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WorksheetsMaterial properties
Total questions: 18
Worksheet time: 13mins
1. Which observation(s) might be used as evidence that a chemical reaction occurred?
Color change
Odor change
Properties change
All of the above
________ result(s) in no new substances.
A physical change
A chemical change
Physical and chemical changes
None of the above
Which is an example of a physical change?
Burning wood
Freezing water
Rust on a car
Cooking food
Which is an example of a chemical change?
Burning wood
Burning wood
Burning wood
All of the above
If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?
4 atoms
10 atoms
5 atoms
1 atom
Which of the following describes a precipitate?
Which of the following describes a precipitate?
a solid forms when one liquid is poured into another
a gas forms when a solid is placed in a liquid
bubbles form when an acid is poured on a rock
Digesting your food is an example of
chemical change
physical change
Some hydrochloric acid is added to calcium carbonate in a test tube. The students observed bubbles and fizzing. The gas is ....
oxygen
nitrogen
carbon dioxide
hydrogen
In the above reaction, to test for the gas I could ...
Bubble it through limewater and it will go milky
do the pop test and it will burn
Light a taper and it will burn brighter
note the colour change to yellow
In another reaction, the student places a piece of metal into a test tube and adds an acid again. Its fizzes ..
The gas produced is called...
carbon dioxide
hydrogen
oxygen
helium
When some silver nitrate solution was added to Calcium chloride in a test tube, the reaction produced a...
White solid precipitate
fizzing colourless gas
increase in temperature in the test tube
while cloudy precipitate
Finish of the following word equation
Copper carbonate + hydrochloric acid = Carbon Dioxide + copper chloride + ______.
water
hydrogen
oxygen
copper
Complete the word equations.
magnesium + hydrochloric acid →
magnesium chloride + hydrogen
magnesium chloride
magnesium chloride + water
magnesium chloride + carbon dioxide
Complete the sentence.
During a chemical reaction, atoms ________.
can appear
can disappear
get rearranged
stop moving and vibrating
In a chemical reaction, the mass of the reactants is 200 grams. Which of the following could represent the mass of the products?
26.6 grams.
200 grams
3.3 grams.
2000 grams
Complete the sentence.
During a chemical reaction, atoms ________.
can appear
can disappear
can rearrange
stop moving and vibrating
Which of the following describes the law of conservation of mass?
The mass of the reactants is greater than the mass of the products.
The mass of the products equals the mass of the reactants.
The mass of the products is greater than the mass of the reactants.
The products will have the same states of matter as the reactants.
A chemical reaction that absorbs heat
Exothermic
Endothermic
