InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In contact process inpurities of arsenic is removed byA. `Al(OH)_3`B. Gelatious `Fe(OH)_3`C. `Cr(OH)_3`D. `Fe_2 O_3` |
| Answer» Correct Answer - B | |
| 2. |
The function of `Fe(OH)_3` in the contact process isA. To detect colloidal impurityB. To remove moistureC. To remove dust particlesD. To remove arsenic impurity |
| Answer» Correct Answer - D | |
| 3. |
Anomalous behaviour of oxygen is due toA. It is highly electronegativeB. Small atomic sizeC. Non-availability of d-orbitalsD. All |
| Answer» Correct Answer - D | |
| 4. |
Which one has the lowest boiling point ?A. `H_2 O`B. `H_2 S`C. `H_2 Se`D. `KNO_3` |
| Answer» Correct Answer - B | |
| 5. |
Which one has the highest and lowest boiling point ?A. `H_2 O, H_2 S`B. `H_2 O, H_2 Se`C. `H_2 S, H_2 O`D. `H_2 S, H_2 Se` |
| Answer» Correct Answer - A | |
| 6. |
Which one of the following has the highest bond energy ?A. `O-O`B. `S-S`C. `Se-Se`D. `Te-Te` |
| Answer» Correct Answer - B | |
| 7. |
In its compounds, oxygen can show oxidation state `(s)` ofA. `- 1`B. `- 2`C. `+ 1`D. `+ 2` |
| Answer» Correct Answer - A::B::D | |
| 8. |
Solid `SeO_3` (selenium trioxide) and `TeO_3` exist respectively asA. Cyclic trimerB. Cyclic tetramerC. Chain structureD. Three dimensional net work structure. |
| Answer» Correct Answer - B::D | |
| 9. |
Sulphuric acid is considered as the king of chemicals. The prosperity of any country is measured by the amount of sulphuric acid it consumes. Sulphuric acid is, thus, a substance of very great commercial importance as it used practically ine every important industry. This is due to the following properties of sulphuric acid : (a) acidic nature (b) oxidising nature (c) dehydrating nature (d) sulphonation. Sulphuric acid is used.A. In lead storage batteriesB. In making fertilizersC. In making explosivesD. All of these |
| Answer» Correct Answer - D | |
| 10. |
The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on the basis of oxygen content. (a) Normal oxides : These oxides which contain oxygen atom as permitted by the normal oxidation number, i.e., `-2` normal oxide may be acidic, basic, amphoteric or neutral. (b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of `-2`. (i) Peroxides : Two oxygen atoms are linked to each other and oxyegen has `-1` oxidation number. They contain `(O -O)^(2-)` unit. (ii) Superoxodes : These oxides contain `(O-O)^(-1)` unit, i.e., each O-atom has oxidation number `-1//2`. (c) Suboxides : These contain low content of oxygen than expected. (d) Mixed oxides : These oxides are made of two simpler oxides. Which of the following pairs contains neutral oxides ?A. `SO_2, SO_3`B. `N_2 O_3, N_2 O_5`C. `CO, NO`D. `Na_2 O, CaO` |
| Answer» Correct Answer - C | |
| 11. |
The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on the basis of oxygen content. (a) Normal oxides : These oxides which contain oxygen atom as permitted by the normal oxidation number, i.e., `-2` normal oxide may be acidic, basic, amphoteric or neutral. (b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of `-2`. (i) Peroxides : Two oxygen atoms are linked to each other and oxyegen has `-1` oxidation number. They contain `(O -O)^(2-)` unit. (ii) Superoxodes : These oxides contain `(O-O)^(-1)` unit, i.e., each O-atom has oxidation number `-1//2`. (c) Suboxides : These contain low content of oxygen than expected. (d) Mixed oxides : These oxides are made of two simpler oxides. Which pair of species is referred to as suboxides ?A. `CO, NO`B. `SO_2, CaO`C. `N_2 O, CO`D. `N_2 P, C_3 O_2` |
