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(A): Zinc does not show characteristic p...

(A): Zinc does not show characteristic properties of transition metals
(R): The outer most shell of zinc is completely filled 

A

Both A & R are true, R is the correct explanation of A

B

Both A & R are true, R is not correct explanation of A

C

A is true, R is false

D

A is false, R is true

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the assertion and reason provided in the question, we will follow these steps: ### Step 1: Understand the Assertion The assertion states that "Zinc does not show characteristic properties of transition metals." ### Step 2: Define Transition Metals Transition metals are defined as elements that have an incomplete d-subshell in either their elemental state or one of their oxidation states. They typically exhibit variable oxidation states, form colored compounds, and have catalytic properties. ### Step 3: Examine Zinc's Electron Configuration Zinc has an atomic number of 30. Its electron configuration is: - 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² ### Step 4: Analyze the d-Shell of Zinc In the case of zinc, the 3d subshell is completely filled (3d¹⁰), and the outermost shell (4s) is also filled (4s²). This means that zinc does not have any unpaired electrons in its d-subshell. ### Step 5: Conclusion on the Assertion Since zinc has a completely filled d-subshell, it does not exhibit the typical properties associated with transition metals, such as variable oxidation states or the ability to form colored compounds. Therefore, the assertion is true. ### Step 6: Understand the Reason The reason states that "The outermost shell of zinc is completely filled." ### Step 7: Evaluate the Reason The outermost shell of zinc (4s) is indeed completely filled, which contributes to zinc's lack of characteristic transition metal properties. Thus, the reason is also true. ### Step 8: Determine the Relationship Between Assertion and Reason Since both the assertion and the reason are true, and the reason correctly explains why zinc does not show the characteristic properties of transition metals, we conclude that both statements are correct and that the reason is the correct explanation of the assertion. ### Final Answer Both A and R are true, and R is the correct explanation of A. ---
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