Paper 1 February/March 2018 CHEMISTRY (9701/12) IGCSE
CIE
AS & A Level
Chemistry (9701)
خرداد
2018
شامل مباحث:
تعداد سوالات: 30
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه

پیش نمایش صفحه اول فایل
Sodium is added to water to form solution Y. The pH of solution Y is measured.
When powdered substance X is added to solution Y, the pH falls.
Which two compounds could each be substance X?