Chemistry Q135 – AP-EAMCET 2026

Home Chemistry Basic ChemistryQuestion #17

Galena is the sulphide ore of element X and cassiterite is the oxide ore of Y. What are X and Y respectively?

Clue 1 of 3: Common Ores and Elements

Recall the common ores of various metals and their chemical compositions. Ores are naturally occurring rocks or minerals from which a metal or non-metal can be extracted.

🧠 Full Solution Path

Step 1: Identify Element X from Galena✦ Active

Galena is a well-known sulfide ore. Its chemical name is Lead(II) sulfide.

G a l e n a = P b S

From the chemical formula, the metallic element in Galena is Lead. Therefore, element $X$ is $P b$ .

Step 2: Identify Element Y from Cassiterite○ Expand

Cassiterite is a common oxide ore. Its chemical name is Tin dioxide.

C a s s i t e r i t e = S n O_{2}

From the chemical formula, the metallic element in Cassiterite is Tin. Therefore, element $Y$ is $S n$ .

Step 3: Combine the Identifications○ Expand

Based on the analysis, element $X$ is $P b$ and element $Y$ is $S n$ .

💡 Teacher's Secret Hint

Knowing common ores and their corresponding metals is fundamental in metallurgy and general chemistry. Memorize the names and formulas of important ores.

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Chemistry Question 135 – AP-EAMCET 2026

Clue 1 of 3: Common Ores and Elements

🧠 Full Solution Path