Question

26. Which of the following statements about a chemical reaction between sulfur and iron is not
correct?
A. The chemical reaction involves a large amount of heat energy.
B. The new compound has a shiny appearance and good electrical conductivity
C. The atoms of the elements rearrange themselves in a new way.
D. The atoms of the elements recombine in a fixed ratio.
27. Which property is common for mercury and iron?
A. Both are good electrical conductors.
B. Both have the melting points higher than the room temperature.
C. Both have high ductility at room temperature.
D.Both have similar chemical properties.

28. A new element is discovered and placed in the same group as chlorine in the Periodic Table
Which of the following properties is not correct for this new element?
A. It is a poor thermal conductor.
B. It is non-sonorous.
C. It is shiny in appearance.
D. It is brittle.​

Answer 1

Answer:

chemical energy uses more energy so it is good