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