MCQOPTIONS
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MCQOPTIONS
This section includes 1184 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following statements is incorrect about fluorine_______________? |
| A. | fluorine is restricted to -1 oxidation state |
| B. | fluorine follows octet rule and as well as extended octet rule |
| C. | fluorine has lowest dissociation energy among the halogens |
| D. | both B and C |
| Answer» E. | |
| 2. |
Which of the following statements is incorrect about halogens ? |
| A. | All are non-metals |
| B. | All the halogens have electronic conviguration ns2p5 |
| C. | They have high electron attinity and ionization energy |
| D. | All the halogens react with noble gases to form their halides |
| Answer» E. | |
| 3. |
Which of the following statements is true about plasma________________? |
| A. | It may be the first state of matter |
| B. | It is not a phase transition |
| C. | It is a conductor of electricity |
| D. | All of the above |
| Answer» E. | |
| 4. |
Which of the following statements is wrong about isotopes ? |
| A. | they possess different mass number |
| B. | they possess different physical properties |
| C. | they possess same chemical properties |
| D. | they possess different position in the periodic table |
| Answer» E. | |
| 5. |
Which of the following substance do not show continuous solubility curve ? |
| A. | KCIO4 |
| B. | Na2SO4. 10H2O |
| C. | K2Cr2O7 |
| D. | PbCl2 |
| Answer» C. K2Cr2O7 | |
| 6. |
Which of the following substances does not give iodoform test ? |
| A. | acetaldehyde |
| B. | ethyl alcohol |
| C. | methyl alcohol |
| D. | acetone |
| Answer» D. acetone | |
| 7. |
Which of the following sulphates is not soluble in water ? |
| A. | Sodium sulphate |
| B. | Potassium sulphate |
| C. | Zinc sulphate |
| D. | Barium sulphate |
| Answer» E. | |
| 8. |
Which of the following technique is simple and efficient to purify a substance____________________? |
| A. | Filtration |
| B. | Sublimation |
| C. | Crystallization |
| D. | Solvent extraction |
| Answer» E. | |
| 9. |
Which of the following technique is used for the separation of insoluble particles from liquids ? |
| A. | Filtration |
| B. | Crystallization |
| C. | Solvent extraction |
| D. | Chromatography |
| Answer» B. Crystallization | |
| 10. |
Which of the following terms is not used for ionic compound ? |
| A. | formula unit |
| B. | empirical formula |
| C. | molecular formula |
| D. | formula mass |
| Answer» D. formula mass | |
| 11. |
Which of the following terms is used for the mass of chlorine 35.5 ? |
| A. | relative atomic mass |
| B. | mass number |
| C. | atomic weight |
| D. | relative isotopic mass |
| Answer» B. mass number | |
| 12. |
Which of the following theories is superior to others__________________? |
| A. | VSEPR |
| B. | VBT |
| C. | MOT |
| D. | none of the above |
| Answer» D. none of the above | |
| 13. |
Which of the following type of reaction is 3rd order reaction_________________? |
| A. | 2N2O5 = 2N2O4 + O3 |
| B. | NO + O3 ? NO2 + O2 |
| C. | 2FeCl3 + 6KI ? 2FeI2 + 6KCl + I2 |
| D. | None of these |
| Answer» D. None of these | |
| 14. |
Which of the following unit of concentration is independent of temperature ? |
| A. | Molarity |
| B. | Molality |
| C. | Mole fraction |
| D. | all |
| Answer» C. Mole fraction | |
| 15. |
Which of the following way in used for classification of chromatography ? |
| A. | Shape |
| B. | Phase |
| C. | Mechanism |
| D. | All |
| Answer» E. | |
| 16. |
Which of the following will be acidic_____________? |
| A. | Which of the following will be acidic_____________? |
| B. | 1-butyne |
| C. | ethyne |
| D. | all of the above |
| Answer» E. | |
| 17. |
Which of the following will decompose to produce litharge_________________? |
| A. | Pb2O |
| B. | Pb3O4 |
| C. | PbO2 |
| D. | All of the above |
| Answer» C. PbO2 | |
| 18. |
Which of the following will give phosphoric acid one reaction with water_________________? |
| A. | PCI5 |
| B. | P2O3 |
| C. | P2O5 |
| D. | All of the above |
| Answer» E. | |
| 19. |
Which of the following will have highest value of electron affinity_________________? |
| A. | F |
| B. | Cl |
| C. | Br |
| D. | I |
| Answer» C. Br | |
| 20. |
Which of the following will have the highest boiling point ? |
| A. | methanol |
| B. | ethanal |
| C. | propanal |
| D. | hexanone |
| Answer» E. | |
| 21. |
Which of the following will have very high rate of reaction ? |
| A. | Double decomposition reaction |
| B. | Neutralization reaction |
| C. | Ionic reactions |
| D. | all of above |
| Answer» E. | |
| 22. |
Which of the following will not change the concentration of ammonia at the equilibrium ? |
| A. | Increase of pressure |
| B. | Increase of volume |
| C. | Addition of catalyst |
| D. | Decrease of temperature |
| Answer» D. Decrease of temperature | |
| 23. |
Which of the following will not form crystalline structure with opporitely charged ions_________________? |
| A. | H+ |
| B. | H- |
| C. | Mg2+ |
| D. | Ca2+ |
| Answer» B. H- | |
| 24. |
Which of the following will not give addition reaction with NaHSO3________________? |
| A. | HCHO |
| B. | CH3CHO |
| C. | CH3-CH2-CHO |
| D. | None of the above |
| Answer» D. None of the above | |
| 25. |
Which of the halogen can displace other three elements ? |
| A. | Flourine |
| B. | Chlorine |
| C. | Iodine |
| D. | Bromine |
| Answer» B. Chlorine | |
| 26. |
Which of the halogen has highest electronegativity ? |
| A. | Fluorine |
| B. | Chlorine |
| C. | Bromine |
| D. | Iodine |
| Answer» B. Chlorine | |
| 27. |
Which of the p-block elements are not representative elements ? |
| A. | Alkali metals (I-A) |
| B. | Group-14 elements (IV-A) |
| C. | Group-18 elements (VIII-A) |
| D. | Halogens (VII-A) |
| Answer» D. Halogens (VII-A) | |
| 28. |
Which of the solid does not contain covalent bond________________? |
| A. | Copper |
| B. | Ice |
| C. | Diamond |
| D. | Graphite |
| Answer» B. Ice | |
| 29. |
Which of the solid does not contain covalent bond__________________? |
| A. | copper |
| B. | ice |
| C. | diamond |
| D. | graphite |
| Answer» B. ice | |
| 30. |
Which of these gases diffuse more quickly than oxygen ? |
| A. | H2S |
| B. | NO |
| C. | Cl2 |
| D. | N2O |
| Answer» C. Cl2 | |
| 31. |
Which one can form complex ? |
| A. | Na |
| B. | Cr |
| C. | Li |
| D. | K |
| Answer» D. K | |
| 32. |
Which one does not exhibit aldol condensation___________________? |
| A. | Ethanal |
| B. | Acetone |
| C. | Benzaldehyde |
| D. | Butanone |
| Answer» D. Butanone | |
| 33. |
Which one does not give borax bead test_________________? |
| A. | Copper sulphate |
| B. | Barium sulphate |
| C. | Cobalt sulphate |
| D. | Nickel sulphate |
| Answer» C. Cobalt sulphate | |
| 34. |
Which one exhibits aldol condensation____________________? |
| A. | HCHO |
| B. | C6H5CHO |
| C. | Cl3CCHO |
| D. | CH3COCH3 |
| Answer» E. | |
| 35. |
Which one has maximum number of unpaired electrons ? |
| A. | 6X |
| B. | 7Y |
| C. | 9Z |
| D. | 13W |
| Answer» C. 9Z | |
| 36. |
Which one has the lowest density at room temperature ? |
| A. | Ne |
| B. | N2 |
| C. | NH3 |
| D. | CO |
| Answer» D. CO | |
| 37. |
Which one is a conductor but is not malleable ? |
| A. | Iron |
| B. | Graphite |
| C. | Silver |
| D. | Platinum |
| Answer» C. Silver | |
| 38. |
Which one is Chloroform_________________? |
| A. | CH2Cl2 |
| B. | CH3Cl |
| C. | CHCl3 |
| D. | CCl4 |
| Answer» D. CCl4 | |
| 39. |
Which one is false for evaporation ? |
| A. | Surface phenomenon |
| B. | Continuous |
| C. | Exothermic |
| D. | Cause cooling |
| Answer» D. Cause cooling | |
| 40. |
Which one is least ionic in nature and decompose on heating ? |
| A. | LiOH |
| B. | NaOH |
| C. | KOH |
| D. | CsOH |
| Answer» B. NaOH | |
| 41. |
Which one is natron ? |
| A. | Na2CO3 |
| B. | Na2CO3.10H2O |
| C. | Na2CO3.H2O |
| D. | NaHCO3 |
| Answer» D. NaHCO3 | |
| 42. |
Which one is not a nucleophile ? |
| A. | C2H5O- |
| B. | SCN- |
| C. | NH3 |
| D. | H3C+ |
| Answer» E. | |
| 43. |
Which one is not state function ________________? |
| A. | Internal energy |
| B. | Enthalpy |
| C. | Gibbs free energy |
| D. | Work |
| Answer» E. | |
| 44. |
Which one is not the absolute term of the element _________________ ? |
| A. | Ionization energy |
| B. | Electron affinity |
| C. | Electro negativity |
| D. | Atomic size |
| Answer» D. Atomic size | |
| 45. |
Which one is not the partial pressure of oxygen in the lungs ? |
| A. | 0.1526 atm |
| B. | 116 mm of Hg |
| C. | 116 torr |
| D. | 1 atm |
| Answer» E. | |
| 46. |
Which one is not the use of silicones________________________? |
| A. | Lubricant |
| B. | Water repellent film |
| C. | Rubber sheet |
| D. | Medicine |
| Answer» E. | |
| 47. |
Which one is not true about cathode rays ? |
| A. | 9.11×10-31 Kg |
| B. | Cast shadow |
| C. | Heat up the platinum foil |
| D. | Cannot ionize |
| Answer» E. | |
| 48. |
Which one is the right value for R ? |
| A. | 0.0821 atm dm3k-1mol- |
| B. | 0.0821 atm m3k-1mol-1 |
| C. | 2 cal k-1 mol-1 |
| D. | 8.314 Nm2k-1mol-1 |
| Answer» B. 0.0821 atm m3k-1mol-1 | |
| 49. |
Which one is true about isotope ? |
| A. | Same number of neutrons |
| B. | Same mass number |
| C. | Same physical properties |
| D. | Same chemical properties |
| Answer» E. | |
| 50. |
Which one of following amino acid is neither acidic nor a basic in nature ? |
| A. | Lysine |
| B. | Histidine |
| C. | Proline |
| D. | Glutamic acid |
| Answer» D. Glutamic acid | |