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Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct
Q.
Which of the following is/are correct regarding noble gases?
- a)The commercial source of helium is natural gas
- b)In 4th period, the elements with lowest and highest ionisation energies are K and Kr
- c)Xenon is isoelectronic with La3+
- d)Radium when emits beta-particle, radon and helium are forme.
Correct answer is option 'A,B,C'. Can you explain this answer?
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Direction (Q. Nos. 11-15) This section contains 5 multiple choice ques...
Radon formed on α-decay of radium.
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Direction (Q. Nos. 11-15) This section contains 5 multiple choice ques...
Answer:
Sources of Helium:
a) The commercial source of helium is natural gas.
Ionisation Energies in 4th Period:
b) In the 4th period, the elements with the lowest and highest ionisation energies are K and Kr.
Xenon is Isoelectronic with La3+:
c) Xenon is isoelectronic with La3+.
Radium Emission of Beta Particles:
d) When radium emits a beta-particle, radon and helium are formed.
Explanation:
a) Sources of Helium:
Helium is mainly found in natural gas deposits. It is extracted from natural gas using a process called fractional distillation. Natural gas contains a small percentage of helium, which is separated and purified for commercial use. Therefore, the commercial source of helium is natural gas.
b) Ionisation Energies in 4th Period:
The 4th period of the periodic table consists of elements from potassium (K) to krypton (Kr). Ionisation energy is the energy required to remove an electron from an atom or ion in the gaseous state. Among the elements in the 4th period, potassium (K) has the lowest ionisation energy because it has the largest atomic radius and the least effective nuclear charge. On the other hand, krypton (Kr) has the highest ionisation energy because it has the smallest atomic radius and the highest effective nuclear charge. Therefore, the statement that the elements with the lowest and highest ionisation energies in the 4th period are K and Kr is correct.
c) Xenon is Isoelectronic with La3+:
Isoelectronic species have the same number of electrons. Xenon (Xe) has the electron configuration 1s22s22p63s23p63d104s24p64d105s25p6. La3+ is a cation of lanthanum, which has the electron configuration 1s22s22p63s23p63d104s24p64d105s25p65d0. Therefore, xenon and La3+ have the same number of electrons and are isoelectronic. Hence, the statement that xenon is isoelectronic with La3+ is correct.
d) Radium Emission of Beta Particles:
When radium (Ra) undergoes radioactive decay,
Sources of Helium:
a) The commercial source of helium is natural gas.
Ionisation Energies in 4th Period:
b) In the 4th period, the elements with the lowest and highest ionisation energies are K and Kr.
Xenon is Isoelectronic with La3+:
c) Xenon is isoelectronic with La3+.
Radium Emission of Beta Particles:
d) When radium emits a beta-particle, radon and helium are formed.
Explanation:
a) Sources of Helium:
Helium is mainly found in natural gas deposits. It is extracted from natural gas using a process called fractional distillation. Natural gas contains a small percentage of helium, which is separated and purified for commercial use. Therefore, the commercial source of helium is natural gas.
b) Ionisation Energies in 4th Period:
The 4th period of the periodic table consists of elements from potassium (K) to krypton (Kr). Ionisation energy is the energy required to remove an electron from an atom or ion in the gaseous state. Among the elements in the 4th period, potassium (K) has the lowest ionisation energy because it has the largest atomic radius and the least effective nuclear charge. On the other hand, krypton (Kr) has the highest ionisation energy because it has the smallest atomic radius and the highest effective nuclear charge. Therefore, the statement that the elements with the lowest and highest ionisation energies in the 4th period are K and Kr is correct.
c) Xenon is Isoelectronic with La3+:
Isoelectronic species have the same number of electrons. Xenon (Xe) has the electron configuration 1s22s22p63s23p63d104s24p64d105s25p6. La3+ is a cation of lanthanum, which has the electron configuration 1s22s22p63s23p63d104s24p64d105s25p65d0. Therefore, xenon and La3+ have the same number of electrons and are isoelectronic. Hence, the statement that xenon is isoelectronic with La3+ is correct.
d) Radium Emission of Beta Particles:
When radium (Ra) undergoes radioactive decay,
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Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correctQ.Which of the following is/are correct regarding noble gases?a)The commercial source of helium is natural gasb)In 4th period, the elements with lowest and highest ionisation energies are K and Krc)Xenon is isoelectronic with La3+d)Radium when emits beta-particle, radon and helium are forme.Correct answer is option 'A,B,C'. Can you explain this answer?
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Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correctQ.Which of the following is/are correct regarding noble gases?a)The commercial source of helium is natural gasb)In 4th period, the elements with lowest and highest ionisation energies are K and Krc)Xenon is isoelectronic with La3+d)Radium when emits beta-particle, radon and helium are forme.Correct answer is option 'A,B,C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correctQ.Which of the following is/are correct regarding noble gases?a)The commercial source of helium is natural gasb)In 4th period, the elements with lowest and highest ionisation energies are K and Krc)Xenon is isoelectronic with La3+d)Radium when emits beta-particle, radon and helium are forme.Correct answer is option 'A,B,C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correctQ.Which of the following is/are correct regarding noble gases?a)The commercial source of helium is natural gasb)In 4th period, the elements with lowest and highest ionisation energies are K and Krc)Xenon is isoelectronic with La3+d)Radium when emits beta-particle, radon and helium are forme.Correct answer is option 'A,B,C'. Can you explain this answer?.
Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correctQ.Which of the following is/are correct regarding noble gases?a)The commercial source of helium is natural gasb)In 4th period, the elements with lowest and highest ionisation energies are K and Krc)Xenon is isoelectronic with La3+d)Radium when emits beta-particle, radon and helium are forme.Correct answer is option 'A,B,C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correctQ.Which of the following is/are correct regarding noble gases?a)The commercial source of helium is natural gasb)In 4th period, the elements with lowest and highest ionisation energies are K and Krc)Xenon is isoelectronic with La3+d)Radium when emits beta-particle, radon and helium are forme.Correct answer is option 'A,B,C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correctQ.Which of the following is/are correct regarding noble gases?a)The commercial source of helium is natural gasb)In 4th period, the elements with lowest and highest ionisation energies are K and Krc)Xenon is isoelectronic with La3+d)Radium when emits beta-particle, radon and helium are forme.Correct answer is option 'A,B,C'. Can you explain this answer?.
Solutions for Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correctQ.Which of the following is/are correct regarding noble gases?a)The commercial source of helium is natural gasb)In 4th period, the elements with lowest and highest ionisation energies are K and Krc)Xenon is isoelectronic with La3+d)Radium when emits beta-particle, radon and helium are forme.Correct answer is option 'A,B,C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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