MCQOPTIONS
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MCQOPTIONS
This section includes 39 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A double bond consists of |
| A. | Two sigma bonds |
| B. | Two Pi bonds |
| C. | One sigma and one Pi bonds |
| D. | One sigma and two Pi bonds |
| Answer» D. One sigma and two Pi bonds | |
| 2. |
Main source of organic compounds is |
| A. | Animal |
| B. | Fossil |
| C. | Coal |
| D. | Plants |
| Answer» B. Fossil | |
| 3. |
Octane number can be improved by |
| A. | Isomerization |
| B. | Adding (C2H5)4 Pb |
| C. | Adding (CH3)4 Pb |
| D. | All |
| Answer» E. | |
| 4. |
Hydro carbons which burn with smoky flame are called |
| A. | Aliphatic |
| B. | Alicyclic |
| C. | Aromatic |
| D. | Aldehyde |
| Answer» D. Aldehyde | |
| 5. |
Octane number 2 2 4-trimethyl pentane is |
| A. | 100 |
| B. | 90 |
| C. | 80 |
| D. | 70 |
| Answer» B. 90 | |
| 6. |
Propene can exhibit |
| A. | Cis-trans isomerism |
| B. | Geometric isomerism |
| C. | Both a & b |
| D. | None of the above |
| Answer» E. | |
| 7. |
Geometric isomerism is usually found in |
| A. | Alkanes |
| B. | Alkenes |
| C. | Alkynes |
| D. | Esters |
| Answer» C. Alkynes | |
| 8. |
Compounds having same molecular formula but differ in structural formula are called |
| A. | Polymer |
| B. | Monomer |
| C. | Isomer |
| D. | Allotropes |
| Answer» D. Allotropes | |
| 9. |
Rate of reactions of most organic compounds are |
| A. | Very slow |
| B. | Very fast |
| C. | Slow |
| D. | No regular character present |
| Answer» D. No regular character present | |
| 10. |
Organic compounds are soluble in |
| A. | Polar solvent |
| B. | Non-polar solvent |
| C. | Alkalies |
| D. | Water |
| Answer» C. Alkalies | |
| 11. |
Coal is produced after a long time decay of |
| A. | Animals |
| B. | Fossils |
| C. | Wood |
| D. | All of the above |
| Answer» D. All of the above | |
| 12. |
Methane is used in power generation in chemical industries being a |
| A. | Natural gas |
| B. | Good caloric value |
| C. | Cheaper |
| D. | All |
| Answer» D. All | |
| 13. |
Crude oil is blackish coloured liquid produced after the decay of organic matter present between |
| A. | Earth layer |
| B. | Mountains |
| C. | Sedimentary rocks |
| D. | Rocks |
| Answer» D. Rocks | |
| 14. |
The precess in which larger molecule with higher molecular weight breaks down into smaller moleucles with lower molecular weight |
| A. | Polymerization |
| B. | Pyrolysis |
| C. | Isomerism |
| D. | No such process occurs |
| Answer» C. Isomerism | |
| 15. |
At low temperature and pressure cracking can be done in presence of catalyst |
| A. | Al2O3 |
| B. | Fe2O3 |
| C. | Al2O3 and SiO2 |
| D. | Fe2O3 and SiO2 |
| Answer» D. Fe2O3 and SiO2 | |
| 16. |
The metallic sound produced by engine due to the pre-ignition of fuel is called |
| A. | Knocking |
| B. | Reforming |
| C. | Cracking |
| D. | A and c |
| Answer» B. Reforming | |
| 17. |
Which one of the following compounds shows intense knocking? |
| A. | N-pentane |
| B. | Iso-heptane |
| C. | Iso-octane |
| D. | N-heptane |
| Answer» E. | |
| 18. |
Which of the following can be used as anti-knocking agent. |
| A. | PbCl2 |
| B. | (C2H5)4 Pb |
| C. | (C2H5)2 Pb |
| D. | All of the above |
| Answer» C. (C2H5)2 Pb | |
| 19. |
Ether functional group can be represented as |
| A. | ?OH |
| B. | R-CO-R |
| C. | R-O-R |
| D. | R-COOH |
| Answer» D. R-COOH | |
| 20. |
Isomerism which is present only in alkene is |
| A. | Structural isomerism |
| B. | Metamerism |
