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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.
| 2. |
Monds process is used for refining of Ni and Van Arkel method is used for refining Zr (Zirconium). Write one similarity between these processes. |
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Answer» |
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| 3. |
Mond's process is used for : |
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Answer» Ni |
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| 4. |
Monds process can be used for the refining of |
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Answer» iron |
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| 5. |
Mond's process is carried out for the purification of |
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Answer» Ni |
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| 7. |
Explain Mond’s process used for refining of nickel. |
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Answer» |
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| 8. |
Mond process is used in the extraction of : |
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Answer» Co |
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| 9. |
Molybdenum ( molar mass 96 gcrystallizes as bcc crystal . If density of crystal is 10.3 g / cm^3 , then radius of Mo atom is (N_A = 6 X 10^23) ( Take root(3)(31) = 3.2 ) |
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Answer» `111` PM |
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| 11. |
Molten sodium is used in nuclear reactors to |
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Answer» Absorb NEUTRONS in ORDER to control the CHAIN reaction |
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| 12. |
Molten sodium chloride conducts electricity due to the presence of electrons. Is it true or false? |
| Answer» SOLUTION :FREE IONS | |
| 13. |
Molten sodium chloride conducts electricity due to the presence of _______. |
| Answer» SOLUTION :FREE IONS | |
| 14. |
Molten sodium chloride conducts electricity due to the presence of "………………." |
| Answer» SOLUTION :FREE IONS | |
| 15. |
Molten NaOH conducts electricity , becauseNaOH is : |
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Answer» A non-electrolyte |
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| 16. |
Molten NaCl conducts electricity due to the presence of : |
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Answer» FREE electrons |
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| 17. |
Molten NaCl conducts electricity due to the presence of: |
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Answer» FREE electrons |
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| 18. |
Molten CuCl_2, is electrolysed using platinum electrode. The reaction occuring at anode is |
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Answer» `2Cl^(-) rarr Cl_(2(G)) +2e^(-)` |
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| 19. |
Molten (ICl_(3))overset("Ionisation")(rarr) x+y,x&y on electrolysis give |
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Answer» `Cl_(2)` at cathode & `I_(2)` at anode |
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| 20. |
Molten aluminim chloride is electrolysed with a current of 0.5 ampere to produce 27.0 g of aluminium. (a) How many gram equivalents of aluminium were producted ? (b) How long did the electrolysis take place ? (c ) How many litres of chlorine were evolved at S.T.P. ? |
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Answer» `AlCl_(3)hArrAl^(3+)(l)+3Cl^(-)(l)` `Al^(3+)(l)+3e^(-) to Al(s) , 3Cl^(-)(l) to 3//2 Cl_(2)(G)+3e^(-)` (a) Gram equivalent of aluminium deposited `=("Mass of Al deposited")/("Equivalent mass of" Al)=(27g)/((9equiv^(1)))=3 g equiv^(-1)`. (b) TIME for which electrolysis was carried : `Al^(3+)(l)+underset((3 Faraday))3e^(-) to underset((27 g))Al(s)` Let the current be passed for time =t sec. `:.""` Quantity of charge (Q) passed`=(0.5 amp)xxt(s)=0.5xxt(C)` Actual amout of charge passed`=3F=3xx96500" C"` `:.` Time (t) for which electrolysis was carried `=(3xx96500(C))/(0.5(C))=579000 s=(579000)/(60xx60)=160.83` hr. (c ) Litres of CHLORINE EVOLVED : `3Cl^(-) to underset(3//2xx22.4 L) Cl_(2)(g)+underset(3F)(3e^(-))` =33.6 L 3 Faraday of charge will evolve `Cl_(2)`(g)=33.6 L. |
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| 21. |
Molten AlCl_(3) is electrolysed with a current of 0.5 amp to produce 27.0 g Al. (i) How many g eq. of all were produced ? (ii) How many gram-atoms of Al were produced ? (iii) How many atoms of Al were atoms of Al were produced ? (iv) How many electrons were required ? (v) What is the no. of faradays of electricity consumed ? (vi) How long did the electrolysis take place ? (vii) How many litres of Cl_(2) at NTP were produced ? |
| Answer» Solution :(i) 3G EQ (II) 1 (iii) Av. CONSTANT (iv) `3 xx` Av. Constant (v) 3F (vi)160 h 50 min (vii) 3-6 litres | |
| 22. |
Molten Ag absorbs about …..times of its volume of O_2: |
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Answer» 10 |
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| 23. |
Molisch's test is made for the detection of : |
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Answer» ALKYL HALIDE |
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| 24. |
Molisch's test is used for : |
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Answer» Monosaccharides |
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| 25. |
Molisch reagment is used to identify following compound : |
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Answer» GLUCOSE |
