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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. |
Duraluminium an alloy contains : |
| Answer» SOLUTION :Duralininium (Al-95%,Cu-4%, Mg-0.5 % Mn -0.5 %) | |
| 2. |
Duralumin is used in aircraft industry for its light weight and high strength . It is an alloy of |
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Answer» Al, CU, MG and Mn |
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| 4. |
Draw labelled diagram of Hall-Heroult electrolytic cell for the extraction of aluminium write anode and cathode reactions. |
Answer» Solution : `{:("At CATHODE :"Al_("(melt)")^(3+)+3e^(-)rarr Al_((L))),("At ANODE :"C_((s))+2O_("(melt)")^(2-)rarrCO_((g))+2E^(-)),(""C_((s))+2O_("(melt)")^(2-)rarrCO_(2(g))+4e^(-)):}` |
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| 5. |
Duralumin is an alloy of ………. |
| Answer» Solution :`Al-95%, Cu-4%, Mn-0.5%, Mg-1.1%` | |
| 6. |
Draw isomers of the complex ion [Co(en)_(2)Cl_(2)]^(+) |
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Answer» Solution :Two geometrical ISOMERS Two optical isomers of CIS FORM |
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| 7. |
Due to which reason, O_(2) gas librates from the blood of tissues of animal boidies ? |
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Answer» partial PRESSURE of oxygen gas is less in TISSUES. |
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| 8. |
Draw enatiomers of each of the following compounds using Fischer projection formula: (i) Cl-underset(Br)underset(|)(CH)-F (ii) CH_(3)-underset(OH)underset(|)(CH)-CH_(2)OH (iii) CH_(3)-underset(CH_(3))underset(|)(CH)-underset(Br)underset(|)(CH)-CH_(3) (iv) CH_(3)CH_(2)-underset(CH_(3))underset(|)(CH)-CH_(2)CH_(2)Cl |
Answer» SOLUTION :
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| 10. |
Dulong and Petit's law is valid only for |
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Answer» metals |
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| 11. |
Draw energy level diagram and indicate the number of electrons in each level for the complex [Cu(H_(2)O)_(6)]^(2+). Whether the complex is paramagnetic or diamagnetic ? |
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Answer» Solution :`Cu` in `[Cu(H_(2)O)_(6)]^(2+)` has `+2` oxidation STATE. Electronic configuration of `Cu` ATOM `-3d^(10)4s^(1)` Electronic configuration of `Cu^(2+)` ion `-3d^(9)`. Distortions in OCTAHEDRAL Geometry Observer in `[Cu(H_2 O)_6 ]^(2+)` If the ground electronic configuration of a non-linear complex is orbitally degenerate , the complex will distort so as to remove the degeneracy and achieve a lower ENERGY. This is called the Jahn-Teller Effect.  `Cu^(2+)` : Two ways of filling the eg orbitals , there is degeneracy and Jahn-Teller DISTORTION is observed Jahn-Teller Distortion in Cu(II) complexs `([Cu(H_2 O)_6 ]^(2+)` 
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| 12. |
Due to which of the following reason diamondis non conductor of electricity ? |
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Answer» Hardnes |
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| 13. |
Due to which polymer having tensile strength and elasticity ? |
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Answer» Intemolecular forces |
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| 14. |
Draw Ellingham diagram [DeltaG^(@)VsT] for the oxidation of carbon monoxide and for the formation of Fe_(2)O_(3) and CO. Suggest suitable reducing agents for the reduction of Fe_(2)O_(3) at a temperature below 983 K (710^(@)C) and at a temperature above 983 K. |
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Answer» SOLUTION :Ellingham diagram for CO Ellingham diagram for `CO_(2)` and `Fe_(2)O_(3)` Below 983K - CO Above 983K - C 
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| 15. |
Due to vulcanization, rubber becomes |
| Answer» Solution :hard | |
| 16. |
Draw cis and trans geometrical isomers of (i)Bromodichloroiodopalladium (II) ion [Co(III)(NH_(3))_(3)Cl_(3)] |
Answer» SOLUTION :(i) Bromodichloroiodopalladium(II) ION, `[Pd Br Cl_(2)I]^(2+)`, 
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| 17. |
Due to __________ Tl^(+) ion is more stable than n^(3+) ion. |
| Answer» SOLUTION :INERT PAIR EFFECT | |
| 18. |
Due to the present of -CHO group glucose reacts with hydroxylamine to form an oxime. |
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Answer» |
