10% solution of ${\rm{N}}{{\rm{a}}_2}{\rm{C}}{{\rm{O}}_3}$

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NEET • CHEMISTRY • CHEMISTRY IN EVERYDAY LIFE

Chemistry in everyday life practice · Mixed difficulty

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Showing 31-60 of 74 questions

31 Easy

31 of 74

Understanding +4 | -1

Which statement is false?

View answer and explanation

Correct option: C

Ampicillin is a natural antibiotic

Option C (Ampicillin is a natural antibiotic) is false because Ampicillin is a semi-synthetic derivative of penicillin, not a natural antibiotic.

32 Easy

32 of 74

Understanding +4 | -1

Which one is not a glyceride?

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Correct option: D

Soap

Option D (Soap) is correct because fats, oils, and phospholipids are glycerides (esters of glycerol), while soap is a salt of a fatty acid.

33 Medium

33 of 74

Remembering +4 | -1

Oils are:

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Correct option: B

Liquid fats

Option B (Liquid fats) is correct because oils are triglycerides that are liquid at room temperature, hence they are liquid fats.

34 Hard

34 of 74

Understanding +4 | -1

The rose odour from an ester is formed by the action of HCOOH on:

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Correct option: C

Geraniol

Option C (Geraniol) is correct because the rose odor from an ester is formed by the action of HCOOH on geraniol.

35 Medium

35 of 74

Remembering +4 | -1

Spermaceti is commonly used in:

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Correct option: D

Cosmetics and soaps

Option D (Cosmetics and soaps) is correct because spermaceti, a wax ester obtained from sperm whales, is commonly used as an emollient and thickening agent in cosmetics and soaps.

36 Easy

36 of 74

Understanding +4 | -1

Aspartame is one of the good artificial sweeteners whose use is limited to cold foods and soft drinks because

View answer and explanation

Correct option: B

It gets dissociated at cooking temperature

Option B (It gets dissociated at cooking temperature) is correct because Aspartame is unstable at high temperatures and breaks down, losing its sweetness.

37 Hard

37 of 74

Remembering +4 | -1

An example of a liquid propellant is:

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Correct option: A

Liquid

{N_2}{O_4} +

kerosene

Option A (Liquid

{N_2}{O_4} +

kerosene) is correct because liquid dinitrogen tetroxide (

N_2O_4

) and kerosene are commonly used as a liquid oxidizer and fuel combination in rocket propulsion.

38 Hard

38 of 74

Understanding +4 | -1

Assertion (A): Non-competitive inhibitors occupy allosteric site so that the substrate cannot attach at active site.

Reason (R): Non-competitive inhibitors change the shape of active site of enzyme after binding at allosteric site.

View answer and explanation

Correct option: A

Both A and R are true and R is the correct explanation of A

Option A is correct because both the assertion and reason are true, and the reason correctly explains why non-competitive inhibitors block substrate attachment.

39 Medium

39 of 74

Understanding +4 | -1

Which of the following structures represents a colourless substance?

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Correct option: C

{C_6}{H_5} - NH - NH - {C_6}{H_5}

Option C (

{C_6}{H_5} - NH - NH - {C_6}{H_5}

) is correct because it represents diphenylhydrazine, which is a colorless substance. The other options contain azo groups which are generally colored.

40 Easy

40 of 74

Remembering +4 | -1

Metal lauryl sulphate acts as:

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Correct option: D

Detergent

Option D (Detergent) is correct because metal lauryl sulfate is a synthetic surfactant used as a detergent due to its amphiphilic nature.

41 Hard

41 of 74

Remembering +4 | -1

Which of the following is pheromone?

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Correct option: B

Disparlure

Option B (Disparlure) is correct because Disparlure is a pheromone used to attract insects, specifically the gypsy moth.

42 Medium

42 of 74

Application +4 | -1

If you spill a chemical toilet cleaning liquid on your hand, your first aid would be

View answer and explanation

Correct option: C

aqueous

NaHC{O_3}

Option C (aqueous

NaHC{O_3}

) is correct because it neutralizes the base in the toilet cleaner without causing further harm.

43 Medium

43 of 74

Application +4 | -1

The pH value of gastric juice in human stomach is about 1.8 and in the small intestine it is about 7.8. The

\;\;\mathrm{p}{\mathrm{K}_a}

value of aspirin is 3.5. Aspirin will be

View answer and explanation

Correct option: C

Ionized in the small intestine and almost unionized in the stomach.

Option C is correct because aspirin, being an acid, will be ionized in the small intestine (pH > pKa) and almost unionized in the stomach (pH < pKa).

44 Medium

44 of 74

Remembering +4 | -1

Commercial detergents contain mainly:

View answer and explanation

Correct option: C

\mathrm{ROS}{\mathrm{O}_3}\mathrm{Na}

Option C (

\mathrm{ROS}{\mathrm{O}_3}\mathrm{Na}

) is correct because commercial detergents often contain alkyl sulfates (

\mathrm{ROS}{\mathrm{O}_3}\mathrm{Na}

) as their main active ingredient.

45 Medium

45 of 74

Remembering +4 | -1

Which of the following is not a tranquilizer?

