MCQ On Periodicity
1) Among the following , the third highest Ionization Energy for-
(a) Mg (b) Be
(c) Br (d) Al
Ans:- (b) Beryllium
2) Which of the following element has maximum, first ionization potential-
(a) V (b) Ti
(c) Cr (d) Mn
Ans:- (d) Mn
3) Among the following represent correct order of Electron affinity-
(a) Be < B < C < N (b) Be < N< B < C
(c) N< C < B < Be (d) N< Be < C < B
Ans (b) Be < N< B < C
4) If electronegativity of 'x' be 3.2 and the 'y' be 2.2 , the percentage of ionic character of xy bond is---
(a) 19.5 (b) 18.5 (c) 9.5 (d) 29.5
Ans:- (a) 19.5
5) Which oxide of N is isoelectronic with Co2?
(a) NO2 (b) NO (c) N2O (d) N2O5
Ans (c) N2O
6) The element which exist in liquid state at room temperature is/are-
(a) Na (b) Br2 (c) Hg (d) Ga
Ans (b, c)
7) When moving down the group in preodic table from Cl to I , which of the following properties decreases ?
(a) Ionic radius
(b) Ionization energy
(c) Oxidizing power
(d) Electronegativity
Ans (b, c, d)
8) Which is most soluble in water?
(a) Be(OH)2 (b) Mg(OH)2
(c) Ca(OH)2 (d) Sr(OH)2
Ans-(d) Sr(OH)2
9) Correct order of Electron affinity is/are--
(a) S> O (b) Al> B
(c) Mg> Na (d) P> N
Ans- (a , b, d)
10) Among the following , the 1st highest electron affinity for
(a) F (b) N (c) P (d) O
Ans (a) F
11) Highest covalent character is found in which of the following?
(a) CaF2 (b) CaCl2
(c) Cal2 (d) CaBr2
Ans:- (c) Cal2
12) Be is diagonally related to Al because of Similar-
(a) Charge
(b) Electron gain enthalpy
(c) Electronegativity
(d) Atomic size
Ans-(c) Electronegativity
13) Which of the following is the Strongest acidic oxide is-
(a) CO2 (b) N2O5
(c) P2O5 (d) SiO2
Ans:-(b) N2O5
14) Which atomic number represent a metal is-
(a) 32 (b) 34 (c) 36 (d) 38
Ans:-(d) 38
15) Which elements represent analogous to the lanthanide's -
(a) Actinides (b) Borides
(c) Carbides (d) Hydrides
Ans:-(a) Actinides
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