If nickel reacted with sulfuric acid, the products of the reaction would be...

hydrogen gas and nickel sulfate

A metal which reacts readily and vigorously with oxygen, water and dilute acids would probably:

Have a very low 1st ionisation energy

Lower Ea by increasing reactant collisions

formed when organic matter is under high heat and pressure

solutions of silver nitrate and potassium chloride are mixed together, you would observe...

A precipitate of Silver chloride

An exothermic reaction is...

A reaction that releases energy

The rate of reaction cannot be increased by...

Increasing the volume of the reaction vessel

The correct order of activity, from least active to most active, of metals is

Potassium > magnesium > zinc > copper

Thermal pollution results in the death of aquatic organisms, how?

Less oxygen is dissolved in warmer water

How would you accurately make up a 250mL solution to a specific concentration?

Measuring 250mL in a volumetric flask

Allotropes of carbon are

made up of carbon only with different atomic arrangements

During a chemical reaction, some chemical bonds are broken and some are formed...

Energy is absorbed when making bonds

The metals used by humans have changed through history because of the...

Availability of energy to extract metal from ores

The correct ionic equation for the dissolving of solid aluminium chloride is

AlCl3 (s) --> Al3+(aq) + 3Cl-(aq)

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Duplicate of Prelim Chem

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Questions 24

Answers

1
Which of the following groups of the periodic table contain the least active metals?
Group VIII
Group IV
Group III
Group I
2
If nickel reacted with sulfuric acid, the products of the reaction would be...
hydrogen gas and nickel sulfate
nickel sulfide and hydrogen gas
carbon dioxide gas and nickel sulfate
Sulfur dioxide gas and nickel hydroxide
3
A metal which reacts readily and vigorously with oxygen, water and dilute acids would probably:
Have a high value for 1st ionisation energy
Be from the "transition" block of the periodic table
Be located at the extreme right of the periodic table
Have a very low 1st ionisation energy
4
What do metals, coal and oil have in common?
They are fossil fuels
They are non-renewable
They are pure substances
They can be recycled
5
Water is often called the "universal solvent". What substance is soluble in water?
polyethylene
Sodium chloride
Silicon dioxide
Ethane
6
Catalysts can:
Lower Ea by increasing reactant collisions
Speed reactions up by increasing Ea
Cause different products to form
Decrease the ΔH by providing alternative pathways
7
Fossil fuels are...
An uncommon fuel source
formed when organic matter is under high heat and pressure
Renewable energy sources
8
solutions of silver nitrate and potassium chloride are mixed together, you would observe...
A precipitate of Silver chloride
no precipitate is formed
A precipitate of potassium silvide
A precipitate of Potassium Nitrate
9
An exothermic reaction is...
A reaction that releases energy
A reaction that must be performed outside
A reaction that absorbs energy
10
What is the true statement for the energy profile shown?
The reaction is endothermic
The reactants are more stable then the products
The reaction is exothermic
The activation energy is the energy required to make bonds
11
The rate of reaction cannot be increased by...
Adding a catalyst
Increasing the temperature
Increasing the concentration of the reactants
Increasing the volume of the reaction vessel
12
In petroleum refinery, fractional distillation separates the mixture according to...
Solubility
Density
Melting point
Boiling point
13
Which alloy is used to make musical instruments such as trumpets and trombones?
bronze
brass
solder
steel
14
Water has a high boiling point due to...
hydrogen bonding
intra-molecular bonding
dispersion forces
it's molecular weight
15
The correct order of activity, from least active to most active, of metals is
copper > zinc > magnesium > potassium
magnesium > potassium > zinc > copper
Potassium > magnesium > zinc > copper
Copper > magnesium > potassium > zinc
16
H₂O is most dense as a...
Gas
Solid
Liquid
17
Thermal pollution results in the death of aquatic organisms, how?
Dirt dissolves in warmer water, causing erosion
The warm water cooks the fish
Less oxygen is dissolved in warmer water
The increased heat speeds up plant growth
18
How would you accurately make up a 250mL solution to a specific concentration?
measuring 250mL in a measuring cylinder
Measuring 250mL in a beaker
Measuring 250mL in a volumetric flask
Measuring 250mL in a pipette
19
Allotropes of carbon are
very hard
soluble in water
made up of carbon only with different atomic arrangements
Any molecule that contains carbon
20
The largest percentage of water is found in the...
Hydrosphere
Biosphere
Atmosphere
Lithosphere
21
During a chemical reaction, some chemical bonds are broken and some are formed...
Energy is released both when making and breaking bonds
Energy is absorbed when making bonds
Energy is absorbed when bonds are made and released
Energy is absorbed when breaking bonds
22
The process of photosynthesis...
Produces sugar and carbon dioxide
Produces Sugar and oxygen
Can occur without the sun's energy
Removes oxygen from the atmosphere
23
The metals used by humans have changed through history because of the...
Discovery of new minerals as people explored the world
Invention of new alloys
Availability of energy to extract metal from ores
Development of new technologies to use the metal
24
The correct ionic equation for the dissolving of solid aluminium chloride is
AlCl3 (s) --> Al3+(aq) + 3Cl-(aq)
AlCl3 (s) --> AlCl3 (aq)
AlCl3 (s) --> 3Al3+(aq) + Cl-(aq)
AlCl3 (s) --> Al3+(aq) + Cl-(aq)

Duplicate of Prelim Chem Flashcards | StudBud