MCQOPTIONS
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MCQOPTIONS
This section includes 46 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. |
Elements in the same vertical group of the periodic table have same |
| A. | Number of valence electrons |
| B. | Atomic number |
| C. | Atomic mass |
| D. | Atomic volume |
| Answer» B. Atomic number | |
| 2. |
An element having low value of ionization energy and low value of electron affinity is likely to belong to |
| A. | Group IA |
| B. | Group IB |
| C. | Group VIIA |
| D. | Group VIII |
| Answer» B. Group IB | |
| 3. |
Which of the following always increases on going from top to bottom in a group? |
| A. | Metallic character |
| B. | Electronegativity |
| C. | Oxidizing power |
| D. | Tendency to get reduced |
| Answer» B. Electronegativity | |
| 4. |
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) | |
| 5. |
Among halogens the highest boiling point is of |
| A. | Flrorine |
| B. | Chlorine |
| C. | Bromine |
| D. | Iodine |
| Answer» E. | |
| 6. |
Which of the following will not form crystalline structure with opporitely charged ions |
| A. | H+ |
| B. | H- |
| C. | Mg2+ |
| D. | Ca2+ |
| Answer» B. H- | |
| 7. |
The scientist who did not contribute in the construction of periodic table? |
| A. | Al-Razi |
| B. | Moseley |
| C. | Dobereiner |
| D. | Democritus |
| Answer» E. | |
| 8. |
Periodic table provides a basic framework to study elements with respect to their |
| A. | Physical properties |
| B. | Chemical properties |
| C. | Properties of their compounds |
| D. | All |
| Answer» E. | |
| 9. |
Concept of Triads was introduced by |
| A. | Dobereiner |
| B. | Newland |
| C. | Mendeleev |
| D. | Al-Razi |
| Answer» B. Newland | |
| 10. |
Which element was not known when Mendeleev proposed his classification? |
| A. | Hydrogen |
| B. | Sodium |
| C. | Copper |
| D. | Germanium |
| Answer» E. | |
| 11. |
Elements with similar chemical properties appear in the |
| A. | Same family |
| B. | Same period |
| C. | P block elements |
| D. | Right upper corner |
| Answer» B. Same period | |
| 12. |
Keeping in view the size of atom which order is correct one? |
| A. | Mg > Sr |
| B. | Ba > Mg |
| C. | Lu > Ce |
| D. | C1 > I |
| Answer» C. Lu > Ce | |
| 13. |
Which one of the following element has highest exidation state in its compounds? |
| A. | Cr |
| B. | Mn |
| C. | Sn |
| D. | O |
| Answer» C. Sn | |
| 14. |
Which of the following cannot exist in solution |
| A. | O-2 |
| B. | H+ |
| C. | Cl- |
| D. | Na+ |
| Answer» B. H+ | |
| 15. |
Which of the following ion is stable in aqueous solution? |
| A. | H+ |
| B. | H- |
| C. | Cl- |
| D. | All are stable |
| Answer» D. All are stable | |
| 16. |
The atoms of same element having same atomic number but different mass number are called |
| A. | Isobars |
| B. | Isomers |
| C. | Isotopes |
| D. | Isotropes |
| Answer» D. Isotropes | |
| 17. |
Deuterium reacts with oxygen to form |
| A. | Hard water |
| B. | Heavy water |
| C. | Soft water |
| D. | Water gas |
| Answer» C. Soft water | |
| 18. |
Which order of ionization energy is correct |
| A. | Mg |
| B. | |
| C. | Si > P |
| D. | Mg > A1 |
| E. | Both b & c |
| Answer» D. Mg > A1 | |
| 19. |
Ionization energy depends upon |
| A. | Nuclear charge |
| B. | Atomic size |
| C. | Shielding effect |
| D. | I.E depends upon all of the above and nature of orbital |
| Answer» E. | |
| 20. |
Addition of 2nd electron to a uninegative ion is always |
| A. | Exothermic |
| B. | Endothermic |
| C. | Data is insufficient |
| D. | Unpredictable |
| Answer» C. Data is insufficient | |
| 21. |
Higher value of electron affinity means |
| A. | Atom will lose electron easily |
| B. | Atom will gain electron easily |
| C. | Atom may form di-positive ion |
| D. | The reason is unknown |
| Answer» C. Atom may form di-positive ion | |
| 22. |
Metallic characters of alkali metals |
| A. | Increase down the group |
| B. | Decrease down the group |
| C. | No regular trend |
| D. | Remain same |
| Answer» B. Decrease down the group | |
| 23. |
Melting points of VII-A group elements down the group |
| A. | Increase |
| B. | Decrease |
| C. | Remain constant |
| D. | No regular trend |
| Answer» B. Decrease | |
| 24. |
Oxidation state of an atom represents |
| A. | Number of electrons gained |
| B. | Number of electrons lost |
| C. | Apparent charge in compound |
| D. | Its vacancies |
