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Synthesis of Ethers

The formation...

Question

The formation of oxanium salt of ether is due to:

A

protonation of O atom in ether

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B

donation of an e pair by O atom in ether

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C

the attachment of a proton to O atom in ether by co-ordination

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D

all the above

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Solution

The correct option is B protonation of O atom in ether
Protonation of oxygen atom in ether as oxygen in ether act as nucleophile.

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H_{2} O_{2}

is added to ice cold solution of acidified potassium dichromate in ether and the contents are shaken and allowed to stand:

Q. Assertion (A) : Ethers behave as Lewis base in the presence of mineral acids.
Reason (R) : Oxygen atom in ether is having lone pair electrons.

H_{2} O_{2}

is added to an ice-cold solution of acidified potassium dichromate that has ether and the contents are shaken and allowed to stand:

H_{2} O

is shaken with an acidified solution of

K_{2} C r_{2} O_{7}

in the presence of ether, the ethereal layer turns blue due to the formation of :

Q. Assertion (A) : Ethers behave as Lewis base in the presence of mineral acids in cold condition.
Reason (R) : Oxygen atom in ether has 4 lone pairs of electrons.

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