CBSE Questions for Class 12 Engineering Chemistry Alcohols,Phenols And Ethers Quiz 1 - MCQExams.com


The major product of the above reaction is :
1697375_8384697faba042e08bdd0c877350238e.png
Which of the following compounds will most readily be dehydrated to give alkene under acidic condition?
  • 2-Hydroxycyclopentanone
  • 1-Pentanol
  • 3-Hydroxypentan-2-one
  • 4-Hydroxypentan-2-one
Which of the following is not the product of dehydration of :
420802.png
Compound $$A, C_{8}H_{10}O$$, is found to react with $$NaOI$$ (produced by reacting $$Y$$ with $$NaOH$$) and yields a yellow precipitate with characteristic smell.
$$A$$ and $$Y$$ are respectively are:
The compound $$A$$ on treatment with $$Na$$ gives $$B$$, and with $$PCl_{5}$$ gives $$C. B$$ and $$C$$ react together to give diethyl ether. $$A, B$$ and $$C$$ are in the order.
  • $$C_{2}H_{5}Cl, C_{2}H_{6}, C_{2}H_{5}OH$$
  • $$C_{2}H_{5}OH, C_{2}H_{6}, C_{2}H_{5}Cl$$
  • $$C_{2}H_{5}OH, C_{2}H_{5}ONa, C_{2}H_{5}Cl$$
  • $$C_{2}H_{5}OH, C_{2}H_{5}Cl, C_{2}H_{5}ONa$$
The reaction can be classified as:
477405.png
  • williamson ether synthesis reaction
  • alcohol formation reaction
  • dehydration reaction
  • williamson alcohol synthesis reaction
Among the following sets of reaction which one produces anisole?
  • $$CH_3CHO; RMgX$$
  • $$C_6H_5OH; NaOH, CH_3I$$
  • $$C_6H_5OH; neutral FeCl_3$$
  • $$C_6H_5-CH_3; CH_3COCl; AlCl_3$$
Degree of unsaturation of $$A=2$$ and it contains no double or triple bonds. Identify the structure of A.
471058_2bee064c6b364de4aa75edb07f2e8421.png
  • None of these
  • 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.
  • Assertion and Reason both are incorrect.
The strongest acid among the following is:
  • o-methoxyphenol
  • m-methoxyphenol
  • p-methoxyphenol
  • phenol
How many structures of X is possible ?

1633710_4c15aa422d2a4ad8a27599206f7aa2dd.png
  • $$4$$
  • $$5$$
  • $$6$$
  • $$3$$
$$\left[ X \right] $$ is
712275_0a32e764d6b343048b0cc06b9db5f768.png
The compound which gets dissolved in water is :
  • $$C_{2}H_{6}$$
  • $$C_{2}H_{4}$$
  • $$C_{2}H_{2}$$
  • $$C_{2}H_{5}OH$$
  • $$C_{3}H_{8}$$
Methyl amine with nitrous acid gives
  • methyl alcohol
  • methyl nitrite
  • dimethyl ether
  • methyl nitrite and dimethyl ether
An ester can be prepared by the reaction of:
  • two alcohols
  • an alcohol and an aldehyde
  • an alcohol and an organic acid
  • an organic acid and an aldehyde
  • an acid and a ketone
A and B are -
146707.png
Ethyl ether when reacted with chlorine in dark yields
  • $${CH}_{3}CHClO{CH}_{2}{CH}_{3}$$
  • $${CH}_{3}{CH}_{2}O{CH}_{2}{CH}_{2}Cl$$
  • $$Cl{CH}_{2}{CH}_{2}O{CH}_{2}{CH}_{2}Cl$$
  • $${CH}_{3}CHClOCHCl{CH}_{3}$$
Molecular formula of ethanol is ?
  • $$C{H}_{3}OH$$
  • $${C}_{2}{H}_{4}{\left(OH\right)}_{2}$$
  • $${C}_{2}{H}_{5}OH$$
  • $$HCHO$$

The IUPAC name of the given acid is:
1463378_ab10b556b8d2455b8712f8f4798d7d32.png
  • 1, 2, 3-propane tricarboxylic acid
  • 3-hydroxy-1, 5-pentanendioic acid
  • 3-hydroxy-3-keto-1, 5-pentanedioic acid
  • 1, 3, 5-trihydroxypentane-1, 5-dione
Identify the compound $$'Y"$$ in the following sequence of reaction:
$$HC \equiv CH \xrightarrow[ii) H_2O/Zn]{i) O_3} X \xrightarrow{Zn/CH_3COOH} Y$$
  • $$CH_{3}COOH$$
Which of the following cannot be dissolved in alcohol?
  • Dyes and drugs
  • Soaps and varnishes
  • Resins and varnishes
  • Rubber and plastics
The IUPAC name of the compound is
1186044_876e501ae9264498a3c0420d02ab0648.JPG
  • 1, 1-Dimethyl-3-cyclohexanol
  • 1, 1-Dimethyl-3-hydroxycyclohexane
  • 3,3-Dimethyl-1-cyclohexanol
  • 3, 3-Dimethyl-1-hydroxycyclohexane

.How many number of compounds, which have same IUPAC name? 


