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