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WorksheetsIntroduction to Chemistry Quiz
Total questions: 20
Worksheet time: 10mins
Which of the following best defines chemistry?
The study of living organisms
The study of matter and its interactions
The study of celestial objects
The study of forces and motion
Which of the following is NOT considered a branch of chemistry?
Organic chemistry
Biochemistry
Astronomy
Physical chemistry
What is the smallest unit of an element that retains its chemical properties?
Molecule
Proton
Atom
Compound
Which of the following is an example of a chemical change?
Ice melting
Paper burning
Salt dissolving in water
Breaking a glass
Which of the following states of matter has a definite volume but takes the shape of its container?
Solid
Liquid
Gas
Plasma
Which subatomic particle carries a negative charge?
Proton
Neutron
Electron
Nucleus
The number of protons in the nucleus of an atom is known as its:
Atomic weight
Atomic number
Mass number
Valency
Which of the following is a homogeneous mixture?
Sand and iron filings
Oil and water
Saltwater
Salad
Which type of bond involves the sharing of electrons between atoms?
Ionic bond
Covalent bond
Hydrogen bond
Metallic bond
Which law states that mass is neither created nor destroyed in a chemical reaction?
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
Avogadro's Law
The periodic table is arranged in order of increasing:
Atomic mass
Atomic number
Density
Reactivity
Which element is the most abundant in the Earth's crust?
Oxygen
Hydrogen
Silicon
Iron
Which of the following represents a chemical formula?
H₂O
Na
CO₂
Both a and c
Which of the following is a noble gas?
Oxygen
Nitrogen
Neon
Fluorine
An isotope of an element has a different number of:
Protons
Neutrons
Electrons
Nuclei
Which scientist proposed the modern atomic theory?
Dmitri Mendeleev
John Dalton
J.J. Thomson
Niels Bohr
The pH scale measures the concentration of:
Neutrons
Protons
Hydrogen ions
Electrons
Which of the following is an example of a base?
Vinegar
Lemon juice
Baking soda
Carbon dioxide
Which separation technique is used to separate a mixture based on differences in boiling points?
Filtration
Distillation
Chromatography
Sublimation
Which of the following is a characteristic of a chemical reaction?
Change in color
Formation of a precipitate
Release of gas
All of the above
