Powdered sulfur is yellow, and powdered iron is gray. When powdered sulfur and powdered iron are mixed at 20°C, the powdered iron

A. becomes yellow
B. remains ionic
C. becomes a liquid
D. remains magnetic

The correct answer is **D. remains magnetic. **
When powdered iron and powdered sulfur are mixed at 20degrees Celcius the powdered iron will remain magnetic. Iron powder is used in the production of magnetic alloys and other certain types of steels. As a whole iron, its formed from other several iron particles. Iron powder is classified into atomized powder, electrolyte iron powder, and reduced iron powder.

Answered by JABARBS | 2024-06-11

The correct answer is A. becomes yellow. The most accurate observation of the mixture at 20°C is that the powdered iron appears to become yellow due to the presence of the yellow sulfur.
When powdered sulfur, which is yellow, is mixed with powdered iron, which is gray, at 20°C, a chemical reaction does not occur between the two substances. Instead, the mixture simply consists of small particles of yellow sulfur and gray iron. Due to the fine nature of the powders, the gray color of the iron may be partially or completely masked by the yellow sulfur, causing the mixture to appear yellow. The iron does not lose its magnetic properties, but visually, the mixture will take on the color of the sulfur. Therefore, the powdered iron becomes yellow in appearance.
The other options can be ruled out based on the following reasoning:
B. remains ionic - Iron and sulfur are both elements, and when they are mixed as powders at room temperature, they do not form ionic bonds. They remain as separate elements in the mixture.
C. becomes a liquid - Neither sulfur nor iron melts at 20°C, so the mixture does not become a liquid.
D. remains magnetic - While iron is magnetic, the question asks about the visual change of the powdered iron when mixed with sulfur. The iron does not lose its magnetic properties, but the question is specifically asking about the color change, not the magnetic properties.
Therefore, the most accurate observation of the mixture at 20°C is that the powdered iron appears to become yellow due to the presence of the yellow sulfur.

Answered by AnkitM | 2024-06-25

The powdered iron remains magnetic when mixed with powdered sulfur at 20°C, as no chemical reaction occurs between the two substances, and their individual properties are retained. Therefore, the correct answer is option D. remains magnetic.
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Answered by JABARBS | 2024-09-26