Tamil Nadu Board of Secondary EducationHSC Science Class 12

Tamil Nadu Board Samacheer Kalvi solutions for Class 12th Chemistry Volume 1 and 2 Answers Guide chapter 11 - Hydroxy Compounds and Ethers [Latest edition]

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Tamil Nadu Board Samacheer Kalvi solutions for Class 12th Chemistry Volume 1 and 2 Answers Guide chapter 11 - Hydroxy Compounds and Ethers - Shaalaa.com
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Solutions for Chapter 11: Hydroxy Compounds and Ethers

Below listed, you can find solutions for Chapter 11 of Tamil Nadu Board of Secondary Education Tamil Nadu Board Samacheer Kalvi for Class 12th Chemistry Volume 1 and 2 Answers Guide.


Evaluation
Evaluation [Pages 139 - 143]

Tamil Nadu Board Samacheer Kalvi solutions for Class 12th Chemistry Volume 1 and 2 Answers Guide Chapter 11 Hydroxy Compounds and Ethers Evaluation [Pages 139 - 143]

Choose the correct answer:

Evaluation | Q 1. | Page 139

An alcohol (x) gives blue colour in Victormeyer’s test and 3.7 g of X when treated with metallic sodium liberates 560 mL of hydrogen at 273 K and 1 atm pressure what will be the possible structure of X?

  • CH3CH(OH)CH2CH3

  • CH3 – CH(OH) – CH3

  • CH3 – C(OH) (CH3)2

  • CH3 – CH2 – CH(OH) – CH2 – CH3

Evaluation | Q 2. | Page 139

Which of the following compounds on reaction with methyl magnesium bromide will give tertiary alcohol.

  • benzaldehyde

  • propanoic acid

  • methyl propanoate

  • acetaldehyde

Evaluation | Q 3. | Page 139

The X is

  • None of these

Evaluation | Q 4. | Page 139

In the reaction sequence, \[\ce{Ethene ->[HOCl] A ->[X] ethan-1, 2-diol}\]. A and X respectively are ____________.

  • Chloroethane and NaOH

  • ethanol and H2SO4

  • 2-chloroethane -1-ol and NaHCO3

  • ethanol and H2O

Evaluation | Q 5. | Page 139

Which one of the following is the strongest acid.

  • 2-nitrophenol

  • 4-chlorophenol

  • 4-nitrophenol

  • 3-nitrophenol

Evaluation | Q 6. | Page 139

on treatment with Con. H2SO4 predominately gives

Evaluation | Q 7. | Page 140

Carbolic acid is ____________.

  • Phenol

  • Picric acid

  • benzoic acid

  • phenylacetic acid

Evaluation | Q 8. | Page 140

Which one of the following will react with phenol to give salicylaldehyde after hydrolysis.

  • Dichloro methane

  • trichloroethane

  • trichloro methane

  • CO2

Evaluation | Q 9. | Page 140

\[\ce{(CH3)3 - C - CH(OH) CH3 ->[con H2SO4] X (major product)}\]

  • (CH3)3 CCH = CH2

  • (CH3)2 C = C (CH3)2

  • CH2 = C(CH3)CH2 – CH2 – CH3

  • CH2 = C (CH3) – CH2 – CH2 – CH3

Evaluation | Q 10. | Page 140

The correct IUPAC name of the compound,

\[\begin{array}{cc}
\ce{CH3}\phantom{.....}\\
|\phantom{........}\\
\ce{H3C - CH - CH - CH - CH2 - OH}\\
\phantom{}|\phantom{............}|\phantom{........}\\
\phantom{}\ce{Cl}\phantom{..........}\ce{CH3}\phantom{......}
\end{array}\]

  • 4-chloro-2, 3-dimethyl pentan-1-ol

  • 2, 3-dimethyl-4-chloropentan-1-ol

  • 2, 3, 4-trimethyl-4-chlorobutan-1-ol

  • 4-chloro-2, 3, 4-trimethyl pentan-1-ol

Evaluation | Q 11. | Page 140

Assertion: Phenol is more acidic than ethanol.

Reason: Phenoxide ion is resonance stabilized.

  • both assertion and reason are true and reason is the correct explanation of assertion.

  • both assertion and reason are true but reason is not the correct explanation of assertion.

  • assertion is true but reason is false.

  • both assertion and reason are false.

