A:  +1 B:  +2 C:  Zero D:  -1

A:  Carbohydrate B:  Water  C:  Natural gas D:  petrol

A:  sodium (Na) B:  Potassium (K) C:  Calcium (Ca) D:  Iron (Fe)

A:  Atomic number B:  Number of electron C:  number of neutron  D:  electron and neutron

A:  [H] B:  KMnO4 C:  H2O2 D:  K2Cr2O7

A:  through collection of information B:  by thoughtful considerations C:  By coordinating with the previous information D:  by all three factors mentioned above

A:  observation B:  Experiment C:  comparison with scientific laws D:  comparison with other theories

A:  Is created by  an idol B:  comes into begin on its own C:  is created by Almighty Allah D:  Is imaginary

A:  Fact  B:  theory C:  principle or law D:  knowledge of science

A:  Al-Jahiz B:  Berzellius C:  Jabir Bin Haiyan D:  Aristotle