CBSE Questions for Class 12 Medical Chemistry Alcohols, Phenols And Ethers Quiz 5 - MCQExams.com

Which of the following alcohols forms a ketone when oxidized?
  • 1-Propanol
  • Methanol
  • 2-Methyl-2-propanol
  • 2-Propanol
The bond angle of the bond $$C-O-C$$ in methoxy methane is:
  • $$111.7$$
  • $$109$$
  • $$108.9$$
  • $$180$$
In iodine charge transfer test the color of ether compound formed is:
  • blue
  • pale yello
  • brown
  • dark red
Which of the following is the functional group of an ether?
  • $$R - OH$$
  • $$R - O - R$$
  • $$R-CO-R'$$
  • $$R-COOH$$
  • $$RCHO$$
$$CH_3OH\xrightarrow{P+I_2}A  \xrightarrow{Mg/dry\ ether}B\xrightarrow{HCHO}C\xrightarrow{{H^+/H_2O}}D$$

What are $$B$$ & $$D$$ respectively?
  • $$CH_3MgI$$, $$CH_3CHO$$
  • $$CH_3MgI$$, $$CH_3CH_2OH$$
  • $$CH_3MgI$$, $$CH_3COOH$$
  • $$CH_3MgI$$, $$CH_3COCH_3$$
Which of the following can not be formed by hydrolysis of alkenes?
  • Methanol
  • Ethanol
  • Propanol
  • None of these
On treatment with dilute $$H_2SO_4$$, ethene forms ethanol.
  • True
  • False
Hydrogen chloride and $$SO_2$$ are the side products in the reaction of ethanol with thionyl chloride. Which of the following is the main product in this reaction?
  • $$C_2H_5OC_2H_5$$
  • $$C_2H_6$$
  • $$CH_3Cl$$
  • $$C_2H_5Cl$$
Which of the following is used in the manufacture of ethanol?
  • $$C_2H_6$$
  • $$C_2H_2$$
  • $$CH_4$$
  • $$C_2H_4$$
What type of spectroscopy would be the best tool to analyze a clear and colorless solution for the presence of a functional group like an alcohol group $$(-OH)$$?
  • UV spectroscopy.
  • IR spectroscopy.
  • Mass spectroscopy.
  • Photoelectron spectroscopy.
Phenol is a:
  • crystalline solid
  • amorphous solid
  • volatile liquid
  • nonvolatile liquid
What are X and Y respectively in the following reaction?
$$\displaystyle X \xrightarrow[]{PBr_3} C_2H_5Br \xrightarrow[\Delta]{AgOH}Y$$
  • $$CH_3OH, C_2H_6$$
  • $$C_2H_5OH, C_2H_5AgBr$$
  • $$CH_3COOH, CH_3CH_2OH$$
  • $$C_2H_5OH, C_2H_5OH$$
An industrial method for the preparation of methanol is:
  • by catalytic reduction of carbon monoxide
  • by reacting methane with steam in presence of a catalyst
  • by reduction of $$HCHO$$ with $$LiAlH_4$$
  • by reduction of $$HCHO$$ with aqueous $$NaOH$$
The distillation of rectified spirit gives absolute ethanol.
  • True
  • False
Methanol can be prepared when :
  • iodomethane is heated with moist silver oxide
  • iodomethane react with sodium in the presence of ether
  • both A and B
  • none of these
Phenol is soluble in water because :
  • it is a nonpolar compound
  • it forms complex with water
  • it forms hydrogen bond with the water
  • phenol is not soluble in water
Dehydration of alcohol is an example of which type of reaction?
  • Substitution
  • Elimination
  • Addition
  • Both $$B$$ and $$C$$