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| 19. |
Due to the presence of ambidentate ligands coordination compounds show isomerism. Palladium complexes of the type [Pd(C_(6)H_(5))_(2)(SCN)_(2)] and [Pd(C_(6)H_(5))_(2)(NCS)_(2)] are |
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Answer» LINKAGE isomers. |
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| 20. |
Draw and name the molecular shape of SF_6. |
Answer» SOLUTION :`SF_6` has OCTAHEDRAL SHAPE SHOWN below:
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| 21. |
Due to the presence of ambidentate ligands coordination compounds show isomerism. Palladium complexes of the type [Pd(C_(6)H_(5))_(2)(SCN)_(2)]" and "[Pd(C_(6)H_(5))_(2)(NCS)_(2)] are : |
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Answer» LINKAGE isomers |
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| 22. |
Draw and explain thestructureof glyceraldehyde. |
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Answer» Solution :(i) `underset("D-Glyceraldehyde")(H-underset(CH_2 OH)underset(|)OVERSET(CHO)overset(|)C-OH) ""underset("L-Glyceraldehyde")(HO-underset(CH_2 OH)underset(|)overset(CHO)overset(|)C-H)` (ii)D - Glyceraldhyde and L - glyceraldehyde are twoenantiomers . (iii)D(or) (+)is dextrorotatoryand L (or) (-) is LEVOROTATORY. |
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| 23. |
Due to the presence of ambidentate ligands coordination compounds show isomerism. Palladium complexes of the type [Pd(C_(6)H_(5))_(2)(SCN)_(2)]and [Pd(C_(6)_H_(5))_(2)(NCS)_(2)] are |
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Answer» LINKAGE isomers |
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| 24. |
Draw and explain about the structure of permanganate ion. |
Answer» Solution : Permanganate ION has tetrahedral GEOMETRY in which the central `Mn^(7+)` is `sp^(3)` hybridised. |
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| 25. |
Due to the presence of ambidentate ligands coordination compounds show isomerism. Palladium complexes of the type [Pt(C_(6)H_(5))_(2)(SNC)_(2)] and [Pt(C_(6)H_(5))_(2)(NSC)_(2)] are - |
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Answer» LINKAGE isomers. |
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| 26. |
Draw and explain about the structure of chromate and dichromate ion. |
Answer» Solution : (i) Both CHROMATE and dichromate ions are oxo anions of chromium and they are moderately strong oxidising agents. (ii) In both structures, chromium is in +6 oxidation state. (iii) In an aqueous solution, chromate and dichromate ions can be inter convertible, and in an alkaline solution, chromate ion is predominant, WHEREAS dichromate ion BECOMES predominant in acidic SOLUTIONS. |
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| 27. |
Due to the decrease in the size of Ln^(3+) ions, the ionic character of Ln-OH bond decreases which results in the ..... |
| Answer» SOLUTION :DECREASE in the BASICITY | |
| 28. |
Due to _________, the +2 oxidation state of group 14 elements gradually becomes stable down the group. |
| Answer» SOLUTION : INERT PAIR EFFECT | |
| 29. |
Drawthe structureof dichromate ion. |
Answer» Solution : (i) Both chromate and dichromate ions are oxo ANIONS of chromium and they are moderately STRONG oxidising agents. (ii) In both STRUCTURES, chromium is in +6 oxidationstate. (iii) In an aqueous solution, chromate and dichromate ions can be INTER convertible, and in an alkaline solution, chromate ion is predominant, whereas dichromate ion BECOMES predominant in acidic solutions. |
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| 30. |
Due to stress a person is unable to sleep." In that condition, what type of drug will be prescribed by the doctor? |
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Answer» Antimicrobial |
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| 31. |
Draw all the isomers (geometricals and optical) of (i) [CoCl_(2)(en)_(2)] (ii) [Co(NH_(3))Cl(en)_(2)]^(2+) (iii) [Co(NH_(3))_(2)Cl_(2)(en)]^(+) |
Answer» Solution : (III) Three geometrical isomers are POSSIBLE :  Each of these is unsymmetrical and hence will show OPTICAL ISOMERISM, i.e., exist in two FORMS d and l. |
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| 32. |
Due to lanthanoid contraction, basic strength of oxides and hydroxides of lanthanoids increases with ul"increase in atomic number." |
| Answer» SOLUTION :DECREASES | |
| 33. |
