CHEMISTRY TEST 2 - PAK ARMED FORCES TEST

QUIZ START

Results

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QUIZ START

#1. Q.69 Which one of the following has three structural isomers?

(CH3)3CH

(CH3)2CHCH3

CH3 - CH2 - CH2 - CH2 - CH3

CH3 - CH2 - CH2 - CH2 - CH2 - CH3

#2. Q.70 C6H5CH3 has:

sp2 hybrid orbitals only

sp2, 2p_z and sp3 hybrid orbitals

sp and sp2 hybrid orbitals

sp2 and 2p_z orbitals only

#3. Q.71 The true statement about ethanol and dimethyl ether is:

both are polar

ethanol is polar while dimethyl ether is non-polar

both have planar structure

they are chain isomers

#4. Q.72 A and B are two organic compounds: A is aliphatic while B is aromatic, identify A and B:

A = C2H4, B = C6H6

A = C2H6, B = C3H8

A = C2H4, B = C4H6

A = C6H6, B = C2H4

#5. Q.73 Alicyclic compounds can be:

open chain

aromatic

homocyclic

heterocyclic

#6. Q.74 All are Hydrocarbons except:

benzene

naphthalene

cyclohexene

benzoic acid

#7. Q.75 A compound that has closed ring of carbon atoms but lacks alternate double and single bonds is called:

Hetero cyclic

Aliphatic

Alicyclic

aromatic

#8. Q.76 CCl3CHO has the IUPAC name:

1, 1, 1 - Trichloroethanal

2, 2, 2 - Trichloroethanal

Trichloro acetaldehyde

1, 1, 1 - Trichloro acetaldehyde

#9. Q.77 Which of the following is not an aromatic hydrocarbon:

azulene

Toluene

Chlorobenzene

Ethyl benzene

#10. Q.78 2-methyl propene is an isomer of:

1-butene

2-butene

cis-2-butene

all

#11. Q.79 What is true about formyl and carbonyl group:

both are found in aldehydes

both are found in ketones

both are terminal functional groups

both have sp2 hybridized carbon

#12. Q.80 A compound with Molecular formula C4H9Cl can’t show:

Structural isomerism

Position isomerism

Chain isomerism

Metamerism

#13. Q.81 Which of the following molecules represents the order of hybridization sp2, sp2, sp, sp from left to right atoms?

HC # C - C # CH

CH2 = CH - C # CH

CH2 = CH - CH = CH2

CH3 - CH = CH - CH3

#14. Q.82 Which hydrocarbon on treatment with hot acidified potassium manganate(VII), would give ethanoic acid only:

CH3-CH=CH-CH3

CH3-CH=CH2

(CH3)2C=CHCH3

(CH3)2C=C(CH3)2

#15. Q.83 Alkenes combine readily with electrophilic reagents such as halogens giving:

Haloalkanes

Gem dihalides

Vicinal dihalides

Vinyl halides

#16. Q.84 The structure of isobutyl group in an organic compound is:

CH3 - CH2 - CH2 - CH2 -

CH3 - C(CH3)2 -

(CH3)2CH - CH2 -

CH3 - CH - CH2 - CH3

#17. Q.87 In which way ethane and propane similar?

They are both obtained by dehydration of alcohols

They are both neutral to an indicator solution

They both undergoes polymerization under suitable conditions

The complete combustion of alkanes to produce carbon dioxide and water is an important exothermic reaction.

#18. Q.89 Hydrogenation of alkenes/alkynes in the presence of Ni as catalyst at 300°C results in the formation of corresponding alkanes. This reaction is known as:

Sabatier - senderens reaction

Kolbes reaction

Cannizzaro's reaction

Haloform reaction

#19. Q.90 Ethyl hydrogen sulphate on hydrolysis with boiling water is converted to:

Methyl alcohol

Propyl alcohol

Ethyl alcohol

Ethylene

#20. Q.91 The order of dehydration of alcohol:

1° > 2° > 3°

1° > 3° > 2°

2° > 3° > 1°

3° > 2° > 1°

#21. Q.92 Which of the following reaction is characteristic of benzene:

Electrophilic substitution reaction

Reduction

Oxidation

Ozonolysis

#22. Q.93 Which of the followings is an ortho-para directing group:

-Cl

-NO2

-CN

-COOH

#23. Q.94 Which of the following is not meta directing group:

-NH2

-NO2

-CN

None of these

#24. Q.95 Amongst the following, the compound that can be most readily sulphonated is:

Toluene

Benzene

Nitrobenzene

Chlorobenzene

#25. Q.96 The nature of -Cl group is:

Ortho directing & activator

Meta directing & deactivator

Para directing & deactivator

Ortho and para directing & deactivator

#26. Q.97 When benzene is nitrated, conc. HNO3 and conc. H2SO4 react to form an intermediate which attacks the benzene ring. Which one of the following represents this intermediate?

