Quiz
GCSE AQA Chemistry 2
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Perguntas do quiz (32)
1The mass number tells you the total number of protons and neutrons. Electron aren't counted in this number because their relative atomic mass is [blank_start]negligible[blank_end].
- Anegligible
- Bextremely large
- Cnegative
2Which of these 2 statements describes a compound?
- ACompounds are two or more elements chemically bonded together
- BCompounds are two or more elements which are not chemically bonded together
3Isotopes are different atomic forms of the same element which have the same number of neutrons but a different number of protons.
- AVerdadeiro
- BFalso
4In ionic bonding, atoms lose or gain electrons to form charge particles (ions). Atoms from groups 1 and 2 are more likely to [blank_start]lose[blank_end] electrons.
- Alose
- Bgain
5Which of the following statements are true about ionic compounds?
- AThey have giant ionic lattices
- BThere are very strong electrostatic forces of attraction between oppositely charged ions
- CThey have high melting and boiling points
- DThey dissolve easily in water
- EThey have small ionic lattices
- FThere are very weak electrostatic forces of attraction between oppositely charged ions
- GThey have low melting and boiling points
- HThey don't dissolve easily in water
6Covalent bonding involves sharing electrons to obtain full outer shells. These are strong bonds.
- AVerdadeiro
- BFalso
7Which of these are features of simple molecular substances?
- AThey have weak intermolecular forces
- BThey have low melting and boiling points
- CThey don't conduct electricity
- DThey have strong intermolecular forces
- EThy have high melting and boiling points
- FThey conduct electricity
8Graphite is the only non-metal which is a good conductor of heat and electricity. This is because each carbon atom has one [blank_start]delocalised electron[blank_end].
- Adelocalised electron
9Metals can be bent or shaped as the delocalised electrons allow the layers of atoms to slide over each other.
- AVerdadeiro
- BFalso
10What size are nanoparticles?
- A1-100 nm across
- B100-1000 nm across
- C0-1 nm across
11Many new uses of nanoparticles are being developed: which of these can they be used for?
- ACatalysts
- BSun cream and deodorants
- CNanomedicine
- DLubricant coatings
- EElectrical circuits
- FHand warmers
- GPlastic bags
- HMaking alloys
12Thermosetting polymers have [blank_start]crosslinks[blank_end] which hold the chains together in a solid structure.
- Acrosslinks
13How do you work out number of moles?
- Amass/relative formula mass
- Brelative formula mass/mass
- Crelative formula mass * mass
14Yields are always less than 100%, this may be because:
- Athe reaction is reversible
- Bwhen you filter a liquid to remove solid particles, you usually lose some of the liquid/solid
- Cunexpected reactions happen
- Dthere are no reactants
- Eyou don't do the experiment in industrial conditions
15Name two ways of identifying substances.
- APaper Chromatography
- BGas Chromatography
- CSolid Chromatography
- DColour Chromatography
16The rate of a reaction depends on four things: temperature, [blank_start]concentration[blank_end], catalyst and surface area.
- Aconcentration
17Which of these methods of measuring the rate of a reaction is the most accurate?
- APrecipitation: observing a mark through the solution and measuring how long it takes for the mark to disappear
- BChange in mass: carry experiment out on a mass balance and observe how mass disappears (as gas is released)
- CVolume of gas given off: Use a gas syringe to measure volume of gas given off
18The reaction between HCl acid and marble chips can be sped up by using finer particles of solid as it has a [blank_start]larger[blank_end] surface area.
- Alarger
- Bsmaller
19Higher temperature increases the number and energy of collisions which means it takes more time for the particles to have enough energy to start the reaction.
- AVerdadeiro
- BFalso
20A [blank_start]catalyst[blank_end] is a substance which speeds up a reaction without being changed or used up in the reaction.
- Acatalyst
21Which of these are disadvantages of catalysts?
- AVery expensive to buy
- BDifferent reactions require different catalysts
- CCatalysts can be poisoned by impurities
- DThey are harmful to people
- EThey are very rare
22Which of these are examples of exothermic reactions?
- ACombustion
- BNeutralisation reactions
- CRespiration
- DSports injury packs
- EPhotosynthesis
23An alkali is a [blank_start]base[blank_end] that dissolves in water.
- Abase
24Acid + Metal ------> Salt + Oxygen
- AVerdadeiro
- BFalso
25Ammonia + Nitric acid -------> [blank_start]Ammonium nitrate[blank_end]
- AAmmonium nitrate
26Which of these are methods of making soluble salts?
- AUsing a metal/insoluble base
- BUsing an alkali
- CPrecipitation reactions
27An electrolyte contains free [blank_start]ions[blank_end] which conduct electricity.
- Aions
- Belectrons
- Catoms
28Oxidation is loss of electrons and reduction is gaining electrons.
- AVerdadeiro
- BFalso
29In electrolysis, at the [blank_start]negative[blank_end] electrode, if metal and H+ ions are present, the metal ions will stay in solution is the metal is [blank_start]more[blank_end] reactive than hydrogen.
- Amore
- Bless
- Cnegative
- Dpostive
30Uses of chlorine:
- ABleach
- BPlastics
- CPlating metals
31Cryolite is used to [blank_start]lower[blank_end] the temperature needed to melt aluminium oxide.
- Alower
32In electroplating, you put the thing you want to plate at the positive electrode.
- AVerdadeiro
- BFalso
Informações
- Descrição
- GCSE Chemistry (Chemistry 2) Quiz sobre GCSE AQA Chemistry 2, criado por Lilac Potato em 29-11-2015.
- Autor
- Lilac Potato
- Idioma
- English
- Visualizações
- 39
- Etiquetas
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