paper 1 October/November 2007 Chemistry (0620) IGCSE
Cambridge
IGCSE
Chemistry (0620)
بهمن
2007
مشاهده نمونه سوال
شامل مباحث:
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
45 دقیقه
پیش نمایش صفحه اول فایل
Fateme Naderi Water is purified using several processes.
Four of the processes are listed.
1 Chlorine is added to water to kill any bacteria.
2 Water is passed through coarse gravel to remove large pieces of dirt.
3 Water is passed through wire screens to remove large twigs.
4 Water is passed through fine sand to remove small particles.
In which order are the processes carried out?
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