MCQOPTIONS
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MCQOPTIONS
This section includes 50 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. |
The relative attraction of the nucleus for the electrons in a chemical bond is called |
| A. | Ionization energy |
| B. | Electron affinity |
| C. | Electro negativity |
| D. | None of the above |
| Answer» D. None of the above | |
| 2. |
The ionization energy |
| A. | Generally increases from left to right in a period |
| B. | Does not change in a period |
| C. | Increase from top to bottom in a group |
| D. | Does not change in a group |
| Answer» B. Does not change in a period | |
| 3. |
Which of the following will have highest value of electron affinity |
| A. | F |
| B. | Cl |
| C. | Br |
| D. | I |
| Answer» C. Br | |
| 4. |
Which type of bond is formed by overlap of p orbitals |
| A. | Pi (?) |
| B. | Sigma(?) |
| C. | Both |
| D. | Neither |
| Answer» D. Neither | |
| 5. |
The octet rule does not always hold for which of the following elements |
| A. | C |
| B. | O |
| C. | F |
| D. | P |
| Answer» E. | |
| 6. |
Which of the solid does not contain covalent bond |
| A. | Copper |
| B. | Ice |
| C. | Diamond |
| D. | Graphite |
| Answer» B. Ice | |
| 7. |
Which of the following is the best explanation that CO2 is non polar molecule |
| A. | Linear geometry |
| B. | Dipole moment is zero |
| C. | Sp hybridization |
| D. | None |
| Answer» C. Sp hybridization | |
| 8. |
Shielding effect across the period |
| A. | Increases |
| B. | Decreases |
| C. | Constant |
| D. | None |
| Answer» D. None | |
| 9. |
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 | |
| 10. |
Molecular orbital which have higher energy than atomic orbitals is called |
| A. | Bonding molecular orbital |
| B. | Antibonding molecular orbital |
| C. | Hybrid orbital |
| D. | Super atomic orbital |
| Answer» C. Hybrid orbital | |
| 11. |
Unpaired electron in a molecule gives _________ character. |
| A. | Ferromagnetic |
| B. | Paramagnetic |
| C. | Diamagnetism |
| D. | Both a & b |
| Answer» C. Diamagnetism | |
| 12. |
Bond order for N2 molecule is |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 13. |
Product of charge and distance is called |
| A. | Pressure |
| B. | Bond length |
| C. | Work |
| D. | Dipole moment |
| Answer» E. | |
| 14. |
Which one shows high %age of the ionic character? |
| A. | H2O |
| B. | HF |
| C. | HCI |
| D. | HBr |
| Answer» C. HCI | |
| 15. |
Unit of dipole moment is |
| A. | Debye |
| B. | Poise |
| C. | Pascal |
| D. | Newton |
| Answer» B. Poise | |
| 16. |
A specie with maximum number of unpaired electrons. |
| A. | F |
| B. | H2O |
| C. | HF |
| D. | NH-2 |
| Answer» E. | |
| 17. |
Which of the following have their outer most shell complete in atomic form? |
| A. | Noble gases |
| B. | Alkali metals |
| C. | Coinage metals |
| D. | Gun metals |
| Answer» B. Alkali metals | |
| 18. |
Force responsible to hold atoms together in a compound is called |
| A. | Bond |
| B. | Attractive force |
| C. | Interaction |
| D. | All of above represent same entity |
| Answer» B. Attractive force | |
| 19. |
Energy of atom in compound is |
| A. | Higher than individual |
| B. | Lesser than individual |
| C. | No change |
| D. | Impossible to predict |
| Answer» C. No change | |
| 20. |
In a period the atomic radii |
| A. | Increases |
| B. | Decreases |
| C. | Remain same |
| D. | First decreases then increases |
| Answer» C. Remain same | |
| 21. |
An atom loses or gains electrons to |
| A. | Gain stability |
| B. | Form a bond |
| C. | Complete its outermost shell |
| D. | All are accurate justifications |
| Answer» E. | |
| 22. |
In a group ionic radii |
| A. | Increases |
| B. | Decreases |
| C. | No change |
| D. | Variable trend |
| Answer» B. Decreases | |
| 23. |
Energy required to remove electron from an atom |
| A. | Ionization potential |
| B. | Electronegativity |
| C. | Electron affinity |
| D. | Activation energy |
| Answer» B. Electronegativity | |
| 24. |
Ionization energy in a period generally |
| A. | Increases |
| B. | Decreases |
| C. | No change |
| D. | Variable trend |
| Answer» B. Decreases | |
| 25. |
Greater shielding effect corresponds to ionization energy value |
| A. | Greater |
| B. | Lesser |
| C. | Remain same |
| D. | No effect |
| Answer» C. Remain same | |
| 26. |
Elements having high I.P values are |
| A. | Metals |
