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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. |
Strength of the sample of `H_(2)O_(2)` is generally expressed in terms of volume strength . It means the volume of oxygen liberated at NTP by heating one volume of `H_(2)O_(2)` . The concentration of `H_(2)O_(2)` in a solution can also expressed as percentage of `H_(2)O_(2)` in solution . Normality of this solution can be calculated if the equivalent mass of `H_(2) O_(2)` is known . 25 mL of `H_(2)O_(2)` solution was added to the excess of acidified KI solution . The iodine so liberated required 40 mL of `0.1 N Na_(2)S_(2)O_(3)` solution . what is normality of `H_(2)O_(2)` solution ?A. `0.08`B. `0.02`C. `0.16`D. `0.20` |
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Answer» Correct Answer - C |
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| 2. |
Strength of the sample of `H_(2)O_(2)` is generally expressed in terms of volume strength . It means the volume of oxygen liberated at NTP by heating one volume of `H_(2)O_(2)` . The concentration of `H_(2)O_(2)` in a solution can also expressed as percentage of `H_(2)O_(2)` in solution . Normality of this solution can be calculated if the equivalent mass of `H_(2) O_(2)` is known . Percentage strength of the above `H_(2)O_(2)` solution isA. `0.126`B. `0.272`C. `0.544`D. `0.136` |
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Answer» Correct Answer - B |
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| 3. |
Strength of the sample of `H_(2)O_(2)` is generally expressed in terms of volume strength . It means the volume of oxygen liberated at NTP by heating one volume of `H_(2)O_(2)` . The concentration of `H_(2)O_(2)` in a solution can also expressed as percentage of `H_(2)O_(2)` in solution . Normality of this solution can be calculated if the equivalent mass of `H_(2) O_(2)` is known . Volume strength of above `H_(2)O_(2)` solution is ?A. `0.448`B. `0.632`C. `0.896`D. `0.556` |
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Answer» Correct Answer - C |
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| 4. |
What is the molarity of `H_2O_2` of the `11.2V` (volume strength)? |
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Answer» Correct Answer - 1 |
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| 5. |
What is the molarity of `H_(2)O_(2)` of the 11.2 V (volume strength) ? |
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Answer» Correct Answer - 1 |
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| 6. |
The volume of perhydrol which on decomposition gives 1.5 Iit of `O_(2)` gas at STP isA. 25mlB. 15mlC. 10mlD. 0ml |
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Answer» Correct Answer - B |
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| 7. |
Perhydrol isA. `10%(w//v)H_(2)O_(2)`B. `30%(w//v)` of `H_(2)O_(2)`C. `3%(w//v)H_(2)O_(2)`D. `100%(w//v)H_(2)O_(2)` |
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Answer» Correct Answer - B |
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| 8. |
The volume of perhydrol which on decompostion gives 1L of `O_(@)` at STP isA. 10mLB. 1mLC. 100mLD. 10L |
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Answer» Correct Answer - A |
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| 9. |
The lead of the lead paintings becomes black due to formation of……… `H_(2)O_(2)` converts the black colour to white lead is…..A. `H_(2)S,PbSO_(4)`B. `PbS,PbSO_(4)`C. `PbSO_(4),PbS`D. `PbS,H_(2)S` |
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Answer» Correct Answer - B |
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| 10. |
Molarity and volume strength of perhydrol respectivelyA. 100M and 8.9 VB. 8.9 M and 100VC. 8.9M and 30VD. 30M and 8.9 V |
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Answer» Correct Answer - B |
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| 11. |
Which of the following is`//`are matched properly ?A. `H_(2)O_(2)+2OH^(-)to2H_(2)O+O_(2)+2e^(-)` …….. Reducing property in alkaline mediumB. `H_(2)O_(2)to2H^(+)+O_(2)+2e^(-)`……. Property in acidic mediumC. `H_(2)O_(2)+2H^(+)+2e^(-)to2H_(2)O`……oxidising property in acidic mediumD. `H_(2)O_(2)toH_(2)O+O`….. Potential equation in alkaline medium |
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Answer» Correct Answer - A::B::C::D |
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| 12. |
