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12th Chemistry Monthly Test - 2 ( Hydroxy Compounds and Ethers )

St. Britto Hr. Sec. School - Madurai

12th Chemistry Monthly Test - 2 ( Hydroxy Compounds and Ethers )-Aug 2020

Time : 2.30 Hours

Part - A

Generic 2 - Answer All Question

What happens when phenol is treated with diazonium chloride in presence of NaOH?(OR) Give a brief account of coupling reaction.

Give chemical test to distinguish between methanol and phenol.

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

How are the following conversions effected
i) benzylchloride to benzylalcohol
ii) benzyalalcohol to benzoic acid

Write the mechanism of acid catalysed dehydration of ethanol to give ethane.
What is the major product obtained when two moles of ethyl magnesium bromide is treated with methyl benzoate followed by acid hydrolysis.

Give reasons: Methanol is miscible with water while iodo-methaneis not.

How will you convert C₂H₅OH to C₂H₅OC₂H₅?

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

Phenols does not give protonation reactions readily-Give reason.

How will you convert acetylene into n-butyl alcohol?

Why is glycol more viscous than ethanol?

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

What will be the product for the following reaction
\(acetylchloride\xrightarrow [ (ii){ H }_{ 3 }{ O }^{ + } ]{ (i){ CH }_{ 3 }MgBr } X\xrightarrow { acid{ K }_{ 2 }{ Cr }_{ 2 }{ O }_{ 7 } } A\)
Identify X and A

What happens when crotonaldehyde is reduced in the presence of LiAIH₄?

Explain why phenol does not undergo substitution of the -OH group like alcohol.

How is the following conversion effected?
Ethyl alcohol \(\longrightarrow\) Eylene glycol

What is 'Glycerose'? How is it prepared from glycerol?

Why sodium metal cannot be used to dry alcohols but it can be used to dry ethers?

Explain 'esterification' reaction with an example.

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 silver mirror test. Identify the compound.

Arrange the following in the increasing order of their boiling point and give a reason for your ordering
(i) Butan - 2- ol, Butan -l-ol, 2 - methylpropan -2-ol
(ii) Propan -l-ol, propan -1,2,3-triol, propan -1,3 - diol, propan -2-ol
Can we use nucelophiles such as NH₃,CH₃O for the Nucleophilic substitution of alcohols

Explain Schotten -Baumann reaction.

How will you convert of ethylene glycol to 1,4-dioxan.

What happens when anisole is nitrated?

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

Part - B

Generic 5 - Answer All Question

How would you distinguish between (i) methyl alcohol and ethyl alcohol (ii) benzyl alcohol and
phenol, (iii) ethyl alcohol and benzyl alcohol?

What is major product formed when 3,3~dimethyl-2-butanol is heated in the presence of H₂SO₄•

Write all possible isomers with molecular formula C₄H₁₀O and name them.

What are ethers? Write note on simple and mixed ethers with examples.

Explain the mechanism involved in the intermolecular dehydration of alcohols to give ethers.
Explain auto-oxidation of ether.

How will you distinguish the primary, secondary and tertiary alcohols by Victor Meyer's method?

Starting from phenol how would you obtain the following compounds?
(a) I, 4-benzo quinone,
(b) picric acid,
(c) Anisole?

Distinguish between (a) Ethanol and phenol (b) Phenol and acetic acid (c) Phenol and aniline
(d) Phenol and anisole.

Give short notes on the following:·(a) Kolbe,s reaction, (b) Riemer- Tiemann reaction

Give any five chemical differences between aromatic ether and an aliphatic ether.

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