A process of preparing soap solution by dissolving soap in water
A reaction of ester of fatty acid with aqueous sodium or potassium hydroxide
A process of precipitating soap from colloidal solution of soap and glycerol
An industrial term used in laundry industry for dry cleaning.

Explanation:-

Answer: Option B. -> A reaction of ester of fatty acid with aqueous sodium or potassium hydroxide
:
B

Saponification is a reaction of ester of fatty acid with aqueous sodium or potassium hydroxide.