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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 601. |
Which of the following is not correctly matched with its uses?A. Methanol: As a solvent for paints, varnishes etcB. Ethanol : For denaturing spirit, in manufacture of formaldehydeC. Ethers : To provide inert medium for chemical reactions, as anaesthetic.D. All are correctly matched |
| Answer» Correct Answer - B | |
| 602. |
Which of the following products are not correctly matched in the given raction ?A. `C_2H_2OCH_3+ HBr overset(373 k )rarrC_2H_5OH+CH_3Br`B. `C_2H_5OC_2H_5 + @HI rarr C_2H_5OH+ CH_3 Br `C. `C_2H_5OC_2H_5 +HCl overset("Cold")rarr [(C_2H_5)_2O^+H]Cl^-`D. `(CH_3)_3COC_2H_5 overset(HI)rarr (CH_3)_3CI+C_2H_5OH` |
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Answer» Correct Answer - B `underset((excess))(C_(2)H_(5)-O-C_(2)H_(5)+2HIrarr2C_(2)H_(5)I+H_(2)O)` |
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| 603. |
Williamsons synthesis is used to prepareA. Diethyl etherB. PVCC. BakeliteD. Ethyl alcohol |
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Answer» Correct Answer - A |
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| 604. |
Which of the following compounds is prduced when this reaction takes place ? `H_(3)C-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-O-CH_(3)overset(HI)underset(coid)rarr`A. `H_(3)C-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-OH`B. `H-overset(H)overset(|)underset(H)underset(|)C-OH`C. Both of theseD. None of these |
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Answer» Correct Answer - B |
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| 605. |
Fermentationis an`//`a `:`A. endothermic reactionB. exothermic reactionC. polymerisation reactionD. condensation reaction |
| Answer» Correct Answer - B | |
| 606. |
Glucose and fructose are converted into `C_(2)H_(5)OH` in presence of `:`A. invertaseB. diastaseC. zymaseD. lipids |
| Answer» Correct Answer - C | |
| 607. |
Which of the following is most suitable reagent to distinguish ether from alcohol ?A. Na metalB. HIC. HBrD. All of these |
| Answer» Correct Answer - A | |
| 608. |
Which of the following is used in the preparation of RMgX?A. Dimethyl etherB. Diethyl etherC. Ethyl methyl etherD. Ethanol |
| Answer» Correct Answer - B | |
| 609. |
The compound which has the lowest boiling points isA. `H_(2)O`B. `C_(2)H_(5)OH`C. `underset(OH)underset(|)CH_(2)-underset(OH)underset(|)CH_(2)`D. `CH_(3)OCH_(3)` |
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Answer» Correct Answer - D |
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| 610. |
Following one is formed when a diethyl either is expoed to air for longer periodA. Ethyl alcoholB. AcetaldehydeC. EthyleneD. Peroxide of diethy ether |
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Answer» Correct Answer - D |
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| 611. |
Ethers are obtained byA. Reaction of alkyl halide with dry ZnOB. Reaction of alkyl halide with moist ZnOC. Reaction of alkyl halide with dry `Ag_(2)O`D. Reaction of alkyl halide with moist `Ag_(2)O` |
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Answer» Correct Answer - C |
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| 612. |
The compound which is not isomeric with diethyl ether is :A. ButanoneB. Methyl propyl etherC. 2-methyl propane -2-olD. Butanol -1 |
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Answer» Correct Answer - A |
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| 613. |
The IUPAC name of `C_(2)H_(5)O C_(2)H_(5)`A. Diethyl etherB. Ethoxy ethaneC. Ethoxy propaneD. Dimethyl ether |
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Answer» Correct Answer - B |
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| 614. |
The linkage is present in :(a) proteins (b) ketones (c) ethers (d) aldehydes |
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Answer» Option : (c) ethers |
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| 615. |
Aldehydes are first oxidation products of : (a) primary alcohols (b) secondary alcohols (c) tertiary alcohols (d) carboxylic acids |
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Answer» Option : (a) primary alcohols |
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| 616. |
Which of the following is a trihydric alcohol? (a) n-propyl alcohol (b) Glycerol (c) Glycol (d) Glycine |
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Answer» Option : (b) Glycerol |
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| 617. |
Which of the following compounds contain hydrogen bonds?(a) Ethane (b) Ethanol (c) Methoxymethane (d) Ethylene |
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Answer» Option : (b) Ethanol |
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| 618. |
Arrange O – H, C – H and N – H bonds in increasing order of their bond polarity. |
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Answer» Increasing order of polarity : C – H, N – H, O – H |
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| 619. |
Which of the following is the most acidic alcohol ?A. `CH_(3)OH`B. `CF_(3)=CH_(2)-OH`C. D. |
| Answer» Correct Answer - D | |
| 620. |
Which of the following is the most acidic alcohol ?A. B. C. D. |
| Answer» Correct Answer - D | |
| 621. |
In the reaction, the compound (A) is `:`A. B. C. D. no reaction |
| Answer» Correct Answer - B | |
| 622. |
Which `A` gives red colour in the reaction A` overset ((i) HNO_2)underset((ii) NaOH) (rarr)` red colur ?`A. `CH_(3)-CH_(2)-NO_(2)`B. `(CH_(3))_(2)CHNO_(2)`C. `(CH_(3))_(3)C-NO_(2)`D. |
| Answer» Correct Answer - A | |
| 623. |
Which of the following is most acidic ?A. Benzyl alcoholB. CyclohexanolC. PhenolD. m-chlorophenol |
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Answer» Correct Answer - D Alpha carbon of benzyl and cyclohexanl is `sp^(3)` hybridised while is phenol and m-chlorophenol, it is `sp^(2)` hybridised. In m-chlorophenol electron withdrawing group `(-Cl)` is present at meta position. Presence of electron withdrawing group increases the acidic strength. So, m-chlorophenol is most acidic among all the given compounds. The correct option is (d). |
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| 624. |
Mark the correct order of decreasing acid strength of the following compounds. A. `V gt IV gt II gt I gt III`B. `II gt IV gt I gt III gt V`C. `IV gt V gt III gt II gt I`D. `V gt IV gt III gt II gt I` |
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Answer» Correct Answer - B Presence of electron withdrawing group on phenols, increases its acidic stength. So, both compounds i.e., p-nitrophenol (II) and m-nitrophenol (IV) are stronger acid than (I). If this `-NO_(2)` group is present at p-position, then it exerts both -I and -R effect but if it is present at meta position, then it exerts only -I effect. Therefore, p-nitrophenol is much stronger acid than m-nitrophenol. On the other hand, presence of electron releasing group on phenol, decreases its acidic strength. If `-OCH_(3)` group is present at meta position, it will not exert +R effect but exert -I effect. But, if it is present at para position, then it will exert +R effect. Therefore, m-methoxy phenol is more acidic than p-methoxy phenol. Hence, the correct option is (b). |
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| 625. |
The major organic product in the reaction `CH_(3)-O-CH(CH_(3))_(2)+HIrarr` product isA. `CH_(3)OH+(CH_(3))_(2)CHI`B. `CH_(3)I+(CH_(3))_(2)CHOH`C. `ICH_(2)OCH(CH_(3))_(2)`D. `CH_(3)Ounderset(I)underset(|)(C)(CH_(3))_(2)` |
| Answer» Correct Answer - B | |
| 626. |
Increasing `pK_(a)` values of o-, m- and p- cresols isA. `o lt p lt m`B. `m lt p=o`C. `m lt o lt p`D. `p lt o lt m` |
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Answer» Correct Answer - B |
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| 627. |
Which of the following reagents can be used to separate a mixture of phenol and carboxylic acid?A. `NaOH`B. `Na_(2)CO_(3)`C. lime waterD. `NaHCO_(3)` |
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Answer» Correct Answer - D Phenol is less acidic than carbonic acid whereas carboxylic acids are more acidic. Hence, phenols are insoluble in a solution of `NaHCO_(3)` but carbonxylic acids dissolve in `NaHCO_(3)` solution. |
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| 628. |
The major product `[P]` isA. B. C. D. |
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Answer» Correct Answer - B Due to lesser steric hindrane of `-OH` than of `-NO_(2)`. |
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| 629. |
Which is correct about the change given below? A. The two compounds exhibit keto-enol isomerismB. Former is enol form, latter is keto fromC. Former is more stable than latter due to more resonanceD. All are correct |
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Answer» Correct Answer - D Factual |
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| 630. |
Which one of the following compounds dissolves in hot dilute sulphuric acid but does not react with sodium metal?(a) Ethyl bromide (b) Acetic acid (c) Ethyl alcohol (d) Diethyl ether |
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Answer» Option : (d) Diethyl ether |
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| 631. |
Which of the following chemicals are used for the denaturation of ethyl alcohol ?A. `CH_(3)OH`B. PyridineC. anhydrous `CaCl_(2)`D. Naphtha |
| Answer» Correct Answer - A,B | |
| 632. |
Which one of the following is a secondary alcohol?A. 2-Methyl propan -1--olB. 2-Methyl propan -2-olC. Butan-2-olD. Butan-1-ol |
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Answer» Correct Answer - C |
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| 633. |
Which one of following is a secondary alcoholA. 2-Methyl propan-2-olB. Propan-1-olC. Butun-1-olD. Pentan-2-ol |
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Answer» Correct Answer - D |
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| 634. |
Which of the following pairs of the compounds can be used as starting materials in the synthesis of 2-Pheny pentan-2-ol?A. `CH_(3) (CH_(2))_(3) Br` and `PhCOOH`B. `(CH_(3))_(2) CHCH_(2) Br` and `PhCOCH_(3)`C. `PhBr` and `CH_(3)CH_(2)CH_(2)COCH_(3)`D. `PhBr` and `(CH_(3))_(2) CHCH_(2) COCH_(3)` |
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Answer» Correct Answer - C |
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| 635. |
3-methyl-2-butanol on treatment with HCl gives (major product)A. 2-chloro-2-methyl butaneB. 2-chloro-3-methyl butaneC. 2, 2-dimethyl pentaneD. None of the above |
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Answer» Correct Answer - A `{:(" "CH_(3)" "CH_(3)),(" | |"),(CH_(3)-CH-CH-CH_(3)+HClrarrCH_(3)-CH-CH_(2)-CH_(3)+H_(2)O),(" | |"),(" "OH" " underset("2-chloro-2-methyl butane")(Cl)):}` |
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| 636. |
Phenol react with `PCl_(5)` to give mainlyA. p-chlorophenolB. chlorobenzeneC. o and p-chlorophenolD. triphenyl phosphate |
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Answer» Correct Answer - D `2C_(6)H_(5)OH+PCl_(5) underset(-3HCl)overset("Nucleophilic attrack")(rarr)(C_(6)H_(5)O)_(3)PCl_(3)underset(-2HCl)overset(H_(2)O)(rarr)underset("Triphenyl phosphate")((C_(6)H_(5)O)_(3)PO)` |
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| 637. |
The main product obtained from phenol with `PCl_(5)` isA. BHCB. hexachlorobenzeneC. chlorobenzeneD. triphenyl phosphate |
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Answer» Correct Answer - D `C_(6)H_(5)OH+PCl_(5)rarr underset("Chlorobenzene")(C_(6)H_(5)Cl)+POCl_(3)+HCl` `3C_(6)H_(5)OH+POCl_(3) rarr underset("Triphenyl phosphate")(C_(6)H_(5)PO_(4))+3HCl` |
