下列判断错误的是 （ ）
A．稳定性：HF＞HCl＞HBr＞HI
B．沸点：HI＞HBr＞HCl＞HF
C．酸性：HClO4＞H2SO4＞H3PO4
D．碱性：NaOH＞Mg(OH)2＞Al(OH)3
答案：B
考查元素周期律的应用。同主族元素自上而下金属性逐渐增强，非金属性逐渐减弱。同周期元素自左向右金属性逐渐减弱，非金属性逐渐增强，所以选项A、C和D正确。由于氟化氢分子中存在氢键，所以其沸点要高于其它氢化物的，即HF＞HI＞HBr＞HCl，答案是C。
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| When I was a teenager growing up in France, I wanted to leave school and have my own life. The only way I could do this was to work in the local paper factory in my town, or get married. I was very nervous then I told my 1 I wanted to leave school. I thought he would say, " 2 ! You are going to college." I was very 3 when he said, "OK. Let's go to the paper factory." Two days later, he took me to the factory. I imagined everyone to be friends 4 together and having fun. I even imagined there would be music and singing. I guess I had watched too many movies as a teenager. When we 5 the factory gate, my father spoke to the guard and one minute later we were 6 . I walked around the factory looking at the building, the workers, and listening to the noise. It was 7 . I ran back to my father and said, "I want to go home." He asked me,"What do you think of the factory?" "Too bad," I answered. "And marriage is even 8 !" he said. I went back to school the next day thinking about studying hard 9 I could get into a good college. I 10 studying English, so I decided to major in languages at college. Thanks to my father and our trip to the paper factory, I now work at the United Nations and my father is very proud of me. I married a very good man and my life is much better than it would have been working in the factory! | ||||
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