精英家教网 > 初中地理 > 题目详情

【题目】下列对实验现象或结论的描述中错误的是(

A.碘易溶于水

B.高锰酸钾几乎不溶于汽油

C.水和植物油混合后用力振荡可形成乳浊液

D.乙醇能与水互溶

【答案】A

【解析】A.碘不易溶于水,易溶于酒精,故A说法错误;B.高锰酸钾易溶于水但几乎不溶于汽油,故B说法正确;C.水和植物油混合后用力振荡形成的混合物不均一、不稳定,属于乳浊液,故C说法正确;D.乙醇与水能以任意比例互溶,故D说法正确.

练习册系列答案
相关习题

科目:初中地理 来源: 题型:

【题目】下表是某实验报告中的一组数据:

实验

序号

试剂1

试剂2

混合前

温度/

混合后最高或最低温度/

3.2 mL水

3.2 g Na2CO3固体

20

24.3(t1 )

35 mL稀盐酸

3.2 g Na2CO3固体

20

25.1(t2 )

35 mL水

2.5 g NaHCO3固体

20

18.5(t3 )

35 mL稀盐酸

2.5 g NaHCO3固体

20

16.2(t4)

(1)从实验数据可知:Na2CO3溶于水________热量,NaHCO3溶于水________热量(填“放出”或“吸收”)。

(2)根据t2>t1 可知Na2CO3与稀盐酸反应______热量,根据t4<t3 可知:NaHCO3与稀盐酸反应______热量(填“放出”或“吸收”)。

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】A

Tony and Anna are brother and sister. They are Americans. Tony likes sports very much. He can play football, basketball and volleyball. Anna likes music very much. She cant play ball games. But they both like playing games on computers.

They like eggs, bread and milk for breakfast. For lunch, Anna likes eating vegetables and fruit, but Tony likes chicken and fish. They both like hamburgers. But they dont like ice cream or cheese.

【1】 Anna is Tonys __________ and they are __________.

A. sister; Chinese B. sister; Americans

C. friend; Americans D. brother; Americans

【2】 Tony likes __________ and he can play __________.

A. sports; games B. music; basketball

C. sports; volleyball D. sports; tennis

【3】Tony and Anna both like __________.

A. vegetables B. football

C. playing games D. ice cream

【4】For breakfast, they like __________.

A. eggs, bread and milk B. ice cream or cheese

C. chicken and fish D. vegetables and fruit

【5】 They dont like __________ or __________.

A. ice cream; vegetables B. ice cream; cheese

C. chicken; fish D. hamburgers; cheese

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】 Whats that?

Its __________ eraser.

A. a, B. an C. / D. the

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】餐具上的油垢可以用加入洗涤剂的水洗掉,其原因是洗涤剂具有(

A、氧化作用 B、乳化功能

C、催化作用 D、溶解油垢的功能

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】完形填空(10小题,每小题1分,共10分)

More and more Americans are going to work by bike. Do you know why more people are 1 bikes to work? We can answer the question in 2 ways. First, bikes dont need gasoline(汽油), so it takes 3 money to use them. Second, a bike doesnt 4 much space(空间), so it is 5 to find a place for it. And riding a bike is good for ones 6 . People often drive their 7 to offices or to shops, but now people think riding bikes is a good way of doing sports.

Thats 8 more Americans are now going to work 9 bike, and they are 10 their own cars at home.

【1】 A. making B. riding C. jumping D. believing

【2】 A. popular B. different C. famous D. friendly

【3】 A. less B. more C. much D. many

【4】 A. mend B. need C. have D. find

【5】 A. easy B. hard C. cheap D. expensive

【6】 A. journey B. health C. study D. work

【7】 A. buses B. trains C. cars D. boats

【8】 A. what B. why C. how D. where

【9】 A. by B. on C. at D. in

【10】 A. cleaning B. leaving C. staying D. learning

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】指出下列溶液中的溶质和溶剂,将其填入下表中.

溶液

溶质

溶剂

(1)生理盐水

(2)澄清的石灰水

(3)碘酒

(4)稀盐酸氯化氢气体的水溶液

(5)高锰酸钾溶液

(6)酒精溶液

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】下列日常洗涤操作中,是利用乳化的原理达到清洗目的的是 ( )

A.用自来水清洗蔬菜

B.用汽油清洗油污

C.用洗涤剂清洗餐具

D.用酒精清洗碘渍

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】摇摇冰是一种即用即冷的饮料。吸食时将饮料罐隔离层中的化学物质和水混

合后摇动即会制冷.该化学物质是

A.氯化钠 B.固体硝酸铵 C.固体氢氧化钠 D.生石灰

查看答案和解析>>

同步练习册答案