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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. |
Draw a flow chart to show classification of nitro compound giving examples for each type. |
Answer» SOLUTION :CLASSIFICATION of NITRO compoounds 
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| 2. |
Drugs that bind to the receptor site and inhibit its natural function are called |
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Answer» ANTAGONISTS |
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| 3. |
Draq the major product formed when 1- ethoxyprop - 1- ene is heated with one equivalent of HI |
Answer» Solution : This reaction FOLLOWS `SN^(1)` mechanism because in this reaction the more stable carbocation isformed that is doublebonded carbocation. Therefore, the GIVEN moleculereacts with HIto FORM ehtnaol and 1 - iodo prop - 1- ene. `CH_3-CH=CH - O C_2H_5overset(HI//Delta)tounderset(("1-iodo prop - 1 - ene"))(CH_3 - CH = CH-I) + underset(("ethanol"))(C_2H_5OH)` |
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| 4. |
Drugs that bind to the receptor site and inhibit its natural function are called : |
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Answer» |
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| 5. |
Drago suggested an emprical rule which is compatible with the energetics of hybridization. It will occupy a stereochemically inactive s-orbital, and the bonding will be through p-orbitals and bond angles will be nearly 90^(@) if the electronegativity of the surrounding atoms is le2.5. Q.Correct order of bond angle is : |
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Answer» `PH_(4)^(+)gtOF_(2)gtSF_(2)gtSbH_(3)gtH_(2)TE` |
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| 6. |
Drained sewage has biological oxygen demand (BOD): |
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Answer» More than water |
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| 7. |
Drugs possesing same structural features will have |
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Answer» Same MECHANISM of ACTION |
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| 8. |
Drago suggested an emprical rule which is compatible with the energetics of hybridization. It will occupy a stereochemically inactive s-orbital, and the bonding will be through p-orbitals and bond angles will be nearly 90^(@) if the electronegativity of the surrounding atoms is le2.5. Q. In which of the followingmolecule central atom has higher % s-character in itsbond pair: |
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Answer» <P>`AsH_(3)` |
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| 9. |
Drugs possesing same structural features will have A) Same mechanism of action B) Similar physiological & psycological effect C) Similar phormocological effect. |
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Answer» Only A and B are correct |
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| 10. |
Drugs can be classifiedon the basis of |
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Answer» CHEMICAL structure |
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| 11. |
Dows reaction involves |
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Answer» ELECTRO prilic addition |
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| 12. |
Drug which helps to reduce anxiety and brings about calmnes is : |
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Answer» tranquilizer |
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| 13. |
Dow's process of extraction of Mg involves extraction of Mg from sea water. Sea water is concentrated in sun light and is then treated with slaked lime. Magnesium hydroxide is heated in a stream of HCl to give MgCl_(2) which is electrolyzed to discharge Mg. the mixture is in the ratio 35% MgCl_(2) + 50% NaCl + 15% CaCl_(2). NaCl and CaCl_(2) are added to lowr the fusion temperature and to increase the conductance. {:(Mg^(2+) + Ca(OH)_(2) rarr Mg (OH)_(2) + Ca^(2+)),(Mg(OH)_(2) + 2HCl rarr MgCl_(2) + 2H_(2)O(l)),("Electrolysis of fused" MgCl_(2) overset("Anode")rarr 2Cl^(-)rarr Cl_(2) + 2_(-1e^(0))overset("cathode")rarr Mg^(2+) + 2_(-1e^(0)) rarr Mg):} Mg electrolysed is protected from atmospheric oxidation by a blanket of inert gases. Molten mixture of NaCl of CaCl_(2) is added to the heated MgCl_(2).xH_(2)O with dry HCl gas because : |
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Answer» `MgCl_(2).xH_(2)O + "dry HCl" overset(973-1023 K)rarr` Partially dehydrated |
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| 14. |
Drug which helps to reduce anxiety |
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Answer» TRANQUILISER |
