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

Concept Questions :-

Electronegativity
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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 :

(a) Q: Alkaline earth metal        (b) P: Alkali metals

(c) R: s-block element              (d) They belong to same period

Concept Questions :-

Ionization Energy (IE)
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If the ionization enthalpy and 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:

(a) 2.8                                      (b) 0.0

(c) 4.0                                      (d) 2.6

Concept Questions :-

Ionization Energy (IE)
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The incorrect statement is:

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

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

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

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

Concept Questions :-

Ionization Energy (IE)
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Consider the following ionisation reactions :

I.E. (kJ mol-1)

AgAg++e- ,       A1B(g)+B(g)2++e-,       B2C(g)+C(g)2++e-,      C2B(g)B(g)++e-,       B1C(g)C(g)++e-,      C1C(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 :

(a)C3>C2>B2                       (b)B1>A1>C1

(c)C3>C2>B2                       (d)B2>C3>A1

Concept Questions :-

Ionization Energy (IE)
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Which of the following is the incorrect match for atom of element?

(a) Ar3d54s1                        4th period, 6th group

(b)  Kr4d10                            5th period, 12th group

(c)  Rn6d27s2                       7th period, 3th group

(d)  Xe4f145d26s2               6th period, 4th group

 

Concept Questions :-

Electronic Configuration
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Which of the following order is correct for the property mentioned in brackets?

(a) S2->Cl->K+>Ca2+                 (Ionisation energy)

(b) C<N<F<O                              (2nd Ionisation energy)

(c) B>Al>Ga>In>Tl                     (Electronegativity)

(d)Na+>Li+>Mg2+>Be2+>Al3+    (Ionic radius)

Concept Questions :-

Ionization Energy (IE)
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IP1 and IP2 Mg are 178 and 348  Kcal mol-1 . The energy required for the reaction, 

                                       MgMg2+ + 2e- is :

(a) +170 Kacl 

(b) +526Kacl

(c) -170Kacl 

(d) -526Kacl

Concept Questions :-

Ionization Energy (IE)
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Which of the following characteristics regarding halogens is not correct?

(a) Ionization energy decreases with increases in atomic number 

(b) Electronegativity decreases with increases in atomic number 

(c) Electron affinity decreases with increases in atomic number 

(d) Enthalpy of fusion increases with increases in atomic number 

 

Concept Questions :-

Electron Affinity (EA)
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The process requiring the absorption of energy is :

(a) FF-

(b) HH-

(c) ClCl-

(d) OO2-

Concept Questions :-

Electron Affinity (EA)
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