In alkaline earth metals, the properties, from the following, that will increase from Be to Ba are-

(i) Atomic radius       
(ii) Ionisation energy       
(iii) Nuclear charge

1. (i) and (ii) 2. (i) and (iii)
3. (ii) and (iii) 4. (i), (ii), and (iii)

Subtopic:  Atomic Size |
 81%
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Incorrect order of ionic size is :

(a)La3+>Gd3+>Eu3+>Lu3+           (b)V2+>V3+>V4+>V5+

(c)Tl+>In+>Sn2+>Sb3+                (d)K+>Sc3+>V5+>Mn7+

Subtopic:  Atomic Size |
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Consider the following changes:

 M(s)M(g)                                                   .....(i)
M(s)M2+(g)+2e-                                    .....(ii)
M(g)M+(g)+e-                                      .....(iiii)
M+(g)M2+(g)+e-                                     ......(iv)
M(g)M2+(g)+2e-                                  ......(v)

The second ionization energy of M could be calculated from the energy values associated with :

(a) 1+3+4                  (b) 2-1+3

(c) 1+5                      (d) 5-3

Subtopic:  Ionization Energy (IE) |
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Incorrect statement among the following is -

1. Van der Waals' radius of iodine is more than its covalent radius

2. All isoelectronic ions belong to the same period of the periodic table

3. I.E1 of N is higher than that of O while I.E2 of O is higher than that of N

4. The electron affinity N is almost zero while that of P is 74.3 kJ mol-1

Subtopic:   Evolution of Periodic Table |
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Aqueous solutions of two compounds M1-O-H and M2-O-H are prepared in two different beakers. If, the electronegativity of M1=3.4 , M2=1.2, O=3.5 and H=2.1, then the nature of two solutions will be respectively:

(a) acidic, basic             (b) acidic, acidic

(c) basic, acidic             (d) basic, basic

Subtopic:  Electronegativity |
 65%
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First three ionisation energies (in kJ/mol) of three representative elements are given below:

Element     IE1                    IE2                   IE3

P               495.8                4562                  6910
Q               737.7               1451                   7733
R               577.5                1817                  2745

Then incorrect option is :

1. Q: Alkaline earth metal.

2. P: Alkali metal.

3. R: s-block element.

4. All three: P,Q & R belong to the same period.

Subtopic:  Ionization Energy (IE) |
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If the ionization enthalpy and negative electron gain enthalpy of an element are 275 and 86 kcal mol-1 respectively, then the electronegativity of the element on the Pauling scale is:

1. 2.8                                     

2. 0.0

3. 4.0                                     

4. 2.6

Subtopic:  Ionization Energy (IE) |
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The incorrect statement is:

(1) The second ionisation energy of Se is greater than that of second ionisation energy of As 

(2) The first ionisation energy of C2+ ion is greater than that of first ionisation energy of N2+ ion

(3) The third ionisation energy of F is greater than that of third ionisation energy of O

(4) Helogens have highest I.E. in respective period

Subtopic:  Ionization Energy (IE) |
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Consider the following ionisation reactions :

I.E. (kJ mol-1)

AgAg++e- ,       A1
B(g)+B(g)2++e-,       B2
C(g)+C(g)2++e-,      C2
B(g)B(g)++e-,       B1
C(g)C(g)++e-,      C1
C(g)2+C(g)3++e-,      C3

If monovalent positive ion of A, divalent positive ion of B and trivalent positive ion of C have zero electron. Then incorrect order of corresponding I.E. is :

(1) C3>C2>B2                       

(2) B1>A1>C1

(3) C3>C2>B2                       

(4) B2>C3>A1

Subtopic:  Ionization Energy (IE) |
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The incorrect match among the following options is : 

1. Ar3d54s1 4th period, 6th group

2.  Kr4d10 5th period, 12th group

3.  Rn6d27s2 7th period, 3th group

4.  Xe4f145d26s2 6th period, 4th group

 

Subtopic:  Electronic Configuration |
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