9. _____ friend of my sister’s will come to see her tomorrow. I’m wondering what _____ man he is going to be like.
A. A; the B. A; a C. The; a D. The; the
8. You made the same mistake for _____ second time, dropping _____ “n” in the word “government”.
A. a; the B. a; a C. the; an D. a; an
7. ---- The news is spreading from mouth to mouth.
---- Yes, it’s become _____ talk of _____ town.
A. a; a B. the; / C. the; the D. a; /
6. ______will conquer ______ nature.
A. The man; / B. A man; the
C. Man; / D. The men; the
5. His brother likes ______ history very much. He knows a lot about ______Chinese history, especially ______history of social development.
A. /; / ; the B. / ; the ; /
C. the ; / ; / D. the ; / ; the
4. To tell you ______ truth, he is not _____ John I know before.
A. the; the B. a; a C. a ; the D. /; a
3. He is _____ honest man and now he is living in Belgium, _____ European country.
A. an; an B. a; an C. an; a D. an; the
2. Let us suppose that you are in____ position of____ parent. Would you allow your child to do such a thing?
A. a; a B. a; the C. the; a D. the; the
1. As is known to us all, _________ tiger is in _________ danger of becoming extinct.
A. the, a B. the, 不填 C. a,不填 D. 不填,the
19.(09年山東理綜·10)下列關于氯的說法正確的是
A.Cl2具有很強的氧化性,在化學反應中只能作氧化劑
B.若35 17Cl、37 17若Cl為不同的核素,有不同的化學性質學科
C.實驗室制備Cl2,可用排放和食鹽水集氣法收集
D.1.12LCl2含有1.7NA個質子(NA 表示阿伏伽德羅常數)
答案:C
解析:本題以氯元素為載體,從氧化還原、原子結構、收集方法不同角度進行考查,體現了山東理綜化學選擇題的命題模式。氯氣與水的反應既是氧化劑也是還原劑;同一元素的不同核素化學性質幾乎完全相同而物理性質不同;D中提Cl2的體積未指明是標準狀況。實驗室制備Cl2,可用排飽和食鹽水集氣法收集也可用瓶口向上排空氣法收集,故C正確。
20.(09年海南化學·8)下列敘述正確的是(用NA代表阿伏加德羅常數的值)
A.2.4g金屬鎂變為鎂離子時失去的電子數為0.1NA
B.1molHCl氣體中的粒子數與0.5 mo1/L鹽酸中溶質粒子數相等
C.在標準狀況下,22.4LCH4與18gH2O所含有的電子數均為10 NA
D.CO和N2為等電子體,22.4L的CO氣體與lmol N2所含的電子數相等
答案:C
解析:A中鎂為0.1mol,失去的電子數為0.2 NA;B中鹽酸無體積,不能計算出粒子數;D選項中使用氣體摩爾體積不是在標準狀況下。
21.(09年海南化學·11)在5mL 0.05 mo1/L的某金屬氯化物溶液中,滴加0.1 mo1/L AgNO3溶液,生成沉淀質量與加入AgNO3溶液體積關系如圖所示,則該氯化物中金屬元素的化合價為:
A.+1 B.+2 C.+3 D.+4
答案:C
解析:設氯化物化學式為MClx
MClx -- x AgNO3
1 x
5mL×0.05 mol·L-1 0.1 mol·L-1×7.5mL
x = 3
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