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Assertion : The first ionisation energy ...

Assertion : The first ionisation energy of Be is greater than that of B.
Reason : 2p-orbital is lower in energy than 2s.

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The correct Answer is:
C
2s-orbital is lower in energy than 2p-orbital.
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Explore conceptually related problems

Assertion (A) : The first IE of Be is greater than that of B Reason (R ) : 2p orbitals is lower in energy than 2s

Assertion: The first ionisation energy of `Be` is greater than that of `B`.
Reason: 2p-orbital is lower in energy than 2s-orbital.

Assertion: The first ionisation energy of Be is greater than boron.
Reason: 2p-orbitals have lower energy than 2s-orbital

Assertion: The first ionization energy of Be is greater than that of B.
Reason: 2p-orbital is lower in energy than 2s-orbital.

Assertion :- The first ionization energy of Be is greater than that of B 2p- orbital is lower in energy when 2s- orbital.

First Ionisation energy of Be is higher than that of Boron.
Select the correct statements regarding this
(i) It is easier to extract electron from 2p orbital than 2s orbital
Penetration power of 2s orbital is greater than 2p orbital
Shielding of 2p electron by 2s electron
Radius of Boron atom is larger than that of Be

कथन : Be की प्रथम ऊर्जा B से अधिक होती है।
कारण : 2p कक्षक की ऊर्जा 2s कक्षक के कम होती है ।

कथन : Be की प्रथम आयनन ऊर्जा B की अपेक्षाकृत उच्च होती है ।
कारण : 2p - कक्षक की ऊर्जा 2s - कक्षक की अपेक्षा कम होती है ।

In each of the following questions a Statement of Assertion (A ) is given followed by a corresponding statement of Reason (R ) Just below it . Of the statement mark the correct answer as Assertion . The first ionization energy of Be is greater than that of B. Reason . 2p- Orbitals is lower in energy than 2s- orbital.

For a mutielectron atom, the maximum of 2p-orbital in radial probability distribution graph is nearer the nucleus than that of 2s-orbital . Therefore, 2p-orbital should be closer to the nucleus and lower in energy than 2s-orbital. But 2s-orbital has lower energy than 2p-orbital. Explain.

STATEMENT-1: First ionization enthalpy of Be is greater than that of B. and
STATEMENT-2: 2p orbital is lower in energy than 2s, orbital.

Assertion: The first ionization energy of Be is greater than that of B.
Reason: 2p-orbital is lowerr in energy than 2s-orbital.

Assertion: The first ionisation energy of aluminium is lower than that of magnesium. Reason: The ionic radius of aluminium is smaller than that of magnesium.

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