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| 26. |
Molisch's reagent may be used to distinguish between cane sugar and glucose solution.(True/False) |
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Answer» |
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| 27. |
Molisch reagent is used to identify following compound ? |
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Answer» Glucose |
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| 28. |
Moles of oxygen that can oxidise on mole of NH_(3) to NO |
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Answer» 1 |
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| 29. |
Moles of KMnO_4required to oxidise Imol of FeC_2O_4in acidic medium is : |
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Answer» 0.6 Moles of `KMnO_4` REQUIRED for OXIDATION of 1 mol of `FeC_2O_4 = 1/5 = 0.2 ` mol |
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| 30. |
Moles of KCIO_3 required for producing sufficient O_2 to react with 1 mole of aluminium will be (Molar mass of KCIO_3 = 122.5) |
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Answer» 2 mole |
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| 31. |
moles of an ideal gas expand isothermallty anad reversibly from pressure of 5 atm to 1 atm at 300 K . Calculate the largest mass than can be lifted through a height of 1 M by this expansion . |
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Answer» 4092.76 KG ` 2.303xx 20 XX 8.314 JK^(-1)MOL^(-1)xx300 K log 5/1` `80.15 xx 10^(3 J)` work done = mgh `80.15 xx 10^(3) = m xx 9.81 ms^(-2) xx1m` ` m = (80.15xx10^(3) KGM^(2)s^(-2))/(9.81 ms ^(-2)xx1m) = 8.17023xx10^(3)` ` 8170 . 2344 kg ` |
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| 32. |
Moles of K_(2)SO_(4) to be dissolved in 12 mol water to lowest its vapour pressure by 10 mm of Hg at a temperature at which vapour pressure of pure water is 50 mm is : |
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Answer» 3 mol |
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| 33. |
Moles of AgCl obtained with one mole of aqueous CrCl_3.SNH_3 is |
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Answer» 1 |
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| 34. |
Molecules whose mirror image is non-superimposable over them are known as chiral. Which of the following molecules is chiral in nature ? |
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Answer» 2-Bromobutane 
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| 35. |
Molecules whose mirror image is non-super-imposable over them are known as chiral. Which of the following molecules is chiral in nature? |
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Answer» 2-Bromobutane |
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| 36. |
Molecules whose mirror image is non superimposable over them are known as chiral. Which of the following molecules is chiral in nature ? |
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Answer» 2-Bromobutane |
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| 37. |
Molecules such as erythrose and threose, which are stereoisomers but not mirror images, are referred to as a pair of …………….. , D and L-threose are mirror images and are referred to as a pair of …………………. |
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Answer» ENANTIOMERS, disastereomers |
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| 38. |
Molecules that act as intercellular messengers are called . |
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Answer» enzymes |
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| 39. |
Molecules on the surface at critical micelle concentration..... |
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Answer» get DECOMPOSED. |
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| 40. |
Molecules of the amino acids that comprise our proteins have the property of being non-super imposable on their mirror images because,. They are said to be chiral or possess 'handedness'. Most of the amino acids are of left handed form, but with no reasons available. Even more interesting recent experiments have shown that a 7-9% excess of four amino acids is present in Murchison meteorite discovered in 1970. This analysis shows life could arise outside the confines of earth. The origin of unequal distribution is probably because of electromagnetic radiations emitted in a corkscrew fashion from the poles of spinning neutron stars could lead to a bias of one mirror image isomer over another when molecules form in interstellar space. A stereogenic carbon can be defined as a carbon atom bearing groups of such nature that an interchange of any two groups will produce a stereoisomer. The device that is used for measuring the effect of optically active compounds on plane polarized light is a polarimeter. The analyser in the polarimeter decides the activity of compound present. This is being decided on the basis of angle by which axis of analyser has to be rotated for complete brightness. Left, right or no adjustment decides l, d - activity or optical inactivity respectively. Stereogenic carbons can bring |
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Answer» OPTICAL activity |
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| 41. |
