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End-of-topic quiz
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Perguntas do quiz (20)
1What is the relative mass of an electron?
- A1/200
- B1/2000
- C1/20
- D1
2A negative charge means that there's more protons than electrons
- AVerdadeiro
- BFalso
3What did Bohr discover?
- AProtons
- BElectrons
- CNeutrons
- DIons
- EShells
- FNoble gases are inert
- GPlum pudding model
- HAtoms are solid spheres
- IThe nucleus is positively charged
4Relative isotopic mass is the average mass of a molecule compared to 1/12 of the mass of an atom of carbon-12
- AVerdadeiro
- BFalso
5What is the equation linking moles, mass and molar mass?
- AMoles = molar mass / mass
- BMolar mass = moles / mass
- CMoles = mass / molar mass
6If [blank_start]temperature[blank_end] and pressure stay the same, one mole of any gas always has the same [blank_start]volume[blank_end] - this is known as the molar gas volume ([blank_start]dm³mol⁻¹[blank_end]).
- Aconcentration
- Btemperature
- Cvolume
- Dmass
- Epartial pressure
- Fmoldm⁻³
- Gdm³mol⁻¹
- Hgdm⁻³
7Acids are proton acceptors
- AVerdadeiro
- BFalso
8H⁺ ions can never exist by themselves in water
- AVerdadeiro
- BFalso
9What are the products of a reaction between acids and bases?
- ASalt and water
- BSalt and hydrogen
- CSalt, carbon dioxide and water
- DSalt
10What are the products of acids and metal hydroxides?
- ASalt and hydrogen
- BSalt and water
- CSalt, carbon dioxide and water
- DSalt and metal oxides
11The water in a lattice is called [blank_start]water of crystallisation[blank_end]. A solid salt containing water of crystallisation is [blank_start]hydrated[blank_end]. A salt is [blank_start]anhydrous[blank_end] if it doesn't contain water of crystallisation.
- Awater of crystallisation
- Bhydrated
- Canhydrous
12In the presence of an acid, what colour does methyl orange turn?
- ARed
- BYellow
- CPink
- DOrange
- EColourless
13In the presence of an alkali, what colour does phenolphthalein turn?
- ARed
- BYellow
- CPink
- DOrange
- EColourless
14Compared to a monoprotic acid, you'll need to double the number of moles of base to neutralise a diprotic acid
- AVerdadeiro
- BFalso
15The actual mass/yield will always be [blank_start]less[blank_end] than the theoretical yield as not all chemicals [blank_start]react[blank_end] fully and some chemicals are [blank_start]lost[blank_end] between transfers
- Aless
- Breact
- Clost
16In a substitution reaction, the atom economy is always less than 100%
- AVerdadeiro
- BFalso
17What are the CORRECT rules for oxidation numbers?
- AUncombined elements (or elements bonded to identical atoms) have an oxidation number of 0
- BOxygen always has an oxidation number of -2
- CHydrogen always has an oxidation number of +1, except in metal hybrids where it's -1 and molecular hydrogen where it's 0
- DThe sum of the oxidation numbers for a neutral compound is 0
- EFor molecular ions, each of the constituent atoms has the same oxidation number of as the molecule's overall charge
18Oxidation is a gain in electrons
- AVerdadeiro
- BFalso
19In the reaction below, which elements have been oxidised and which have been reduced:
2K + H₂SO₄ --> K₂SO₄ + H₂- AK has been oxidised, H has been reduced
- BH has been oxidised, K has been reduced
- CS has been oxidised, K has been reduced
- DK has been oxidised, S has been reduced
20What is the chemical formula of sulphate (VI) ions?
- ASO₃²⁻
- BSO₄²⁻
- CSO₃⁻
- DSO₄⁻
Informações
- Descrição
- O usuário eliminou as informações de disciplina Quiz sobre End-of-topic quiz, criado por Usuário eliminado em 12-03-2018.
- Autor
- Usuário eliminado
- Idioma
- English
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- 10
- Histórico
- Criado em 12 mar 2018 · atualizado em 4 dez 2019
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