GOC


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30 Questions MCQ Test Chemistry Mock Test Series for JEE | GOC

GOC for Class 12 2023 is part of Chemistry Mock Test Series for JEE preparation. The GOC questions and answers have been prepared according to the Class 12 exam syllabus.The GOC MCQs are made for Class 12 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for GOC below.
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GOC - Question 1

Which of the following functional groups are poosible in C4H8O2

Detailed Solution for GOC - Question 1

Conceptual

GOC - Question 2

The compound  is known by which of the following names?

Detailed Solution for GOC - Question 2

Conceptual

GOC - Question 3

Which of the following have only 20 H-atom?

Detailed Solution for GOC - Question 3

Conceptual

GOC - Question 4

Consider the following statements :

(a)  is more stable than 

(b)  is more stable than 

(c)  is more stable than 

(d)  is more stable than 

of these statements :

Detailed Solution for GOC - Question 4

Carbocation in  sp hybridised whereas in  is more stable than 

GOC - Question 5

Most acidic compound is:

Detailed Solution for GOC - Question 5

Carboxylc acids are stronger acids than alcohols & -NO2 is a  strong- I substituent, so, it increases acidic character.

GOC - Question 6

Most stable carbanion is :

Detailed Solution for GOC - Question 6

Stability of carbanion is favoured by higher s-character (a) is sp hybridised, (b) & (d) are sp2 & (c) is sp3

GOC - Question 7

(1) 

(2) CH3 — CH=CH2

(3) CH3 — CH3

C—C single bond distance would be :

Detailed Solution for GOC - Question 7

Bond length decreases with increase in s-character of combining orbitals. bond in compound 
(1) involves sp2-sp2 overlap    
(2) involves sp2-sp3 overlap    
(3) involves sp3-sp3 overlap

GOC - Question 8

The total number of benzene derivatives having the molecular formula C7H7CI is :    

Detailed Solution for GOC - Question 8

 

GOC - Question 9

Tautomerisum is not exhibited by :

Detailed Solution for GOC - Question 9

 has II— polar bond but does not have  bond ∝-Hydrogen.

GOC - Question 10

Which of the following compounds is not chiral?

Detailed Solution for GOC - Question 10

Chiral Compounds have assymetric centre.

GOC - Question 11

Which of the following species is an electrophile?

Detailed Solution for GOC - Question 11

Electrophiles are electron loving compounds or attacking reagents. SO3 acts as electrophile due to presence of polar II— bond

GOC - Question 12

Which one is most stable free redical?

Detailed Solution for GOC - Question 12

Free radical is electron deficient intermediate stabilised by + I & + R effect (a) is 30 allyl.

GOC - Question 13

Select the correct option for stability of following resonance structure:

Detailed Solution for GOC - Question 13

Correct Answer :- D

Explanation : a) More stable because it has no charge.

b) More stable than (III) and (I) as it has negative charge on electronegative atom.

c) Least stable

The correct option is y > x > z

GOC - Question 14

Which comparison is not correct as indicated?

Detailed Solution for GOC - Question 14

 is a weaker base due to -R-effect of benzene

GOC - Question 15

In the structure:

the configurations at the chiral centres are:

GOC - Question 16

Increasing order of stability among the three main conformations (i.e., Eclipse, Anti and Gauche) of 2-fluoroethanol is:

Detailed Solution for GOC - Question 16

In this compound gauche is more stable than anti, due to H-bonding

GOC - Question 17

The alkene that exhibits geometrical isomerism is :    

Detailed Solution for GOC - Question 17

Conceptual

GOC - Question 18

In the Newman projection for 2,2-dimethylbutane :

X and Y can respectively be:

Detailed Solution for GOC - Question 18

 configuration is studied around C-2 & C-3

GOC - Question 19

Which of the following is correct set of physical properties of the geometrical isomers?

 and  

Detailed Solution for GOC - Question 19

Given compounds are Cis & trans but Cℓ & CH3 are different groups, So, displacement of electrons in trans form is unidirectional. Hence trans has higher dipole.

GOC - Question 20

Which of the following is the most acidic compound?

Detailed Solution for GOC - Question 20

Anion formed after loss of H+ ion is aromatic, so, it is most acidic

GOC - Question 21

The hybridisation of carbons in 1, 3-butadiene is :    

Detailed Solution for GOC - Question 21

 each C-atom 3σ— has bonds, so, they are sp2 hybridised.

GOC - Question 22

Arrange the following in correct order of nucleophilicity :



Detailed Solution for GOC - Question 22

Nucleophilicity is directly proportisonal to basic character. Increase in +I effect, increases nucleophilicity. (i) & (ii) have - I - substituents 

GOC - Question 23

  

The correct decreasing order of pKb is :

Detailed Solution for GOC - Question 23

, higher pKb means weaker base

GOC - Question 24

Among the following, the optically inactive compound is:

Detailed Solution for GOC - Question 24

compound (a) has umbrella inversion despite of chiral centre, it is optically inactive.

GOC - Question 25

The IUPAC name of neopentane is :    

Detailed Solution for GOC - Question 25

GOC - Question 26

Which one of following does not have sp2 hybridized carbon?    

Detailed Solution for GOC - Question 26

GOC - Question 27

IUPAC name for the compound given below is :

Detailed Solution for GOC - Question 27

GOC - Question 28

Indicate the wrongly named compound :

Detailed Solution for GOC - Question 28

Ketone is preferred over alkene Hex -3-en-2-one

GOC - Question 29

Which of the following compounds has wrong IUPAC name ?

Detailed Solution for GOC - Question 29

Hydroxy is a preferred functional group. So, correct name is 3-Methyl butan-2-ol

GOC - Question 30

Decreasing order of bond length is:

(I) C2H4        
(II) C2H2        
(III) C6H6        
(IV) C2H6

Detailed Solution for GOC - Question 30

Bond length is inversely proportional to bond order
C2H4(2)        
C2H2(3)      
C6H6(1.5)    
C2H6(1)

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