| Answer» Correct Answer - D | |
| 12. |
Sulphuric acid has great affinity for water because itA. Decomposes waterB. Forms hydrate with waterC. Hydrolyse the acidD. Decomposes the acid |
| Answer» Correct Answer - B | |
| 13. |
Sulphuric acid is considered as the king of chemicals. The prosperity of any country is measured by the amount of sulphuric acid it consumes. Sulphuric acid is, thus, a substance of very great commercial importance as it used practically ine every important industry. This is due to the following properties of sulphuric acid : (a) acidic nature (b) oxidising nature (c) dehydrating nature (d) sulphonation. The formation of nitroglycerine is done by the use of concentrated nitric acid and concentrated sulphuric acid. The process of conversion of glycerine into nitroglycerine is termed as.A. SulphonationB. OxidationC. NitrationD. Dehydration |
| Answer» Correct Answer - C | |
| 14. |
Sulphuric acid is considered as the king of chemicals. The prosperity of any country is measured by the amount of sulphuric acid it consumes. Sulphuric acid is, thus, a substance of very great commercial importance as it used practically ine every important industry. This is due to the following properties of sulphuric acid : (a) acidic nature (b) oxidising nature (c) dehydrating nature (d) sulphonation. Concentrated `H_2 SO_4` cannot be used to prepare `HBr` or `HI` from `KBr` or `KI` because it.A. Reacts too slowly with `KBr` or `KI`.B. Reducing `HBr` or `HI`C. Oxidising `HBr` or `HI`D. Oxidises `KBr` or `KBrO_3` or `KI` to `KIO_3` |
| Answer» Correct Answer - C | |
| 15. |
Which requires catalyst ?A. `S + O_2 rarr SO_2`B. `2 SO_2 + O_2 rarr 2 SO_3`C. `C + O_2 rarr CO_2`D. All of these |
| Answer» Correct Answer - B | |
| 16. |
In the upper layers of atmosphere, ozone is formed.A. By action of electric discharge on oxygen moleculesB. By action of ultraviolet rays on oxygen moleculesC. By action of infrared rays on oxygen moleculesD. Due to sudden drop of pressure. |
| Answer» Correct Answer - B | |
| 17. |
Which one of the following is an amphoteric oxide ?A. `MnO_2`B. `ZnO`C. CaOD. `CO_2` |
| Answer» Correct Answer - B | |
| 18. |
Select the correct statements aboyt `Na_2 S_2 O_3. 5H_2 O`.A. It is called as hypoB. It is used in photography to form complex with `AgBr`C. It can be used as antichlorD. It is used to remove stains of `I_2`. |
| Answer» Correct Answer - A::B::C::D | |
| 19. |
Oxygen was discovered by____. |
| Answer» Correct Answer - Scheele | |
| 20. |
Which of the following are amphoteric ?A. `BeO`B. `Al_2 O_3`C. `ZnO`D. `SO_2` |
| Answer» Correct Answer - A::B::C | |
| 21. |
Sulphur is `sp^2` hybridised inA. `SO_3`B. `SO_2`C. `CO_2`D. `CO` |
| Answer» Correct Answer - A::B | |
| 22. |
`Hg` loses its meniscus after reacting with ozone. |
| Answer» Correct Answer - T | |
| 23. |
All the elements of oxygen family areA. Non-metalsB. MetalloidsC. RadioactiveD. Polymorhic |
| Answer» Correct Answer - D | |
| 24. |
`SF_6` is unreactive towards water becauseA. Sulphur has very small sizeB. Fluorine is most electronegative elementC. Sulphur shows `+ 6` oxidation stateD. Due to steric hindrance, molecule cannot attack S-atom. |
| Answer» Correct Answer - D | |
| 25. |
Ozone is obtained by silent electric disacharge on oxygen. |
| Answer» Correct Answer - T | |
| 26. |
Ozone is used for purifying water becauseA. It dissociates and release oxygenB. It does not leave any foul smell like chlorineC. It kills bacteria, cyst, fungi and acts as a biocideD. All of the above |