Draw all the isomers (geometrical and optical) of : [Co(NH_(3))Cl(en)_(2)]^(2+) |
Answer» Solution :CIS- and trans-forms are given below. Only cis FORM will EXHIBIT optical ISOMERISM as SHOWN below: 
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| 34. |
Due to hectic and busy schedule, Mr. Singh started taking junk food in the lunch break and slowly become habitual of eating food irregularly to excel in his field. One day during meeting he felt severe chest pain and fell down. Mr. Khanna, a closefriend of Mr. Singh. took him to doctor immediately. The doctor diagnosed that Mr. Singh was suffering from acidity and prescribed some medicines. Mr. Khanna advised him to eat home made food and change his lifestyle by doing yoga, meditation and some physical exercise. Mr Singh followed his friend's advice and after few days he started felling better. After reading the above passage, answer the following : (i) What are the values (at least two) displayed by Mr. Khanna? (ii) What are antacids ? Give one example. (iii) Would it be advisable to take antacids for a long period of time ? Give reason. |
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Answer» Solution :(i) Mr. KHANNA is concerned and caring to his friend. He believes in living HEALTHY life by doing yoga, MEDITATION, physical exercise etc. (ii) The substances which NEUTRALIZE the excess acid and raise the pH to an appropriate alkaline and trigger the production of even more acid. Hence, causes more ACIDITY. Moreover, it causes esophageal cancer. |
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| 35. |
Draw all the isomers (geometrical and optical) of : [Co(NH_(3))_(2)Cl_(2)(en)]^(+) |
Answer» Solution :Four geometrical ISOMERS are POSSIBLE. These are obtained by changing the relative POSITIONS of the ligands as shown below :  Each of these being unsymmetrical will show optical isomerism. |
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| 36. |
Due to hectic and busy schedule, Mr. Angad made his life full of tensions and anxiety. He started taking sleeping pills to overcome the depression without consulting the doctor. Mr. Deepak, a close friend of Mr. Angad, advised him to stop taking sleeping pills and suggested to change his lifestyle by doing yoga, meditation and some physical exercise. Mr. Angad followed his friend's advice and after few days he started feeling better After reading the above passage, answer the following : (i) What are the values (at least two) displayed by Mr. Deepak ? (ii) Why is it not advisable to take sleeping pills without consulting doctor ? (iii) What are tranquilizers ? Give two examples. |
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Answer» Solution :(i)Mr Deepak displayed values about awareness of bad effects of drugs and expressed concern about the HEALTH of his friend. (ii) Sleeping pills have many harmful effects on the health such as burning and tingling in the hands, feet and legs causes constipation, diarrhoea,DIZZINESS and drowsiness. Overdoses of sleeping pills often cause death In view of these health hazards, sleeping pills should never be taken and if need be they should be taken only after consulting the doctor (iii) Drugs which are used for the TREATMENT of STRESS, fatigue, MILD and severe mental diseases are called tranquilizers For example, chlordiazepoxide, equanil, valium and barbiturates like veronal, luminal, seconal, etc |
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| 37. |
Draw all the isomers (geometrical and optical) of : [CoCl_(2)(en)_(2)]^(+) |
Answer» Solution :`[CoCl_(2)(EN)_(2)]` exhibits GEOMETRICAL isomerism as under :  `CIS-[CoCl_(2)(en)_(2)]` exhibits optical isomerism whereas trans-form does not because the d- and I-forms are superimposable. Optical ISOMERS of the cis-form are GIVEN below : 
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| 38. |
Due to hectic and busy schedule, Mr. Singh started taking Junk food in the lunch break and slowly became habitual of eating food irregularly to excel in his field. One day, during a meeting he felt severe chest pain and fell down. Mr. Khanna, a close friend of Mr. Singh took him to doctor immediately. The doctor diagnosed that Mr. Singh was suffering from acidity and prescribed some medicines. Mr. Khanna advised him to eat homemade food and change his lifestyle by doing yoga, meditation and some physical exercise. Mr. Singh followed his friend's advice and after few days he started feeling better. What are the values (atleast two) displayed by Mr. Khanna?What are antacids? Give one Example.Would it be advisable to take antacids for a long period of time? Give reason. |