| C. | Cis-trans isomerism |
| D. | Both b and c |
| Answer» D. Both b and c | |
| 21. |
A single atom or group of atoms which gives characteristic properties to a compound is called |
| A. | Radical |
| B. | Hydrocarbon |
| C. | Functional group |
| D. | Ion |
| Answer» D. Ion | |
| 22. |
Compound containing benzene ring in their structure are |
| A. | Aliphatic |
| B. | Aromatic |
| C. | Carboxylic acid |
| D. | Carbohydrates |
| Answer» C. Carboxylic acid | |
| 23. |
Pentane and 2-methyl butance have the same |
| A. | Boiling point |
| B. | Melting point |
| C. | Percentage composition |
| D. | Structural formula |
| Answer» D. Structural formula | |
| 24. |
Organic compounds that are essentially nonpolar and exhibit weak intermolecular forces have |
| A. | Low melting points |
| B. | Low vapour pressure |
| C. | High boiling points |
| D. | High electrical conductivity |
| Answer» B. Low vapour pressure | |
| 25. |
The first organic compound was synthesized in laboratory by |
| A. | Wohler |
| B. | Kolbe |
| C. | Berzilius |
| D. | Berthelot |
| Answer» B. Kolbe | |
| 26. |
According to vital force theory |
| A. | Oorganic compounds can be synthesized from inorganic compounds |
| B. | Organic compounds cannot be synthesized from inorganic compounds |
| C. | Organic compounds can be synthesized by animals |
| D. | Organic compounds can be synthesized by plants |
| Answer» C. Organic compounds can be synthesized by animals | |
| 27. |
First organic compound synthesized in laboratory was |
| A. | Tartaric acid |
| B. | Ethyl alcohol |
| C. | Methanol |
| D. | Urea |
| Answer» E. | |
| 28. |
The property of carbon chain formation is called |
| A. | Catenation |
| B. | Hybridization |
| C. | Polymerization |
| D. | Solvation |
| Answer» B. Hybridization | |
| 29. |
Chemical properties of first member of homologous series with respect to other members are |
| A. | Same |
| B. | Different |
| C. | Depends upon number of C atoms |
| D. | Depends upon number of H atoms |
| Answer» B. Different | |
| 30. |
The organic compounds having very high molecular weight are called |
| A. | Carboxylic acids |
| B. | Ketones |
| C. | Aldehydes |
| D. | Polymers |
| Answer» E. | |
| 31. |
Which of the following is an amide |
| A. | R-NH2 |
| B. | RCONH2 |
| C. | R - NH - R |
| D. | C6H5NH2 |
| Answer» C. R - NH - R | |
| 32. |
In sp3 hybridization the expected geometry of molecules will be |
| A. | Square planar |
| B. | Trigonal pyramidal |
| C. | Tetrahedral |
| D. | Linear |
| Answer» D. Linear | |
| 33. |
Only sigma bonds are present in |
| A. | Propene |
| B. | Butanoic acid |
| C. | Butanal |
| D. | Ethoxy ethane |
| Answer» E. | |
| 34. |
The structure of ethyne is |
| A. | Angular |
| B. | Trigonal |
| C. | Linear |
| D. | Trigonal planar |
| Answer» D. Trigonal planar | |
| 35. |
In cyano group the carbon atom shows which kind of hybridization |
| A. | Sp2 |
| B. | Sp |
| C. | Sp3 |
| D. | None of the above |
| Answer» C. Sp3 | |
| 36. |
the fractional distillation of petroleum produces gasoline up to |
| A. | 10% |
| B. | 15% |
| C. | 20% |
| D. | 30% |
| Answer» D. 30% | |
| 37. |
The general formula of cycloalkene is |
| A. | CnH2n |
| B. | CnH2n+2 |
| C. | CnH2n-1 |
| D. | CnH2n-2 |
| Answer» E. | |
| 38. |
Which is not heterocyclic compound |
| A. | Furan |
| B. | Thiophene |
| C. | Aniline |
| D. | Pyridine |
| Answer» D. Pyridine | |
| 39. |
C5H12 has the number of isomers |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» D. Four | |