Question:
Identify the correct statements from the following
I.
All alkaline earth metals give hydrides on heating with hydrogen.
II.
Calcium hydroxide is used to purify sugar.
III.
\( \mathrm{BeCl_2} \) is a dimer in gaseous phase.
Identify the correct statements from the following
I.
All alkaline earth metals give hydrides on heating with hydrogen.
II.
Calcium hydroxide is used to purify sugar.
III.
\( \mathrm{BeCl_2} \) is a dimer in gaseous phase.
I.
All alkaline earth metals give hydrides on heating with hydrogen.
II.
Calcium hydroxide is used to purify sugar.
III.
\( \mathrm{BeCl_2} \) is a dimer in gaseous phase.
Show Hint
Remember: Beryllium compounds often form dimeric structures due to incomplete octets. Also, calcium hydroxide is known for its use in the sugar industry for purification.
Updated On: Jun 6, 2025
- I & III only
- II & III only
- I, II, III
- I & II only
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The Correct Option is B
Solution and Explanation
Step 1: Analyze Statement I
Not all alkaline earth metals form hydrides easily with hydrogen. For instance, beryllium and magnesium do not form stable hydrides under normal conditions.
Hence, Statement I is incorrect. Step 2: Analyze Statement II
Calcium hydroxide (lime water) is commonly used in the purification of sugar by removing impurities.
Thus, Statement II is correct. Step 3: Analyze Statement III
In the gaseous phase, beryllium chloride \( \mathrm{BeCl_2} \) exists as a dimer due to electron deficiency, forming a bridged structure.
Hence, Statement III is correct. Conclusion:
Only statements II and III are correct.
Not all alkaline earth metals form hydrides easily with hydrogen. For instance, beryllium and magnesium do not form stable hydrides under normal conditions.
Hence, Statement I is incorrect. Step 2: Analyze Statement II
Calcium hydroxide (lime water) is commonly used in the purification of sugar by removing impurities.
Thus, Statement II is correct. Step 3: Analyze Statement III
In the gaseous phase, beryllium chloride \( \mathrm{BeCl_2} \) exists as a dimer due to electron deficiency, forming a bridged structure.
Hence, Statement III is correct. Conclusion:
Only statements II and III are correct.
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