hitechpathshala

Q. 1

Q.1 The number of alkanols and ethers represented by the molecular formulae C3H8O and C4H10O respectively are given by the set-

(A) 2 , 1 ; 3 , 2

(B) 1, 2 ; 2 , 3

(C) 2 , 1 ; 4 , 3

(D) 2 , 1 ; 3 , 4

Q. 2

Q.2 Which is mismatched -

(A) C2H5 –O–C2H5 Four primary carbon atoms

(B) CH3 –CH2 –CH(OH)CH3 Optically active

(C) CH3 –O–CH (CH3 ) 2 Two secondary carbon atoms

(D) Ether is heated with CH3COCl in presence of AlCl3 CH3COOC2H5 + C2H5Cl

Q. 3

Q.3 Diethyl ether is metamer of -

(A) Ethoxyethane

(B) Methyl propyl ether

(C) Methoxyethane

(D) Ethoxymethane

Q. 4

Q.4 Anhydrides of alcohol are nothing but -

(A) Ethers

(B) Aldehydes

(C) Esters

(D) Alkyl anhydrides

Q. 5

Q.5 Electron pair donating tendency is maximum in -

(A) Me–O–H

(B) Me–O–Me

(C) Et–O–H

(D) Et–O–Et

Q. 6

Q.6 Which of the following is a cyclic ether-

(A) Ethyl ether

(B) Vinyl ether

(C) Phenyl ether

(D) Tetrahydrofurane

Q. 7

Q.8 In order to obtain diethyl ether from ethanol, the latter is taken in -

(A) In equal amount of sulphuric acid

(B) In slightly lesser amount of sulphuric acid

(C) In excess amount of sulphuric acid

(D) In far lesser amount of sulphuric acid

Q. 8

Q.9 For making (CH3)3C–O–C2H5 the ideal combination is -

(A) (CH3 ) 3CONa and C2H5Br

(B) (CH3 ) 3CBr and C2H5ONa

(C) Both the above

(D) None

Q. 9

Q.10 Mixed ether will not be formed in the reaction-

(A) CH3OCH2Cl + C2H5MgBr

(B) CH2N2 + C2H5OH

(C) C2H5ONa + CH3 I

(D) C2H5OH + H2SO4 (140oC)

Q. 10

Q.11 In which case ether is formed -

(A) (CH3 ) 3C–Br + CN-

(B) CH3CH2Br + (CH3 ) 3 CO-

(C) (CH3 ) 3 C–Cl + OC2H5-

(D) None of the above

Q. 11

Q.12 Diethyl ether acts as a -

(A) Lewis acid

(B) Lewis base

(C) Reducing agent

(D) Oxidising agent

Q. 12

Q.13 Ethers like alcohols do not form strong..... bonding . Hence they are more volatile -

(A) Covalent

(B) Hydrogen

(C) Coordinate

(D) None of the above

Q. 13

a

b

c

d

Q. 14

Q.15 Diethyl ether absorbs oxygen to form -

(A) Red coloured sweet smelling compound

(B) Acetic acid

(C) Ether sub oxide

(D) Ether peroxide

Q. 15

Q.16 Diethyl ether and air gives ether- hydroperoxide. The mechanism of the reaction is -

(A) Nucleophilic substitution

(B) Free radical addition

(C) Free radical substitution

(D) None of the above

Q. 16

Q.17 The order of reactivity of halogen acids with ether is -

(A) HCl > HBr > HI

(B) HI > HBr > HCl

(C) HCl > HI > HBr

(D) HI > HCl > HBr

Q. 17

A

B

C

D

Q. 18

Q.19 Ether on carbonylation gives -

(A) Alkanoic acid

(B) Alkanone

(C) Alkyl alkanoate

(D) Alkanal

Q. 19

A

B

C

D

Q. 20

Q.20 First member of ether series on reaction with sodium and liquified ammonia gives -

(A) Methanol + methane

(B) Ethane+ methanol

(C) Ethanol

(D) Ethane

Q. 21

Q.21 Which of the following compounds forms an adduct with diethyl ether through coordinate bond -

(A) BF3

(B) Oxygen of air

(C) HCl gas

(D) All of the above

Q. 22

Q.22 Which of the following is a false statement -

(A) Diethyl ether gives ethyl iodide on reacting with HI

(B) Diethyl ether and methyl isopropyl ether are chain isomers

(C) Diethyl ether is a Lewis base

(D) Diethyl ether hydrolyses to ethanol by dil.H2SO4

Q. 23

Q.23 Mark the correct statement -

(A) Ethers behave as Lewis base

(B) Ethers form coordination complexes with Lewis acids

(C) With cold HI diethyl ether gives ethyl alcohol & ethyl iodide

(D) All are correct

Q. 24

Q.24 Ethers are quite stable towards -

(A) Oxidising agents

(B) Reducing agents

(C) Na metal

(D) Bases

Q. 25

Q.25 Ether is used as -

(A) An antiseptic and a solvent

(B) An anaesthetic and a solvent

(C) A fire extinguisher under the trade name pyrene

(D) A dry cleaning solvent

Q. 26

Q.1 Ether in contact with air for a long time form peroxides. The presence of peroxide in ether can be tested by adding Fe2+ ion in it and then adding -