| Answer» SOLUTION :SUPPORTIVE , AWARE | |
| 39. |
Due to hectic and busy schedule, Mr. Singh started taking junk food in the lunch break and slowly became habitual of eating food irregularly to excel in his field. One day during meeting he felt severe chest pain and fell down. Mr. Khanna, a close friend of Mr. Singh, took him to a doctor immediately. The doctor diagnosed that Mr. Singh was suffering from acidity and prescribed some medicines. Mr. Khanna advised him to eat home made food and change his lifestyle by doing yoga, meditation and some physical exercise. Mr. Singh followed his friend's advice and after few days he started feeling better. After reading the above passage, answer the following: (i) What are the values (at least two) displayed by Mr. Khanna ? (ii) What are antacids ? Give one example. (iii) Would it be advisable to take antacids for a long period of time ? Give reason. |
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Answer» Solution : (i)Mr. Khanna expressed his sincerity and responsibility of a GOOD friend and was concerned about the health and physical fitness of his friend Mr. Singh (ii) Substances which reduce the release of excess HCl by PREVENTING the interaction of HISTAMINE with the receptors present in the stomach are called ANTACIDS. The commonly used antacids are cimetidine and ranitidine. (iii) It is not advisable to take antacids for a long period of TIME because continuous use of antacids does not prevent the interaction of histamine with the receptors present in the stomach wall. As a result, release of HCI continues and the problem of hyperacidity remains |
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| 40. |
Draw all reasonable resonance structures for each species. |
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Answer» |
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| 41. |
Due to Frenkel defect, the density of the ionic solids |
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Answer» INCREASES |
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| 42. |
Due to Frenkel defect, the density of ionic solids: |
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Answer» Increases |
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| 43. |
Draw all reasonable resonance structures for each species. |
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Answer» |
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| 44. |
Due to depletion of ozone layer, chlorofluorocarbons (CFCs or freons-12) are being phased out as refrigerants, and propellants? Suggest some substitutes. |
| Answer» Solution :Substitutes for CHLOROFLUOROCARBONS or freon-12 are are hydrochlorofluorocarbons (HCFCs) such as `CHClF_(2)` (also CALLED freon-22) and `CHCl_(2)F` and hydroluorocarbons (HFCS) such as `FCH_(2)CH_(2)F` (HFC-152). Due to rpesence of C-H bonds, both these types of COMPOUNDS are generally destroyed at lower altitudes beore they reach the stratosphere. | |
| 45. |
Due to Frenkel defect the density of ionic solid |
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Answer» increases |
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| 46. |
Draw all possible stereo isomers of a complex Ca[Co(NH)_(3)Cl(Ox)_(2)] |
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Answer» Solution :Possible stereo isomers of a complete `CA[CO(NH_(3))Cl(OX)_(2)]` `(i)` 
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| 47. |
Drying oils are used |
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Answer» In the MANUFACTURE of paints |
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| 48. |
Draw all possible geometrical isomers of the complex [Co(en)_(2)Cl_(2)]^(+) and identify the optically active isomer. |
Answer» Solution : The coordination COMPLEX `[Co(en)_(2)Cl_(2)]^(+)` has three ISOMERS two OPTICALLY active cis forms and the optically INACTIVE trans form . 
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| 49. |
Draw all possible geometrical isomers of the complex [Co(en)_2 Cl_2]^(+)and identify the optically active isomer. |
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Answer» Solution :` (##SUR_CHE_XII_V01_C05_E02_009_S01.png" WIDTH="80%"> `CIS[Co(EN)_2 ]^(+) `is optically ACTIVE |
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