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CBSE Questions for Class 12 Medical Chemistry Alcohols, Phenols And Ethers Quiz 14 - MCQExams.com

The compound which gives the most stable carbonium on dehydrogenation
  • CH3CH|CH3CH2OH
  • CH3CH3|C|CH3OH
  • CH3CH2CH2CH2OH
  • CH3CH|CH3CH2CH3
Picric acid is (at25oC) 
  • A white solid
  • A colourless liquid
  • A gas
  • A bright yellow solid
An organic compound X on treatment with acidified K2Cr2O7 gives a compound Y which reacts with I2 and sodium carbonate to form tri-iodomethane. The compound X is 
  • CH3OH
  • CH3COCH3
  • CH3CHO
  • CH3CH(OH)CH3
Which of the following statement is correct?
  • Phenol is less acidic than ethyl alcohol
  • Phenol is more acidic than ethyl alcohol
  • Phenol is more acidic than carboxylic acid
  • Phenol is more acidic than carbonic acid
The reagent used for the dehydration of an alcohol is 
  • Phosphorus pentachloride
  • Calcium chloride
  • Aluminium oxide
  • Sodium chloride
The compound which gives the most stable carbonium ion on dehydration is 
Sodium ethoxide is a specific reagent for
  • Dehydration
  • Dehydrogenation
  • Dehydrohalogenation
  • Dehalogenation
Dehydrogenation of gives
1763367_0f6db15de9804aae99803c5ca9c41d31.png
  • Acetone
  • Acetaldehyde
  • Acetic acid
  • Acetylene
Which of the following statements is correct regarding case of  dehydration in alcohols?
  • Primary > Secondary
  • Secondary > Tertiary
  • Tertiary > Primary
  • None of these
Phenol at 250c is 
  • A white crystalline solid
  • A transparent liquid
  • A gad
  • yellow solution
Maximum solubility of alcohol in water is due to
  • Covalent bond
  • Ionic bond
  • H-bond with H2O
  • None of the above
The best method to prepare cyclohexene from cyclohexanol is by using 
  • Conc. HCl + ZnCl
  • Conc. H3PO4
  • HBr
  • Conc. HCl
The product of acid catalyzed hydration of 2-phenyl propene is
  • 3-phenyl-2-propanol
  • 1-phenyl-2-propanol
  • 2-phenyl-2-propanol
  • 2-phenyl-1-propanol
Propylene on hydrolysis with sulphuric acid forms
  • n-propyl alcohol
  • Isopropyl alcohol
  • Ethyl alcohol
  • Butyl alcohol
Ether which is liquid at room temperature is
  • C2H5OCH3
  • CH3OCH3
  • C2H5OC2H5
  • None of these
In which of the following reaction, phenol or sodium phenoxide is not formed:
  • C6H5N+2Cl+alc.KOH
  • C6H5OCl+NaOH
  • C6H5OCl+aq.NaOH
  • C6H5N+2Cl H2OΔ
The reaction shown is the example of:
1765757_e510602fa25549eba7b88f165e093b52.png
  • Sulphonation
  • Dehydration
  • Alkylation
  • Decomposition
Ethyl hydrogen sulphate is obtained by the reaction of H2SO4 on
  • Ethylene
  • Ethane
  • Ethyl chloride
  • Ethanol
Which will dehydrate easily?
  • 3-methyl-2-butanol
  • Ethyl alcohol
  • 2-methyl propane-2-ol
  • 2-methyl butanol
Which of the above paths is/are feasible for the preparation of ether(E)?
1769103_5e27014f14cd49318f7846200b10ac38.png
  • Path I is feasible.
  • Path II is feasible.
  • Both paths are feasible.
  • None is feasible.
The only alcohol that can be prepared by the indirect hydration of alkene is
  • Ethyl alcohol
  • Propyl alcohol
  • Isobutyl alcohol
  • Methyl alcohol
Given :
1768915_43ba2d9edbb64b799004038826847c54.png
Which of the following statements is/are correct?
  • Phenol is more easily oxidised than benzene.
  • Benzaldehyde and PhCl can be distinguished by NaHSO3
  • pCresol and benzoic acid can be distinguished by NaOH
  • Phenol and benzoic acid can be distinguished by adding fry ice aqueous NaOH solution.

1768042_a18796163cca45d9bf5ae939552c57cb.png
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Both Assertion and Reason is incorrect
The products (A) and (B) are:
1771512_d61d7b776ad94e138f6de98cdfd73907.png
Which of the following is the best synthesis of the ether (A) shown below:
1770554_918013e5f9314b3ca82fe514d086584d.png
  • PhOPHHNO3+H2SO4(Dinitration)
Monochlorination of toluene in sunlight followed by hydrolysis with aq. NaOH yields.
  • o-Cresol
  • m-Cresol
  • 2, 4-Dihydroxytoluene
  • Benzyl alcohol
Which of the following reactions will yield phenol?
0:0:2


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