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. |
Hydrogen molecule differs from chlorine molecule in the following respect `:`A. hydrogen molecule is non-polar but chloride molecule is polar.B. hydrogen molecule is polar while chlorine molecule is non-polar.C. hydrogen molecule can form intermolecular hydrogen bonds but chloride molecule does not.D. hydrogen molecule cannot participates in co-ordinate bond formation but chlorine molecule can. |
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Answer» Correct Answer - 4 Hydrogen does not has lone pair of electron so it can not form coordinate bond with other atoms or moleculs. |
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| 2. |
`H_(2)O_(2)` restores the colour of old lead paintings, blackened by the action of `H_(2)S` gas by :A. converting `PbO_(2)` to PbB. by oxidising PbS to `PbSO_(4)`C. converting `PbCO_(3)` to PbD. oxidising `PbSO_(3)` to `PbSO_(4)` |
| Answer» Correct Answer - B | |
| 3. |
Temporaty hardness of water is caused due to the presence ofA. `CaSO_(4)`B. `CaCl_(2)`C. `CaCO_(3)`D. `Ca(HCO_(3))_(2)` |
| Answer» Correct Answer - D | |
| 4. |
The smog is essentially caused by the presence of `:`A. `O_(2)` and `N_(2)`B. `O_(3)` and `N_(2)`C. Oxides of sulphur and nitrogenD. `O_(2)` and `O_(3)` |
| Answer» Correct Answer - 2 | |
| 5. |
`H_(2)O_(2)` is :A. an oxidising agentB. both oxidising and reducing agentC. reducing agentD. none of the above |
| Answer» Correct Answer - B | |
| 6. |
`H_(2)O_(2)` is always stored in black bottles becauseA. it is highly unstableB. its enthalpy of decomposition is highC. it undergoes auto-oxidation on prolonged standing in lightD. none of the above |
| Answer» Correct Answer - C | |
| 7. |
In acidic medium ,` H_(2)O_(2)` acts as a reducing agent in its reaction with `:`A. `FeSO_(4)`B. `KMnO_(4)`C. `K_(2)MnO_(4)`D. `K_(4)[Fe(CN)_(6)]` |
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Answer» Correct Answer - 2 `H_(2)O_(2)` acts as reducing agent and reduces `KMnO_(4)` solution in acidic medium. `2KMnO_(4)+6H^(+)+5H_(2)O_(2)rarr2K^(+)+2Mn^(2)+8H_(2)O+5O_(2)` |
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| 8. |
Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases `H_(2)O_(2)` acts as a reducing agent in acid medium ?A. `MnO_(4)^(-)`B. `SO_(3)^(2-)`C. `KI`D. `Cr_(2)O_(7)^(2-)` |
| Answer» Correct Answer - A,B | |
| 9. |
Ionic hydrides is/are usually :A. good electrical conductors when solidB. easily reducedC. good reducing agentsD. liquid at room temperature |
| Answer» Correct Answer - C | |
| 10. |
Ionic hydrides are formed by :A. transition metalsB. elements of very high electropositivityC. elements of very low electropositivityD. metalloids |
| Answer» Correct Answer - B | |
| 11. |
Ortho-hydrogen and para-hydrogen resembles in which of the following peroperty ?A. Thermal conductivityB. Magnetic propertiesC. Chemical propertiesD. Heat capacity |
| Answer» Correct Answer - C | |
| 12. |
Hydrogen is `:`A. electropositiveB. electronegativeC. both electropositive as well as electronegativeD. neither electropositive nor electronegative |
| Answer» Correct Answer - C | |
| 13. |
At high temperature, para hydrogen is :A. less stable than ortho hydrogenB. more stable than ortho hydrogenC. as stable as ortho hydrogenD. none of the above |
| Answer» Correct Answer - A | |
| 14. |
The most abundant isotope of hydrogen is :A. tritiumB. deuteriumC. protiumD. para hydrogen |
| Answer» Correct Answer - C | |
| 15. |
The sum of the number of neutrons and proton in the isotope of hydrogen isA. 3B. 4C. 5D. 6 |
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Answer» Correct Answer - A `._(1)^(3)H, ._(1)^(2)H, ._(1)^(1)H` Tritium `rArr 3` |
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| 16. |
Calgon (a water softener) is :A. `Na_(2)[Na_(4)(PO_(3))_(6)]`B. `Na[Na_(2)(PO_(3))]_(6)`C. `Na_(2)[Na_(4)(PO_(4))_(6)]`D. `Na_(4)[Na_(2)(PO_(4))_(6)]` |
| Answer» Correct Answer - A | |
| 17. |
