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