InterviewSolution
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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. |
vii. The stability of dihalides of ` Si, Ge , Sn` and Pb increases steadily in the sequence :A. `PbX_(2) lt SnX_(2) lt GeX_(2) lt SiX_(2)`B. `GeX_(2) lt SiX_(2) lt SnX_(2) lt PbX_(2)`C. `SiX_(2) lt GeX_(2) lt PbX_(2) lt SnX_(2)`D. `SiX_(2) lt GeX_(2) lt SnX_(2) lt PbX_(2)` |
| Answer» Correct Answer - D | |
| 2. |
Assertion : Between `SiCl_(4)` and `C Cl_(4)` only `SiCl_(4)` reacts with water. Reason : `SiCl_(4)` is ionic and `C Cl_(4)` is covalent.A. Both A and R are true and R is the correct explanatoin of AB. both A and R are true but R is the correct explanation of AC. A is true but R is falseD. A is false but R is true |
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Answer» Correct Answer - C Reason: Silicon can expands its octet due to availability of vacant d-subshell in its valence shell. |
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| 3. |
Which of the following molecules invovles the formation of ` dpi -p pi` bonding ?A. TrimethylamineB. Carbon monoxideC. trisilylamineD. `C_(3)O_(2)` |
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Answer» Correct Answer - C In trisilylamine there is `p pi-d pi` bonding between N atom and silicon atoms of silyl group. |
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| 4. |
Which has the most stable `+2` oxidation state ?A. FeB. SnC. PbD. Si |
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Answer» Correct Answer - C In lead +2 oxidation state is more stable than +4 oxidation state. It is due to inert pair effect. |
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| 5. |
Which of the following gases are needed/absorbed by plants for their growth ?A. `N_(2)`B. `CO_(2)`C. `CO`D. `O_(2)` |
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Answer» Correct Answer - B in Photosynthesis `6CO_(2)+6H_(2)O overset("Sunlight")underset("Chlorophyll")to C_(6)H_(12)O_(6)+6O_(2)` |
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| 6. |
Among the elements of group 14 the one having highest tendency to show stable +2 oxidation state isA. CarbonB. PlumbumC. GermaniumD. Silicon |
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Answer» Correct Answer - B Lead (Plumbum) shows maximum inert pair effect due to non participation of ns electrons in bonding. |
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| 7. |
Carbon monoxide is absorbed byA. Ammonical cuprous chlorideB. pyrogallolC. chloroformD. `C Cl_(4)` |
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Answer» Correct Answer - A `Cu_(2)Cl_(2) +2CO hArr 2CuClCO` This reaction is used for the separation of CO from a mixture of gases. |
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| 8. |
Carbon monoxide is notA. a reducing agentB. a good oxidising agentC. neutral to litumsD. posisonous in nature |
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Answer» Correct Answer - B CO is not a good oxidising agent. |
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| 9. |
A solid element (symbol Y) conducts electricity and forms two chlorides YCln ( a colourless volatile liquid) and `YCln-2` (a colourless solid). To which one of the following groups of the periodic table does Y belong ?A. 13B. 14C. 15D. 16 |
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Answer» Correct Answer - B Element Y can be Sn. `SnCl_(4)` is a colourless volatile liquid, `SnCl_(2)` is a colourless solid, Sn conductors electricity. Tin belongs to group 14 of the periodic table. |
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| 10. |
Among the elements of group 14, the element having highest and that with lowest melting point are respectively.A. C,PbB. C,SnC. C, GeD. C,Si |
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Answer» Correct Answer - B Carbon has highest mp while tin has lowest mp among Group -14 elements. |
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| 11. |
The element that does not form a monoxide isA. LeadB. TinC. GermaniumD. Silicon |
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Answer» Correct Answer - D Silicon does not form monoxide, while all other elements of the group from monoxides. |
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| 12. |
A gas which burns with blue flame isA. COB. `O_(2)`C. `N_(2)`D. `CO_(2)` |
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Answer» Correct Answer - A `2CO + O_(2) to 2CO_(2)` CO burns with a blue flame. |
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| 13. |
Which of the following reactions occurs at the anode during the recharging of lead storage battery ?A. `Pb^(2)+2e^(-) to Pb`B. `Pb^(2+) + SO_(4)^(2-) to PbSO_(4)`C. `Pb to Pb^(2) +2e^(-)`D. `PbSO_(4)+2H_(2)O to PbO_(2) +4H^(+) +SO_(4)^(2-)+2e^(-)` |
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Answer» Correct Answer - D The reaction at cathode during charging of a lead storage battery is `PbSO_(4) +2H_(2)O to PbO_(2) +4H^(+) +So_(4)^(2-) +2e^(-)` |
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| 14. |
The acid used In lead storage cells isA. Phosphoric acidB. Nitric acidC. Sulphuric acidD. Hydrochloric acid |
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Answer» Correct Answer - C Sulphuric acid is used in lead storage batteries. |
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| 15. |
Which of the following is most denseA. FeB. CuC. BD. Pb |
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Answer» Correct Answer - D Out of the given four choices, Pb is the most dense. |
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| 16. |
Sillicon is an important constituent ofA. RocksB. MineralsC. AlloysD. Vegetables |
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Answer» Correct Answer - A Silicon in the form of silica or dand `(SiO_(2))` is an important constituent of rocks. |
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| 17. |
Which metal is an important constituent of transistor ?A. AgB. OsC. RaD. Ge |
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Answer» Correct Answer - D Ge because it is semiconductor. |
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| 18. |
Which of the following is not a constituent of soda glass ?A. Calcium silicateB. Sodium SilicateC. SilicateD. Silicic acid |
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Answer» Correct Answer - D Silicic acid is not a constituent of soda glass. |
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| 19. |
Silicon is an important constituent ofA. ChloropyllB. HaemolobinC. RocksD. Amalgams |
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Answer» Correct Answer - C Silicon is an important constituent of Rocks. Chlrophyll contains Mg Haemoglobin contains Iron Amalgam Contains Hg. |
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| 20. |
The formula for chrome yellow isA. `K_(2)CrO_(4)`B. `PbCrO_(4)`C. `Na_(2)CrO_(4)`D. `K_(2)Cr_(2)O_(7)` |
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Answer» Correct Answer - B `PbCrO_(4)` is called chrome yellow or lemon chrome. |
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| 21. |
Formula for tear gas isA. `COCl_(2)`B. `Cl_(3)NO_(3)`C. `N_(2)O`D. none of these |
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Answer» Correct Answer - B Ferricyanide ion contain iron in +III oxidation state. Therefore, ferricyanide is `[Fe(CN)_(6)]^(3-)`. |
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| 22. |
CO is poisonous gas. Antidote for CO poisoning isA. CarborundumB. CarborgenC. Carbonic acidD. Pure oxygen |
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Answer» Correct Answer - B Carbogen is 90% `O_(2)+5 ` to `10 % CO_(2)` |
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| 23. |
Here each questions contains statements given in two columnns which have to be matched. Statements in Column I are labelled as A, B C and D wheras the statements in Coloumn II are labelled as p,q,r and s. the answer to these questions are to be appropriately bubbled as illustrated below in the following example. if the correct matches are A-P, A-s,B-q, B-r, C p ,C-q and D-p, their correctly labelled 4 x 4 matrix should look the . `{:("Column I",,"Column II"),("(A) GeO",,"(p) Amphoteric "),("(B) CO",,"(q) Boric"),("(C) " SnO_(2),,"(r) Acidic"),("(D)" Te_(2)O,,"(s) Neutral"):}` |
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Answer» Correct Answer - A::B::C::D GeO is acidic , CO is neutral , `SnO_(2)` is neutral `Te_(2)O` is basic oxide. |
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| 24. |
Here each questions contains statements given in two columnns which have to be matched. Statements in Column I are labelled as A, B C and D wheras the statements in Coloumn II are labelled as p,q,r and s. the answer to these questions are to be appropriately bubbled as illustrated below in the following example. if the correct matches are A-P, A-s,B-q, B-r, C p ,C-q and D-p, their correctly labelled 4 x 4 matrix should look the . `{:("Column I",,"Column II"),("(A) Sn",,"(P) Highest density amongst group 14 elements "),("(B) Pb",,"(q) Lowest melting point amongst group 14 elements "),("(C) Si",,"(r) Lowest I.E. amongst group 14 elements"),("(D) Ge",,"(s) Semiconductor used in transistor"):}` |
