9700/11 Biology Oct Nov 2023 Online Test | Cambridge AS and A Level MCQ
Cambridge
AS & A Level
Biology (9700)
بهمن
2023
مشاهده نمونه سوال
شامل مباحث:
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه
پیش نمایش صفحه اول فایل
Marila Lombrozo An indicator is colourless in acid and pink in alkali.
In an experiment a petri dish of agar was prepared using an acidic solution of this indicator.
A disc of agar 1 cm in diameter was removed from the centre to create a well.
A white card showing circular marker lines 1 cm apart was placed underneath the petri dish.
$1c{m^3}$ alkali solution was put into the well in the agar and a stop-watch was started.
A…
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