List of top Chemistry Questions

Sodium metal is usually stored under :
The red colouring pigment Haemoglobin in our blood contains which metal ?
Calamine is an ore of which of the following ?
The most abundant element found in the earth's crust is :
Galvanized Iron (GI) sheets are coated with :
Which was the first organic compound synthesized in the laboratory ?
When water is poured over sodium peroxide, which colourless gas is produced ?
Metal, which will displace hydrogen from dilute HCl is :
The metal most commonly used for making filament of an electric bulb is :
Natural Rubber obtained from Rubber tree is basically a polymer of :
Which of the following is a member of the Halogen family ?
Vinegar, used in kitchen is a dilute solution of :
Select from the following a set of three metals which are found in free state :
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 ?
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 most abundant gas found in the earth atmosphere is :
The gas which may cause explosion in coal mines is :
Which of the following is the most electronegative element in the periodic table ?
Isotopes of an element have :
Which of the following has maximum number of atoms ?
A gel toothpaste is a mixture of a :
The Chemical symbol for tin is :
During summer, water kept in an earthern pot becomes cool because of the phenomenon of :
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
The compound that can be purified by sublimation is :