MCQOPTIONS
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MCQOPTIONS
This section includes 402 Mcqs, each offering curated multiple-choice questions to sharpen your UPSEE knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
atomic number of Argon is |
| A. | 16 |
| B. | 18 |
| C. | 11 |
| D. | 12 |
| Answer» C. 11 | |
| 2. |
Refractory materials are examples of |
| A. | ionic bonds |
| B. | covalent bonds |
| C. | metallic bonds |
| D. | dative bond |
| Answer» B. covalent bonds | |
| 3. |
A shared pair of electrons like Cl₂ forms |
| A. | ionic bonds |
| B. | single covalent bond |
| C. | double covalent bond |
| D. | dative bond |
| Answer» C. double covalent bond | |
| 4. |
For gaining stability element, it tends to get configuration of |
| A. | nearest halogen |
| B. | nearest alkali metal |
| C. | nearest noble gases |
| D. | nearest transition metal |
| Answer» D. nearest transition metal | |
| 5. |
Tetrahedral three dimensional lattices are a result of |
| A. | ionic bonds |
| B. | covalent bonds |
| C. | metallic bonds |
| D. | distillate |
| Answer» C. metallic bonds | |
| 6. |
Character of bonds which are formed between similar atoms are |
| A. | polar |
| B. | non-polar |
| C. | neutral |
| D. | polar and non-polar |
| Answer» C. neutral | |
| 7. |
The atomic radius of helium in pm is |
| A. | 32 |
| B. | 36 |
| C. | 35 |
| D. | 31 |
| Answer» E. | |
| 8. |
Ionization energy which is required to remove an electron after removal of first electron, is |
| A. | first |
| B. | second |
| C. | third |
| D. | fourth |
| Answer» C. third | |
| 9. |
Force of attraction in a crystal lattice which held positive and negative ion together is |
| A. | covalent |
| B. | electrostatic |
| C. | magnetic |
| D. | electric |
| Answer» C. magnetic | |
| 10. |
The length of double bonds (=) is |
| A. | shorter than single bonds |
| B. | longer than single bonds |
| C. | same as single bonds |
| D. | none of above |
| Answer» B. longer than single bonds | |
| 11. |
Van der Waal's forces increase with the increase in |
| A. | number of electrons |
| B. | number of protons |
| C. | number of contact points |
| D. | all of above |
| Answer» E. | |
| 12. |
Gap in 1st, 2nd,3rd and higher ionization energies help us to guess element's |
| A. | valence |
| B. | shells |
| C. | atomic number |
| D. | atomic size |
| Answer» B. shells | |
| 13. |
Potassium Oxide is formed through |
| A. | two potassium ions and one oxygen ion |
| B. | one potassium ion and one oxygen ion |
| C. | two potassium ions and two oxygen ion |
| D. | one potassium ion and two oxygen ion |
| Answer» B. one potassium ion and one oxygen ion | |
| 14. |
The electronegativity of hydrogen is |
| A. | 2.55 |
| B. | 3.04 |
| C. | 3.16 |
| D. | 2.2 |
| Answer» E. | |
| 15. |
In metals, outermost electrons become |
| A. | strongly attached to nucleus |
| B. | easily delocalized |
| C. | very hard to detach |
| D. | very easy to detach |
| Answer» C. very hard to detach | |
| 16. |
For stability of an isolated atom, ionization energy is |
| A. | quantitative measure |
| B. | qualitative measure |
| C. | normal measure |
| D. | regular measure |
| Answer» C. normal measure | |
| 17. |
Electron affinity is measure of attraction of nucleus of an atom for the |
| A. | same electron |
| B. | 1st electron |
| C. | 2nd electron |
| D. | extra electron |
| Answer» E. | |
| 18. |
Way atoms join together and combine with one another is called as |
| A. | isotopes |
| B. | alloys |
| C. | bonding |
| D. | dative bond |
| Answer» D. dative bond | |
| 19. |
Double covalent bond refers to sharing of |
| A. | one electron |
| B. | two electrons |
| C. | three electrons |
| D. | four electrons |
| Answer» E. | |
| 20. |
Ionization energies is influenced by atomic radius of |
| A. | atom |
| B. | electron |
| C. | proton |
| D. | ion |
| Answer» B. electron | |
| 21. |
Increase in atomic radii in a group is due to increase in number of |
| A. | neutrons |
| B. | electrons |
| C. | protons |
| D. | shells |
| Answer» E. | |
| 22. |
Melting and boiling points are examples of |
| A. | rigidity |
| B. | volatility |
| C. | solubility |
| D. | conductivity |
| Answer» C. solubility | |
| 23. |
Molecules having Van der Waals' forces have |
| A. | higher stability |
| B. | have high melting points |
| C. | have low melting points |
| D. | have high boiling points |
| Answer» D. have high boiling points | |
| 24. |
