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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 following
|
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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 | |