A) None of these B) Chemical change C) Physical change
A) Physical change B) None of these C) Chemical change
A) Physical change B) None of these C) Chemical change
A) None of these B) False C) True
A) Physical change B) Chemical change C) None of these
A) None of these B) Physical change C) Chemical change
A) Both physical and chemical changes B) Physical change C) Chemical change
A) Physical change B) Chemical change C) both physical and chemical change
A) True B) False
A) This is NOT a chemical reaction because we just mixed together two liquids. Dissolving is a physical change. B) This was a chemical change because a solid formed in the solution.
A) A physical change took place B) One of the new chemicals that formed was a solid. C) A color change took place. D) Gas was produced in the chemical reaction.
A) melting ice B) burning wood C) when food rots D) rusting iron
A) burning coal B) digesting food C) dynamite exploding D) chopping onions
A) physical B) chemical C) combustion
A) zinc and hydrogen B) zinc chloride and hydrogen C) hydrochloric acid and hydrogen D) zinc and hydrochloric acid
A) carbon and water B) heat C) sugar D) sugar, carbon and water
A) sugar, carbon and water B) carbon and water C) sugar D) heat
A) manganese dioxide and oxygen B) oxygen C) hydrogen peroxide and oxygen D) manganese dioxide & hydrogen peroxide
A) none of the answers are correct B) sodium hydroxide + carbon dioxide --> sodium carbonate + water C) sodium hydroxide + carbon dioxide + sodium carbonate --> water D) sodium carbonate + water --> sodium hydroxide + carbon dioxide
A) none of the answers are correct B) barium sulfate + nitric acid --> barium nitrate + sulfuric acid C) barium nitrate + sulfuric acid --> barium sulfate + nitric acid D) barium nitrate <-- sulfuric acid + barium sulfate + nitric acid
A) a change of state B) none of these are correct C) oxygen gas is produced D) change in temperature
A) increase in temperature B) gas formation C) none of these are correct. D) precipitate formation
A) the products were liquid water and solid sodium chloride B) hydrogen could possibly be a product in this reaction C) none of the answers are correct. D) a precipitate was the reactant
A) hydrogen or oxygen B) oxygen C) hydrogen D) carbon dioxide
A) hydrogen B) carbon dioxide C) oxygen or hydrogen D) oxygen
A) marble chips B) hydrochloric acid C) oxygen D) hydrogen E) carbon dioxide |