Chemistry Quiz

What reaction has the following general formula:

AB --> A + B

• Combination

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

Tags

NGSS.MS-PS1-2

Dissolving salt is a

• Chemical change

• Physical change

Tags

NGSS.MS-PS1-2

Predict the products for the this reaction:
K + HCl --> 

• KCl + H2
• KHCl 
• KH + Cl2
• KCl + H

Tags

NGSS.HS-PS1-2

Which of the following equations represents the balanced synthesis reaction of iron (III) and oxygen?

• Fe + 3 O₂ → Fe₂O₃
• 3 Fe + 3 O₂ → 2 Fe₂O₃
• 2 Fe + O₂ → Fe₂O₃
• 4 Fe + 3 O₂ → 2 Fe₂O₃

Tags

NGSS.HS-PS1-7

What kind of reaction is this:
2H₂O₂ →2 H₂O + O₂

• Synthesis
• Decomposition
• Single Replacement 
• Combustion

Tags

NGSS.MS-PS1-2

Flame colour for calcium ions

• Blue
• Red
• Green
• Yellow

Metal ion with a lilac flame

• Na⁺
• K⁺
• Na²⁺
• K²⁺

Colour of precipitate when sodium hydroxide is added to a copper(II) ion solution.

• White
• Brown
• Green
• Blue

Colour of precipitate when sodium hydroxide is added to a iron(II) ion solution.

• White
• Brown
• Green
• Blue

Test for bromide ions is....

• Add hydrochloric acid
• Add barium chloride
• Add nitric acid then silver nitrate