1.计算题- (共2题)

(1)根据图象,恰好完全反应后生成氢气的质量。
(2)样品中锌的质量分数是多少?(写出计算过程)
2.简答题- (共2题)

(1)你学过的含碳单质有金刚石、石墨和足球烯,它们物理性质差异很大,原因是_____
(2)转化①和②都可以时碳与氧气反应,生成物不同的主要原因是_____
(3)转化③常用于冶炼工业,工业上用赤铁矿炼铁时,反应的化学方程式为_____
(4)二氧化碳使紫色石蕊试液变红涉及的反应是如图所示转化中_____(填序号),写出反应⑤的化学方程式_____
(5)转化⑥可用于实验室制取二氧化碳,其反应的化学方程式是_____.
(1)硬水属于_____(填“纯净物”或“混合物”),生活中常用_____方法降低水的硬度.
(2)环境保护是十九大的热点话题,下列说法错误的是_____
A.使用无磷洗衣粉预防水体富营养化 | B.淘汰黄标车减少汽车尾气污染 |
C.深埋废旧电池减少重金属污染 | D.使用低毒、低残留农药减轻环境污染 |
(4)生活中,我们常常将煤加工成蜂窝煤状,这样做的好处是_____
(5)写出铁锅常用的一种防锈措施_____.
3.科学探究题- (共1题)

(1)实验1中,将大小相同的滤纸片和乒乓球碎片放在薄铜片的两侧,加热铜片的中部,观察现象_____(填“滤纸碎片”或“乒乓球碎片”)先燃烧.通过此实验,可说明燃烧的条件之一的是_____(填序号).
A.可燃物 B.空气 C.温度达到着火点
(2)实验1是用酒精作燃料燃烧提供热量来完成的,请你写出酒精在空气中燃烧的化学方程式_____
(3)实验2中,把干燥的紫色纸花和湿润的紫色石蕊纸花分别伸入两瓶干燥的二氧化碳气体中,下列有关说法正确的是_____(填序号).
A.CO2与水发生了反应 B.水具有酸性
C.干燥的紫色石蕊纸花变红 D.湿润的紫色石蕊纸花变红
(4)实验3是探究铁钉条件的实验,会出现明显现象的是试管_____(填序号),说明铁生锈实际上是铁与_____发生反应.
4.单选题- (共16题)
A.氨气液化是物理变化 | B.NH3中氮元素化合价为+3 |
C.该反应属于置换反应 | D.a、b、c、d分别为4、3、2、6 |
物质 | 甲 | 乙 | 丙 | 丁 |
反应前的质量/g | 30 | 12 | 3 | 5 |
反应后的质量/g | 6 | 27 | 12 | a |
A.表中“a”值为10 | B.丁一定是该反应的催化剂 |
C.该反应为分解反应 | D.反应中乙、丙变化的质量比为9:4 |
A.NH4NO3中氮元素的化合价相同![]() |
B.三种微粒的最外层电子数相同,化学性质相似 |
C.O2和CO2中都含有氧分子 |
D.H2O和H2中数字“2”均表示每个分子中含有的氢原子个数 |
A.乙硫醇是由碳、氢、硫三种元素组成 |
B.乙硫醇中C、H、S三种元素的质量比为12:3:16 |
C.乙硫醇中碳元素的质量分数最大 |
D.1个乙硫醇分子中含有2个碳原子、6个氢原子、1个硫原子 |
A. 红磷在氧气中能燃烧,在空气中不能燃烧
B. 硫在氧气中燃烧后生成有刺激性气味的气体
C. 镁条在氧气中燃烧时,火星四射,生成黑色固体
D. 木炭伸入盛有氧气的集气瓶中剧烈燃烧,发出白光
A.与C60是同一物质 | B.属于新型的化合物 |
C.硬度小于金刚石 | D.在氧气中燃烧可能生成CO2、CO或二者的混合物 |
①三种物质都含有碳元素,都具有还原性
②CO、CO2都是没有颜色、没有气味的气体
③CO2可用于光合作用,CO可用于人工降雨
④CO2排放过多会导致温室效应,CO易引起中毒
⑤CO2可用来灭火,CO可用作燃料.
A. ①②③ B. ②③④ C. ②④⑤ D. ①③⑤

