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教学参考

2012化学中考最新时事热点---牛奶中毒事件

作者：czhxzx  人气： 701 次  时间：2012年06月18日  星级：

2011年4月7日，甘肃省平凉市崆峒区发生一起疑似食物中毒事件，中毒病例均服用过散装牛奶，确认系亚硝酸盐中毒。造成3名婴幼儿死亡，39名中毒患者被送往当地医院救治，称为“ 4•7”牛奶中毒事件。
亚硝酸盐即通常所说的工业用盐，亚硝酸盐能在人体内转化为亚硝酸胺引起的一种高铁血红蛋白血症，也称肠源性青紫病。会影响中毒患者血红蛋白的携氧能力，致使患者组织缺氧，如治疗不及时可导致死亡。亚硝酸盐还是一种常见的致癌物质。
【中考创题】
1、工业用盐亚硝酸钠（NaNO2）外观极像食盐，人若误食亚硝酸钠会中毒。亚硝酸钠中氮元素的化合价是 （     ）
            A.+1            B.+2           C.+3              D.+4
2、食品与健康相关，下列作法不会危害人体的是（      ）
     A.香肠中加过量的亚硝酸钠                B.饲养猪加入瘦肉精
    C.蒸馒头加适量纯碱                             D.长期使用铝餐具
3、 2011年4月7日甘肃省平凉市崆峒区又发生一起误把亚硝酸钠当食盐的中毒事件，确保食品安全的警钟再次敲响，亚硝酸钠（NaNO2）外观与食盐极相似，有咸味，区别它们的有效方法是隔绝空气加热，没有明显变化的是食盐，能分解放出刺激性气味气体的是亚硝酸钠，此气体可能是 （      ）
     A. SO2                  B. NH3                  C. N2           D. NO2
4、了解食品安全知识，可以更好地保护人身和财产安全。下列做法不正确的是 （     ）
      A.发现燃气泄漏应立即开窗通风关阀门
.......................

 

 

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