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In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.
Assertion (A): Helium is placed in group 18 along with p-block elements.
Reason (R): It shows properties similar to p-block elements.
- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)Both A and R are false.
Correct answer is option 'C'. Can you explain this answer?
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In the following question a statement of Assertion (A) followed by a ...
He (1s2) should be placed along with s-block elements because of its electronic configuration but it has a completely filled valence shell and as a result it exhibits properties of noble gases, thus it is placed along with noble gases (ns2, np6).
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In the following question a statement of Assertion (A) followed by a ...
Assertion and Reasoning Question
Assertion (A): Helium is placed in group 18 along with p-block elements.
Reason (R): It shows properties similar to p-block elements.
Explanation:
• Group 18 elements are known as noble gases which are inert in nature because of their stable electronic configuration. Their electronic configuration is ns2 np6. All the noble gases have completely filled outermost s and p orbitals.
• Helium is the first element of group 18, and its electronic configuration is 1s2. It has only two electrons in its outermost shell which is similar to other noble gases.
• Helium is very stable and almost inert, similar to other noble gases. It does not react with other elements easily due to its stable electronic configuration.
• The properties of Helium are similar to p-block elements as they also have completely filled outermost p orbitals. The p-block elements are located on the right side of the periodic table.
• Therefore, the Assertion is true because Helium is placed in group 18 along with p-block elements due to its similar properties.
Reason (R) is false because:
• Helium does not show properties similar to p-block elements because it is not a p-block element. It is a s-block element as its outermost electrons are present in the s-orbital.
• The properties of Helium are similar to noble gases, which are also present in group 18.
• Hence, Reason (R) is false.
Therefore, the correct answer is option (c) A is true but R is false.
Assertion (A): Helium is placed in group 18 along with p-block elements.
Reason (R): It shows properties similar to p-block elements.
Explanation:
• Group 18 elements are known as noble gases which are inert in nature because of their stable electronic configuration. Their electronic configuration is ns2 np6. All the noble gases have completely filled outermost s and p orbitals.
• Helium is the first element of group 18, and its electronic configuration is 1s2. It has only two electrons in its outermost shell which is similar to other noble gases.
• Helium is very stable and almost inert, similar to other noble gases. It does not react with other elements easily due to its stable electronic configuration.
• The properties of Helium are similar to p-block elements as they also have completely filled outermost p orbitals. The p-block elements are located on the right side of the periodic table.
• Therefore, the Assertion is true because Helium is placed in group 18 along with p-block elements due to its similar properties.
Reason (R) is false because:
• Helium does not show properties similar to p-block elements because it is not a p-block element. It is a s-block element as its outermost electrons are present in the s-orbital.
• The properties of Helium are similar to noble gases, which are also present in group 18.
• Hence, Reason (R) is false.
Therefore, the correct answer is option (c) A is true but R is false.
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In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Helium is placed in group 18 along with p-block elements.Reason (R): It shows properties similar to p-block elements.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer?
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In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Helium is placed in group 18 along with p-block elements.Reason (R): It shows properties similar to p-block elements.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Helium is placed in group 18 along with p-block elements.Reason (R): It shows properties similar to p-block elements.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Helium is placed in group 18 along with p-block elements.Reason (R): It shows properties similar to p-block elements.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer?.
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