江苏省无锡市2017年中考化学真题试题(含解析1)
江苏省无锡市2017年中考化学真题试题选择题(本题包括14小题,梅小题只有1个选项符合题意。每小题1分,共14分)1.绿色化学的核心是要利川化学原理从源头上减少和消除工业生产对环境的污染。下列措施属于“绿色化学”范畴的是A.杜绝污染源B.治理污染点C.深埋有毒物D.处理废弃物【答案】A2.在盛有水的烧杯中加人以下某种物质,形成溶液的过程中,温度下降。这种物质可能是A.氯化钠B.硝酸铵C.氢氧化钠D.蔗糖【答案】B【解析】物质溶于水分为两个过程,向水中扩散的过程吸收热量,与水分子结合形成水合分子的过程放出热量,如果吸收热量大于放出热量,就表现为吸热,如果吸收热量小于放出热量,就表现为放热,如果相...
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