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6. If an oxidation state decreases, the compound is...
- reduced
- oxidised
- neutralised
7. What are the conditions of Homolytic fission?
- presence of UV radiation only
- high temperatures and any state
- gas phase with high temperatures only
- either gas phase with high temperatures OR presence of UV radiation
- must be in the stratosphere
8. The first ionisation enthalpy increases across a period and decreases down a group
9. What is the fourth ionisation enthalpy?
- X(g) --> 4X+(g) + e-
- X3+(g) --> X4+(g) + e-
- X(g) --> X4+(g) + e-
- X4+(g) --> X4+(g) + e-
10. Define electronegativity
- How good an atom is at gaining/losing electrons
- The degree to which an atom of an element repels electrons
- The degree to which an atom of an element attracts electrons
- The degree to which an atom of an element gets rid of its electrons
11. The intermolecular bonds for halogens are...
- covalent
- polar
- instantaneous dipole-induced dipole bonds
- permanent dipole-permanent dipole bonds
12. What is the lattice structure of sodium chloride said to be?
- simple cubic
- giant ionic
- ionic lattice
- electrostatic bonds
13. In ions, the sum of the oxidation states is equal to...
- it varies depending on temperature
- the charge on the ion
- 0
14. Variable costs depend on...
- The amount of product manufactured.
- The recycling of unreacted feedstock.
- The amount of profit a chemical company makes.
- The efficiency of a chemical process.
15. What are raw materials?
- The reactants fed in at the start of a process.
- The materials that feedstocks are prepared from.
- Obtained through methods such as fractional distillation.
- The materials obtained after the processing and conversion of feedstocks.
16. The boiling points increase with a heavier halogen atom, since the overall number of electrons increases and hence do the id-id bonds.
17. How many orbitals and electrons can a d sub-shell hold?
- 3 orbitals, 6 electrons
- 5 orbitals, 10 electrons
- 10 orbitals, 5 electrons
- 2 oribitals, 2 electrons
18. Which of the following are INSOLUBLE
- AgCl
- Group 1 Elements
- All sulfates
- All chlorides
- (NH4)2CO3
19. How can you define polar molecules?
- Only molecules with instantaneous dipoles
- Only molecules with a permanent dipole
- All molecules with dipoles
- All molecules which have bonds
20. How are chlorine and bromine transported?
- chlorine-as a gas by air travel(in a plane). bromine-as a liquid by rail or road tanker.
- chlorine-as a gas by rail or road tanker. bromine-in lead-lined steel tanks supported in strong metal frames
- chlorine-as a liquid by rail or road tanker. bromine-in lead-lined steel tanks supported in strong metal frames
- chlorine-as a liquid by air travel(in a plane). bromine-as a liquid by rail or road tanker