9700/13 Biology Oct Nov 2016 Online Test | Cambridge AS and A Level MCQ
Cambridge
AS & A Level
Biology (9700)
بهمن
2016
مشاهده نمونه سوال
شامل مباحث:
AS Level
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه
پیش نمایش صفحه اول فایل
Neda Bani In order to estimate the quantity of glucose in a solution, equal volumes of a range of known concentrations were mixed with equal excess volumes of Benedict’s solution and placed in a thermostatically controlled water-bath at ${90^ \circ }C$ for the same length of time.
The unknown solution was then treated in the same way and the colours of the known and unknown solutions compared.
What is the independent variable in this procedure?
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