A) None of these B) Chemical change C) Physical change
A) Chemical change B) Physical change C) None of these
A) Chemical change B) None of these C) Physical change
A) False B) True C) None of these
A) Physical change B) Chemical change C) None of these
A) None of these B) Physical change C) Chemical change
A) Chemical change B) Physical change C) Both physical and chemical changes
A) Chemical change B) Physical change C) both physical and chemical 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) Gas was produced in the chemical reaction. B) A physical change took place C) One of the new chemicals that formed was a solid. D) A color change took place.
A) rusting iron B) burning wood C) melting ice D) when food rots
A) chopping onions B) digesting food C) dynamite exploding D) burning coal
A) combustion B) chemical C) physical
A) zinc chloride and hydrogen B) hydrochloric acid and hydrogen C) zinc and hydrogen D) zinc and hydrochloric acid
A) sugar B) carbon and water C) sugar, carbon and water D) heat
A) sugar, carbon and water B) sugar C) heat D) carbon and water
A) manganese dioxide and oxygen B) hydrogen peroxide and oxygen C) oxygen D) manganese dioxide & hydrogen peroxide
A) sodium hydroxide + carbon dioxide --> sodium carbonate + water B) none of the answers are correct C) sodium carbonate + water --> sodium hydroxide + carbon dioxide D) sodium hydroxide + carbon dioxide + sodium carbonate --> water
A) barium nitrate + sulfuric acid --> barium sulfate + nitric acid B) none of the answers are correct C) barium nitrate <-- sulfuric acid + barium sulfate + nitric acid D) barium sulfate + nitric acid --> barium nitrate + sulfuric acid
A) change in temperature B) none of these are correct C) a change of state D) oxygen gas is produced
A) increase in temperature B) none of these are correct. C) gas formation D) precipitate formation
A) hydrogen could possibly be a product in this reaction B) the products were liquid water and solid sodium chloride C) a precipitate was the reactant D) none of the answers are correct.
A) oxygen B) carbon dioxide C) hydrogen D) hydrogen or oxygen
A) carbon dioxide B) oxygen or hydrogen C) oxygen D) hydrogen
A) carbon dioxide B) oxygen C) hydrogen D) marble chips E) hydrochloric acid |