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A-Levels chemistry Quiz sobre Definitions, criado por munchkinjofan em 26-05-2013.

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Definitions

Questão 1 de 8

1

Define standard enthalpy change of combustion

Selecione uma das seguintes:

  • The enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard conditions, all reactants and products being in their standard conditions

  • The enthalpy change that takes place when one mole of a compound in its standard state is formed from its constituent elements in their standard states under standard conditions

  • The enthalpy change that accompanies a reaction in the molar quantities expressed in a chemical equation under standard conditions, all reactants and products being in their standard states

Explicação

Questão 2 de 8

1

Define the standard enthalpy change of formation

Selecione uma das seguintes:

  • The enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard conditions, all reactants and products being in their standard conditions

  • The enthalpy change that takes place when one mole of a compound in its standard state is formed from its constituent elements in their standard states under standard conditions

  • The enthalpy change that accompanies a reaction in the molar quantities expressed in a chemical equation under standard conditions, all reactants and products being in their standard states

Explicação

Questão 3 de 8

1

Define the standard enthalpy change of reaction

Selecione uma das seguintes:

  • The enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard conditions, all reactants and products being in their standard conditions

  • The enthalpy change that takes place when one mole of a compound in its standard state is formed from its constituent elements in their standard states under standard conditions

  • The enthalpy change that accompanies a reaction in the molar quantities expressed in a chemical equation under standard conditions, all reactants and products being in their standard states

Explicação

Questão 4 de 8

1

Define "addition reaction"

Selecione uma das seguintes:

  • A reaction in which a reactant is added to an unsaturated molecule to make a saturated molecule

  • A reaction in which a more reactive element displaces a less reactive element from an aqueous solution of the latter's ions.

  • The removal of a molecule from a saturated molecule to make an unsaturated molecule

  • The formation of a solid from a solution during a chemical reaction. Precipitates are often formed when two aqueous solutions are mixed together

  • A reaction in which an atom or group of atoms is replaced with a different atom, or group of atoms

Explicação

Questão 5 de 8

1

Define "displacement reaction"

Selecione uma das seguintes:

  • A reaction in which a reactant is added to an unsaturated molecule to make a saturated molecule

  • A reaction in which a more reactive element displaces a less reactive element from an aqueous solution of the latter's ions.

  • The removal of a molecule from a saturated molecule to make an unsaturated molecule

  • The formation of a solid from a solution during a chemical reaction. Precipitates are often formed when two aqueous solutions are mixed together

  • A reaction in which an atom or group of atoms is replaced with a different atom, or group of atoms

Explicação

Questão 6 de 8

1

Define "elimination reaction"

Selecione uma das seguintes:

  • A reaction in which a reactant is added to an unsaturated molecule to make a saturated molecule

  • A reaction in which a more reactive element displaces a less reactive element from an aqueous solution of the latter's ions.

  • The removal of a molecule from a saturated molecule to make an unsaturated molecule

  • The formation of a solid from a solution during a chemical reaction. Precipitates are often formed when two aqueous solutions are mixed together

  • A reaction in which an atom or group of atoms is replaced with a different atom, or group of atoms

Explicação

Questão 7 de 8

1

Define "precipitation reaction"

Selecione uma das seguintes:

  • A reaction in which a reactant is added to an unsaturated molecule to make a saturated molecule

  • A reaction in which a more reactive element displaces a less reactive element from an aqueous solution of the latter's ions.

  • The removal of a molecule from a saturated molecule to make an unsaturated molecule

  • The formation of a solid from a solution during a chemical reaction. Precipitates are often formed when two aqueous solutions are mixed together

  • A reaction in which an atom or group of atoms is replaced with a different atom, or group of atoms

Explicação

Questão 8 de 8

1

Define "substitution reaction"

Selecione uma das seguintes:

  • A reaction in which a reactant is added to an unsaturated molecule to make a saturated molecule

  • A reaction in which a more reactive element displaces a less reactive element from an aqueous solution of the latter's ions.

  • The removal of a molecule from a saturated molecule to make an unsaturated molecule

  • The formation of a solid from a solution during a chemical reaction. Precipitates are often formed when two aqueous solutions are mixed together

  • A reaction in which an atom or group of atoms is replaced with a different atom, or group of atoms

Explicação