NO+

NO2+

NO2-

NO2

#27. Q.98 Nitrobenzene may be prepared by reacting benzene with a mixture of conc. HNO3 and conc. H2SO4. Which of the following best explains the role of H2SO4?

Removing the water produced

Protonating HNO3

Acting as a solvent

Forming an unstable complex

#28. Q.99 Presence of peroxides affect the addition of:

HBr

HCl

All

#29. Q.100 The compound most likely to decolourise a solution of alkaline KMnO4 is:

CH3 - CH3

C10H8

(CH3)4C

CH3CH = CHCH2CH2CH3

#30. Q.101 Which of the following reactions will yield 2, 2-dibromopropane?

H2C = CH2 + 2HBr ->

CH3C # CH + 2HBr ->

CH3CH = CH2 + HBr ->

CH3CH = CHBr + HBr

#31. Q.102 Which of the following is produced by the action of CH3Cl on benzene in presence of AlCl3 followed by oxidation in the presence of acidified KMnO4 give:

Toluene

o-Xylene

m-Xylene

Benzoic acid

#32. Q.103 The conversion of benzene into cyclohexane is _________

Exothermic process

Isothermic process

Endothermic process

Both A and B

#33. Q.104 This reaction is an example of: Benzene + 3H2 –Ni/Pt–> Cyclohexane

Addition reaction

Elimination reaction

Substitution reaction

Polymerization

#34. Q.105 X is decolored when alkyl benzene are readily oxidized to benzoic acid, X is:

Aqueous KMnO4 or K2Cr2O7

Cold dilute alkaline KMnO4 or K2Cr2O7

Alcoholic KMnO4 or K2Cr2O7

Acidified KMnO4 or K2Cr2O7

#35. Q.106 Benzoic acid is the only oxidation product along with formation H2O and CO2 of an organic compound A, when A is treated with acidified potassium dichromate, A is:

Ethyl benzene

Benzoyl halide

Aniline

Benzophenone

#36. Q.107 The organic chloro compound which shows complete stereo chemical inversion during SN2 reaction is:

(C2H5)2CHCl

(CH3)3CCl

(CH3)2CHCl

CH3 - Cl

#37. Q.108 Consider the following haloalkanes: 1. CH3F, 2. CH3Br, 3. CH3Cl, 4. CH3I. The increasing order of reactivity in SN reactions is:

4 < 3 < 2 < 1

1 < 3 < 2 < 4

1 < 2 < 3 < 4

1 < 2 < 4 < 3

#38. Q.109 Second step of which of the following pair of reaction is same:

E1 + SN1

E2 + SN1

SN1 + SN2

None of these

#39. Q.110 Which of the following is the most stable carbocation:

Secondary

Primary

Tertiary

All have same stability

#40. Q.111 Which reagent is a good nucleophile?

NH3

HBr

Br2

BH3

#41. Q.112 CH3 – CH2 – OH + Alc. NH3 ——->

CH3CH2-NH2

CH3-CH2-H

CH2=CH2

CH3-CH2-CH3

#42. Q.113 There are four alcohols P, Q, R and S with 3, 2, 1 and zero alpha-hydrogens which will not respond to Na2Cr2O7/H2SO4:

#43. Q.114 Alkanol + [O] –K2Cr2O7/H2SO4–> A –[O]–> B. The correct products are:

A = C_nH_2nO, B = C_nH_2nO2

A = C_nH_2nO, B = C_nH_2nO

A = C_nH_2nO2, B = C_nH_2nO

A = C_nH_2nO, B = C_nH_2n-2O

#44. Q.115 Phenol on treatment with dil. HNO3 at low temperature give:

o-Nitrophenol

m-Nitrophenol

p-Nitrophenol

Both A and C

#45. Q.116 Phenol can be distinguished from alcohol by:

Tollen's reagent

Br2(aq)

NaHCO3

HCl

#46. Q.117 Phenol and ethanol can be distinguish by all except:

Iodoform test

Na-metal

Aq. Br2

Lucas-reagent

#47. Q.118 The reaction of phenol in which ring is involved except:

Nitration

Esterification

Sulphonation

Bromination

#48. Q.119 What is correct order for acidity of water, phenol and ethanol:

C6H5OH > H2O > C2H5OH

H2O > C2H5OH > C6H5OH

C6H5OH > C2H5OH > H2O

H2O > C6H5OH > C2H5OH

#49. Q.120 Conjugation between unshared electron pair on oxygen and aromatic ring in phenoxide ion results in:

Shorter C - O bond distance

Stable base

Stronger acidic character

All of these

#50. Q.121 The alcohol more acidic in nature is:

Methanol

Propanol

Ethanol

Butanol

#51. Q.122 Which one can be used as test for phenol:

C6H5OH + CH3COCl in the presence of aq. NaOH

C6H5OH + HCHO in the presence of NaOH

C6H5O-Na+ + CH3CH2Br

C6H5OH + Br2 (excess)

Finish

Results

#1. Q.69 Which one of the following has three structural isomers?

