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