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Solution


Q.

Match List I with List II

  List-I   List-II
  (Elements)   (Properties in their respective groups)
A. Cl, S I. Elements with highest electronegativity
B. Ge, As II. Elements with largest atomic size
C. Fr, Ra III. Elements which show properties of both metals and non-metal
D. F, O IV. Elements with highest negative electron gain enthalpy

 

Choose the correct answer from the options given below :                     [2024]
1 A-IV, B-III, C-II, D-I  
2 A-III, B-II, C-I, D-IV  
3 A-II, B-I, C-IV, D-III  
4 A-II, B-III, C-IV, D-I  

Ans.

(1)

(A) 

Group Electron gain enthalpy becomes less negative in the order
16 S>Se>Te>Po>O
17 Cl>F>Br>I

 

(B)    Ge and As are metalloids

(C) 

Group Atomic radius increases down the group
1 H<Li<Na<K<Rb<Cs<Fr
2 Be<Mg<Ca<Sr<Ba<Ra

 

(D)  Order of electronegativity values for few elements in periodic table is:

 F>O>N=Cl>Br>I=S=C>P=H