| B. | Non metals |
| C. | Liquids |
| D. | Solids |
| Answer» C. Liquids | |
| 27. |
Energy released or absorbed when electrons are added in atom is |
| A. | Ionization potential |
| B. | Electronegativity |
| C. | Electron affinity |
| D. | Activation energy |
| Answer» D. Activation energy | |
| 28. |
In a period electronegativity from left to right |
| A. | Increases |
| B. | Decreases |
| C. | Remain constant |
| D. | Variable trend |
| Answer» B. Decreases | |
| 29. |
Ionic bond is produced after complete transfer of |
| A. | Nucleus |
| B. | Neutrons |
| C. | Electrons |
| D. | Protons |
| Answer» D. Protons | |
| 30. |
Elements of group IA IIA are |
| A. | Electronegative |
| B. | Electropositive |
| C. | Neutral |
| D. | IA is electropositive while IIA is electronegative |
| Answer» C. Neutral | |
| 31. |
Bond will beionic when E.N difference of bonded atom is |
| A. | Equal to 1.7 |
| B. | Greater than 1.7 |
| C. | Less than 1.7 |
| D. | No specificity exists |
| Answer» C. Less than 1.7 | |
| 32. |
Mostly ionic compound are produced in between elements of |
| A. | IA and VIA |
| B. | IA IIA and VIIA |
| C. | IB and VIIB |
| D. | IA and IB |
| Answer» C. IB and VIIB | |
| 33. |
Which one of the following has polar covalent bond? |
| A. | HF |
| B. | CH4 |
| C. | H2 |
| D. | N2 |
| Answer» B. CH4 | |
| 34. |
The Lewis acids are |
| A. | Electron deficient |
| B. | Electron rich |
| C. | Octet is complete |
| D. | No such acids exist |
| Answer» B. Electron rich | |
| 35. |
Sharing of 1 electron pair by one specie forms |
| A. | Single covalent bond |
| B. | Hydrogen bond |
| C. | Double covalent bond |
| D. | Coordinate covalent bond |
| Answer» E. | |
| 36. |
Angle in water molecule is |
| A. | 104.9? |
| B. | 104.5? |
| C. | 109.5? |
| D. | 120? |
| Answer» C. 109.5? | |
| 37. |
The geometry of ammonia is |
| A. | Tetrahedral |
| B. | Square planner |
| C. | Trigonal bipyramidal |
| D. | Trigonal Pyramidal |
| Answer» E. | |
| 38. |
Orbitals of same energy produced after mixing of orbitals of different energy are called |
| A. | Degenerate orbitals |
| B. | Generate orbitals |
| C. | Hybrid orbitals |
| D. | Zeeman orbitals |
| Answer» B. Generate orbitals | |
| 39. |
By combining n atmic orbitals no. of hybrid orbitals will be |
| A. | 2n |
| B. | N |
| C. | 3n |
| D. | Impossible to predict |
| Answer» C. 3n | |
| 40. |
on sp3 hybridization |
| A. | All p-orbitals are involved |
| B. | One s and 3 p-orbitals are involved |
| C. | One p-orbital is involved |
| D. | Four p-orbitals are involved |
| Answer» C. One p-orbital is involved | |
| 41. |
Geometry of simple molecule having sp3 hybrid orbital is |
| A. | Triangular |
| B. | Tetrahedral |
| C. | Square planner |
| D. | Linear |
| Answer» C. Square planner | |
| 42. |
Geometry of molecule will be pyramidal if the outer post shell of the central atom has |
| A. | 3 bond pair one lone pair |
| B. | 2 bond pair 2 lone pair |
| C. | 1 bond pair 3 lone pair |
| D. | 3 lone pair 1 bond pair |
| Answer» B. 2 bond pair 2 lone pair | |
| 43. |
Pi bonds are produced by overlapping of |
| A. | Un-hybrid orbitals |
| B. | Hybrid orbitals |
| C. | Hybrid and un hybrid orbitals |
| D. | Atomic orbital and hybrid orbital |
| Answer» B. Hybrid orbitals | |
| 44. |
According to VESPR Model the geometry of molecule having 5 bond pair in outer most shell will be |
| A. | Triangular |
| B. | Square planner |
| C. | Trigonal bipyramidal |
| D. | Octahedral |
| Answer» D. Octahedral | |
| 45. |
Which one has maximum number of unpaired electrons? |
| A. | 6X |
| B. | 7Y |
| C. | 9Z |
| D. | 13W |
| Answer» C. 9Z | |
| 46. |
When 2 lone pair and 2 bond pair are around the central atom reduction in the bond angle is up to. |
| A. | 109.5? |
| B. | 104.5? |
| C. | 107.5? |
| D. | 102? |
| Answer» C. 107.5? | |
| 47. |
In O2 each oxygen atom is hybridized |
| A. | Sp3 |
| B. | Sp2 |
| C. | Sp |
| D. | All |
| Answer» C. Sp | |
| 48. |
The molecule having ?-bond |
| A. | H2O |
| B. | C2H6 |
| C. | O2 |
| D. | NH3 |
| Answer» D. NH3 | |
| 49. |
Molecular orbitals are filled according to |
| A. | Auf bau principle |
| B. | Hunds rule |
| C. | Paulis Exclusion principle |
| D. | All these |
| Answer» E. | |
| 50. |
Measurement of the degree of polarity is |
| A. | Electron affinity |
| B. | Ionic character |
| C. | Ionization energy |
| D. | Dipole moment |
| Answer» E. | |