Chemical Reactions and Equations Practice Quiz

Which of these is NOT a sign of a chemical reaction?

• A gas is given off

• The material dissolves

• Heat is released

• A color change occurs

Tags

NGSS.MS-PS1-2

The substance that is formed in a chemical reaction is called the

• polymer.

• reactant.

• product.

• radical.

Tags

NGSS.MS-PS1-5

In a balanced chemical equation, the mass of the reactant is equal to the

• atoms in a molecule.

• atomic mass of the elements.

• volume of the reactacts.

• mass of the products.

Tags

NGSS.MS-PS1-5

What happens in a chemical reaction?

• Atoms are destroyed.

• Atoms are created.

• Atoms are rearranged.

• Atoms gain/lose atomic mass.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The substance(s) on the right side of the arrow in a chemical equation is called the

• catalyst.

• precipitate.

• reactant.

• product.

Tags

NGSS.MS-PS1-5

Which of the following is NOT a "Tell-Tell" evidence of a possible chemical reaction?

• formation of a gas

• state of matter change

• formation of a solid

• color change

• temperature change

Tags

NGSS.MS-PS1-2

What coefficient is missing in the following balanced chemical equation: 2Ni₂O₃ >>> 4Ni + __O₂

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS1-5

Which of the following equations is NOT balanced?

• Fe + S >>> FeS

• KOH + HCl >>> KCl + H₂O

• 2Mg + O₂ >>> 2MgO

• NaCl + H₂SO₄ >>> Na₂SO₄ + HCl

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemical equation is balanced by changing or adding

• chemical symbols.

• subscripts.

• coefficients.

• reactants.

What is the balanced equation for the combustion of sulfur?

• S + O₂ >>> SO

• S + O₂ >>> SO₂

• 2S + 3O₂ >>> SO₃

• S + 2O₂ >>> SO₂^4–

Tags

NGSS.MS-PS1-5