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Element/Ion that has the highest electron affinity is : 

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

An ion that has the largest size among the following is :
1. Li⁺(aq)
2. Cs⁺(aq)
3. Li⁺(g) 
4. K⁺(aq)

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 

If Z_eff of element having atomic number 11 is 2.2, then Z_eff of elements having atomic number 12 and atomic number 20 are respectively :-
1. 2.85, 3.92
2. 3.92, 2.85
3. 2.2, 2.2
4. None of the above

In scandium series, maximum distance between neutrons containing site and valence shell is of :-
1. Sc
2. Mn
3. Fe
4. Zn

Compound that is isoelectronic with an adduct of "Diborane and Ammonia" is-
1. Hydrogen peroxide.
2. Diborane (at absolute zero temp.).
3. First member of alkyne series.
4. Diborane (at 10$°$C temp).

Which of the following ionisation energy order is NOT correct :-
(1) Cu⁺ > Cu⁺²
(2) Mn⁺² > Mn⁺³
(3) ${\mathrm{N}}^{+}$< ${\mathrm{N}}^{}$
(4) All of the above

Actinide contraction is mainly related to:

The first four IP values of an element are 19, 190, 2000 and 2600 eV/atom. Element belongs to:-
(1) Amphoteric elements
(2) Four electron donor group
(3) s-block
(4) All of the above

A large difference between fifth and sixth ionisation energies indicate the element having :-
1. 15 proton in nucleus
2. 13 proton in nucleus
3. 11 proton in nucleus
4. Ionisation energy is NOT related to number of proton in nucleus

Which of the following pairs of d-orbitals will have electron density along the axes?
1. d_z²,d_xz
2. d_xz,d_yz
3. d_z²,d_x²-y²
4. d_xy,d_x²-y²

"Metals are usually not found as nitrates in their ores'"
Out of the following two (I and II) reasons which is/are true for the above observation?
I. Metal nitrates are highly unstable.
II. Metal nitrates are highly soluble in water.
1. I and ll are true 
2. I and II are false
3. I is false but ll is true
4. l is true but ll is tase

The correct order of solubility in an aqueous medium is: 
1. CuS > ZnS > Na₂S
2. ZnS > Na₂S > CuS
3. Na₂S > CuS > ZnS
4. Na₂S > ZnS > CuS

Which one of the following compounds is a peroxide ?
1. KO₂
2. BaO₂
3. MnO₂
4. NO₂

An element whose IUPAC name is Ununtrium (Uut) belongs to:
1. s-Block elements                       
2. p-Block elements
3. d-Block elements                              
4. Inner transition elements .

The graph that represents the relationship between atomic number (Z) and magnetic moment of d-block elements among the following is-
[Outer electronic configuration : $(n-1)d^{x}n{s}^{1 or 2}]$
1.
2. 
3. 
4. 

The process that requires absorption of energy is:
1. $N\to N^{-}$                       
2. $F\to F^{-}$
3. $Cl\to C{l}^{-}$                     
4. $H\to H^{-}$

Which of the following compounds has a positive enthalpy of solution?
(1) LiF                                       
 (2) LiCl
(3) LiBr                                       
(4) Lil

A compound contains three elements A, B and C, if the oxidation number of A =+2, B =+5 and C =-2, the possible formula of the compound is :
1. $A_3{\left(B_{4}C\right)}_2$                                 2. $A_3{\left(B{C}_4\right)}_2$
3. $A_2{\left(B{C}_3\right)}_2$                                 4.  $AB{C}_2$

If the ionization enthalpy and negative electron gain enthalpy of an element are 275 and 86 kcal $mo{l}^{-1}$ respectively, then the electronegativity of the element on the Pauling scale is:
1. 2.8                                     
2. 0.0
3. 4.0                                     
4. 2.6

Incorrect statement about characteristics regarding halogens is :
1. Ionization energy decreases with increase in atomic number.
2. Electronegativity decreases with increase in atomic number.
3. Electron affinity decreases with increase in atomic number.
4. Enthalpy of fusion increases with increase in atomic number. 

Consider the following statements:
(I) Rutherford name was associated with the development of periodic table.
(II) A metal M having electronic configuration $1s^2, 2s^2, 2p^6, 3s^2, 3p^6 ,3d^{10}, 4s^1$ is d-block element.
(III) Diamond is  an element.
(IV) The electronic configuration of the most electronegative elements is $1s^2, 2s^2, 2p^5,$ 
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

The correct order among the following options is: 
1. F > N > C > Si > Ga - Non-metallic character.
2. F > Cl > O >N - Oxidising property.
3. C < Si > P > N  - Electron affinity value.
4. All of the above.