1.简答题- (共1题)
(1)金属与盐溶液之间的置换反应,一般是活动性较强的金属可把活动性较弱的金属从其盐溶液中置换出来。如铜和硝酸银溶液的化学方程式为____________________。
(2)非金属单质也具有类似金属与盐溶液之间的置换反应的规律,即活动性较强的非金属可把活动性较弱的非金属从其盐溶液中置换出来,如在溶液中可发生下列反应:
Cl2+2NaBr==2NaCl + Br2,I2 + Na2S==2NaI + S↓,Br2 + 2KI==2KBr + I2
由此可判断:
①S、Cl2、I2、Br2非金属活动性由强到弱顺序是__________________。
②下列化学方程式书写错误的是___________。
A Cl2 + 2NaI===2NaCl + I2 B I2+2KBr===2KI + Br2
C Br2 + Na2S===2NaBr + S↓ D Cl2 + K2S===2KCl + S↓
2.计算题- (共1题)
| 第一次 | 第二次 | 第三次 |
加入稀盐酸的体积(mL) | 5 | 5 | 5 |
生成氢气的质量(g) | 0.04 | m | 0.02 |
(1)m=______。
(2)此黄铜样品中锌的质量分数是多少______?
3.单选题- (共5题)
A. 铝的化学性质不活泼
B. 铝不与酸、碱反应
C. 铝常温下不与氧气反应
D. 铝表面生成一层致密的氧化铝保护膜

A.镁和铁中至少有一种剩余 |
B.消耗的稀硫酸和稀盐酸质量相等 |
C.消耗铁的质量一定大于消耗镁的质量 |
D.产生氢气的质量相等 |
4.选择题- (共8题)
him sleep quick hurt smell |
①Do you know why Jenny ran {#blank#}1{#/blank#} out of the room?
②The baby is too young to look after{#blank#}2{#/blank#}.
③I got up too early and I'm feeling very {#blank#}3{#/blank#} now.
④My brother {#blank#}4{#/blank#} his leg when he fell off the bike.
⑤This flower sends out one kind sweet {#blank#}5{#/blank#}.
him sleep quick hurt smell |
①Do you know why Jenny ran {#blank#}1{#/blank#} out of the room?
②The baby is too young to look after{#blank#}2{#/blank#}.
③I got up too early and I'm feeling very {#blank#}3{#/blank#} now.
④My brother {#blank#}4{#/blank#} his leg when he fell off the bike.
⑤This flower sends out one kind sweet {#blank#}5{#/blank#}.
him sleep quick hurt smell |
①Do you know why Jenny ran {#blank#}1{#/blank#} out of the room?
②The baby is too young to look after{#blank#}2{#/blank#}.
③I got up too early and I'm feeling very {#blank#}3{#/blank#} now.
④My brother {#blank#}4{#/blank#} his leg when he fell off the bike.
⑤This flower sends out one kind sweet {#blank#}5{#/blank#}.
5.填空题- (共1题)
-
【1】题量占比
简答题:(1道)
计算题:(1道)
单选题:(5道)
选择题:(8道)
填空题:(1道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:1
5星难题:0
6星难题:1
7星难题:0
8星难题:3
9星难题:2