The soul of chemistry is dealing with
A. Internal structural changes in matter B. Composition of matter C. Properties of matter D. Composition and properties of matter
Elements found in D-block of the periodic table are known as
A. Noble gases B. Transition elements C. Alkalis D. Acids
A number which is assigned to each atom or ion in a compound which explains its degree of oxidation is called
A. Oxidation state only B. Oxidation number C. Oxidation degree only D. Oxidation state and number
Equal masses of methane and oxygen are mixed in empty container at 250-degree C. The fraction of total pressure exerted by oxygen will be
A. One/seventeen B. Sixteen/seventeen C. One/three D. Two/three
Isotopes differs in ————-?
A. Arrangement of electrons in orbitals B. Position in the periodic table C. Properties depend upon mass D. Chemical properties
The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits
A. Ethylene iodide B. Ethylene bromide C. Ethylene chloride D. Ethylene fluoride
In a sample of a substance, at any given temperature the energy of all particles will
A. Not be same B. Be same C. Equal D. Constant