Evaluation | Q 12. | Page 140

In the reaction \[\ce{Ethanol ->[PCl5] X ->[alc. KOH] Y ->[H2SO4/H2O][298 K] Z}\]. The ‘Z’ is

  • ethane

  • ethoxyethane

  • ethylbisulphite

  • ethanol

Evaluation | Q 13. | Page 140

The reaction can be classified as

  • dehydration

  • Williamson alcohol synthesis

  • Williamson ether synthesis

  • dehydrogenation of alcohol

Evaluation | Q 14. | Page 141

Isopropyl benzene on air oxidation in the presence of dilute acid gives ___________.

  • C6H5COOH

  • C6H5COCH3

  • C6H5COC6H5

  • C6H5 – OH

Evaluation | Q 15. | Page 141

Assertion: Phenol is more reactive than benzene towards electrophilic substitution reaction

Reason: In the case of phenol, the intermediate arenium ion is more stabilized by resonance.

  • if both assertion and reason are true and reason is the correct explanation of assertion.

  • if both assertion and reason are true but reason is not the correct explanation of assertion.

  • assertion is true but reason is false.

  • both assertion and reason are false.

Evaluation | Q 16. | Page 141

HO CH2 CH2 – OH on heating with periodic acid gives ____________.

  • methanoic acid

  • Glyoxal

  • methanal

  • CO2

Evaluation | Q 17. | Page 141

Which of the following compound can be used as antifreeze in automobile radiators?

  • methanol

  • ethanol

  • Neopentyl alcohol

  • ethan-1, 2-diol

Evaluation | Q 18. | Page 141

The reaction is an example of

  • Wurtz reaction

  • cyclic reaction

  • Williamson reaction

  • Kolbe reaction

Evaluation | Q 19. | Page 141

One mole of an organic compound (A) with the formula C3H8O reacts completely with two moles of HI to form X and Y. When Y is boiled with aqueous alkali it forms Z. Z answers the iodoform test. The compound (A) is ___________.

  • propan-2-ol

  • propan-1-ol

  • ethoxy ethane

  • methoxy ethane

Evaluation | Q 20. | Page 141

Among the following ethers which one will produce methyl alcohol on treatment with hot HI?

  • \[\ce{(H3C)3 C - O - CH3}\]

  • \[\ce{(CH3)2 - CH - CH2 - O - CH3}\]

  • \[\ce{CH3 (CH2)3 - O - CH3}\]

  • \[\begin{array}{cc}
    \ce{CH3 - CH2 - CH - O - CH3}\\
    |\\
    \phantom{...}\ce{CH3}
    \end{array}\]

Evaluation | Q 21. | Page 141

Williamson's synthesis of preparing dimethyl ether is a/an ____________.

  • SN1 reactions

  • SN2 reaction

  • electrophilic addition

  • electrophilic substitution

Evaluation | Q 22. | Page 141

On reacting with neutral ferric chloride, phenol gives ____________.

  • red colour

  • violet colour

  • dark green colour

  • no colouration

Short Answer Questions:

Evaluation | Q 1. | Page 142

Identify the product(s) is/are formed when 1-methoxy propane is heated with excess HI. Name the mechanism involved in the reaction.

Evaluation | Q 2. | Page 142

Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.

Evaluation | Q 3. | Page 142

Suggest a suitable reagent to prepare secondary alcohol with the identical group using a Grignard reagent.

Evaluation | Q 4. | Page 142

What is the major product obtained when two moles of ethyl magnesium bromide is treated with methyl benzoate followed by acid hydrolysis.

Evaluation | Q 5. (i) | Page 142

Predict the major product, when 2-methyl-but-2-ene is converted into alcohol in the following method.

Acid catalysed hydration

Evaluation | Q 5. (ii) | Page 142

Predict the major product, when 2-methyl-but-2-ene is converted into alcohol in the following method.

Hydroboration

Evaluation | Q 5. (iii) | Page 142

Predict the major product, when 2-methyl-but-2-ene is converted into alcohol in the following method.

Hydroxylation using bayers reagent

Evaluation | Q 6. (i) | Page 142

Arrange the following in the increasing order of their boiling point and give a reason for your ordering.

Butan-2-ol, Butan-1-ol, 2-methyl propane-2-ol

Evaluation | Q 6. (ii) | Page 142

Arrange the following in the increasing order of their boiling point and give a reason for your ordering.

Propan-1-ol, propan-1, 2, 3-triol, propan-1, 3-diol, propan-2-ol

Evaluation | Q 7. | Page 142

Can we use nucleophiles such as NH3, CH3O for the Nucleophilic substitution of alcohols?

