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