1. The atom of which of the following element has the smallest nucleus?
    (a) Nitrogen
    (b) Oxygen
    (c) Hydrogen
    (d) Helium
Ans: (c)
2. Who was the inventor of atomic theory?
    (a) Rutherford
    (b) Madam Curie
    (c) John Dalton
    (d) Albert Einsten
Ans: (c)
3. Nucleon is the name which is used for: [BPSC ASI 2002]
    (a) electron and proton
    (b) proton and neutron
    (c) electron and neutron
    (d) None of these
Ans: (b)
4.    Consider the following: [CSAT-IAS (Pre) 2011]
    1) Carbondioxide
    2) Oxides of Nitrogen
    3) Oxides of Sulphur
      Which of the above is / are the emission / emissions from coal combustion at thermal power plants?
    (a) 1 only
    (b) 2 and 3 only
    (c) 1 and 3 only
    (d) 1, 2 and 3
Ans: (a)
5.    Minerals are: [BPSC 2011]
    (a) liquids
    (b) inorganic solids
    (c) gases
    (d) all of the above
Ans: (b)
6.    The number of neutrons and protons in the nucleus of 88Ra226 are:
    (a) 138 and 88
    (b) 88 and 138
    (c) 226 and 88
    (d) 88 and 226
Ans: (a)
7.    Who was the inventor of radioactivity :
    (a) Madam Curie
    (b) Irine Curie
    (c) Henery Bacqurel
    (d) Rutherford
Ans: (c)
8.    A single type of atom is found in : [BPSC 2011]
    (a) compounds of minerals
    (b) mixture of minerals
    (c) natural elements
    (d) none of the above
Ans: (c)
9.    Which one of the following is negatively charged? [BPSC (Pre) 2002]
    (a) α - rays
    (b) β - rays
    (c) γ-rays
    (d) X-rays