List of top Chemistry Questions asked in CET Delhi Polytechnic

The Avogadro constant $6.022140857 \times 10^{23$ is defined as the number of atoms present in exactly 12 g of ..........}
The Law of Conservation of Mass-During a chemical reaction ____ .
Vinegar, used in kitchen is a dilute solution of :
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
Metal, which will displace hydrogen from dilute HCl is :
The number of electrons in an element X is 6 and the number of neutron is 8. Which of the following is the correct representation of the element ?
The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion ?
Isotopes of an element have :
Which of the following has maximum number of atoms ?

The names of the elements present in quick lime are : 
(i) Ca (ii) H  (iii) O (iv) C

The most pure form of Iron is :
The property of carbon element responsible for a large number of organic compounds is :
Which of the following is a natural polymer ?
The most abundant element found in the earth's crust is :
The red colouring pigment Haemoglobin in our blood contains which metal ?
Calamine is an ore of which of the following ?
Which of the following organic compounds will exhibit Geometrical Isomerism ?
Sodium metal is usually stored under :
Galvanized Iron (GI) sheets are coated with :
Which of the following is a member of the Halogen family ?
Which was the first organic compound synthesized in the laboratory ?
When water is poured over sodium peroxide, which colourless gas is produced ?
Natural Rubber obtained from Rubber tree is basically a polymer of :
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 ?