Physics, Chemistry and Biology: Post your doubts here!

[Counter Logic Gamer]

Al2O3
CaO
CO2
CO
MgO
SO2

which above oxides will react with hydrocloric acid but not with aqueous sodium hydroxide?

which above oxides will react with aqueous sodium hydroxide but not with hydrocloric acid?

which above oxides will react with both hydrocloric acid and with aqueous sodium hydroxide?

which above oxides will neither react with hydrocloric acid and with aqueous sodium hydroxide?

urgent help .... if you have resources on this topic or subject pls send to [email protected]

 

[Nabeel.Ahmad]

which above oxides will react with hydrocloric acid but not with aqueous sodium hydroxide?

Basic Oxides; CaO. MgO.

which above oxides will react with aqueous sodium hydroxide but not with hydrocloric acid?

Acidic Oxides; CO2 and SO2.

which above oxides will react with both hydrocloric acid and with aqueous sodium hydroxide?

Amphoteric Oxides; Al2O3

which above oxides will neither react with hydrocloric acid and with aqueous sodium hydroxide?

Neutral Oxides; CO

 

[Basil.J]

Assalam-o-Alaikum.
Post your Physics, Chemistry and Biology doubts in here and members, along with me will try their best to help you out.

hello everybody i am struggling to understand how to answer igsce biology questions, i know the theory well but dont know the format of answering questions. for example if given a five mark question( Explain how some mammals are able to stay in cold water for a long time?, 0610/31/M/J/12)
Is it five points( NO EXPLANATIONS) i have to write or four points with explanations

 

[asma tareen]

I

hello everybody i am struggling to understand how to answer igsce biology questions, i know the theory well but dont know the format of answering questions. for example if given a five mark question( Explain how some mammals are able to stay in cold water for a long time?, 0610/31/M/J/12)
Is it five points( NO EXPLANATIONS) i have to write or four points with explanations

U should check the syllabus for that

 

[Basil.J]

I

U should check the syllabus for that

thanks but is it anywhere specific in the syllabus,

 

[asma tareen]

[qu.J, post: 712321, member: 76389"]thanks but is it anywhere specific in the syllabus,[/quote]
The Appenfix

 

[Mahnoorfatima]

hey this is related to GCE but I need some help! IS the usage of set square while finding the image and position of lens included? Cause there was a question in I guess nOv 2002. I solved till 2008 , No such question was repeated or asked But I want to confirm it.........

 

[Hunaid]

Hi.

Use this website to solve topical and yearly past papers online of GCE O Level Physics, Biology, Economics, Chemistry and Accounts http://www.automaticpapers.com/gce-o-level-past-exam-papers/

 

[princess sofia]

hello everybody i am struggling to understand how to answer igsce biology questions, i know the theory well but dont know the format of answering questions. for example if given a five mark question( Explain how some mammals are able to stay in cold water for a long time?, 0610/31/M/J/12)
Is it five points( NO EXPLANATIONS) i have to write or four points with explanations

U just need to write 5 points but a liitle bit explaining bt nt so long

 

[♣♣ vishal ♠♠]

hello everybody i am struggling to understand how to answer igsce biology questions, i know the theory well but dont know the format of answering questions. for example if given a five mark question( Explain how some mammals are able to stay in cold water for a long time?, 0610/31/M/J/12)
Is it five points( NO EXPLANATIONS) i have to write or four points with explanations

bro... mostly you have to write points rather explanations but some times explanations is needed.!!! it depends on the question ... this is what i did last here during igcse and got distinction..!!!

 

[TheAnarchist141612]

Chem : What do the chemical properties of an element mainly depend on?

 

[♣♣ vishal ♠♠]

Chem : What do the chemical properties of an element mainly depend on?

the chemical properties mainly depend on number of electrons in its outer most shell . valence electrons as they are the only ones involved in bonding...

 

[TheAnarchist141612]

the chemical properties mainly depend on number of electrons in its outer most shell . valence electrons as they are the only ones involved in bonding...

Thanks a truckload.

 

[♣♣ vishal ♠♠]

Thanks a truckload.

my pleasure and your welcome.!! bro..!!
It's my duty to help you..!!

 

[TheAnarchist141612]

Can someone give me the notes of Biotechnology? Please? I need your help!

 

[♣♣ vishal ♠♠]

Can someone give me the notes of Biotechnology? Please? I need your help!

 

[TheAnarchist141612]

OMG!!! U R AWESOME!!!

 

[♣♣ vishal ♠♠]

OMG!!! U R AWESOME!!!

thank u..!!

 

[TheAnarchist141612]

thank u..!!

Your very much welcome

 

[Sariya Khan]

HOW TO STOP CABLES FROM OVERHEATING? I