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Standard XII

Chemistry

Octet Rule

Assertion :Th...

Question

Assertion :The valence electrons of most electropositive elements are 8. Reason: Elements with 8 valence electrons are stable due to completely filled valence shell.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is D Assertion is incorrect but Reason is correct
The valence electrons of most electropositive elements are 1, 2 or 3 and elements with 8 valence electrons are stable due to completely filled valence shell.

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Similar questions

Q. Assertion :The valence electrons of most electropositive elements is 8. Reason: Elements with 8 valence electrons are stable due to completely filled valence shell.

Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
Reason: A shell can have maximum

{2n}^{2}

electrons.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices.

(a) Assertion and Reason both are correct statements an Reason is correct explanation for Assertion.

(b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion.

(d) Assertion is wrong statement but Reason is correct statement.

Assertion (A) Semiconductors are solids with conductivities in the intermediate range from $10^{-} 6 - 10^{4} o h m^{-} 1 m^{-} 1$ .

Reason (R) Intermediate conductivity in semiconductor is due to partially filled valence band.

Assertion

Lithium sulphate does not form alums.

Reason

$L i^{+}$ is too small to form a stable lattice required for double-salt/alum formation.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

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Assertion :The valence electrons of most electropositive elements are 8. Reason: Elements with 8 valence electrons are stable due to completely filled valence shell.

The correct option is D Assertion is incorrect but Reason is correctThe valence electrons of most electropositive elements are 1, 2 or 3 and elements with 8 valence electrons are stable due to completely filled valence shell.

The correct option is D Assertion is incorrect but Reason is correct
The valence electrons of most electropositive elements are 1, 2 or 3 and elements with 8 valence electrons are stable due to completely filled valence shell.