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| 15. |
Dow's process of extraction of Mg involves extraction of Mg from sea water. Sea water is concentrated in sun light and is then treated with slaked lime. Magnesium hydroxide is heated in a stream of HCl to give MgCl_(2) which is electrolyzed to discharge Mg. the mixture is in the ratio 35% MgCl_(2) + 50% NaCl + 15% CaCl_(2). NaCl and CaCl_(2) are added to lowr the fusion temperature and to increase the conductance. {:(Mg^(2+) + Ca(OH)_(2) rarr Mg (OH)_(2) + Ca^(2+)),(Mg(OH)_(2) + 2HCl rarr MgCl_(2) + 2H_(2)O(l)),("Electrolysis of fused" MgCl_(2) overset("Anode")rarr 2Cl^(-)rarr Cl_(2) + 2_(-1e^(0))overset("cathode")rarr Mg^(2+) + 2_(-1e^(0)) rarr Mg):} Mg electrolysed is protected from atmospheric oxidation by a blanket of inert gases. Molten mixture contains Mg^(2+), Na^(+) and Ca^(2+) but at cathode only Mg is discharged because : |
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Answer» standard REDUCTION potential of Mg is LEAST among the three |
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| 16. |
Drug targets are biomolecules such as _______ , _______ , _______and _______ |
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Answer» |
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| 17. |
Dow's process of extraction of Mg involves extraction of Mg from sea water. Sea water is concentrated in sun light and is then treated with slaked lime. Magnesium hydroxide is heated in a stream of HCl to give MgCl_(2) which is electrolyzed to discharge Mg. the mixture is in the ratio 35% MgCl_(2) + 50% NaCl + 15% CaCl_(2). NaCl and CaCl_(2) are added to lowr the fusion temperature and to increase the conductance. {:(Mg^(2+) + Ca(OH)_(2) rarr Mg (OH)_(2) + Ca^(2+)),(Mg(OH)_(2) + 2HCl rarr MgCl_(2) + 2H_(2)O(l)),("Electrolysis of fused" MgCl_(2) overset("Anode")rarr 2Cl^(-)rarr Cl_(2) + 2_(-1e^(0))overset("cathode")rarr Mg^(2+) + 2_(-1e^(0)) rarr Mg):} Mg electrolysed is protected from atmospheric oxidation by a blanket of inert gases. In the hydrated chloride of Mg the value of x is : |
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Answer» 6 |
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| 18. |
Drawback of DDT as pesticide is that : |
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Answer» it BECOMES ineffective after sometime |
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| 19. |
Dow's process of extraction of Mg involves extraction of Mg from sea water. Sea water is concentrated in sun light and is then treated with slaked lime. Magnesium hydroxide is heated in a stream of HCl to give MgCl_(2) which is electrolyzed to discharge Mg. the mixture is in the ratio 35% MgCl_(2) + 50% NaCl + 15% CaCl_(2). NaCl and CaCl_(2) are added to lowr the fusion temperature and to increase the conductance. {:(Mg^(2+) + Ca(OH)_(2) rarr Mg (OH)_(2) + Ca^(2+)),(Mg(OH)_(2) + 2HCl rarr MgCl_(2) + 2H_(2)O(l)),("Electrolysis of fused" MgCl_(2) overset("Anode")rarr 2Cl^(-)rarr Cl_(2) + 2_(-1e^(0))overset("cathode")rarr Mg^(2+) + 2_(-1e^(0)) rarr Mg):} Mg electrolysed is protected from atmospheric oxidation by a blanket of inert gases. Mg^(2+) + Ca (OH)_(2) rarr Mg(OH)_(2) darr + Ca^(2+) This reaction indicates : |
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Answer» `Mg(OH)_(2)` is weaker base than `Ca(OH)_(2)` |
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| 21. |
Dow's process of extraction of Mg involves extraction of Mg from sea water. Sea water is concentrated in sun-light and is then treated with slaked lime. Magnesium hydroxide is heated in a stream of HCl to give MgCl_(2) which is electrolysed to discharge Mg. The mixture is in the ratio 35% MgCl_(2)+50% NaCl+15% CaCl_(2). NaCl and CaCl_(2) are added to lower the fusion temperature and to increases the conductance. Mg^(2+) +Ca(OH)_(2) to Mg(OH)_(2)+Ca^(2+) Mg(OH)_(2)+2HCl to MgCl_(2)+2H_(2)O(l) Electrolysis of fused MgCl_(2) hArr Mg^(2+)+2Cl Mg^(2+)+2e^(-) to Mg( At Cathode) 2Cl^(-) to Cl_(2)+2e^(-) (At Anode) Mg electrolysed is protected from atmospheric oxidation by a blanket of inert gases. Molten mixutre of NaCl and CaCl_(2) is added to the heated MgCl_(2) because : |
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Answer» `MgCl_(2). xH_(2)O+ " DRY " HCl overset(973-1223K) to ` Partially dehydrated `MgCl_(2)` and molten mixture `(NACL+CaCl_(2))` makes it fully dehydrated |
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| 22. |
Draw the types of cubic crystal systems. |
Answer» SOLUTION :
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| 23. |
