APDL Eductation Resources/APDL Eductation Resources.iso/programs/games/quiz/mc_chem/Chem_2/Mixture10

Text File | 1994-09-03 | 3.6 KB | 149 lines

@Approximately how much iron is present in stainless steel?
74%
10%
<1%

@The block of elements found roughly in the middle of the periodic table are called:
The transition elements
Metals
Non-metals

@In which of the following pairs can both metals be obtained by passing carbon monoxide over the hot metal oxide?
Lead and copper
Aluminium and iron
Copper and magnesium

@Which one of the following is a property of graphite?
Conducts electricity
Fairly hard substance
Transparent

@Which of the following is a chemical symbol for a halogen?
I
He
Na

@The diagram shows an experiment set up to test the diffusion of hydrogen. If the apparatus is left for some time:
#diff2
The level in tube x goes down and the level in tube y up
The two levels in x and y stay the same
The level in tube y goes down and the level in x goes up

@Nitrogen from the air is needed to make ammonia. The nitrogen is obtained by
Fractional distillation of the air
Bubbling the air through water
Diffusion of the air

@Oxides which are acidic and alkaine are called:
Amphoteric
Allotropes
Isotopes

@Sulphur burns in air to form:
Sulphur dioxide
Sulphur monoxide
Sulphur trioxide

@This substance is:
#prop
Propane
Butane
Triane

@Transition elements are:
Not in a group
In group II
In group III

@In an expeiment it was found that four 1g lumps reacted faster than a single 4g lump. This was because:
#area
The surface area with the four 1g lumps was larger
The 1g lumps were more free to move around
Four 1g lumps are more concentrated than a single 4g lump

@Which one of the following changes is oxidation?
CuÛO ï CuO
NÛ ï NHÜ
FeClÜ ï FeClÛ

@Salt can be used to preserve food because:
it has a drying effect
its helps useful bacteria grow
it causes a chemical reaction, producing heat

@Damage to the metal parts of buildings is caused by:
Sulphur dioxide
Carbon dioxide
Lead emissions from cars

@If you were asked to measure 21.7 cmÏ of liquid as accurately as posible, which one would you use?
50cmÏ burette
100cmÏ beaker
25cmÏ pipette

@What is dissociation?
Changing straight from a solid to a vapour
Producing ions
Having two distinct melting points

@What is the relative molecular mass of iron II sulphide?
88
56
32

@Which is in the correct order of decreasing pH?
Sodium hydroxide, sea water and fruit juice
Sea water, sodium hydroxide and fruit juice
Fruit juice, sea water and sodium hydroxide

@A Hoffmann voltameter is connected as shown with acidified water in the tubes. The gas Y is:
#hoff
Hydrogen
Oxygen
Sulphur dioxide

@HCl(aq) + NaOH(aq) ï NaCl(aq) + HÛO(l) The reaction also produces heat energy. This kind of reaction is called:
An exothermic reaction
A endothermic reaction
An equilibrium reaction

@An element that forms crystals composed of small molecules is:
Iodine
Diamond
Magnesium

@From the following list, which three substances are all compounds: Air, water, hydrogen, silver nitrate, tin & brass.
Water, brass and silver nitrate
Air, silver nitrate and hydrogen
Tin, brass and silver nitrate

@Isotopes have:
The same number of protons, but different numbers of neutrons
One more electron in the neutral atom than protons
Different numbers of protons and electrons in the neutral atom

@A substance not used in the production of iron is:
Sulphur
Hot air
Coke

@The metal used in kitchen foil and chocolate bar wrappers is:
Aluminium
Steel
Tin

@What would happen if zinc metal was added to magnesium chloride solution?
Nothing
Magnesium would be deposited
Hydrogen gas would be produced

@Carbon is a reducing agent. If heated with metal oxides then:
Metal is produced
Metal carbonates are formed
No reaction takes place

@The substance used to kill bacteria in tap water is:
Chlorine
Ammonia
Bromine