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Answer» Correct Answer - A::B::C::D Sn has the lowest mp and the lowest IE and Pb has highest density among carbon family members and both Si and Ge are used as semiconductors in transition. |
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| 25. |
Which reaction represents plumbo solvency ?A. `Pb+2HCl to PbCl_(2)+H_(2)`B. `Pb+O_(2) to 2PbO`C. `2PbS+3O_(2) to 2PbSO_(4)+2SO_(2)`D. `Pb+O_(2)+2H_(2)O to 2Pb(OH)_(2)` |
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Answer» Correct Answer - D Plumbosolvency is the dissolution of lead in ordinary water. Due to this phenomenon lead pipes are not used for carrying water. |
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| 26. |
`[SiO_(4)]^(4-)` has tetrahedral structure, the silicate formed by using the three oxygen hasA. two dimensional sheet structureB. pyrosilicate structureC. linear polymeric structureD. three dimensional structure |
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Answer» Correct Answer - A In silicates having sheet structures (2D-structure) , each `SiO_(4)` tetrahedron share three oxygen atoms. |
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| 27. |
the silicate which contain extended anions areA. PyrosilicatesB. three dimensional silicatesC. ChainsilicatesD. Cyclicsilicates |
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Answer» Correct Answer - C Chain silicates contain extended anions. |
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| 28. |
The substance used as a smoke screen in warfare isA. `SiCl_(4)`B. `PH_(3)`C. `PCl_(5)`D. Acetylene |
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Answer» Correct Answer - A `SiCl_(4)` is used for the production of smoke screen in warfare. `SiCl_(4)` undergoes hydrolysis with moisture to from colloidal suspension of silicic acid in air. |
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| 29. |
The silicates which do not contain discrete anions areA. OrthosilicatesB. PyrosilicatesC. CyclilicatesD. Sheetsilicates |
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Answer» Correct Answer - D Sheet silicates do not contain discreate anions `SiO_(4)^(4-)` |
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| 30. |
The silicates which contain discrete anions areA. Sheet silicatesB. OrthosilicatesC. Three dimensional silicatesD. None of these |
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Answer» Correct Answer - B Orthosilicates contain discrete anions, `SiO_(4)^(4-)` |
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| 31. |
The basic structural unit of silicates isA. `SiO_(4)^(2-)`B. `SiO^(-)`C. `SiO_(4)^(4-)` ionD. `SiO_(3)^(2-)` |
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Answer» Correct Answer - C Silicates consist of `SiO_(4)^(4-)` tetrahedral units. It is their basic structural unit. |
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| 32. |
The hybrid state of silicon in silicates isA. `sp^(3)d`B. `sp^(3)`C. `sp^(2)`D. `dsp^(2)` |
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Answer» Correct Answer - B In silicates , each silicon is bonded to four oxygen atoms and hence is in `sp^(3)` -hybrid state. |
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| 33. |
Thomas slag isA. `Ca_(3)(PO_(4))_(2)`B. `CaSiO_(3)`C. mixture of (A) and (B)D. `FeSiO_(3)` |
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Answer» Correct Answer - C Thomas slag is a mixture of `Ca_(3)(PO_(4))_(2)` and `CaSiO_(2)`. It is used as a phosphorous fertilizers. |
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| 34. |
Halide that is not hydrolysedA. `SiCl_(4)`B. `SiF_(4)`C. `C Cl_(4)`D. `PbCl_(4)` |
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Answer» Correct Answer - C `C Cl_(4)` is not hydrolysed with water. |
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| 35. |
Halide that is not hydrolysedA. `SiCl_(4)`B. `C Cl_(4)`C. `SiF_(6)`D. `PbCl_(4)` |
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Answer» Correct Answer - B `C Cl_(4)` is not hydrolysed by water due to the absence of vacant d-orbitals in carbon |
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| 36. |
Assertion: tin(II) chloride is ionic and reducing in nature. Reason: Sn shows both +2 and +4 oxidation state.A. Both A and R are true and R is the correct explanatoin of AB. both A and R are true but R is the correct explanation of AC. A is true but R is falseD. A is false but R is true |
| Answer» Reason : Due to low ionisation energy `(IE_(1)+IE_(2))` tin in +2 oxidation state forms ionic bond. It can easily get oxidised to +4 oxidation state and as such can act as a reducing agent. | |
| 37. |
Which of the following compound of tin is a reducing agentA. `SnCl_(2)`B. `SnCl_(4)`C. SnOD. None |
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Answer» Correct Answer - A `SnCl_(2)` can act as reducing agent because it can change to `SnCl_(4)`. |
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| 38. |
Unlike the elements of group 1 and group 2. the elements of group 14, donot show close resemblance in their properties because.A. They have different valence shell configurationsB. The Penultimate shell of Group 14 elemants have different configurationsC. All the elemats of Group 14 contain d-electronsD. None of the above |
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Answer» Correct Answer - B Group 14 elements have different penultimate shell configuration C has `2es^(-)` , Si has 8, while Sn, Ge and Pb have 18 electrons in their penultimate shell. |
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| 39. |
The correct order of C-O bond length amongA. `CO lt CO_(2) lt CO_(3)^(2-)`B. `CO_(2) lt CO_(3)^(2-) lt CO`C. `CO lt CO_(3)^(2-) lt CO_(2)`D. `CO_(3)^(2-) lt CO_(2) lt CO` |
| Answer» Correct Answer - A | |
| 40. |
Which of the following is most electronegative ?A. PbB. SiC. CD. Sn |
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Answer» Correct Answer - C Carbon is more electronegative than Pb, Si or Sn. |
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| 41. |
Cassiterite is an ore ofA. CuB. SnC. SiD. B |
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Answer» Correct Answer - B Cassiterite or tin stone `(SnO_(2))` is an ore of tin, Sn. |
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| 42. |
Galena is an ore ofA. GalliumB. LeadC. TinD. Gernanium |
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Answer» Correct Answer - B Galena (PbS) is an ore lead. |
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| 43. |
Quartz is a crystalline variety (purest form ) ofA. SiB. `SiO_(2)`C. `Na_(2)SiO_(3)`D. SiC. |
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Answer» Correct Answer - B Quartz is a crystalline veriety of `SiO_(2)` |
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| 44. |
Which of the following is not an ore of lead ?A. GalenaB. plumbagoC. anglesiteD. cerussite |
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Answer» Correct Answer - B Plumbago is graphite |
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| 45. |
crystalline silicon was obtained byA. BerzeliusB. WohlerC. WinklerD. Deville |
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Answer» Correct Answer - D Deville. |
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| 46. |
Assertion : Plumbago is an allotropic form of lead. Reason: in Roman, lead is called Plumbum.A. Both A and R are true and R is the correct explanatoin of AB. both A and R are true but R is the correct explanation of AC. A is true but R is falseD. A is false but R is true |
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Answer» Correct Answer - D Assertion: Plumbago is another name of graphite like lead, graphite also marks paper. |
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| 47. |
Which one of the following allotropic forms of carbon is isomorphous with crystalline silicon?A. GraphiteB. CoalC. CokeD. Diamond |
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Answer» Correct Answer - D Diamond is isomorphous with crystalline silicon. |
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| 48. |
A red crystalline solid A reacts with nitric acid to form a chocolate-brown solid B insoluble in water. Both A and B reacts with HCl to form `PbCl_(2)`. A and B respectively areA. `PbO,PbO_(2)`B. `Pb_(3)O_(4),PbO_(2)`C. `PbO_(2),Pb_(3)O`D. `PbO_(2),PbO` |
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Answer» Correct Answer - B The reaction involved are `underset("(A)")(2Pb_(3)O_(4))+4HNO_(3) to 2Pb(NO_(3))_(2)+2H_(2)O+underset("(B)")(PbO_(2))` `underset("(A)")(Pb_(3)O_(4)+8HCl to 3PbCl_(2)+4H_(2)O+Cl_(2)` `underset("(B)")(PbO_(2))+4HCl overset(Delta)toPbCl_(2)+2H_(2)O+Cl_(2)` |
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| 49. |
Which of the following is not a compound ?A. Black leadB. White leadC. Red leadD. None |
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Answer» Correct Answer - A Black lead is not a compound. Red lead is `Pb_(3)O_(4)` white lead is `2PbCO_(3).Pb(OH)_(2)` |
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| 50. |
which of the following do not react with halogens directly ?A. SiB. SnC. CD. Pb |
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Answer» Correct Answer - C Halides of carbon can be produced only by the action of suitable halogen on hydrocarbons. |
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