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CBSE Questions for Class 12 Medical Chemistry Alcohols, Phenols And Ethers Quiz 10 - MCQExams.com

Dehydration of 2-butanol yields
  • 1-butene
  • 2-butene
  • 2-butyne
  • both (A) and (B)
Which of the following alcohol does not give a stable compound on dehydration?
  • Ethyl alcohol
  • Methyl alcohol
  • n-propyl alcohol
  • n-butyl alcohol
Which of the following would undergo dehydration most readily?
  • 1-phenyl-1butanol
  • 2-phenyl-2-butanol
  • 1-phenyl-2-butanol
  • 2-phenyl-1-butanol
Which compound is soluble in water
  • CS2
  • C2H5OH
  • CCl4
  • CHCl3
Which of the following reagents convert the propene to 1-propanol
  • H2O,H2SO4
  • Aqueous KOH
  • MhSO4,NaBH4/H2O
  • B2H6,H2O2,OH
The order of melting point of ortho, para, meta-nitrophenol is:
  • o>m>p
  • p>m>o
  • m>p>o
  • p>o>m
The product (B) is:
1770549_ff3cf45b4e03435baca7532caa13781e.png
  • All
The major product of (B) is:
Which compound is soluble in H2O 
  • HCHO
  • CH3CHO
  • CH3COCH3
  • All
Heating ethanol at 443 K with excess concentrated sulphuric acid results in the dehydration of ethanol to give ethane
  • True
  • False
The keto form of phenol contains
  • 3 π,12 δ 4 non-bonding electrons
  • 3 π,9 δ 4 non-bonding electrons
  • 3 π,9δ 2 non-bonding electrons
  • 3 π,8 δ 4 non-bonding electrons
Identify Z in the following series:
C2H5OHPBr3Xalc.KOH(i)H2SO4(ii)H2O+heatZ
  • CH2=CH2
  • CH3CH2OH
  • CH3CH2OCH2CH3
  • None
IUPAC name of the compound is:

CH3C|HCH2CH3CH2CHOHCH3 is 
  • 4-Methyl-3-hexanol
  • Heptanol
  • 4-Methyl-2-hexanol
  • None of these
Which of the following compound has wrong IUPAC name ?
  • CH3CH2CH2COOCH2CH2 ethyl butanoate
  • CH3C|HCH3CH2CHO 3-methylbutanal
  • CH3C|HOHC|HCH3CH3 2-methyl-3-butanol
  • CH3C|HCH3COCH2CH3 2-methyl-3-pentanone
Statement-1: In the fermentation process of molasses, along with yeast, (NH4)2SO4  and (NH4)3PO4 are added.
Statement-2: Both (NH4)3PO4 and (NH4)2SO4 act as food and help in the growth of yeast.
  • Statement-1 is True, statement-2 is True; statement-2 is a correct explanation for statement-1
  • Statement-1 is True, statement-2 is True; statement-2 is NOT a correct explanation for statement-1
  • Statement-1 is True, statement-2 is False
  • Statement-1 is False, statement-2 is True
Teritary alcohol is obtained as major product in

  • (CH3)2CHCH=CH2oxymercution/demercution
  • (CH3)3CCH=CH2dilH2SO4
  • (CH3)2CHCH=CH2Hydroboration,Oxidation
  • All of the above
Which reagent can be used to convert ethanol to diethyl ether?
  • Al2O3 at 2500C
  • conc. H2SO4 at 1700C
  • conc. H2SO4 at 13001400C
  • Al2O3 at 3500C
Hydrogen chloride and SO2 are the side products in the reaction of ethanol with thionyl chloride. Which of the following is main product in this reaction?
  • C2H5OC2H5
  • C2H6
  • CH3Cl
  • C2H5Cl
Which of the following substance can be used as a raw material for obtaining alcohol?
  • Potatoes
  • Molasses
  • Maize
  • All of the above
Which of the following catalyst is used in the conversion of water gas and hydrogen into methyl alcohol?
  • MnO
  • Raney Ni
  • Fe
  • ZnOCr2O3
Oxymercuration-demercuration reaction (Hg(OAc)2/THFH2O) followed by (NaBH4,C2H5OH) on CH3CH=CH2 produces:
  • CH3CH2CH2CO
  • CH3CH(OH)CH3
  • CH3CH(OH)CH2OH
  • CH3COCH3
Hydroboration-oxidation of CH3CH=CH2 produces:
  • CH3CH2CH2OH
  • CH3CH(OH)CH3
  • CH3CH(OH)CH2OH
  • CH3COCH3
An industrial method of preparation of methanol is:
  • catalytic reduction of carbon monoxide in presence of ZnOCr2O3
  • by reacting methane with steam at 9000C with a nickel catalyst
  • by reducing formaldehyde with lithium aluminium hydride
  • by reacting formaldehyde with aqueous sodium hydroxide solution
In which one of the following reagents OH bond fission in alcohol can not take place?
  • Na
  • CH3COOH
  • CH3MgBr
  • PCl5
Which of the following reactions are correctly represented?
Which of the following pairs of reagents will not form ether?
  • C2H5Br+C2H5ONa
  • C2H5Br+CH3ONa
  • CH3Br+C2H5ONa
  • C2H5Br+HCOONa
Compounds formed from P and Q are, respectively:
42154.PNG
  • Optically active S and optically active pair (T, U)
  • Optically inactive S and optically inactive pair (T, U)
  • Optically active pair (T, U) and optically active S
  • Optically inactive pair (T, U) and optically inactive S
(CO+H2)+H2673k,300atm,/Cr2O3ZnO 
The above shown reaction may by used for manufacture of:
  • HCHO
  • CH3COOH
  • HCOOH
  • CH3OH
2- phenyl propene on acidic hydration gives :
  • 2-phenyl-2-propanol
  • 2-phenyl-1-propanol
  • 3-phenyl-1-propanol
  • 1-phenyl-2-propanol
CH3MgXCH3COOC2H5ANaBC2H5BrC
Here, C is :
  • C2H5OC2H5
  • CH3COOC2H5
  • CH3COOCH3
  • (CH3)3COC2H5
How many structures of F are possible?

