Q1: Percentage of gaunge is maximum in the ore of

ANS:B - gold

The ore with the highest percentage of gangue is typically the ore of gold. Explanation:

1. Gangue: Gangue refers to the non-valuable minerals or materials that are found alongside the desired ore in a mineral deposit. These minerals do not contain the desired metal or valuable mineral and are typically removed during ore processing to extract the valuable metal.
2. Gold Ore: Gold ores often contain relatively high percentages of gangue minerals compared to other metallic ores. This is because gold is often found in association with various minerals, including quartz, pyrite, calcite, and other non-metallic minerals. These gangue minerals can make up a significant portion of the ore body, leading to a higher percentage of gangue in gold ores.
3. Iron Ore: While iron ores also contain gangue minerals, they are often less abundant compared to gold ores. Iron ores typically contain gangue minerals such as silica (in the form of quartz or chert), alumina (in the form of clay minerals), and other impurities. However, the percentage of gangue in iron ores can vary depending on the specific ore deposit and geological conditions.
4. Zinc Ore: Zinc ores, such as sphalerite (ZnS) or zinc carbonate minerals, may also contain gangue minerals such as quartz, calcite, dolomite, and other non-metallic minerals. However, the percentage of gangue in zinc ores may not be as high as in gold ores.
5. Copper Ore: Copper ores typically contain gangue minerals such as quartz, calcite, feldspar, and various sulfide minerals. While gangue minerals are present in copper ores, the percentage of gangue may vary depending on the specific ore deposit and mineralization processes.