ICSE Class 10th Science Chapter 12 - Radioactivity Important Questions with Answers

You should focus on solving ICSE Class 10th Science Chapter 12: Radioactivity important questions, especially to help you score high marks. By solving ICSE Class 10th Science 12 questions, you will be solving exam-oriented questions only.
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Prepare thoroughly with the most important questions of ICSE Class 10th Science Chapter 12 - Radioactivity. You can first cover the ICSE Class 10th Science syllabus to understand the key topics and then start solving the ICSE Class 10th Science Chapter 12 - Radioactivity Important Question to get a better understanding of your preparation level. Start practicing now.

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Question 1.

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Complete the following nuclear changes:

\[\ce {^238_92 P ->\underset{-}-{Q} + ^4_2He->\underset{-}-{R} + ^0_-1e}\]

Question 2.

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Which nuclear radiation will travel undeviated in an electric field?

Question 3.

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How can one stop the radiations escaping from a nuclear reactor in a nuclear power plant?

Question 4.

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Name one internal source of background radiations.

Question 5.

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Which of the following radiations suffer maximum deflection in a magnetic field?

Question 6.

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A radioactive nucleus containing 128 nucleons emits a ?-particle. After ?- emission the number of nucleons present in the nucleus will be ______.

Question 7.

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A radioactive element is placed in an evacuated chamber. Then the rate of radioactive decay will ______.

Question 8.

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Copy and complete the nuclear reaction by filling in the blanks.

\[\ce{_92U^235 + _0n^1 -> _56Ba^{\underline{\phantom{....}}} + \underline{\phantom{..}}Kr^92 + 3 _0n^1}\]

Question 9.

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Complete the following radioactive reaction:

\[\ce{^-_-X -> ^-_-Y + ^4_2He -> ^234_91Z + ^0_-1e}\]

Question 10.

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In the following atoms, which one is a radioisotope? Give one use of this isotope.

O16, C14, N14, He4

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Question 1.

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A nucleus of an atom consists of 146 neutrons and 95 protons. It decays after emitting an alpha particle. How many protons and neutrons are left in the nucleus after an alpha emission?

Question 2.

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Name the radiations that are emitted during the decay of a nucleus, which has highest penetrating power?

Question 3.

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Does the emission of gamma radiation result in a change in the mass number?

Question 4.

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The graph (fig A) illustrates the correlation between the number of protons (x-axis) and the number of neutrons (y-axis) for elements A, B, C, D, and E in the periodic table. These elements are denoted by the letters rather than their conventional symbols. When the element C, depicted in the graph, undergoes radioactive decay, it releases radioactive rays. When these rays are directed into the plane of the paper in the presence of a magnetic field, as indicated in the fig B, they experience deflection, causing them to move upwards.

Name the radioactive radiations emitted by the element C.

Question 5.

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The graph (fig A) illustrates the correlation between the number of protons (x-axis) and the number of neutrons (y-axis) for elements A, B, C, D, and E in the periodic table. These elements are denoted by the letters rather than their conventional symbols. When the element C, depicted in the graph, undergoes radioactive decay, it releases radioactive rays. When these rays are directed into the plane of the paper in the presence of a magnetic field, as indicated in the fig B, they experience deflection, causing them to move upwards.

Identify the daughter element from the graph.

Question 6.

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A radioactive nucleus X emits an alpha particle followed by two beta particles to form nucleus Y.

  1. With respect to the element X, where would you position the element Y in the periodic table?
  2. What is the general name of the elements X and Y?
  3. If the atomic number of Y is 80 then what is the atomic number of X?

Question 7.

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What happens if the negative potential is changed on a grid?

Question 8.

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Name a gas caused by the Greenhouse effect

Question 9.

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What is thermionic emission?

Question 10.

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Name the unit in which the work function of a metal is expressed.

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