1.流程题- (共1题)

请回答下列问题:
(1)试剂A的化学式 ,若在实验室中进行该实验,操作1和操作2的名称是 ,该实验中玻璃棒的作用 。
(2)该工艺中生成碳酸钡固体的反应方程式为:BaCl2 + +2KOH=BaCO3+ + ,请完成并配平该方程式。
(3)操作3为洗涤、检验和 ,洗涤的作用是 ,检验洗涤是否干净可选用试剂 (写化学式)。
(4)上述流程中可循环利用的物质是 ,该流程中的副产物可用作 (写一种用途)。
2.单选题- (共13题)
A.两者均为物理变化 |
B.前者是物理变化后者是化学变化 |
C.两者均为化学变化 |
D.前者是化学变化后者是物理变化 |

根据以上实验操作与现象,该同学得出的结论不正确的是
A.试样溶液中可能含有NaNO3和BaCl2 |
B.沉淀D的化学式为BaCO3 |
C.试样溶液中一定含有NH4NO3、MgCl2、Na2SO4 |
D.该实验中涉及的化学反应不一定是复分解反应 |
A.碳酸盐与稀盐酸反应生成气体,所以与稀盐酸反应生成气体的物质一定是碳酸盐 |
B.由同种分子构成的物质一定是纯净物,所以纯净物一定是由同种分子构成的 |
C.溶液一定是均一稳定的,但均一稳定的物质不一定是溶液 |
D.在化合物里,正负化合价的代数和为零,所以在同一化合物中金属元素显正价,则非金属元素一定都显负价 |
A.硫化丙烯的相对分子质量为74 |
B.硫化丙烯中硫元素的质量分数最大 |
C.硫化丙烯分子中碳、氢、硫元素质量比为3:6:1 |
D.硫化丙烯由3个碳原子、6个氢原子和1个硫原子构成 |

A.硝酸铵和水 | B.二氧化锰和过氧化氢溶液 |
C.氯化钠和水 | D.铜和稀盐酸 |
A.CO2能溶于水,可用于生产汽水等饮料 |
B.活性炭具有吸附性,常用于硬水软化 |
C.洗涤剂能溶解油污,可用于去除油污 |
D.化肥能提供农作物所需营养元素,应无限量增施化肥 |
A.在铁质容器中配制波尔多液 |
B.向加碘食盐溶液中滴加淀粉溶液,溶液变蓝 |
C.硫在空气中燃烧发出明亮蓝紫色火焰,生成无色无味气体 |
D.沾有氨水和浓盐酸的玻璃棒靠近时会产生白烟 |
序号 | 物质 | 选用试剂 | 操作 |
A | KNO3(NaCl) | H2O | 溶解,蒸发结晶、过滤 |
B | MnO2(KCl) | H2O | 溶解、过滤、洗涤、干燥 |
C | NaOH溶液(Na2CO3) | 稀盐酸 | 加入试剂至不再产生气泡 |
D | KNO3溶液(KOH) | Cu(NO3)2溶液 | 加入适量的试剂,直接蒸发 |
A.A | B.B | C.C | D.D |
A.用灼烧的方法区别棉花和羊毛 |
B.用水鉴别NH4NO3、NaOH、NaCl三种固体 |
C.将草木灰(含K2CO3)与氯化铵混合施用,增进肥效 |
D.按溶解、过滤、蒸发的主要操作顺序分离CaCl2、CaCO3的固体混合物 |
A.开发节水技术 | B.防治水污染 |
C.植树造林,保护植被 | D.大力开发地下水 |
3.选择题- (共3题)
Wang Fei,a Chinese student,and Mary,an American student studying Chinese in China,were in a supermarket.They saw a young man walking down the stairs.In his hurry,he missed the last two steps and fell onto the ground.He tried to stand up while people around him laughed.Luckily,he seemed to be OK.
Mary found Wang Fei smiling a little and was not happy about it. “Tell me, Fei, how could people laugh when someone fell like that? Why didn't they go up and ask him if he was hurt?”
Wang Fei said, “Because they knew he wasn't hurt too much.”
“But I still don't understand.A fall is a fall.In my culture, people would never laugh!”
This is an example.The Chinese and the westerner will think and act differently when seeing such a thing.Chinese people are used to laughing or smiling.Very often the person who is in embarrassing(困窘的)situation would also laugh or smile to get out of it.However,if someone gets hurt seriously,it will not be a laughing matter any more.People will help him or her instead.
But,in that case,a westerner will rush over and help the person get up.If a westerner falls,he or she,like a Chinese person,may try to make a joke if he or she is not hurt.If two close friends are walking together,and one falls but clearly isn't hurt,a common joke is to say “Have a nice trip”.
So different people have different habits and different countries have different cultures
Wang Fei,a Chinese student,and Mary,an American student studying Chinese in China,were in a supermarket.They saw a young man walking down the stairs.In his hurry,he missed the last two steps and fell onto the ground.He tried to stand up while people around him laughed.Luckily,he seemed to be OK.
Mary found Wang Fei smiling a little and was not happy about it. “Tell me, Fei, how could people laugh when someone fell like that? Why didn't they go up and ask him if he was hurt?”
Wang Fei said, “Because they knew he wasn't hurt too much.”
“But I still don't understand.A fall is a fall.In my culture, people would never laugh!”
This is an example.The Chinese and the westerner will think and act differently when seeing such a thing.Chinese people are used to laughing or smiling.Very often the person who is in embarrassing(困窘的)situation would also laugh or smile to get out of it.However,if someone gets hurt seriously,it will not be a laughing matter any more.People will help him or her instead.
But,in that case,a westerner will rush over and help the person get up.If a westerner falls,he or she,like a Chinese person,may try to make a joke if he or she is not hurt.If two close friends are walking together,and one falls but clearly isn't hurt,a common joke is to say “Have a nice trip”.
So different people have different habits and different countries have different cultures
4.多选题- (共1题)

A.t2℃时,a,b,c三种物质的溶解度由大到小的顺序是a>b>c |
B.t2℃时,将50g a物质放入100g水中充分溶解得到a的饱和溶液(a物质不含结晶水) |
C.将t2℃时 a,b,c三种物质的饱和溶液降温至t1℃时,所得溶液溶质质量分数关系是b>a=c |
D.将c的饱和溶液变为不饱和溶液,可采用升温的方法 |
5.填空题- (共2题)
(1)人胃液中含有的酸
(2)改良酸性土壤的碱
(3)焙制糕点所用发酵粉中含有的盐
(4)侯氏制碱法的主要产品
(5)生活中常用作调味品、防腐剂的盐
(6)常作为建筑材料的盐
6.实验题- (共1题)
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【1】题量占比
流程题:(1道)
单选题:(13道)
选择题:(3道)
多选题:(1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:1
5星难题:0
6星难题:10
7星难题:0
8星难题:7
9星难题:0