Chemistry - June 2011

27 In which laboratory process is a volume of solution of known concentration used to determine the concentration of another
solution?

(1) deposition    (3) filtration
(2) distillation    (4) titration

29 Energy is released during the fission of Pu-239 atoms as a result of the

(1) formation of covalent bonds
(2) formation of ionic bonds
(3) conversion of matter to energy
(4) conversion of energy to matter

30 Atoms of I-131 spontaneously decay when the

(1) stable nuclei emit alpha particles
(2) stable nuclei emit beta particles
(3) unstable nuclei emit alpha particles
(4) unstable nuclei emit beta particles

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