Ujian Ilmu Kimia

Which statement best describes the nature of chemistry?

• Chemistry only studies toxic substances and dangers

• Chemistry is only used in laboratories and factories

• Chemistry studies the structure, properties, changes, and energy associated with a material

• Chemistry has no influence in everyday life

• Chemistry is only useful for scientists

An example of a chemical change below is...

• Ice melts

• Water evaporates

• Sugar dissolves in water

• Paper burns

• Metal is formed

The chemical properties of a substance are indicated by...

• Color of the substance

• Melting point

• Reaction with acid

• Solubility

• Density

One of the roles of chemistry in agriculture is...

• Production of chemical fertilizers

• Manufacturing electronic devices

• Making steel

• Oil production

• Data management

Which example shows a physical change?

• Paper is burned

• Iron rusts

• Water boils

• Rice goes bad

• Wood rots

A student mixes an acid solution with a base and produces salt and water. This shows the basic principle of chemistry because...

• It can only be done by scientists

• There is a physical change

• No reaction occurs

• A chemical change occurs

• It does not involve energy

What is meant by a pure substance?

• A substance that has not mixed with another substance

• A substance that does not contain elements

• A substance that comes from nature

• A substance that is odorless

• A substance that is easily soluble

An example of the application of chemistry in everyday life is...

• Reading a book

• Watering plants

• Frying eggs

• Recording schedules

• Playing soccer

The laboratory equipment used to measure the volume of a solution accurately is...

• Measuring cup

• Erlenmeyer

• Buret

• Test tube

• Tripod

The following is a tool commonly used to heat chemical substances in the laboratory, except...

• Tripod

• Wire gauze

• Spirit burner

• Measuring cup

• Bunsen burner