BPSC CCE Prelims
Metallurgy Previous Year Questions (PYQs)
Practice solved questions for Metallurgy with detailed step-by-step solutions, key insights, and trend analysis for BPSC CCE PRELIMS.
Solved Previous Year Questions
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The metallurgical process in which a metal is obtained in a fused state is called
Detailed Explanation:
Smelting is the metallurgical process where ore is heated with a reducing agent (like coke) to extract the metal in a fused (molten) state, separated from slag.
Roasting converts sulfides to oxides in excess air, calcination removes volatile impurities in limited air, and froth flotation is a physical concentration method—none produce molten metal directly.
Therefore, only smelting yields metal in a fused state, making Option 4 the correct answer.
Which among the following are constituents of brass?
Detailed Explanation:
Brass is an alloy composed primarily of copper (Cu) and zinc (Zn). The proportion of these two metals can vary (typically 55–95% copper, 5–45% zinc), affecting properties like color, hardness, and corrosion resistance.
Other options are incorrect: Iron and zinc do not form brass; copper and nickel form cupronickel; iron and copper is not a standard brass alloy.
Therefore, zinc and copper are the constituents of brass, making Option 4 the correct answer.
Which among the following is also known as white metal?
Detailed Explanation:
Platinum is a lustrous, dense, silver-white precious metal with high corrosion resistance and catalytic properties. It is commonly referred to as white metal due to its natural silvery-white appearance.
Gold is yellow, copper is reddish-brown, and cobalt is greyish-blue—none match the white metal descriptor. While industrial alloys of tin/lead are sometimes called "white metal," in UPSC/general knowledge context, platinum is the standard answer.
Therefore, platinum's silvery-white color makes Option 2 the correct answer.
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Consider the following statements with respect to noble metals :
- Noble metals are found in pure form in nature.
- Uranium and lead are examples of noble metal.
Which of the above statements is/are correct?
Detailed Explanation:
Noble metals (gold, silver, platinum, and platinum-group metals) are chemically inert, resist corrosion, and are typically found in pure native form in nature due to their nonreactive properties.
- Statement 1 is Correct: Noble metals like gold and platinum occur naturally in uncombined, pure metallic state.
- Statement 2 is Incorrect: Uranium and lead are highly reactive metals that occur as ores (e.g., uraninite, galena), not as noble metals.
- Therefore, only Statement 1 is correct, making Option 4 the correct answer.
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