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Rates of reactions

Gwyneth Cooper 8 preguntas

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Este test tiene tipos de pregunta que se abren en el reproductor de siempre.

Preguntas del test (8)

  1. 1For a chemical [blank_start]reaction[blank_end] to take place, the particles must [blank_start]collide[blank_end] with enough energy and the right orientation to break the [blank_start]bonds[blank_end] holding them together. Then the [blank_start]particles[blank_end] can rearrange themselves into new compounds.
    1. Areaction
    2. Bcollide
    3. Cbonds
    4. Dparticles
  2. 2The rate of a reaction is the...
    1. ANumber of successful collisions per second
    2. BNumber of particles that could react
    3. CSize of the container the reaction is in
    4. DNumber of collisions that take place
  3. 3Which of these increase or decrease the rate of a reaction? (click as many as are needed - there are three factors listed in total)
    1. AThe temperature of the reactants
    2. BThe weather outside
    3. CThe concentration of the reactants
    4. DThe quality of the reactants (that you bought them from a good shop)
    5. EThe particle size
    6. FThe size of the container
  4. 4Temperature is a measure of the [blank_start]heat[blank_end] energy that the particles have. The more heat energy particles have, the [blank_start]faster[blank_end] they move. This means that [blank_start]collisions[blank_end] are more likely to have enough energy to break the [blank_start]bonds[blank_end] in the reactants, so there will be more successful collisions per [blank_start]second[blank_end].
    1. Aheat
    2. Bfaster
    3. Ccollisions
    4. Dbonds
    5. Esecond
  5. 5What is concentration?
    1. AIt's the size of the container the reaction is in
    2. BIt's the number of particles in a given volume or space
    3. CIt's the number of collisions per second
  6. 6[blank_start]Increasing[blank_end] the concentration increases the rate of the [blank_start]reaction[blank_end]. Because there are more [blank_start]particles[blank_end] in the same space, there will be more [blank_start]successful[blank_end] collisions just because they're crowded together more. Because there are more collisions, the [blank_start]rate[blank_end] of the reaction will be faster.
    1. AIncreasing
    2. Breaction
    3. Cparticles
    4. Dsuccessful
    5. Erate
  7. 7Which of these will react at the fastest rate?
    1. AVinegar and baking soda chunks
    2. BVinegar and a baking soda tablet
    3. CVinegar and baking soda powder
    4. DVinegar and a baking powder (baking soda mixed with citric acid) tablet
  8. 8Decreasing the particle size [blank_start]increases[blank_end] the rate of the reaction. [blank_start]Large[blank_end] chunks have a small surface area so react only slowly, because only those particles on the outside are available for [blank_start]collisions[blank_end]. Smaller pieces and powder have a [blank_start]larger[blank_end] surface area (for the same amount of reactant), and so more particles are available for collisions. Because more particles are available, there will be more [blank_start]successful[blank_end] collisions per second and therefore the rate of the [blank_start]reaction[blank_end] will increase.
    1. Aincreases
    2. BLarge, big, bigger, larger
    3. Ccollisions
    4. Dlarger, bigger
    5. Esuccessful
    6. Freaction

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Descripción
Year 10 Science quiz about rates of reactions with a combustion focus
Idioma
English
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