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12th Chemistry Weekly Test - 1 (Hydroxy Compounds and Ethers )

St. Britto Hr. Sec. School - Madurai

12th Chemistry Weekly Test - 1 (Hydroxy Compounds and Ethers )-Aug 2020

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

An example of trihydric alcohol is__________.

trimethyl carbinol
3-hexanol
propane-1,2,3-triol
tert-butylacohol

Williamson's synthesis is an example of_________.

nucleophilic addition
electrophilic addition
electrophilic substitution
nucleophilic substitution

Williamson synthesis of preparing dimethyl ether is a / an /

SN¹ reactions
SN² reaction
electrophilic addition
electrophilic substitution

Which one of the following will react with phenol to give salicyladehyde after hydrolr.sis?

Dichlo methane
trichloroethane
trichloromethane
CO₂

In the reaction sequence, Ethane ethan -1, 2- diol. \(\xrightarrow { \quad HOCI\quad } A\xrightarrow { \quad X\qquad } \)A and X respectively are

Chloroethane and NaOH
ethanol and H₂SO₄
2 - chloroethan -1-ol and NaHCO₃
ethanol and H₂O

Ethyl alcohol cannot be used as a solvent for CH₃Mgl because
CH₃Mgl reacts with alcohol giving methane

the reaction between them is explosive in natrue

CH₃Mgl is converted to C₂H₅Mgl

alcohol is immicible with CH₃Mgl
Which one ofthe alcohol cannot be prepared by grignard reagent?
Methanol

ethanol

iso propyl alcohol

phenyl methanol

On oxidation of an alcohol gives an aldehyde having the same number of cabon atoms as that of alcohol is________

1° alcohol
2° alcohol
3° alcohol
None

CH₃- CH = CH₂+ H₂O ^{\(\underrightarrow { { H }_{ 2 }{ SO }_{ 4 } } \)} A

Pick out the correct statement________.

'A' is isopropyl alcohol and the reaction is Markoni Koff's addition
'A' is isopropyl alcohol and the reaction is nucleophili addition of water.
'A' is propyl alcohol and the reaction invokes nucleophilic attack of water followed by proto nation
both (a) and (b) are correct

Consider the following reaction

C₂ H₅ OH \(\underrightarrow { { PCl }_{ 5 } } \) X \(\underrightarrow { alcKOH } \) Y \(\underrightarrow { alc{ H }_{ 2 }O|{ H }^{ + } } \) Z X, Y and Z respectively are_____.

C₂H₄, C₂H₅COCl, C₂H₅OH

When phenol reacts. with CCl₄ and NaOH, the product formed is__________ acid.

salicylic
cinnamic
benzoic
carboxylic

Part - B

Generic 2 - Answer All Question

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

Write two uses of ethylene glycol.

Name the only primary alcohol which gives positive iodoform test.

How are the following conversions effected
i) benzylchloride to benzylalcohol
ii) benzyalalcohol to benzoic acid
What happens when phenol is treated with diazonium chloride in presence of NaOH?(OR) Give a brief account of coupling reaction.

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

Part - C

Generic 3 - Answer All Question

Account for the following:
(a) Lower members of alcohols are soluble in water but higher members are not.
(b) Alcohols cannot be used as solvent for Grignard reagent.

How is nitroglycerine prepared from glycerol?
Account for the following: (i) Phenol has a smaller dipole moment than methanol, (ii) Phenols do not give protonation reaction readily.

How is glycerol obtained commercially? State its uses.

Write a note on Friedel Crafts reaction of anisole.

What are the oxidation products of glycerol?

Part - D

Generic 5 - Answer All Question

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

How would you distinguish between (i) methyl alcohol and ethyl alcohol (ii) benzyl alcohol and
phenol, (iii) ethyl alcohol and benzyl alcohol?
Explain the mechanism involved in the intermolecular dehydration of alcohols to give ethers.

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

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