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