List of top Chemistry Questions on Periodic Table asked in CET Delhi Polytechnic

Triads rule was given by:
Mendeleev's Modren periodic law is based on :
Which of the following is a member of the Halogen family ?
The metal most commonly used for making filament of an electric bulb is :
Which of the following is the most electronegative element in the periodic table ?
In the periodic table the position of the element still uncertain is of :
Glucose is broken down to 3-carbon compound called :