Chemical Reactions Review

Which of the following 2 are chemical reactions?

• sugar dissolving in water

• water turning into steam

• burning wood

• mixing baking soda and vinegar

• tearing paper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Select the pair of words that correctly displays the general FORMAT for writing chemical equations

• products --> reactants

• products --> products

• reactants--> products

• reactants --> reactants

Reactant 1 is 4 grams, reactant 2 is 2 grams. How many total grams is the product?

• 4 grams

• 2 grams

• 6 grams

• 10 grams

Tags

NGSS.MS-PS1-5

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

• It is an exothermic reaction

• It is an endothermic reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Two clear liquids are mixed together and turns pink

• Physical property

• Chemical property

Tags

NGSS.MS-PS1-2

In an endothermic reaction, heat is ...

• taken in

• given out

Tags

NGSS.MS-PS1-4

In an exothermic reaction, heat is ...

• taken in

• given out

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

What type of reaction occurs in a hand warmer?

• exothermic

• endothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

What is able to dissolve other substances?

• Solute

• Solution

• Salt

• Solvent

Baking bread and cooking an egg are examples of....?

• Endothermic processes

• Exothermic processess

• None of these 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4