A yellow solid X was heated in a lab. Which can only dissolve in Carbon (IV) Sulphide (CS2) when it was heated until 100°C it formed Y. The next day it found to have formed Z.

1)Name X,Y and Z
2) Differentiate between Y and Z.

1 answer

1)

X: Sulfur
Y: Sulfur vapor
Z: Sulfur dioxide

2)

Y is sulfur vapor, which is the gaseous form of sulfur. It is formed when solid sulfur (X) is heated at 100°C and undergoes sublimation, directly changing from a solid to a gas phase without passing through the liquid phase.

Z is sulfur dioxide, a chemical compound formed when sulfur vapor (Y) reacts with oxygen in the air. This reaction occurs over time, so when the lab checked the next day, they found that sulfur vapor had reacted with oxygen to form sulfur dioxide (Z).
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