Newtandcucumber:

Hi


Is there any tutor agency or publisher who sells PDF lower secondary TOPICAL science worksheets/ answers. If yes please provide a web link, as I wish my son to practise during his half-term school holiday, here in England.

Would like to purchase quickly. Can any parent advocate a good site, please.

Perhaps you would like to explore shipping an assessment book over to England.
Visit Popular or Times bookshop to find out whether they ship OR a friend in SG could help you buy & ship??
https://ao.popular.com.sg/jsp/index.jsp
https://www.goguru.com.sg/shop/study/secondary-school

It’s quiet here…

BUT I want to GIVE A BIG THUMBS UP to the initiative!
I hope all the success to you!

Hi. I teach at CDAC under their Pro Excellence programme for higher-ability students. They provide v. good standards & only engage MOE teachers. Teacher undergo observation by CDAC committee (retired Principal or teachers I gather). Other than that, the vendor I worked with also carry out Enrichment programme for PRIMARY school students in CDAC. To my knowledge, they employ only MOE-teachers (curren or ex). I would recommend it.

Re. the above Exam Question.


Things to recognise:-
1) Ammonia is WEAK alkali (Weak alkali has a ph of 10-11.)
2) HCl (on the right hand side of the tube) is STRONG acid (STRONG acid has a ph 0-1)
3) Universal Indicator color: pH 0-1 is RED; pH 10-11 is DARK BLUE (pH 12 is INDIGO)

Answers to your question:-
1) Better pH 10-11 (every difference of 1 in pH is actually 10x in the actual comparison) but the color CAN BE said as dark blue
2) pH CANNOT be 3 as HCl is strong acid.

Re. the above Exam Question.


Things to recognise:-
1) Ammonia is WEAK alkali (Weak alkali has a ph of 10-11.)
2) HCl (on the right hand side of the tube) is STRONG acid (STRONG acid has a ph 0-1)
3) Universal Indicator color: pH 0-1 is RED; pH 10-11 is DARK BLUE (pH 12 is INDIGO)

Answers to your question:-
1) Better pH 10-11 (every difference of 1 in pH is actually 10x in the actual comparison) but the color CAN BE said as dark blue
2) pH CANNOT be 3 as HCl is strong acid.