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