0620/12 Chemistry Oct Nov 2017 Online Test | Cambridge IGCSE MCQ
Cambridge
IGCSE
Chemistry (0620)
بهمن
2017
مشاهده نمونه سوال
شامل مباحث:
تعداد سوالات: 38
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
45 دقیقه
آزمون نمره منفی دلرد
پیش نمایش صفحه اول فایل
Three reactions are described.
1- An acid is added to substance H. Rapid fizzing happens and the temperature decreases.
2- When substance J is ignited, it produces large quantities of heat.
3- Substance K reacts slowly with air and becomes warmer.
Which reactions are endothermic?