Decomposition of `H_(2)O_(2)` is retarded by : `2H_(2)O_(2)(l) rarr 2H_(2)O(l)+O_(2)(g)`A. acetanilideB. `MnO_(2)`C. zincD. finely divided metals |
| Answer» Correct Answer - A | |
| 18. |
At absolute zero :A. only para hydrogen existsB. only ortho hydrogen existsC. both para and ortho hydrogen existD. none of the above |
| Answer» Correct Answer - A | |
| 19. |
The ratio of electron, proton and neutron in tritium is :A. `1:1:1`B. `1:1:2`C. `2:1:1`D. `1:2:1` |
| Answer» Correct Answer - B | |
| 20. |
Which of the following hydride is/are 'electron-precise' type ?A. HFB. `H_(2)O`C. `SiH_(4)`D. `PH_(3)` |
| Answer» Correct Answer - C | |
| 21. |
The adsorption of hydrogen by metals is called :A. dehydrogenationB. hydrogenationC. occlusionD. adsorption |
| Answer» Correct Answer - C | |
| 22. |
The correct order of stability of hydrides of alkali metals isA. `NaH gt LiH gt KH gt RbH gt CsH`B. `LiH gt NaH gt KH gt RbH gt CsH`C. `cSh gt RbH gt KH gt NaH gt LiH`D. `KH gt NaH gt LiH gt CsH gt RbH` |
| Answer» Correct Answer - 2 | |
| 23. |
The n/p ratio for `._(1)H^(1)` is :A. 1B. 2C. 3D. Zero |
| Answer» Correct Answer - D | |
| 24. |
Ordinary hydrogen at high temperature is a mixture of :A. 75% o-Hydrogen+25% p-HydrogenB. 25% o-Hydrogen+75% p-HydrogenC. 50% o-Hydrogen +50% p-HydrogenD. 1% o-Hydrogen+99% p-Hydrogen |
| Answer» Correct Answer - A | |
| 25. |
Which hydride is/are an ionic hydride ?A. `NH_(3)`B. `H_(2)S`C. `TiH_(1.73)`D. `NaH` |
| Answer» Correct Answer - D | |
| 26. |
Hydrogen peroxide is a:A. liquidB. gasC. solidD. semi-solid |
| Answer» Correct Answer - A | |
| 27. |
Which one of the following reactions represents water `-` gas shift reaction `?`A. `CO(g)+H_(2)O(g)underset("iron chormate")overset(673K)rarrCO_(2)+H_(2)`B. `C(s)+H_(2)O(g)overset(1270K)rarrCO(g)+H_(2)`C. `CH_(4)(g)+H_(2)O(g)underset(Ni)overset(1270K)rarrCO(g)+3H_(2)(g)`D. None of these |
| Answer» Correct Answer - 1 | |
| 28. |
Permutit is :A. hydrated sodium aluminium silicateB. sodium hexametaphosphateC. sodium silicateD. sodium meta-aluminate |
| Answer» Correct Answer - A | |
| 29. |
In lab `H_(2)O_(2)` is prepared byA. cod dilute `H_(2)SO_(4)` on hydrated `BaO_(2)`B. dil. HCl on `MnO_(2)`C. cold` H_(2)SO_(4)` on `MnO_(2)`D. aqueous alkali on `Na_(2)O_(2)` |
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Answer» Correct Answer - 1 `BaO_(2).8H_(2)O+H_(2)SO_(4)rarrBaSO_(4)+H_(2)O_(2)+8H_(2)O` |
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| 30. |
Hydrogen peroxide has a:A. linear structureB. pyramidal structureC. closed book type structureD. half open book type structure |
| Answer» Correct Answer - D | |
| 31. |
Pure de-mineralised water can be obtained by :A. `Na^(+)` cation exchanger and `Cl^(-)` anion exchangerB. `H^(+)` cation exchanger onlyC. `H^(+)` cation exchanger and `OH^(-)` anion exchangerD. `Na^(+)` cation exchanger only |
| Answer» Correct Answer - C | |
| 32. |
Which will produce hard water ?A. Saturation of water with `CaSO_(4)`B. Addition of `Na_(2)SO_(4)` of waterC. Saturation of water with `CaCO_(3)`D. Saturation of water with `MgCO_(3)` |
| Answer» Correct Answer - A | |
| 33. |
Very pure hydrogen `(99.9%)` can be made by which of the following processes ?A. Reaction of salt like hydrides with waterB. Reaction of methane with steamC. Mixing natural hydrocarbons of high molecular weightD. Electrolysis of water |
| Answer» Correct Answer - D | |
| 34. |
Which of the following statements is most applicable to hydrogen ?A. It can act as a reducing agent onlyB. It can act as an oxidising agent onlyC. It can act as both as oxidising and reducing agentsD. It can act neither as an oxidising nor as a reducing agent. |
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Answer» Correct Answer - 3 Hydrogen can act both as oxidising and reducing agent. It acts as oxidising agnet when reacts with metal and form emtal hydrides which are elctrovalent compounds. `2Na+H_(2)rarr2Na^(+)H^(c-)` `Ca+H_(2)rarrCaH_(2)` Hydrogen also acts as reducing agent when its reacts with oxides `PbO+H_(2)rarrPb+H_(2)O` `CuO+H_(2)rarrCu+H_(2)O` `Fe_(3)O_(4)+H_(2)rarr3Fe+4H_(2)O` |
