1.简答题- (共1题)


(1)铁生锈实际上是铁与空气中的________(填名称)发生反应的结果。
(2)当铁丝足量,时间足够长,实验③进入试管内的水的体积约占试管体积的______________。
(3)该实验创新之处在于:可根据铁丝表面的铁锈和________两种现象来判断铁丝反应进行的情况。
2.计算题- (共2题)

(1)纯碱恰好完全反应时,生成CO2的质量为 g
(2)计算该样品中含杂质的质量分数是多少?(计算结果保留一位小数,下同)
(3)计算当盐酸与纯碱恰好完全反应时,所得溶液的溶质质量分数是多少?
3.科学探究题- (共1题)
实验一:探究氢氧化钠溶液中是哪一种粒子能使无色酚酞溶液变色
[猜想]可能是水分子、钠离子或氢氧根离子使无色酚酞溶液变色。
[实验]
(1)在第一支试管中加入约2mL蒸馏水,滴入几滴无色酚酞溶液。现象:溶液不变色;
(2)在第二支试管中加入约2mL氯化钠溶液,滴入几滴无色酚酞溶液。现象:_____;
(3)在第三支试管中加入约2mL氢氧化钠溶液,滴入几滴无色酚酞溶液。现象:_____。
[结论]________
实验二:用注射器向充满某种气体的软塑料瓶中注入一种液体(如图),振荡,发现塑料瓶变瘪,探究气体和液体可能是什么物质?

[猜想]气体和液体可能是________(写一组即可)。
[实验]用试管取少量实验后塑料瓶中的溶液,加入试剂__,产生相应的现象,其化学方程式为___。
[评价]上述实验完成后,能否验证你的猜想______,理由是__
4.推断题- (共1题)

完成下列问题:
(1)确定A、B、C、D、X各代表什么物质(用化学式表示):A________,B________,C________,D________,X________。
(2)写出下列有关反应的化学方程式:
X和B:________________________________________________________________________。
X和D:________________________________________________________________________。
5.单选题- (共18题)
A.炼铁的过程是把单质铁变成氧化铁 |
B.回收利用废旧金属耗费人力物力,不如直接丢弃 |
C.铁是地壳中含量最多的金属元素 |
D.铁制品锈蚀要及时除锈 |
A.大理开采矿物,保障金属材料的使用 |
B.推广使用太阳能、风能,缓解温室效应 |
C.采用焚烧的方法处理农作物秸秆和垃圾 |
D.生活中尽量使用含磷洗衣粉,便于给水体提供养分 |

A.乙的溶解度小于甲的溶解度 |
B.甲的溶解度受温度影响比乙大 |
C.t2℃时,100g乙的饱和溶液中含乙50g |
D.相同质量的甲、乙的饱和溶液由t2℃降至t1℃,析出晶体较多的是乙 |

A.t2℃时,在两个各盛有100g水的烧杯中,分别加入50g的甲、乙两种固体,充分搅拌,所得甲、乙溶液中溶质的质量不等 |
B.t1℃时,等质量甲、乙溶液中所含溶剂的质量甲等于乙 |
C.乙中含有少量甲,可以用冷却热饱和溶液的方法提纯甲 |
D.t2℃时,将甲、乙的饱和溶液降温至t1℃,甲溶液析出晶体的质量大于乙 |


A.保持温度不变,若在④中加入4.5 g KNO3固体可得到饱和溶液 |
B.②③⑤中溶质的质量分数相等 |
C.①③④均为不饱和溶液 |
D.④→⑤可析出53.9 g KNO3晶体 |
A.①②③ |
B.①③② |
C.②①③ |
D.③①② |
A.近期太仓某企业创新研发的绿色环保合成革成为NBA赛场第一品牌蓝球用革 |
B.高新区出土的一件国家一级文物梅子青釉陶器是南宋后期在著名的龙泉窑烧造 |
C.吴中、相城的苏派“热砖雕”砖材是采用含铁量较高的黏土经焙烧等工艺制得 |
D.园区“东方之门”的桩基是用厚钢板焊接成钢柱,再在钢柱外浇注混凝土成型 |
A.炒青菜 | B.豆腐汤 | C.红烧肉 | D.水煮鱼 |
A.利用化学方法合成药物,抑制细菌和病毒保障人体健康 |
B.积极开发使用新能源,在生产生活中提倡使用节能技术和节能用具 |
C.要防止“白色污染”,就不能使用塑料制品 |
D.在现代农业发展中要合理使用农药和化肥保护环境 |
6.选择题- (共2题)
The most important lessons in life that we need to learn are the results of our poor decisions. Although time and experience are the best teachers, we also suffer from experiences such as our sacrifices, suffering and the hardships. Good judgment develops only when we truly learn from our mistakes. However, many people keep repeating the same mistakes before learning their lessons because as they say, they are just humans who are subject to making mistakes.
Our weaknesses in life can be turned into our strengths if we immediately acknowledge and recognize the fact that we mess up and learn from them. Our good or bad experiences help us learn better judgment in life. Yet, too many people are in denial and place the blame on others without realizing that the minute they take responsibility for their action is when the learning process begins. Apart from learning from our own experience, we can also learn valuable lessons from the experience of others. It allows us to observe our behavior from another angle. When we recognize our mistakes and prevent them from happening again, we are, therefore, learning.
Quickly identifying our mistakes and changing behavior accordingly requires less time and energy than denying mistakes. However, acknowledgement of mistakes requires belief in the idea that the perfection is not possible.
It is easier to analyze our mistakes especially when we talk to others, which can help people to sort out comments or criticisms after a mistake is made. Despite our tendency to avoid mistakes, timely acknowledgement is one of the best ways to prevent them from repeating.
7.填空题- (共2题)

(1)表中“钠”是指________(填序号)。
A 离子 B 分子
C 元素 D 单质
(2)方便面中含的营养素有________种。
(3)方便面中使用的食盐可以是加碘盐,人体中缺碘可能患有的疾病是____________(填“甲状腺肿大”或“骨质疏松”)。
8.实验题- (共1题)
(1)写出两个你认为可能影响食盐在水中溶解速率的因素,并预测其食盐溶解速率的影响。
因素①:________,你的预测是_________________________________________________;
因素②:________,你的预测是_________________________________________________。
(2)从你所列因素中选出一个,通过实验验证你的预测,你设计的实验方案是____________________。
(3)要使验证实验达到预测的效果,必须控制________。
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【1】题量占比
简答题:(1道)
计算题:(2道)
科学探究题:(1道)
推断题:(1道)
单选题:(18道)
选择题:(2道)
填空题:(2道)
实验题:(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:2
5星难题:0
6星难题:10
7星难题:0
8星难题:12
9星难题:2