Which of the following does not give hydrogen peroxide on hydrolysis ?A. `H_(2)S_(2)O_(3)`B. `H_(2)SO_(5)`C. `H_(2)S_(2)O_(7)`D. `H_(2)S_(4)O_(6)` |
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Answer» Correct Answer - A::C::D |
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| 13. |
The electron deficient compound isA. `NH_(3) `B. `PH_(2)`C. `B_(2)H_(6)`D. `C_( 2)H_(6)` |
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Answer» Correct Answer - C |
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| 14. |
Which of the following water smple has maxiumum degree of hardness?A. `9.5g "of" MgCl_(2)"in"10^(5)kg" of water "`B. `11.1 g "of"CaCl_(2)"in"10^(5)kg"os water "`C. `6.8 "of"CaSO_(4)"in"10^(4)kg "of water"`D. `1.2 g "of" MgSO_(4)"in"10^(4)"of water"` |
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Answer» Correct Answer - C |
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| 15. |
Which of the following statements is`//`are correct about `6.8%` stregnth of `H_2O_2`.A. Its normality I s4NB. Its molarity is 2MC. Its volume strength is 22.4VD. Volum strenght =`11.2xx"Molarity"` |
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Answer» Correct Answer - ABCD |
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| 16. |
Which of the foollowing is /are basic huydroide ?A. HClB. `NH_(3)`C. `H_(2)S`D. `PH_(3)` |
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Answer» Correct Answer - B,D |
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| 17. |
Which of the following statements is`//`are correct about `6.8%` stregnth of `H_2O_2`.A. Its normality is 4NB. Its molarity is 2MC. Its volume stremght is 22.4VD. Volume strength =`11.2xxM` |
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Answer» Correct Answer - A,B,C,D |
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| 18. |
Which of the following statements about the following reaction is`//`are not correct? `Cr_(2)O_(7)^(2-)+3H_(2)O_(2)+8H^(o+)to2Cr^(3+)+7H_(2)O+3O_(2)`A. `H_(2)O_(2)`is oxidised to `O_(2)`B. `H_(2)O_(2)`is reduced to `H_(2)O`C. the oxidation number if chrominum atom changes by 3D. Hydrogen ions aarae oxidised to `H_(2)O` |
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Answer» Correct Answer - B,D |
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| 19. |
Hydrogen peroxide is a powerful oxidising agent. It is an electron acceptor in acidic and alkaline mediums . `H_(2)O_(2) + 2H^(+) + 2e^(-) rarr H_(2)O` (in acidic medium ) `H_(2)O_(2) + 2e^(-) rarr 2OH^(-)` (in alkaline medium) It can also act as reducing agent towards powerful oxidising agents . `H_(2)O_(2) rarr 2H^(+) + O_(2) + 2e` In alkaline medium , however , its reducing nature is more effective . `H_(2)O_(2) + 2OH^(-) rarr 2H_(2)O + O_(2) + 2e^(-)` In which of the following reactions , `H_(2)O_(2)` acts as an oxidising agent ?A. `IO_(4)^(-) + H_(2)O_(2) rarr IO_(3)^(-) + H_(2)O + O_(2)`B. `2I^(-) + H_(2)O_(2) + 2H^(+) rarr I_(2) + 2H_(2)O`C. `Ag_(2)O + H_(2)O_(2) rarr 2Ag + H_(2)O + O_(2)`D. `2MnO_(4)^(-) + 6H^(+) + 5H_(2)O_(2) rarr 2Mn^(2+) + 8H_(2)O + 5O_(2)` |
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Answer» Correct Answer - B |
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| 20. |
Bleaching action of `H_(2)O_(2)` is due to its :A. `PbS+4H_(2)O_(2)rarrPbSO_(4)+4H_(2)O`B. `H_(2)O_(2)rarrH_(2)O+(O)`C. `H_(2)O_(2)+(O)rarrH_(2)O+O_(2)`D. `H_(2)O_(2)+O_(3)rarrH_(2)O+2O_(2)` |
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Answer» Correct Answer - B |
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| 21. |
Bleaching action of `H_(2)O_(2)` is due to its :A. OxidationB. ReductionC. Acidic behaviourD. Basic nature |
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Answer» Correct Answer - A |
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| 22. |
How does `H_(2)O_(2)` differ from `O_(3)` in its chemical action?A. In oxidising PbS to `PbSO_(4)`B. In liberating `I_(2)` from KIC. In reducing acidified `KMnO_(4)`D. In oxidising `K_(4)[Fe(CN)_(6)]` |
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Answer» Correct Answer - C |
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| 23. |
Hydrogen peroxide has a:A. Linear struchureB. Closed chain structureC. Closed book structureD. Open book structure |
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Answer» Correct Answer - D |
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| 24. |
