1.单选题- (共12题)



A.化学反应中分子可分为原子 | B.反应前后原子的种类不变 |
C.反应前后分子的数目不变 | D.生成物中元素的存在状态为化合态 |
A. S-诱抗素由碳氢氧三种元素组成
B. S-诱抗素中碳氢氧原子的物质的量之比为15:20:4
C. S-诱抗素的摩尔质量为264g/mol
D. 1 mol该分子中含有的氢原子总数约为1.204×1024
A.医疗上用氢氧化镁治疗胃酸过多:Mg(OH)2+HCl=MgCl2+H2O |
B.正常雨水的值约为⒌6的原因:CO2+H2O=H2CO3 |
C.证明铁是金属活动性顺序表中氢之前的金属:2Fe + 6HCl=2 FeCl3+ 3 H2↑ |
D.发射火箭时用液氢作燃料:2 H2+ O2=2H2O |
2.选择题- (共14题)
⑴ {#blank#}1{#/blank#}
⑵ {#blank#}2{#/blank#}
⑶ {#blank#}3{#/blank#}
⑷ {#blank#}4{#/blank#}
⑸ {#blank#}5{#/blank#}
Hello! I'm Victor.I have a bed, a desk, two chairs and a computer in my bedroom.My bed is small but very nice.It's blue because I like blue very much.My desk is big.It's white.You can see a computer and so many books on it.I do my homework here.I have two chairs.One is big and one is small.The big one is near the bed.The small one is near the window.I like my room.
Hello! I'm Victor.I have a bed, a desk, two chairs and a computer in my bedroom.My bed is small but very nice.It's blue because I like blue very much.My desk is big.It's white.You can see a computer and so many books on it.I do my homework here.I have two chairs.One is big and one is small.The big one is near the bed.The small one is near the window.I like my room.
⑴{#blank#}1{#/blank#} Where are my glasses, Mum?
⑵{#blank#}2{#/blank#} Are they in your bedroom?
⑶{#blank#}3{#/blank#} Is your sister in her bedroom?
⑷{#blank#}4{#/blank#} Who's in the living room?
⑸{#blank#}5{#/blank#} What can you see in Zoom's room?
A.No,they aren't.They are in the kitchen.
B.I can see a bed,a desk and a big sofa.
C.They are on the fridge.
D.My father and my mother are in the living room.
E.Yes,she is.She is in her bed now.)
⑴{#blank#}1{#/blank#} Where are my glasses, Mum?
⑵{#blank#}2{#/blank#} Are they in your bedroom?
⑶{#blank#}3{#/blank#} Is your sister in her bedroom?
⑷{#blank#}4{#/blank#} Who's in the living room?
⑸{#blank#}5{#/blank#} What can you see in Zoom's room?
A.No,they aren't.They are in the kitchen.
B.I can see a bed,a desk and a big sofa.
C.They are on the fridge.
D.My father and my mother are in the living room.
E.Yes,she is.She is in her bed now.)
⑴{#blank#}1{#/blank#} Where are my glasses, Mum?
⑵{#blank#}2{#/blank#} Are they in your bedroom?
⑶{#blank#}3{#/blank#} Is your sister in her bedroom?
⑷{#blank#}4{#/blank#} Who's in the living room?
⑸{#blank#}5{#/blank#} What can you see in Zoom's room?
A.No,they aren't.They are in the kitchen.
B.I can see a bed,a desk and a big sofa.
C.They are on the fridge.
D.My father and my mother are in the living room.
E.Yes,she is.She is in her bed now.)
3.填空题- (共4题)
①地壳中含量最多的金属元素的符号是________。
②“促进低碳经济”,警示温室效应对人类的危害。引起温室效应的主要气体是____。
③活性炭作为家用冰箱除味剂,是因为它具有__________作用。
④草木灰的主要成分是__________(填化学式),它的类别属于_____(填“酸”“碱”“盐”), 如果将草木灰的主要成分放在火上灼烧,透过钴玻璃火焰呈_______色。

(1)有标号仪器的名称:① ;② 。
(2)若用上述装置制取二氧化碳,则A中发生反应的化学方程式为 。要制取和收集一瓶干燥的二氧化碳气体,其装置接口的连接顺序是(用接口字母顺序从左至右连接) 。检验二氧化碳是否集满的方法是 。结果发现小木条始终不灭,出现这种情况的原因可能是 (写出其中1种)。
(3)A改成启普发生器制取二氧化碳会更好,启普发生器优点是 。

① 20℃时,KNO3的溶解度是 g/100g水。
② 两种物质溶解度的变化受温度影响较小的是 。
③ 20℃时,将40gNaCl固体投入到100g水中,得到的NaCl是 (填“饱和”或“不饱和”)溶液,此时溶液中溶质质量分数是 (保留到0.1%)。
④ 除去KNO3固体中混有的少量NaCl,提纯的步骤是:
加水溶解、蒸发浓缩、 ,然后过滤、洗涤、干燥。
⑤ 把KNO3不饱和溶液变为饱和溶液,下列有关说法正确的是 (填序号,)
|

① 该实验是将 (填“稀盐酸”或“氢氧化钠溶液”)滴加到另一种溶液中。
② A点溶液中的溶质为 。
③ 要测出反应过程中溶液的PH,应如何操作 。
4.实验题- (共2题)
个实验:(Ⅰ)将铁片浸入稀硫酸中;(Ⅱ)将银片浸入稀硫酸中;(Ⅲ)将铁片浸入硫酸铜溶液中。
实验(Ⅲ)中反应的化学方程式为 ;该反应的基本类型为 反应
上述三个实验还不能完全证明三种金属的活动性顺序,请你补充一个实验来达到实验目的(写出实验操作和现象) 。根据以上探究,三种金属的活动性由强到弱的顺序是 。
① 实验一:

请回答下列问题:
(Ⅰ)操作A中用到玻璃棒,其作用是 。
(Ⅱ)甲同学取少量(碳酸钠样品)溶液,滴入无色酚酞试液,溶液由无色变成 。
(Ⅲ)在实验过程中加入饱和石灰水后发生反应的化学方程式是 。
(Ⅳ)为探究上述反应后滤液中的溶质成分,乙同学向滤液中滴加过量稀盐酸,发现
有气泡产生,则滴加盐酸前滤液中的溶质除氯化钠外还有 。
② 实验二:
丙同学取12g该碳酸钠样品放入烧杯中,加入100g稀盐酸(足量),完全反应后,所
得溶液质量为107.6 g。试计算:
(Ⅰ)生成二氧化碳物质的量为 mol。
(Ⅱ)碳酸钠样品中Na2CO3的质量分数。(写出计算过程,保留到0.1%)
(Ⅲ)如果测得的结果比实际的质量分数高,可能的原因是 。(答一种即可)
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【1】题量占比
单选题:(12道)
选择题:(14道)
填空题:(4道)
实验题:(2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:6
7星难题:0
8星难题:7
9星难题:4