Most of the actinoids are slightly affected by HNO3 due to
A
Less reactive nature of actinoids
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B
Poor shielding of 5f electrons
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C
Higher ionisation enthalpy of actinoids than lanthanoids
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D
Formation of a protective oxide layer
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Solution
The correct option is D Formation of a protective oxide layer Most of the actinoids are slightly affected by HNO3 due to formation of a protective oxide layer.