Characteristics of Chemical Reactions
Chemistry ⇒ Chemical Reactions and Equations
Characteristics of Chemical Reactions starts at 7 and continues till grade 12.
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A white precipitate forms when solutions of silver nitrate and sodium chloride are mixed. This is an example of which characteristic of chemical reactions?
Describe two characteristics that can help you identify a chemical reaction has occurred.
Describe what is meant by the term 'precipitate' in the context of chemical reactions.
Explain why dissolving salt in water is not considered a chemical reaction.
A white precipitate forms when solutions of silver nitrate and sodium chloride are mixed. This is an example of which characteristic of chemical reactions?
Explain why dissolving salt in water is not considered a chemical reaction.
Explain why the burning of magnesium ribbon in air is considered a chemical reaction.
Explain why the change in color of copper when exposed to air is considered a chemical reaction.
Which of the following is a chemical reaction?
(1) Evaporation of alcohol
(2) Respiration in living organisms
(3) Dissolving sugar in tea
(4) Melting of wax
Which of the following is a chemical reaction?
(1) Melting of ice
(2) Boiling of water
(3) Souring of milk
(4) Breaking a stick
Which of the following is a physical change, not a chemical reaction?
(1) Burning of coal
(2) Sublimation of iodine
(3) Cooking of an egg
(4) Fermentation of sugar
Which of the following is a sign of a chemical reaction?
(1) Dissolving sugar in water
(2) Boiling water
(3) Change in color
(4) Breaking glass
Fill in the blank: A chemical reaction is always accompanied by a ________ change.
Fill in the blank: The ________ of a gas during a reaction is a common sign of a chemical change.
Fill in the blank: The ________ of a gas, such as bubbles in a reaction, is a sign of a chemical change.
Fill in the blank: The ________ of a substance is a common indicator of a chemical reaction, such as when silver turns black.
Is the boiling of water a chemical reaction?
Is the change in odor during a reaction a sign of a chemical reaction?
Is the emission of light always a sign of a chemical reaction?
Is the formation of curd from milk a chemical reaction?
