1.单选题- (共14题)

A.红磷燃烧产生大量白色烟雾 |
B.燃烧匙中的红磷可以换成细铁丝 |
C.该实验可说明N2难溶于水 |
D.红磷的量不足会导致进入集气瓶中水的体积大于1/5 |
A. 空气中氧气主要来自植物的光合作用
B. 空气中分离出的氮气可用于食品防腐剂
C. 空气中二氧化碳含量上升不会影响地球环境
D. 空气中敞口放置的饼干变软是因为空气中含有水蒸气
A.在点燃的条件下,细铁丝在氧气中剧烈燃烧,火星四射,生成黑色的三氧化二铁 |
B.在点燃的条件下,硫在氧气里燃烧,发出蓝紫色火焰,生成无色无味的气体 |
C.铁、硫、蜡烛在氧气中的燃烧都是化合反应 |
D.物质与氧发生的反应属于氧化反应,氧气具有氧化性 |
A.在试管口放一团棉花,防止高锰酸钾粉末进入导管 |
B.把试管口略向下倾斜固定在铁架台上 |
C.导管口开始有气泡放出时就立即收集,防止生成的气体跑掉 |
D.用高锰酸钾制取所需氧气停止加热时,先要把导管移出水面,然后再熄灭酒精灯 |
A.⑤⑦③②①④⑥ | B.①⑦③②⑤④⑥ | C.⑦②③①④⑤⑥ | D.⑦③①②④⑥⑤ |
A.合理开发洁净能源 |
B.全面关停化工企业 |
C.改进汽车尾气净化技术 |
D.研发易降解的生物农药和塑料 |
A.用酒精灯加热试管里的液体时,试管里的液体不应超过试管溶剂的1/2 |
B.实验后剩余的药品应放回原试剂瓶中,避免浪费 |
C.洗过的玻璃仪器内壁附着的水滴既不聚成水滴,也不成股流下时,表明仪器已洗干净 |
D.不小心碰倒酒精灯,洒出的酒精在桌上燃烧起来时,应立即用水扑灭 |
A.向试管中滴加液体时,滴管应垂悬在试管口上方,并不接触试管 |
B.实验用剩的药品应放回原试剂瓶中 |
C.加热后的试管应立即用冷水冲洗 |
D.为了便于观察,给试管里的液体加热时试管口应对着自己 |
2.选择题- (共1题)
阅读理解
Green is an important color in nature. It is the color of grass and the leaves on trees. It is also the color of most growing plants.
Sometimes, the word green means young, fresh and growing. Sometimes, it describes something that is not yet ripe or finished. For example, a greenhorn is someone who has no experience, who is new to a situation. In the fifteenth century, a greenhorn was a young cow or ox whose horns(角) had not yet developed. A century later, a greenhorn was a soldier who had not yet had any experience in battle. By the eighteenth century, a greenhorn had the meaning it has today—a person who is new in a job.
Someone who has the ability to grow plants well is said to have a green thumb. The expression comes from early nineteen hundreds. A person with a green thumb seems to have a magic touch that makes plants grow quickly and well. You might say that the woman next door has a green thumb if her garden continues to grow long after your plants have died.
The Green Revolution is the name given some years ago to the development of new kinds of rice and other grains. The new plants produced much larger crops. The Green Revolution was the result of hard work by agricultural scientists who had green thumbs.
Green is also the color used to describe the powerful feeling, jealousy(嫉妒). The green-eyed monster is not a frightening creature from outer space. It is an expression used about four hundred years ago by British writer William Shakespeare in his play “Othello”. It describes the unpleasant feeling a person has when someone has something he wants. A young man may suffer from the green-eyed monster if his girlfriend begins going out with someone else. Or, that green-eyed monster may affect your friend if you get a pay rise and he does not.
3.填空题- (共3题)
①小白鼠在装有空气的密闭容器中可存活一段时间,说明空气中含有_______
②石灰水长期露置在空气中会出现白色固体物质,说明空气中含有________
③夏天,盛放冰棒的杯子外壁上附有一层水珠,说明空气中含有________
(2)已知空气中氧气的体积分数为21%,小兰同学用右图装置进行验证,实验后发现测得的氧气体积分数小于1/5,请你帮她分析造成这种结果的可能原因(至少答两点):______

红磷燃烧的现象是__________
集气瓶内剩余气体的性质是:
1.___________________________________
2.___________________________________
(1)请从下列常见仪器图示中,1-5题选择恰当的字母序号填空。

①可以直接在酒精灯火焰上加热的玻璃仪器是_______;
②镁条燃烧时,用来夹持镁条的仪器是______;
③用酒精灯加热时需要垫上石棉网的仪器是________;
④取用粉末状固体药品用到的仪器是________;
⑤吸取和滴加少量液体试剂的仪器是_________;
(2)量筒读数时视线的要求:_____________________________
(3)试管洗刷干净的标准:_______________________________
⑴贝贝取一支蜡烛,用小刀切下一小块,把它放入水中,蜡烛浮在水面上。结论:石蜡的密度比水 ;
⑵芳芳点燃蜡烛,观察到火焰分为外焰、内焰、焰心三层。把一根火柴梗放在火焰中(如图)约1s后取出可以看到火柴梗的 (填“a”、“b”或“c”)处最先碳化。结论:蜡烛火焰的 温度最高;

⑶婷婷在探究蜡烛燃烧的过程中,发现罩在火焰上方的烧杯内壁被熏黑,你认为她的以下做法中不合适的是( )
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4.实验题- (共1题)

(1)指出仪器名称:①_______________ ②_______________。
(2)若用高锰酸钾制取氧气,应选用的的发生装置是________(填字母)。你认为该装置中还缺少_____________。写出该反应的文字表达式______________________________。
(3)若用过氧化氢制取氧气,还需要用到药品_____________(填名称),其起____________作用,能否用高锰酸钾制取氧气后的剩余物代替该物质_________(填“能”或“否”)。
(4)用集气瓶收集氧气,验满的方法是____________________________,若用F装置收集该气体,则气体从______端进入(填“c”或“d”)
(5)使用高锰酸钾制取氧气时,水槽中的水变成了红色为什么:___________________。
(6)硫燃烧实验集气瓶底部留有少量水的目的:________________________________。
硫燃烧的文字表达式:___________________ 。
(7)铁丝在氧气中燃烧的现象:______________________________________________。
为什么需要将铁丝盘成螺旋状:________________________________________________。
铁丝燃烧实验底部留有少量水的目的:___________________________________________。
(8)高锰酸钾制取氧气,收集到的氧气不纯净的原因,说两条:
①__________________________________________________________ ;
②___________________________________________________________ ;
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【1】题量占比
单选题:(14道)
选择题:(1道)
填空题:(3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:0
5星难题:0
6星难题:2
7星难题:0
8星难题:10
9星难题:6