Description : Let us consider emission of `alpha`particle from uranium nucleus: `._(92)^(235)U - ._(2)He^(4) to ._(90)Th^(231)` `{:(e = 92, e = 0, e = 90),(p = 92,
Last Answer : Let us consider emission of `alpha`particle from uranium nucleus: `._(92)^(235)U - ._( ... evolve energy C. annihilation D. absorption in the nucleus
Description : `.^(234)U` has 92 protons and 234 nucleons total in tis nucleus. It decays by emitting an alpha particle. After the decay it becomes:
Last Answer : `.^(234)U` has 92 protons and 234 nucleons total in tis nucleus. It decays by emitting an alpha particle. After the ... C. `.^(230)Th` D. `.^(230)Ra`
Description : The isotope `._(92)^(235)U` decays in a number of steps to an isotope of `._(82)^(207)Pb`. The groups of particle emitted in this process will be:
Last Answer : The isotope `._(92)^(235)U` decays in a number of steps to an isotope of `._(82)^(207)Pb`. The groups ... C. `7 alpha, 4 beta` D. `10 alpha, 8 beta`
Description : In the transformation of `""_(92)""^(238)U` to `""_(92)""^(234)U`, if one emission is an `alpha` particle, what should be the other emission(s)? a)Two
Last Answer : In the transformation of `""_(92)""^(238)U` to `""_(92)""^(234)U`, if one emission is an `alpha` ... `gamma` D. one `beta^(+)` and one `beta^(-)`
Description : Radioactive isotope of Uranium used in Nuclear Bomb is ? A.92 U 235 (Answer) B.92 U 234 C. 92 U 233 D. 92 U 238
Last Answer : A.92 U 235 (Answer)
Description : Uranium `._(92)U^(238)` decayed to `._(82)Pb^(206)`. They decay process is `._(92)U^(238) underset((x alpha, y beta))(rarr ._(82)Pb^(206))` `t_(1//2)`
Last Answer : Uranium `._(92)U^(238)` decayed to `._(82)Pb^(206)`. They decay process is `._(92)U^(238) underset((x alpha ... 2.303)/(4.5 xx 10^(9)) xx 0.693 log 4`
Last Answer : Uranium `._(92)U^(238)` decayed to `._(82)Pb^(206)`. They decay process is `._(92)U^(238) underset((x alpha, ... be A. 5.25 B. 0.125 C. 12.5 D. 1.25
Description : `._(92)U^(238)` emits `8 alpha-` particles and `6 beta-` particles. The `n//p` ratio in the product nucleus is a)`(62)/(41)` b)`(60)/(41)` c)`(61)/(42
Last Answer : `._(92)U^(238)` emits `8 alpha-` particles and `6 beta-` particles. The `n//p` ratio in the product nucleus ... A. 60/41 B. 61/40 C. 62/41 D. 61/42
Description : A nucleus X, initially at rest , undergoes alpha dacay according to the equation , ` _(92)^(A) X rarr _(Z)^(228)Y + alpha ` (a) Find the value of `A`
Last Answer : A nucleus X, initially at rest , undergoes alpha dacay according to the equation , ` _(92)^(A) X rarr _(Z)^(228)Y + ... u , m (_(1)^(1) H) = 1.008 u `
Description : Which among the following `"is"//"are"` fissible? a)`._(92)U^(235)` b)`._(92)U^(238)` c)`._(94)Pu^(239)` d)`._(94)Pu^(238)`
Last Answer : Which among the following `"is"//"are"` fissible? a)`._(92)U^(235)` b)`._(92)U^(238)` c)`._(94)Pu^(239)` ... ` C. `._(94)^(239)Pu` D. `._(94)^(238)Pu`
Description : The isotope used for the production of atomic energy is - (1) U-235 (2) U-238 (3) U-234 (4) U-236
Last Answer : (1) U-235 Explanation: U235 is an isotope of uranium making up about 0.72% of natural uranium. Unlike the predominant isotope U238 it is fissile, i.e., it can sustain fission chain reaction. It ... critical, and the mass of U required to produce the critical condition is said to be a critical mass.
Description : The isotope used for the production of atomic energy is (1) U-235 (2) U-238 (3) U-234 (4) U-236
Last Answer : U-235
Description : Assertion `(A):` `._(92)U^(238) (IIIB)overset(-alpha)rarrAoverset(-alpha)rarrB overset(-beta)rarrC` Reason `(R):` Element `B` will be of `II A ` group
Last Answer : Assertion `(A):` `._(92)U^(238) (IIIB)overset(-alpha)rarrAoverset(-alpha)rarrB overset(-beta)rarrC` Reason ... D. If both (A) and (R ) are incorrect.
