Which changes are evidence of a chemical reaction?

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A beaker of water becomes cool to the touch upon adding a saltto it.

A cloudy solution becomes clear upon adding another solution toit.

Bubble formation on chalk added to acid

Water condensing

Bubbles forming in a shaken water bottle

Evidence

Not evidence

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Part B

In a lab, silver nitrate,AgNO3, is dissolved in water until nosolid is observed in the container. Then, a solution of sodiumchloride, NaCl, is added to the container. When you combinethese aqueous solutions, there is no noticeable change intemperature; however, a solid precipitates and there is a slightchange of color.

Which statements about the lab experiment involving silvernitrate and a sodium chloride solution are true?

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The color change of the solution indicates a chemical reactionoccurred.

Formation of a solid indicates a chemical reaction occurred.

The initial disappearance of silver nitrate in water indicates achemical reaction occurred.

The lack of temperature change indicates a chemical reactiondidn't occur.

A chemical reaction did occur when the solutions werecombined.

A chemical reaction occurred when silver nitrate was added towater.

True

False