Honors Review on Redox, reaction rate and thermochem

Which of the following occurs in a redox reaction?

• Oxidation only

• Reduction only

• Both oxidation and reduction

• Neither Oxidation nor reduction

Fe + CuSO₄ → FeSO₄ + Cu, what is being oxidized in this equation?

• Iron sulfate

• Copper Sulfate

• Copper

• Iron

In equation Ca + HCl → CaCl₂ + H_{2, which statement is true?}

• Ca is being reduced

• The Cl^- is being reduced

• Ca is a spectator ion

• the H⁺ ion is being reduced

What is the oxidation number of Vanadium V in NaVO₃ ?

• -5

• +5

• -1

• +1

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A substance X can release iodine from potassium iodide. Which statement is true about X?

• It is an oxidizing agent

• It is an acid

• It is a reducing agent

• It is an element

Tags

NGSS.HS-PS1-2

Which of the following correctly defines the term reaction rate?

• rate of disappearance of products

• rate of formation of reactants

• rate of disappearance of reactants

• rate of formation of the reaction

Tags

NGSS.HS-PS1-5

Which factors increases the rate of a reaction by forcing reactant particles closer together?

• increased temperature

• increased surface area

• increased pressure

• increased concentration

Tags

NGSS.HS-PS1-5

How does an increase in concentration increase in the rate of a reaction?

• increasing the number of reactant particles

• increasing the size of the reactant particles

• increasing the kinetic energy of the particles

• lowering the activation energy of the reactants

Tags

NGSS.HS-PS1-5

What surface area and temperature of magnesium will react the fastest with hydrochloric acid?

• magnesium chips at 25 ^oC

• magnesium chips at 50 ^oC

• powdered magnesium at 25 ^oC

• powdered magnesium at 50 ^oC

Tags

NGSS.HS-PS1-5

Which of the following statements is true about an endothermic reaction.?

• More bonds formed than broken

• Energy is absorbed

• Energy of reactants is greater than energy of the products

• ∆H is usually negative

Tags

NGSS.HS-PS1-4