Description : `._(92)^(238)U` atom distintgrates to `._(84)^(214) Po` with a half life of `4.5xx10^(9)` years by emitting six alpha particles and n electrons. Here
Last Answer : `._(92)^(238)U` atom distintgrates to `._(84)^(214) Po` with a half life of `4.5xx10^(9)` years by emitting ... . Here n is - A. 6 B. 4 C. 10 D. 7
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 : Which of the following isotopes is not present in natural uranium? (A) U-238 (B) U-234 (C) U-235 (D) U-232
Last Answer : (D) U-232
Description : Calculate the energy released by fission of 1 g of `._(92)^(235)U`, assuming that an energy of 200 MeV is released by fission of each atom of `.^(235)
Last Answer : Calculate the energy released by fission of 1 g of `._(92)^(235)U`, assuming that an energy of 200 MeV is ... `= 6.023 xx 10^(26) kg mol^(-1)`)
Description : `""_(92)U^(235)` nucleus absorbs a neutron and disintegrates into `""_(54)Xe^(139) .""_(38)Sr^(94)` and X. What will be the product X ?
Last Answer : `""_(92)U^(235)` nucleus absorbs a neutron and disintegrates into `""_(54)Xe^(139) .""_(38) ... B. 2-neutrons C. `alpha`-particles D. `beta`-particle
Description : The total number of `alphaandbeta` particles emitted in the nuclear reaction `""_(92)^(238)Uto""_(82)^(214)Pb` is
Last Answer : The total number of `alphaandbeta` particles emitted in the nuclear reaction `""_(92)^(238)Uto""_(82)^(214)Pb` is
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 : The radioactive nuclide `._(90)^(234) Th` shows two successive `beta-` decay followed by one `alpha-` decay. The atomic number and mass number respect
Last Answer : The radioactive nuclide `._(90)^(234) Th` shows two successive `beta-` decay followed by one `alpha-` ... is: A. 92234 B. 94230 C. 90230 D. 92230
Description : Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is (A) 3 (B) 235 (C) 200 (D) 92
Last Answer : (A) 3
Description : Which of the following nuclei are doubly magic? a)`._(92)U^(238)` b)`._(2)He^(4)` c)`._(8)O^(16)` d)`._(82)Pb^(208)`
Last Answer : Which of the following nuclei are doubly magic? a)`._(92)U^(238)` b)`._(2)He^(4)` c)`._(8)O^(16)` d)`._( ... O` C. `._(82)^(208)Pb` D. `._(92)^(238)U`
Description : Out of the following, nucleus of __________ atom contains the largest number of neutrons. (A) U-235 (B) U-238 (C) U-239 (D) Pu-239
Last Answer : (C) U-239
Description : The largest stable nucleus is (A) U-235 (B) U-238 (C) Pb-206 (D) Bi-209
Description : The number of `alpha`-and `beta`-particles emitted in the nuclear reaction, `._(90)Th^(228) to ._(83)Bi^(212)`, respectively are
Last Answer : The number of `alpha`-and `beta`-particles emitted in the nuclear reaction, `._(90)Th^(228) to ._(83)Bi^( ... ` and `1 beta` D. `4 alpha` and `7 beta`
Description : The number of `alpha` and `beta`-particles emitted in the nuclear reaction `._(90)^(210) Th to ._(83)^(212)Bi` are:
Last Answer : The number of `alpha` and `beta`-particles emitted in the nuclear reaction `._(90)^(210) Th to ._(83)^(212 ... `3 alpha, 7 beta` D. `4 alpha, 1 beta`
Description : This natural fiber obtained from the stems of a plant of the nettle family has found popularity in modern fibers with a high wet strength, absorbent but dries quickly, it can be spun or woven, has a high rot ... a source of heat or power? w) Plutonium-238 x) Strontium-90 y) Cesium-137 z) Uranium-235
Last Answer : ANSWER: W -- PLUTONIUM-238
Description : Uranium (`""_(92)U""^(238)`) decayed to `""_(82)Pb""^(206)`. The process is `""_(92)U""^(238)underset(xalpha,ybeta)to.""_(82)Pb""^(206)` `t""_(1//2)of
Last Answer : Uranium (`""_(92)U""^(238)`) decayed to `""_(82)Pb""^(206)`. The process is `""_(92)U""^(238)underset( ... series are A. 6,8 B. 8,6 C. 8,8 D. 6,6
Description : The number of neutrons accompanying the formation of `._(54)Xe^(139)` and `._(38)Sr^(94)` from the absorption of a slow neutron by `._(92)U^(235)`, fo
Last Answer : The number of neutrons accompanying the formation of `._(54)Xe^(139)` and `._(38)Sr^(94)` from the ... `._(92)U^(235)`, followed by nuclear fission is
Description : In the neutron`-`induced fissioin reaction of `._(92)U^(235)` one of the products if `._(37)Rb^(95),` in this mode, another nuclide and three neutrons
Last Answer : In the neutron`-`induced fissioin reaction of `._(92)U^(235)` one of the products if `._(37)Rb^(95),` in this ... `._(55)^(145)Co` D. `._(54)^(143)Xe`
Description : A stationary `._(82)^(200)Pb` nucleus emits an `alpha`-particle with kinetic energy `T_(alpha) = 5.77 MeV`. Find the recoil velocity of a daughter nuc
Last Answer : A stationary `._(82)^(200)Pb` nucleus emits an `alpha`-particle with kinetic energy `T_( ... accounted for by the recoil energy of daughter nucleus ?