1384649_7fbf0d1bf89048eab0329ed32577c069.PNG
  • $$0$$
  • $$1$$
  • $$2$$
  • $$3$$
The IUPAC name is:

25468_d27fc957516b48769a58f23fbe296a90.png
  • 2-ethyl-2-butanol
  • 3-Methyl-3-pentanol
  • 3-ethyl-3-methyl-3-pentanol
  • 1,1-diethyl ethanol
IUPAC name of the tertiary butyl alcohol is:
  • 1-butanol
  • 2-butanol
  • 2-methyl-1-propanol
  • 2-methyl-2-propanol
The correct IUPAC name of the compound is:

25229.jpg
  • Isopropyl butanol
  • 2-methylbutane-3,4-diol
  • 3-methylbutane-1,2-dial
  • 3-methylbutane-1,2-diol

The IUPAC name of the compound is:

25471_d6dfdf3347594deeb1775ebc00fea63c.png
  • 1 - dimethylbutane - 1, 3 - diol
  • 1, 3, 3 -trimethylpropane - 1, 2 -diol
  • 2 - methylpentane - 2, 4 - diol
  • 1, 3, 3 -trimethylpropane - 1, 3 -dial
2-methyl pentane-1-ol is a:
  • $$1^{0}$$alcohol
  • $$2^{0}$$alcohol
  • $$3^{0}$$alcohol
  • none of the above
$$CH_3-CH_2-\overset{OH}{\overset{|}{C}H}-CH_2-CH_2-\underset{CH_3}{\underset{|}{C}H}-CH_2-CH_3$$
The IUPAC name of the compound is:
  • 6-methyl-3-hexanol
  • 6-Methyl-3-octanol
  • 1-methyl-4-hexanol
  • 4-methyl-1-octanol
Which of the following is a tertiary alcohol?
  • $$(CH_{3})_{2}CHCH_{2}OH$$
  • $$CH_{3}CH_{2}CH_{2}CH_{2}OH$$
  • $$CH_{3}CH_{2}CH_{2}OH$$
  • $$(CH_{3})_{3}COH$$
The IUPAC name is:

25355_2e1da9b57e0d472b8e323344bde05584.png
  • 2, 4 -dimethyl  pentan-2-ol
  • 2, 4 - dimethyl pentan-4-ol
  • 2, 2 - dimethyl butan-2-ol
  • butan-2-ol
The IUPAC name of $$(CH_{3})_{2}CHCH_{2}CH_{2}OH$$ is:
  • 3-Methyl butan-1-ol
  • 2-methyl pentan-1-ol
  • 3-ethyl pentan-1-ol
  • 2-ethyl butan-1-ol
IUPAC name of the following compound is:

$$CH_{3}-CH(C_{2}H_{5})-CH_{2}-CH(OH)-CH_{3}$$ 
  • 4-Methyl -2- hexanol
  • 4-ethyl -2- pentanol
  • 2-ethyl -2- pentanol
  • 3-methylhexanol
$$CH_2OH$$ 
$$|$$
$$CH_2OH$$ is a :
  • $$1^{0}$$ alcohol
  • $$2^{0}$$ alcohol
  • $$3^{0}$$ alcohol
  • carbinol
The gas liberated during fermentation is:
  • alcoholic vapours
  • $$H_2$$
  • $$CO$$
  • $$CO_{2}$$
Which of the following soluble in water?
  • $$CH_{3}OH$$
  • $$CHCl_{3}$$
  • $$CCl_{4}$$
  • $$CS_{2}$$
Enzymes involved used in the fermentation of cane sugar to alcohol?
  • Diastase, invertase
  • Invertase, zymase
  • Diastase, zymase
  • Maltase, zymase
$$C_{2}H_{5}OH\rightarrow C_{2}H_{5}Br$$

In this conversion, the reagent is:
  • $$HBr$$
  • $$Br_{2} + CCl_{4}$$
  • $$Br_{2}$$ water
  • $$KBr$$
Which group can be completely displaced by a halogen group?
  • Hydroxyl group(OH)
  • Aldehyde $$(-CHO)$$ group
  • Nitro $$(-NO_{2})$$ group
  • Keto $$(C=O)$$ group
The IUPAC name of sec. butyl alcohol is:
  • 1-butanol
  • 2-butanol
  • 2-methyl-l-butanol
  • 2-methyl-2-butanol
Which alcohol is prepared from water gas?
  • $$C_{2}H_{5}OH$$
  • $$CH_{3}CH_{2}CH_{2}OH$$
  • $$CH_{3}OH$$
  • $$C_{6}H_{5}CH_{2}OH$$
Which one of the following reagents can not cause $$C- O$$ bond fission in alcohols?
  • $$HCl /ZnCl_{2}$$
  • $$PCl_{5}$$
  • $$SOCl_{2}$$
  • Sodium
An example for a polyhydric alcohol is:
  • methyl alcohol
  • neopentyl alcohol
  • sec butyl alcohol
  • mannitol

The structure of compound P is :



72512.jpg
The correct acidic order of following is:
70906_870cdc5bb4294d529c1103a2b7904dc8.png
  • I > II > III
  • III > I > II
  • II > III > I
  • I > III > II
The most suitable method of separation of equal ($$1:1$$) mixture of ortho-nitrophenol and para-nitrophenol is:
  • Crystallisation
  • Distillation
  • Sublimation
  • Chromatography
On reacting with grignard reagent acetone gives?
  • $$1^0 alcohol$$
  • $$2^0 alcohol$$
  • $$3^0 alcohol$$
  • None of these
Phenol reacts with bromine water in carbon disulphate at low temperature to give
  • o-bromophenol
  • o- and p-bromophenols
  • p-bromophenol
  • 2, 4, 6-tribromophenol
The compound in which hydrogen bonding is not possible is:
  • $$CH_{3}OCH_{3}$$
  • $$CH_{3}CH_{2}OH$$
  • $$H_{2}O$$
  • $$CH_{3}COOH$$
Hydrolysis of an ester gives acid A and alcohol B. The acid reduces Fehlings solution. Oxidation of alcohol B gives acid A. The ester is:
  • Mehthyl formate
  • Ethyl formate
  • Methyl acetate
  • Ethyl acetate
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