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