精英家教網 > 初中地理 > 題目詳情

【題目】下表是同學們做“溶液的形成”實驗的記錄.以下說法不正確的是(

溶質

高錳酸鉀

溶劑

汽油

酒精

汽油

溶解性

不溶

易溶

可溶

易溶

不溶

A.衣服上不慎沾上碘酒,可用汽油擦洗

B.同一物質在不同溶劑中的溶解性不同

C.水、汽油、酒精都可以作溶劑

D.溶液都是均一、穩(wěn)定、無色的混合物

【答案】D

【解析】根據表中信息可知,碘易溶于汽油,因此,衣服上的碘酒可以用汽油擦洗,A正確;碘在水、汽油、酒精中的溶解性不同,高錳酸鉀在水、汽油中的溶解性也不同,這說明同一物質在不同溶劑中的溶解性不同,B正確;水、汽油、酒精都可作溶劑,C正確;溶液是均一、穩(wěn)定的混合物,但不一定是無色的,D錯.

練習冊系列答案
相關習題

科目:初中地理 來源: 題型:

【題目】書面表達(15分)

你每天的家庭作業(yè)都是什么時間完成的?需要父母的幫忙嗎?請你結合上面文章的內容,寫一篇短文。內容包括:

1. 每天大概花多少時間做作業(yè)?

2. 能不能自覺獨立地完成自己的作業(yè)?

3. 你怎樣看待家庭作業(yè)?

要求:

1. 不能照抄原文;不得在作文中出現學校的真實名稱和學生的真實姓名。

2. 語句連貫,詞數在80個左右。作文的開頭和結尾已經給出,不計入總詞數。

I often spend nearly two hours to do my homework every day. ______________________________________

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

If so, we will feel tired and don’t want to do it carefully.

查看答案和解析>>

科目:初中地理 來源: 題型:

【題目】很多化學反應都在溶液中進行的原因是(

A、易于操作 B、反應速率快 C、不需加熱 D、設備簡單

查看答案和解析>>

科目:初中地理 來源: 題型:

【題目】根據句意,用所給單詞的適當形式填空。

1My father goes to school for the _______ (parent) meeting this afternoon.

2I'm not good at Maths. It is _______ (real) hard.

3We have lessons at 8:00 _______ (clock) every day.

4I listen to music every day. It makes me _______ (feel) excited.

5The _______ (hall) on the ground floor look very bright and clean.

查看答案和解析>>

科目:初中地理 來源: 題型:

【題目】I am Lisa.I study in Beijing International School now.There are fifty-four students in my class.Only six students go to school on foot,because they live near our school.Li Xiang says it usually takes him about fifteen minutes to walk to school.Eighteen students go to school by bike.Some of them think it is faster to ride bikes than to take buses in the morning and evening.They also think riding bikes is good for them.Twenty-two students take buses or the subway(地鐵)to sch001.Most of them have to take more than one bus to get to school,so they must get up early every day.And other students go to school by car.Their parents drive them to school first,and then go to work.Do you know how I get to school? I'm one of the eighteen people.

1Why do the twenty—two students get up early every day?

2How many students go to school by car?

3How do you go to school? Why?

查看答案和解析>>

科目:初中地理 來源: 題型:

【題目】生活中的下列物質不屬于溶液的是

A.汽水

B.蒸餾水

C.糖水

D.碘酒

查看答案和解析>>

科目:初中地理 來源: 題型:

【題目】根據漢語意思完成句子,每空一詞。

1Lisa went to Beijing ________ ________ (度假) last year.

2We have _______ _______ _______ (相當多的) books in the Book Corner.

3He ________ ________ ________ (為考試而學習) last night.

4They _______ ______ _______ _______(去海灘) on their school trip.

5Last year I ________ ________(拍照片)with my family on the Great Wall.

查看答案和解析>>

科目:初中地理 來源: 題型:

【題目】t時某物質的溶解度100g,該溫度下,此物質的飽和溶液中下列質量關系正確的是(

A、溶質:溶液=1:1 B、溶質:溶劑=1:1

C、溶劑:溶液=1:1 D、飽和溶液的質量一定為200g

查看答案和解析>>

科目:初中地理 來源: 題型:

【題目】要使硝酸鉀的溶解度增大,采用的方法是

A、增加水 B、增加KNO3 C、不斷攪拌 D、升高溫度

查看答案和解析>>

同步練習冊答案