Evaluation | Q 8. | Page 142

Is it possible to oxidise t-butyl alcohol using acidified dichromate to form a carbonyl compound?

Evaluation | Q 9. | Page 142

What happens when 1-phenyl ethanol is treated with acidified KMnO4.

Evaluation | Q 10. | Page 142

Write the mechanism of acid catalysed dehydration of ethanol to give ethene.

Evaluation | Q 11. i) | Page 142

How is phenol prepared from chloro benzene?

Evaluation | Q 11. ii) | Page 142

How is phenol prepared from isopropyl benzene?

Evaluation | Q 12. | Page 142

Explain Kolbe’s reaction.

Evaluation | Q 13. | Page 142

Write the chemical equation for Williamson's synthesis of 2-ethoxy-2-methyl pentane starting from ethanol and 2-methyl pentan-2-ol.

Evaluation | Q 14. | Page 142

Write the structure of the aldehyde, carboxylic acid and ester that yield 4-methylpent-2-en-1-ol.

Evaluation | Q 15. | Page 142

What is metamerism?

Evaluation | Q 15. | Page 142

Give the structure and IUPAC name of metamers of 2-methoxy propane.

Evaluation | Q 16. i) | Page 142

How is the conversion effected benzyl chloride to benzyl alcohol?

Evaluation | Q 16. ii) | Page 142

How is the conversion effected benzyl alcohol to benzoic acid?

Evaluation | Q 17. i) | Page 143

Complete the following reaction.

\[\ce{CH3 - CH2 - OH ->[P Br3] A ->[aq. NaOH] B ->[Na] C}\]

Evaluation | Q 17. ii) | Page 143

Complete the following reaction.

\[\ce{C6H5 - OH ->[Zn dust] A ->[CH3Cl][Anhydrous AlCl3] B ->[acid KMnO4] C}\]

Evaluation | Q 17. iii) | Page 143

Complete the following reaction.

\[\ce{Anisole ->[{t}-butylchloride][AlCl3] A ->[Cl2/FeCl3] B ->[HBr] C}\]

Evaluation | Q 17. iv) | Page 143

Complete the following reaction.

Evaluation | Q 18. | Page 143

0.44 g of a monohydric alcohol, when added to methyl magnesium iodide in ether, liberates at STP 112 cm3 of methane with PCC the same alcohol form a carbonyl compound that answers the silver mirror test. Identify the compound.

Evaluation | Q 19. i) | Page 143

Complete the following reaction.

Evaluation | Q 19. ii) | Page 143

Complete the following reaction.

\[\ce{C6H5 - CH2CH(OH)CH(CH3)2 ->[conc. H2SO4]}\]

Evaluation | Q 20. | Page 143

Phenol is distilled with Zn dust followed by Friedel-crafts alkylation with propyl chloride to give a compound B, B on oxidation gives (c) Identify A, B and C.

Evaluation | Q 21. | Page 143

Identify A, B, C, D and write the complete equation.

Evaluation | Q 22. | Page 143

What will be the product (X and A) for the following reaction

\[\ce{acetylchloride ->[i) CH3MgBr][ii) H3O^+] X ->[acid K2Cr2O7] A}\]

Evaluation | Q 23. | Page 143

How will you convert acetylene into n-butyl alcohol?

Evaluation | Q 24. | Page 143

Predict the product A, B, X and Y in the following sequence of reaction.

Evaluation | Q 25. | Page 143

3, 3-dimethyl butane-2-ol on treatment with conc. H2SO4 to give tetramethyl ethylene as a major product. Suggest a suitable mechanism.

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Solutions for Chapter 11: Hydroxy Compounds and Ethers

Evaluation
Tamil Nadu Board Samacheer Kalvi solutions for Class 12th Chemistry Volume 1 and 2 Answers Guide chapter 11 - Hydroxy Compounds and Ethers - Shaalaa.com

Tamil Nadu Board Samacheer Kalvi solutions for Class 12th Chemistry Volume 1 and 2 Answers Guide chapter 11 - Hydroxy Compounds and Ethers

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Concepts covered in Class 12th Chemistry Volume 1 and 2 Answers Guide chapter 11 Hydroxy Compounds and Ethers are Classification of Alcohols, IUPAC Nomenclature, Reactions of Benzene Ring, Preparation of Ethers from Dehydration of Alcohols and Williamson Systhesis.

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