Read the following statement and explanation and answer as per the opt...
The correct option (a) Statement I is true; Statement II is true; Statement II is a correct explanation of Statement I.
Explanation:
Both are correct and statement II is the correct explanation of statement I.
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Read the following statement and explanation and answer as per the opt...
Understanding the Statement and Explanation
The statement and explanation pertain to the behavior of alkali metals and their hydrides. Here's a breakdown:
Statement Analysis
- Alkali Metals and Ionic Hydrides:
- Alkali metals (Li, Na, K, Rb, Cs) can indeed form ionic hydrides.
- These hydrides contain the hydride ion (H–), which has a negative charge and is formed when hydrogen gains an electron.
Explanation Analysis
- Electronegativity of Alkali Metals:
- Alkali metals have low electronegativity, which means they readily lose electrons to form positive ions.
- This property allows them to bond with the hydride ion (H–), creating stable ionic hydrides.
- Electrical Conductivity:
- The hydrides of alkali metals can conduct electricity when fused.
- This conductivity is due to the movement of ions, which facilitates the flow of electric current.
- When these hydrides are subjected to electrolysis, they liberate hydrogen gas at the anode.
Conclusion
- The statement is true because alkali metals do form ionic hydrides containing the hydride ion.
- The explanation is also true as it accurately describes the properties of alkali metal hydrides, including their conductivity and the liberation of hydrogen during electrolysis.
- Therefore, the explanation correctly clarifies the statement.
Correct Answer
- The answer is option 'A': Both S and E are true, and E is the correct explanation of S.
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