10C Chemistry 1st Midterm General Review | Baamboozle - Baamboozle

State 2 harmful effects of nitrogen oxides.

acid rain, photochemical smog, respiratory problem

Iron is made by burning its ore, hematite. Hematite contains silica. What reacts with this impurity to remove it?

Calcium Oxide

Silicon dioxide

Carbon

Carbon dioxide

Which reaction is used to keep the blast furnace hot?

C + O2 -> CO2

CaCO3 → CaO + CO2

CO2 + C -> 2CO

Fe2O3 + 3CO → 2Fe + 3CO2

The ability of metal to be hammered into sheets is called ________.

malleability

Which is NOT a use of zinc?A)sacrificial protection B)galvanising C)making bronze D)making brass

C)bronze-(copper+tin)

Which is NOT a use of aluminium?A)food containerB)aircraft bodies C)electricity cable D)insulator

D)insulator

In the past, refrigerators, aerosol spray propellants and cleaning solvents were all sources of a greenhouse gas known as

CFC

What is the percentage of nitrogen in the atmosphere?

78%

Which gas contributes to acid rain?

oxides of nitrogen(e.g:nitrogen dioxide) OR sulfur dioxide

What is the chemical used to kill bacteria in water in the water treatment plant?

chlorine

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)

Covering iron with zinc is called ______________, and the zinc stops the iron from rusting.

galvanisation

What is the chemical name given to rust?

hydrated iron(III) oxide

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

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

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

magnesium + steam →

magnesium oxide + hydrogen (magnesium very slowly with cold water)

Select the least reactive metal:A)magnesium B)sodium C)potassium D)zinc

D)zinc

What is an alloy?

A mixture of a metal with one or more other elements.

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 are the products formed from the reaction between sodium and cold water?

sodium hydroxide and hydrogen

Zinc granules give hydrogen gas when treated with dilute solution of:A)FeO B)HCl C)NaCl D)Ammonia

B) HCl

Which metal is in liquid state at room temperature?

Mercury

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