Chemistry - June 2011

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

(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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