Description : For a chain reaction occur each fission must produce at least ____more fission reaction?
Last Answer : 1::::: APEX (I Just took the test)
Description : If For a sustainable fission reaction each fission must produce exactly how many additional fission reaction(s).?
Last Answer : To sustain a fission chain reaction, each fission reaction must result in one more fission reaction. And that one should result in one more, and so on.
Description : If For a sustainable fission reaction each fission must produce exactly additional fission reaction(s).?
Last Answer : A stable nuclear fission reaction will be sustained if every fission produces one additional fission reaction.
Description : A nuclear reactor harnesses nuclear energy by A. Nuclear fusion B. Spontaneous fission C. Uncontrolled chain reaction D. Controlled chain reaction
Last Answer : ANSWER: D
Description : Which of the following can be used to absorb neutrons to control the chain reaction during nuclear fission? (1) Boron (2) Heavy water (3) Uranium (4) Plutonium
Last Answer : (1) Boron Explanation: Boron shielding is used as a control for nuclear reactors, taking advantage of its high cross-section for neutron capture. Elemental boron is rare and ... aluminium. Crystalline boron is chemicallyinert and resistant to attack by boiling hydrofluoric or hydrochloric acid.
Description : wo elements which are used to absorb neutrons to control the chain reaction during nuclear fission are - (1) Boron and Cadmium (2) Boron and Plutonium (3) Cadmium and Uranium (4) Uranium and Boron
Last Answer : (1) Boron and Cadmium Explanation: Since the continued chain reaction of a nuclear fission reactor depends upon at least one neutron from each fission being absorbed by another fissionable nucleus, the ... and then the control rods are slowly lifted until a chain reaction can just be sustained.
Description : Name the particle that is most essential to continue the chain reaction during the fission of uranium - (1) Electron (2) Proton (3) Neutron (4) Positron
Last Answer : (3) Neutron Explanation: Nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei), often producing ... in the modern world is usually a deliberately produced manmade nuclear reaction induced by a neutron.
Description : What is the difference between nuclear fission and fission chain reaction.
Last Answer : The process of splitting of nucleus into two almost equal fragments accompanied by re¬lease of heat is nuclear fission. Self sustained, continuing, sequence of fission reactions in a con¬trolled manner is fission chain reaction.
Description : The main purpose of control rod in a nuclear reactor is to control the (A) Chain reaction and hence the power output by regulating the number of secondary neutrons causing fission (B) ... radiation (C) Conversion of fissile material into fertile material (D) Velocity of the secondary neutrons
Last Answer : (A) Chain reaction and hence the power output by regulating the number of secondary neutrons causing fission
Description : The two elements which are used to absorb the neutrons in nuclear fission during chain reaction
Last Answer : Boran and Cadmium
Description : Name the particle that is most essential to continue the chain reaction during the fission of uranium- (1) Electron (2) Proton (3) Neutron (4) Positron
Last Answer : Neutron
Description : Which of the following can be used to absorb neutrons to control the chain reaction during nuclear fission ? (1) Boron (2) Heavy water (3) Uranium (4) Plutonium
Last Answer : Boron
Description : Two elements which are used to absorb neutrons to control the chain reaction during nuclear fission are (1) Boron and Cadmium (2) Boron and Plutonium (3) Cadmium and Uranium (4) Uranium and Boron
Last Answer : Boron and Cadmium
Description : How are Williams's Landscape with the Fall of Icarus and Auden's Mus and eacutee des Beaux Arts different?
Last Answer : In Williams's poem, a farmer is the only witness to Icarus's fall, while Auden mentions both a ploughman and a ship.
Description : What do Icarus's tragedy and people's responses to it represent in Auden's Mus and eacutee des Beaux Arts?
Last Answer : How normal suffering is.
Description : Which part of brain is also known as "little brain"? (1) Cerebrum (2) Cerebellum (3) Thalamus (4) Hypothala mus
Last Answer : (2) Cerebellum Explanation: The cerebellum is known as little brain. It is a region of the brain that plays an important role in motor control. It may also be involved in some ... , and in regulating fear and pleasure responses, but its movementrelated functions are the most solidly established.
