Himanshu Pandey Organic Chemistry for NEET. We covered all the Himanshu Pandey Organic Chemistry for NEET MCQs in this post for free so that you can practice well for the exam.
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Himanshu Pandey Organic Objective Chemistry for NEET Students
Vinyl magnesium iodide is obtained by reacting magnesium metal and which of the following compounds in the presence of dry ether?
(A) Iodoethene
(B) Iodoethane
(C) 3-Iodoprop-1-ene
(D) 1-Iodopropene
Option a – Iodoethene
The best Grignard’s reagent is:
(A) Methyl magnesium fluoride
(B) Methyl magnesium chloride
(C) Methyl magnesium bromide
(D) Methyl magnesium iodide
Option d – Methyl magnesium iodide
Wurtz reaction is not possible with:
(A) tert-butyl iodide
(B) Isopropyl iodide
(C) n-Propyl iodide
(D) Methyl iodide
Option a – tert-butyl iodide
A mixture of Bromoethane and sec. propyl bromide is subjected to the Wurtz reaction. The product is not possible:
(A) n-Butane
(B) 2-Methyl propane
(C) 2,3-Dimethyl butane
(D) 2-Methyl butane
Option b – 2-Methyl propane
The rate of alkaline hydrolysis of methyl bromide depends upon the concentration of:
(A) Only nucleophile
(B) Only substrate
(C) Both substrate and nucleophile
(D) Independent of concentration of reactant
Option c – Both substrate and nucleophile
Order of reaction between methyl iodide and aq. caustic potash is:
(A) Fourth
(B) Third
(C) Second
(D) First
Option c – Second
During the preparation of alkyl magnesium halide complete anhydrous condition is maintained to:
(A) Initiate the reaction
(B) Prevent the hydrolysis of haloalkane
(C) Prevent the hydrolysis of alkane
(D) Prevent the hydrolysis of R-MgX.
Option d – Prevent the hydrolysis of R-MgX.
During the preparation of R-MgX from haloalkane, a crystal of iodine is used:
(A) As a reducing agent
(B) As a hydrolyzing agent
(C) As a reaction catalyst
(D) As a reaction initiator
Option d – As a reaction initiator
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