Chemical reaction

Which general formula shows decomposition reaction?

• A+B -> AB

• AB -> A + B

• AB + C -> AC + B

• AB + CD -> AD + CB

What is two or more substances that are together in the same place but their atoms are not chemically bonded.

• Mixture

• Solution

• Colloid

• Suspension

What type of reaction is the following:
 $2H_2+O_2->2H_2O$  

• Combination

• Decomposition

• Single Replacement

• Double Replacement

_Al + _HCl →_H₂ + _AlCl₃

• 2 Al + 2 HCl → 2 H₂ + 6 AlCl₃
• 3 Al + 3 HCl → 6 H₂ + 2 AlCl₃
• 1 Al + 1 HCl → 3 H₂ + 1 AlCl₃
• 2 Al + 6 HCl → 3 H₂ + 2 AlCl₃

Tags

NGSS.HS-PS1-7

What type of reaction is the following:
 $BaCl_2+2KI\ ->\ 2KCl\ +\ BaI_2$  

• Combination

• Decomposition

• Single Replacement

• Double Replacement

What type of reaction is the following:
 $2KI\ ->\ 2K\ +\ I_2$  

• Combination

• Decomposition

• Single Replacement

• Double Replacement

What type of reaction is the following:
 $2NaHCO_3->\ Na_2CO_3+CO_2+H_2O$  

• Combination

• Decomposition

• Single Replacement

• Double Replacement

What type of reaction is the following:
 $Zn\ +\ 2HCl\ ->\ ZnCl_2+H_2$ 

• Combination

• Decomposition

• Single Replacement

• Double Replacement

Identify the salt in the following equation:
Zn(OH)₂ + HNO₃   ---> H₂O  + Zn(NO₃)₂

• Zn(OH)₂
• HNO₃
• H₂O
• Zn(NO₃)₂

Tags

NGSS.MS-PS1-5

The rate of a reaction increases as temperature__________________.

• Decreases

• Increases

• Stays the Same

• No effects