Quiz 1 Class 7th Gen Science Chemical changes
What is the name of the compound formed when iron and sulfide are heated together?
Iron oxide
Iron sulphite
Iron sulphide
Iron sulphate
Combustion in human body is called
Inspiration
Expiration
Respiration
Restoration
What is the name of the chemical reaction that needs heat energy to start or carry on
Endothermic
Exothermic
Indothermic
Oxothermic
The chemicals involved in chemical reaction are called
Inputs
Outputs
Products
Reactants
What is used to decompose a compound in a thermal decomposition
Heat
Light
Sound
Electricity
A _____ of Iron and Sulfur can be separated with a magnet.
Element
Compound
Mixture
Molecules
The diagram above shows some elements,mixture and compound. Which diagram shows an element
B
A
C
D
Which ABOVE diagram shows a compound
D
A
C
B
Which ABOVE diagram shows a mixture of elements
B
A
D
C
Which diagram shows an incomplete chemical reaction between two elements
D
A
B
C
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