Indicators of Chemical Change
Chemistry ⇒ Chemical Reactions and Equations
Indicators of Chemical Change starts at 7 and continues till grade 12.
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A student mixes two clear solutions and observes a yellow solid forming. What indicator of chemical change is this?
A student observes a color change from blue to green when two solutions are mixed. What does this indicate?
Describe one example of a chemical change that involves the evolution of gas.
Describe two indicators that a chemical change has occurred when iron rusts.
A student mixes two clear solutions and observes a yellow solid forming. What indicator of chemical change is this?
A student observes a color change from blue to green when two solutions are mixed. What does this indicate?
Describe one example of a chemical change that involves the evolution of gas.
Describe two indicators that a chemical change has occurred when iron rusts.
Which of the following is a chemical change?
(1) Evaporation of alcohol
(2) Burning of a candle
(3) Breaking of glass
(4) Melting of butter
Which of the following is a chemical change?
(1) Tearing of paper
(2) Burning of wood
(3) Crushing of a can
(4) Boiling of water
Which of the following is an indicator of a chemical change?
(1) Change in density
(2) Change in boiling point
(3) Change in odor
(4) Change in mass
Which of the following is an indicator of a chemical change?
(1) Change in shape
(2) Change in mass
(3) Change in color
(4) Change in size
A white solid forms when solutions of silver nitrate and sodium chloride are mixed. The formation of this solid is an example of ________.
Fill in the blank: The ________ of a new odor during a reaction can indicate a chemical change.
Fill in the blank: The ________ of heat or light during a reaction is a sign of a chemical change.
Fill in the blank: The appearance of a ________ in a solution is a sign that a chemical reaction has occurred.
Is the change in color of leaves in autumn an indicator of a chemical change?
Is the condensation of steam on a cold surface an indicator of a chemical change?
Is the dissolving of salt in water a chemical change?
Is the emission of light during a reaction, such as in fireworks, an indicator of a chemical change?
