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Factors Affect Reaction Rate

KHAIRUN NISA
9
Masalah tambahan (10/ 20)
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masalah 1

pilihan

1. Which of the following will increase the rate of reaction?

  • Decreasing the temperature
  • Decreasing the concentration of reactants
  • Increasing the surface area of a solid reactant
  • Using a smaller volume of gas
1. Which of the following will increase the rate of reaction?

masalah 2

pilihan

Why does increasing temperature increase the rate of a chemical reaction?

  • It increases the frequency of collisions and their energy
  • It increases the volume of the reactants
  • It lowers the activation energy of the reaction
  • It reduces the energy of the particles

masalah 3

pilihan

Which change would NOT affect the rate of reaction between magnesium and hydrochloric acid?

  • Changing the concentration of the acid
  • Using powdered magnesium instead of strips
  • Increasing the temperature
  • Using a different solvent instead of water
Which change would NOT affect the rate of reaction between magnesium and hydrochloric acid?

masalah 4

pilihan

How does a catalyst affect a chemical reaction?

  • It is consumed during the reaction.
  • It provides an alternative reaction pathway with lower activation energy
  • It increases the activation energy
  • It changes the products of the reaction.

masalah 5

pilihan

In an experiment, a student increased the concentration of hydrochloric acid. What is the expected result?

  • The rate of reaction increases
  • The rate of reaction decreases
  • The total amount of product decreases
  • The product changes

masalah 6

pilihan

Which of the following has the largest surface area for the same mass?

  • A large block of solid
  • A sheet of solid
  • A powdered form of the solid
  • A single crystal

masalah 7

pilihan

Which factor increases the number of effective collisions between reacting particles?

  • Decreasing the temperature
  • Increasing temperature
  • Using a smaller beaker
  • Removing the catalyst

masalah 8

pilihan

What is the function of a catalyst in a reaction?

  • To increase the rate of reaction without being used up
  • To increase the equilibrium constant
  • To change the enthalpy of the reaction
  • To increase the activation energy

masalah 9

pilihan

Which of the following methods will slow down the rate of a chemical reaction?

  • Increasing the concentration of the reactants
  • Increasing the temperature
  • Adding a catalyst
  • Decreasing the surface area of the solid reactant

masalah 10

pilihan

A reaction occurs faster when a catalyst is added because:

  • More particles have enough energy to react
  • Activation energy is increased
  • Reactant bonds are made faster
  • Particles collide more randomly
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