Genie
Click on the correct answer
1
The decomposition of hydrogen peroxide
is exothermic
produces water
produces hydrogen gas
is an example of a decomposition reaction
produces oxygen
2
Vapor is
a gas
a fine solid suspension
a partially condensed gas
smoke
the result of fire
3
A catalyst
is one of the reactants in a chemical reaction
is one of the products in a chemical reaction
may be a solid, liquid, or gas
enters into a reaction to make it go faster but is unchanged at the end of the reaction
enters into the reaction to make it go faster and is converted to a new substance
4
The best scientific term for what emerges from the flask is
a genie
a gas
a cloud
a vapor
5
This reaction
was endothermic
was exothermic
was rapid
was slow
gave off flame
6
The heat liberated in the reaction
caused the water produced in the reaction to convert into vapor
created an ice cloud of water vapor
is a "negative heat of reaction"
is a "positive heat of reaction"
7
The three most common states of matter are
plasma
vapor
gas
liquid
solid
8
The hydrogen peroxide used in this experiment
was more concentrated than the hydrogen peroxide you can buy at the drugstore
was less concentrated than the hydrogen peroxide you can buy at the drugstore
was the same concentration as the hydrogen peroxide you can buy at the drugstore
9
If a solution is 30 percent hydrogen peroxide, the remaining 70 percent is
oxygen
water
hydrogen
10
The catalyst in this experiment
was hydrogen peroxide
was oxygen gas
was water
was not revealed
was manganese dioxide