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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Liquid phase nitration of alkanegives |
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Answer» mononitroalkane |
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| 3. |
Liquid oxygen is: |
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Answer» Colourless |
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| 4. |
Liquid oxygen: |
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Answer» Is an IMPORTANT constituent of ROCKET fuels |
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| 6. |
Liquid metal among d-block elements is |
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Answer» Hg |
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| 7. |
Liquidhydrocarbons isconvertedintoa mixtureof gaseoushydrocarbon by : |
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Answer» cracking |
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| 8. |
Liquid helium is called super fluid. Why? |
| Answer» Solution : At 4.2K, helium BECOMES LIQUID and is called He (I). On further COOLING to 2.2K, He (II) is formed. Because of its low viscosity, it has fluid properties like a gas. | |
| 9. |
Liquid dishwashing detergents contain |
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Answer» non-ionic detergents |
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| 10. |
Liquid crystals are best used in : |
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Answer» COLOUR TV |
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| 11. |
Liquid benzene burns in oxygen according to : 2C_6H_6 + 150_2rarr 12CO_2(g) + 6H_2O(g) .How many litre of O_2 at STP are needed to complete the combustion of 39 g of liquid benzene: |
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Answer» 11.2 litre |
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| 12. |
Liquid ammonia is used in refrigerators because: |
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Answer» it has a HIGH DIPOLE moment |
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| 13. |
Liquid and solid halogens are |
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Answer» `Br_(2)andCl_(2)` |
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| 14. |
Liquidammonia is usedas a refrigerant - why ? |
| Answer» Solution :Latent heatof VAPORISATION of liquid `NH_(3)`is very high. | |
| 15. |
Liquid Ammonia is simalar to H_(2)Oas a solvent . Ammonia can from the following ions is liquid state by ionisation |
| Answer» Solution :`NH_(3" (liquid)") + NH_(3 "(liquid)") rarr[NH_(4)^(+)][NH_2^(-)]` | |
| 16. |
Liquid A and B from ideal solution over the entire range of composition. At temperature T, equimolar binary solution of liquids A and B vapour pressure 45 Torr. At the same temperature, a new solution of A and B having mole fractions x_(A) and x_(B), respectively, has vapour pressure of 22.5 Torr. The value of X_(A)//x_(B) in the new solution is _________ (Given that the vapour pressure of pure liquid A is 20 Torr at temperature T) |
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Answer» `P_(A)^(@)+P_(B)^(@)=90`…..(1) GIVEN `P_(A)^(@)=200` torr `P_(B)^(@)=70` torr `rArr 22.5` torr `=20 x_(A)+70(1-x_(A))` `=70-50x_(A)` `x_(A)=((70-22.5)/(50))=0.95` `x_(B)=0.05` So `(x_(A))/(x_(B))=(0.95)/(0.05)=19` . |
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| 17. |
Liquid A and B on mixing produce a warm solution. Which type of deviation does this solution show ? |
| Answer» SOLUTION :`-`ve DEVIATION | |
| 18. |
Liquid ammonia ionises to a slight extent. At -50^@C its self ionisation constant K_(NH_3)=[NH_4^+][NH_2^-]=10^(-30) How many amide ions are present per cm^3 of pure liquid ammonia . (Assume N= 6.0xx10^(23))? |
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Answer» `6XX10^6` IONS |
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| 19. |
Liquid ammonia bottles be opened after cooling them in ice for sometime. It is because liquid NH_3: |
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Answer» brings tears to the eyes |
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| 20. |
Liquid A and B from an ideal solution. If vapour pressure of pure A and B are 500 Nm^(-2) and 200 Nm^(-2) respectively , the vapour pressure of a solution of A in B containint 0.2 mole fraction of A would be |
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Answer» `700 N m^(-2)` `P_(B)=X_(B)P_(B)^(o)=0.8 xx 200 = 160 N m^(-2)` Total V.P. of the solution =`100+160=260Nm^(-2)` |
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| 21. |
Liquefied petroleum gas (LPG) is used as a household fuel. During liquefication of a gas, its entropy : |
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Answer» DECREASES |
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| 22. |
Lipids serves |
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Answer» biocatalyst |
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| 24. |
Lipids being soluble in organic solvents and insoluble in water include the class : |
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Answer» TRIHYDRIC alcohols |
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| 25. |
Lipids are define on the basis of _________ which is used in their isolation. |
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Answer» CHEMICAL property |
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| 26. |
Lipids are classified as |
