Melting points of VII-A group elements down the group ____________________?
A. Increase B. Decrease C. Remain constant D. No regular trend
Chemistry MCQs
Which of the following possesses maximum hydration energy ?
A. Na+ B. K+ C. Mg+2 D. Ca+2
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 one of the following element has highest oxidation state in its compounds ?
A. Cr B. Mn C. Sn D. O
Which of the following cannot exist in solution_________________?
A. O-2 B. H+ C. Cl- D. Na+
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 always increases on going from top to bottom in a group ?
A. Metallic character B. Electronegativity C. Oxidizing power D. Tendency to get reduced
Among halogens the highest boiling point is of___________________?
A. Flrorine B. Chlorine C. Bromine D. Iodine
The scientist who did not contribute in the construction of periodic table ?
A. Al-Razi B. Moseley C. Dobereiner D. Democritus
Which element was not known when Mendeleev proposed his classification ?
A. Hydrogen B. Sodium C. Copper D. Germanium