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30 Questions MCQ Test Chemistry Mock Test Series for JEE | GOC
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Conceptual
is known by which of the following names?Conceptual
Conceptual
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 :
Carbocation in 
sp hybridised whereas in 
is more stable than 
Carboxylc acids are stronger acids than alcohols & -NO2 is a strong- I substituent, so, it increases acidic character.
Stability of carbanion is favoured by higher s-character (a) is sp hybridised, (b) & (d) are sp2 & (c) is sp3
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
The total number of benzene derivatives having the molecular formula C7H7CI is :
has II— polar bond but does not have bond ∝-Hydrogen.
Chiral Compounds have assymetric centre.
Electrophiles are electron loving compounds or attacking reagents. SO3 acts as electrophile due to presence of polar II— bond
Free radical is electron deficient intermediate stabilised by + I & + R effect (a) is 30 allyl.
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
is a weaker base due to -R-effect of benzene
Increasing order of stability among the three main conformations (i.e., Eclipse, Anti and Gauche) of 2-fluoroethanol is:
In this compound gauche is more stable than anti, due to H-bonding
Conceptual
In the Newman projection for 2,2-dimethylbutane :
X and Y can respectively be:
configuration is studied around C-2 & C-3
Which of the following is correct set of physical properties of the geometrical isomers?
and 
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.
Anion formed after loss of H+ ion is aromatic, so, it is most acidic
each C-atom 3σ— has bonds, so, they are sp2 hybridised.
Nucleophilicity is directly proportisonal to basic character. Increase in +I effect, increases nucleophilicity. (i) & (ii) have - I - substituents
, higher pKb means weaker base
compound (a) has umbrella inversion despite of chiral centre, it is optically inactive.
Ketone is preferred over alkene Hex -3-en-2-one
Hydroxy is a preferred functional group. So, correct name is 3-Methyl butan-2-ol
Bond length is inversely proportional to bond order
C2H4(2)
C2H2(3)
C6H6(1.5)
C2H6(1)
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