When mixed ethers in which primary or secondary alkyl group is present is treated with one mole of HI , the iodide ion $\left( I ^{-}\right)$goes to which alkyl group and why?
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27 Q→05M.C.Q (1 Marks)
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Alcohols, Phenols and Ethers questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Name the product formed by the reaction of $CH _3 OC _2 H _5$ with HI.
View full solution →Write the reaction of $t$-butyl methyl ether with conc. HI and also explain its mechanism.
View full solution →Write the equation involved in Friedel Crafts reaction of phenol.
An organic compound $X \left( C _4 H _{10} O \right)$ reacts with HCl giving a compound $Y \left( C _4 H _9 Cl \right)$ which on reduction gives butane. Oxidation of compound $X$ gives carbonyl compound $Z$ and then the carboxylic acid of the same number of carbons formed. Give the formula of $X, Y, Z$ and $P$ and also write the reaction sequence.
View full solution →Give reasons :
(i) Carbon-oxygen bond length in phenol is slightly less than that of methanol.
(ii) The $C - O - C$ bond angle present in ether is greater than the tetrahedral angle.
(iii) The boiling point of isomeric alcohols decreases with increase in branching.
View full solution →(i) Carbon-oxygen bond length in phenol is slightly less than that of methanol.
(ii) The $C - O - C$ bond angle present in ether is greater than the tetrahedral angle.
(iii) The boiling point of isomeric alcohols decreases with increase in branching.
Give the equations of reaction of phenol with the following compounds:
(i) Benzene diazonium chloride
(ii) Acetone
(iii) Phthalic anhydride.
(i) Benzene diazonium chloride
(ii) Acetone
(iii) Phthalic anhydride.
Explain the following reaction of $C _2 H _5 OH$ :
(a) Schotten Baumann reaction
(b) Reaction with concen. $HNO _3$
(c) Reaction with excess of $NH _3$
(d) Reduction with Red P and HI
View full solution →(a) Schotten Baumann reaction
(b) Reaction with concen. $HNO _3$
(c) Reaction with excess of $NH _3$
(d) Reduction with Red P and HI
An organic compound gives hydrogen on reacting with sodium metal. It also gives iodofom test and the end product of its oxidation is ethanoic acid. Name the compound and give the equation of these reactions.
A compound (X) reacts with PCl5 to form compound Y. Compound Y reacts with ethereal solution of magnesium to form compound (Z), which on treating with propanone and further hydrolysis to give 2-Methyl propan-2-ol. What are the compounds X and Y and also give the equations of the reactions.
Give reason :
(i) The boiling point of ethanol is higher than that of hydroxymethane.
(ii) Phenol is a stronger acid than alcohol.
(iii) Ethanol easily dissolve in water.
(i) The boiling point of ethanol is higher than that of hydroxymethane.
(ii) Phenol is a stronger acid than alcohol.
(iii) Ethanol easily dissolve in water.
Write the reaction of phenol with the following :
(i) With $PCl _5$
(ii) With $NH _3$
(iii) Hinsberg reagent
(iv) Hydrogen.
View full solution →(i) With $PCl _5$
(ii) With $NH _3$
(iii) Hinsberg reagent
(iv) Hydrogen.
The product formed by the reaction of ethyl alcohol with conc. $H _2 SO _4$ depends on the reaction conditions. Explain this fact using different equations.
View full solution →Write the IUPAC name of isobutyl alcohol.
What is the chemical equation for the conversion of phenol to salicylic acid?
How will you distinguish between alcoholic - OH group and phenolic - OH group?
Arrange the following in the increasing order of their bond angles- $CH _3 OH , CH _3 OCH _3$ and $C _6 H _5 OH$.
View full solution →What is the order of reactivity of halogen acids with ethers?
Which is the correct increasing order of boiling points of the following compounds- $CH _3 OCH _3$, $CH _3 CH _2 OH$ and $CH _3 CH _2 CH _3$.
- A$CH _3 CH _2 OH < CH _3 OCH _3< CH _3 CH _2 CH _3$
- B$CH _3 CH _2 OH < CH _3 CH _2 CH _3< CH _3 OCH _3$
- ✓$CH _3 CH _2 CH _3< CH _3 OCH _3< CH _3 CH _2 OH$
- D$CH _3 CH _2 CH _3< CH _3 CH _2 OH < CH _3 OCH _3$
Answer: C.
View full solution →Which of the following is by-product in the reaction of obtaining phenol from cumene?
- ATribromophenol
- BBanoquinone
- CPicric acid
- ✓Acetone
Answer: D.
View full solution →Which of the following reaction is possible?
- ✓
- B
- CBoth (A) and (B)
- DNeither (A) nor (B)
Answer: A.
View full solution →The product of reaction when
- A
- ✓
- C
- DNone of the above
Answer: B.
View full solution →Which of the following alcohol has the maximum tendency to give hydrogen ions:
- A
- ✓
- C
- D
Answer: B.
View full solution →Write the chemical reactions of $C _2 H _5 OH$ with following compounds :
(i) $CH _2 N_2$ (diazomethane) (ii) ketone, (iii) $HC \equiv$ $C H$ (iv) $C H _3 N C O$ (Methyl-isocyanate) (v) $C H _3 C H O$ (ethanol) (vi) conc. $H _2 SO _4$ at $0^{\circ} C$.
View full solution →(i) $CH _2 N_2$ (diazomethane) (ii) ketone, (iii) $HC \equiv$ $C H$ (iv) $C H _3 N C O$ (Methyl-isocyanate) (v) $C H _3 C H O$ (ethanol) (vi) conc. $H _2 SO _4$ at $0^{\circ} C$.
Explain the following :
(i) Fermentation
(ii) Dehydration
(iii) Hydrogen bonding in alcohols.
(i) Fermentation
(ii) Dehydration
(iii) Hydrogen bonding in alcohols.
How will you obtain the following compounds from ethyl alcohol? Explain with equation :
(i) Diethyl ether
(ii) Iodoform
(iii) Ethyl acetate
(iv) Acetaldehyde
(i) Diethyl ether
(ii) Iodoform
(iii) Ethyl acetate
(iv) Acetaldehyde
Differentiate between $1^{\circ}, 2^{\circ}$ and $3^{\circ}$ alcohols by catalytic dehydrogenation.
View full solution →Explain the properties and uses of methanol and ethanol.
Glucose is converted to ethanol in presence of __________ enzyme.
In benzylic alcohols - OH group is bonded with _________ hybridised carbon.
In Williamson synthesis __________ reacts with sodium alkoxide to form dialkyl ether.
Out of o-nitrophenol and p-nitrophenol ___________ is less volatile.
Williamson synthesis used in the preparation of __________ .
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