Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Question

secondary 4 | Chemistry
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
Jonathan
Jonathan

secondary 4 chevron_right Chemistry chevron_right Singapore

How to find D as the answer?

Date Posted: 2 years ago
Views: 222
Kris
Kris
2 years ago
SO2 is acidic oxide. It reacts with water to form acid. (PH2 is the pH of acid)

CuO is basic oxide. insoluble cos it was not dissolved in water

CaO is also basic oxide. Soluble as it dissolve and react with water to form alkalis
Eric Nicholas K
Eric Nicholas K
2 years ago
Copper II oxide is also known for being black in colour.

(Copper II hydroxide is blue in colour while copper II carbonate is green in colour and copper metal can be pink in colour)

Aluminium oxide, on the other hand, is likely white or grey in colour.

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Kris
Kris's answer
1 answers (A Helpful Person)
1st
Ans see comment under your qn.
Hope this table will help you