Q1: Identify the correct statement.

ANS:C - Lead can be produced in a blast furnace.

The correct statement is: Lead can be produced in a blast furnace. Explanation: Lead is commonly produced in a blast furnace through a process known as smelting. In this process, lead ore, usually galena (lead sulfide), is heated in a blast furnace along with fluxes (such as limestone) and reducing agents (such as coke). The heat generated in the blast furnace melts the lead ore, allowing the lead to be separated from other impurities and collected as molten lead at the bottom of the furnace. This molten lead is then cast into ingots for further processing. The other statements are incorrect:

• Sphalerite is not zinc oxide; it is zinc sulfide.
• The first law of thermodynamics is stated as ΔE = ΔQ - ΔW, where ΔE represents the change in internal energy of a system, ΔQ represents the heat added to the system, and ΔW represents the work done by the system.
• T. ferrooxidans is a bacterium, not a fungus, and it is used for bioleaching of minerals containing metals like copper, not chalcopyrite specifically.