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The first ionization potentials (eV) of Be and B respectively are
Options
(a) 8.29, 9.32
(b) 9.32, 9.32
(c) 8.29, 8.29
(d) 9.32, 8.29
Correct Answer:
9.32, 8.29
Explanation:
First ionisation potential of Be is greater than boron due to following configuration ₄Be=1s²,2s² ₅B=1s²,2s²2p¹ Order of attraction of electrons towards nucleus 2s>2p, so more amount of energy is required to remove the electron with 2s-orbital in comparison to 2p orbital
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Question Type: Memory
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Difficulty Level: Easy
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Topics: Classification of Elements and Periodicity
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Subject: Chemistry
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An isocyanide on hydrolysis gives
- The Ca²⁺ and F⁻ are located in CaF₂ crystal,respectively at face centred cubic lattic points
- 3-Pentanol upon reaction with PBr₃ gives 2 and 3-bromopentane.Such rearrangement
- A solid compound X on heating gives CO₂ and a residue .
- If in a container no mass and no heat exchange occurs then it constitutes a
Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Classification of Elements and Periodicity (94)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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