Among halogens the highest boiling point is of___________________?
A. Flrorine
B. Chlorine
C. Bromine
D. Iodine
Periodic Classification
Which of the following always increases on going from top to bottom in a group ?
Which of the following always increases on going from top to bottom in a group ?
A. Metallic character
B. Electronegativity
C. Oxidizing power
D. Tendency to get reduced
An element having low value of ionization energy and low value of electron affinity is likely to belong to__________________?
An element having low value of ionization energy and low value of electron affinity is likely to belong to__________________?
A. Group IA
B. Group IB
C. Group VIIA
D. Group VIII
Which of the following cannot exist in solution_________________?
Which of the following cannot exist in solution_________________?
A. O-2
B. H+
C. Cl-
D. Na+
Which one of the following element has highest oxidation state in its compounds ?
Which one of the following element has highest oxidation state in its compounds ?
A. Cr
B. Mn
C. Sn
D. O
True increasing order of acidity of the oxides of Mn is_________________?
True increasing order of acidity of the oxides of Mn is_________________?
A. MnO < MnO2 < Mn2O7
B. Mn2O7 > MnO2 > MnO
C. MnO2 > MnO > Mn2O7
D. MnO2 > Mn2O7 > MnO
Which of the following possesses maximum hydration energy ?
Which of the following possesses maximum hydration energy ?
A. Na+
B. K+
C. Mg+2
D. Ca+2
Melting points of VII-A group elements down the group ____________________?
Melting points of VII-A group elements down the group ____________________?
A. Increase
B. Decrease
C. Remain constant
D. No regular trend
Higher value of electron affinity means__________________?
Higher value of electron affinity means__________________?
A. Atom will lose electron easily
B. Atom will gain electron easily
C. Atom may form di-positive ion
D. The reason is unknown
Shielding effect across the period_________________?
Shielding effect across the period_________________?
A. Increases
B. Decreases
C. Can not be predicted
D. Remains constant