View answer and explanation

Correct option: D

Ethynylestradiol

Option D (Ethynylestradiol) is correct because ethynylestradiol is a synthetic estrogen used in oral contraceptives, not a tranquilizer.

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46 Easy

46 of 74

Analyzing +4 | -1

Assertion (A): Sulpha drugs work like antibiotics but they are not antibiotics.

Reason (R): Sulpha drugs can kill or prevent the growth of micro organisms like antibiotics.

View answer and explanation

Correct option: B

Both A and R are true and R is not the correct explanation of A

Option B is correct because both the assertion and reason are true, but the reason does not explain why sulfa drugs are not antibiotics.

47 Easy

47 of 74

Remembering +4 | -1

The lye is:

View answer and explanation

Correct option: A

10% solution of NaOH

Option A (10% solution of NaOH) is correct because lye is a common name for sodium hydroxide (NaOH) solution, typically around 10% concentration.

48 Hard

48 of 74

Understanding +4 | -1

S-I: Chemical messenger gives message to the cell without entering the cell.

S-II: Chemical messenger is received at the binding site of receptor proteins.

View answer and explanation

Correct option: A

Both (I) and (II) are ture

Option A is correct because both statements are true: chemical messengers transmit signals without entering the cell and bind to receptor proteins.

49 Medium

49 of 74

Understanding +4 | -1

Which is not characteristic of soap?

View answer and explanation

Correct option: C

They are immiscible with organic solvents

Option C (They are immiscible with organic solvents) is correct because soaps are generally soluble in organic solvents due to the presence of the non-polar hydrocarbon chain.

50 Medium

50 of 74

Understanding +4 | -1

Which of the following statements are correct?
i) Polynuclear hydrocarbons contain two or more benzene rings fused together
ii) Polynuclear hydrocarbons have carcinogenic property
iii) Polynuclear hydrocarbons are formed on incomplete combustion of organic materials like tobacco, coal and petroleum
iv) They are also produced in human body due to various biochemical reaction

View answer and explanation

Correct option: D

(i), (ii) and (iii)

Option D is correct because statements (i), (ii), and (iii) accurately describe polynuclear hydrocarbons: their structure, carcinogenic properties, and formation.

51 Easy

51 of 74

Remembering +4 | -1

Which of the following is bacteriostatic?

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Correct option: B

Erythromycin

Option B (Erythromycin) is correct because it inhibits bacterial growth without necessarily killing the bacteria.

52 Medium

52 of 74

Remembering +4 | -1

Antibiotic inhibiting translation in eukaryotes is

View answer and explanation

Correct option: C

Puromycin

Option C (Puromycin) is correct because it is known to inhibit translation in both prokaryotes and eukaryotes.

53 Easy

53 of 74

Remembering +4 | -1

Fats, on alkaline hydrolysis, gives

View answer and explanation

Correct option: B

Soaps

Option B (Soaps) is correct because fats, upon alkaline hydrolysis (saponification), yield glycerol and the salts of fatty acids, which are soaps.

54 Easy

54 of 74

Remembering +4 | -1

One of the most widely used drug in medicine, iodex is:

View answer and explanation

Correct option: A

Methyl salicylate

Option A (Methyl salicylate) is correct because it is the active ingredient in many topical pain relievers like Iodex.

55 Easy

55 of 74

Remembering +4 | -1

Which of the following may be used as food preservative?

View answer and explanation

Correct option: C

Sodium benzoate

Option C (Sodium benzoate) is correct because it is a common food preservative that inhibits microbial growth.

56 Hard

56 of 74

Remembering +4 | -1

Iproniazid is used as a/an

View answer and explanation

Correct option: B

Tranquilizer

Option B (Tranquilizer) is correct because Iproniazid is a monoamine oxidase inhibitor (MAOI) that was historically used as a tranquilizer and antidepressant.

57 Medium

57 of 74

Understanding +4 | -1

Which of the following statement is in correct ?

View answer and explanation

Correct option: B

Bacteria can degrade the detergents containing highly branched chains

Option B (Bacteria can degrade the detergents containing highly branched chains) is correct because detergents with highly branched chains are not easily biodegradable by bacteria, leading to environmental pollution.

58 Easy

58 of 74

Analyzing +4 | -1

Which set has different class of compounds?

View answer and explanation

Correct option: A

Tranquillizers : equanil, heroin, valium

Option A is correct because heroin is a narcotic analgesic, not a tranquilizer, making it the different class of compound in that set.

59 Medium

59 of 74

Understanding +4 | -1

Indigo shows cis-trans isomerism. Which is the stable form of indigo?

View answer and explanation

Correct option: B

Trans

Option B (Trans) is correct because the trans isomer is more stable due to reduced steric hindrance compared to the cis isomer.

60 Medium

60 of 74

Remembering +4 | -1

The insecticide containing 99%

\gamma

-isomer of benzene hexachloride is known as:

View answer and explanation

Correct option: A

Lindane

Option A (Lindane) is correct because Lindane is the common name for the insecticide containing 99%

\gamma

-isomer of benzene hexachloride.

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