#2. Q.70 C6H5CH3 has:

#3. Q.71 The true statement about ethanol and dimethyl ether is:

#4. Q.72 A and B are two organic compounds: A is aliphatic while B is aromatic, identify A and B:

#5. Q.73 Alicyclic compounds can be:

#6. Q.74 All are Hydrocarbons except:

#7. Q.75 A compound that has closed ring of carbon atoms but lacks alternate double and single bonds is called:

#8. Q.76 CCl3CHO has the IUPAC name:

#9. Q.77 Which of the following is not an aromatic hydrocarbon:

#10. Q.78 2-methyl propene is an isomer of:

#11. Q.79 What is true about formyl and carbonyl group:

#12. Q.80 A compound with Molecular formula C4H9Cl can’t show:

#13. Q.81 Which of the following molecules represents the order of hybridization sp2, sp2, sp, sp from left to right atoms?

#14. Q.82 Which hydrocarbon on treatment with hot acidified potassium manganate(VII), would give ethanoic acid only:

#15. Q.83 Alkenes combine readily with electrophilic reagents such as halogens giving:

#16. Q.84 The structure of isobutyl group in an organic compound is:

#17. Q.87 In which way ethane and propane similar?

#18. Q.89 Hydrogenation of alkenes/alkynes in the presence of Ni as catalyst at 300°C results in the formation of corresponding alkanes. This reaction is known as:

#19. Q.90 Ethyl hydrogen sulphate on hydrolysis with boiling water is converted to:

#20. Q.91 The order of dehydration of alcohol:

#21. Q.92 Which of the following reaction is characteristic of benzene:

#22. Q.93 Which of the followings is an ortho-para directing group:

#23. Q.94 Which of the following is not meta directing group:

#24. Q.95 Amongst the following, the compound that can be most readily sulphonated is:

#25. Q.96 The nature of -Cl group is:

#26. Q.97 When benzene is nitrated, conc. HNO3 and conc. H2SO4 react to form an intermediate which attacks the benzene ring. Which one of the following represents this intermediate?

#27. Q.98 Nitrobenzene may be prepared by reacting benzene with a mixture of conc. HNO3 and conc. H2SO4. Which of the following best explains the role of H2SO4?

#28. Q.99 Presence of peroxides affect the addition of:

#29. Q.100 The compound most likely to decolourise a solution of alkaline KMnO4 is:

#30. Q.101 Which of the following reactions will yield 2, 2-dibromopropane?

#31. Q.102 Which of the following is produced by the action of CH3Cl on benzene in presence of AlCl3 followed by oxidation in the presence of acidified KMnO4 give:

#32. Q.103 The conversion of benzene into cyclohexane is _________

#33. Q.104 This reaction is an example of: Benzene + 3H2 –Ni/Pt–> Cyclohexane

#34. Q.105 X is decolored when alkyl benzene are readily oxidized to benzoic acid, X is:

#35. Q.106 Benzoic acid is the only oxidation product along with formation H2O and CO2 of an organic compound A, when A is treated with acidified potassium dichromate, A is:

#36. Q.107 The organic chloro compound which shows complete stereo chemical inversion during SN2 reaction is:

#37. Q.108 Consider the following haloalkanes: 1. CH3F, 2. CH3Br, 3. CH3Cl, 4. CH3I. The increasing order of reactivity in SN reactions is:

#38. Q.109 Second step of which of the following pair of reaction is same:

#39. Q.110 Which of the following is the most stable carbocation:

#40. Q.111 Which reagent is a good nucleophile?

#41. Q.112 CH3 – CH2 – OH + Alc. NH3 ——->

#42. Q.113 There are four alcohols P, Q, R and S with 3, 2, 1 and zero alpha-hydrogens which will not respond to Na2Cr2O7/H2SO4:

#43. Q.114 Alkanol + [O] –K2Cr2O7/H2SO4–> A –[O]–> B. The correct products are:

#44. Q.115 Phenol on treatment with dil. HNO3 at low temperature give:

#45. Q.116 Phenol can be distinguished from alcohol by:

#46. Q.117 Phenol and ethanol can be distinguish by all except:

#47. Q.118 The reaction of phenol in which ring is involved except:

#48. Q.119 What is correct order for acidity of water, phenol and ethanol:

#49. Q.120 Conjugation between unshared electron pair on oxygen and aromatic ring in phenoxide ion results in:

#50. Q.121 The alcohol more acidic in nature is:

#51. Q.122 Which one can be used as test for phenol:

❌ Your Wrong Attempts: