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Chemistry Core Concepts
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Question
Which element produces a bright green color in a flame test?
Page 1
Answer
Barium
Question
Is a chemical reaction a rearrangement of the elements in the reactants?
Page 1
Answer
True
Question
What color indicates a properly adjusted Bunsen burner flame?
Page 1
Answer
Blue
Question
Which of the following indicate that a chemical reaction has occurred: formation of a precipitate, gas bubbles forming, or color change?
Page 1
Answer
All of them: formation of a precipitate, gas bubbles forming, and color change
Question
When white light passes through a prism, the continuous spectrum ranges from what colors?
Page 2
Answer
Violet to red
Question
What separation technique uses filter paper, a solvent, and sometimes a funnel to separate mixtures based on differences in solubility?
Page 2
Answer
Chromatography
Question
In addition to laboratories, where else do chemical processes take place?
Page 2
Answer
In manufacturing plants and in nature
Question
True or false: Chromatography is a technique for separating colored components of a mixture using paper.
Page 2
Answer
True
Question
If you cut a piece of steel in half, what happens to its density?
Page 2
Answer
It remains the same
Question
What is the chemical formula for carbon monoxide?
Page 3
Answer
\(CO\)
Question
What gas is produced when \(NaHCO_3\) or \(CaCO_3\) (but not \(NaCl\)) reacts with \(HCl\)?
Page 3
Answer
Carbon dioxide (\(CO_2\))
Question
Do the units meter (length), gram (mass), and liter (volume) accurately measure these quantities in a lab setting?
Page 3
Answer
Yes (true)
Question
True or false: Organic materials containing carbon burn with a bright yellow flame.
Page 3
Answer
True