问题 填空题

(09河南省)(3分)物质的用途与其性质密切相关,研究金属的性质可以更好地利用金属。

(1)2009年“拍卖风波”中的兔首和鼠首是青铜器。久置的铜制品表面会锈蚀生成铜绿[Cu2(OH)2CO3],铜绿是铜与空气中的氧气、水和           共同作用的结果。

(2)为探究铝、铁、铜的活动性顺序,某同学设计了一组实验:①铝片浸入稀硫酸中 ②铜片浸入稀硫酸中  ③铝片浸入硫酸亚铁溶液中。 这组实验还不能完全证明三种金属的活动性顺序,请补充一个实验来达到目的(写出实验步骤、现象和化学方程式)。

答案

(1)二氧化碳(1分)

(2)将铁片浸入硫酸铜溶液中,铁片表面有红色固体析出。

(或将铁片浸入稀硫酸中,有气泡产生等。) (1分)

Fe+CuSO4=FeSO4+Cu (或Fe+H2SO4=FeSO4+H2↑等) (1分)

(1)由于金属铝容易和空气中的氧气反应生成一层致密的氧化膜,会阻碍铝的进一步的锈蚀,因此铝不容易锈蚀,而铁在潮湿的空气中容易生锈;故答案为:铝的表面形成了一层致密的氧化膜,阻碍铝的进一步锈蚀.

(2)通过题意不难看出,该同学只能验证出金属铝的活动性比铜和铁强,但铜和铁的活动性但无法验证出,因此为验证这两种金属的活动性顺序,可补充铁和稀硫酸的反应或铁和硫酸铜溶液的反应等.

故答案为:

(1)铝在常温下与空气中的氧气发生反应,使其表面生成一层致密的氧化铝薄膜,阻止了内部的铝进一步被氧化.       

(2)将铁片浸入硫酸铜溶液中,铁片表面有红色固体析出.

(或将铁片浸入稀硫酸中,有气泡产生等.)

Fe+CuSO4═FeSO4+Cu (或Fe+H2SO4═FeSO4+H2↑等)

阅读理解
配对阅读 左栏是五个人的兴趣介绍,右栏是七个运动项目的简介。请根据五个人的情况为他们选出最合适的运动项目,并将答题卡上对应题目所选的选项涂黑。其中有两个选项为多余。
小题1:Amy used to teach swimming to small children. It was exciting to see them begin to lose their fear of water and begin to have fun!
小题2:Tom likes climbing. He says, “ When I reach the top, I can enjoy the beautiful sights better.”
小题3:Running is John’s favorite sport. He runs 1,000 meters every day. He is very healthy now.
小题4:Mike tried golf last week and he really enjoyed it. A friend asked him if he wanted to go golfing again, and he agreed quickly.
小题5:Sue is 14 and lives in England. Her father works in a horse-riding school. She has been riding since she was six.
A.Continuing training will help a lot to make professional athletes more successful. It does not take long for you to make progress from this training.
B.While practising running in a proper way, it’s easy to learn. You’ll also find that your body doesn’t become tired so easily when you keep up proper running form.
C.If you have ever thought about playing golf, Get golf ready is for you. You will be taught by training PGA and LPGA professionals. They will make sure you have fun each step of the way.
D.Climbing a mountain is hard work. But the higher you climb, the more wonderful your view(视野)is.
E. Learning to play tennis can be a lot of fun, even if you don’t know much about tennis or are just beginning to learn it. We’ll prepare everything from the equipment to the playing court.
F. The first thing you learn to ride a horse is how to get onto a horse. Then you have to learn how to move up and down at the same time as the horse.
G. Never dive off the side of the pool unless an adult says that the water is deep enough.
多项选择题