Chemical Reactions Grade 10

Question: What type of chemical reaction is represented by the following equation?

2H2​+O2​→2H2​O

• Double displacement reaction
• Synthesis

• Decomposition reaction
• Combination reaction

What is the type of reaction when a compound reacts with oxygen to produce heat and light?

• Decomposition

• Double replacement

• Combustion

What type of chemical reaction is represented by the following equation?

2KBr+Ba(NO3​)2​→2KNO3​+BaBr2​

• Combustion reaction
• Decomposition reaction
• Synthesis reaction
• Double displacement reaction

When a chemical reaction releases heat to its surroundings, it is classified as:

(a)  

In a decomposition reaction, what is the primary driving force for the reaction?

• Breaking down of a compound into simpler substances
• Combining two compounds to form a more complex substance
• No driving force, it happens spontaneously
• Formation of a compound from simpler substances

In an endothermic reaction, the surroundings typically experience a:

• increase in temperature
• no change in temperature
• decrease in temperature
• decrease in pressure

When a cold pack is activated, and it becomes cold due to a chemical reaction, the reaction is likely:

• Exothermic
• Combustion
• Endothermic
• Neutral

What is endothermic reaction

• A chemical reaction that absorbs heat from its surroundings
• A reaction that does not involve any heat exchange
• A chemical reaction that releases heat to its surroundings
• A reaction that occurs at a constant temperature

What is the primary factor that distinguishes exothermic and endothermic reactions?

• The color of the reactants
• The size of the container
• The transfer of heat
• The speed of the reaction

What type of chemical reaction is represented by the following equation?

2NaCl+F2​→2NaF+Cl2

• Single displacement reaction
• Double displacement reaction
• Combustion reaction
• Decomposition reaction