What is the definition of chemistry?

• Chemistry is the study of matter and the changes it undergoes.

• Chemistry is the study of living organisms.

• Chemistry is the study of historical events and their impacts.

• Chemistry is the study of celestial bodies and their movements.

What are the main branches of chemistry?

• Organic Chemistry, Inorganic Chemistry, Physical Chemistry, Analytical Chemistry, Biochemistry

• Industrial Chemistry

• Environmental Chemistry

• Theoretical Chemistry

What is the difference between organic and inorganic chemistry?

• Organic chemistry is only concerned with synthetic compounds.

• Inorganic chemistry deals exclusively with biological processes.

• Organic chemistry focuses on metals and minerals.

• Organic chemistry studies carbon-containing compounds, while inorganic chemistry studies non-carbon compounds.

What is the significance of the periodic table?

• The periodic table is significant because it systematically categorizes elements, allowing for the prediction of their properties and behaviors.

• It is a historical document of element discovery.

• It serves as a decorative piece in laboratories.

• It is used primarily for teaching chemistry basics.

What are atoms and molecules?

• Atoms are larger than molecules.

• Molecules are single atoms.

• Atoms are made up of molecules.

• Atoms are the fundamental units of matter, while molecules are combinations of two or more atoms bonded together.

What is a chemical reaction?

• A chemical reaction is a process that transforms reactants into products by breaking and forming chemical bonds.

• A chemical reaction is a process that only involves physical changes.

• A chemical reaction is a method of measuring temperature changes in substances.

• A chemical reaction is the mixing of substances without any change.

What is the law of conservation of mass?

• Mass is only conserved in physical changes.

• Mass can be created in chemical reactions.

• Mass can be destroyed during a reaction.

• Mass is conserved in chemical reactions; it cannot be created or destroyed.

What are acids and bases?

• Acids are substances that turn blue litmus red, while bases turn red litmus blue without any exceptions.

• Acids are always sour and bases are always bitter.

• Acids are proton donors and bases are proton acceptors.

• Acids and bases are both neutral substances that do not react with each other.

What is pH and why is it important?

• pH is a type of chemical compound used in cooking, important for flavor enhancement.

• pH is a measure of temperature and pressure, important for weather forecasting.

• pH is a measure of acidity or alkalinity, important for chemical reactions and biological processes.

• pH is a measure of color intensity in solutions, important for aesthetic purposes.

What is the role of a catalyst in a chemical reaction?

• A catalyst slows down a chemical reaction by increasing the activation energy.

• A catalyst speeds up a chemical reaction by lowering the activation energy.

• A catalyst is a substance that is consumed in the reaction.

• A catalyst changes the products of a chemical reaction.