Chemistry Objective Questions and Answers: Chemistry In Everyday Life
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Multiple Choice Questions
(a) Congo red
(b) aniline yellow
(c) alizarin
(d) indigo
Show Answer & Explanation
Answer: (b) aniline yellow
Explanation:
1. Aniline yellow has a basic amino group and is used as the hydrochloride.
Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.
(a) vat dyes
(b) disperse dyes
(c) triphenylmethane dyes
(d) azo dyes
Show Answer & Explanation
Answer: (a) vat dyes
Explanation:
1. Vat dyes are applied as the soluble leuco base and re-oxidised on the fibre.
Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.
(a) kills the antibodies
(b) acts on a specific antigen
(c) acts on different antigens
(d) acts on both the antigens and antibodies
Show Answer & Explanation
Answer: (c) acts on different antigens
Explanation:
1. A broad-spectrum antibiotic is effective against many types of bacteria.
Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.
(a) A. Fleming
(b) Tence and Salke
(c) S.A. Waksman
(d) Lewis Pasteur
Show Answer & Explanation
Answer: (a) A. Fleming
Explanation:
1. Alexander Fleming noticed it from Penicillium notatum mould in 1929.
Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.
(a) uretic
(b) monouretic
(c) diuretic
(d) triuretic
Show Answer & Explanation
Answer: (c) diuretic
Explanation:
1. Diuretics increase urine output.
Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.
(a) DNA
(b) LSD
(c) DDT
(d) TNT
Show Answer & Explanation
Answer: (b) LSD
Explanation:
1. LSD is a hallucinogenic psychedelic drug.
Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.
(a) an anaesthetic
(b) a sedative
(c) an antiseptic
(d) none of these
Show Answer & Explanation
Answer: (b) a sedative
Explanation:
1. Barbiturates are hypnotics and sedatives.
Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.
(a) an antiseptic
(b) aspirin
(c) an antibiotic
(d) a mordant dye
Show Answer & Explanation
Answer: (b) aspirin
Explanation:
1. Aspirin is 2-acetoxybenzoic acid.
Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.
(a) 4-chloro-3,5-dimethylphenol
(b) 3-chloro-4,5-dimethylphenol
(c) 4-chloro-2,5-dimethylphenol
(d) 5-chloro-3,4-dimethylphenol
Show Answer & Explanation
Answer: (a) 4-chloro-3,5-dimethylphenol
Explanation:
1. Chloroxylenol (Dettol) is para-chloro-meta-xylenol.
Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.
(a) bakelite
(b) TNT
(c) BHC
(d) aspirin
Show Answer & Explanation
Answer: (c) BHC
Explanation:
1. Benzene hexachloride is a chlorinated insecticide.
Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.
(a) sulphaguanidine
(b) paludrin
(c) analgin
(d) iodex
Show Answer & Explanation
Answer: (c) analgin
Explanation:
1. Analgin is a non-narcotic analgesic.
Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.
(a) an antibiotic
(b) an antipyretic
(c) a sedative
(d) a psychedelic
Show Answer & Explanation
Answer: (b) an antipyretic
Explanation:
1. It lowers fever and also relieves pain.
Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.
(a) sulphadiazine
(b) papaverine
(c) equanil
(d) mescaline
Show Answer & Explanation
Answer: (c) equanil
Explanation:
1. Equanil (meprobamate) is a mild tranquilliser.
Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.
(a) luminal
(b) salol
(c) catechol
(d) chemisol
Show Answer & Explanation
Answer: (a) luminal
Explanation:
1. Luminal (phenobarbitone) induces sleep.
Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.
(a) quinine
(b) paracetamol
(c) luminal
(d) piperazine
Show Answer & Explanation
Answer: (b) paracetamol
Explanation:
1. Paracetamol lowers fever.
Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.
(a) luminal
(b) tofranil
(c) mescaline
(d) sulphadiazine
Show Answer & Explanation
Answer: (b) tofranil
Explanation:
1. Tofranil (imipramine) is an antidepressant.
Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.
(a) tuberculosis
(b) malaria
(c) typhoid
(d) cholera
Show Answer & Explanation
Answer: (a) tuberculosis
Explanation:
1. Streptomycin was the first drug active against the tubercle bacillus.
Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.
(a) iodoform
(b) Dettol
(c) gammexane
(d) gentian violet
Show Answer & Explanation
Answer: (c) gammexane
Explanation:
1. Gammexane (BHC or lindane) is an insecticide.
Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.
(a) chlorine
(b) sulphur dioxide
(c) potassium permanganate
(d) DDT
Show Answer & Explanation
Answer: (a) chlorine
Explanation:
1. Chlorine kills the bacteria at about 0.2 to 0.4 ppm.
Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.
(a) phenol
(b) benzoic acid
(c) salicylic acid
(d) benzaldehyde
Show Answer & Explanation
Answer: (c) salicylic acid
Explanation:
1. Acetylation of the phenolic -OH of salicylic acid gives aspirin.
Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.
(a) quinine
(b) aspirin
(c) analgin
(d) equanil
Show Answer & Explanation
Answer: (a) quinine
Explanation:
1. Quinine, from cinchona bark, is an antimalarial.
Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.
(a) methedrine
(b) calmpose
(c) LSD
(d) seconal
Show Answer & Explanation
Answer: (c) LSD
Explanation:
1. LSD causes hallucinations.
Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.
(a) cocaine
(b) morphine
(c) caffeine
(d) nicotine
Show Answer & Explanation
Answer: (b) morphine
Explanation:
1. Heroin is diacetylmorphine.
Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.
(a) chloroxylenol
(b) terpineol
(c) alcohol
(d) all of these
Show Answer & Explanation
Answer: (d) all of these
Explanation:
1. Dettol is chloroxylenol and terpineol in alcohol.
Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.
(a) a tonic
(b) a virus
(c) a carbohydrate
(d) an ore of iron
Show Answer & Explanation
Answer: (b) a virus
Explanation:
1. Cells infected with a virus produce interferon, a protein which makes neighbouring cells resistant.
Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.
(a) bacterial disease
(b) viral disease
(c) venereal disease
(d) protozoan disease
Show Answer & Explanation
Answer: (b) viral disease
Explanation:
1. Measles is caused by a virus.
Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.
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FAQs
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