2. 下列何者是膠體？
(A) NaCl 溶液
(B) C6H12O6 溶液
(C) 牛奶
(D) 乙醇溶液

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統計： A(2), B(7), C(95), D(0), E(0) #3425697

詳解 (共 2 筆)

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膠體溶液(溶質1 nm ~ 1000 n...

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[膠體—相關考古題]
30. 膠體粒子一般是藉由何種力量分散於溶液中而不會產生聚集沈澱？
(A) 凡得瓦力
(B) 偶極作用力
(C) 分子間氫鍵
(D) 靜電斥力
答案：D
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33. 水的淨化過程包含清除浮懸物質、消毒與除臭。請問在自來水的處理中，加入鋁鹽(如：明礬 KAl(SO4)2·12H2O)其作用主要為何？
(A) 軟化劑
(B) 凝聚劑
(C) 消毒劑
(D) 除臭劑
答案：B
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26. Which of the following statements is incorrect for colloids?
(A) Colloids are suspension of very large particles ( ＞2000 nm) in a medium.
(B) Tyndall effect is observed for colloids.
(C) Electric repulsion seems to be the main factor that stabilizes colloids.
(D) Removal of soot from smoke is an example of coagulation of colloids.
(E) None of the above.
答案：A
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24. A colloid is a mixture in which one substance consisting of microscopically dispersed insoluble particles is suspended throughout another substance. Which of the following statements about colloids is correct?
(A) A visible light beam is used to distinguish the solution from the colloid.
(B) H+, K+, S2- , and Br- can coexist in large amounts in iron hydroxide colloids.
(C) Fe(OH)3 colloid can be produced upon the dropwise addition of saturated FeCl3(aq) to the concentrated ammonia.
(D) The hydrolysis of alum produces colloidal particles with adsorption, which can be used as bleaching agent.
(E) The specific surface area of soil colloidal particles is huge and generally positively charged, which can adsorb NH4+. and other ions and make the soil have fertilizer retention capacity.
答案：A
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