Consider the following statements:

(I) Rutherford name was associated with the development of periodic table.

(II) A metal M having electronic configuration  is d-block element.

(III) Diamond is not an element.

(IV) The electronic configuration of the most electronegative elements is  and select the correct one from the given codes.

(A) I, II, IV                                      (B) I, II, III, IV

(C) II, IV                                         (D) I, III, IV

Concept Questions :-

History
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Difficulty Level:

There are four elements 'p', 'q', 'r' and 's' having atomic number Z-1, Z, Z+1 and Z+2 respectively. If there element 'q' is an inert gas, select the correct answers from the following statements.

(i) 'p' has most negative electron gain enthalpy in the respective period.

(ii) 'r' is an alkali metal.

(iii) 's' exists in +2 oxidation state.

(A) (i) and (ii)                      (B) (ii) and (iii)

(C) (i) and (iii)                     (D) (i), (ii) and (iii)

Concept Questions :-

History
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Difficulty Level:

Which of the following orders is correct for the size?

(1) $M{g}^{2+}

(2) $A{l}^{3+}

(3) $F{e}^{4+}

(4) $Mg>Al>Si>P$

(A) (1), (2) & (3)                          (B) (2), (3) & (4)

(C) (1), (3) & (5)                          (D) (1), (2), (3) & (4)

Concept Questions :-

Atomic Size
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Difficulty Level:

Which of the following orders are correct for the ionization energies?

(1)                    (2)

(3)                             (4)

(A) 1, 2 and 4                              (B) 1, 3 and 4

(C) 1, 2 and 3                              (D) 1, 2, 3 and 4

Concept Questions :-

Ionization Energy (IE)
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Difficulty Level:

The electron gain enthalpies of halogens in kJ mol-1 are as given below.

F =-332, Cl =-349, Br =-234, I =-295.

The least negative value for F as compared to that of Cl is due to:

(A) Strong electron-electron repulsions in the compact 2p-subshell of F.

(B) Weak electron-electron repulsions in the bigger 3p-subshell of Cl.

(C) Smaller electronegativity value of F than Cl.

(D) (A) & (B) both

Concept Questions :-

Electron Affinity (EA)
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Difficulty Level:

Which of the following statements are correct ?

(i) Generally the radius trend and the ionization energy trend across a period are exact opposites.

(ii) Electron affinity values of elements may be exothermic (negative) or endothermic (positive)

(iii) The first ionization energy of sulphur is higher than that of phosphorus ?

(iv) $T{e}^{2-}>{I}^{-}>C{s}^{+}>B{a}^{2+}$ represents the correct decreasing order of ionic radii.

(A) (i), (iii) and (iv)                          (B) (ii), (iii) and (iv)

(C) (i), (ii) and (iv)                           (C) (i), (ii) and (iii)

Concept Questions :-

Atomic Size
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Difficulty Level:

Which of the following statements is not correct?

(A) The first ionization energies (in KJ $mo{l}^{-1}$) of carbon, silicon, germanium, tin, and lead are 1086, 786, 761, 708 and 715 respectively.

(B) Down the group, electronegativity decreases from B to Tl in boron family.

(C) Among oxides of the elements of carbon family, CO is neutral, GeO is acidic and SnO is amphoteric.

(D) The 4f- and 5f- inner transition elements are placed separately at the bottom of the periodic table to maintain its structure.

Concept Questions :-

Ionization Energy (IE)
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Difficulty Level:

The correct order of acidic strength is :

(A) $C{l}_{2}{O}_{7}>S{O}_{2}>{P}_{4}{O}_{10}$                   (B) $C{O}_{2}>{N}_{2}{O}_{5}>S{O}_{3}$

(C) $N{a}_{2}O>MgO>A{l}_{2}{O}_{3}$                   (D) ${K}_{2}O>CaO>MgO$

Concept Questions :-

Nature of Compound
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Difficulty Level:

Which of the following orders is correct?

(A) F>N>C>Si>Ga -non-metallic character.

(B) F>Cl>O>N - oxidising property.

(C) C<Si>P>N - electron affinity value.

(D) All of these.

Concept Questions :-

Nature of Compound
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Difficulty Level:

If the same element is forming oxides in different oxidation states then :

(A) that oxides will be neutral in nature in which element will be in its highest oxidation state.

(B) that oxide will be highest acidic in nature in which element will be in this highest oxidation state.

(C) that oxide will be amphoteric in nature in which element will be in its highest oxidation state.

(D) that oxide will be highly basic in nature in which element will be in its highest oxidation state.

Concept Questions :-

Nature of Compound