问题 选择题

下列实验能达到实验目的的是

选项实验操作实验目的
A室温下,测定等浓度的CH3COOH溶液和盐酸的pH比较两种酸的酸性强弱
BCH3CH2Br中加入NaOH溶液加热充分反应,取上层水溶液加入AgNO3溶液检验CH3CH2Br中的溴原子
C向25ml沸水中滴加4—5滴饱和FeCl3溶液,加热至有红褐色沉淀产生制备Fe(OH)3胶体
D在某溶液中先加入HNO3溶液,再加入Ba(NO3)2溶液检验溶液中是否存在SO42-

答案

答案:A

题目分析:A.在相同的温度下,测不同物质的水溶液pH,pH越小,溶液的酸性就越强。因此可以比较溶液的酸碱性。正确。B. CH3CH2Br中加入NaOH溶液加热充分反应,然后取上层水溶液加入硝酸将溶液酸化,再加入AgNO3溶液,检验CH3CH2Br中的溴原子。错误。C.向25ml沸水中滴加4—5滴饱和FeCl3溶液,加热至溶液变为红褐色,停止加热。这样就制备得到了Fe(OH)3胶体。错误。D.若该溶液中含有SO32-离子,加入硝酸时会被氧化为SO42-再加入Ba(NO3)2溶液,一样会产生白色沉淀。错误。

阅读理解

The Museum of Childhood is Australia’s most comprehensive collection of childhood items including toys, dolls, infant and school material.

Housed in a modern facility(设施), the displays reflect Australian childhood experience over time including play, child rearing(=raising),orphanage(孤儿院)childhood and home, school and war time experience.

There are many hands-on exhibits and education sessions including the famous” lesson” in the 1920s One Teacher Bush Classroom.

The Museum also hosts national touring exhibitions and conducts special activities on Sundays and school holidays(ring for details).

Open: Tuesday—Friday 10am—4pm,Sunday 10am—4:30pm,or by arrangement.

Special activities on Sundays as advertise.

Closed: Public holidays,16 December—18 January.

Location: Edith Cowan University campus, Bay Road, Claremont(take bus 208 and alight at the Bay Road and Princessinter section. The Museum is 15 minutes’ walk from Claremont.

小题1:On_______ you can stay at Museum until half past four.

A.Wednesday

B.Friday

C.Sunday

D.Monday小题2:If you want to attend a special activity, you’d better come on________.

A.Monday

B.Tuesday

C.Saturday

D.Sunday小题3:The underlined word” alight “most probably means________.

A.get off

B.light

C.cross

D.go long小题4:The main purpose of the Museum of Childhood is to__________.

A.display toys, dolls, infant and school material.

B.reflect Australian childhood experience over time.

C.host national touring exhibition.

D.tell you the famous“ lesson” in the 1920s.

单项选择题