chemistry test 7 to 11 first year

8/10/2019 Chemistry Test 7 to 11 first year

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Prepared By:samman sammi

0333-6006036

GRAND TESTCHAP 7 to 11

1. In t butyl alcohol the tertiary carbon atom is bonded to:(a) Two hydrogen atoms(b) Three hydrogen atoms(c) Four hydrogen atoms(d) Hydroxyl group only

2. Linear shape is associated with which set of hybrid orbitals?

(a) SP(b) SP2 (c) SP3 (d) dsP 2

3. Ethers show the phenomenon of:(a) Position isomerism(b) Functional group isomerism(c) Metamerism(d) Cis trans isomerism

4. The total coal resources of Pakistan are estimated by geologicalsurvey of Pakistan to:

(a) 284 billion tones(b) 184 billion tones(c) 841 billion tones(d) In huge reservoirs

5. Butene can have:(a) Two positional isomers only(b) Cis and trans isomers only(c) Both (a) and (b)

(d) None of isomers6. Carbon carbon bond is shortest in:

(a) Ethane(b) ethylene(c) Acetylene(d) Benzene

7. The aliphatic compounds are of two types:


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(a) Straight chain and cyclic(b) Straight chain and branched(c) Branched chain and Alicyclic(d) Homocyclic and Alicyclic

8. Fractional distillation of petroleum gives ________ gasoline:(a) 10%(b) 20%(c) 30%(d) 40%

9. Those compounds which have any atom other C as member ofring are called as:

(a) Homocyclic(b) Hetrocyclic(c) Aliphatic

(d) Both (a) & (b)10. Dimethyl ether and ethyl alcohol are an example of:

(a) Chain isomerism(b) Positional isomerism(c) Metamerism(d) Functional group isomerism

11. If similar groups are attached in one side it is called:(a) Cis - form(b) Trans - form(c) Tautomeric form(d) None of these

12. Single bond ______________ rotate.(a) Can(b) Cannot(c) Can never(d) None of them

13. Vinyl acetylene combines with HCl to form:(a) Poly acetylene(b) Benzene

(c) Chloroprene(d) Divinyl acetylene

14. An aldehyde is reduced to alkane with hydrazine in the presenceof:

(a) KOH(b) NaOH(c) CaO and NaOH


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(d) Ca (OH) 2

15. Which one of the following compounds on dehalogenationproduce an alkene?

(a) Vicinal dihalide(b) Geminal dihalide(c) Tetra halide(d) All above

16. Zn + HCl are used in:(a) Clenenson reduction(b) Wolf kishner reduction(c) Kolbs electrolysis

(d) Wutrz reaction17. The order of dehydration of Alcohol is:

(a) 1o >2o > 3 o

(b) 1o >3o > 2 o

(c) 2o >3o > 1 o

(d) 3o >2o > 1 o

18. Which one of given has only primary hydrogen atom?(a) n - petane(b) Isopentane(c) Neopentane(d) All of these

19. As the number of carbon atom increases the boiling points ofalkanes:

(a) Remains constant(b) Decreases(c) Increases(d) May increases or decreases

20. Which product will be obtained when ethene reactshypocholorous acid?

(a) Ethylene chlorohydrine(b) Ethanol(c) Chloroethane(d) All of above

21. Alkene is produced from alkyl chloride by:(a) Hydration(b) Dehalogenation


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(c) Dehydrohalogenation(d) Dehydration

22. The number of Acidic Hydrogen in propyne is:

(a) 1(b) 2(c) 3(d) 4

23. Ozololysis of C 2H 4 forms:(a) Glyoxal only(b) Formaldehyde(c) Formic acid(d) Glyoxal and formic acid

24. When disodium succinate is electrolysed, it gives:(a) C2H2 (b) C2H6 (c) methane(d) C2H4

25. Amongst the following, the compound that can be most readilysulphonated is:

(a) toluene(b) benzene

(c) nitrobenzene(d) chlorobenzene

26. The conversion of n hexane into benzene by heating in thepresence of Pt is called:

(a) Isomerization(b) Aromatization(c) Dealkylation(d) Rearrangement

27. On hydrogenation benzene liberates energy:(a) 358.5 KJ / mole(b) 208 KJ / mole(c) 272 KJ / mole(d) 320 KJ / mole

28. Wurtz fitting reaction is used to prepare:(a) Benzene(b) Alkylbenzene


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36. Which of given formula is Benzyl chloride?

