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