Q. The hardest form of carbon is
? Diamond
Q. The most important ore of aluminum is
? Bauxite
Q. The number of electrons presents in H+ is
? Zero
Q. The hottest part of the gas flame is known as
? Non-luminous zone
Q. The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
? Oxygen
Q. The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
? 4
Q. The National Chemical Laboratory is situated in
? Pune
Q. The maximum number of covalent formed by nitrogen is
? 4
Q. The formula C6H5-CO-CH3 represents
? Acetophenone
Q. The metal that is usually extracted from sea water is
? Mg
Q. The inert gases are ____ in water
? Sparingly soluble
Q. The molecular formula of phosphorous is
? P4