Spring 2024 Semester Test

Each substance to the right of the arrow in a chemical equation is a(n) __________.

• Catalyst

• Product

• Reactant

• Inhibitor

Tags

NGSS.MS-PS1-5

The numbers that go before symbols and formulas in a chemical equation are __________.

• Superscripts

• Subscripts

• Catalysts

• Coefficients

Substances that speed up chemical reactions are called __________.

• Inhibitors

• Products

• Reactants

• Catalysts

A(n) __________ chemical equation has the same number of atoms of each element on each side of the equation.

• unbalanced

• balanced

• simple

• complex

Tags

NGSS.MS-PS1-5

If something is burned, a __________ reaction has occurred.

• double displacement

• single displacement

• combustion

• synthesis

Tags

NGSS.MS-PS1-5

Why does an increase in temperature result in an increase in reaction rate?

• It raises the activation energy

• It causes the molecules to increase in size

• It decreases the concentration of reactants

• It causes an increase in the number of particle collisions

Tags

NGSS.MS-PS1-4

In a chemical equation, the symbol that means dissolved in water is __________.

• (s)

• (l)

• (g)

• (aq)

What type of reaction is the following chemical reaction? CH₃CH₂OH + 3O₂ → 2CO₂ + 3H₂O

• double-displacement

• single-displacement

• combustion

• synthesis

Which chemical reaction represents a double displacement reaction?

• 2Na + Cl₂ → 2NaCl

• Zn + 2HCl → ZnCl₂ + H₂

• 2KClO₃ → 2KCl + 3O₂

• NaOH + HCl → NaCl + H₂O

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

When a wood fire burns, it releases heat into the environment. This type of reaction is __________.

• endothermic

• exothermic

• endergonic

• exergonic

Tags

NGSS.MS-PS1-4