4278416
Descrição
Quiz por Neil Patil, atualizado more than 1 year ago
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Criado por Neil Patil
mais de 8 anos atrás
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Questão 1
Questão
What does le Chatelier's principle state?
Responda
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When a system in equilibrium is subjected to an external change, the system will readjust itself to minimise the effect of the change.
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When a system in equilibrium is subjected to an external change, the system will readjust itself to maximise the effect of the change.
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When a system in equilibrium is subjected to an internal change, the system will readjust itself to minimise the effect of the change.
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When a system in equilibrium is subjected to an internal change, the system will readjust itself to maximise the effect of the change.
Questão 2
Questão
Which of these affect the position of equilibrium?
Responda
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Changing the temperature.
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Changing the pressure.
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Adding a catalyst.
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Removing product.
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Removing reactant.
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Changing the concentration
Questão 3
Questão
In the Haber process, increasing the [blank_start]pressure[blank_end] will shift the equilibrium to the [blank_start]right[blank_end], because there are [blank_start]fewer[blank_end] moles of ammonia than moles of the [blank_start]reactants[blank_end]. However, this is expensive, so it is not economical to keep it high.
Responda
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pressure
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temperature
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right
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left
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fewer
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more
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reactants
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products
Questão 4
Questão
Symmetrical molecules are always polar.
Responda
- True
- False
Questão 5
Questão
Which of the following intermolecular forces occur between molecules of HCl?
Responda
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London forces
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Permanent dipole-dipole interactions
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Hydrogen bonds
Questão 6
Questão
Place the group 2 elements in order of ascending melting point: Si > [blank_start]Al[blank_end] > Mg > [blank_start]Na[blank_end] > [blank_start]S[blank_end] > [blank_start]P[blank_end] > [blank_start]Cl[blank_end] > Ar
Responda
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Al
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Na
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S
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P
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Cl
Questão 7
Questão
Giant metallic structures have higher melting points than giant covalent structures.
Responda
- True
- False
Questão 8
Questão
All sub shells in the 3rd shell are filled before the 4s sub shell starts to fill.
Responda
- True
- False
Questão 9
Questão
The molecule platinum hexafluoride (PtF6) has an octahedral shape.
Responda
- True
- False
Questão 10
Questão
Iron has the electron formation: 1s2 2s2 2p6 3s2...
Responda
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...3p6 3d8
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...3p6 3d6 4s2
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...3p6 3d8 4s2
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...3p6 4s8
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