11th Standard Syllabus & Materials
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TN 11th Tamil இயற்கை வேளாண்மை,சுற்றுச்சூழல் -செய்யுள் - மனோன்மணீயம் Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil பீடு பெற நில் - துணைப்பாடம் - வாடிவாசல் Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set A
Published on: 10/11/2020
11th Standard Chemistry Basic Concept of Organic Reactions English Medium Free Online Test One Mark Questions 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.
Primary alcohols undergo which type of reaction to form alkenes ?
Elimination
Oxidation
Reduction
Hydrolysis
2.
Which one of the following electrophile used for nitration of benzene ?
Br⊕
NO2⊕
-NH2
NOӨ
3.
Statement - I : Fluoro acetic acid is stronger acid than acetic acid
Statement - II : Fluorine has high electronegativity and it is facilitate to dissociate the O-H bond easily.
Statement-I and II are correct and statement-II is correct explanation of statement-I.
Statement-I and II are correct but statement-II is not correct explanation of statement-I.
Statement-I is correct but statement-II is wrong
Statement-I is wrong but statement-II is correct
4.
Which one of the following has least acidic character ?
HCOOH
CH3COOH
CH2CICOOH
CCl3COOH
5.
Which one of the following species has tendency to show +1 effect ?
-NH2
-CI
-C6H5
-CH3
6.
Which one of the following is nucleophile ?
BF3
AICl3
CO2
R-SH
7.
Which one of the following is not nucleophile ?
H2O
NH3
R-OH
FeCl3
8.
Which one of the following is correct order of the stability of carbanions ?
-C(CH3)3 > -CH(CH3)2 > -CH2-CH3 > -CH3
-CH3 > -CH2-CH3 > -CH(CH3)2> -(CH3)3
-CH(CH3)2>-H3 > -CH2-CH3 >-(CH3)3
-CH2-CH3>-CH(CH3)2>-CH3>-(CH3)3
9.
The number of hyperconjugation structures possible in ___________
3
2
6
None of these
10.
CH2 is an _________
Electrophile
Nucleophile
Free Radical
Ambiphiles
11.
The most stable alkene is _______
CH2=CH-CH2-CH3
\(C{ H }_{ 2 }=\underset { \overset { | }{ C{ H }_{ 3 } } }{ CH } =C{ H }_{ 2 }\)
CH2 = CH-CH = CH2
CH3-CH = CH-CH3
12.
Which of the following represents the correct order of stability of the given carbocations?
III > I > II
I > III > II
III > II > I
II > III > I
13.
In which of the following homolytic bond fision takes place?
Alkaline hydrolysis of ethyl chloride
Addition of HBr to double bond
Photochlorination of methane
Nitration of benzene
14.
The geometrical shape of carbocation is ______________.
Linear
tetrahedral
Planar
Pyramidal
15.
-I effect is shown by ____________.
-Cl
-Br
both (a) and (b)
-CH3
16.
Which of the group has highest +I effect ?
CH3-
CH3 - CH2 -
(CH3)2 - CH-
(CH3)3 - C-
17.
Homolytic fission of covalent bond leads to the formation of ___________.
electrophile
nucleophile
Carbo cation
free radical
18.
For the following reactions
(A) CH3CH2CH2Br + KOH → CH3 - CH = CH2 +KBr + H2O
(B) (CH3)3CBr + KOH → (CH3)3 COH + KBr
(C) 
Which of the following statement is correct ?
(A) is elimination, (B) and (C) are substitution
(A) is substitution, (B) and (C) are elimination
(A) and (B) are elimination and (C) is addition reaction
(A) is elimination, B is substitution and (C) is addition reaction
19.
Assertion (A) : Allyl carbanion (\(C{ H }_{ 2 }=CH-\overset { \overset { - }{ .. } }{ C } { H }_{ 2 }\)) is more stable than \(\overset { \overset { - }{ .. } }{ C } { H }_{ 2 }-N{ O }_{ 2 }\)
Reason (R) : On \(\overset { \overset { - }{ .. } }{ C } { H }_{ 2 }-N{ O }_{ 2 }\) , only -I effect of NO- group is present while is allyl carbanion, resonance is present.
(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.
20.
Assertion : Tertiary Carbocations are generally formed more easily than primary Carbocations ions.
Reason : Hyper conjugation, as well as inductive effect due to additional alkyl group, stabilize tertiary carbonium ions.
(a) both assertion and reason are true and reason is the correct explanation of assertion.
(b) 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
both assertion and reason are true and reason is the correct explanation of assertion
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.
(a)
Elimination
2.
(b)
NO2⊕
3.
(a)
Statement-I and II are correct and statement-II is correct explanation of statement-I.
4.
(b)
CH3COOH
5.
(a)
-NH2
6.
(d)
R-SH
7.
(d)
FeCl3
8.
(c)
-CH(CH3)2>-H3 > -CH2-CH3 >-(CH3)3
9.
(a)
3
10.
(a)
Electrophile
11.
(b)
\(C{ H }_{ 2 }=\underset { \overset { | }{ C{ H }_{ 3 } } }{ CH } =C{ H }_{ 2 }\)
12.
(a)
III > I > II
13.
(c)
Photochlorination of methane
14.
(c)
Planar
15.
(c)
both (a) and (b)
16.
(d)
(CH3)3 - C-
17.
(d)
free radical
18.
(d)
(A) is elimination, B is substitution and (C) is addition reaction
19.
(b) Both A and R are true but R is not correct explanation of A.
20.
(a) both assertion and reason are true and reason is the correct explanation of assertion.
11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - துணைப்பாடம் - யானை டாக்டர் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set A
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