Tendency of an atom to attract a shared electron pair towards itself, is called its |
| A. | electron affinity |
| B. | ionization energy |
| C. | electro negativity |
| D. | atomic radii |
| Answer» D. atomic radii | |
| 25. |
First ionization energy of Mg is |
| A. | 737kJmol |
| B. | 738kJmol |
| C. | 734kJmol |
| D. | 736kJmol |
| Answer» C. 734kJmol | |
| 26. |
Shapes of molecules are formed by |
| A. | chemical combinations |
| B. | forming gases |
| C. | separation |
| D. | characterization |
| Answer» B. forming gases | |
| 27. |
Chemical reactivity depends upon |
| A. | sigma bond |
| B. | Pi bond |
| C. | size of atom |
| D. | size of molecule |
| Answer» C. size of atom | |
| 28. |
In Oxygen molecule (O₂), stability is gained through sharing of |
| A. | one electron |
| B. | two electrons |
| C. | three electrons |
| D. | four electrons |
| Answer» E. | |
| 29. |
The bond length is C=C is |
| A. | 0.154 |
| B. | 0.143 |
| C. | 0.134 |
| D. | 0.116 |
| Answer» D. 0.116 | |
| 30. |
Atomic radii is determined by measuring distance between centers of adjacent atoms with help of |
| A. | X-rays |
| B. | Y-rays |
| C. | Z-rays |
| D. | B-rays |
| Answer» B. Y-rays | |
| 31. |
The arrangement of Boron trifluoride (BF₃) molecules are |
| A. | linear |
| B. | tetrahedral |
| C. | hexagonal |
| D. | trigonal |
| Answer» E. | |
| 32. |
Elements tend to get 8 electrons in outermost shell ,this is known as |
| A. | doublet rule |
| B. | octet rule |
| C. | triplet rule |
| D. | quadrat rule |
| Answer» C. triplet rule | |
| 33. |
Noble gas cannot react with |
| A. | fluorine |
| B. | oxygen |
| C. | another noble gas |
| D. | carbon dioxide |
| Answer» D. carbon dioxide | |
| 34. |
Energy involved in bond formation is |
| A. | constant |
| B. | changes |
| C. | neutral |
| D. | none of these |
| Answer» C. neutral | |
| 35. |
The bond angles in water are |
| A. | 120° |
| B. | 109.5° |
| C. | 87.5° |
| D. | 104.5° |
| Answer» E. | |
| 36. |
Second electron is removed from a positively charged ion rather then a |
| A. | positive atom |
| B. | neutral atom |
| C. | negative atom |
| D. | nucleus |
| Answer» C. negative atom | |
| 37. |
When two atoms come close to each other due to attractive forces then potential energy of system is |
| A. | increased |
| B. | decreased |
| C. | finished |
| D. | doubled |
| Answer» C. finished | |
| 38. |
The boiling point of propane is |
| A. | −43 °C |
| B. | −42 °C |
| C. | −40 °C |
| D. | −24 °C |
| Answer» C. −40 °C | |
| 39. |
The attraction of water molecules to the ions on the surface of ionic solid is termed as |
| A. | ion-dipole attractions |
| B. | dipole interaction |
| C. | dipole reaction |
| D. | ion-attraction |
| Answer» B. dipole interaction | |
| 40. |
In ethane C₂H₄, hydrogen forms |
| A. | 1 σ-bond |
| B. | 2 σ-bonds |
| C. | 1 π-bond |
| D. | 2 π-bonds |
| Answer» C. 1 π-bond | |
| 41. |
Diamonds... |
| A. | cannot conduct electricity |
| B. | can conduct electricity |
| C. | have metallic bonds |
| D. | is an oxide |
| Answer» B. can conduct electricity | |
| 42. |
The number of bonding pairs of electrons in water H₂O is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 43. |
The molecular structure of SF₆ is |
| A. | linear |
| B. | tetrahedral |
| C. | hexagonal |
| D. | octahedral |
| Answer» E. | |
| 44. |
Electro negativity of hydrogen atom is |
| A. | 2.1 |
| B. | 2.2 |
| C. | 2.3 |
| D. | 2.4 |
| Answer» B. 2.2 | |
| 45. |
Property of ionic radius is |
| A. | additive |
| B. | multiplicative |
| C. | subtractive |
| D. | both a and b |
| Answer» B. multiplicative | |
| 46. |
The degree of the polarity of a molecule is measured as |
| A. | dipole moment |
| B. | dipole-dipole interaction |
| C. | dipole reaction |
| D. | none of above |
| Answer» B. dipole-dipole interaction | |
| 47. |
Formation of which ions is take place in Ca₂a ? |
| A. | tripositive |
| B. | dinegative |
| C. | dispositive |
| D. | trinegative |
| Answer» D. trinegative | |
| 48. |
Force of attraction decreases due to increase of |
| A. | stark effect |
| B. | shielding effect |
| C. | screening effect |
| D. | Zeeman effect |
| Answer» C. screening effect | |
| 49. |
When force of attraction decreases less energy is used in electron |
| A. | removal |
| B. | addition |
| C. | renewal |
| D. | conversion |
| Answer» B. addition | |
| 50. |
The bond energy of the C=O bond is |
| A. | 350 kJ/mol |
| B. | 610kJ/mol |
| C. | 360kJ/mol |
| D. | 740kJ/mol |
| Answer» E. | |