Which of the following metal is highest electropositive (metallic) in nature ?

(1) Be                                       

(2) Rb

(3) Mn                                       

(4) Tl

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. 

Which of the following statements is correct regarding the element Unununium?

1. It is an inner transition element.

2. It belongs to the 8th period in the periodic table.

3. It is a transition element.

4. It is a non-transition element.

The following property/ies decrease from left to right across the periodic table and increase from top to bottom:

(i) Atomic radius (ii) Electronegativity (iii) Ionisation energy (iv) Metallic character

Consider the following information about element P and Q :

                        Period number            Group number

P                               2                                 15

Q                               3                                 2

Then formula of the compound formed by P and Q element is :

(1) PQ         

(2) $P_3{Q}_2$           

(3)$Q_3{P}_2$            

(4)$P{Q}_2$

Incorrect order of radius is :

1. \(  S r^{2 +}   < \left(Rb\right)^{+} < \left(Br\right)^{‐}   < \left(Se\right)^{2 -}                            \)     
2. \(Co > Ni > Cu > Zn\)
3. \(  Co > \left(Co\right)^{2 +} > \left(Co\right)^{3 +} > \left(Co\right)^{4 +}                              \)   
4. \(A s^{3 -} > S e^{2 -} > C s^{+} > B a^{2} +\)

The radius of which ion is closest to that of $L{i}^{+}$ ion ?

1. $N{a}^{+}$                                       

2. $B{e}^{2+}$

3. $M{g}^{2+}$                                       

4. $A{l}^{3+}$

The correct order of ${\mathrm{IE}}_2$ is:

(1) Ne>F>O>N                     

(2) O>F>Ne>N

(3) Ne>O>F>N                     

(4) O>Ne>F>N

Which of the following transformation least energy is required?

(1) ${F^{-}}_{\left(g\right) }\to F_{\left(g\right)} +e^{-}$                 

(2) ${P^{-}}_{\left(g\right)}\to P_{\left(g\right)}+e^{-}$

(3) ${S^{-}}_{\left(g\right)}\to S_{\left(g\right)}+e^{-}$                   

(4) $C{l^{-}}_{\left(g\right)}\to C{l}_{\left(g\right)}+e^{-}$

Which of the following represents correct order of electron affinity?

(1) Cl>F>S>O                           

(2) F>O>S>Cl

(3) F>Cl>S>O                           

(4) Cl>S>O>F