42989_afaceb628c234d94b62e6bd5caf2d65a.png
  • 2
  • 5
  • 6
  • 3
An organic compound (A) containing C, H and O has a pleasant odour with boiling point 780. On boiling (A) with concentrated H2SO4, colourless gas is evolved which decolorizes bromine water and alkaline KMnO4. The organic compound (A) is :
  • C2H5Cl
  • C2H5COOCH3
  • C2H5OH
  • C2H6

The structure of compound I is:

32372_60352c7742c341b8876aeb5c3e9f47cc.png
Ortho-nitrophenol is less soluble in water than para and meta-nitrophenols because:
  • o- nitrophenol is more volatile in steam than those of m- and p- isomers.
  • o- nitrophenol shows intramolecular Hbonding.
  • o-nitrophenol shows intermolecular Hbonding.
  • none of these.
Identify the structure of A:
  • CH3CH2CH2CH|OHCH3
  • (CH3)2CHCHOHCH3
  • (CH3)3CCH2OH
  • CH3CH2CH|OHCH2CH3
On oxymercuration-demercuration, the given compound produces the major product:
99826.jpg

The main product of the above reaction is:
78493_e0316cdf09d04d38977eb712f7075c94.PNG
Which of the following will be the correct product (P) for the given reaction?
117502_50f9149ed1b14776b738c252fd421d18.png

The addition of mercuric acetate in the presence of water is called oxymercuration. The adduct obtained gives alcohol on reduction with NaBH4 in alkaline medium. This is known as demercuration. Oxymercuration-demercuration allows Markownikoff's addition of H, OH without rearrangement. The net result is the addition of H2O
Based on the above information, find product A in the given reaction.

117531_d9ead791051544a3868b5076e0b73290.png
Identify the correct option(s) related with the physical properties of the unknown compounds [X] and [Y] formed as major and minor product respectively in the given reaction.

72221.jpg
  • Water solubility of [Y] is greater than [X]
  • Boiling point of [Y] is greater than [X]
  • Melting point of [Y] is greater than [X]
  • [X] is more volatile than [Y]
Propan1ol can be prepared from propene by :
  • H2O/H2SO4
  • Conc.H2SO4
  • B2H6 followed by H2O2/OH
  • CH3CO2H/H2SO4
Which of the following reagents should be used to prepare tert-butyl ethyl ether?
  • tert-butyl bromide and sodium ethoxide
  • tert-butyl alcohol and ethyl bromide
  • tert-butyl alcohol and ethanol
  • potassium tert-butoxide and ethyl bromide
Ethanol PBr3Xalc.KOHY(i)H2SO4roomtemperature(ii)H2O,HeatZ;
The product Z in the above reaction is:
  • CH3CH2OH
  • CH2=CH2
  • CH3CH2OCH2CH3
  • CH3CH2OSO3H
A(C7H8O)+Na/Δ No gaseous product
A+Br2/FeBr3C7H7OBr (Two isomers) 
A can be:
 C(CH3)2=C(CH3)2Cl2H2OAOHB
The compound B is:
  • (CH3)2C|OHC|Cl(CH3)2
  • (CH3)2C|OHC|OH(CH3)2
  • none of the above
The compound A and B are :
124157_bbee0e1877a24525bf8b0572e7448693.png
  • None of the above
Which of the following are possible products in the above reaction?
137127_901b502cf66348ac801a42f9a1ef3bc9.png

Give the expected major product of the above reaction.

122697_a9edf726838e49c7a5c020ffbcaf5e04.png
Which method is useful for the synthesis of ether?
Which of the followings is/are true regarding phenol?
  • It turns pink when exposed to air
  • It is less reactive than anisole in aromatic electrophilic substitution reaction
  • It is more reactive than aniline in an aromatic electrophilic substitution reaction
  • Acetylation of phenol decreases its reactivity in aromatic electrophilic substitution reaction
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