MCQOPTIONS
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MCQOPTIONS
This section includes 30 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. |
Coordination number of the transition element in [Pt Cl NO2 (NH3)4]2- is |
| A. | 2 |
| B. | 6 |
| C. | 4 |
| D. | 8 |
| Answer» C. 4 | |
| 2. |
The location of transition elements is in between |
| A. | Lanthanides & actinides |
| B. | S and p block elements |
| C. | Chalcogens and halogens |
| D. | D and f block elements |
| Answer» C. Chalcogens and halogens | |
| 3. |
K2 (Cu(CN)4) which one is correct |
| A. | Potassium tetra cyano cupperate |
| B. | Co-ordination number is 2 |
| C. | Ligand is positively charged |
| D. | Central atom is present in avionic sphere |
| Answer» E. | |
| 4. |
The oxidation number of central metal atom in [Ni(CO)4] is |
| A. | 0 |
| B. | 2 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 5. |
Group VIB of transition elements contains |
| A. | Zn Cd Hg |
| B. | Fe Ru Os |
| C. | Cr Mo W |
| D. | Mn Te Re |
| Answer» D. Mn Te Re | |
| 6. |
The leements in which d or f orbitals are in the process of completion are |
| A. | Outer transition elements |
| B. | Inner transition elements |
| C. | Typical transition elements |
| D. | Transition elements |
| Answer» E. | |
| 7. |
The melting points and boiling points upto meddle of 3d- series |
| A. | Increases |
| B. | Decreases |
| C. | Remain same |
| D. | No regular trend |
| Answer» B. Decreases | |
| 8. |
Pure metal |
| A. | Corrode slowly |
| B. | Corrode rapidly |
| C. | Does not corrode easily |
| D. | None of these |
| Answer» D. None of these | |
| 9. |
Compounds attracted by applied strong magnetic field are called |
| A. | Diamagnetic |
| B. | Paramagnetic |
| C. | Good conductor |
| D. | Ferromagnetic |
| Answer» C. Good conductor | |
| 10. |
The correct electronic configuration of Cr is |
| A. | [Ar]4s23d4 |
| B. | [Ar] 4s23d4 |
| C. | [Ar]4s03d5 |
| D. | [Ar]4s13d5 |
| Answer» E. | |
| 11. |
The oxidation state of transition elements is usually |
| A. | Variable |
| B. | Constant |
| C. | Single |
| D. | Infinite |
| Answer» B. Constant | |
| 12. |
When light is exposed to transition element then electrons jump from lower orbitals to higher orbitals in |
| A. | Orbitals of f-subshell |
| B. | Orbitals of d-subshell |
| C. | Orbitals of p-subshell |
| D. | Both a & b |
| Answer» E. | |
| 13. |
Non-stoichiometric compounds of transition elements are called |
| A. | Hydrates |
| B. | Hydrides |
| C. | Binary compounds |
| D. | Interstitial compounds |
| Answer» E. | |
| 14. |
When a compound of transition element is dissolved in a solution of salt then it produces |
| A. | Simples ions |
| B. | Complex ions |
| C. | Double salts |
| D. | Strong anions |
| Answer» C. Double salts | |
| 15. |
The specie which donates electrons to central metal atom in coordination sphere is called |
| A. | Anion |
| B. | Cation |
| C. | Ligand is positively charged |
| D. | Acid |
| Answer» D. Acid | |
| 16. |
The species which donate two electron pairs in a coordination compound is called |
| A. | Ligand |
| B. | Mono-dentate ligand |
| C. | Poly-dentate ligand |
| D. | Bi-dentate ligand |
| Answer» E. | |
| 17. |
Which of the following can form a chealate |
| A. | Ammine |
| B. | Oxalato |
| C. | Carbonyl |
| D. | Cyano |
| Answer» C. Carbonyl | |
| 18. |
The central atom along with ligands is called |
| A. | Complex ion |
| B. | Coordination sphere |
| C. | Ligand |
| D. | Complex compound |
| Answer» C. Ligand | |
| 19. |
The compound or complex ion which has a ring in its structure |
| A. | Polydentate ligand |
| B. | Chelate |
| C. | Monodentate ligand |
| D. | Hydrate |
| Answer» C. Monodentate ligand | |
| 20. |
In complex compounds the oxidation number is written in |
| A. | English |
| B. | Greek |
| C. | Roman numeral |
| D. | Hebrew |
| Answer» D. Hebrew | |
| 21. |
Geometry of the complex compounds usually depends upon |
| A. | Type of ligands |
| B. | Types of hybridization in the elements of ligands |
| C. | Hybridization of central metal |
| D. | All of above |
| Answer» D. All of above | |
| 22. |
When the central atom of coordination compound is sp3d2 hybridization the expected geometry will be |
| A. | Tetrahedral |
| B. | Square planar |
| C. | Trigonal bipyramidal |
| D. | Octahedral |
| Answer» E. | |
| 23. |
In pig iron the concentration of C-atom is |
| A. | 0.12 --- 0.25% |
| B. | 2.5 --- 4.5% |
| C. | 2.0 --- 4.0% |
| D. | 0.25 --- 2.5% |
| Answer» C. 2.0 --- 4.0% | |
| 24. |
In the production of wrought iron Mg Si and P are removed in the form of |
| A. | Oxides |
| B. | Silicates |
| C. | Slag |
| D. | Carbonates |
| Answer» D. Carbonates | |
| 25. |
With impurities like P and S the open hearth furnace is lined with. |
| A. | SiO2 |
| B. | Fe2O3 |
| C. | FeO |
| D. | CaO MgO |
| Answer» E. | |
| 26. |
The oxidation number in [MnO4]-2 |
| A. | 7 |
| B. | ?7 |
| C. | 6 |
| D. | ?6 |
| Answer» D. ?6 | |
| 27. |
Which is sold as fertilizer |
| A. | CaSiO3 |
| B. | Na2SiO3 |
| C. | Ca3(PO4)2 |
| D. | MnSiO3 |
| Answer» D. MnSiO3 | |
| 28. |
Any process of chemical decay of metals due to the action of surrounding medium is called |
| A. | Activation |
| B. | Enameling |
| C. | Corrosion |
| D. | Coating |
| Answer» D. Coating | |
| 29. |
When an active metal like Al comes in contact with less active element like Cu then it produces |
| A. | Dry cell |
| B. | Galvanic cell |
| C. | Electrolytic cell |
| D. | A and b |
| Answer» C. Electrolytic cell | |
| 30. |
Which of the following is typical transition metal? |
| A. | Sc |
| B. | Y |
| C. | Cd |
| D. | Co |
| Answer» E. | |