IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IGCSE/ GCSE => Sciences => Topic started by: mr_scholes on June 11, 2009, 03:58:28 pm

Title: p1 chemistry, q-21 june 2000
Post by: mr_scholes on June 11, 2009, 03:58:28 pm
What's the answer for p1 chemistry june 2000 q 21??????
Title: Re: p1 chemistry, q-21 june 2000
Post by: .... on June 11, 2009, 04:00:43 pm
Quote from: mr_scholes on June 11, 2009, 03:58:28 pm
What's the answer for p1 chemistry june 2000 q 21??????
A, aluminium forms white, iron forms green or brown, and although not in course, chromium forms green too.
Title: Re: p1 chemistry, q-21 june 2000
Post by: mr_scholes on June 11, 2009, 04:15:41 pm
Quote from: i-insane on June 11, 2009, 04:00:43 pm
Quote from: mr_scholes on June 11, 2009, 03:58:28 pm
What's the answer for p1 chemistry june 2000 q 21??????
A, aluminium forms white, iron forms green or brown, and although not in course, chromium forms green too.


could u please copy the question and the options because mine isn't very clear
By the way why is q30 A??
Title: Re: p1 chemistry, q-21 june 2000
Post by: Ghost Of Highbury on June 11, 2009, 05:00:54 pm
it has to be "C"
as SO2 plus H2O gives sulphuric acid
the pH of an acid is below 7 and turns blue litmus paper red