题目

    They are most likely to be healthy, wealthy and wise, according to the old saying. But those who are early to bed and early to rise do not always have the upper hand, researchers say. They have revealed that night owls are generally brighter and wealthier than those able to get up early in the morning.     Experts from the University of Madrid carried out tests on around 1,000 teenagers and found that those who preferred to stay up late demonstrated the kind of intelligence associated with honored jobs and higher incomes. ‘Larks' or ‘morning people’, however, often acquir下图是实验室制取气体的发生装置和气体收集装置。回答下列问题:(1)仪器a的名称是。(2)实验室若用高锰酸钾制取氧气,可选择作为发生装置,试管口还需放一团棉花的作用是;其反应的化学方程式是 , 反应的基本类型是。D、E、F、G都是实验室中气体的收集装置,其中不能用来收集氧气的是(填字母编号)。(3)实验室制取二氧化碳时,不用大理石和稀硫酸制取的原因:。实验室制取二氧化碳时,选用B装置比A装置更好的理由是 , 若用G装置收集二氧化碳时,验满的方法是 , 检验二氧化碳时,所发生反应的化学方程式为。(4)通常情况下,SO2是一种无色、有刺激性气味的气体,密度比空气大,易溶于水且水溶液显酸性。实验室里,用亚硫酸钠固体和浓硫酸在常温下反应制取SO2。实验室制取SO2选择的发生装置是(填字母),若选择G装置收集SO2 , 气体应该从口(填“M”或“N”)进入,实验结束后剩余的SO2气体用氢氧化钠溶液吸收,吸收的目的是。
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