A.金属活动性甲>乙 | B.相对原子质量甲>乙 |
C.反应硫酸的质量甲>乙 | D.消耗金属的质量甲>乙 |
①一定有锌 ②一定有铁 ③一定有铜 ④可能有锌 ⑤可能有铁 ⑥可能有铜.
A.①②③ | B.③④⑤ | C.②③④ | D.①② |
A.电解水得到的氢气和氧气的体积比为1:2(相同温度和压强下) |
B.水在自然界不断循环,取之不尽,用之不竭 |
C.保持水化学性质的最小微粒是氢原子和氧原子 |
D.净化水的方法中,蒸馏是单一净化程度最高的 |

A.实验Ⅰ中蜡烛熄灭、实验Ⅱ中蜡烛不熄灭,说明隔绝空气可以灭火 |
B.通过上述实验能得出,灭火原理包括隔绝氧气、降低温度、隔离可燃物 |
C.实验Ⅲ中蜡烛熄灭,因为稀盐酸与小苏打反应生成二氧化碳隔绝了空气 |
D.实验Ⅳ中蜡烛熄灭,说明二氧化碳的密度比空气大且不能燃烧不支持燃烧 |
A.家用电器着火时,应立即用水浇灭 |
B.煤气泄漏时,应立即关闭阀门,开窗通风 |
C.洒出的酒精正桌上燃烧时,应立即用湿抹布扑盖 |
D.发生火灾时,应立即拨打119火警电话,并采取必要的自救措施 |
5.选择题- (共1题)
The Internet nowadays opens a wide world to people, including teenagers, but many parents worry that their children may meet with something unhealthy when searching online. In order to solve this problem, a new search engine for children called Kiddle has appeared.
Search results are filtered(过滤),so only safe website are shown and descriptions are written in simple language. Searches with bad words are shut off, too.
Kiddles uses the same colors as Google in its logo and a similar design on its homepage, too—with an extra robot picture.
The top three Kiddle search results show safe websites and pages written specially for kids, and those websites and pages are well chosen and checked by Kiddle developers.
The fourth to seventh results will be safe and trusted websites that are not written specially for kids, but have content written in a simple way. These results are also chosen and checked.
Results on the eighth and owwards pages are safe and famous websites that are written for adults. They provide expert content, but are harder for kids to understand.
Unlike on Google, most results appear along with large thumbnail pictures(缩略图)to make it easier for children to find what they are looking for. For example, when searching for "meow meow". Google produces pages for information about a drug(毒品)that has "meow meow" as its nickname(绰号),but Kiddle lists information only about cats, even with some cartoon pictures.
The company explained, "Websites which appear in Kiddle search results satisfy family-friendly requirements, as we filter websites with unhealthy content."
Kiddle—a Child-Friendly Search Engine | ||
Characteristics | Only safe websites are shown. Descriptions are written in simple language. {#blank#}1{#/blank#} bad words appear. | |
Logo | It uses the same colors as Google with a robot picture. | |
Content | The top three search results | Websites and pages are written {#blank#}2{#/blank#} for kids, after being well chosen and checked. |
The fourth to seventh results | Websites are also worth {#blank#}3{#/blank#} and have content written in a simple way. | |
The eighth and onwards results | Websites are safe and famous, written for adults, and they are not {#blank#}4{#/blank#} for kids to understand. | |
{#blank#}5{#/blank#} from Google | Kiddle has many thumbnail pictures. Kiddle only gives safe information. | |
Advantage | Kiddle satisfies family-friendly requirements. |
6.填空题- (共2题)
7.实验题- (共2题)

(1)如图仪器a的名称是_____
(2)实验室里用大理石和稀盐酸制取二氧化碳,选用的发生装置是_____(填序号)
(3)实验室用B装置制取氧气,其反应的化学方程式是_____
(4)用装置D收集氧气,下列实验操作不正确的是_____(填序号)
a.加热前,将集气瓶装满水,用玻璃片盖住瓶口,倒立在盛水的水槽中
b.加热后,观察到水中导管口开始有气泡时,立即收集气体
c.待集气瓶里的水排完后,在水面下用玻璃片盖住瓶口,移出水槽正放在桌面上.
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【1】题量占比
计算题:(2道)
简答题:(2道)
科学探究题:(1道)
单选题:(16道)
选择题:(1道)
填空题:(2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:3
5星难题:0
6星难题:18
7星难题:0
8星难题:3
9星难题:1