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WorksheetsScience Quiz for Grade 8
Total questions: 17
Worksheet time: 17mins
What is the process of replacing a less reactive element with a more reactive one in a compound called?
Substitution reaction
Combination reaction
Decomposition reaction
Displacement reaction
Which metal is more reactive: gold or sodium?
Sodium
Carbon
Gold
wood
What is the product formed when magnesium reacts with water?
Magnesium oxide
Magnesium hydroxide
Magnesium chloride
Magnesium sulphate
What is the role of phenolphthalein in the reaction of magnesium with water?
To accelerate the reaction
To indicate an alkaline solution
To slow down the reaction
To neutralize the solution
Which metal can displace hydrogen from hydrochloric acid?
Zinc
Copper
Gold
Silver
Phenolphthalein show ……………. colour in alkali.
(a)
Magnesium displaces hydrogen from water to form …………………
(a)
A ……………………reaction is used to weld railway track.
(a)
Indigestion due to excess HCl is treated with ………………..
Name the metals around magnesium which are more reactive than magnesium
Which metal is less reactive than magnesium
Use the general word equation to help you write the word equation the reactions between magnesium and sulfuric acid
zinc and hydrochloric acid
Calcium and nitric acid
In an investigation into displacement reactions, make predictions and explain your answers for reactions between silver metal and gold nitrate
zinc in a copper sulfate solution
Magnesium with copper sulfate write products