(A) KCNS

(B) SnCl2

(C) HgCl2

(D) KI

Q. 27

Q.3 Ether reacts with chlorine in the dark to form-

(A) CH2Cl — CH2 — O — CH2 — CH3

(B) CH2Cl — CH2 — O — CH2 — CH2Cl

(C) CH3 — CH (Cl) — O — CH(Cl) — CH3

(D) CCl3 — CH2 — O — CH2 — CCl3

Q. 28

Q.4 Ether does not form oxonium salt on reaction with -

(A) Cold conc. H2SO4

(B) Cold conc. HCl

(C) Conc. HI

(D) None of the above

Q. 29

Q.5 The ordinary alkyl ethers are cleaved by -

(A) Ethanol

(B) Ethyl halide

(C) BF3

(D) Hydrogen iodide

Q. 30

Q.6 The decomposition of ethers by HI or HBr is called -

(A) Zerewitinoff's reaction

(B) Ziesel's method

(C) Williamson's method

(D) Hell-Volhard-Zelinsky reaction

Q. 31

A

B

C

D

Q. 32

Q.8 Unsymmetrical ethers are best prepared by -

(A) Willamson's continuous etherification process

(B) Reacting Grignard reagent with alkyl halide

(C) Treating sodium alkoxides with alkyl bromides

(D) Heating an alkanol with conc. H2SO4

Q. 33

Q.9 Which of the following is used as an additive by fire departments under the name Rapid- Water -

(A) Ethylene glycol

(B) Polyethylene oxide

(C) Epichlorohydrin

(D) Epoxy oxide

Q. 34

Q.10 In the Williamson's synthesis for diethyl ether, which species works as a nucleophile -

(A) Halide ion

(B) Ethoxide ion

(C) Ethyde ion

(D) Hydride ion

Q. 35

A

B

C

D

Q. 36

Q.12 Ether bottles should not be kept open in air because -

(A) Ether is an anaesthetic

(B) Ether forms an explosive peroxide

(C) Ether is costly

(D) Ether gets oxidised to ethanol

Q. 37

Q.13 Isopropyl alcohol vapour is passed over alumina heated at about at about 240oC. The product formed is -

(A) diisopropyl ether

(B) propene

(C) a mixture of diisopropyl ether and propene

(D) 3-hexene

Q. 38

Q.14 Which of the following is not expected to give ether on reaction with sodium methoxide -

(A) CH3CH2CH2Cl

(B) CH2 = CHCH2Cl

(C) PhCH2Cl

(D) CH2 = CHCl

Q. 39

A

B

C

D

Q. 40

Q.16 Dimethyl ether, Me2O, is highly soluble in water while diethyl ether, Et2O, is only sparingly soluble because -

(A) Me2O reacts with water efficiently due to its small sized methyl groups but Et2O does not

(B) hydrogen bonding between Et2O and H2O is less efficient due to steric crowding around oxygen of Et2O while the hydrogen bonding between Me2O and H2O is much efficient due to small size of the methyl groups

(C) C2H5 – groups has a stronger +I effect than CH3 – group

(D) hyperconjugation of C – H bond is greater in Me2O than in Et2O

Q. 41

Q.17 The ether C6H5OCH2C6H5 on heating with concentrated HI produces -

(A) C6H5 I and C6H5CH2OH

(B) C6H5 I and C6H5CH2 I

(C) C6H5OH and C6H5CH2 I

(D) C6H5OH and C6H5CH2OH

Q. 42

A

B

C

D

Q. 43

Q.19 Ethyl methyl ether on heating with PCl5 produces -

(A) ethyl chloride and methyl alcohol

(B) acetyl chloride and methyl chloride

(C) ethylidene dichloride and methylene dichloride

(D) ethyl chloride and methyl chloride

Q. 44

(A) SN 1

(B) SN 2

(C) E1

(D) E2

Q. 45

A

B

C

D

Q. 46

Q.23 One mole of t-butyl methyl ether on being heated with 1 mole of concentrated hydriodic acid gives -

(A) CH3OH (1 mole) and (CH3 ) 3CI (1 mole)

(B) CH3 I (1 mole) and (CH3 ) 3COH (1 mole)

(C) CH3 I (1 mole) and (CH3 ) 3CI (1 mole)

(D) CH3OH (1 mole) and (CH3 ) 3COH (1 mole)

Q. 47

A

B

C

D

Q. 48

A

B

C

D

Q. 49

(A) 2-methyl 2--(1 methylethoxy)propane

(B) t-butyl isopropyl ether

(C) 1-isopropoxy-1,1-dimethylethane

(D) 2-(1, 1-dimethylethoxy)propane

CHEMISTRY QUIZ 37 (ETHER 1)

Marks: 200