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