Dow's process f extraction of Mg involves extraction of Mg from sea water. Sea water is concentrated issun light and is then treated with milk of lime. Magnesium hydroxide obatained is reactedwith dilute HCl and MgCl_(2) thus obtained is crystallised. The molten mixture containing angydrous 35% MgCl_(2), 50% NaCl and 15%CaCl_(2) is electrolysed when magnesium is discharged at cathode. NaCl and CaC_(2) are added to lower the fusion temperature and to increase to the conductance. Mg electrolysed is protected from atmospheric oxidation by a blanket of inert gases. Molten mixture of NaCl and CaCl_(2) is added to hte molten MgCl_(2) beacuse: |
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Answer» it increase the melting POINT of `MgCl_(2)`. |
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| 24. |
Draw the types of orthorhombic cubic crystal systems. |
Answer» SOLUTION :
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| 25. |
Dow's process f extraction of Mg involves extraction of Mg from sea water. Sea water is concentrated issun light and is then treated with milk of lime. Magnesium hydroxide obatained is reactedwith dilute HCl and MgCl_(2) thus obtained is crystallised. The molten mixture containing angydrous 35% MgCl_(2), 50% NaCl and 15%CaCl_(2) is electrolysed when magnesium is discharged at cathode. NaCl and CaC_(2) are added to lower the fusion temperature and to increase to the conductance. Mg electrolysed is protected from atmospheric oxidation by a blanket of inert gases. Select the correct statement. |
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Answer» Langbenite contains potassium and MAGNESIUM. |
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| 26. |
Draw the types of monoclinic primitive cubic crystals. |
Answer» SOLUTION :
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| 27. |
Dow's process is for ________. |
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Answer» MANUFACTURE of phenol |
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| 28. |
Draw the tetragonal crystal systems |
Answer» SOLUTION :
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| 29. |
Double salts are addition compounds which lose their identify in aqueous solution whereas complexes which are also addition compounds do not lose their identify in aqueous solution. The coordination compounds show isomerism and find application in photography , qualitative analysis, metallurgy, water purification and in the treatment of various diseases. Choose the correct option for the complex [Pt Cl_(2)(en)_(2)]^(2+). |
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Answer» Platinum is in `+2` oxidation state |
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| 30. |
Double salts are addition compounds which lose their identify in aqueous solution whereas complexes which are also addition compounds do not lose their identify in aqueous solution. The coordination compounds show isomerism and find application in photography , qualitative analysis, metallurgy, water purification and in the treatment of various diseases. Which of the following statement is incorrect ? |
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Answer» Alum is a double salt |
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| 31. |
Draw the strutural formula and write the IUPAC name of (i) N, N-dimethyl aniline (ii) Benzyl amine (iii) N-methyl benzylamine |
Answer» SOLUTION :(i) N, N-dimethyl ANILINE 
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| 32. |
Double salts are addition compounds which lose their identify in aqueous solution whereas complexes which are also addition compounds do not lose their identify in aqueous solution. The coordination compounds show isomerism and find application in photography , qualitative analysis, metallurgy, water purification and in the treatment of various diseases. Which of the following statement is true for the complex, [Co(NH_(3))_(4)Br_(2)]NO_(2)? |
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Answer» It shows IONISATION, linkage and geometrical isomerism. |
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| 33. |
Draw the structures of white phosphours and red phosphours. Which one of these two types of phosphours is more reactive and why ? |
Answer» Solution : White PHOSPHORUS is more reactive than red phosphours. Then various `P_(4)` moleucles of white phosphorurs are held togather by WEAK Vander WALL's force of attraction. Which makes it very reactive. On the other hand, molecules of red phosphours are joined by COVALENT bonds to give a polymeric structure, which makes it very stable and LESS reactive. |
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| 34. |
Draw the structuresof white phosphorus and red phosphorus. Which one of these two types of phosphorus is more reactive and why? |
