Quiz
Chemistry f321 quiz
Perguntas do quiz (34)
1What did John Dalton NOT predict about the atom?
- AAtoms are tiny particles that make up elements
- BAtoms cannot be divided
- CAtoms have negative electrons which move around in a 'sea' of electrons
- DAll atoms of a given element are the same
2What is J J Thomson most famous for?
- AWorking out the number of atoms in a mole
- BDiscovering that cathode rays are made up of a stream of particles called electrons
- CFinding a law allowing people to indirectly determine the enthalpy change of a reaction
- DShooting JFK
3Who carried out the gold leaf experiment, in which alpha particles were fired at a thin sheet of gold foil?
- ADalton
- BHess
- CRutherford
- DBohr
4Which of these are Rutherford's main conclusions from his experiment into the structure of the atom?
- AThe positive charge and most of the mass of the atom are concentrated at the centre, in the nucleus
Negative electrons orbit the nucleus
Electrons follow only certain paths
Most of the atom is made up of empty space - BThe atom is made up of negative electrons in a 'sea' of positive charge
- CAtoms cannot be divided
Atoms are tiny particles that make up elements - DThe overall charge of an atom is 0
electrons orbit the nucleus
Most of the atom is empty space
The positive charge and most of the mass of an atom is centred in the middle, in the nucleus
- AThe positive charge and most of the mass of the atom are concentrated at the centre, in the nucleus
5what is the relative mass of an electron?
- A1
- B2000
- C1/2000
- D1/20 000
6what is the definition of an isotope?
- Aatoms of the same element with different numbers of neutrons
- Batoms of the same elements with different numbers of protons
- Catoms with different mass numbers
- Datoms with the same charges
7How many atoms are in one mole?
- A6.02 x 10 to the power of 24
- B2.06 x 10 to the power of 13
- C6.02 x 10 to the power of 23
- D6.03 x 10 to the power of 24
8what is the definition of relative isotopic mass?
- Athe weighted mean mass of an atom compared to one-twelfth the mass of an atom of carbon-12
- Bthe weighted mean mass of an atom compared to twelve grams of carbon-12
- Cthe mass of an isotope of an element compared to twelve grams of carbon -12
- Dthe mass of an isotope of an element compare to one -twelfth the mass of one atom of carbon-12
9what is the definition of relative atomic mass?
- Athe weighted mean mass of an atom of an element compared to one-twelfth the mass of an atom of carbon-12
- Bthe weighted mean mass of an atom compared to 12 grams of carbon-12
- Cthe mass of an atom compared to one -twelfth the mass of an atom of carbon-12
- Dthe mass of an isotope of an element compared to one -twelfth the mass of one atom of carbon 12
10what is the definition of a mole?
- Athe amount of any substance containing as many particles as there are carbon atoms in exactly 12 grams of the crabon-12 isotope
- Bthe mass of 6.02 x 10 to the power of 23 atoms
- Ca small mammal adapted to a subterranean lifestyle
- Dthe number of atoms per mole in a compound
11how do you find the number of moles in a substance?
- Amr divided by the mass
- Bmass divided by the mr
- Cmass times the mr
- Dmr squared minus the mass
12what do you need to do to find the empirical formula?
- Alist the elements, the mr, then divide by the smallest
- Blist the elements, the experimental masses, number of moles, divide mass by moles, divide by smallest
- Clist the elements, the experimental masses, mr, divide mass by mr, divide by smallest
- Dlist all the elements, experimental masses, mr, divide by smallest
13what does Avogadro's hypothesis state?
- Athere are 6.02 times 10 to the power of 23 molecules in a mole
- Bthe mr is calculated by adding the ar of all the elements present in the compound
- Cthe volume of gas stays the same regardless of RTP
- Dequal volumes of gases at the same temperature and pressure contain equal numbers of molecules
14what is the formula for calculating the number of moles present in a gas at RTP?
