Chemical Reactions Quiz

What is a product in a chemical reaction?

• A substance that is used up in the reaction

• A substance that is produced in the reaction

• A substance that speeds up the reaction

• A substance that starts the reaction

Which of the following is a key word related to chemical reactions?

• Catalyst

• Reactant

• Solvent

• Precipitate

Which element is represented by the symbol 'I'?

• Iron

• Indium

• Iodine

• Iridium

Which element has the atomic number 7?

• Oxygen

• Nitrogen

• Vanadium

• Cerium

Which of the following reactions absorbs heat from the surroundings?

• Exothermic

• Endothermic

• Combustion

• Synthesis

What is a common phenomenon observed in exothermic reactions?

• Cooling

• Heating

• Freezing

• Melting

What is a common phenomenon observed in endothermic reactions?

• Heating

• Cooling

• Burning

• Exploding

Which of the following is an indication of a chemical reaction?

• Change in temperature

• Formation of a precipitate

• Increase in volume

• Decrease in mass

What does the formation of bubbles during a chemical reaction indicate?

• Formation of a solid

• Evolution of gas

• Change in color

• Increase in temperature

In the context of chemical reactions, what does the arrow typically represent?

• The direction of the reaction

• The speed of the reaction

• The temperature of the reaction

• The pressure of the reaction