Class 12 Exam  >  Class 12 Questions  >   Read the passage given below and answer the ... Start Learning for Free
Read the passage given below and answer the following questions:
In transition elements, generally, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number. This is because the new electron enters a d orbital each time the nuclear charge increases by unity. But the radii of the third (5d) series are virtually the same as those of the corresponding members of the second series. This phenomenon is associated with the intervention of the 4f orbitals which must be filled before the 5d series of elements begin. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction. In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Following are the transition metal ions of 3d series: Ti4+, V2+, Mn3+, Cr3+ (Atomic number: Ti = 22, V = 23, Mn = 25, Cr = 24)
Assertion (A): Among the given ions, Cr3+ is the most stable in an aqueous environment.
Reason (R): Cr3+ has half filled t32g.
  • a)
    Assertion and reason both are correct statements and reason is correct explanation for assertion.
  • b)
    Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  • c)
    Assertion is correct statement but reason is wrong statement.
  • d)
    Assertion is wrong statement but reason is correct statement.
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Read the passage given below and answer the following questions:In tr...
Cr3+, half filled t32g.
View all questions of this test
Most Upvoted Answer
Read the passage given below and answer the following questions:In tr...
Explanation:

Assertion: Among the given ions, Cr3+ is the most stable in an aqueous environment.

Reason: Cr3+ has half filled t32g.
- The statement in the assertion is incorrect. Among the given transition metal ions (Ti4+, V2+, Mn3+, Cr3+), Cr3+ is not the most stable in an aqueous environment.
- The reason provided is also incorrect. The stability of a transition metal ion in an aqueous environment is determined by factors such as ligand strength, crystal field stabilization energy, and the nature of the complex formed.
Therefore, the correct answer is option 'D' - Assertion is a wrong statement but the reason is a correct statement.
Explore Courses for Class 12 exam

Similar Class 12 Doubts

Directions:Read the below case and answer the questions that follow:The evidence for hereditary influences on intelligence comes mainly from studies on twins and adopted children. The intelligence of identical twins reared together correlate almost 0.90. Twins separated early in childhood also show considerable similarity in their intellectual, personality and behavioural characteristics. The intelligence of identical twins reared in different environments correlate 0.72, those of fraternal twins reared together correlate almost 0.60, and those of brothers and sisters reared together correlate about 0.50, while siblings reared apart correlate about 0.25. Another line of evidence comes from the studies of adopted children, which shows that children’s intelligence is more similar to their biological rather than adoptive parents. With respect to the role of environment, studies have reported that as children grow in age, their intelligence level tends to move closer to that of their adoptive parents. Children from disadvantaged homes adopted into families with higher socioeconomic status exhibit a large increase in their intelligence scores. There is evidence that environmental deprivation lowers intelligence while rich nutrition, good family background, and quality schooling increases intelligence. There is a general consensus among psychologists that intelligence is a product of complex interaction of heredity (natur e) and environment (nurture). Heredity can best be viewed as something that sets a range within which an individual’s developmentis actually shaped by the support and opportunities of the environment.Q. What type of children are studied for this analysis?

Directions:Read the below case and answer the questions that follow:The evidence for hereditary influences on intelligence comes mainly from studies on twins and adopted children. The intelligence of identical twins reared together correlate almost 0.90. Twins separated early in childhood also show considerable similarity in their intellectual, personality and behavioural characteristics. The intelligence of identical twins reared in different environments correlate 0.72, those of fraternal twins reared together correlate almost 0.60, and those of brothers and sisters reared together correlate about 0.50, while siblings reared apart correlate about 0.25. Another line of evidence comes from the studies of adopted children, which shows that children’s intelligence is more similar to their biological rather than adoptive parents. With respect to the role of environment, studies have reported that as children grow in age, their intelligence level tends to move closer to that of their adoptive parents. Children from disadvantaged homes adopted into families with higher socioeconomic status exhibit a large increase in their intelligence scores. There is evidence that environmental deprivation lowers intelligence while rich nutrition, good family background, and quality schooling increases intelligence. There is a general consensus among psychologists that intelligence is a product of complex interaction of heredity (natur e) and environment (nurture). Heredity can best be viewed as something that sets a range within which an individual’s developmentis actually shaped by the support and opportunities of the environment.Q. Children’s intelligence is more closely related to their _____________ parents.

