Test
OCR B A Level Chemistry Elements of Life
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Preguntas del test (30)
1Isotopes of an element have the [blank_start]same[blank_end] atomic number but [blank_start]different[blank_end] mass numbers
- Asame
- Bdifferent
2The relative mass is the [blank_start]average[blank_end] mass of an element compared to an atom of C-12.
- Aaverage
3A mass spectrometer measures:
- AMoles
- BRelative masses
- CShapes of molecules
4Work out the number of moles in 5.10g of Aluminium oxide.
- A0.0500 moles
- B5 moles
- C0.5 moles
5Percentage yeild =
- Atheoretical yeild/actual yield x 100
- Bactual yield/theoritical yield x 100
- Ctheoretical yield/actual yeild / 100
6Compounds that have water molecules incorporated into them are called water of crystalisation.
- AVerdadero
- BFalso
7Methyl orange indicators turn from [blank_start]yellow[blank_end] to [blank_start]red[blank_end] when you add acid to an alkali.
- Ayellow
- Bred
8Phenolphthalein turns from [blank_start]red[blank_end] to [blank_start]colourless[blank_end] when you add acid to an alkali.
- Ared
- Bcolourless
9Shells further away from the nucleus have a lower energy level than the ones closer to it.
- AVerdadero
- BFalso
10Orbitals can contain up to [blank_start]2[blank_end] electrons.
- A2
- B1
- C4
- D3
11Which type of orbital is this?
- AS orbital
- BP orbital
- CD orbital
12What type of orbital is this?
- AS orbital
- BP orbital
- CD orbital
13Electrons fill up the lowest energy sub-shells first.
- AVerdadero
- BFalso
14How many electrons does a full p sub-shell contain
- A2
- B6
- C3
- D10
15Ionic compounds [blank_start]conduct[blank_end] electricity when they are [blank_start]molten[blank_end] or dissolved because the ions are [blank_start]free to move[blank_end].
- Aconduct
- Bmolten
- Cfree to move
- Dcan't conduct
- Eliquid
- Fsolid
- Gstationary
- Hstuck to each other
16Ionic compounds are often [blank_start]soluble[blank_end] in water.
- Asoluble
17In a covalent bond, the positive nuclei are attracted [blank_start]electrostatically[blank_end] to the shared electrons.
- Aelectrostatically
- Bionically
- Cintramolecularly
18Dative covalent bonds are when both electrons come from the same atom.
- AVerdadero
- BFalso
19Giant covalent structures can conduct electricity.
- AVerdadero
- BFalso
20[blank_start]Silicon dioxide[blank_end] is an example of a giant covalent structure.
- ASilicon dioxide
- BSodium chloride
- CMagnesium
21Metalic structures contain [blank_start]delocalised[blank_end] electrons.
- Adelocalised
- Bno
- Clocalised
22What is the bond angle on a molecule containing 2 groups of paired electrons around a central atom?
- A180
- B109.5
- C107
- D120
23What is the bond angle on a molecule that contains 3 groups of paired electrons and 1 group of unpaired electrons?
- A107
- B104.5
- C109.5
- D120
24First ionisation enthalpy [blank_start]decreases[blank_end] down the group.
- Adecreases
- Bincreases
- Cstays the same
25First ionisation enthalpy [blank_start]increases[blank_end] across a period.
- Aincreases
- Bdecreases
- Cstays the same
26Group 2 oxides and hydroxides are [blank_start]bases[blank_end].
- Abases
- Bacidic
- Cneutral
27The colour of the flame test for Sodium is:
- Aorange-yellow
- Bcrimson
- Cbrick red
- Dgreen
28To test for sulphates you add HCl and [blank_start]Barium chloride[blank_end] and it turns white.
- ABarium chloride
29Emission spectra contain black lines on a coloured background.
- AVerdadero
- BFalso
30Electrons [blank_start]release[blank_end] energy as they [blank_start]drop[blank_end] from a higher energy level to a lower one.
- Arelease
- Bdrop
- Ctake in
- Djump
Información
- Descripción
- A-Level Chemistry Test sobre OCR B A Level Chemistry Elements of Life, creado por Alex Lyes el 23/05/2016.
- Autor
- Alex Lyes
- Idioma
- English
- Visitas
- 941
- Etiquetas
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