精品解析:2022年四川省德阳市中考化学真题(解析版)
化学1.日常生活中的许多活动与化学有关。下列活动中存在化学变化的是A.毛线织衣B.晾干湿衣C.雕刻石像D.木柴燃烧【答案】D【解析】【详解】A、毛线织衣没有新物质生成,属于物理变化,不符合题意;B、晾干湿衣是水分子运动到空气中,属于物理变化,不符合题意;C、雕刻石像改变了石头的形状,没有产生新物质,属于物理变化,不符合题意;D、木柴燃烧会产生二氧化碳等物质,有新物质生成,属于化学变化,符合题意。故选:D。2.分类是认识和研究物质及其变化的常用的科学方法,如物质可分为纯净物和混合物。下列物质属于化合物的是A.盐酸B.镁铝合金C.氢氧化钠D.氮气【答案】C【解析】【分析】物质分为混合物和纯净物,混...
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