For electron affinity of halogens, which of the following is correct?

1. Br > F

2. F > Cl

3. Br > Cl

4. F > I

Concept Questions :-

Electron Affinity (EA)
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Which one of the elements has highest ionisation energy?

1. [Ne]3s23p1

2. [Ne]3s23p2

3. [Ne]3s23p3

4. [Ar]3d104s24p2

 

Concept Questions :-

Ionization Energy (IE)
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Which of the following has the highest electron affinity?

1. F-

2. O-

3. O

4. Na

Concept Questions :-

Electron Affinity (EA)
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The correct order of second ionisation energies of B, C, N, & O is

1. O > N > C > B

2. O > C > N > B

3. O > B > C > N

4. O > N >B > C

Concept Questions :-

Ionization Energy (IE)
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An atom of the element A has 3 electrons in its outermost shell while another atom X has 6 electrons in its outermost shell. The formula of the compound between A and X could be.

(1) A2X3

(2) AX3

(3) A3X2

(4) A2X

Concept Questions :-

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Which of has the largest size?

(1) Li+(aq)

(2) Cs+(aq)

(3) Li+(g) 

(4) Cs+(g)

Concept Questions :-

Lattice/Hydration Energy
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Match list-I with list II and select the correct answer using codes given below:

1. List-I Ions                                List-II Radius (in pm)

(I) Li+                                         (a) 216

(II) Na+                                      (b) 195

(III) Br-                                      (c) 60

(IV) I-                                        (d) 95

     Codes:

      I   II   III   IV

1.   a   b    d    c

2.   b   c    a    d

3.   c   d    b    a

4.   d   c    b    a 

Concept Questions :-

Screening Effect
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The screening effect of d-electrons is :

(1) Equal of the p-electrons

(2) Much more than p-electrons

(3) Same as f-electron

(4) Less than p-electrons

Concept Questions :-

Screening Effect
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Values of electronegativity like 3.0, 2.8, 2.5 are related to :-

(1) Elements having high IP in periodic table

(2) Elements having high EA in periodic table

(3) Chalcogens

(4) None of the above

Concept Questions :-

Electron Affinity (EA)
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According to Gallis, Hanny and Smith 50% ionic character and 50% covalent character in a molecule is related to :-

(1) EN = 1.6 - 2.2

(2) EN =1.7 - 2.2

(3) EN =0.8 - 1.1 

(4) EN =0 - 1.6

Concept Questions :-

Electronegativity
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