MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 259 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which one is not metal? |
| A. | Sulphur |
| B. | Sugar |
| C. | Nitrogen |
| D. | All of these |
| Answer» E. | |
| 2. |
Which one among the following does not have an allotrope ? |
| A. | Oxygen |
| B. | Sulphur |
| C. | Nitrogen |
| D. | Carbon |
| Answer» D. Carbon | |
| 3. |
Which of the following oxides is amphoteric in nature |
| A. | CO |
| B. | SiO |
| C. | SnO |
| D. | CaO |
| Answer» D. CaO | |
| 4. |
Which gas is evolved when H2O2 reacts with chlorine ? |
| A. | H |
| B. | O |
| C. | CIO |
| D. | None of these |
| Answer» C. CIO | |
| 5. |
Which of the following is a true peroxide ? |
| A. | NO |
| B. | MnO |
| C. | BaO |
| D. | SO |
| Answer» D. SO | |
| 6. |
The oxidation number of carbon in CH2O is |
| A. | Zero |
| B. | -2 |
| C. | +2 |
| D. | -4 |
| Answer» B. -2 | |
| 7. |
Decomposition od H2O2 is favoured by |
| A. | MnO |
| B. | Acetanilide |
| C. | Traces of acid |
| D. | All of them |
| Answer» B. Acetanilide | |
| 8. |
Which one is true peroxide ? |
| A. | PbO |
| B. | MnO |
| C. | CO |
| D. | H |
| E. | O |
| Answer» E. O | |
| 9. |
Bleaching action of chlorine is due to the formation of |
| A. | HCI |
| B. | H |
| C. | HCIO |
| D. | CI |
| E. | O |
| Answer» D. CI | |
| 10. |
Bleaching powder is obtained by the action of chlorine gas and |
| A. | Dry CO |
| B. | Dil. solution of Ca(OH) |
| C. | Dry slaked lime |
| D. | Conc. solution Ca(OH) |
| Answer» D. Conc. solution Ca(OH) | |
| 11. |
When water is electrolysed, then which of the following is formed ? |
| A. | D |
| B. | O |
| C. | O |
| D. | H |
| E. | Both (b) and (c) |
| Answer» E. Both (b) and (c) | |
| 12. |
Which of the following is formed by strong heating of potassium permanganate |
| A. | O |
| B. | Mn |
| C. | H |
| D. | None of these |
| Answer» B. Mn | |
| 13. |
Na2O is |
| A. | An acidic oxide |
| B. | An amphoteric oxide |
| C. | A basic oxide |
| D. | A natural oxide |
| Answer» D. A natural oxide | |
| 14. |
Which of the following is a pseudohalide ? |
| A. | ICI |
| B. | I |
| C. | CN |
| D. | IF |
| Answer» D. IF | |
| 15. |
When CO2 is passed through an aqueous solution of bleaching powder, the gas evolved is |
| A. | Chlorine |
| B. | Oxygen |
| C. | Ozone |
| D. | Chlorine dioxide |
| Answer» B. Oxygen | |
| 16. |
The number of unpaired electrons is O2 molecule is |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | None of these |
| Answer» C. 2 | |
| 17. |
Living in the atmosphere of CO is dangerous because it |
| A. | reduces organic matter of tissues |
| B. | dries up the blood |
| C. | combined with O |
| D. | present inside the form CO |
| E. | combines with heamoglobin and makes it incapable of absorbing oxygen |
| Answer» E. combines with heamoglobin and makes it incapable of absorbing oxygen | |
| 18. |
The percentage by weidht of hydrogen in H2O2 is |
| A. | 6.50 |
| B. | 5.68 |
| C. | 25 |
| D. | 50 |
| Answer» C. 25 | |
| 19. |
The fusion product of tritium is |
| A. | H |
| B. | He |
| C. | H |
| D. | He |
| Answer» E. | |
| 20. |
Poisonous gas present in fumes of motor car is |
| A. | CH |
| B. | C |
| C. | H |
| D. | CO |
| E. | CO |
| Answer» D. CO | |
| 21. |
H3BO3 is |
| A. | Monobasic and weak bronsted acid |
| B. | Monobasic and strong Lewis acid |
| C. | Tribasic and weak bronsted acid |
| D. | None of these |
| Answer» D. None of these | |
| 22. |
Which of the following least bond dissociation energy ? |
| A. | Cl |
| B. | Br |
| C. | I |
| D. | F |
| E. | 1 |
| Answer» D. F | |
| 23. |
Which one of the following is present in Teflon ? |
| A. | F |
| B. | CI |
| C. | Br |
| D. | I |
| Answer» B. CI | |
| 24. |
Bleaching powder is obtained by treating Cl2 with |
| A. | Ca(OH) |
| B. | CaCO |
| C. | CaCOCI |
| D. | CaO |
| Answer» B. CaCO | |
| 25. |
In manufacture of glass the addition of MnO2 gives |
| A. | Yellow colur |
| B. | Red colour |
| C. | Violet colour |
| D. | Pink colour |
| Answer» E. | |
| 26. |
PH3 is an example of |
| A. | Ionic hydride |
| B. | Covalent hydride |
| C. | Metalic hydride |
| D. | Polymeric hydride |
| Answer» C. Metalic hydride | |
| 27. |
Which has covalent polymeric structure ? |
| A. | BeH |
| B. | MgH |
| C. | CsH |
| D. | Both (a) and (b) |
| Answer» E. | |
| 28. |
Which of the following undergoes sublimation |
| A. | NH |
| B. | Cl |
| C. | CuCl |
| D. | AgCl |
| E. | ZnCl |
| Answer» B. Cl | |
| 29. |
Marsh gas contains |
| A. | CO |
| B. | CH |
| C. | N |
| D. | C |
| E. | H |
| Answer» C. N | |
| 30. |
Ozone is easily detected by use by |
| A. | Ag |
| B. | Hg |
| C. | AgCl |
| D. | H |
| E. | O |
| Answer» C. AgCl | |
| 31. |
A gas that can not be collected over water is |
| A. | N |
| B. | O |
| C. | SO |
| D. | PH |
| Answer» D. PH | |
| 32. |
Bleaching action of SO2 is due to |
| A. | Oxidation |
| B. | Reduction |
| C. | Hydrolysis |
| D. | Electrolysis |
| Answer» C. Hydrolysis | |
| 33. |
SO2 is not a |
| A. | Basic oxide |
| B. | Bleaching agent |
| C. | Disinfectant |
| D. | Reducing agent |
| Answer» B. Bleaching agent | |
| 34. |
Which one is the formula of bleaching powder ? |
| A. | CaCI |
| B. | CaO |
| C. | CI |
| D. | CaOCI |
| E. | CA(OCI) |
| Answer» D. CaOCI | |
| 35. |
Bleaching powder is obtained by the interaction of CI2 and |
| A. | Dilute solution of Ca(OH) |
| B. | Dry CaO |
| C. | Conc. solution of Ca(OH) |
| D. | Dry slaked lime |
| Answer» E. | |
| 36. |
Which one of the following is the strongest base ? |
| A. | AsH |
| B. | SbH |
| C. | PH |
| D. | NH |
| Answer» E. | |
| 37. |
The following compound reacts with conc. H2SO4 to give CO2 gas |
| A. | Formic acid |
| B. | sugar |
| C. | Oxalic acid |
| D. | Ethanol |
| Answer» D. Ethanol | |
| 38. |
A colourless gas with smell of rotton fish is |
| A. | SO |
| B. | PH |
| C. | SO |
| D. | O |
| Answer» C. SO | |
| 39. |
The mixture of concentrated HCI and HNO3 made in 3 : 1 ratio contains |
| A. | N |
| B. | O |
| C. | NOCI |
| D. | NCI |
| E. | CIO |
| Answer» D. NCI | |
| 40. |
The correct acidic strength is |
| A. | HF |
| B. | HCI |
| C. | HBr,HCI |
| D. | HI |
| Answer» B. HCI | |
| 41. |
The Cp/Cv value of argon is |
| A. | 1.66 |
| B. | 1.55 |
| C. | 1.44 |
| D. | 1.33 |
| Answer» B. 1.55 | |
| 42. |
Which of the following is a pseudohalgen ? |
| A. | ICI |
| B. | ICI |
| C. | (CN) |
| D. | I |
| Answer» D. I | |
| 43. |
Which of the following is interhalogen ? |
| A. | IF |
| B. | I |
| C. | CN |
| D. | (CN) |
| Answer» B. I | |
| 44. |
A colourless gas with smell of rotten egg is |
| A. | SO |
| B. | SO |
| C. | H |
| D. | S |
| E. | None |
| Answer» D. S | |
| 45. |
The oxidation state of oxygen in O2F2 is |
| A. | +1 |
| B. | -2 |
| C. | +2 |
| D. | +4 |
| Answer» B. -2 | |
| 46. |
Bleaching action of SO2 is due to its |
| A. | Oxidizing action |
| B. | Reducing action |
| C. | Ability to hydrolyse |
| D. | Acidic nature |
| Answer» C. Ability to hydrolyse | |
| 47. |
Match the followingList-IList-III. Synthesis of ammonia(A)Haber processII. Purification of titanium(B)Van Arkel methodIII. Manufacture of caustic soda(C)Castner-kellner processIV. Purification of bauxite(D)Mona's process(E)Solvay's process(F)Hoop's processCodeA.I-A, II-B, III-C, IV-FB.I-B, II-C, III-E, IV-AC.I-C, II-F, III-D, IC-BD.I-A, II-B, III-F, IV-D |
| A. | A. |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» B. B. | |
| 48. |
Which is the following is known is ? |
| A. | NaOCI |
| B. | NaCI |
| C. | HCIO |
| D. | HCIO |
| Answer» B. NaCI | |
| 49. |
Which of the following does not have bleaching action ? |
| A. | CI |
| B. | (moist) |
| C. | CaOCI |
| D. | NaCIO |
| E. | Br |
| Answer» E. Br | |
| 50. |
The compound used as refrigerant is |
| A. | CF |
| B. | CCI |
| C. | CCI |
| D. | F |
| E. | COCI |
| Answer» D. F | |