MCQOPTIONS
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MCQOPTIONS
This section includes 29 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. |
Which of the following is different with respect to physical appearance? |
| A. | Arsenic |
| B. | Phosphorus |
| C. | Antimony |
| D. | Bismuth |
| Answer» C. Antimony | |
| 2. |
Which one of the followings possesses melting point below 0?C? |
| A. | Nitrogen |
| B. | Phosphorus |
| C. | Carbon |
| D. | Bismuth |
| Answer» B. Phosphorus | |
| 3. |
Compounds of nitrogen and phosphorus are mostly |
| A. | Ionic |
| B. | Covalent |
| C. | Polar |
| D. | All varieties are possible |
| Answer» C. Polar | |
| 4. |
SO3 is not absorbed in water directly because |
| A. | Reaction is exothermic |
| B. | It is insoluble in water |
| C. | Dilute acid is produced |
| D. | All of above |
| Answer» B. It is insoluble in water | |
| 5. |
Phosphene gas will be produced if phosphorous acid is subjected to |
| A. | Oxidation |
| B. | Reduction |
| C. | Decomposition |
| D. | Both b & c |
| Answer» E. | |
| 6. |
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. | |
| 7. |
Which one of following is not a property of pure quartz? |
| A. | Coloured solid |
| B. | Brittle |
| C. | Hard |
| D. | All of above |
| Answer» B. Brittle | |
| 8. |
Phosphorus is a Greek word and it means |
| A. | Light bearing |
| B. | Fire |
| C. | Impure |
| D. | Tetrahedral |
| Answer» B. Fire | |
| 9. |
Which of the following does not contain phosphorus? |
| A. | Yolk of egg |
| B. | Bone |
| C. | Nerves |
| D. | Steel |
| Answer» E. | |
| 10. |
Allotropic form of phosphorus that is poisonous is |
| A. | White |
| B. | Red |
| C. | Black |
| D. | Violet |
| Answer» B. Red | |
| 11. |
Which one of the following is not the use of graphite? |
| A. | Lead pencils |
| B. | Abrasive |
| C. | Lubricant |
| D. | Electrode of electrolytic cell |
| Answer» C. Lubricant | |
| 12. |
Acetic anhydride can be obtained by treating ethyl alcohol with |
| A. | P2O5 |
| B. | H2SO4 |
| C. | Both a and b |
| D. | PCI5 |
| Answer» D. PCI5 | |
| 13. |
The composition of brown ring in nitrate test is |
| A. | FeSO4.No |
| B. | FeSO4.No2 |
| C. | FeSO4.No3 |
| D. | FeSO4.N2o |
| Answer» B. FeSO4.No2 | |
| 14. |
Phosphorous acid upon thermal decomposition yields phosphoric acid and |
| A. | Phosphine |
| B. | Phosphorus |
| C. | Water |
| D. | Phosphorus pentoxide |
| Answer» B. Phosphorus | |
| 15. |
Which one of the following compounds usually smells like garlic? |
| A. | P2O3 |
| B. | P2O5 |
| C. | H3PO3 |
| D. | All have same smell |
| Answer» B. P2O5 | |
| 16. |
P2O5 is a hygroscopic powder which sublimes at |
| A. | 260?C |
| B. | 360?C |
| C. | 630?C |
| D. | 620?C |
| Answer» C. 630?C | |
| 17. |
The element of group VIA which is a non-metal is |
| A. | S |
| B. | Se |
| C. | Te |
| D. | Po |
| Answer» B. Se | |
| 18. |
Phosphoric acid is a weak acid and its basicity is |
| A. | 1 |
| B. | 3 |
| C. | Zero |
| D. | 2 |
| Answer» C. Zero | |
| 19. |
All the elements in group VIA are _______ in nature. |
| A. | Hygroscopic |
| B. | Metals |
| C. | Polymeric |
| D. | All of above |
| Answer» D. All of above | |
| 20. |
Which of the elements show passivity when treated with conc. HNO3. |
| A. | Fe |
| B. | A? |
| C. | Cr |
| D. | All of the above |
| Answer» E. | |
| 21. |
Which allotropic form of phosphorous is the most stable? |
| A. | White |
| B. | Black |
| C. | Red |
| D. | Violet |
| Answer» C. Red | |
| 22. |
The gas which cannot be dried by conc. H2SO4 |
| A. | SO2 |
| B. | H2S |
| C. | CO2 |
| D. | C2H4 |
| Answer» C. CO2 | |
| 23. |
The chemical composition of cinnabar is |
| A. | ZnS |
| B. | PbS |
| C. | HgS |
| D. | FeS |
| Answer» D. FeS | |
| 24. |
FeSO4 forms brown ring with |
| A. | N2O3 |
| B. | NO2 |
| C. | NO |
| D. | N2O |
| Answer» D. N2O | |
| 25. |
Oxygen and sulphur resemble in all except |
| A. | Electronic conviguration of valence shell electrons |
| B. | Show allotropy |
| C. | Polymeric |
| D. | Show same oxidation state |
| Answer» E. | |
| 26. |
Oxygen does not react with all except |
| A. | Alkali |
| B. | Acid |
| C. | Water |
| D. | Metals |
| Answer» E. | |
| 27. |
Arsenic oxides are removed by passing through |
| A. | Ferric hydroxide |
| B. | Sodium hydroxide |
| C. | Calcium hydroxide |
| D. | Aluminium hydroxide |
| Answer» B. Sodium hydroxide | |
| 28. |
In which compound nitrogen has maximum oxidation state |
| A. | N2O |
| B. | NO2 |
| C. | HNO2 |
| D. | HNO3 |
| Answer» E. | |
| 29. |
When sulphuric acid is treated with ethanol sulphuric acid behaves like |
| A. | An acid |
| B. | A dehydrating agent |
| C. | An oxidizing agent |
| D. | As sulphonating agent |
| Answer» C. An oxidizing agent | |