Ammonium Dichromate
Click on the correct answer
1
In this demonstration a single substance forms more than one substance. This kind of chemical reaction is
a combination reaction
a single replacement reaction
a double displacement reaction
a metathetical reaction
a decomposition reaction
2
A chemical reaction in which there is an exchange of electrons is known as
an acid-base reaction
a double replacement reaction
a redox reaction
3
Redox refers to
a loss of electrons by the substance which is oxidized
a gain of electrons by the substance which is reduced
a loss of electrons by the reducing agent
a loss of electrons by the substance which undergoes oxidation
a gain of electrons by the oxidizing agent
4
This reaction
was endothermic
was exothermic
started without any added energy
needed some activation energy to start the reaction
5
In this reaction chromium started in the 6+ state but was converted to the 3+ state found in the product. This change is
oxidation of the chromium from 6+ to 3+
oxidation of the chromium from 3+ to 6+
reduction of the chromium from 6+ to 3+
reduction of the chromium from 3+ to 6+
6
The color change from reactant to product was
colorless to red
red to green
orange to green
green to orange
7
This demonstration used
a liquid
a solid
an inorganic substance
an organic substance
8
The reaction products in this demonstration included
water
ammonium dichromate
nitrogen gas
chromium(III)oxide
hydrogen peroxide
9
The reactant in this demonstration
is very unstable when heated
produced heat when it reacted
produces heat in units of either kilojoules or calories
contained chromium in the 6+ oxidation state
decomposed into three products
10
Which is (are) true of the reaction in this demonstration?
It is a redox reaction
It is an oxidation reaction only
It is an exothermic reaction
It is a combination reaction
It is a decomposition reaction