Same reasons are given reagarding the limited use of `H_(2)` as fuel (I) Its calorific value is low (II) It availability in free state is less (III) It is difficult to store (IV) Its transportation is easy The correct statement areA. I,II and IIIB. II,III and IVC. All are correctD. II and III |
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Answer» Correct Answer - D |
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| 25. |
Polyphosphates are used as water softening agents because theyA. form solute complexes anionic speciesB. precipitate anionic speciesC. form soluble complexes with cationic speciesD. precipitate cationic species |
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Answer» Correct Answer - C |
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| 26. |
Ionic hydrides are usuallyA. `NaH `B. `CaH_(2) `C. `LiH`D. `BaH_(2)` |
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Answer» Correct Answer - C |
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| 27. |
Synthetic petrol is prepared by using a mixture.A. Coal gas + `H_(2)`gasB. Water gas + `H_(2)` gasC. Semi water gas D. Carburatted water gas |
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Answer» Correct Answer - B |
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| 28. |
Synthetic petrol is prepared by using a mixture.A. Coal gas + `H_(2)`gasB. Water gas + `H_(2)` gasC. Semi water gasD. Carburatted water gas |
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Answer» Correct Answer - B |
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| 29. |
The metal that cannot displace hydrogen from dil. HCl isA. AlB. FeC. CuD. Zn |
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Answer» Correct Answer - D |
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| 30. |
Atomic hydrogen is allowed to combine on the surface to be welded to generate the temperature ofA. 400KB. 3000KC. 4600KD. 4000K |
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Answer» Correct Answer - D |
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| 31. |
The conversion of atomic hydrogen into ordinary hydrogen isA. Exothermic changeB. Endothermic changeC. Nuclear changeD. Photochemical change |
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Answer» Correct Answer - B |
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| 32. |
During hydrogenation of oils the catalyst commonly used isA. Pd on CuCl_(2)B. FeC. NiD. `U_(2)O_(5)` |
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Answer» Correct Answer - C |
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| 33. |
Which of the following reactions requires high temperature and catalyst ?A. `H_(2)+F_(2)rarr2HF`B. `H_(2)+Cl_(2)rarr2HCl`C. `H_(2)+Br_(2)rarr2HBr`D. `H_(2)+I_(2)rarr2HI` |
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Answer» Correct Answer - D |
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| 34. |
Law of constant composition doesnot hold good forA. Saline hydridesB. Interstitial HydridesC. Covalent HydridesD. Molecular Hydrides |
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Answer» Correct Answer - B |
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| 35. |
The permanent hardness of water is due to the presence ofA. Sulphates and Chlorides of Ca and MgB. Carbonates of Ca and MgC. Bicarbonates of Ca and MgD. Phosphates of Ca and Mg |
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Answer» Correct Answer - A |
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| 36. |
`CO+H_(2)underset(Cu)overset(ZnO)rarr` product. Identify the product formed in the given reaction.A. `CH_(3)COOH`B. `CO_(2)`C. `C_(3)O_(2)`D. `CH_(3)OH` |
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Answer» Correct Answer - D |
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| 37. |
`Zn` gives `H_(2)` gas with `H_(2)SO_(4)` and `HCl` but not with `HNO_(3)` becauseA. Zn acts as an oxidising agent when react with `HNO_(3)`B. `HNO_(3)` is weaker acid than `H_(2)SO_(4)` and `HCl`C. In electrochemical series Zn is above hydrogenD. `NO_(3)^(-)` is reduced in preference to hydronium ion |
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Answer» Correct Answer - D |
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| 38. |
Triple point of water isA. `273.16K`B. `373.15K`C. `203.12K`D. `193.16K` |
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Answer» Correct Answer - A |
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| 39. |
