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Standard 1 Objective 4 Part 1
Test Description: Identify the observable features of chemical reactions
Instructions: Answer all questions to get your test result.
1) Vinegar is added to baking soda and bubbles of carbon dioxide rapidly form. A cloudy liquid is left behind. What are the products in this chemical reaction?
A
Carbon dioxide and the cloudy liquid
B
Vinegar and the cloudy liquid
C
Vinegar and baking soda
D
Carbon dioxide and baking soda
2) Water in the form of rain is chemically combined with sulfur dioxide and oxygen to create sulfuric acid, which becomes acid rain. In this reaction, what is the product?
A
Sulfuric acid
B
Oxygen
C
Water
D
Sulfur dioxide
3) Lead Nitrate + Sodium Iodide->Sodium Nitrate +Lead Iodide What are the products of this equation?
A
Lead nitrate, sodium iodide
B
Sodium iodide, lead iodide
C
Lead nitrate, sodium nitrate
D
Sodium nitrate, lead iodide
4) Water in the form of rain is chemically combined with sulfur dioxide and oxygen to create sulfuric acid, which becomes acid rain. In this reaction, what are the reactants?
A
Water, sulfuric acid and sulfur dioxide
B
Oxygen, water adn sulfuric acid
C
Sulfuric acid, sulfur dioxide and oxygen
D
Sulfur Dioxide, oxygen and water
5) Lead Nitrate + Sodium Iodide->Sodium Nitrate +Lead Iodide What has happened to the atoms of the reactants?
A
They have changed into new atoms
B
They have recombined to form the products
C
They have new names and places
D
Some have been lost to the environments
6) If 4 carbon atoms undergo a chemical reaction with oxygen to form CO2 molecules, how many carbon atoms will be found in the product?
A
Three
B
Four
C
Two
D
One
7) Our body breaks down food using chemical reactions. What is this process called?
A
Combustion
B
Production
C
Photosynthesis
D
Respiration
8) A biologist studies photosynthesis and describes it as a biological process. A chemist studies it and calls it a chemical reaction. Which scientist is right?
A
Neither, if scientists don't agree, then conclusions cannot be made
B
The biologist because it is a biological process occurring in cells
C
Both they use different terms but agree on the reactants and products
D
The chemist because photosynthesis has both reactants and products
9) What is one way the development of synthetic fibers, like nylon, has affected the clothing we wear?
A
Synthetics don't burn
B
Synthetics are waterproof
C
Natural fibers wear longer
D
Synthetics have more stretch
10) The law of conservation of mass states that matter is not gained or lost in a reaction. Which of the following correctly restates this law? In a chemical reaction
A
Matter is gained and lost depending on how much energy is added
B
The amount of mass is equal to the sum of the reactants and products
C
Matter is gained and lost but energy is conserved
D
The amount of mass of the reactants will equal the mass of the products
*select an answer for all questions
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