Answer» SOLUTION :Structure of white and RED Phosphorus:  White phosporus is more REACTIVE due to its DISCRETE tetrahedral structure and ANGULAR strain. |
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| 35. |
Double strand helix structure of DNA was given by |
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Answer» ALBERT Einstein |
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| 36. |
Draw the structures of white phosphorus and red phosphorus. Which one of these two types of phosphorus is more reactive and why? |
Answer» SOLUTION : White PHOSPHORUS is more REACTIVE due to its discrete tetrahedral structure and ANGULAR strain. |
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| 38. |
Dopamine is a neurotransmitter, a molecule that serves to transmit message in the brain. The chemical formula of dopamine is C_(8)H_(11)O_(2)N. .How many moles of oxygen atoms are present in 76.5 gm of Dopamine :- |
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Answer» 1 mole |
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| 39. |
Draw the structures of white phosphorus and red phosphorus. Which one of these two types of Ophosphorus is more reactive and why? |
Answer» SOLUTION : White phosphorus is more REACTIVE because of ANGULAR strain in `P_4` MOLECULE where the angles are only `60^@` . It readily catches fire in air to give dense white fumes of `P_4 O_(10)` . `P_4 + 5O_2 to P_4O_(10)` . |
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| 40. |
Doping of Ag Cl crystals with CdCl_(2) results in |
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Answer» FRENKEL defect |
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| 41. |
Draw the structures of these geometrical isomers. |
Answer» SOLUTION :The GEOMETRICAL ISOMERS are REPRESENTED as under : 
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| 42. |
Draw the structures of the possible isomers of the aromatic compound C_(7)H_(7)Cl. Which of them has the weakest C-Cl bond? |
Answer» SOLUTION : BENZYL CHLORIDE has the WEAKEST C-Cl BOND. |
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| 43. |
Draw the structures of the major nucleophilic products in each of the following |
Answer» SOLUTION : .
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| 44. |
Dopamine act as …………….. |
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Answer» |
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| 45. |
Draw the structures of the optically active unsaturated compound having molecular formula C_(5)H_(9)Br, that after addition of H_(2) becomes either optically inactive or shows optical activity. |
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Answer» Solution :The two possible COMPOUNDS are : `CH_(3)CH_(2) underset(I) underset(Br) underset(|)overset(**)CH - CH = CH_(2) "" BrCH_(2) - underset(II)underset(CH_(3))underset(|)overset(**)CH - CH = CH_(2)` Carbons BEARING `**` mark are chiral carbons . Compound I on addition of `H_(2)` GIVES `underset("Optically inactive (no chiral carbon)") (CH_(3)cH_(2)underset(Br)underset(|)CHCH_(2)CH_(3))` Compound II on addition of `H_(2)` gives `underset("Optically active (contains chiral carbon)") (BrCH_(2) - underset(CH_(3))underset(|)overset(**)CH - CH_(2)CH_(3))` |
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| 46. |
Draw the structures of themonomers fo the following polmers : (i) Teflon (ii) Polythene . |
| Answer» Solution :(i) `UNDERSET("TETRAFLUOROETHENE ")(CF_(2) = CF_(2)) ` (II) `underset("Ethene")(CH_(2) = CH_(2))` | |
| 47. |
Draw the structures of the monomers of the following polymers : (i) Bakelite, (ii) Nylon-6. |
Answer» Solution :(i) BAKELITE :  (II) Nylon-6 : `NH_(2)-(CH_(2))_(4)-COOH` |
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| 48. |
Draw the structures of the major monohaloproducts in each of the following reaction: |
Answer» Solution : The reaction is CARRIED in the presence of DRY acetone upon heating. It is called finkelstein reaction. In this reaction. `I^(-)` ion being a stronger NUCLEOPHILE displaces `Br^(-)` ion. NaBr formed is insoluble in dry acetone WHEREAS NAI dissolves. this shifts the equilibrium in the frward direction.  Under the reaction conditions allylic halogenation will take place. Addition of bromine can be possible in case the reaction is carried at room temperature. |
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| 49. |
Draw the structures of the following molecules : (i) XeF_2 (ii) H_2S_2 O_8 |
Answer» SOLUTION :(i) `XeF_2` (II) `H_2S_2O_8` 
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| 50. |
Draw the structures of the following : (i) XeOF_4(ii) H_4P_2 O_7 |
Answer» SOLUTION :STRUCTURES of `XeOF_4 and H_4P_2O_7` are GIVEN as under : 
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