JEE Questions for Chemistry Nuclear Chemistry Quiz 3 - MCQExams.com

7 N 14 when attacked by double charged helium ion, it emits a proton and
  • 8 O 16
  • 7 N 15
  • 8 O 17
  • 9 F 18
The only, most stable nucleus formed by bombarding either 13Al27 by neutrons or 11Na23 by deuterons, is
  • 15P30
  • 14Si30
  • 12Mg24
  • 56Ba137
Cadmium rods are used for which purpose
  • emit electrons
  • absorb neutrons
  • emit neutrons
  • absorb electrons
The radiant energy from the sun is due to
  • combustion
  • nuclear fusion
  • nuclear fission
  • chemical reaction
Water used as moderator in nuclear reactor is called
  • heavy water
  • hard water
  • nuclear water
  • critical water
Hydrogen bomb is based on the principle of
  • artificial radioactivity
  • nuclear fusion
  • natural radioactivity
  • nuclear fission
Which of the following cannot be accelerated?
  • α -particle
  • β -particle
  • Protons
  • Neutrons
Which one of the following radioactive isotope is used in the treatment of cancer ?
  • P32
  • I131
  • Co60
  • Na24
Which of the following is used in the treatment of blood cancer ?
  • I131
  • P32
  • Rn
  • I127
Radiocarbon dating was discovered by
  • GN Lewis
  • J Williard Gibbs
  • WF Libby
  • W Nernst
The mass of helium atom of mass number 4 is 4.0026 u, while that of the neutron and proton are 1.0087 and 1.0078 respectively on the same scale. Hence, the nuclear binding energy per nucleon in the helium atom is nearly
  • 5 MeV
  • 7 MeV
  • 10 MeV
  • 14 MeV
The nucleus of an atom can be assumed to be spherical. The radius of the nucleus of mass number A is given by 1.25 × 10-13 × A 1/3 cm. Radius of atom is one Å. If the mass number is 64, then the fraction of the atomic volume that is occupied by the nucleus is
  • 1.0 × 10-3
  • 5.0 × 10-5
  • 2.5 × 10-2
  • 1.25 × 10-13
The value of amu is which of the following?
  • 1.57 × 10-24 kg
  • 1.66 × 10-24 kg
  • 1.99 × 10-23 kg
  • 1.66 × 10-27 kg
7N14 can be converted into 8O17 and proton by combination with which one of the following?
  • α - particle
  • Neutron
  • Proton
  • Deuterium

Chemistry-Nuclear Chemistry-5517.png
  • 146/92
  • 144/92
  • 146/90
  • 144/90
The relative penetrating power of α, β, γ and neutron(n) follows the order
  • α > β > γ > n
  • n > γ > β > α
  • β > α > n > γ
  • None of these

Chemistry-Nuclear Chemistry-5520.png
  • β- emission
  • α - emission
  • β+ emission
  • K - electron capture
The number of α and β-particles emitted in nuclear reaction
90 Th 228 → 83 Bi 212 are respectively,
  • 4, 1
  • 3, 7
  • 8, 1
  • 4, 7
Which among the following are correct with respect to the unit of radioactivity?
I. The SI unit of radioactivity is curie (Ci)
II. 1 Ci = 3.7 × 1010 disintegrations s-1
III. 1 Bq = 3.7 × 1010 Ci
IV. The SI unit of radioactivety is Becquerel (Bq)
V. 1 Ci = 3.7 × 1010 Bq
  • I and III
  • IV and V
  • I and II
  • II and IV
The number of α and β- particles emitted in the nuclear reaction
90 Th 228 → 83 Bi 212 are
  • 4α and 1β
  • 3α and 7β
  • 8α and 1β
  • 4α and 7β

Chemistry-Nuclear Chemistry-5525.png
  • 92 and 234
  • 94 and 230
  • 90 and 230
  • 92 and 230

Chemistry-Nuclear Chemistry-5527.png
  • Two β-
  • Two β- and one β+
  • one β- and one γ
  • one β+ and one β-

Chemistry-Nuclear Chemistry-5529.png
  • 9
  • 14
  • 5
  • 7
A sample of radioactive substance with half-life of 3 days was found to contain only 3g of it, when received exactly 12 days after sealing. The amount of the radioactive substance when it was sealed, was
  • 6 g
  • 12 g
  • 24 g
  • 36 g
  • 48 g
The half-life period of uranium is 4.5 billion years. After 9.0 billion years, the number of moles of helium liberated from the following nuclear reaction will be
92 U 238 → 90 Th 234 + 2 He 4
  • 0.75 mol
  • 1.0 mol
  • 1.5 mol
  • 0.50 mol
Lead is the final product formed by a series of changes in which the rate determining state is the radioactive decay of uranium-238 with a half-life of 4.5 × 109 yr. What would be the age of a rock sample originally lead free in which the molar proportion of uranium to lead is now 1 : 3 ?
  • 1.5 × 109 yr
  • 2.25 × 109 yr
  • 4.5 × 108 yr
  • 9.0 × 109 yr
  • 13 × 109 yr
When a radioactive substance is kept in vacuum, the rate of its disintegration per second
  • increase considerably
  • is not affected
  • suffers a slight decrease
  • increases only if the products are gaseous
If the disintegration constant of isotope is 1.237 × 10-4 yr-1 , then half-life period will be
  • 280 yr
  • 560 yr
  • 5600 yr
  • 2800 yr
Two radioactive elements X and Y have half-lives of 6 min and 15 min respectively. An experiment starts with 8 times as many atoms of X as Y . How long it takes for the number of atoms of X left equals the number of atoms of Y left ?
  • 6 min
  • 12 min
  • 48 min
  • 30 min
  • 24 min

Chemistry-Nuclear Chemistry-5535.png
  • 1
  • 2
  • 3
  • 4
0:0:1


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