CBSE Class 12 Physics VBQs Atoms and Nuclei Set B

CBSE Class 12 Physics VBQs Atoms and Nuclei Set B read and download in pdf. Value Based Questions come in exams for Physics in Standard 12 and are easy to learn and helpful in scoring good marks. You can refer to more chapter wise VBQs for Class 12 Physics and also get latest topic wise very useful study material as per latest 2021 NCERT book for Class 12 Physics and all other subjects for free on Studiestoday designed as per latest Grade 12 CBSE, NCERT and KVS syllabus and examination pattern

Value Based Questions

1. Ruchi’s uncle who was a kabadiwalah was getting weak day by day. His nails were getting blue, he stated losing his hair. This happened immediately after he purchased a big container of heavy mass from Delhi University Chemistry Department. Doctors advised him hospitalization and suspected he has been exposed to radiation. His uncle didn’t know much about radiations but Ruchi immediately convinced her uncle to get admitted and start treatment.
(i) What according to you are the values utilized by Rama to convince her uncle to get admitted in hospital
(ii)Name the radioactive radiations emitted from a radioactive element
Ans 1. (i) Value displayed - awareness, critical thinking, decision making
(i) X ray and Gamma rays.
 
2. Medha’s grandfather was reading article is newspaper. He read that after so many years of atomic bombing is Hiroshima or Nagasaki, Japan National census indicated that children born even now are genetically deformed. His grandfather was not able to understand the reason behind it. He asked his Granddaughter Medha who is studying in class XII science. Medha sat with her grandfather and showed him pictures from some books and explained the harmful effects of radiations.
(i) What are the values/ skills utilized by kajal to make her grandfather understand the reason of genetically deformity?
(ii) Name the nuclear reactions that occurred is atom bomb.
Ans 2. (i) Sympathy, compassion
(ii) Nuclear- fission reactions
 
3. Muthuswami a resident of Kundakulam was all set to leave everything and shift to another place in view of the decision of Govt. to start nuclear thermal power plant at Kundakulam. His granddaughter Prachi, a science student, was really upset on the ignorant decision of her grandfather. She could finally convince him not to shift, since adequate safety measures to avoid any nuclear mishap have already been taken by the Govt. before starting nuclear thermal plants.
• What is the value displayed by Prachi in convincing her grandfather
• What is the principle behind working of nuclear reactor
• What are the main components of nuclear reactor
• Why is heavy water used as moderator?
Ans 3: (i) Awareness, social responsibility
(ii) Controlled chain reaction
(iii)Nuclear Fuel, Moderator, Control rods, Coolant, Shielding
(iv) Neutrons produced during fission get slowed if they collide with a nucleus of same mass. As ordinary water contains hydrogen atoms so it can be used as a moderator. But it absorb neutron at a fast rate. To overcome this difficulty, Heavy waters is used as a moderator which has negligible cross sections for neutron absorption

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