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 adds hydrochloric acid to zinc and observes the release of hydrogen gas. Which indicator of chemical change is being observed?
A student mixes two clear solutions and observes a yellow color forming. What indicator of chemical change is being observed?
A student mixes two colorless solutions and observes a cloudy white substance forming. What indicator of chemical change is this?
A student observes a temperature increase when two chemicals are mixed. What type of reaction is likely occurring?
A student adds hydrochloric acid to zinc and observes the release of hydrogen gas. Which indicator of chemical change is being observed?
A student mixes two clear solutions and observes a yellow color forming. What indicator of chemical change is being observed?
A student mixes two colorless solutions and observes a cloudy white substance forming. What indicator of chemical change is this?
A student observes a temperature increase when two chemicals are mixed. What type of reaction is likely occurring?
Which of the following is a chemical change?
(1) Dissolving salt in water
(2) Burning magnesium ribbon
(3) Melting wax
(4) Crushing a can
Which of the following is a chemical change?
(1) Evaporation of water
(2) Combustion of methane
(3) Sublimation of iodine
(4) Dissolving salt in water
Which of the following is a chemical change?
(1) Tearing paper
(2) Burning paper
(3) Folding paper
(4) Wetting paper
Which of the following is an example of a chemical change based on its indicator?
(1) Water freezing
(2) Milk turning sour
(3) Breaking glass
(4) Dissolving sugar
A white solid forms when solutions of silver nitrate and sodium chloride are mixed. The formation of the white solid is an example of ________.
Fill in the blank: The ________ of a gas when an acid reacts with a metal is an indicator of a chemical change.
Fill in the blank: The ________ of light during a chemical reaction, such as in glow sticks, is an indicator of a chemical change.
Fill in the blank: The burning of a candle is a chemical change because it produces ________ and ________.
Is a change in odor always a reliable indicator of a chemical change?
Is the change in color of litmus paper an indicator of a chemical change?
Is the change in temperature during a reaction always a sign of a chemical change?
Is the emission of light during a reaction, such as in fireworks, an indicator of a chemical change?
