JEE Mains Question Paper 2018 Chemistry Part 7 Download all the papers for 2019 Exam

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Q-20: Consider the following reaction and statements

(I) Two isomers are produced if the reactant complex ion is a -isomer.

(II) Two isomers are produced if the reactant complex ion is a trans-isomer.

(III)Only one isomer is produced if the reactant complex ion is a trans-isomer.

(IV) Only one isomer is produced if the reactant complex ion is a -isomer.

The correct statements are:

Options:

(A) (I) and (II)

(B) (I) and (III)

(C) (III) and (IV)

(D) (II) and (IV)

Answer: (B)

Solution:-

If the reaction is isomer than following reaction takes Place

Image of reaction takes place

Image of Reaction Takes Place

Image of reaction takes place

I.e. two isomers are produced

If the reactant is Tran’s isomer than following reaction takes place.

Image of reaction takes place

Image of Reaction Takes Place

Image of reaction takes place

I.e. Only 1 isomer is produced. fg

Q-21: Glucose on prolonged heating with HI gives:

Options:

(1)

(2)

(3)

(4)

Answer: (A)

Solution:

The reaction of glucose with giving suggests that all the six carbon atoms are linked in a straight chain, as shown in the reaction given below

Image of reaction of glucose

Image of Reaction of Glucose

Image of reaction of glucose

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