Question:
An element X reacts with air to form monoxide and nitride. This oxide is amphoteric. It can be converted to its chloride by heating with carbon and chlorine. Which of the following is correct for X?
An element X reacts with air to form monoxide and nitride. This oxide is amphoteric. It can be converted to its chloride by heating with carbon and chlorine. Which of the following is correct for X?
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Diagonal relationships exist between the first element of a period and the second element of the next group due to similar charge-to-size ratios.
Updated On: Jun 9, 2026
- The oxide of X has rock-salt structure
- X belongs to group I of the periodic table
- X shows diagonal relationship with aluminium
- Carbonate of X is thermally very stable
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The Correct Option is C
Solution and Explanation
Concept:
The properties described—forming a monoxide and nitride, having an amphoteric oxide, and converting to chloride via carbon/chlorine heating—are classic markers of Beryllium (Be).
Step 1: Analyze the characteristics of Element X.
Element X forms monoxide (BeO) and nitride (\(Be_3N_2\)). The oxide BeO is amphoteric. The conversion of oxide to chloride is a standard industrial process for Beryllium: \[ BeO + C + Cl_2 \rightarrow BeCl_2 + CO \]
Step 2: Compare with properties of Group 2 elements.
Beryllium is the first element of Group 2. It exhibits a diagonal relationship with Aluminium (Group 13), sharing several chemical similarities such as amphoteric oxides and the ability to form covalent compounds. \[ \boxed{\text{X shows diagonal relationship with aluminium}} \]
Step 1: Analyze the characteristics of Element X.
Element X forms monoxide (BeO) and nitride (\(Be_3N_2\)). The oxide BeO is amphoteric. The conversion of oxide to chloride is a standard industrial process for Beryllium: \[ BeO + C + Cl_2 \rightarrow BeCl_2 + CO \]
Step 2: Compare with properties of Group 2 elements.
Beryllium is the first element of Group 2. It exhibits a diagonal relationship with Aluminium (Group 13), sharing several chemical similarities such as amphoteric oxides and the ability to form covalent compounds. \[ \boxed{\text{X shows diagonal relationship with aluminium}} \]
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