MCQOPTIONS
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MCQOPTIONS
This section includes 335 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A bond formed by the transfer of electrons between atoms of the elements is called |
| A. | ionic bond |
| B. | covalent bond |
| C. | co-ordinate bond |
| D. | Hydrogen bond |
| Answer» B. covalent bond | |
| 2. |
The structure of ethylene is |
| A. | linear |
| B. | tetrahedral |
| C. | octahedral |
| D. | triangular |
| Answer» E. | |
| 3. |
A bond formed by sharing of electrons between atoms of the elements is called |
| A. | ionic bond |
| B. | covalent bond |
| C. | co-ordinate bond |
| D. | none |
| Answer» C. co-ordinate bond | |
| 4. |
The number of - bonds in N2 molecule is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 5. |
What are the types of bonds present in CuSO4 5H2O ? |
| A. | Electrovalent and covalent |
| B. | Electrovalent and co-ordinate |
| C. | Electrovalent, covalent, co-ordinate and hydrogen bond |
| D. | Covalent and co-ordinate covalent |
| Answer» D. Covalent and co-ordinate covalent | |
| 6. |
The compound which contains ionic bond is? |
| A. | CH |
| B. | N |
| C. | CaCI |
| D. | CCI |
| Answer» D. CCI | |
| 7. |
Formation of cation occurs by |
| A. | gain of electron |
| B. | loss of electron |
| C. | gain of protons |
| D. | loss of proton |
| Answer» C. gain of protons | |
| 8. |
The octet rule is not valid for which one of the following molecule ? |
| A. | CO |
| B. | H |
| C. | S |
| D. | NH |
| E. | BF |
| Answer» E. BF | |
| 9. |
Formation of anions occurs by |
| A. | loss of neutrons |
| B. | gain of protons |
| C. | gain of electrons |
| D. | none |
| Answer» D. none | |
| 10. |
H2O is liquid and H2 is a gas because |
| A. | oxygen forms stronger hydrogen bond than sulphur |
| B. | oxygen less electronegative than sulphur |
| C. | atomic radius of oxygen is less than that of sulpur |
| D. | atomic radius of oxygen is greater than that of sulpur |
| Answer» B. oxygen less electronegative than sulphur | |
| 11. |
With reference to ionic compounds, consider the following statement:(1) Ionic compounds are insoluble in alcohol.(2) Ionic compounds in the solid state are good conductor of electricity Which of these statements is/are correct ? |
| A. | Only 1 |
| B. | Only 2 |
| C. | Both 1 and 2 |
| D. | Neither 1 nor 2 |
| Answer» B. Only 2 | |
| 12. |
The maximum number of hydrogen bonds in a H2O molecule is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 13. |
Strongest bond is |
| A. | C = C |
| B. | C - C |
| C. | C C |
| D. | all are equally stong |
| Answer» D. all are equally stong | |
| 14. |
Hydrogen bonding is maximum in |
| A. | Ethanol |
| B. | Diethyl ether |
| C. | Ethyl chloride |
| D. | Triethyl amine |
| Answer» B. Diethyl ether | |
| 15. |
Which of following compound in non-polar ? |
| A. | HCI |
| B. | CH |
| C. | CI |
| D. | CHCI |
| E. | CCI |
| Answer» E. CCI | |
| 16. |
Vander Wall's force is maximum in |
| A. | HBr |
| B. | LiBr |
| C. | LiCI |
| D. | AgBr |
| Answer» E. | |
| 17. |
Which one has hydrogen bonding ? |
| A. | HCI |
| B. | HBr |
| C. | HF |
| D. | HI |
| Answer» D. HI | |
| 18. |
Which molecule has one unpaired electron ? |
| A. | NO |
| B. | CO |
| C. | O |
| D. | None of these |
| Answer» B. CO | |
| 19. |
Which has Covalent bond ? |
| A. | Na |
| B. | S |
| C. | AICI |
| D. | NaH |
| E. | MgCI |
| Answer» C. AICI | |
| 20. |
NaCI has |
| A. | covalent bond |
| B. | ionic bond |
| C. | co-ordinate bond |
| D. | none |
| Answer» C. co-ordinate bond | |
| 21. |
The geometry of CCI4 is |
| A. | tetrahedral |
| B. | triangular |
| C. | Linear |
| D. | octahedral |
| Answer» B. triangular | |
| 22. |
The number of o-bond in H2 molecule is |
| A. | 2 |
| B. | 3 |
| C. | 1 |
| D. | 4 |
| Answer» D. 4 | |
| 23. |
The hybridization of C in CO2 is |
| A. | sp |
| B. | sp |
| C. | sp |
| D. | None of these |
| Answer» B. sp | |
| 24. |
Which one of the following is the correct statement ? The force binding the nucleons inside the nucleus is : |
| A. | charge dependent |
| B. | strong and highly repulsive |
| C. | a central force |
| D. | charge independent |
| Answer» E. | |
| 25. |
What is the term used to denote the critical temperature at which the air becomes saturated with vapour and below which the condensation is likely to begin ? |
