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