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Standard XII

Chemistry

Chemical Properties of Ethers

Assertion: Al...

Question

Assertion: Aluminium chloride $(A l C l_{3})$ is a Lewis acid.
Reason: Lewis acids donate electrons to an acceptor.

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

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Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

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Assertion is true but Reason is false

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Assertion is false but Reason is true

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Both Assertion and Reason are false

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Solution

The correct option is C Both Assertion and Reason are false
$A l C l_{3}$ is a lewis acid because it can accept electrons. $A l$ has vacant orbitals and is strong electrophile due to the presence of high electron negative $C l$ atoms which reduces the electron density from the central atom.

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Similar questions

Q. Read the assertion and reason carefully to mark the correct option out of the options given below:

(a)

If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b)

If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c)

If assertion is true but reason is false.

(d)

If assertion is false but reason is true.
Assertion: 4-nitrophenol is more acidic than picric acid.
Reason: Phenol is a weaker acid than carbonic acid.

Assertion (A) Like bromination of benzene, bromination of phenol is also carried out in the presence of Lewis acid.
Reason (R) Lewis acid polarises the bromine molecule.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Q. Read the assertion and reason carefully to mark the correct option out of the options given below:

(a)

If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b)

If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c)

If assertion is true but reason is false.

(d)

If assertion is false but reason is true.
Assertion: 4-nitrophenol is more acidic than picric acid.
Reason: Phenol is a weaker acid than carbonic acid.

Q. (i)
Assertion: A circle is not a rectilinear figure.
Reason: A figure formed by straight lines only is called a rectilinear figure.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.
(ii)
Assertion: All right angles are equal to one another.
Reason: A unique line passes through a single point.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.

Q. Assertion : Amount of cyanocobalamine required daily is 3 mcg
Reason : Its deficiency causes pernicious anaemia

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Assertion: Aluminium chloride (AlCl3) is a Lewis acid.Reason: Lewis acids donate electrons to an acceptor.

The correct option is C Both Assertion and Reason are falseAlCl3 is a lewis acid because it can accept electrons. Al has vacant orbitals and is strong electrophile due to the presence of high electron negative Cl atoms which reduces the electron density from the central atom.

Assertion: Aluminium chloride $(A l C l_{3})$ is a Lewis acid.
Reason: Lewis acids donate electrons to an acceptor.

The correct option is C Both Assertion and Reason are false
$A l C l_{3}$ is a lewis acid because it can accept electrons. $A l$ has vacant orbitals and is strong electrophile due to the presence of high electron negative $C l$ atoms which reduces the electron density from the central atom.