Discuss the below:
Q1: When HNO3 is added to HCN(aq), the CN^- concentration is:
(a) increased (b) decreased (c) not changed
Q2: For each of the following processes, state whether nuclear fission, nuclear fusion, or neither fission nor fusion is occurring:
(a) production of energy in the interior of the sun
(b) burning of gasoline
(c) explosion of the atomic bomb at Hiroshima in 1945
(d) production of electricity at the Indian point nuclear power plant
Q3: State whether the statements are true or false.
1. If a process is reversible, there is no change in the entropy of the universe.
2. Samples of the same polymer may have different average molecular weights.
3. The half-life of a reagent is the amount of time required for the concentration of that reagent to drop to ½ its original value.
4. For a system at equilibrium, the reaction quotient equals the equilibrium constant.
5. An Arrhenius base generates an excess of OH- ions in solution.
6. A buffer solution is formed by adding a large excess of acid to a solution containing its conjugate base.
7. When a weak acid is titrated against a strong base, the equivalence point occurs at a pH greater than 7.