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QJEEM21Ch727a: JEE Main 2021 Chemistry - Class 11 JEEM21Ch727a Solution: A s-block element (M) reacts with oxygen to form an oxide of…

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 :

Multiple Choice Options

  • A Mg
  • B Na
  • C Ca
  • D K

Step-by-Step Verified Solution

The element (M) is potassium (K). It reacts with O2 to form KO2, which is paramagnetic in nature. All other elements form oxides or peroxides which are diamagnetic in nature.

JEE Main 2021 (Online) 20th July Morning Shift Chemistry - s-Block Elements Question 74 English Explanation

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