Description : Why is the halogenation of alkanes considered a chain reaction? (a) it occurs quickly. (b) it occurs without the generation of intermediates. (c) each step generates the reactive intermediate that causes the next step to occur. (d) the reaction allows long chains of halogenated alkanes to be formed
Last Answer : each step generates the reactive intermediate that causes the next step to occur
Description : The particle required to continue the chain process of Uranium fission is – (1) Electron (2) Proton (3) Neutron (4) Positron
Last Answer : (3) Neutron Explanation: Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission ... rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
Description : The particle required to continue the chain process of Uranium fission is : (1) Electron (2) Proton (3) Neutron (4) Positron
Description : Because uranium 235 isn't found naturally in large quantities, engineers increase its concentration in nuclear fuel so that a chain reaction is more likely to occur. What is the name of this process?
Last Answer : Enrichment
Description : Mention the four events that occur during binary fission in Amoeba.
Last Answer : Mention the four events that occur during binary fission in Amoeba.
Description : In what part of a nuclear power plant does nuclear fission occur?
Last Answer : The reactor core is the location where fission reactions takeplace. More specifically, it's inside the nuclear fuel that thosefission reactions occur.
Description : The cell reproduction in bacteria may occur by A.binary fission B.budding C.fragmentation D.all of these
Last Answer : D.all of these
Description : What purpose does FeCl3 serve in the electrophilic aromatic substitution reaction between chlorine and benzene? (a) It serves as a radical initiator to produce the chlorine radical needed to propagate the ... by reacting with the Cl2 and thereby activates it toward attack by benzene's π electrons.
Last Answer : It serves as a Lewis acid catalyst by reacting with the Cl2 and thereby activates it toward attack by benzene’s π electrons.
Description : Nuclear reactors used to produce electricity are based on – (1) Nuclear fission (2) Nuclear fusion (3) Cold fusion (4) Superconductivity
Last Answer : (1) Nuclear fission Explanation: A nuclear reactor is a device to initiate and control a sustained nuclear chain reaction. Most commonly they are used for generating electricity and for the propulsion ... (water or gas), which runs through turbines that power either ship's propellers or generators.
Description : Homolytic fission of covalent bond between carbon atoms will produce : (a) Two carbonium ions (b) Two molecules (c) Free radicals (d) Carbonium ion and carbanion
Last Answer : Free radicals
Description : In a nuclear power reactor, fission produces heat which is used to produce electricity. A reactor producing more fissionable material than it consumes is known as what kind of reactor?
Last Answer : ANSWER: BREEDER REACTOR
Description : Nuclear reactors used to produce electricity are based on (1) nuclear fission (2) nuclear fusion (3) cold fusion (4) superconductivity
Last Answer : nuclear fission
Last Answer : The process by which a nucleus of a large and heavy element breaks down into a nucleus of a smaller element is called a nuclear fission reaction.
Description : The reaction `._(92)U^(235) + ._(0)n^(1) rarr ._(56)Ba^(140) + ._(36)Kr^(93) + 3 ._(0)n^(1)` represents a)Artificial radioactivity b)Nuclear fission c
Last Answer : The reaction `._(92)U^(235) + ._(0)n^(1) rarr ._(56)Ba^(140) + ._(36)Kr^( ... radioactivity B. nuclear fission C. nuclear fussion D. none of the above
Description : A reaction develop nuclear energy at the rate of `3 xx 10^(4) kW`. How many atoms of `.^(215)U` undergo fission per second? How much `.^(235)U` is bur
Last Answer : A reaction develop nuclear energy at the rate of `3 xx 10^(4) kW`. How many atoms of `.^(215)U` ... constant is `6.023 xx 10^(26)` per kg mole)
Description : In a nuclear fission reaction a freely moving neutron?
Last Answer : In a nuclear fission reaction, a freely moving neutron undergoes neutron capture and initiates the nuclear fission of a fuel atom.
Description : Hydrogen bomb is based upon the principle of ______. (1) Nuclear fission (2) Nuclear fusion (3) Controller nuclear reaction (4) None of these
Last Answer : (2) Nuclear fusion Explanation: The hydrogen bomb eventually relies upon atomic fusion (adding to the atomic nucleus) to release energy. Nuclear fusion is a nuclear reaction in which two or more atomic nuclei ... and then collide at a very high speed and join to form a new type of atomic nucleus.
Description : The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called - (1) Nuclear fusion (2) Nuclear fission (3) Nuclear reaction (4) Fast breeding
Last Answer : (2) Nuclear fission Explanation: Nuclear fission is a process used to create energy. It is when an atom splits apart into smaller atoms. The process gives off a lot of energy, and is used in nuclear weapons and nuclear reactors.
