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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which is least reactive towards nucleophilic substitution `(S_(N^(2)))`A. `CH_(2)=CH-CH_(2)Cl`B. `(CH_(3))_(3)C Cl`C. D. `CH_(3)CHClCH_(3)` |
| Answer» Correct Answer - C | |
| 2. |
Assertion (A) : The nucleophilic substitution of vinylchloride is difficult as compared to ethyl chloride. Reason (R ) : The vinyl group is electron donating in vinyl chloride.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is trueD. A is false but R is true |
| Answer» Correct Answer - C | |
| 3. |
Assertion (A) : 1, 4-dichlorobenzene has higher melting point than that ethyl chloride. Reason (R ) : 1, 4-Dichlorobenzene is more symmetrical than 1, 2-dichlorobenzene.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is trueD. A is false but R is true |
| Answer» Correct Answer - A | |
| 4. |
A good industrial solvent for oils, fats, paints and varnishes isA. 1,1,2,2-TetrachloroethaneB. 1,1-DichloropropanoneC. 1,3-DichloropropanoneD. 1,2-Dichloroethene |
| Answer» Correct Answer - A | |
| 5. |
Mustard gas is:A. Dichlorodiethyl sulphideB. Dichlorodimethyl sulphideC. Dichlorodiethyl etherD. None of these |
| Answer» Correct Answer - A | |
| 6. |
Which of the following compounds is expected to be optically active ?A. `(CH_(3))_(2)CHCHO`B. `CH_(3)CH_(2)CH_(2)CHO`C. `CH_(3)CH_(2)CHBrCHO`D. `CH_(3)CH_(2)CBr_(2)CHO` |
| Answer» Correct Answer - C | |
| 7. |
Which of the following compounds gives trichloromethane on distilling with bleaching powder ? .A. methanalB. phenolC. ethanolD. methanol |
| Answer» Correct Answer - C | |
| 8. |
Which is better solvent than westronA. TrichloroethaneB. 1,1,1,1-TrichloroetheneC. 1,1,2-TrichloroetheneD. Trichloromethanol |
| Answer» Correct Answer - C | |
| 9. |
The reaction is known asA. Wurtz reactionB. Fitting ReactionC. Wurtz-Fitting reactionD. Freund reaction |
| Answer» Correct Answer - D | |
| 10. |
Out of the following compounds which one will have zero dipole moment ?A. ChloromethaneB. DichloromethaneC. TrichloromethaneD. Tetrachloromethane |
| Answer» Correct Answer - B | |
| 11. |
Which of the following is not true for `S_(N^(1))` reaction ?A. It occurs through a single step concerted mechanismB. It is favoured by polar solventsC. `3^(@)` Alkyl halides generally react through this mechanismD. Concentration of nucleophile does not affect the rate of such reactions |
| Answer» Correct Answer - A | |
| 12. |
Ethyl bromide reacts with lead -sodium alloy to fromA. Tetraethyl leadB. Ethyl sodiumC. EthaneD. Ethene |
| Answer» Correct Answer - A | |
| 13. |
Which of the following factors does not favour `S_(N^(1))` mechanism ?A. Strong nucleophileB. Polar solventC. Low concentration of nucleophileD. `3^(@)` alkyl halide |
| Answer» Correct Answer - D | |
| 14. |
Reaction of methyl bromide with aqueous sodium hydroxide involves ………………….A. racemisationB. `S_(N^(1))` mechanismC. inversion of configurationD. `S_(N^(2))` mechanism |
| Answer» Correct Answer - D | |
| 15. |
Assertion (A) : Methyl chloride can give methane as well as ethane separately. Reason (R ) : Wurtz reaction proceeds through free radical mechanism.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is trueD. A is false but R is true |
| Answer» Correct Answer - B | |
| 16. |
Markownikoff rule is best applicable toA. `C_(2)H_(4)+HCl`B. `C_(3)H_(6)+Br_(2)`C. `C_(3)H_(6)+HBr`D. `C_(3)H_(6)+Cl_(2)` |
| Answer» Correct Answer - C | |
| 17. |
An organic compound which produces a bluish green colored flame on heating in the presence of copper isA. chlorobenzeneB. benzealdehydeC. anilineD. benzoic acid |
| Answer» Correct Answer - A | |
| 18. |
Assertion (A) : Silver nitrite gives nitro alkene when it reacts with an alkyl halide. Reason (R ) : Silver nitrite is an ionic compound.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is trueD. A is false but R is true |
| Answer» Correct Answer - C | |
| 19. |
Assertion (A) : ROH does not react with NaBr. Reaction (R ) : `Br^(-)` is an extremely weak Bronsted base and cannot displace strong base `OH^(-)` .A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is trueD. A is false but R is true |
| Answer» Correct Answer - A | |
| 20. |
Assertion (A) : Chloral is not alkyl halide. Reason (R ) Chloral molecule contains two OH groups linked to same C atom.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is trueD. A is false but R is true |
| Answer» Correct Answer - B | |
| 21. |
Iodoethane reacts with sodium in ether, the product formed isA. PenteneB. PropyneC. ButeneD. Butane |
| Answer» Correct Answer - D | |
| 22. |
Which of the following method is employed to distinguish optical isomers ?A. Chemical testB. PolarimetryC. SpectroscopyD. Boiling/Melting point determination. |
| Answer» Correct Answer - B | |
| 23. |
Assertion (A) : Chloroform is generally stored in brown bottles which are filled to brims. Reason (R ) : Chloroform reacts with glass in the presence of sunlight.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is trueD. A is false but R is true |
| Answer» Correct Answer - C | |
| 24. |
Assertion (A) : 2, 3, 4-Trichloropentane can exhibit optical isomerism. Reason (R ) : 2, 3, 4- Trichloropentane has three chiral C atom in its molecule.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is trueD. A is false but R is true |
| Answer» Correct Answer - C | |
| 25. |
The reagents for the following conversion is/are A. alcoholic KOHB. alcoholic (2OH) followed by `NaNH_(2)`C. aqueous KOH followed by `NaNH_(2)`D. `Zn//CH_(3)COOH` |
| Answer» Correct Answer - B | |
| 26. |
The structure of the major product formed in the following reaction is: A. B. C. D. |
| Answer» Correct Answer - D | |
| 27. |
The empirical formula compound is `CH_(2)` It will beA. alkeneB. areneC. alkaneD. alkyne |
| Answer» Correct Answer - A | |
| 28. |
During `AgNO_(3)` test for detection of halogens. Sodiam extract is boiled with a few drops of conc `HNO_(3)` to decomposeA. NaCNB. `NA_(2)S_(g)`C. both A and BD. None of these |
| Answer» Correct Answer - C | |
| 29. |
IUPAC name of Gammexane isA. HexachlorobenzeneB. Benzene hexachlorideC. 1, 2, 3, 4, 5, 6-HexachlorocyclohexaneD. None of these |
| Answer» Correct Answer - C | |
| 30. |
Assertion (A) : Carbon tetrachloride is used as fire extinguisher. Reason (R ) : Carbon tetrachloride is a non polar substance.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is trueD. A is false but R is true |
| Answer» Correct Answer - B | |
| 31. |
Assertion (A) : Tertiary alkyl halides are more reactive than `1^(@)` alkyl halides towards elimination. Reason (R ) : Positive Inductive effect of alkyl groups weakens carbon-halogen bond in `3^(@)` halides.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is trueD. A is false but R is true |
| Answer» Correct Answer - A | |
| 32. |
(A) 2- Bromobutane on reaction with sodium ethoxide in ethanol gives 1-butene as a major product. (R) 1-Butene is less stable than 2-butene.A. Both A and R are true and R is the correct explanation of AB. Both A and R are true but R is not a correct explanation of AC. A is true but R is trueD. A is false but R is true |
| Answer» Correct Answer - A | |
| 33. |
Fluorobenzene `(C_(6)H_(5)F)` can be synthesized in the laboratory .A. hy heating phenol with HF and KFB. from aniline by diazotise followed by heating the salt with `HBF_(4)`.C. by direct fluorinatron of benzene with `F_(2)` gasD. by reacting bromobenzene with NaF solution |
| Answer» Correct Answer - B | |