The IUPAC name of:
582585.png
  • 2, 1-dimethyl-1, 3-butanol
  • 4,4-dimethyl-2-pentanol
  • 4-methyl-2, 4-pentanol
  • 1, 3, 3-trimethyl-1, 3-propanol
Which of the following is not true regarding phenol?
  • Pure phenol is a white crystalline solid
  • Phenol smell as disinfectant.
  • It causes immediate white blistering to the skin
  • None of these
Melting point of phenol is:
  • $$95^0$$C
  • $$43^0$$C
  • $$20^0$$C
  • $$10^0$$C
Which of the following compound is most acidic?
  • $$Cl-CH_2-CH_2-OH$$
Melting point of phenol is :
  • $$53^0C$$
  • $$43^0C$$
  • $$33^0C$$
  • $$23^0C$$
Molecular weight of phenol is :
  • $$94.11$$
  • $$104.11$$
  • $$86.11$$
  • $$98$$
Methanol is called as Marine Methanol beacuse:
  • it is an essential compound for marine life
  • it is mostly obtained from deep sea bed
  • it is used as a marine fuel
  • it serves as a signal indicator for big ships on burning
Reagents used for industrial preparation of methanol are:
  • $$CO+H_2$$
  • $$HCHO+H_2$$
  • $$CO_2+H_2$$
  • $$HCOOH+H_2$$
Common name for methanol is:
  • volemitol
  • rubbing alcohol
  • wood spirit
  • xylitol
Destructive distillation of wood in the laboratory will result in the formation of :
  • Ethanol
  • Methane
  • Methanol
  • Butane
The other name for Syngas is:
  • Producer gas
  • Water gas
  • Tear gas
  • Fuel gas
The major product of Raschig process was taken for litmus test.It was observed that it turned:
  • red litmus blue
  • blue litmus red
  • no change in colour
  • very slight change in colour from red towards blue
Ether is formed when alkyl halide is treated with sodium alkoxide. This method is known as:
  • Hoffmann reaction
  • Williamson synthesis
  • Wurtz synthesis
  • Kolbe's reaction
What is the $$IUPAC$$ name of the following compound?

$$CH_{3} - CH_{2} - CH_{2} - OH$$
  • Propan-1-ol
  • Propan-2-ol
  • Propane-1-ol
  • Ethane-2-ol
Which of the following alcohol has highest solubility in water ?
  • Tertiary butyl alcohol
  • Secondary butyl alcohol
  • Ethylene glycol
  • Glycerol
When alkyl halide is heated with dry $${ Ag }_{ 2 }O$$, it produces:
  • ester
  • ether
  • ketone
  • alcohol
What is the formula of tertiary butyl acohol?
  • $$CH_{3} - CH(CH_{3}) - CH_{2} - OH$$
  • $$CH_{3} - (CH_{2})_{2}OH$$
  • $$CH_{3} - CH(OH) - CH_{2} - CH_{3}$$
  • $$(CH_{3})_{3}  C - OH$$
In which of the following reactions of alcohol there is no cleavage of C-O bond ?
  • Dehydration reaction of alcohol
  • Oxidation reaction of alcohol
  • Reduction reaction of alcohol
  • Reaction of alcohol with phosphorus tribromide
Which of the following statement is not correct ?
  • Phenol is neutralised by sodium carbonate
  • Phenol is used to prepare analgesic drugs
  • Solubility of phenol in water is more than that of chlorobenzene
  • Boiling point of o-nitrophenol is lower than that of p-nitrophenol
Which of the following represents monohydric alcohol?
  • $$C_nH_{2n}OH$$
  • $$C_nH_{2n+1}OH$$
  • $$C_nH_{n}O$$
  • $$C_nH_{n}OH$$
Which of the following compounds decolourizes aqueous bromine and gives white fumes of $$HCl$$ on reaction with $$PCl_{5}$$?
  • $$CH_{3}COCH_{2}CH - CH_{2}$$
  • $$CH_{3}CH_{2}CH_{2}CH_{2}CH_{3}$$
  • $$CH_{3}CH = CHCH_{2}CH_{2}OH$$
  • $$CH_{3}OCH_{2}CH_{2}CH_{2}CH_{2}OH$$
Diols (I - IV) which react with $$CrO_{3}$$ in aqueous $$H_{2}SO_{4}$$ and yield products that readily undergo decarboxylation on heating are:
878147_ce2bb754f6ae48229fdcc87784d2da74.png
  • I and II
  • II and III
  • II and IV
  • I and IV
Which of the following is most soluble in water ?
  • n- butyl alcohol
  • Iso-butyl alcohol
  • Tertiary butyl alcohol
  • None of the above
Dehydration of alcohol is an example of which type of reaction ?
  • Substitution reaction
  • Elimination reaction
  • Rearrangement reaction
  • Addition reaction
Consider the given reaction:
$$\displaystyle CH_3-CH=CH-CH_2-OH \overset{HBr}{\underset{S_N 1}{ \longrightarrow}} [P]$$

