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) |
 70%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Elements H1    H2    egH
    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) |
 66%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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) |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

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

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

Subtopic:  Electron Affinity (EA) |
 73%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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) |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch