1.计算题- (共1题)
(2)反应后溶液中溶质的质量分数是多少?___________
2.单选题- (共8题)
A | B | C | D |
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向一定量稀盐酸中加水稀释 | 一定温度下,不饱和氯化钠溶液中加入氯化钠 | 向一定质量表面生锈的铁片中滴加盐酸至过量 | 用等质量、等浓度的双氧水分别制取氧气 |

A. 该元素是金属元素
B. 该元素的原子序数为 20
C. 该元素的相对原子质量是40.08
D. 该元素是生物细胞中含量最多的金属元素
A.生石灰与烧碱溶于水都有热量放出,不能用加水的方法鉴别二者 |
B.溶质在溶解的过程中,有的放出热量,有的吸收热量 |
C.常温下KNO3、Ca(OH)2的饱和溶液降温后仍是饱和溶液 |
D.将NaCl、蔗糖溶于水后,溶质均以离子形式存在 |
A.焚烧塑料以消除“白色污染” |
B.深埋含镉、汞的废旧电池 |
C.C3H4+2H2+2CO![]() |
D.2KMnO4![]() |
A.使用加入铁强化剂的酱油有助于防治缺铁性贫血 |
B.喝豆浆能补充蛋白质 |
C.维生素在人体中需要量很少,它不属于人体的营养素 |
D.制作插座的塑料具有热固性 |
A.一定有碳酸钠 | B.一定有碳酸钙 |
C.可能有氢氧化钠 | D.可能有氢氧化钙 |
3.选择题- (共7题)
John gets up early from Monday to Saturday, because he must go to school before 7:30 on weekdays and go to the Drawing Club at 8:00 on Saturday mornings. He usually goes to the bookshop on Saturday afternoons, and after supper he watches TV until(直到) midnight.
He doesn’t get up early on Sundays. He often gets up at 10 a.m. And he always watches TV after he gets up. John’s parents both work on Sundays, so he usually goes to KFC to have a hamburger and some juice for lunch. After that, he goes back home and starts to play computer games until his parents come back. He does his homework after supper. He usually has lots of weekend homework, so he must spend three hours on it. He usually goes to bed at about 11:00 on Sunday evenings. He often complains (抱怨) he has too much homework to do.
4.填空题- (共2题)

(1) ℃时,甲、乙两种物质的溶解度相等。
(2)t2℃时,将等质量的甲、乙两种物质加水溶解配制成饱和溶液,所得溶液质量的大小关系为:
甲 乙(填“>”、“<”或“=”)。
(3)把乙物质的不饱和溶液变为饱和溶液,下列有关说法正确的是 (填序号)
A.溶质的质量可能不变 B.溶剂的质量一定变小
C.溶质的质量分数一定变大 D.溶液的质量一定变大
(4)通常情况下,在实验室用固体甲配制一定溶质质量分数的甲溶液,需用到的仪器有:托盘天平(带珐码盒)、烧杯和___________(填序号)。
A.酒精灯;B .药匙;C.玻璃棒;D.漏斗;E.铁架台;F.量筒;G 胶头滴管
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【1】题量占比
计算题:(1道)
单选题:(8道)
选择题:(7道)
填空题:(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:0
5星难题:0
6星难题:4
7星难题:0
8星难题:4
9星难题:3