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12th Chemistry Monthly Test - 3 ( Hydroxy Compounds and Ethers )

St. Britto Hr. Sec. School - Madurai

12th Chemistry Monthly Test - 3 ( Hydroxy Compounds and Ethers )-Aug 2020

Time : 2.30 Hours

Part - A

Generic 2 - Answer All Question

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.

Explain Schotten -Baumann reaction.

Why is glycol more viscous than ethanol?

Name the only primary alcohol which gives positive iodoform test.

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.
Explain Kolbe’s reaction.

What happens when anisole is nitrated?

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

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

Phenols does not give protonation reactions readily-Give reason.

Give the IUPAC names of
(i) CH₃CH(OH)CH₂OH
(ii) HO-CH₂- CH₂-OH
(iii) \( { CH }_{ 3 }-\underset { |\\ OH }{ CH } -{ COOH }\)

Preparation of ethers by intermolecular dehydration of alcohols ·in the presence of an acid is not a suitable method for mixed ethets. Give reason.

How will you convert C₂H₅OH to C₂H₅OC₂H₅?

State Saytzeff's rule.

How will you convert acetylene into n-butyl alcohol?

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.

Part - B

Generic 3 - Answer All Question

How does glycerol react with KHSO₄?

Write a note on Friedel Crafts reaction of anisole.

How is glycerol obtained commercially? State its uses.
Account for the following: (i) Phenol has a smaller dipole moment than methanol, (ii) Phenols do not give protonation reaction readily.

Give chemical tests to distinguish between propan-2-ol and 2-methyl-propan-2-ol.

Completethefollowingequations by writing the missing A,B,C,D etc.,

How do ethers react with HI? Give the significances of the reaction.

Ethers should not be heated to dryness. Why? (OR) How does diethyl ether react with oxygen?

Account for the following: (i) Phenol has a smaller dipole moment than methanol (ii) Phenols do not give protonation reaction readily.

What are the oxidation products of glycerol?

Explain Swern oxidation of propan-2-ol to propanane.

Part - C

Generic 5 - Answer All Question

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

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

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

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

Explain auto-oxidation of ether.

Give any five chemical differences between aromatic ether and an aliphatic ether.
Write all possible isomers with molecular formula C₄H₁₀O and name them.

Explain the mechanism involved in the intermolecular dehydration of alcohols to give ethers.

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

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