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| 35. |
The normality of 30 volume `H_(2)O_(2)` solution is `:`A. `3.57`B. `7.53`C. `5.36`D. `5.73` |
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Answer» Correct Answer - 3 `30" vol"=3.05xx3=9.105%H_(2)O_(2)` `100ml` sol contain `9.105` gms `H_(2)O_(2)` Hence 1000ml solution contain `91.05` gms `H_(2)O_(2)` Strength of `H_(2)O_(2)=91.05 ` gms`//` lit, basicity of `H_(2)O_(2)=2` Equivalent wt. of `H_(2)O_(2)=((34)/(2))=17` Normality `=("Strenth")/("Eq. wt")=(91.05)/(17)=5.3558` `=5.36 " "Ans.` |
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| 36. |
One of the following is an incorrect statement. Point out the incorrect one.A. `H_(2)O_(2)`decomposes rapidely in presence of `MnO_(2)`B. Ice at its melting point is lighter than water because ice crystals have hollow hexagonal arrangement of `H_(2)O` molecules.C. `D_(2)O` will have maximum density at `11.5^(@)C`.D. Water gas contains greater proportion of CO than that of `H_(2)` |
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Answer» Correct Answer - 4 `H_(2)=50" volumes, "CO=40" volume",N_(2)" and " CO_(2)=5`volumes etc. |
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| 37. |
Depletion of ozone layer causesA. blood cancerB. lung cancerC. sking cancerD. bronchitis |
| Answer» Correct Answer - 3 | |
| 38. |
Find out the number of following orders which are correct against the mentioned properties: (a) `H_(2) lt D_(2) lt T_(2) " " ("Number of protons")` (b) `H_(2) lt D_(2) " " ("Bonding energy")` (c) `H_(2) lt D_(2) lt T_(2) " " ("Boiling point")` (d) `H_(2) lt D_(2) lt T_(2) " " ("Number of neutrons")` |
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Answer» Correct Answer - `0003` (a) No. of protons are equal in `H_(2), D_(2), T_(2)` |
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| 39. |
Total number of reagents which do not oxidize water into oxygen: `H_(2)O_(2), F_(2), FeCl_(3), I_(2), K_(2)Cr_(2)O_(7)` |
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Answer» Correct Answer - `0004` Only `F_(2)` oxidises `H_(2)O` into `O_(2)`. |
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| 40. |
Which of the following order are correct ? `{:((a)TiH_(2) lt BeH_(2) lt CaH_(2)-"Electrical conductance ",(b)LiH lt NaH lt CaH-"Ionic character",,,),((c)F-F- lt H-H lt D-D-"Bond dissociation enthalpy",(d)H_(2)O lt MgH_(2)lt NaH-"Reducing character",,,):}`A. `(a),(b)` and `(c)`B. `(b),(c )` and `(d)`C. `(a),(c )` and `(d)`D. `(a),(b),(c )` and `(d)` |
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Answer» Correct Answer - 2 `(1)BeH_(2) lt CaH_(2) lt TiH_(2)` |
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| 41. |
Find out the number of following orders which are not correct against the mentioned properties: `{:((a) " "CaH_(2) lt BeH_(2),("Electircal conductance in molten condition")),((b) " "LiH lt NaH lt CsH,("Ionic character")),((c) " "H_(2) lt D_(2) lt F_(2),("Bond dissociation enthalpy")),((d)" " NaH lt MgH_(2) lt H_(2)O,("Reducing property")):}` |
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Answer» Correct Answer - `0003` (a), (c), (d) are incorrect. |
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| 42. |
Heavy water is manufactured by `:`A. combination of hydrogen and heavier isotope of oxygen.B. electrolysis of water containing heavy hydrogen dissolved in it.C. repeated electrolysis of `3%` aqueous solution of `NaOH`.D. none of the above. |
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Answer» Correct Answer - 3 Repeat also electrolysis of `3%` aqueous solution of `NaOH`. |
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| 43. |
Heavy water is used in atomic reactor asA. coolantB. moderatorC. both coolant and moderatorD. neither coolant nor moderator |
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Answer» Correct Answer - 3 Heavy water is used as a coolant and moderater. |
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