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