Question:
Which of the following is a correct statement?
Which of the following is a correct statement?
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Alkali metals react with nitrogen to form nitrides only in the case of lithium due to its small size and high lattice energy.
Updated On: Jun 19, 2026
- Be(OH)\(_2\) is a basic hydroxide
- LiF has low lattice energy than LiCl
- Lithium can form nitride with nitrogen
- Super oxide of potassium is diamagnetic in nature
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The Correct Option is C
Solution and Explanation
Step 1: Analyzing lithium compounds.
Lithium is a small cation with high charge density and can react with nitrogen to form lithium nitride (Li\(_3\)N).
Step 2: Analyzing Be(OH)\(_2\).
Be(OH)\(_2\) is amphoteric, not purely basic, so option 1 is incorrect.
Step 3: Lattice energy consideration.
LiF has higher lattice energy than LiCl because fluoride ion is smaller than chloride, making option 2 incorrect.
Step 4: Superoxide of potassium.
Potassium superoxide (KO\(_2\)) is paramagnetic due to the unpaired electron in the O\(_2^-\) ion, so option 4 is incorrect.
Step 5: Conclusion.
Thus, the correct statement is option 3: Lithium can form nitride with nitrogen.
Lithium is a small cation with high charge density and can react with nitrogen to form lithium nitride (Li\(_3\)N).
Step 2: Analyzing Be(OH)\(_2\).
Be(OH)\(_2\) is amphoteric, not purely basic, so option 1 is incorrect.
Step 3: Lattice energy consideration.
LiF has higher lattice energy than LiCl because fluoride ion is smaller than chloride, making option 2 incorrect.
Step 4: Superoxide of potassium.
Potassium superoxide (KO\(_2\)) is paramagnetic due to the unpaired electron in the O\(_2^-\) ion, so option 4 is incorrect.
Step 5: Conclusion.
Thus, the correct statement is option 3: Lithium can form nitride with nitrogen.
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