InterviewSolution
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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.
| 751. |
Out of the following the alkene that exhibits optical isomerism isA. 3-Methylpent - 1- eneB. 2-Methylpent -2- eneC. 3- Methylpent -2- eneD. 4-methylpent -1-en |
| Answer» Correct Answer - 1 | |
| 752. |
In which of the following compounds, carbon exhibits a valency of four but oxidation state of -2 ?A. `HCHO`B. `CH_(3)CI`C. `CH_(2)CI_(2)`D. `CHCI_(3)` |
| Answer» Correct Answer - B | |
| 753. |
A 10g mixture of iso-butane and iso-butene requires 20g of `Br_2`(in `CCl_4`) for complete addition. If 10g of the mixture is catalytically hydrogenated and the entire alkane is monobrominated in the presence of light at `127^(@)`C, how much of it would be formed? (Atom weight of bromine=80)A. 24.21gB. 20.0gC. 30.0gD. 12g |
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Answer» Correct Answer - A Let iso-butane be a g and iso-butene b g. Thus a + b = 10g `CH_3-underset((56))underset("iso-butene")underset(CH_3)underset(|)C=CH_2+underset((80xx2))(Br_2)toCH_2-underset(CH_3)underset(|)overset(Br)overset(|)C-CH_3Br` `CH_3-underset("iso-butane")underset(CH_3)underset(|)(CH)-CH_3+Br_2to` No addition reaction Now 160 g of `Br_2` reacts with 56 g of iso-butene `:.` 20g of `Br_2`reacts with `(56xx20)/160=7.25` g of iso-butane Total amount of iso-butane available for 10g mixture `=(7.25+3)=10.25 g` `CH_3-underset((58))underset(CH_3)underset(|) (CH)-CH_3+Br_2tounderset("tert-butyl bromide(137)")(CH_3-underset(CH_3)underset(|)overset(Br)overset(|)C-CH_3)` Now 58g of iso-butane gives 137 fo tert-butyl bromide `:.` 10.25g of iso-butane gives `(137xx10.25)/58=24.21g` of tert-butyl bromide. |
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| 754. |
Structure of 2-methyl 2-halo butane isA. `CH_(3)-CX(CH_(3))C_(2)H_(5)`B. `CH_(3)-CH_(2)-CX(CH_(3))C_(2)H_(5)`C. `CH_(3)CX(CH_(3))CH_(3)`D. `CH_(3)-CHXC_(2)H_(5)` |
| Answer» Correct Answer - A | |
| 755. |
Which of the following acts as a poisonous gas ?A. `COCI_(2)`B. `C CI_(2)F_(2)`C. BenzeneD. `CH_(3) CI` |
| Answer» Correct Answer - 1 | |
| 756. |
Find out X and Y in the following reaction `Xoverset(I_(2)//HgO)to" iodobenzene "overset(2Na)toY`A. toluene and alkyl benzeneB. toluene and diphenylC. benzene and alkyl benzeneD. benzene and diphenyl |
| Answer» Correct Answer - D | |
| 757. |
Diphenyl is prepared from iodobenzene byA. Wurtz reactionB. Fitting reactionC. Kolbes reactionD. Darzen reaction |
| Answer» Correct Answer - B | |
| 758. |
Reduction of chlorobenzene by `LiAlH_(4)` givesA. tolueneB. benzeneC. diphenylD. phenyl |
| Answer» Correct Answer - B | |
| 759. |
Substitution of chlorine takes place readily at higher temperature inA. `CH_(3)-CH=CH_(2)`B. `CH_(2)=CH_(2)`C. `CH-=CH`D. none of the above |
| Answer» Correct Answer - A | |
| 760. |
The reaction is a (an)A. addition reactionB. electrophilic substitution reactionC. nucleophilic substitution reactionD. elimination reaction |
| Answer» Correct Answer - B | |
| 761. |
Chlorobenzene does not give `SN^(1)` reaction, because ofA. chlorine is attached to sp hybridized carbon atom.B. chlorine is attached to `sp^(3)` hybridized carbonC. resonance stabilization of benzene producesD. self ionization of chloro benzene produces phenyl cation, which is not stabilized by resonance. |
| Answer» Correct Answer - D | |
| 762. |
Nitration of chlorobenzene producesA. 1- chloro-2-nitrobenzeneB. 1-chloro-4-nitrobenzeneC. 1-chloro -3-nitrobenzeneD. mixture of a and b |
| Answer» Correct Answer - D | |
| 763. |
Aryl halide undergoes electrophilic substitution reaction slowly as comparred to benzene why ?A. more resonence stabilizationB. less resonence stabilizationC. `-I` effect halogenD. `+I` effect of halogen |
| Answer» Correct Answer - C | |
| 764. |
Which of the following may be classified as an aryl halide ?A. B. C. D. |
| Answer» Correct Answer - 3 | |
| 765. |
Fluorobenzene can be synthesised in the laboratoryA. by heating phenol with HF and KFB. from aniline by diazotisation followed by heating diazonium salt with HFC. by direct fluorination of benzene with fluorine gasD. by reacting bromobenzene with NaF solution. |
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Answer» Correct Answer - B Is the correct answer the reaction is called bal schiemann reaction. |
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| 766. |
Define Enantiomers . |
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Answer» Enantiomers : The stereo isomers related to each other as non-superimposable mirror images are called enantiomers . `to` These have identical physical properties like melting point, boiling point refractive index etc . `to` They differ in rotation of plane polarised light . |
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| 767. |
Which of the following cannot be resolved into enantiomers ?A. B. C. D. |
| Answer» Correct Answer - (2,3) | |
| 768. |
Consider the following pair of compound which of the following statement is correctA. Both are enantiomersB. Both are in threo formC. Both are diastereomersD. Both are in erythro form |
| Answer» Correct Answer - (1,2) | |