12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A

Published on: 13/10/2020
12th Standard Chemistry Hydroxy Compounds and Ethers English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021
Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Chemistry Test

1.
Alcohols are isomeric with ______.
aldehyde
ketones
ethers
esters
2.
The IUPAC name of
2-methyl-2-propanol
2-methyl-l-butanol
2,3- dimethyl tributanol
2,3-dimethyl-2-butanol
3.
The reactivity of alcohols with respect to oxidation decreases with ______.
increase in α - H
decrease in α - H
increase in β - H
decrease in β - H
4.
1-Propanol and 2- propanol can be best distinguished by ______.
oxidation with KMnO4 followed by reaction with Fehling solution
oxidation with acidic dichromate followed by reaction with Fehling solution
oxidation by heating with copper followed by reaction with Fehling solution
oxidation with concentrated H2SO4 followed by reaction with Pehling solution
5.
When phenol is distilled with zinc dust it gives______.
benzaldehyde
benzoic acid
toluene
benzene
6.
In the sequence of reactions Identify 'C'.
7.
The above reaction is called ______.
Gattermann reaction
Williamson ether synthesis
Swern's reaction
Riemer tiemann reaction
8.
Which one of the following would not react with cone. HCI and anhy. ZnCl2 at room temperature?
(CH3)3COH
(CH3)2CHOH
\({ CH }_{ 3 }-{ CH }_{ 2 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -OH\)
CH3 - CH2 - CH2 - OH
9.
Which one of the following alcohols on oxidation gives carboxylic acid with lesser number of carbon atoms?
(CH3)2-CH- CH2OH
CH3CH2CHOHCH3
CH3-(CH2)3-CH2OH
both (a) and (c)
10.
Which among the following statement are correct with regard to alkyl halides?
Alkyl halides on heating with aq NaOH gives alcohols
10 alkyl halides proceed by SN2 mechanism
20 and 30 alkyl halides undergo substitution by SN1 mechanism
all the above
11.
Isoprophylbenzene on air oxidation in the presence of dilute acid gives ______.
C6H5COOH
C6H5COCH3
C6H5COC6H5
C6H5- OH
12.
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 ehane
13.
Which of the following compound can be used as antifreeze in automobile rediators?
methanol
ethanol
Neopentyl alcohol
ethan -1, 2-diol
14.
The correct IUPAC name of the compound
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
15.
Which one of the following will react with phenol to give salicyladehyde after hydrolysis.
Dichlo methane
trichloroethane
trichloro methane
CO2
16.
on treatment with Con H2SO4, predominately gives______.
17.
In the reaction sequence, Ethane \(\overset { HOCl }{ \longrightarrow } A\overset { x }{ \longrightarrow } \) ethan -1, 2 - diol. A and X respectively are ________.
Chloroethane and NaOH
ethanol and H2SO4
2 – chloroethan -1-ol and NaHCO3
ethanol and H2O
18.
Which of the following compounds on reaction with methyl magnesium bromide will give tertiary alcohol.
benzaldehyde
propanoic acid
methyl propanoate
acetaldehyde
19.
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
Codes:
a) if both assertion and reason are true and reason is the correct explanation of assertion.
b) if both assertion and reason are true but reason is not the correct explanation of assertion.
c) assertion is true but reason is false
d) both assertion and reason are false.
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.
1.
(c)
ethers
2.
(d)
2,3-dimethyl-2-butanol
3.
(b)
decrease in α - H
4.
(c)
oxidation by heating with copper followed by reaction with Fehling solution
5.
(d)
benzene
6.
(b)
7.
(b)
Williamson ether synthesis
8.
(d)
CH3 - CH2 - CH2 - OH
9.
(b)
CH3CH2CHOHCH3
10.
(d)
all the above
11.
phenol
12.
13.
(d)
ethan -1, 2-diol
14.
(a)
4 – chloro – 2,3 – dimethyl pentan – 1-ol
15.
trichloro methane
16.
According to Saytzeff rule.
17.
18.
19.
a) if both assertion and reason are true and reason is the correct explanation of assertion.
12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications களப்பெயர் முறைமை (DNS) Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications வலையமைப்பு எடுத்துக்காட்டுகள் மற்றும் நெறிமுறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications கணினி வலையமைப்பு ஓர் அறிமுகம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications PHP-உடன் MySQL-ஐ இணைத்தல் Sample Question Papers Study Material - QB365 Set A
Tamilnadu Stateboard 12th Standard Subjects

Maths

Chemistry

Physics

Biology

Computer Science

Business Maths and Statistics

Economics

Commerce

Accountancy

History

Computer Applications

Biology

Computer Technology

Computer Applications

Computer Science

Business Maths and Statistics

Commerce

Economics

Maths

Chemistry

Physics

Computer Technology

History

Accountancy

Tamil

English

French
Tamilnadu Stateboard Standards