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| 638. |
4-bromophenol is mainly formed, when phenol is reacted with,A. `Br_2`/waterB. `Br_2`/inert solventC. HBr/waterD. HBr/inert solvent |
| Answer» Correct Answer - B | |
| 639. |
Which order is correct about acidity?A. `CH_(3)COOH gt C_(6)H_(5)COOH gt C_(6)H_(5)OH`B. `C_(6)H_(5)COOH gt CH_(3)COOH gt C_(6)H_(5)`C. `C_(6)H_(5)OH gt C_(6)H_(5)COOH gt CH_(3)COOH`D. `C_(6)H_(5)OH gt CH_(3)COOH gt C_(6)H_(5)COOH` |
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Answer» Correct Answer - B |
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| 640. |
The most acidic compound among the following isA. phenolB. ethanolC. 3, 5-dinitrophenolD. 4, 4-methoxy phenol |
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Answer» Correct Answer - C |
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| 641. |
Which of the following pairs of reagents will not form etherA. `C_(2)H_(5)Br+C_(2)H_(5)Ona`B. `C_(2)H_(5)Br+CH_(3)Ona`C. `CH_(3)Br+C_(2)H_(5)Ona`D. `C_(2)H_(5)Br+HCOONa` |
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Answer» Correct Answer - D |
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| 642. |
Which one of the following compounds would undergo nitration with greatest easeA. benzeneB. phenolC. nitrobenzeneD. benzoic acid |
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Answer» Correct Answer - B |
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| 643. |
Which one of following pairs of compounds are functional isomers of each otherA. `CH_(3)CH_(2)CH_(2)OH, CH_(3)CHOHCH_(3)`B. `CH_(3)CH_(2)CH_(2)OH, (CH_(3))_(2) CHCH_(2)OH`C. `CH_(3)CH_(2)CH_(2)OH, CH_(3)CH_(2)CH_(2)Cl`D. `CH_(3)CH_(2)CH_(2)OH, CH_(3)OCH_(2)CH_(3)` |
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Answer» Correct Answer - D |
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| 644. |
Prmary alcoholic group isA. `-CH_(2)OH`B. `-underset(|)overset(|)(C)-`C. `gt CHOH`D. `gt C = O` |
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Answer» Correct Answer - A |
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| 645. |
Phenol on distilling with zinc dust givesA. benzeneB. diphenyl etherC. diphenolD. zinc phenoxide |
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Answer» Correct Answer - A |
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| 646. |
In the following compounds, the order of acidity is:A. `I gt IV gt III gt II`B. `II gt IV gt I gt II`C. `II gt I gt III gt IV`D. `IV gt III gt I gt II` |
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Answer» Correct Answer - D |
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| 647. |
Salicylic acid is produced when phenol in alcoholic KOH is treated withA. `CH_(3)Cl`B. `CHCl_(3)`C. `CH_(2)Cl_(2)`D. `C Cl_(4)` |
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Answer» Correct Answer - D |
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| 648. |
An alkene `CH_(3)CH = CH_(2)` is treated with `B_(2)H_(6)` in presence of `H_(2)O_(2)` . The final product formed isA. `CH_(3)CH_(2)CHO`B. `CH_(3)CH(OH)CH_(3)`C. `CH_(3)CH_(2)CH_(2) OH`D. `(CH_(3)CH_(2)CH_(2))_(3)B` |
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Answer» Correct Answer - C `{:(CH_3=CH=CH_2+(CH_3)_2rarrCH_3CH_2CH_2BH_2),(" "darrCH_2CH=CH_2),(" "(CH_3CH_2CH_2)_3"B"overset(CH_3CH=CH_2)larr(CH_3CH_2)_2BH),(" "H_2Odarr3H_2O_2//OH^_),(" "3CH_3CH_2CH_2OH+B(OH)_3):}` |
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| 649. |
The hydrogen bonding ability of `1^@`, `2^@` and `3^@` alcohols is of the orderA. `3^@ gt 2^@ gt 1^@`B. `1^@ gt 2^@ gt 3^@`C. `3^@ gt 1^@ gt 2^@`D. `1^@ gt 3^@ gt 2^@` |
| Answer» Correct Answer - B | |
| 650. |
Ethers on hydrolysis yieldA. ketoneB. acidC. alcoholD. aldehyde |
| Answer» Correct Answer - C | |