In the given reaction the product $$[P]$$ is:
  • $$CH_3-CH=CH-CH_2-Br$$
  • $$CH_3 - \!\!\overset{\,\,\,Br}{\overset{|}{C}}\!\!H - CH = CH_2$$
  • $$CH_2=CH-CH=CH_2$$
  • $$CH_3 - \overset{\,\,\,Br}{\overset{|}{C}}\!\!H - CH_2 - CH_2 - OH$$

The order of reactivity of the following alcohols towards conc. $$HCl$$ is:
705495_1260a2a487884efea65b06dc18bd6188.png
  • $$I> II> III> IV$$
  • $$I> III> II> IV$$
  • $$IV> III> II> I$$
  • $$IV> III> I> II$$
What is the hybridisation of carbon and oxygen in electronic structure of ether?
  • $$sp^{3}$$ and $$sp^{2}$$
  • $$sp^{3}$$ and $$sp^{3}$$
  • $$sp$$ and $$sp$$
  • $$sp^{2}$$ and $$sp^{2}$$
Which is the only alcohol that can be prepared by the indirect hydration of alkene?
  • Ethyl alcohol

  • Propyl alcohol
  • Isobutyl alcohol
  • Methyl alcohol
The IUPAC name for the compound given below is:
782211_2f81d479606e416da81fd53f8a14b95b.jpg
  • $$(2R, 3Z)$$ - 7 - phenylhept - 3- en - 2 - ol
  • $$(2S, 3Z)$$ - 7 - phenylhept - 3- en - 2 - ol
  • $$(2R, 3E)$$ - 7 - phenylhept - 3- en - 2 - ol
  • $$(2S, 3E)$$ - 7 - phenylhept - 3- en - 2 - ol
Among the following compounds, the one which can be dehydrated most easily is:
  • $$CH_{ 3 }-CH_{ 2 }-\overset { \overset { CH_{ 3 } }{ | }  }{ \underset { \underset { OH }{ | }  }{ C }  }-CH_{ 2 }CH_{ 3 }$$
  • $$CH_3-CH_2-CH_2-\underset { \underset { OH }{ | }  }{ C } H-CH_3$$
  • $$CH_3-CH_2-CH_2-CH_2-CH_2-OH$$
  • $$(CH_3)_2CH-CH_2-CH(OH)-CH_3$$
 Which of the following statements is incorrect regarding preparation of alcohols?
  • Aldehydes and Ketones on catalytic reduction by [H] give primary alcohol and secondary alcohol respectively
  •  Ketones on reaction with Grignard’s reagent gives tertiary alcohol
  • Aldehydes on reaction with Grignard’s reagent gives primary or secondary alcohol
  • Alkyl halides on reaction alcoholic potash gives alcohol
Which of the following phenols has lowest solubility in water?
  • Phenol
  • o-Nitrophenol
  • m-Nitrophenol
  • p-Nitrophenol
An Alcohol X pass over Cu at 300C, then produced compound decolourised Bromine liquid, X is:
0:0:1


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