Maharashtra State BoardHSC Science (General) 11th
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Balbharati solutions for Chemistry 11th Standard Maharashtra State Board chapter 13 - Nuclear Chemistry and Radioactivity [Latest edition]

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Chemistry 11th Standard Maharashtra State Board - Shaalaa.com

Chapter 13: Nuclear Chemistry and Radioactivity

Exercises
Exercises [Pages 202 - 203]

Balbharati solutions for Chemistry 11th Standard Maharashtra State Board Chapter 13 Nuclear Chemistry and Radioactivity Exercises [Pages 202 - 203]

Exercises | Q 1. (A) | Page 202

Choose the correct option.

Identify nuclear fusion reaction _____________

\[\ce{^1_1H + ^1_1H -> ^2_1H + ^0_1e}\]

\[\ce{^2_1H + ^1_1H -> ^3_2He}\]

\[\ce{^3_1H + ^1_1H -> ^3_1H + ^1_1p}\]

Exercises | Q 1. (B) | Page 202

Choose the correct option.

The missing particle from the nuclear reaction is ____________

\[\ce{^27_13Al + ^4_2He -> ? + ^1_0n}\]

  • \[\ce{^30_15P}\]

  • \[\ce{^32_16S}\]

  • \[\ce{^14_10Ne}\]

  • \[\ce{_14Si}\]

Exercises | Q 1. (C) | Page 202

Choose the correct option.

\[\ce{^60_27CO}\] decays with a half-life of 5.27 years to produce \[\ce{^60_28Ni}\]. What is the decay constant for such radioactive disintegration?

  • 0.132 y-1

  • 0.138

  • 29.6 y

  • 13.8%

Exercises | Q 1. (D) | Page 202

Choose the correct option.

The radioactive isotope used in the treatment of Leukemia is ______.

  • \[\ce{^60Co}\]

  • \[\ce{^226Ra}\]

  • \[\ce{^32P}\]

  • \[\ce{^226I}\]

Exercises | Q 1. (E) | Page 202

Choose the correct option.

The process by which nuclei having low masses are united to form nuclei with large masses is ______.

  • chemical reaction

  • nuclear fission

  • nuclear fusion

  • chain reaction

Exercises | Q 2. (A) | Page 202

On the basis of even-odd of protons and neutrons, what type of nuclides is most stable?

Exercises | Q 2. (B) | Page 202

Explain in brief, nuclear fission.

Exercises | Q 2. (C) | Page 202

The nuclides with odd number of both protons and neutrons are the least stable. Why?

Exercises | Q 2. (D) | Page 202

Referring the stability belt of stable nuclides, which nuclides are β and β+ emitters? Why?

Exercises | Q 2. (E) | Page 202

Explain with an example each nuclear transmutation and artificial radioactivity. What is the difference between them?

Exercises | Q 2. (F) | Page 202

What is the binding energy per nucleon?

Exercises | Q 2. (F) | Page 202

Explain with the help of a diagram how binding energy per nucleon affects nuclear stability?

Exercises | Q 2. (G) | Page 202

Explain with example α - decay.

Exercises | Q 2. (H) | Page 202

The energy produced in nuclear fusion is much larger than that produced in nuclear fission. Why is it difficult to use fusion to produce energy?

Exercises | Q 2. (I) | Page 202

How does N/Z ratio affect nuclear stability? Explain with a suitable diagram.

Exercises | Q 2. (J) | Page 202

You are given a very old sample of wood. How will you determine its age?

Exercises | Q 3. (A) | Page 202

Give an example of mirror nuclei.

Exercises | Q 3. (B) | Page 202

Balance the nuclear reaction:

\[\ce{^118_54Xe -> ? + I^118_54}\]

Exercises | Q 3. (C) | Page 202

Name the most stable nuclide known.

Exercises | Q 3. (C) | Page 202

Write two factors responsible for its stability.

Exercises | Q 3. (D) | Page 202

Write relation between decay constant of a radioelement and its half-life.

Exercises | Q 3. (E) | Page 202

What is the difference between an α-particle and helium atom?

Exercises | Q 3. (F) | Page 202

Write one point that differentiates nuclear reactions from chemical reactions.

Exercises | Q 3. (G) | Page 202

Write pairs of isotones and one pair of mirror nuclei from the following:

\[\ce{^10_5B, ^12_6C, ^27_13Al, ^11_6C, ^28_14S}\]

Exercises | Q 3. (H) | Page 202

Derive the relationship between half-life and decay constant of a radioelement.

