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WorksheetsQuiz on Chemical Reactions
Total questions: 24
Worksheet time: 14mins
The reaction between a substance and oxygen is called ____, and the substance is called ____
Combustion; Burner
Reduction; Fuel
Combustion; reactant
None of the above
In which type of reaction is thermal energy given out?
(a)
C+O2 ---> CO2: Name the reactants
(a)
What does dissipate mean?
Become scattered in the surroundings
Combustion
Become stored as potential energy
Disappear
What types of energy is given out due to burning?
Light and Thermal
Sound and Nuclear
Kinetic
Light, Sound and Thermal
Mg + HCl --->?
Balance this equation
Mg+2HCl--> 2MgCl+H2
2MG+HCl--> Mg2HCL
Mg+HCl--> MgCl2+H2
2(Mg+HCl)--> MgCl2 + H
What is the reaction between Hydrogen and any other substance called?
Combustion
Hydrolisis
Burning
Hydrogenation
Which of the following equations is incorrect?
Magnesium + Water---> Magnesium Oxide + Hydrogen
Potassium + Water ---> Potassium hydroxide + Hydrogen
Oxygen + Carbon---> Carbon Monoxide/ Carbon Dioxide
Calcium + Nitric acid---> Calcium Nitrate + Hydrogen
All of the above
What is an endothermic reaction?
A reaction in which thermal energy is given out
A reaction in which energy is absorbed
A reaction in which thermal energy is produced
A reaction which gives out light
(a) + Citric acid ----> Sodium citrate + Water + Carbon Dioxide
Hint: NaHCO3
What is the difference between an endothermic reaction and an endothermic process?
An endothermic reaction is chemical while an endothermic process is physical
Endothermic reaction absorbs energy while in an endothermic process energy is given out
In an endothermic process light energy is produced while in an endothermic reaction sound energy is produced
All of the above
Self-heating can is an example of?
Endothermic process
Exothermic process
Exothermic reaction
Endothermic reaction
None of the Above
Water and ____ are usual components of self-cooling ice packs.
Ammonium Citrate
Ammonium Oxide
Ammonium Chloride
Ammonium Nitrate
A substance that is chemically inactive is known as?
Radioactive
Insulator
Inert
Catalyst
Which substance does not react with oxygen?
(a)
Why are sodium, calcium and potassium stored under kerosene oil?
Because they form oxides
Because they are highly reactive
Because they can only react in the presence of kerosene
Because they can become dull
What is the chemical formula of rust?
FeO2O3H2O
2Fe2O3H2O
4Fe(OH)3
Fe2O3
Rust is formed in the presence of:
DiHydrogenMonoOxide and Oxygen
Carbon and Oxygen
Water and Zinc
None of the above
True or False: Painting of Iron can stop Rusting.
True
False
What kind of Paint?
True or False: Magnesium will react more rapidly with steam than water
False
TRUE
2Al + 6H2O ---> ___ + 3H2
Al(OH)6
2AlOH
6Al(O2H)3
2Al(OH)3
Metal + Hydrochloric Acid ----> ?
Metal Chloride
Metal Oxide+ Hydrogen
Metal Hydroxide + Chlorine
None of the above
Ca + 2H2O ---> ?
Ca(OH)2 + H2
Ca(OH)3
CaOH
2Ca(OH) +H2
Zinc + Water --->
Zinc Hydroxide
Zinc Oxide
Zinc Hydroxide+ Water
Zinc Hydroxide + Hydrogen
