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Class 9 Chemistry · Chapter 8 · Test 6

Electron Affinity and Electronegativity

24 MCQs covering electron affinity and electronegativity, their definitions, energy changes during electron gain, attraction for shared electrons, and their periodic trends across periods and down groups.

MCQs

24 questions · 20 min · 24 marks

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Sample questions

The first 5 of 24. Try each one, then tap to see the answer.

  1. Question 1

    What is electron affinity?

    • AEnergy required to remove a proton
    • BEnergy change when an electron is added to an isolated gaseous atom
    • CEnergy required to remove an electron
    • DEnergy released when a neutron is removed
    Show answer

    Answer: B

    Electron affinity is the energy change that occurs when an electron is added to the outermost shell of an isolated gaseous atom.

  2. Question 2

    What type of atom is considered when defining electron affinity?

    • AAn isolated gaseous atom
    • BA solid atom
    • CA liquid atom
    • DA bonded molecule
    Show answer

    Answer: A

    Electron affinity is defined for the addition of an electron to an isolated gaseous atom.

  3. Question 3

    What generally happens when an electron is added to an atom with a favorable electron affinity?

    • AEnergy is released
    • BEnergy is always absorbed
    • CThe nucleus disappears
    • DThe atom loses all electrons
    Show answer

    Answer: A

    The addition of an electron can release energy and the chapter gives fluorine as an example.

  4. Question 4

    What is the electron affinity of fluorine given in the chapter?

    • A+328 kJ mol^-1
    • B-328 kJ mol^-1
    • C+496 kJ mol^-1
    • D-496 kJ mol^-1
    Show answer

    Answer: B

    The chapter gives the electron affinity of fluorine as -328 kJ mol^-1.

  5. Question 5

    What does the negative sign in the electron affinity value of fluorine indicate according to the chapter?

    • AEnergy is released
    • BEnergy is destroyed
    • CNo energy change occurs
    • DThe atom loses a proton
    Show answer

    Answer: A

    The negative value represents energy released when the electron is added to fluorine according to the chapter convention.

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