A) Physical change B) Chemical change C) None of these
A) Physical change B) None of these C) Chemical change
A) None of these B) Chemical change C) Physical change
A) None of these B) True C) False
A) None of these B) Chemical change C) Physical change
A) None of these B) Chemical change C) Physical change
A) Chemical change B) Physical change C) Both physical and chemical changes
A) both physical and chemical change B) Chemical change C) Physical change
A) True B) False
A) This was a chemical change because a solid formed in the solution. B) This is NOT a chemical reaction because we just mixed together two liquids. Dissolving is a physical change.
A) A physical change took place B) Gas was produced in the chemical reaction. C) A color change took place. D) One of the new chemicals that formed was a solid.
A) when food rots B) rusting iron C) melting ice D) burning wood
A) chopping onions B) burning coal C) dynamite exploding D) digesting food
A) physical B) chemical C) combustion
A) zinc and hydrochloric acid B) zinc and hydrogen C) hydrochloric acid and hydrogen D) zinc chloride and hydrogen
A) sugar, carbon and water B) sugar C) heat D) carbon and water
A) sugar, carbon and water B) sugar C) carbon and water D) heat
A) oxygen B) hydrogen peroxide and oxygen C) manganese dioxide and oxygen D) manganese dioxide & hydrogen peroxide
A) sodium carbonate + water --> sodium hydroxide + carbon dioxide B) sodium hydroxide + carbon dioxide --> sodium carbonate + water C) none of the answers are correct D) sodium hydroxide + carbon dioxide + sodium carbonate --> water
A) barium sulfate + nitric acid --> barium nitrate + sulfuric acid B) barium nitrate + sulfuric acid --> barium sulfate + nitric acid C) none of the answers are correct D) barium nitrate <-- sulfuric acid + barium sulfate + nitric acid
A) a change of state B) none of these are correct C) change in temperature D) oxygen gas is produced
A) increase in temperature B) none of these are correct. C) gas formation D) precipitate formation
A) none of the answers are correct. B) hydrogen could possibly be a product in this reaction C) a precipitate was the reactant D) the products were liquid water and solid sodium chloride
A) oxygen B) hydrogen C) carbon dioxide D) hydrogen or oxygen
A) oxygen B) hydrogen C) carbon dioxide D) oxygen or hydrogen
A) oxygen B) hydrogen C) carbon dioxide D) marble chips E) hydrochloric acid |