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Standard XII

Chemistry

Trend in Ionisation Enthalpy

Assertion :As...

Question

Assertion :As we move from left to right the reactivity of the elements increases. Reason: Noble gases are placed at the extreme right of the period.

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
As we move from left to right the metalic properties decreases and non-metalic property increases hence reactivity of the elements decreases. Noble gases are placed at the extreme right of the period.

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Similar questions

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.

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}

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Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

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Reason:

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{CaCO}_{3}

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Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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Assertion :As we move from left to right the reactivity of the elements increases. Reason: Noble gases are placed at the extreme right of the period.

The correct option is D Assertion is incorrect but Reason is correctAs we move from left to right the metalic properties decreases and non-metalic property increases hence reactivity of the elements decreases. Noble gases are placed at the extreme right of the period.

The correct option is D Assertion is incorrect but Reason is correct
As we move from left to right the metalic properties decreases and non-metalic property increases hence reactivity of the elements decreases. Noble gases are placed at the extreme right of the period.