A student adds vinegar to baking soda and observes bubbles. The bubbles suggest:

Type: MCQ • Marks: 1

A. Only a physical change always occurred

B. A gas may be forming in a chemical reaction

C. The mixture is freezing

D. No change occurred

Explanation

Gas evolution is a common sign of chemical reaction.

Want to attempt the full test series with a timer and instant score? Purchase the package to unlock the complete test. Purchase Now

Class 7th Curiosity

This page is indexed for search so students can find questions directly from Google.

Welcome to TutorWale!