SOLVED

61) Choose the INCORRECT statement. A) Fusion is the basis of the hydrogen bomb. B) Fusion is the splitting of a nucleus into two smaller nuclei. C) Fusion is a reaction that occurs on the sun. D) Fusion is not now used to produce electricity commercially. E) Fusion can produce an almost unlimited amount of energy. 62) Which statement below is correct? A) In order for fusion to be sustained, the critical mass must be exceeded. B) Fission reactions with light nuclei, such as helium are easily controlled but do not produce as much energy as with heavy nuclei. C) Breeder reactors are able to convert fissile nuclides into fertile ones, thus “breeding” more fuel. D) In a pressurized water reactor, cadmium metal usually acts as the moderator. E) requires energetic neutrons in order to undergo fission and subsequently produces . 63) Choose the INCORRECT statement. A) Geiger-Müller counters detect radiation by the ionization caused in the gas in the counter. B) Bubble chambers detect radiation by the ionization trail left by the radiation. C) Radiation causes no harm to the human body. D) Radiation kills cancer cells more easily than normal cells. E) Alpha particles are less penetrating than beta particles. 64) An employee at a chemical laboratory studying radioisotopes would wear a badge to keep a check on the amount of radiation to which he is exposed. This radiation dosage would be measured in the unit: A) curie B) rad C) rem D) Joules E) Joules per kilogram 65) Which of the following instruments would be least suitable for detecting particles given off in radioactive decay? A) electron microscope B) bubble or cloud chamber C) film D) Geiger counter E) Geiger-Müller counter 66) The unit of radiation which is equivalent to 0.010 J/kg of matter is the: A) curie B) roentgen C) rad D) rem E) MeV 67) Radiation can be detected as it interacts with matter by the use of: I)photographic film II)a bubble chamber III)Geiger-Müller counter A) I, II, III B) I and II C) I and III D) II and III E) III only 68) Choose the INCORRECT statement. A) Cancer cannot be caused by ionizing radiation. B) Cancer can be treated with gamma rays. C) Radiation works against cancer because cancer cells are more easily damaged than normal cells. D) Protons, x-rays, and neutrons can also be used against cancer cells. E) Ionizing radiation tends to kill all cells. 69) Choose the INCORRECT statement. A) Radioactive 32P as a phosphate can be used to trace the uptake of phosphorus in plants. B) The thyroid gland can be studied by the use of radioactive iodine. C) There is no difference in physical properties between isotopes. D) The mechanism of a chemical reaction can be followed by a radioactive tracer such as 35S. E) Industrial catalysts can be followed by a tracer such as 192Ir. 70) The type of radioactive emission with the greatest penetrating power is ________. A) alpha B) beta C) gamma D) positron E) neutrino