| Answer» Correct Answer - D | |
| 27. |
Which reagent does not give oxygen as one of the products during oxidation with ozone ?A. `SO_2`B. `SnCl_1//HCl`C. `H_2 S`D. `PbS` |
| Answer» Correct Answer - A::B | |
| 28. |
Ozone is an _____of oxygen. |
| Answer» Correct Answer - Allotrope | |
| 29. |
Sulphur in `SF_6` undergoes ____ hybridisations. |
| Answer» Correct Answer - `sp^3 d^2` | |
| 30. |
Compound of sulphur used inn electrical transformer is ____. |
| Answer» Correct Answer - `SF_6` | |
| 31. |
Oxygen exhibit positive oxidation state with____. |
| Answer» Correct Answer - Fluorine | |
| 32. |
Six volumes of oxygen, on complete ozonisation form ____ volumes of ozone. |
| Answer» Correct Answer - Four | |
| 33. |
In the preparation of `O_2` from `KClO_3, MnO_3` act as a____. |
| Answer» Correct Answer - Catalyst | |
| 34. |
Allotrope of sulphur which is stable below `90^@ C` is ____. |
| Answer» Correct Answer - Orthorhombic | |
| 35. |
Mixture of `O_2` and `N_2 O` is used as ____. |
| Answer» Correct Answer - Anaesthetic | |
| 36. |
Hydrogen peroxide is an important compound of hydrogen and oxygen. It shows various types of properties and chemical reactions. The reaction `H_2 S + H_2 O_2 rarr S + 2 H_2 O` manifests.A. Acidic nature of `H_2 O_2`B. Alkaline nature of `H_2 O_2`C. Oxidising action of `H_2 O_2`D. Reducing nature of `H_2 O_2` |
| Answer» Correct Answer - A | |
| 37. |
Hydrogen peroxide is an important compound of hydrogen and oxygen. It shows various types of properties and chemical reactions. Hydrogen peroxide is notA. A reducing agentB. An oxidising agentC. A dehydrating agentD. A bleaching agent |
| Answer» Correct Answer - C | |
| 38. |
`SO_2` acts asA. Bleaching agentB. Oxidising agentC. Reducing agentD. Dehydrating agent |
| Answer» Correct Answer - A::B::C | |
| 39. |
Which one of the following is not true peroxide ?A. `PbO_2`B. `BaO_2`C. `Na_2 O_2`D. `H_2 O_2` |
| Answer» Correct Answer - A | |
| 40. |
Which of the following acts as pickling agent ?A. `HNO_3`B. `H_2 SO_4`C. `HCl`D. `HNO_2` |
| Answer» Correct Answer - B | |
| 41. |
Which of the following oxides exists as trigonal planar molecule in gaseous state and a cyclic trimer in the solid state ?A. `SO_2`B. `SeCO_2`C. `SeO_3`D. `SO_3` |
| Answer» Correct Answer - D | |
| 42. |
`SO_3` exists inA. 3 formsB. 2 formsC. 4 formsD. Only one |
| Answer» Correct Answer - A | |
| 43. |
`H_2 SO_3` and `H_2 SO_4` involve hybridisation of the typeA. Both `sp^3`B. Both `sp^3 d`C. `sp^3, sp^3 d`D. Both `dsp^2` |
| Answer» Correct Answer - A | |
| 44. |
`SO_2` and `So_3` involve hybridisation of the typeA. Both `sp^2`B. Both `sp^3`C. `sp^2, sp^3`D. `sp^3, sp^2` |
| Answer» Correct Answer - A | |
| 45. |
Vegetable colourung matter in presence of moisture is bleached by `SO_2` due to ___. |
| Answer» Correct Answer - Reduction | |
| 46. |
Acid used in lead storage battery is sulphuric acid. |
| Answer» Correct Answer - T | |
| 47. |
Addition of water to concentrated sulphuric acid is an ____reaction. |
| Answer» Correct Answer - Exothermic | |
| 48. |
Sulphuric acid is a dibasic acid in nature, hence it formsA. Acidic saltB. Acidic and basic saltC. Acidic and normal saltD. Double salt |
| Answer» Correct Answer - C | |
| 49. |
Sulphuric acid is a____acid . |
| Answer» Correct Answer - Dibasic | |
| 50. |
The only element in group `16` elements, which is definitely a metal is____. |
| Answer» Correct Answer - Polonium | |