Question

distinguish between positive crystals and negative crystals​

Answer 1

Answer:

Positive crystal was arocking the side of earth

And negative crystal absorbing sun light

Answer 2

Answer:

Catalyst is the substance which provides a path to reaction of lower activation energy. It Simply accelerates the rate of reaction and recovers in its original form after the reaction.

Explanation:

Type of catalyst:

1. Positive catalyst
2. Negative catalyst
3. Promoter

• Positive catalyst: The catalyst is employed to increase the rate of reaction. Examples: V₂O₅, MnO₂, Pt etc.
• Negative Catalyst: The substance reduces the rate of reaction. Examples: Phosphoric acid, alcohol etc.
• Promotor: The substance added to elevates the efficiency of the reaction. Example: Mo etc.