Chemistry Pre Assessment Regents

Which substance can be broken down by a chemical change?

• antimony

• carbon

• hexane

• sulfur

Tags

NGSS.MS-PS1-2

Which substance cannot be broken down by a chemical reaction?

• ammonia

• argon

• methane

• water

Which substance can be decomposed by a chemical change?

• Co

• CO

• Cr

• Cu

Which substance cannot be broken down by a chemical change?

• ammonia

• mercury

• propane

• water

Which substance can be broken down by chemical means?

• magnesium

• manganese

• mercury

• methanol

Which statement describes the type of change and the chemical properties of the product and the reactants?

• The equation represents a physical change, with the product and reactants having different chemical properties

• The equation represents a physical change, with the product and reactants having identical chemical properties

• The equation represents a chemical change, with the product and reactants having different chemical properties

• The equation represents a chemical change, with the product and reactants having identical chemical properties

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which balanced equation represents a chemical change?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

Which statement describes a chemical property of silicon?

• Silicon has a blue-gray color

• Silicon melts at 1414^oC

• Silicon is a brittle solid at 20^oC

• Silicon reacts with fluorine

Which statement describes a chemical property of aluminum?

• Aluminum is malleable

• Aluminum reacts with sulfuric acid

• Aluminum conducts an electric current

• Aluminum has a density of 2.698 g/cm³ at STP

Tags

NGSS.HS-PS1-1

Which statement describes a chemical property of bromine?

• Bromine is soluble in water

• Bromine has a reddish-brown color

• Bromine combines with aluminum to produce AlBr₃

• Bromine changes from a liquid to a gas at 332 K and 1 atm.

Tags

NGSS.HS-PS1-1