11th Standard Syllabus & Materials
11th Standard
Tamilnadu 11th Standard Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் Important Questions And Answers Study Material - QB365
NEW11th Standard
Tamilnadu 11th Standard Tamil கேடில் விழுச்செல்வம் - உரைநடை - தமிழகக் கல்வி வரலாறு Important Questions And Answers Study Material - QB365
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - இலக்கணம் - பகுபத உறுப்புகள் Important Questions And Answers Study Material - QB365
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set B
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set B
Published on: 10/11/2020
11th Standard Chemistry Basic Concept of Organic Reactions English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021
Download Tamil Nadu 11th 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.
Which one of the following is positively charged electrophiles ?
CO2
AlCl3
BF3
RX
2.
Assertion (A) : Phenol is less acidic than benzoic acid.
Reason (R) : Phenoxide has less number of resonating structures than benzyl carboxylate ion.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
Both A and R are false.
3.
Which of the following compounds will not undergo Friedal-craft's reaction easily ?
Xylene
Nitrobenzene
Toluene
Cumene
4.
The stability of alkyl free radicals is due to ___________
Hyperconjugation
+I effect
-I effect
Both a & b
5.
Which one is incorrect match of reactions ?
\(C{ H }_{ 3 }-C{ H }_{ 2 }-Br\overset { aq.\quad KOH }{ \longrightarrow } C{ H }_{ 3 }-C{ H }_{ 2 }OH\) ⟶ Nucleophilic substitution reaction
\(\left( C{ H }_{ 3 } \right) C-Cl\overset { \overset { + }{ H } }{ \longrightarrow } { \left( C{ H }_{ 3 } \right) }_{ 3 }C-C{ H }_{ 2 }+{ H }_{ 2 }O+{ Cl }^{ - }\) ⟶ Nucleophilic substitution reaction
6.
The electrometric effect is ___________
Permanent effect
Temporary effect
p-electrons transfer in the effect
Both (b) and (c)
7.
Which of the following statements is not correct for a nucleophile ?
Nucleophiles attack low electron density sites
Nucleophiles are not electron seeking
Nucleophiles is a Lewis acid
Ammonia is a nucleophile
8.
The nucleophile is not ___________
Lewis base
Lewis acid
\({ H }_{ 2 }\overset { .. }{ \underset { .. }{ O } } \)
Carbanion
9.
In -NO2, -NH2, -SO3H, the decreasing order of I II III -I effect is ___________
I > II > III
I > III > II
III > II > I
III > I > II
10.
The most stable carbanion is _____________
CH3-CH2
CH2 = CH
CH2 ≡ C
(CH3)2 - CH
11.
Which of the following is heterolytic compound?
Pyrrole
Furan
Thiophene
All of these
12.
Which of the following species does not acts as a nucleophile ?
ROH
ROR
PCl3
BF3
13.
Heterolytic fission of C-C bond results in the formation of _____________.
free radical
Carbanion
Carbocation
Carbanion and Carbocation
14.
Which of the following carbocation will be most stable ?
Ph3C-+
\({ C }{ H }_{ 3 }-\overset { + }{ C } { H }_{ 2 }\)
\(\left( { CH }_{ 3 } \right) _{ 2 }-\overset { + }{ C } { H }\)
\(CH_{ 2 }=CH-\overset { + }{ C } { { H }_{ 2 } }\)
15.
Which of the following species does not exert a resonance effect ?
C6H5OH
C6H5Cl
C6H5NH2
\({ C }_{ 6 }{ H }_{ 5 }\overset { + }{ N } { H }_{ 3 }\)
16.
Hyper Conjugation is also known as ___________.
no bond resonance
Baker - nathan effect
both (a)and (b)
none of these
17.
Which of the following species is not electrophilic in nature ?
Cl+
BH3
H3O+
+NO2
18.
What is the hybridisation state of benzyl carbonium ion ?
sp2
spd2
sp3
sp2d
19.
Assertion (A) : \(C{ H }_{ 3 }-\overset { + }{ C } H-C{ H }_{ 3 }\) has 6 hyper-conjugative hydrogens. While \(C{ H }_{ 3 }-\overset { + }{ C } H-C{ H }_{ 2 }-C{ H }_{ 3 }\) has 5 hyper-conjugative hydrogens.
Reason (R) : \(C{ H }_{ 3 }-\overset { + }{ C } H-C{ H }_{ 3 }\) is more stable than \(C{ H }_{ 3 }-\overset { + }{ C } H-C{ H }_{ 2 }-C{ H }_{ 3 }\)
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) Both A and R are false.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
Both A and R are false
20.
Assertion (A) : Phenol is less acidic than benzoic acid.
Reason (R) : Phenoxide has less number of resonating structures that benzyl carboxylate ion.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not correct explanation of A.
(c) A is true statement but R is false.
(d) Both A and R are false.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not correct explanation of A.
A is true statement but R is false.
Both A and R are false.
1.
(d)
RX
2.
(c)
A is true but R is false.
3.
(b)
Nitrobenzene
4.
(d)
Both a & b
5.
(d)
\(\left( C{ H }_{ 3 } \right) C-Cl\overset { \overset { + }{ H } }{ \longrightarrow } { \left( C{ H }_{ 3 } \right) }_{ 3 }C-C{ H }_{ 2 }+{ H }_{ 2 }O+{ Cl }^{ - }\) ⟶ Nucleophilic substitution reaction
6.
(d)
Both (b) and (c)
7.
(c)
Nucleophiles is a Lewis acid
8.
(b)
Lewis acid
9.
(b)
I > III > II
10.
(c)
CH2 ≡ C
11.
(d)
All of these
12.
(d)
BF3
13.
(d)
Carbanion and Carbocation
14.
(a)
Ph3C-+
15.
(d)
\({ C }_{ 6 }{ H }_{ 5 }\overset { + }{ N } { H }_{ 3 }\)
16.
(c)
both (a)and (b)
17.
(c)
H3O+
18.
(a)
sp2
19.
(b) Both A and R are true but R is not the correct explanation of A.
20.
(c) A is true statement but R is false.
11th Standard Syllabus & Materials
11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set B
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
Tamilnadu 11th Standard Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set B
Tamilnadu Stateboard 11th Standard Subjects
Maths
Commerce
Economics
Biology
Business Maths and Statistics
Accountancy
Computer Science
Physics
Chemistry
Maths
Biology
Economics
Physics
Chemistry
History
Business Maths and Statistics
Computer Science
Accountancy
Computer Applications
History
Computer Technology
Commerce
Computer Applications
Computer Technology
Tamil
English
French
Tamilnadu Stateboard Standards