Incorrect statement (s) regarding `H_(2)O_(2)` is s/areA. `H_(2)O_(2)`has higher boiling point than waterB. AS physical state of `H_(2)O_(2)` chsanges the bond angles and dihesdreal angles chagesC. `H_(2)O_(2) ` acts as a reading agent during its bleaching actionD. `H_(2)O_(3)`is manufactured by eleectrolysis of hot dilute aq solution of `H_(2)SO_(4)` |
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Answer» Correct Answer - CD |
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| 40. |
Which of the following statement is`//`are correct regarding `H_(2)O_(2)` ?A. It oxiides Fe(II) to Fe(III) in acidic mediumB. It is obtained by electrolysis of dilute `H_(2)SO_(4)`C. It reduces Mn(VII) to Mn(II)D. It is a weak base |
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Answer» Correct Answer - D |
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| 41. |
The correct statement regarding structure of ice :A. Ice has a highly ordered three dimensional hydrogen bonded structure.B. Each oxygen atom in ice is surrounded tetrahedrally by four other oxygen atoms at a distance of 276 pm.C. Hydrogen bonding gives ice a rather open structure with wide holes. These holes can hold some other molecules of appropriate size interstitially.D. All are correct. |
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Answer» Correct Answer - D |
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| 42. |
The correct statements among (a) to (d ) regarding `H_(2)` as a fuel are : (a) It Produces less pollutants than petrol. ( b) A cylinder if compressed dihydrogen weight `~ 30 `times more than a petrol tank producing the same amount ( c ) Dihydrogen is stored in tanks of metal alloys like `NaNi_(5)` ( D) On combusion ,values of energy released per gram of liqiud dihydrogen and LPG are 50 and 142 kJ respectivelyA. `NaNi_(5)`B. `Ti-TiH_(2)`C. `Mg-MgH_(2)`D. All |
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Answer» Correct Answer - D |
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| 43. |
Heavy water isA. `H_(2)O^(18)`B. water obtained by repeated distillationC. `D_(2)O`D. water at `4^(@)C` |
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Answer» Correct Answer - C |
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| 44. |
What is the conc. Of `H_(2)O_(2)` obtained by auto oxidation process?A. `50%`B. `1%`C. `30%`D. `85%` |
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Answer» Correct Answer - B |
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| 45. |
In the preparation of `H_(2)O_(2)` by auto oxidation method the starting substanace isA. 2-ethyl anthra quinoneB. 2-ethyl anthra quinolC. p-benzo quinoneD. N-methyl anilne |
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Answer» Correct Answer - B |
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| 46. |
which one of the following on oxidation gives `H_(2)O_(2)`?A. 2-EthylanthraquinolB. 3-ethyanthraaqunioneC. anthracence or phenontheeneD. 4-ehtylanthracenae |
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Answer» Correct Answer - A |
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| 47. |
`34 g` of `H_(2)O_(2)` is present in `1120 ml` of `H_(2)O` solution. This solution is called.A. 10V solutionB. 20V solutionC. 34V solutionD. 32 V solution |
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Answer» Correct Answer - A |
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| 48. |
10 volume `H_(2)O_(2)` means _________.A. `1ml H_(2)O_(2)"gives "10 mL O_(2) at NTP`B. `1 g H_(2)O_(@) gives 10mL O_(2)at NTP`C. 1 mol `H_(2)`gives 10mL `O_(2)` at NTPD. `10mL H_(2)O_(2)`gives 1 Mol `O_(2)` at NTP |
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Answer» Correct Answer - A |
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| 49. |
Exhausted cation exchange resin is regenerated by using solution of moderately concentrated.A. `NaOH`B. `Na_(2)CO_(3)`C. `H_(2)SO_(4)`D. Both 1& 2 |
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Answer» Correct Answer - D |
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| 50. |
Which is`//`are true statements?A. The layer of ice on the surface of river in the winter acts as a thermal insulator between the water below and the air aboveB. The fish and other marine orgnims are enabled to survive long periods of freezing weather due to the fact that ice is lighter than waterC. When ice is formed volume decreasesD. Density of ice is maximum at `0^(@)`C |
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Answer» Correct Answer - A::B |
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