Chemical Reaction Quiz

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄
• HSO₄
• H₄S₃O
• H₂O

Tags

NGSS.MS-PS1-1

Which is NOT an example of chemical change?

• production of gas.

• change in color.

• change in size.

• transfer of energy.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

2H₂O + 2N → 4H + 2NO

The chemical symbols on the RIGHT (at the end of the equation) are called:

• products

• reactants

• yields/produces

Which of the following chemical equations follows the Law of Conservation of Mass? Hint: which is balanced?

• CO₂ + H₂O --> C₆H₁₂O₆ + O₂

• C₆O + H₁₂O --> C₆H₁₂O₂

• CO₂ + H₂O --> C₆H₁₂O₆ + O₂

• CO₂ +H₂O --> C₆H₁₂O₆ +O₂

Tags

NGSS.MS-PS1-5

How do covalent bonds form?

• Donating & receiving valence e- between atoms.
• Opposite slight charges attract each other between compounds.
• Scientists are still not sure how they form.
• Sharing valence e- between atoms.

What is a chemical reaction?

• a change in matter when the molecules rearrange to make new molecules

• a change in matter when matter changes its form or appearance

• a change in matter when the physical appearance changes

• a very boring change in matter

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

NGSS.MS-PS1-1

When energy like heat and light are given off in a chemical reaction it is called

• exothermic

• endothermic

• eccentric

• ectomorphic

Tags

NGSS.MS-PS1-6

Signs of a chemical change could be:

• a change in energy (temperature, light, sound)

• a precipitate forms (a solid forms from 2 liquids)

• formation of gas (bubbles)

• shocking change in color

• all of these answers are signs of chemical change

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The products are:

• molecular oxygen and 2 carbon

• 2 carbon monoxide

• all of these are products

• all of these are reactants

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

__Na + __Cl₂ --> __NaCl

• 1,1,2
• 2,1,2
• 2,1,1
• already balanced

Tags

NGSS.MS-PS1-5