Electron Affinity (EA) NCERT Exercise Based MCQs Classification of Elements and Periodicity in Properties Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Q1:

Difference between electron gain enthalphy and electronegativity is described by :

1) Valence electrons

2) Atomic size

3) Atomic radii

3) Atomic number

Subtopic: Electronegativity | Electron Affinity (EA) |

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Q2:

Elements	$∆ H_{1}$	$∆ H_{2}$	$∆_{e g} H$
I	520	7300	-60
II	419	3051	-48
III	1681	3374	-328
IV	1008	1846	-295
V	2372	5251	+48
VI	738	1451	-40

The least reactive element based on the above data is :
1. III
2. IV
3. II
4. V

Subtopic: Ionization Energy (IE) | Electron Affinity (EA) |

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Q3:

An element with higher negative electron gain enthalpy in the given pair is-

(i) O or F (ii) F or Cl

1.	O, Cl	2.	F, F
3.	O, F	4.	F, Cl

Subtopic: Electron Affinity (EA) |

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Q4:

The relationship between 1^st and 2 ^nd electron gain enthalpy of oxygen atom (O) would be :

1.	Both values of electron gain enthalpy are negative.
2.	The 1^st electron gain enthalpy of (O) is negative while 2 ^nd is positive.
3.	Both values of electron gain enthalpies are positive.
4.	-The 1^st electron gain enthalpy of (O) is positive while 2 ^nd is negative.

Subtopic: Electron Affinity (EA) |

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Q5:

The reactivity of alkali metals increases, whereas halogen decreases down the group, because -

1.	On moving down, ionization enthalpy decreases in group 1 while the electron gain enthalpy becomes less negative in group 17.
2.	On moving down, ionization enthalpy increases in group 1 while the electron gain enthalpy becomes less negative in group 17.
3.	On moving down, ionization enthalpy increases in group 1 while the electron gain enthalpy becomes less positive in group 17.
4.	On moving down, ionization enthalpy decreases in group 17 while the electron gain enthalpy becomes less negative in group 1.

Subtopic: Ionization Energy (IE) | Electron Affinity (EA) |

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