Как-то Лариса вошла в комнату к своему старшему брату

FAQ › Рубрика: Физика › Как-то Лариса вошла в комнату к своему старшему брату

Марина спросил 9 лет назад

Как-то Лариса вошла в комнату к своему старшему брату, в которой он уже длительное время распечатывал что-то на принтере, и почувствовала очень резкий запах. Лариса убедила брата выключить принтер и проветрить комнату. Войдя в комнату после проветривания, она почувствовала запах свежести, как после грозы. По своим наблюдениям Лариса сделала несколько выводов:

При работе принтера образуется некое вещество X с сильным запахом.
Вещество X может образовываться как в принтере, так и во время грозы.
Запах вещества X зависит от его количества (концентрации) в воздухе.

Оцените правильность выводов, которые сделала Лариса.
А) все выводы правильные;
Б) правильны только 1 и 2 выводы;
В) правильны только 2 и 3 выводы;
Г) правильны только 1 и 3 выводы;
Д) все выводы неправильные.

Теги вопроса:5 класс

1 ответ

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admin Админ. ответил 9 лет назад

Правильный ответ: А - все выводы правильные.

Вещество о котором идет речь в вопросе это озон. Об озоне известные следующие факты.

«Неприятный запах», который появляется при работе лазерного принтера или копира — это озон.
Во время грозы, когда электрические разряды молнии «прошивают» атмосферу, образуется озон, который мы ощущаем как свежесть воздуха.
Дышать озоном высоких концентраций опасно, он способен сжечь слизистую оболочку дыхательных органов. При этом он имеет запах, подобный запаху хлора. Озон является сильным окислителем. Здесь кроются его положительные и вредоносные свойства. Все зависит от концентрации, т.е. от процентного соотношения содержания озона в воздухе. При умеренном содержании озона — чувствуется «запах электричества». В малых количествах озон поддерживает и оздоравливает, в больших количествах – может погубить. Таким образом, запах озона зависит от его концентрации.

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