Read the passage given below and answer the following questions:In transition elements, generally, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number. This is because the new electron enters a d orbital each time the nuclear charge increases by unity. But the radii of the third (5d) series are virtually the same as those of the corresponding members of the second series. This phenomenon is associated with the intervention of the 4f orbitals which must be filled before the 5d series of elements begin. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction. In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Following are the transition metal ions of 3d series: Ti4+, V2+, Mn3+, Cr3+ (Atomic number: Ti = 22, V = 23, Mn = 25, Cr = 24)Assertion (A): Among the given ions, Cr3+ is the most stable in an aqueous environment.Reason (R): Cr3+ has half filled t32g.a)Assertion and reason both are correct statements and reason is correct explanation for assertion.b)Assertion and reason both are correct statements but reason is not correct explanation for assertion.c)Assertion is correct statement but reason is wrong statement.d)Assertion is wrong statement but reason is correct statement.Correct answer is option 'D'. Can you explain this answer?
Question Description
Read the passage given below and answer the following questions:In transition elements, generally, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number. This is because the new electron enters a d orbital each time the nuclear charge increases by unity. But the radii of the third (5d) series are virtually the same as those of the corresponding members of the second series. This phenomenon is associated with the intervention of the 4f orbitals which must be filled before the 5d series of elements begin. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction. In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Following are the transition metal ions of 3d series: Ti4+, V2+, Mn3+, Cr3+ (Atomic number: Ti = 22, V = 23, Mn = 25, Cr = 24)Assertion (A): Among the given ions, Cr3+ is the most stable in an aqueous environment.Reason (R): Cr3+ has half filled t32g.a)Assertion and reason both are correct statements and reason is correct explanation for assertion.b)Assertion and reason both are correct statements but reason is not correct explanation for assertion.c)Assertion is correct statement but reason is wrong statement.d)Assertion is wrong statement but reason is correct statement.Correct answer is option 'D'. 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 Read the passage given below and answer the following questions:In transition elements, generally, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number. This is because the new electron enters a d orbital each time the nuclear charge increases by unity. But the radii of the third (5d) series are virtually the same as those of the corresponding members of the second series. This phenomenon is associated with the intervention of the 4f orbitals which must be filled before the 5d series of elements begin. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction. In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Following are the transition metal ions of 3d series: Ti4+, V2+, Mn3+, Cr3+ (Atomic number: Ti = 22, V = 23, Mn = 25, Cr = 24)Assertion (A): Among the given ions, Cr3+ is the most stable in an aqueous environment.Reason (R): Cr3+ has half filled t32g.a)Assertion and reason both are correct statements and reason is correct explanation for assertion.b)Assertion and reason both are correct statements but reason is not correct explanation for assertion.c)Assertion is correct statement but reason is wrong statement.d)Assertion is wrong statement but reason is correct statement.Correct answer is option 'D'. 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 Read the passage given below and answer the following questions:In transition elements, generally, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number. This is because the new electron enters a d orbital each time the nuclear charge increases by unity. But the radii of the third (5d) series are virtually the same as those of the corresponding members of the second series. This phenomenon is associated with the intervention of the 4f orbitals which must be filled before the 5d series of elements begin. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction. In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Following are the transition metal ions of 3d series: Ti4+, V2+, Mn3+, Cr3+ (Atomic number: Ti = 22, V = 23, Mn = 25, Cr = 24)Assertion (A): Among the given ions, Cr3+ is the most stable in an aqueous environment.Reason (R): Cr3+ has half filled t32g.a)Assertion and reason both are correct statements and reason is correct explanation for assertion.b)Assertion and reason both are correct statements but reason is not correct explanation for assertion.c)Assertion is correct statement but reason is wrong statement.d)Assertion is wrong statement but reason is correct statement.Correct answer is option 'D'. Can you explain this answer?.
Solutions for Read the passage given below and answer the following questions:In transition elements, generally, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number. This is because the new electron enters a d orbital each time the nuclear charge increases by unity. But the radii of the third (5d) series are virtually the same as those of the corresponding members of the second series. This phenomenon is associated with the intervention of the 4f orbitals which must be filled before the 5d series of elements begin. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction. In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Following are the transition metal ions of 3d series: Ti4+, V2+, Mn3+, Cr3+ (Atomic number: Ti = 22, V = 23, Mn = 25, Cr = 24)Assertion (A): Among the given ions, Cr3+ is the most stable in an aqueous environment.Reason (R): Cr3+ has half filled t32g.a)Assertion and reason both are correct statements and reason is correct explanation for assertion.b)Assertion and reason both are correct statements but reason is not correct explanation for assertion.c)Assertion is correct statement but reason is wrong statement.d)Assertion is wrong statement but reason is correct statement.