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问题 选择题

当光束通过下列分散系时，能观察到丁达尔效应的是（   ）

A．水泥

B．盐酸

C．NaCl 溶液

D．Fe (OH )3胶体

答案

答案：D

当光束通过下列分散系时，能观察到丁达尔效应的是胶体，所以正确选项为D；

选择题

能在溶液中大量共存的一组离子是[ ]

A.NH4+、Ag+、PO43-、Cl-

B.Fe3+、H+、I-、HCO3-

C.K+、Na+、NO3-、MnO4-

D.Al3+、Mg2+、SO42-、CO32-

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问答题

Umar entered into the following two separate contracts with Ramu:(i) a contract to purchase Ramu’s two-acre plot of land at Cameron Highlands for RM3 million, which reflects its fair market price; and(ii) a contract to sell to Ramu, his (Umar’s) motorcar, a Toyota Corolla, for RM50,000. The market price of the car is RM55,000.Subsequently Ramu, without giving any reason, informed Umar that he did not want to sell the land to Umar. Umar then told Ramu, ‘In that case I refuse to sell you my car. I will also sue you for breach of contract.’ Ramu replied that he too would sue Umar for breach of contract if Umar did not sell the motorcar to him as agreed.Required:Advise Umar regarding,

(b) the most likely remedy which the court may order against him (Umar) in favour of Ramu for breach of contract in relation to the sale of the motorcar. (5 marks)
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