Molecules of the amino acids that comprise our proteins have the property of being non-super imposable on their mirror images because,. They are said to be chiral or possess 'handedness'. Most of the amino acids are of left handed form, but with no reasons available. Even more interesting recent experiments have shown that a 7-9% excess of four amino acids is present in Murchison meteorite discovered in 1970. This analysis shows life could arise outside the confines of earth. The origin of unequal distribution is probably because of electromagnetic radiations emitted in a corkscrew fashion from the poles of spinning neutron stars could lead to a bias of one mirror image isomer over another when molecules form in interstellar space. A stereogenic carbon can be defined as a carbon atom bearing groups of such nature that an interchange of any two groups will produce a stereoisomer. The device that is used for measuring the effect of optically active compounds on plane polarized light is a polarimeter. The analyser in the polarimeter decides the activity of compound present. This is being decided on the basis of angle by which axis of analyser has to be rotated for complete brightness. Left, right or no adjustment decides l, d - activity or optical inactivity respectively. Optically inactive isomer possessing chiral centres are categorized as |
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Answer» OPTICAL isomers |
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| 42. |
Molecules of the amino acids that comprise our proteins have the property of being non-super imposable on their mirror images because,. They are said to be chiral or possess 'handedness'. Most of the amino acids are of left handed form, but with no reasons available. Even more interesting recent experiments have shown that a 7-9% excess of four amino acids is present in Murchison meteorite discovered in 1970. This analysis shows life could arise outside the confines of earth. The origin of unequal distribution is probably because of electromagnetic radiations emitted in a corkscrew fashion from the poles of spinning neutron stars could lead to a bias of one mirror image isomer over another when molecules form in interstellar space. A stereogenic carbon can be defined as a carbon atom bearing groups of such nature that an interchange of any two groups will produce a stereoisomer. The device that is used for measuring the effect of optically active compounds on plane polarized light is a polarimeter. The analyser in the polarimeter decides the activity of compound present. This is being decided on the basis of angle by which axis of analyser has to be rotated for complete brightness. Left, right or no adjustment decides l, d - activity or optical inactivity respectively. EMR emitted in corkscrew fashion from poles of spinning neutrons are biased to |
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Answer» l-amino acids |
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| 43. |
Molecules of the amino acids that comprise our proteins have the property of being non-super imposable on their mirror images because,. They are said to be chiral or possess 'handedness'. Most of the amino acids are of left handed form, but with no reasons available. Even more interesting recent experiments have shown that a 7-9% excess of four amino acids is present in Murchison meteorite discovered in 1970. This analysis shows life could arise outside the confines of earth. The origin of unequal distribution is probably because of electromagnetic radiations emitted in a corkscrew fashion from the poles of spinning neutron stars could lead to a bias of one mirror image isomer over another when molecules form in interstellar space. A stereogenic carbon can be defined as a carbon atom bearing groups of such nature that an interchange of any two groups will produce a stereoisomer. The device that is used for measuring the effect of optically active compounds on plane polarized light is a polarimeter. The analyser in the polarimeter decides the activity of compound present. This is being decided on the basis of angle by which axis of analyser has to be rotated for complete brightness. Left, right or no adjustment decides l, d - activity or optical inactivity respectively. For existence of life, amino acids as ingredient of protein exist mainly in |
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Answer» l-form |
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| 44. |
Molecules of ethanoic acid in water dimerise when dissolved in : |
| Answer» Solution :benzene | |
| 45. |
Molecules of benzoic acid(C_(6)H_(5)COOH) dimerise in benzene. ‘w’ g of the acid dissolved in 30g of benzene shows a depression in freezing point equal to 2K. If the percentage association of the acid to form dimer in the solution is 80, then w is : (Given thatK_(f)=5K Kg "mol"^(-1)Molar mass of benzoic acid=122 g "mol"^(-1)) |
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Answer» 2.4 G |
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| 46. |
Molecules of a noble gas do not possess vibrational energy because a noble gas |
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Answer» is monoatomic |
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| 47. |
molecules of: |
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Answer» He |
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| 49. |
Molecule having non-polar as well as polar bonds but the molecule as a whole is polar |
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Answer» `S_(2)F_(2)` 
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| 50. |
Molecule having non-pola as well as polar bonds but the molecule as a whole is polar: |
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Answer» `(SCN)_(2)`  `(SCN)_(2)` molecule having non-polar as well as polar bonds but the molecule as a whole is polar DUE to its open book LIKE structure like `H_(2)O_(2)`.
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