CK Chemical Reactions/Word Equations Practice

Which is NOT a chemical reaction?

• eggs being cooked in a pan

• a nail gradually rusting

• mold growing on a piece of cheese

• water seeping through a pot of soil

Tags

NGSS.MS-PS1-2

In a chemical reaction reaction, the reactant undergoes:

• functional changes

• chemical changes

• structural changes

• all of the others

Tags

NGSS.MS-PS1-2

What are the reactants?

sodium + water --> sodium hydroxide + hydrogen

• sodium and sodium hydroxide

• sodium and water

• water and hydrogen

• sodium hydroxide and hydrogen

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a chemical reaction, the substances which are present at the beginning are called reactants.

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Silver exposed to sulfur turns black. The compound formed is ______ and is commonly referred to as ________.

• Silver oxygen; tarnish

• Silver sulfur; tarnish

• silver oxide; tarnish

• silver sulfide; tarnish

Tags

NGSS.MS-PS1-1

Chemical reactions yield _______.

• products

• reagents

• reactants

• all of the others

What is the "major drawback" to using word equations?

• Word equations can't be translated to other languages.

• Word equations are not quantitative.

• Words are not specific enough to identify chemicals.

2SO₂ + O₂ --> 2SO₃ The coefficient of SO₃ is 2.

• True

• False

Tags

NGSS.MS-PS1-5

The starting materials converted into new compounds in a chemical reaction are known as products.

• true

• false

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Do we use the equal sign (=) in a chemical equation?

• yes

• no