in this article we are going to tell you about Physics Lesson:- Nuclear Energy – Fission and Fusion.
Nuclear Energy – Fission and Fusion
Q. The discovery of neutron was made by :
Ans. Rutherford
Q. Radioactivity was discovered by :
Ans. Becquerel
Q. The change present on a neutron is :
Ans. zero
Q. Number of protons in n atom is equal to :
Ans. Atomic number
Q. Atomic number of an element is 11 and its mass numbers is 23 .The number of neutrons in the atom will be :
Ans. 12
Q. How many electrons are present in Na+
Ans. 1
Q. Fusion of hydrogen nuclei occurs when they collide at ;
Ans. very high speed
Q. The temperature at which fusion reaction of hydrogen nuclei occurs is of order of :
Ans. 4×106 deg c
Q. One gram of hydrogen in the sun release energy of :
Ans. 62×109 j
Q. The nucleus of U-235 is highly unstable. Why?
Ans. Due to large distances between nucleons the nuclear force of attraction becomes weak.
Q. When U-235 isotope is bombarded with slow-moving neutrons, it:
Ans. splits into smaller segments
Q. The light of small wavelength emitted during fission of U-235 isotope is known as :
Ans. X-rays
Q. Plutonium (Pu-239)can be made artificially from :
Ans. U-238
Q. During fission of U-235 three more neutrons are produced.These three neutrons strike three U-235 atoms and each atom would release three more and so on.Such multiplying process is called:
Ans. Chain Reaction
Q. The uncontrolled chain reaction a nuclear explosion and is known as:
Ans. Atom bomb
Q. The name of the reaction taking place in hydrogen bomb is a :
Ans. Fusion reaction
Q. A controlled fission reaction is called :
Ans. critical fission reaction
Q. Nuclear reactor is a furnace in which :
Ans. nuclear energy is converted into useful work
Q. The name of the metal used to control fission reaction in nuclear reactor is :
Ans. Cadmium
Q. The name of the state in India where uranium is available:
Ans. Bihar
Q. Name of the city where enrichment of uranium is done :
Ans. Hyderabad
Q. The name of the final form of energy obtained from a nuclear power plant is :
Ans. Electrical energy
Q. Nuclear energy is the results of:
Ans. conversion of mass into energy
Q. Which substance is used a moderator in nuclear reactor :
Ans. Heavy water
Q. Positivity changed particle of mass equal to the mass of an electron is called :
Ans. Positron
Q. Size of the nuclear is of the order of :
Ans. 10-14m
Q. α, β and γ rays emitted from a radioactive source are passed through 0.5 cm thick aluminum sheet.The outgoing radiation will consist of :
Ans. γ rays only
Q. Positron is the particle which has positive change and mass equal to the mass of :
Ans. Electron
Q. The mass of an atom is expressed in :
Ans. a.m.u.
Q. Name of nuclear reaction taking place in the sun is :
Ans. nuclear fusion
Q. Name of the reaction which takes place during explosion of atom bomb :
Ans. Nuclear fission
Q. Name of the reaction which takes place during explosion of hydrogen bomb :
Ans. nuclear fusion
Q. Name of the moderation used to control nuclear reaction ?
Ans. Cadmium
Q. When a beta(β) particle is given out the atomic number of the parent atom :
Ans. Increases by unity
Q. Nuclear fusion cannot be carried in a nuclear reactor because :
Ans. It takes place at a very high temperature
Q. The isotope which can be fissioned easily :
Ans. U-235
Q. Controlled nuclear chain reaction is carried out in :
Ans. nuclear reactor
Q. The process of increasing the percentage of U-238 in U-235 is called :
Ans. Enrichment of nuclear fuel
Q. Radiation hazards can be minimized by :
Ans. using strong radiation absorbents
Q. The name of the coolant used in nuclear reactor is :
Ans. Water
Biology MCQ – Control and Co-ordination
Q. For generating electricity the nuclear reaction used is :
Ans. Nuclear fission reaction
Q. The name of the destructive weapon in which fusion reaction takes place:
Ans. Hydrogen bomb
Q. Amount of energy released during the fission a uranium atom is
Ans. 200Me V
Q. India’s first atomic power station was built at:
Ans. Tarapur
Q. Bhaba Atomic research center (BARC) is situated in:
Ans. Trombay
Q. The moderator in a nuclear reactor :
Ans. slows down the neutron to increases probability of fission
Q. The first nuclear reactor of India is :
Ans. Apsara
Q. When a china reaction takes place in U-235 each nuclear breaks into two parts fission and releases :
Ans. three neutrons
Q. The process by which hydrogen in the sun is converted into helium is called :
Ans. nuclear fusion
Q. Mass of proton is :
Ans. 1.67×10-24 g
Q. The nuclei of isomers of an element contain equal number of :
Ans. neutron
Q. Penetrating power of γrays is :
Ans. more than that of α and β
Q. percentage of U-235 in uranium used in nuclear reactor is :
Ans. 1 to 2%
Q. What is the percentage of U-235 in U-238 :
Ans. 0.7 %
Q. fusion of hydrogen nuclei occurs when they collide at :
Ans. very high speed
Q. The neutron which can induce fission in U-235 should be :
Ans. slow moving
Q. Nuclear reactor is a place where:
Ans. fission reaction is controlled
Q. Which is the correct statement :
Ans. pollution can be minimised by the proper disposed of nuclear waste
Q. Controlled fission reaction is called ;
Ans. critical reaction
Q. The density of a nuclear is of the order of :
Ans. 1017 kg m-3
Q. Which type of process is currently used in nuclear electricity generation?
Ans. nuclear fission