(a)

(b)

(c)

(d)

37. When CO 2 is made to react with ethyl magnesium iodide, followedby acid hydrolysis, the product formed is:

(a) Propane(b) Propanoic acid(c) Propanal(d) Propanol

38. Elimination bimolecular reactions involve:(a) First order kinetics(b) Second order kinetics(c) Third alkyl halides(d) All the three

39. For which mechanisms, the first step involved is the same.(a) E1 and E2(b) E2 and S N2(c) E1 and E2(d) E1 and S N1

CH 2Cl

Cl

C Cl

H

Cl

C Cl

Cl

Cl


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40. Which one of the following is not a nucleophile:(a) H2O(b) H2S(c) BF3 (d) NH

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41. Reactions in which the halogen is replaced by some other atom orgroup of atoms are called:

(a) - Elimination(b) SN - reactions(c) Addition reaction(d) Oxidation reaction

42. When a chiral alkyl halide is subjected to SNI reaction, inversionof configuration takes place i.e.,

(a) 40%

(b) 60%(c) 50%(d) 80%

43. In elimination reactions nucleophile attacks on:(a) - Hydrogen(b) Hydrogen(c) Hydrogen(d) None of these

44. Which bond is most stable?(a) C - Cl(b) C - F(c) C - Br(d) C - I

45. With the increase in size of halogen atom the reactivity of an alkylhalide:

(a) Increase(b) Decreases(c) Remains constant(d) None of these

46. Which is a good nucleophile as well as a good leaving group?(a) F- (b) Cl - (c) Br - (d) I-


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47. An electrophile may be:

(a) Positive(b) Negative(c) Neutral

(d) Both (c) & (a)48. Which of given ion is most stable?

(a) Primary carbonium ion(b) Tertiary carbonium ion(c) Secondary carbonium ion(d) None of these

49. Which of the following substance is used to convert alcohol toalkyl halide?

(a) Thinonyl chloride(b) Phosphorous trichloride(c) HCl + ZnCl 2 (d) All of these

50. Which compound is more soluble in water?(a) C2H5OH(b) C6H3OH(c) CH 3OCH 3 (d) n - Hexanol

51. Ethanol can be converted into ethanoic acid by:(a) Hydrogenation

(b) Hydration(c) Oxidation(d) Fermentation

52. Rectified spirit contains alcohol about:(a) 80%(b) 85%(c) 90%(d) 95%

53. When eyhyl bromide is heated with Ag 2O the product formed is:(a) Ethanol(b) Ethene(c) Ethanal(d) Diethyl ether


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54. Which of the following are considered as derivatives of water?(a) aloud(b) phenol(c) ether(d) all of these

55. Which of the following is an example of trihydric alcohol?(a) methanol(b) glycol(c) glycerol(d) none of them

56. Now a days methanol is prepared from:(a) CO(b) CO 2 (c) H2

(d) Water gas57. Which is a reagent for Lucas fest?

(a) ZnCl 2 + conc. HCl(b) Zn(c) Na(d) Br

58. Carbolic acid is the other name for:(a) Methanol(b) Ethanol(c) Propanol(d) Phenol

59. Which is most acidic?(a) methanol(b) ethanol(c) carbolic acid(d) none of these

60. Alcohols of less molecular masses are:(a) Soluble in H 2O(b) Insoluble in H 2O

(c) Insoluble in all solvents(d) Solid at room temperature

chemistry test 7 to 11 first year

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