A s-block element (M) reacts with oxygen to form an oxide of the formula MO2. The oxide is pale yellow in colour and paramagnetic. The element (M) is:
A s-block element (M) reacts with oxygen to form an oxide of the formula MO2. The oxide is pale yellow in colour and paramagnetic. The element (M) is:
Option 1 - <p>Na</p>
Option 2 - <p>K</p>
Option 3 - <p>Mg</p>
Option 4 - <p>Ca</p>
2 Views|Posted 6 months ago
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6 months ago
Correct Option - 2
Detailed Solution:
An alkali metal oxide of formula MO2 is super oxide which is formed by K and Rb. KO2 has pale yellow colour and paramagnetic nature, while alkaline earth metal oxides formula MO2 are peroxide and diamagnetic nature.
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Li+ has the highest hydration enthalpy.
Hence it is most hydrated
Therefore, Correct order of hydrated radii is Cs+ < Rb+ < K+ < Na+ < Li+
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Chemistry Ncert Solutions Class 11th 2023
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