Two white-colored solids were mixed in a beaker. The mixture remained white, and the beaker began to turn cold after a few minutes. Why has a chemical reaction occurred?

Which of the following is evidence of a chemical reaction?

Which of the following involves a chemical reaction?

Which of the following involves a chemical reaction?

Two homogeneous liquids are mixed together. What evidence suggests that a chemical reaction is occurring?

A piece of metal was dropped into a beaker of clear liquid.The metal sank to the bottom and bubbles began to form in the liquid. Why is there a chemical reaction?

Sodium hydroxide pellets are added to an open container of water. What evidence suggests that a chemical reaction is occurring?

Which of the following involves a chemical reaction?

Which of the following is evidence of a chemical reaction?

Which of the following is a compound?

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