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NEET • CHEMISTRY • CHEMISTRY IN EVERYDAY LIFE

Chemistry in everyday life practice · Mixed difficulty

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61 Medium

61 of 74

Analyzing +4 | -1

Assertion :-At neutral

\mathrm{pH}

, tyrosine act as an acid

Reason:-

\mathrm{pK}_2

of phenol is more than 7 .

View answer and explanation

Correct option: B

If both assertion & reason true but reason is not a correct explanation of the assertion

Option B is correct because both the assertion and reason are true, but the reason does not explain the assertion. Tyrosine can act as an acid at neutral pH, and the pKa of phenol is indeed greater than 7, but the latter doesn't explain the former.

62 Easy

62 of 74

Understanding +4 | -1

Antiseptic are different from disinfectants as

View answer and explanation

Correct option: D

Antiseptic are used over living tissues while disinfectants cannot be used over living tissues

Option D (Antiseptic are used over living tissues while disinfectants cannot be used over living tissues) is correct because antiseptics are applied to living tissues, while disinfectants are used on inanimate objects.

63 Easy

63 of 74

Remembering +4 | -1

Mixture of chloroxylenol and terpinol acts as

View answer and explanation

Correct option: C

Antiseptic

Option C (Antiseptic) is correct because chloroxylenol and terpinol are ingredients in Dettol, a common antiseptic.

64 Hard

64 of 74

Understanding +4 | -1

Given below are two statements:
Statement I: Aspirin and Paracetamol belong to the class of narcotic analgesics.
Statement II: Morphine and Heroin are non-narcotic analgesics. In the light of the above statements, choose the correct answer from the options given below.

View answer and explanation

Correct option: D

Both Statement I and Statement II are false

Option D is correct because both statements are false: Aspirin and Paracetamol are non-narcotic analgesics, while Morphine and Heroin are narcotic analgesics.

65 Medium

65 of 74

Remembering +4 | -1

The term LABS abbreviates as:

View answer and explanation

Correct option: C

Linear alkyl benzene sulphonate

Option C (Linear alkyl benzene sulphonate) is correct because LABS stands for Linear Alkyl Benzene Sulphonate, a common type of anionic surfactant used in detergents.

66 Medium

66 of 74

Analyzing +4 | -1

An antiseptic Dettol is a mixture of two compounds ‘A’ and ‘B’ where A has

6\pi

electrons and B has

2\pi

electrons. What is ‘B’?

View answer and explanation

Correct option: B

Terpineol

Option B (Terpineol) is correct because terpineol has two pi electrons in its structure.

67 Hard

67 of 74

Remembering +4 | -1

Antidepressant drug among the following is

View answer and explanation

Correct option: A

Phenelzine

Option A (Phenelzine) is correct because Phenelzine is a monoamine oxidase inhibitor (MAOI) used as an antidepressant drug.

68 Easy

68 of 74

Remembering +4 | -1

Sodium dodecyl benzene sulphonate is used as a:

View answer and explanation

Correct option: C

Fertilizer

Option D (Detergent) is correct because sodium dodecyl benzene sulfonate is a synthetic surfactant commonly used as a detergent.

69 Hard

69 of 74

Understanding +4 | -1

S-I: The receptor proteins show selectivity for one chemical messenger over the other.

S-II: Chemical messenger binds to the receptor site and inhibits its natural function.

View answer and explanation

Correct option: C

(I) is true but (II) is false

Option C is correct because Statement I is true (receptor proteins show selectivity), but Statement II is false (chemical messengers typically activate, not inhibit, the receptor).

70 Medium

70 of 74

Remembering +4 | -1

Among the following, the narrow spectrum antibiotic is:

View answer and explanation

Correct option: A

Penicillin G

Option A (Penicillin G) is correct because it is effective against a relatively small range of bacteria compared to broad-spectrum antibiotics.

71 Medium

71 of 74

Understanding +4 | -1

Which is correct about vanillin?

View answer and explanation

Correct option: D

All of the above

Option D (All of the above) is correct because vanillin is a flavoring agent with vanilla flavor, it's structurally related to

o

-hydroxy-

m

-methoxy benzaldehyde, and it's a common food additive.

72 Hard

72 of 74

Remembering +4 | -1

A combination of nitrocellulose and nitroglycerine is a propellant of the type:

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Correct option: C

Double base propellant

Option C (Double base propellant) is correct because a combination of nitrocellulose and nitroglycerine forms a double-base propellant, where both components act as energetic materials.

73 Medium

73 of 74

Understanding +4 | -1

What happens when drying oils are exposed to light and moist air?

View answer and explanation

Correct option: C

Hardening

Option C (Hardening) is correct because drying oils undergo polymerization and oxidation when exposed to light and moist air, leading to hardening.

74 Hard

74 of 74

Remembering +4 | -1

Alum is used by dyers for cloth

View answer and explanation

Correct option: D

as mordant

Option D (as mordant) is correct because alum acts as a mordant in dyeing, helping the dye adhere to the cloth fibers.

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Chemistry in everyday life practice · Mixed difficulty

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