4.4化学式与化合价—2021-2022学年化学人教版九年级上册随堂小测
※题型：单选题※知识点：单选题※试题难度：容易<br>据《广州日报》报道,广东紫金县违规排污事件造成的铅(Pb)污染导致45人血铅超标。符号“Pb”不表示( )<br>A.铅元素 B.金属铅 C.一个铅原子 D.一个铅分子<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/9131b4548af745c4a0c5ecdd62e8f50e/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较易<br>尿素是农业生产中常用的一种化肥,其化学式是<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/4/F9DDDA97CC9A388F54A9D6C8F5944AF4.png"><br>,下列有关尿素的说法正确的是( )<br>A.尿素分子中含有氢分子<br>B.尿素分子是由碳、氧、氮、氢四种元素组成的<br>C.尿素中共含有8个原子<br>D.尿素分子中C、H、O、N的原子个数比是1:4:1:2<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/9983f38be68543f0a1a8524111cf5ff3/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较易<br>笑气是人类最早应用于医疗的麻醉剂之一,笑气是氮的一种氧化物,该氧化物中氮元素的化合价为+1价,则笑气的化学式为( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/4/DB6EDC2674995A2BA133F9A9B74B55A7.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/4/9A5F036DEAF58288F590FC42D8F5E73C.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/4/E1D30BBA3A85959FB58E2CC8FDA13AF5.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/4/4A96C1551765DB5CC08F54FE7FC53F5B.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/8af1639d0b6544618b490c0b5cf68ab8/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列关于<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/1/8D41C3F4D4B9F26B4418813746107B48.png"><br>三种物质的说法正确的是()<br>A.均含有1个氢分子 B.均含有2个氢原子<br>C.均含有氢元素 D.均含有2个氢离子<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/1531daa18295450eb0dcd4d3bed98ce0/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：中等<br>氧化铟(<img src="https://picture2.zhihuicn.com/testImage/2/2021/2/24/88DAED027C0F111D5F4B0D5EA61DC4E6.png"><br>)是制造触摸屏的主要材料。氧化铟中铟(In)元素的化合价是( )<br>A.+1 B.+2 C.+3 D.+6<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/8280c69fec7a456691bc90cd5710c710/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/5a19520d706c458693f4beaf8cb9221e/D745C5F0BAE6E2A78A6CB6E58C9309FE.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>化学式<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/25/7002435560602C62060BA723DC55D86C.png"><br>表示的意义不正确的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/25/FCC752FE31B1A2534B0A02BB018FA0EC.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/25/21DB16AB91D4A107512780D25E47FD3D.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/25/C450824F30030D95E0D8A8A15AEFBE39.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/25/BC250D65E31BCF5095BD2A0B0F50F9BE.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/c8e443f1f6f8405bb6f1743577f524df/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/023abfd6195543f08dd1bcc1a4fb7401/2F197752041C08BEFEC028326E51CF76.png"><br><br>※题型：单选题※知识点：单选题※试题难度：容易<br>下列物质的化学式书写和读法完全正确的是( )<br>A.MgO——氧化镁 B.FeO——氧化铁<br>C.ClNa——氯化钠 D.五氧化二磷——<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/25/FCD5632F7AD861C05F39EFF3D06E70CE.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/f6d7e4bb8c9e45ca8ab49298f70ad6a1/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/bfa02e94cf3945099af379ae847a34d6/50A59FAD91B62E8E55B55D857B4CE594.png"><br><br>
页:
[1]