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