A nucleus with mass number 240 breaks into fragments each of mass number 120. The binding energy per nucleon of unfragmented nuclei is 7.6 MeV while that of fragments is 8.5 MeV. The total gain in the binding energy in the process is:
1. 804 MeV
2. 216 MeV
3. 0.9 MeV
4. 9.4 MeV
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA radioactive nucleus undergoes spontaneous decay in the sequence , where Z is the atomic number of element X. The possible decay particles in the sequence are:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe energy equivalent of 0.5 g of a substance is:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen a uranium isotope is bombarded with a neutron, it generates three neutrons and:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat happens to the mass number and the atomic number of an element when it emits radiation?
1. | Mass number decreases by four and atomic number decreases by two. |
2. | Mass number and atomic number remain unchanged. |
3. | Mass number remains unchanged while atomic number decreases by one. |
4. | Mass number increases by four and the atomic number increases by two. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe half-life of a radioactive sample undergoing \(\alpha- \text{decay}\) is . If the number of nuclei in the sample is , the activity of the sample is nearly equal to:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe rate of radioactive disintegration at an instant for a radioactive sample of half-life 2.2 . The number of radioactive atoms in that sample at that instant is:
1. 3.7
2. 3.17
3. 3.17
4. 3.17
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPrefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPrefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology