1.计算题- (共1题)
(1)计算该大理石中碳酸钙的质量分数。
(2)将40g质量分数为36.5%的盐酸稀释为质量分数为10%的盐酸,需要水的质量是多少?
2.单选题- (共5题)
A.置换反应 | B.分解反应 | C.化合反应 | D.复分解反应 |
A.原子和分子均是微观粒子,在化学变化中原子不能再分,则分子也不能再分 |
B.碱能跟非金属氧化物反应,则碱溶液一定能吸收二氧化碳、二氧化硫和一氧化碳气体 |
C.物质都是由元素组成的,同种元素可以组成纯净物,则不同种元素也可以组成纯净物 |
D.中和反应生成盐和水,则生成盐和水的反应一定是中和反应 |
A. NaClO中氯元素的化合价为﹣1价
B. NaClO是一种钠盐
C. NaClO由三种元素组成
D. NaClO中Na、Cl、O的原子个数比为1:1:1
3.选择题- (共4题)
如图所示,一带负电的质点在固定的正的点电荷作用下绕该正电荷做匀速圆周运动,周期为T0,轨道平面位于纸面内,质点的速度方向如图中箭头所示.现加一垂直于轨道平面的匀强磁场,已知轨道半径并不因此而改变,则( )
如图所示,两平行光滑导轨相距0.2m,与水平面夹角为300,金属棒MN的质量为0.2kg,金属棒的电阻R=1Ω,其处在与轨道平面垂直且磁感应强度为5T的匀强磁场中,电源电动势为5V,内阻为1Ω,为使MN处于静止状态,则电阻R1应为多少?(其他电阻不计)
根据短文理解,选择正确答案。
A telescope, called Gaia, is being designed by astronomers in Europe, and it couldn't be more different from Pan-STARRS, which is another telescope being designed. While Pan-STARRS will be looking for asteroids (小行星) and comets headed for Earth, Gaia will be looking at our entire galaxy (银河系).
Gaia is designed to draw a map of the Milky Way, our home galaxy. Just as a map of your town gives you a picture of where things are located, Gaia's map of the galaxy will tell astronomers where the stars are. Over five years, Gaia will observe (观察) about a billion stars and other objects in our galaxy. Each object will be observed about 70 times.
Gaia will be sent into space connected to a rocket. It contains two telescopes, each focused at a different angle (角度). These two telescopes act like Gaia's “eyes”. The reason why humans can see things in 3D is that we have two eyes focused on the same object, at slightly different angles. By using two telescopes like eyes, Gaia can produce the first 3D map of the positions of the stars it views.
Gaia, which is to be sent into space, will be a powerful telescope. If you were to use it on Earth, for example, you could stand 600 miles away from your best friends and still get a clear picture of their hair.
Gaia is one of more than a dozen telescopes being designed by scientists right now. The next generation of telescopes will reveal new parts of our universe that will seem surprising. The universe, with all its planets, stars and other strange objects, is a puzzle with pieces that we can see by using powerful telescopes.
4.填空题- (共3题)
(1)烫发用的定型剂主要成分是溴酸钠(NaBrO3),对皮肤有刺激作用,使用不当会引起皮炎.溴酸钠中溴元素的化合价为_______.
(2)某微粒结构示意图为

(3)新鲜的蔬菜水果中含有的营养素主要是_______________和水.
(4)用洗洁精洗去餐具上的油污属于____________________现象.
(5)每年的6月26日是世界禁毒日,今年的主题是“珍惜生命,远离毒品,预防艾滋病”,下列几种物质中①海洛因 ②甲醛 ③摇头丸 ④黄曲霉毒素⑤冰毒,属于毒品的是________________(填序号)
(6)现有30℃的不饱和KNO3溶液,与该溶液有关的量有:①水的质量;②溶液中溶质KNO3的质量;③KNO3的质量分数;④30℃时KNO3的溶解度;⑤溶液的质量.用序号填空:
Ⅰ.在该不饱和溶液中加少量硝酸钾至饱和,不变的量有______________
Ⅱ.将该不饱和溶液恒温蒸发至饱和,不变的量有______________.
(1)取少量白色粉末,向其中加入足量的水,充分搅拌后过滤,得到白色沉淀和无色滤液。则原白色粉末中一定不含有____________。
(2)取实验(1)滤出的白以沉淀,向其中加入足量的盐酸,沉淀全部溶解,并产生无色气体。则原白色粉末中一定含有____________。
根据上述实验可推断:原白色粉末的组成有_________种可能。
为进一步探究原白色粉末的组成,取实验(1)得到的滤液,向其中通入二氧化碳,产生白色沉淀,则可推断原白色粉末中一定还含有______________________。
5.实验题- (共1题)

(1)仪器①的名称_______;加热高锰酸钾制取氧气应选装置_____(填字母),该反应的化学方程式为________________________________________________________________.
(2)草酸(H2C2O4)固体在浓硫酸作用下发生反应:H2C2O4═CO2↑+CO↑+H2O,若用该反应来制取CO,制气装置应选___(填字母);除去其中的CO2可选仪器A、C,C中装入的试剂最好是___(填小写字母):a.烧碱溶液b.浓硫酸c.澄清石灰水.
(3)点燃CO前应进行的操作是_______;若用CO还原氧化铜粉末,应选装置__(填字母).
(4)如图为某种“微型”实验装置.如果G处装稀盐酸,H处放少量铁屑,则加热处的现象为__________________________;“微型塑料滴管”G当于上图实验装置中的__(填字母);用微型仪器进行实验,除试剂用量极少以外,还可能具有的优点是______________________________(写一点).

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【1】题量占比
计算题:(1道)
单选题:(5道)
选择题:(4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:1
5星难题:0
6星难题:7
7星难题:0
8星难题:0
9星难题:1