∙ Combustion reactions are exothermic.
This statement is generally true.
∙ For exothermic reaction, the energy content of the reactants is
higher than the energy content of the products.
∴Statement I is true, Statement II is false.
Statement I: Band gap in germanium is small.
Statement II: The energy spread of each germanium atomic energy level is infinitesimally small. (J2007, 3M)
Read the following questions and answer as per the directions given below:
Statement – I: The first ionization energy of Be is greater than that of B.
Statement – II: 2p-orbital is lower in energy than 2s.
Statement - I: Cl− and Ca2+ are isoelectronic species. Statement - II: Isoelectronic species should have same charges.