精品解析:2024年北京市中考化学真题(原卷版)
【淘宝搜索店铺:中小学教辅资源店微信:mlxt2022】化学本试卷满分70分,考试时间70分钟。可能用到的相对原子质量:H-1C-12N-14O-16Ti-48Fe-56第一部分本部分共25题,每题1分,共25分。在每题列出的四个选项中,选出最符合题目要求的一项。1.下列变化属于化学变化的是A.冰雪融化B.酒精挥发C.镁条燃烧D.矿石粉碎2.如表列出了某食品的营养成分,其中含量最高的是项目每100g蛋白质脂肪碳水化合物钠35.0g5.6g4.5g180mgA.蛋白质B.脂肪C.碳水化合物D.钠3.下列物质属于纯净物的是A.大理石B.氯化钾C.汽水D.蔗糖溶液深入打好蓝天、碧水、净土保卫战,持续...
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