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JEE Main 202126 FebruaryEvening Shift
Exam
JEE Main
Year
2021
Date
26 February
Shift
Evening Shift
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

JEE Main 2021 · 26 February · Evening Shift · Chemistry · Classification of Elements and Periodicity in Properties

The correct order of electron gain enthalpy is:

The correct order of electron gain enthalpy is:

Options

  1. AS>O>Se>TeS > O > Se > Te
  2. BO>S>Se>TeO > S > Se > Te
  3. CS>Se>Te>OS > Se > Te > O
  4. DTe>Se>S>OTe > Se > S > O

Correct answer

C. S>Se>Te>OS > Se > Te > O

Step-by-step solution

Electron gain enthalpy is the amount of energy released when an element accepts an electron. The process is endothermic.

correct order of electron gain enthalpy is OSe>TeO Se > Te

⇒S>Se>Te>O⇒ S > Se > Te > O

(Oxygen shows least electron gain enthalpy due to small size of atom)

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