NEW
Font size
WorksheetsUnit 1 lesson 1&2 sec. term
Total questions: 12
Worksheet time: 4mins
Decomposes into water and carbondi-oxide
carbonic acid
metal carbonate
metal hydroxide
metal sulphate
Burns with pop sound
carbon dioxide gas
sulfur tri-oxide gas
oxygen gas
hydrogeb gas
what is the name of this reaction
simple substitution
direct combination
neutralization
thermal decomposition
which of the following reactions is the fastest?
lead with copper sulfate
iron with copper sulfate
sodium with copper sulfate
zinc with copper sulfate
the substance that loses oxygen during chemical reaction may also -----------
gains electrons
gains hydrogen
loses electrons
1,2 are correct
the process in which the atom gains an electron or more
oxidation
reduction
neutralization
all the previous
which curve represents the change in the concentration of reactants in time
A
B
Both are right
Both are wrong
what is the color of the precipitate produced from this reaction?
red ppt
white ppt
yellowish white ppt
black ppt
which of the following is a salt
HCl
NaOH
CO2
AgNO3
CuO + H2 → Cu + H2O
which substance is reduced?
H2
Cu
H2O
CuO
which of the following factors decreases the rate of chemical reaction?
increasing temperature
diluting acids
using positive catalyst
no correct answer
Cu(OH)2 → +
Cu, H2O
Cu, H2
CuO, H2O
Cu, O2
