लिमोनाइट (Limonite) निम्नलिखित में से किस धातु का एक अयस्क/खनिज है?

The amalgamation process is primarily used to extract which of the following metals?

The crude iron directly obtained from the reduction of iron ore in a blast furnace is known as:

Match List-I (Metal) with List-II (Refining Process) and select the correct answer using the codes given below: List-I: a) Ni, b) Cu, c) Zr, d) Ge List-II: 1) Van Arkel process, 2) Electrolysis, 3) Mond process, 4) Zone refining