Assertion :Second Ionization energy of $M g$ is greater than that of its first Ionization energy. Reason: Its difficult to make a charged species more charged by subsequent ionization.

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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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Magnesium has a total of 2 electrons in its most outer sub-shell, they "feel" an attraction to the nucleus where the positive charges are,that attractive force is "pulling" on the 2 (3s) electrons. When Magnesium ionizes to ${M g}^{+}$ (from $3 s^{2}$ to $3 s^{1}$ ) not the attractive force is stronger on that 1 electron. So for every electron that is removed, the next electron requires more energy in order for that electron to be removed.

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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.
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Reason : High ionization enthalpy and low heat of hydration energy

Q. Assertion: The compressibility factor for

H_{2}

and

H e

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

Reason: The compressibility factor for

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and

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can be derived from Van der Waal's equation.

Assertion (A) p-nitrophenol is more acidic than phenol.
Reason (R) Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.
(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. Assertion
If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
High biological oxygen demand means low activity of bacteria in water.

Assertion (A) All collision of reactant molecules lead to product formation.

Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

(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 :Second Ionization energy of Mg is greater than that of its first Ionization energy. Reason: Its difficult to make a charged species more charged by subsequent ionization.

Assertion :Second Ionization energy of $M g$ is greater than that of its first Ionization energy. Reason: Its difficult to make a charged species more charged by subsequent ionization.