Exercises | Q 3. (I) | Page 202

Represent graphically log10 (activity/dps) versus t/s. What is its slope?

Exercises | Q 3. (J) | Page 202

Write two units of radioactivity. How are they interrelated?

Exercises | Q 3. (K) | Page 202

The half-life of 24Na is 900 minutes. What is its decay constant?

Exercises | Q 3. (L) | Page 202

Decay constant of 197Hg is 0.017 h-1. What is its half-life?

Exercises | Q 3. (M) | Page 202

The total binding energy of 58Ni is 508 MeV. What is its binding energy per nucleon?

Exercises | Q 3. (N) | Page 202

The atomic mass of \[\ce{^32_16S}\] is 31.97 u. If masses of neutron and H atom are 1.0087 u and 1.0078 u respectively. What is the mass defect?

Exercises | Q 3. (O) | Page 203

Write the fusion reactions occurring in the Sun and stars.

Exercises | Q 3. (P) | Page 203

How many α and β-particles are emitted in the transmutation \[\ce{^232_90Th -> ^208_82Pb}\]?

Exercises | Q 3. (Q) | Page 203

A produces B by α-emission. If B is in group 16 of the periodic table, what is the group of A?

Exercises | Q 3. (R) | Page 203

Find the number of α and β-particles emitted in the process \[\ce{^222_86Rn -> ^214_84Po}\].

Exercises | Q 4. (A) | Page 203

The half-life of 18F is 110 minutes. What fraction of 18F sample decays in 20 minutes?

Exercises | Q 4. (B) | Page 203

The half-life of 35S is 87.8 d. What percentage of 35S sample remains after 180 d?

Exercises | Q 4. (C) | Page 203

The half-life of 67Ga is 78 h. How long will it take to decay 12% of the sample of Ga?

Exercises | Q 4. (D) | Page 203

0.5 g sample of 201Tl decays to 0.0788 g in 8 days. What is its half-life?

Exercises | Q 4. (E) | Page 203

65% of 111In sample decays in 4.2 d. What is its half-life?

Exercises | Q 4. (F) | Page 203

Calculate the binding energy per nucleon of \[\ce{^84_36Kr}\] whose atomic mass is 83.913 u. (Mass of neutron is 1.0087 u and that of H atom is 1.0078 u).

Exercises | Q 4. (G) | Page 203

Calculate the energy in MeV released in the nuclear reaction \[\ce{^174_77Ir -> ^170_75Re + ^4_2He}\]

Atomic mass: Ir = 173.97 u, Re = 169.96 u and He 4.0026 u

Exercises | Q 4. (H) | Page 203

A 3/4 of the original amount of radioisotope decays in 60 minutes. What is its half-life?

Exercises | Q 4. (I) | Page 203

How many particles are emitted by 0.1 g of 226Ra in one year?

Exercises | Q 4. (J) | Page 203

A sample of 32P initially shows activity of one Curie. After 303 days, the activity falls to 1.5 × 104 dps. What is the half-life of 32P?

Exercises | Q 4. (K) | Page 203

The half-life of radon is 3.82 d. By what time would 99.9% of radon will be decayed?

Exercises | Q 4. (L) | Page 203

It has been found that the Sun’s mass loss is 4.34 × 109 kg per second. How much energy per second would be radiated into space by the Sun?

Exercises | Q 4. (M) | Page 203

A sample of old wood shows 7.0 dps/g. If the fresh sample of tree shows 16.0 dps/g, how old is the given sample of wood? (Half-life of 14C is 5730 y)

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Chapter 13: Nuclear Chemistry and Radioactivity

Exercises
Chemistry 11th Standard Maharashtra State Board - Shaalaa.com

Balbharati solutions for Chemistry 11th Standard Maharashtra State Board chapter 13 - Nuclear Chemistry and Radioactivity

Balbharati solutions for Chemistry 11th Standard Maharashtra State Board chapter 13 (Nuclear Chemistry and Radioactivity) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board Chemistry 11th Standard Maharashtra State Board solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Chemistry 11th Standard Maharashtra State Board chapter 13 Nuclear Chemistry and Radioactivity are Introduction: Nuclear Chemistry is a Branch of Physical Chemistry, Classification of Nuclides, Nuclear Stability, Radioactivity, Radioactive Decays, Modes of Decay, Nuclear Reactions, Applications of Radio Isotopes.

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