Which of the following is NOT an example of an oxidation-reduction reaction? Whi
ID: 927052 • Letter: W
Question
Which of the following is NOT an example of an oxidation-reduction reaction? Which of the following statements concerning acids and bases is TRUE? Which type of radiation emitted by radioactive nuclei is a form of electromagnetic radiation? Which type of radiation has the greatest penetrating power? When a molecule is hit by gamma radiation, which of the following is likely to occur? The isotope^99m_43 decays to ^99 _43Tc by emitting radiation. What type of radiation is emitted? What is the nuclear symbol for the isotope formed when ^36_7N undergoes beta decay? What is the correct nuclear symbol for the unknown product "X" in the nuclear equation shown below?Explanation / Answer
43) option d is correct
An oxidation reduction reaction is defined as an exchange of electrons and doesn't necessarily involve O2
d If it is is just a molecule being dissolved in buffer. There is no oxidation state change so it is not a Redox reaction. However anything that is added that will corrode will go through an oxidation state change (ie Iron will rust). This will be a redox reaction
44) option b is correct
base forms its conjugate acid by exchange of a proton (the hydrogen cation, or H+). Brønsted-Lowry bases are the hydroxide ion, OH-; the anion of any acid; and ammonia, NH3. Many substances such as water, bicarbonate ion, and ammonia can act as either an acid or a base.
45) gamma rays
Ionizing radiation can consist of high speed subatomic particles ejected from the nucleus or electromagnetic radiation (gamma-rays) emitted by either the nucleus or orbital electrons.A nucleus which is in an excited state may emit one or more photons (packets of electromagnetic radiation) of discrete energies
46) gamma radiation. Alpha is easily stopped by paper, while beta particles penetrates a little farther.
47) It takes what, 13eV to ionize hydrogen. That's an x-ray, so sure, gamma radiation is ionizing.
48)gamma rays emite because no lose of mass and atomic number.
49)option b is correct
In this form of decay, the original element becomes a new chemical element in a process known as nuclear transmutation. This new element has an unchanged mass number A, but an atomic number Z that is increased by one. As in all nuclear decays, the decaying element (in this case 16
7O) is known as the parent nuclide while the resulting element (in this case 16
8O) is
50 ) 23490Th will be product because when 42He out from 23892U then mass number and atomic number decrease by 4 and 2
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