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Q) Which particle is emitted during beta-minus decay?
Correct Answer - Option
(B)
Explanation:
During beta-minus decay, a neutron converts into a proton and an electron is emitted.
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Q) What is the function of a control rod in a nuclear reactor?
Correct Answer - Option
(C)
Explanation:
Control rods made of materials like cadmium or boron absorb excess neutrons to control the chain reaction.
T
Q) Which element is commonly used as fuel in fusion reactions?
Correct Answer - Option
(A)
Explanation:
Deuterium (heavy hydrogen) and tritium are used as fuel in nuclear fusion reactions.
T
Q) What is the main product formed in the fusion of two deuterium nuclei?
Correct Answer - Option
(A)
Explanation:
When two deuterium nuclei fuse, they form helium and release energy.
T
Q) Which of the following devices is used to detect and measure radiation?
Correct Answer - Option
(B)
Explanation:
The Geiger-Müller counter detects and measures ionizing radiation such as alpha, beta, and gamma rays.
T
Q) What is the half-life of a radioactive substance?
Correct Answer - Option
(B)
Explanation:
Half-life is the time required for half of the radioactive nuclei in a sample to decay.
T
Q) Which scientist proposed the law of radioactive decay?
Correct Answer - Option
(B)
Explanation:
Rutherford formulated the law of radioactive decay, relating decay rate to the number of undecayed nuclei.
T
Q) Which radiation is positively charged?
Correct Answer - Option
(A)
Explanation:
Alpha particles carry a +2 charge because they consist of two protons and two neutrons.
T
Q) Which radioactive element is used for carbon dating?
Correct Answer - Option
(B)
Explanation:
Carbon-14 is used to estimate the age of fossils and archaeological specimens.
T
Q) In which part of the sun does nuclear fusion take place?
Correct Answer - Option
(A)
Explanation:
Nuclear fusion in the Sun occurs in its core, where temperature and pressure are extremely high.
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