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of Read the passage given below and answer the following questions:In transition elements, generally, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number. This is because the new electron enters a d orbital each time the nuclear charge increases by unity. But the radii of the third (5d) series are virtually the same as those of the corresponding members of the second series. This phenomenon is associated with the intervention of the 4f orbitals which must be filled before the 5d series of elements begin. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction. In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Following are the transition metal ions of 3d series: Ti4+, V2+, Mn3+, Cr3+ (Atomic number: Ti = 22, V = 23, Mn = 25, Cr = 24)Assertion (A): Among the given ions, Cr3+ is the most stable in an aqueous environment.Reason (R): Cr3+ has half filled t32g.a)Assertion and reason both are correct statements and reason is correct explanation for assertion.b)Assertion and reason both are correct statements but reason is not correct explanation for assertion.c)Assertion is correct statement but reason is wrong statement.d)Assertion is wrong statement but reason is correct statement.Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Read the passage given below and answer the following questions:In transition elements, generally, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number. This is because the new electron enters a d orbital each time the nuclear charge increases by unity. But the radii of the third (5d) series are virtually the same as those of the corresponding members of the second series. This phenomenon is associated with the intervention of the 4f orbitals which must be filled before the 5d series of elements begin. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction. In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Following are the transition metal ions of 3d series: Ti4+, V2+, Mn3+, Cr3+ (Atomic number: Ti = 22, V = 23, Mn = 25, Cr = 24)Assertion (A): Among the given ions, Cr3+ is the most stable in an aqueous environment.Reason (R): Cr3+ has half filled t32g.a)Assertion and reason both are correct statements and reason is correct explanation for assertion.b)Assertion and reason both are correct statements but reason is not correct explanation for assertion.c)Assertion is correct statement but reason is wrong statement.d)Assertion is wrong statement but reason is correct statement.Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Read the passage given below and answer the following questions:In transition elements, generally, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number. This is because the new electron enters a d orbital each time the nuclear charge increases by unity. But the radii of the third (5d) series are virtually the same as those of the corresponding members of the second series. This phenomenon is associated with the intervention of the 4f orbitals which must be filled before the 5d series of elements begin. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction. In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Following are the transition metal ions of 3d series: Ti4+, V2+, Mn3+, Cr3+ (Atomic number: Ti = 22, V = 23, Mn = 25, Cr = 24)Assertion (A): Among the given ions, Cr3+ is the most stable in an aqueous environment.Reason (R): Cr3+ has half filled t32g.a)Assertion and reason both are correct statements and reason is correct explanation for assertion.b)Assertion and reason both are correct statements but reason is not correct explanation for assertion.c)Assertion is correct statement but reason is wrong statement.d)Assertion is wrong statement but reason is correct statement.Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Read the passage given below and answer the following questions:In transition elements, generally, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number. This is because the new electron enters a d orbital each time the nuclear charge increases by unity. But the radii of the third (5d) series are virtually the same as those of the corresponding members of the second series. This phenomenon is associated with the intervention of the 4f orbitals which must be filled before the 5d series of elements begin. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction. In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Following are the transition metal ions of 3d series: Ti4+, V2+, Mn3+, Cr3+ (Atomic number: Ti = 22, V = 23, Mn = 25, Cr = 24)Assertion (A): Among the given ions, Cr3+ is the most stable in an aqueous environment.Reason (R): Cr3+ has half filled t32g.a)Assertion and reason both are correct statements and reason is correct explanation for assertion.b)Assertion and reason both are correct statements but reason is not correct explanation for assertion.c)Assertion is correct statement but reason is wrong statement.d)Assertion is wrong statement but reason is correct statement.Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Read the passage given below and answer the following questions:In transition elements, generally, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number. This is because the new electron enters a d orbital each time the nuclear charge increases by unity. But the radii of the third (5d) series are virtually the same as those of the corresponding members of the second series. This phenomenon is associated with the intervention of the 4f orbitals which must be filled before the 5d series of elements begin. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction. In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.Following are the transition metal ions of 3d series: Ti4+, V2+, Mn3+, Cr3+ (Atomic number: Ti = 22, V = 23, Mn = 25, Cr = 24)Assertion (A): Among the given ions, Cr3+ is the most stable in an aqueous environment.Reason (R): Cr3+ has half filled t32g.a)Assertion and reason both are correct statements and reason is correct explanation for assertion.b)Assertion and reason both are correct statements but reason is not correct explanation for assertion.c)Assertion is correct statement but reason is wrong statement.d)Assertion is wrong statement but reason is correct statement.Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 12 tests.
Explore Courses for Class 12 exam
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev