The longest period in the modern periodic table is___________________?

A. 6th
B. 7th
C. 2nd and 3rd both
D. 5th

Seventh period contains _________________ normal elements ?

A. 2
B. 4
C. 6
D. 8

Modern periodic table has been divided in ___________ blocks?

A. 2
B. 4
C. 8
D. 7

Amphoteric exides are those which possess ____________ properties?

A. Acidic
B. Basic
C. Acidic and basic
D. Neutral and acidic

Hydrogen resembles with carbon because of having________________?

A. Same number of electrons in the valence shell
B. Similar physical state
C. Remarkable reducing properties
D. Homovalent (show same valency)

In which of the following pairs are elements belonging to the same group ?

A. Boron & beryllium
B. Nitrogen & phosphorous
C. Magnesium & aluminium
D. Gallium & helium

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 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