Basic Chemistry Quiz

What is a substance made of atoms of different elements bonded together?

• Element

• Ion

• Compound

• Molecule

What type of bond forms when atoms share a pair of electrons?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

What is the charge of a proton?

• Negative

• Positive

• No charge

• Neutral

What is the term for a mixture of substances that is the same throughout?

• Solute

• Solution

• Solvent

• Suspension

What is the attraction among molecules of the same substance called?

• Adhesion

• Cohesion

• Solution

• Solvent

What is the attraction among molecules of different substances called?

• Cohesion

• Adhesion

• Solution

• Solvent

What type of bond is an attraction between a slightly positive hydrogen atom and a slightly negative atom?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

What is the main job of a catalyst?

• It increases the temperature of a reaction.

• It speeds up the reaction and lowers the activation energy.

• It changes the products of a reaction.

• It absorbs energy from the surroundings.

What kind of chemical reaction absorbs more energy than it releases?

• Exothermic reaction

• Endothermic reaction

• Combustion reaction

• Neutralization reaction

Which line in the diagram shows the activation energy without a catalyst (enzyme)?

• green

• dotted

• no line

• i dont know