1.计算题- (共1题)
(2)若铁矿石选用赤铁矿(主要成分是氧化铁),表示炼铁原理的化学方程式为 。
(3)要炼出含铁96%的生铁4000t,至少需要含氧化铁80%的赤铁矿石的质量是多少?
(请写出详细的计算过程,结果保留一位小数)
2.单选题- (共9题)
A.O2:可表示一个氧气分子中有2个氧原子. |
B.2C:可表示两个碳原子 |
C.S2-:可表示一个硫离子带2个单位负电荷 |
D.NH3:可判断出该物质中N、H元素的个数比为1:3 |
A.常温下金属都是固体 |
B.金属都是以化合物形式存在于自然界中 |
C.生铁和钢都是铁的合金,其中生铁的含碳量大于钢 |
D.铝在常温下就能与氧气反应,所以铝制品很容易锈蚀 |

A.C的溶解度随着温度的升高而减小
B.在t2℃时,A的溶解度等于B的溶解度
C.要从含有少量A的B溶液中得到较多的B晶体,通常可采用降温结晶的方法
D.t1℃时,120g C的饱和溶液中含有20 gC
A.能清除可燃物 | B.使可燃物与氧气隔绝 |
C.降低可燃物的着火点 | D.使可燃物的温度降低到着火点以下 |
A.12% | B.44% | C.56% | D.88% |
3.选择题- (共9题)
根据短文内容, 选择正确答案。
Hi. I'm Liu Ying. This is my school. It's big and beautiful. There are twenty classes in my school. There are nine hundred(百) students in my school. There are four beautiful gardens in it. There is a building in my school. On the first(第一) floor, there are two offices and a hall. There are six classrooms on the first floor too. On the second floor, there are fourteen classrooms and two toilets. There is a big library and some reading rooms in my school too. I like my school very much.
根据短文内容,选择正确的答案。
Alice, 35
I like shopping, but shopping with young children is not an easy thing. I have to look after them while I'm shopping. Shopping with my husband is not fun, either(也). I only go shopping with my husband when I need to buy something for him. If I look at a dress for myself, he says something like “The dress is too big” or “You don't need to buy that now”. I often go shopping with my friends. It's fun. I like shopping alone(单独) too.
Maria, 26
I like shopping very much, but I never go shopping at weekends. There are too many people in the shops. I don't like shopping with other people. It usually takes me a lot of time to choose things because I never buy the first things I see. I always look around other shops to find the best price. I'm good at finding the best deals(商品). I don't like buying food in small shops and street markets(市场). I think food in the supermarket is fresher and cheaper, so I shop there.
根据短文内容,选择正确的答案。
Alice, 35
I like shopping, but shopping with young children is not an easy thing. I have to look after them while I'm shopping. Shopping with my husband is not fun, either(也). I only go shopping with my husband when I need to buy something for him. If I look at a dress for myself, he says something like “The dress is too big” or “You don't need to buy that now”. I often go shopping with my friends. It's fun. I like shopping alone(单独) too.
Maria, 26
I like shopping very much, but I never go shopping at weekends. There are too many people in the shops. I don't like shopping with other people. It usually takes me a lot of time to choose things because I never buy the first things I see. I always look around other shops to find the best price. I'm good at finding the best deals(商品). I don't like buying food in small shops and street markets(市场). I think food in the supermarket is fresher and cheaper, so I shop there.
一个人的成长过程,是从自然之人向社会之人过渡的过程,是社会化的过程。在这一过程中,“以文化之”起到很大作用,但是结果于个人、于社会却是大不相同甚至大相径庭的。“以文化之”对个人影响不同的原因是( )
4.多选题- (共1题)
A. 该物质由碳、氢两种元素组成
B. 该物质由碳、氢、氧三种元素组成
C. 该物质中碳元素与氢元素的质量比为4︰1
D. 该物质的分子中碳原子与氢原子的个数比为1︰2
5.填空题- (共5题)
(1)能用于制造电线的是 。(2)最常用的溶剂是 。
(3)能结合血红蛋白使人中毒的是 。(4)能用于人工降雨的是 。
(1)降雨是自然界中水循环的一个环节。 、 或这些气体在空气中反应后的生成物溶于雨水,会形成酸雨。
(2)请按要求写出水作为反应物的化学方程式:
①分解反应: ;
②化合反应: 。
(3)下表提供了在一定条件下,水能否与一些金属发生反应的信息。
①根据金属活动性顺序和表中的已知信息推断,镁与水蒸气 反应(选填“能”或“不能”);
物质 | 钠与冷水 | 镁与冷水 | 镁与水蒸气 | 铁与冷水 | 铁与水蒸气 |
能否发 生反应 | 剧烈反应 | 缓慢反应 | ? | 不反应 | 加热条件 下能反应 |
,所属基本反应类型是 反应;
③铁虽然常温下与水不反应,但铁制品在潮湿的环境中容易生锈。
某同学进行了如图所示实验,一周以后发现铁钉表面锈蚀。图中a、b、c三处锈蚀情况最严重的是 (选填字母),产生该现象的原因是 。

温度/℃ | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 |
溶解度/g | 36 | 35 | 34 | 33 | 32 | 31 | 30 | 29 | 28 | 27 |
②通过对上表数据的分析,物质A的溶解度曲线应是图中的 (选填“甲”或“乙”)。

(2)下列条件下,二氧化碳在水中溶解度最大的是 (选填字母)。
A.1×101 kPa、20 ℃ B.2×101 kPa、10 ℃
C.2×101 kPa、20 ℃ D.1×101 kPa、10 ℃
(1)石油经过加热分馏,得到石油气、汽油、煤油、柴油、润滑油、石蜡等产品,该过程属于 变化(选填“物理”或“化学”,下同);将煤隔绝空气加热到上千摄氏度,得到焦炉煤气、粗氨水、焦炭和煤焦油,该过程属于 变化。
(2)相同条件下,气体体积比等于分子数比。现有一套以液化石油气(主要成分为C4H10)为燃料的灶具,若要改为以天然气为燃料的灶具,应采取的措施是 (选填字母)。
A.燃料气和空气的进入量都减小 | B.燃料气和空气的进入量都增大 |
C.增大燃料气进入量或减小空气进入量 | D.减小燃料气进入量或增大空气进入量 |
(4)下图所示为一种“节能减排”的有效措施。乙醇属于 能源(选填“可再生”或“不可再生”),完全燃烧的化学方程式是 。

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【1】题量占比
计算题:(1道)
单选题:(9道)
选择题:(9道)
多选题:(1道)
填空题:(5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:2
5星难题:0
6星难题:10
7星难题:0
8星难题:2
9星难题:2