- Avolume (dm cubed) divided by 24.0
- Bvolume (cm cubed) divided by 24.0
- CVolume (dm cubed) divided by 23.0
- Dvolume times mr divided by 24.0
15what is the formula for calculating the number of moles in a liquid?
- Avolume (cm cubed) times concentration
- Bvolume (dm cubed) divided by concentration
- Cvolume (dm cubed) times concentration
- Dvolume (dm cubed) times mr
16What is the definition of an acid?
- AA substance with a pH of less than 7
- BA substance the neutralises an alkali
- CA proton donator
- DA dehydrated salt
17What is the definition of an alkali?
- AA soluble base
- BA base that dissolves in water to release OH minus ions
- CA substance that is above pH 7
- DThe opposite to an acid
18What is the definition of a base?
- AA proton acceptor
- BA soluble alkali
- CA substance that is pH7
- DA substance that is above pH 7
19What is the formula of nitric acid?
- ANH2
- BHN03
- CH2NO3
- DNaCl
20What is the definition of a salt?
- AFormed when an acid and an alkali neutralise each other
- BFormed when the H+ ion in an acid is replaced by a metal ion or other positive ion
- CA popular seasoning
- DA mildly acidic substance (pH5-6) that is formed in the presence of an acid catalyst
21Acid + carbonate --> ??
- ASalt + hydrogen + water
- BSalt + hydrogen + carbon dioxide
- CSalt + hydrogen
- DSalt + carbon dioxide + water
22Acid + base --> ??
- ASalt + hydrogen
- BSalt + water
- CSalt + oxygen + water
- DSalt + carbon dioxide + water
23Acid + alkali --> ??
- ASalt + water
- BSalt + hydrogen + metal oxide
- CMetal oxide + hydrogen
- DSalt + oxygen + water
24What is the definition of... a) hydrated and b) anhydrous
- Aa) a crystalline compound containing water molecules, b) and crystalline compound containing no water molecules
- Ba) an aqueous solution, b) a liquid solution
- Ca) a crystalline compound containing water molecules, b) a substance that contains no water molecules
- Da) a crystalline structure, b) a simple covalent structure
25What does water of crystallisation refer to?
- Athe water molecules that form an essential part of the crystalline structure of a substance
- Bthe water needed in order to hydrate a substance
- Cwater molecules that are able to form a crystalline structure under extreme conditions
- Dthe crystalline structure of non-metals
26What is the oxidation number of an uncombined event?
- A1
- B0
- C-1
- D+2
27What is the oxidation number of combined fluorine?
- A+1
- B0
- C-1
- D+3
28What is the oxidation number of combined oxygen?
- A-2
- B+2
- C+3
- D-1
29What is the oxidation number of combined hydrogen?
- A-1
- B0
- C-2
- D+1
30What is it called when electrons are lost from an element in a reaction?
- AReduction
- BReductation
- COxidation
- DMinimisim
31What is it called when electrons are gained by an atom in a reaction?
- AOxidation
- BReduction
- CInheritance
- DMaximism
32What is a reducing agent?
- Aa reagent that oxidises another species
- Ba reagent that is reduced in a reaction
- Ca reagent that reduces another species
- Dan atom that has been reduced
33What is a redox reaction?
- AA reaction where the same element is both reduced and oxidised
- BA reaction which is both endo- and exothermic
- CA reaction that has a total enthalpy change of 0
- DA reaction in which both reduction and oxidation take place
34What is an oxidising agent?
- Aa reagent that oxidises another species
- Ba species that has been oxidised
- Ca reagent that accelerates the rate of reduction
- Da reagent that release energy when exposed to oxygen
Informações
- Descrição
- AS - Level Chemistry Quiz sobre Chemistry f321 quiz, criado por rosieoj2 em 26-02-2015.
- Autor
- rosieoj2
- Idioma
- English
- Visualizações
- 83
- Etiquetas
- Avaliação
- 1,0 de 5 · 1 avaliação Avalie este quiz