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Answer» COMPLEX lipids and SIMPLE lipids |
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| 27. |
Lipids are |
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Answer» AMINO ACIDS |
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| 28. |
Lipids are : |
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Answer» Long chain FATTY acid esters |
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| 29. |
Lipids act as _____in fat metabolism. |
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Answer» emulsifier |
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| 30. |
Lipids and proteins are collectively known as _____. |
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Answer» |
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| 31. |
Lipids act as ………………….in factmetabolism . |
| Answer» SOLUTION :EMULSIFIER | |
| 32. |
LiOH reacts with CO_(2) to form Li_(2)CO_(3) (atomic mass of Li=7) the amount of CO_(2) (in g) consumed by 1g of LiOH is closet to |
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Answer» 0.916 `"no of MOLES of" CO_(2)=1/48` `"MASS of "CO_(2)=1/48xx 44= 0.916g` |
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| 33. |
Lipases are enzymes that hydrolyse : |
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Answer» CARBOHYDRATES |
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| 34. |
Linkage isomerism arises in· a coordination compound containing _____ ligand. |
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Answer» |
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| 36. |
Linkage isomerismmay be observed in |
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Answer» `Co (NH_(3))_(6)^(3+)` |
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| 37. |
Linkage isomerism. |
| Answer» Solution :The phenomenon of isomerism in which the coordination compounds have the same metal atom or ion and same LIGAND but BONDED through different ATOMS or linkages is known as LINKAGE isomerism. | |
| 38. |
Linear structure is assumed by: (I) NCO(II)CS_(2)(III)overset(+)(N)O_(2)(IV)Solid BeH_(2) |
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Answer» all four |
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| 39. |
Linear polymer of phenol formaldehyde is called ………………… . |
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Answer» NOVOLAC |
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| 40. |
Linear sequence of polypeptide bond refer in |
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Answer» SECONDARY structure |
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| 41. |
Linear polymer of phenol formal dehyde is called ... |
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Answer» NOVOLAC |
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| 42. |
Linear polymer among the following is |
| Answer» Answer :D | |
| 44. |
Limiting radius ratio ((r_(+))/(r_(-))) for co-ordination number six (octahedral arrangement ) is |
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Answer» 0.155-0.225 |
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| 45. |
Limiting molar conductivity of NH_(4)OH(i.e.^^_(m)^(@)(NH_(4)OH)is equal to: |
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Answer» `^^_(m(NH_(4)Cl))^(@)+^^_(m(NaCl))^(@)-^^_(m(NAOH))^(@)` `^^_(m(NaOH))^(@)=^^_(mNa^(+))^(@)+^^_(m_(OH^(-)))^(@)` `^^_(m(NaCl))^(@)=^^_(m_(Na^(+)))^(@)+^^_(m_(Cl^(-)))^(@)` `THEREFORE ^^_(m(NH_(4)^(+)))^(@)+^^_(m(OH^(-)))^(@)` `=^^_(m(NH_(4)^(+)))^(@)+^^_(m(Cl^(-)))^(@) + ^^_(m(Na^(+)))^(@)` `+^^_(m(OH^(-)))^(@)[^^_(m(Cl))^(@)+^^_(m(Cl^(-)))]` `^^_(m(NH_(4)OH))^(@) =^^_(m(NH_(4)Cl))^(@)+^^_(m(NaOH))-^^_(m(NaCl))^(@)` |
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| 46. |
Limiting molar conductivity of an electrolyte can be represented as the sum of the individual contributions of anions and cations. This law was given by |
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Answer» FARADAY |
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| 47. |
Limiting molar conductivity of NH_(4)OH (i.e., overset(0)(wedge)_(m(NH_(4)OH))) is equal to |
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Answer» `overset(0)(wedge)_(m(NH_(4)CL))+overset(0)(wedge)_(m(NaCl))-overset(0)(wedge)_(m(NAOH))` |
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| 48. |
Limiting molar conductivity for some ions is given below (in S cm^(2) mol^(-1) ) : Na^+ -50.1 , Cl^(-) - 76.3 , H^(+) - 349.6 , CH_3COO^(-) -40.9 , Ca^(2+) -119.0 What will be the limiting molar conductivities (Lambda_m^@) of CaCl_2, CH_3COONaand NaCl respectively ? |
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Answer» 97.65 , 111.0 and 242.8 S `"cm"^(2) "MOL"^(-1)` =119.0 + 2 x 76.3 = 271.6 S `cm^2 mol^(-1)` `Lambda_(m " " CH_3COONa)^@=Lambda_(CH_3COO^-)^@+lambda_(NA^+)^@` =40.9+50.1=91 S `cm^2 mol^(-1)` `Lambda_(m " " NACL)^@=lambda_(Na^+)^@ + lambda_(Cl^-)^@` = 50.1 + 76.3 = 126.4 S `cm^2 mol^(-1)` |
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| 49. |
limiting compositions of f - block hydrides are |
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Answer» `(H_(2)O+O_(2)) and H_(2)O` `[Fe(CN)_(6)]^(3-)+(1)/(2)H_(2)O_(2)+OH^(-)rarr[Fe(CN)_(6)]^(4-)+H_(2)O+(1)/(2)O_(2)` |
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| 50. |
Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters is |
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Answer» lt3.0 ppm |
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