Description : Hydrogen bomb is based on the principle of – (1) controlled fission reaction (2) uncontrolled fission reaction (3) controlled fusion reaction (4) uncontrolled fusion reaction
Last Answer : (4) uncontrolled fusion reaction Explanation: A thermonuclear weapon is a nuclear weapon design that uses the heat generated by a fission bomb to compress a nuclear fusion stage which indirectly ... the majority of its destructive energy comes from uranium fission, not hydrogen fusion by itself.
Description : Which of the following reaction is the main cause of energy radiated from Sun? (1) Nuclear fission (2) Nuclear fusion (3) Chemical reaction (4) Diffusion reaction
Last Answer : (2) Nuclear fusion Explanation: The Sun is a main-sequence star, and thus generates its energy bynuclear fusion of hydrogen nuclei into helium. In its core, the Sunfuses 620 million metric tons of hydrogen each second.
Description : The Solar energy produced by – (1) Fusion reaction (2) Fission reaction (3) Combustion reaction (4) None
Last Answer : (1) Fusion reaction Explanation: The Sun is amain-sequence star, and thus generates its energy by nuclear fusion of hydrogen nuclei into helium. In its core, the Sun fuses 620 million metric tons of hydrogen ... come very close and then collide at a very high speed and join to form a new nucleus.
Description : Which type of reaction produces the most harmful radiation? (1) Fusion reaction (2) Fission reaction (3) Chemical reaction (4) Photo-Chemical reaction
Last Answer : (2) Fission reaction Explanation: Radiation is one of the byproducts of radioactive decay of unstable atomic nuclei. Nuclear fission is the process on which the operation of most nuclear power plants ... , the nucleus splits into two smaller nuclei of roughly (though not exactly) equal sizes.
Description : The energy emitted by the Sun is due to (1) Chemical reaction (2) Nuclear fission (3) Nuclear fusion (4) All of the above
Last Answer : (3) Nuclear fusion Explanation: The spectrum of the Sun's solar radiation is close to that of a black body with a temperature of about 5,800 K. The Sun emits Electromagnetic radiation across ... converted to lower energy photons before they reach the Sun's surface and are emitted out into space.
Description : Which of the following undergoes fission reaction easily? (A) U-235 (B) U-238 (C) Th-232 (D) None of these
Last Answer : (A) U-235
Description : Solar energy results from __________ reaction. (A) Fission (B) Combustion (C) Thermonuclear (D) None of these
Last Answer : (C) Thermonuclear
Description : How is controlled fission reaction achieved?
Last Answer : Nuclear fission reaction produces more than two neutrons. Excess of neutrons are absorbed so that the number of neutrons per fission is regulated to around one neutron per fission.
Description : In a fission nuclear reaction , a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear ... reaction C. Fission nuclear reaction D. Fusion nuclear reaction (Answer) E. None of these
Last Answer : D. Fusion nuclear reaction (Answer)
Description : Pick out the wrong statement. (A) Geothermal energy is a non-conventional source of energy (B) Mass is converted into energy in both nuclear fission & fusion reaction (C) Inhalation of mercury vapour is not harmful for human beings (D) Inhalation of arsenic causes cancer
Last Answer : (C) Inhalation of mercury vapour is not harmful for human beings
Description : In the fission of U235, what is the average number of neutrons produced in the fission reaction? w) 1.5 x) 2.5 y) 3.5 z) 4.5
Last Answer : ANSWER: X -- 2.5
Description : Of the following, which non-fissioning element is used in the cooling water of nuclear power plants to help control the rate of the fission reaction by absorbing neutrons: w) zirconium x) boron y) krypton z) cesium
Last Answer : ANSWER: X -- BORON
Description : Hydrogen bomb is based on the principle of (1) controlled fission reaction (2) uncontrolled fission reaction (3) controlled fusion reaction (4) uncontrolled fusion reaction
Last Answer : uncontrolled fusion reaction
Description : The Solar energy produced by (1) Fusion reaction (2) Fission reaction (3) Combustion reaction (4) None
Last Answer : Fusion reaction
Description : Which type of reaction produces the most harmful radiation ? (1) Fusion reaction (2) Fission reaction (3) Chemical reaction (4) Photo-Chemical reaction
Last Answer : Fission reaction