Description : A radioactive element `X`, decays by the sequence and with half-lives, given below, `X underset(30"min")overset(alpha)(rarr) Y underset(2"days")overse
Last Answer : A radioactive element `X`, decays by the sequence and with half-lives, given below, `X underset(30"min" ... D. The mass number of Y is greater than X
Description : The decay constant for an `alpha-` decay of `Th^(232)` is `1.58xx10^(-10)s^(-1)`. How many `alpha-`decays occur from `1 g` sample in 365 days ?
Last Answer : The decay constant for an `alpha-` decay of `Th^(232)` is `1.58xx10^(-10)s^(-1)`. How many `alpha-` ... )` C. `2.219 xx 10^(19)` D. None of these
Description : Consider the following nuclear reactions: `""_(92)""^(238)Mto.""_(y)""^(x)N+2.""_(2)""^(4)He, ""_(x)""^(y)Nto ""_(B)""^(A)L+2beta""^(+)` The number of
Last Answer : Consider the following nuclear reactions: `""_(92)""^(238)Mto.""_(y)""^(x)N+2.""_(2)""^(4)He, ""_ ... in the element L is A. 142 B. 144 C. 140 D. 146
Description : In the disintegration of a radioactive element, `alpha`- and `beta`-particles are evolved from the nucleus. `._(0)n^(1) rarr ._(1)H^(1) + ._(-1)e^(0)
Last Answer : In the disintegration of a radioactive element, `alpha`- and `beta`-particles are evolved from the nucleus. `._(0 ... C. `2 alpha, 2 beta` D. `n beta`
Last Answer : In the disintegration of a radioactive element, `alpha`- and `beta`-particles are evolved from the ... C. decreases by 2 unit D. remains unaffected
Last Answer : In the disintegration of a radioactive element, `alpha`- and `beta`-particles are evolved from the nucleus. `._(0) ... in A. IIA B. IA C. IIB D. IVB
Last Answer : In the disintegration of a radioactive element, `alpha`- and `beta`-particles are evolved from the nucleus. ... , beta, beta` D. `beta, gamma, alpha`
Description : Nucleus of 92U235 contains __________ protons. (A) 92 (B) 235 (C) 143 (D) 325
Last Answer : (A) 92
Description : (A) Enrichement of `U^(235)` from a mixture containing more abundant `U^(238)` is based on diffusion of `UF_(6)`. `UF_(6) is a gaseous compound under
Last Answer : (A) Enrichement of `U^(235)` from a mixture containing more abundant `U^(238)` is based on diffusion of ` ... . D. If both (A) and (R ) are incorrect.
Description : The isotope of Uranium capable of sustaining chain reaction is - (1) U-235 (2) U-238 (3) U-239 (4) N.O.T.
Last Answer : (1) U-235 Explanation: Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table.
Description : Which is not a fissile nuclear material? (A) U-233 (B) U-235 (C) U-238 (D) Pu-239
Last Answer : (C) U-238
Description : Enrichment of uranium is done to increase the concentration of__________ in the natural uranium. (A) U-238 (B) U-233 (C) U-235 (D) Pu-239
Last Answer : (C) U-235
Description : Atoms of U-238 and U-235 differ in structure by three (A) Electrons and three protons (B) Protons (C) Neutrons (D) Electrons
Last Answer : (C) Neutrons
Description : The principle behind a breeder reactor is: w) U-235 undergoes fission. x) U-238 is converted to Pu-239, which undergoes fission. y) Deuterium undergoes fission. z) Cobalt-60 undergoes fission.
Last Answer : ANSWER: X -- U-238 IS CONVERTED TO Pu-239, WHICH UNDERGOES FISSION.
Description : Which of the following is the best nuclear fuel? (A) Np - 239 (B) U-234 (C) Pu -239 (D) Th-236
Last Answer : (C) Pu -239
Description : In the sequence of the following nuclear reaction, `X_(98)^(238) overset(-alpha)(to) Y overset(-beta)(to)L overset(nalpha)(to) ._(90)M^(218)` What is
Last Answer : In the sequence of the following nuclear reaction, `X_(98)^(238) overset(-alpha)(to) Y overset(-beta)(to)L overset( ... of n? A. 3 B. 4 C. 5 D. 6
Description : calculate the energy released in the nuclear fusion of isotopes of hydrogen (i) `._(1)^(2)H + ._(1)^(2)H rarr ._(2)^(3)He + ._(0)^(1)n` (ii) `._(1)^(2
Last Answer : calculate the energy released in the nuclear fusion of isotopes of hydrogen (i) `._(1)^(2)H + ._(1)^(2)H rarr . ... ",._(2)^(4)He = 4.00260,am u,):}`