Share 10C Chemistry 1st Midterm General Review
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Copper is sometimes used to make cooking utensils.3 of properties of copper are shown below: 1. Good conductor of electricity 2. Corrosion resistant 3. Good conductor of heat .Which of these properties make it good for cooking utensils?
2&3
Which metal is in liquid state at room temperature?
Mercury
Zinc granules give hydrogen gas when treated with dilute solution of:A)FeO B)HCl C)NaCl D)Ammonia
B) HCl
What are the products formed from the reaction between sodium and cold water?
sodium hydroxide and hydrogen
Most of metals which occur in their native state in nature:A)are very active B)do not form any compound C)are not reactive D)are moderately reactive
C)are not reactive
What is an alloy?
A mixture of a metal with one or more other elements.
Select the least reactive metal:A)magnesium B)sodium C)potassium D)zinc
D)zinc
magnesium + steam →
magnesium oxide + hydrogen (magnesium very slowly with cold water)
In which reaction would displacement happen?A)copper + magnesium sulfate B) iron + calcium sulfate C)magnesium + copper sulfate D)iron + potassium sulfate
C)magnesium + copper sulfate
Why is pure iron not used for bridges?A)too malleable B)too resistant to corrosion C)too conductive D)not shiny enough
A)too malleable
Which of the following does not prevent rusting of iron?A)painting,oiling,galvanizing B)attach to a piece of copper C)connect to a piece of magnesium with copper wire D)cover entirely with copper
B)attach to a piece of copper
What is the chemical name given to rust?
hydrated iron(III) oxide
Covering iron with zinc is called ______________, and the zinc stops the iron from rusting.
galvanisation
Name a chemical that can be used to test the presence of water.
anhydrous copper(II) sulfate (white to blue) OR anhydrous cobalt(II) chloride(blue to pink)
What is the chemical used to kill bacteria in water in the water treatment plant?
chlorine
Which gas contributes to acid rain?
oxides of nitrogen(e.g:nitrogen dioxide) OR sulfur dioxide