| Answer» D. Its vacancies | |
| 25. |
Which of the following possesses maximum hydration energy? |
| A. | Na+ |
| B. | K+ |
| C. | Mg+2 |
| D. | Ca+2 |
| Answer» D. Ca+2 | |
| 26. |
Halides in which halogen atoms act as a bridge between two atoms of the other element are called |
| A. | Covalent halides |
| B. | Electronegative halides |
| C. | Polymeric halides |
| D. | Polymeric hydrides |
| Answer» D. Polymeric hydrides | |
| 27. |
Less electronegative elements such as Be Ga A? etc form |
| A. | Polymeric halide |
| B. | Covalent halide |
| C. | Ionic halide |
| D. | All |
| Answer» B. Covalent halide | |
| 28. |
Iodine is solid due to |
| A. | Strong covalent bond |
| B. | Large value of dipole moment |
| C. | High polarizability |
| D. | Strong hydrogen bonding |
| Answer» D. Strong hydrogen bonding | |
| 29. |
Inner transition elements are called |
| A. | Lanthanides |
| B. | Actinides |
| C. | Rare earth metals |
| D. | All |
| Answer» E. | |
| 30. |
Seventh period contains ______________ normal elements |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» B. 4 | |
| 31. |
Modern periodic table has been divided in _______ blocks |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 7 |
| Answer» C. 8 | |
| 32. |
Amphoteric exides are those which possess ________ properties |
| A. | Acidic |
| B. | Basic |
| C. | Acidic and basic |
| D. | Neutral and acidic |
| Answer» D. Neutral and acidic | |
| 33. |
Non-metals usually form ______________ oxides |
| A. | Acidic |
| B. | Amphoteric |
| C. | Neutral |
| D. | All of the above |
| Answer» B. Amphoteric | |
| 34. |
Best position of hydrogen in the periodic table is above I.A Group which is mainly due to |
| A. | Both are electropositive |
| B. | Similar outer most shell electronic configuration |
| C. | Both form ionic compounds |
| D. | All |
| Answer» E. | |
| 35. |
Hydrogen resembles with carbon because of having |
| A. | Same number of electrons in the valence shell |
| B. | Similar physical state |
| C. | Remarkable reducing properties |
| D. | Homovalent (show same valency) |
| Answer» D. Homovalent (show same valency) | |
| 36. |
Which one of the following sets consists of all coinage metals? |
| A. | Cu Hg Au |
| B. | Cu Ag Au |
| C. | Ag Au Hg |
| D. | Cu Fe Au |
| Answer» C. Ag Au Hg | |
| 37. |
In which of the following pairs are elements belonging to the same group? |
| A. | Boron & Beryllium |
| B. | Nitrogen & Phosphorous |
| C. | Magnesium & Aluminium |
| D. | Gallium & Helium |
| Answer» C. Magnesium & Aluminium | |
| 38. |
Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way? |
| A. | The nature of its oxides |
| B. | The charge on its ions |
| C. | The formula of its oxide |
| D. | Its number of isotopes |
| Answer» E. | |
| 39. |
Which one of the following is not a periodic property? |
| A. | Melting point of elements |
| B. | Boiling point of elements |
| C. | Ionization energy of elements |
| D. | Coordination number of ions |
| Answer» E. | |
| 40. |
The atomic radii decreases by increasing atomic number in |
| A. | Alkali metal |
| B. | Alkaline earth metal |
| C. | Elements from Li to Ne |
| D. | Halogens |
| Answer» D. Halogens | |
| 41. |
Which discovery caused a revision in the periodic law as stated by Mendeleev? |
| A. | Location of nucleus by Rutherford |
| B. | Atomic number by Moseley |
| C. | X-rays by Roentgen |
| D. | Natural radioactivity by Henry Bacquerel. |
| Answer» C. X-rays by Roentgen | |
| 42. |
An element has electronic conviguration 1s2 2s2 2p2. It belongs to |
| A. | Group II-A |
| B. | Group IV-A |
| C. | Group VII-A |
| D. | Group VI-A |
| Answer» C. Group VII-A | |
| 43. |
The property which increases upto group IV-A then decreases onwards |
| A. | Ionization energy |
| B. | Atomic radii |
| C. | Melting & boiling points |
| D. | Atomic volume |
| Answer» D. Atomic volume | |
| 44. |
Noble gases are named so because they are |
| A. | Less reactive |
| B. | Zero group elements |
| C. | Having completely filled valence shell |
| D. | All |
| Answer» E. | |
| 45. |
In modern periodic table all the leements are arranged in ascending order of |
| A. | Valency |
| B. | Atomic mass |
| C. | Atomic number |
| D. | Valence electrons |
| Answer» D. Valence electrons | |
| 46. |
The longest period in the modern periodic table is |
| A. | 6th |
| B. | 7th |
| C. | 2nd and 3rd both |
| D. | 5th |
| Answer» B. 7th | |