| A. | Condensation point |
| B. | Evaporation point |
| C. | Dew point |
| D. | Point of critical temperature. |
| Answer» D. Point of critical temperature. | |
| 26. |
Soap helps in cleaning clothes, because |
| A. | chemical of soap change |
| B. | it increases the surface tension of the solution |
| C. | it absorbs the dirt |
| D. | it lowers the surface tension of the solution |
| Answer» E. | |
| 27. |
Which one of the following mixtures is homogeneous? |
| A. | Starch and sugar |
| B. | Methanol and water |
| C. | Graphite and charcoal |
| D. | Calcium carbonate and calcium bicarbonate |
| Answer» C. Graphite and charcoal | |
| 28. |
Increase in the atomic radii in a group is due to increase in the number of |
| A. | neutrons |
| B. | electrons |
| C. | protons |
| D. | shells |
| Answer» E. | |
| 29. |
The value of ionic product of water is |
| A. | 298K |
| B. | 198K |
| C. | 892K |
| D. | 928K |
| Answer» B. 198K | |
| 30. |
The second ionization energy of Mg is |
| A. | 1450kJmol |
| B. | 1451kJmol |
| C. | 1453kJmol |
| D. | 1452kJmol |
| Answer» B. 1451kJmol | |
| 31. |
The atomic number of carbon is |
| A. | 1 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» D. 7 | |
| 32. |
The number of electrons in valence shell of first element of period is |
| A. | two |
| B. | one |
| C. | three |
| D. | four |
| Answer» C. three | |
| 33. |
the Ionic radius of hydrogen in pm is |
| A. | 207 |
| B. | 208 |
| C. | 205 |
| D. | 206 |
| Answer» C. 205 | |
| 34. |
The covalent radius of carbon is |
| A. | 77.2pm |
| B. | 77.3pm |
| C. | 77.5pm |
| D. | 77.4pm |
| Answer» C. 77.5pm | |
| 35. |
The bond length in C-C is |
| A. | 0.134 |
| B. | 0.154 |
| C. | 0.116 |
| D. | 0.112 |
| Answer» C. 0.116 | |
| 36. |
The energy of an element which is required to remove an electron from its gaseous atom to form an ion is |
| A. | nuclear |
| B. | positional |
| C. | kinetic |
| D. | ionization |
| Answer» E. | |
| 37. |
The formation of compounds PF5, SF6, BCl3 are not according to the rule of |
| A. | octet |
| B. | doublet |
| C. | triplet |
| D. | none |
| Answer» B. doublet | |
| 38. |
Atomic radii is determined by measuring the distance between the centers of adjacent atoms with the help of |
| A. | X-rays |
| B. | Y-rays |
| C. | Z-rays |
| D. | none |
| Answer» B. Y-rays | |
| 39. |
The force of which ultimately results in difficult removal of electron is |
| A. | attraction force |
| B. | repulsive force |
| C. | electric force |
| D. | nuclear force |
| Answer» B. repulsive force | |
| 40. |
The valence electrons of Mg lies in |
| A. | 3s |
| B. | 3p |
| C. | 3d |
| D. | 2s |
| Answer» B. 3p | |
| 41. |
Free radical substitution is the over all reaction alkanes and halogens involving |
| A. | propagation step |
| B. | initiation step |
| C. | all of them |
| D. | termination step |
| Answer» D. termination step | |
| 42. |
The least volatile element is |
| A. | fluorine |
| B. | iodine |
| C. | chlorine |
| D. | bromine |
| Answer» C. chlorine | |
| 43. |
Fluorine is the most |
| A. | electronegative element |
| B. | positive element |
| C. | high tendency element |
| D. | a and b |
| Answer» B. positive element | |
| 44. |
The 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 | |
| 45. |
The distance between potassium chloride is equal to the sum of the radii of two ions, it is determined by |
| A. | Rutherford |
| B. | bohar |
| C. | alberuni |
| D. | Paul |
| Answer» E. | |
| 46. |
The atomic number of potassium is |
| A. | 17 |
| B. | 19 |
| C. | 16 |
| D. | 18 |
| Answer» C. 16 | |
| 47. |
In group of periodic table the ionization energy is |
| A. | increase |
| B. | decrease |
| C. | remain same |
| D. | changes time to time |
| Answer» C. remain same | |
| 48. |
The number of major groups which are vertical numbers is |
| A. | eight |
| B. | seven |
| C. | five |
| D. | nine |
| Answer» B. seven | |
| 49. |
When the two atoms come close to each other due to attractive forces then the potential energy of system is |
| A. | increased |
| B. | decreased |
| C. | finished |
| D. | none |
| Answer» C. finished | |
| 50. |
The electropositive elements are at a higher energy state then the |
| A. | ionic radii |
| B. | electronegative elements |
| C. | neutral elements |
| D. | atomic radii |
| Answer» C. neutral elements | |