Biology; Chemistry; Physics: Post your doubts here!

[Saad Mughal]

I was opting for carboxylic acid. But how are we supposed to choose our answer if the carboxylic acid formula is not right? I mean banda check karta ha?

Look, carboxylic acids don't contain double carbon-carbon bonds so this acid will not follow the general formula for the ordinary carboxylic acids.

 

[usama321]

[q

Zinc reacts with water over ages.
Zinc reacts with steam to form ZnO.
If you use powdered zinc and very hot water then the zinc reacts otherwise it is a process that takes ages.

 

[Saad Mughal]

[q

Fundamental Chemistry.

 

[usama321]

Fundamental Chemistry.

mujhe bi bhej do aik copy

 

[Saad Mughal]

mujhe bi bhej do aik copy

Main tou khud shukar kr rha hun k mery paas hai.

 

[Saad Mughal]

mujhe bi bhej do aik copy

Readings.com.pk - FTW. Ik din main order mangwa lo. Altaf Bhai ki dhamki dedena.

 

[usama321]

Main tou khud shukar kr rha hun k mery paas hai.

by the way is it easily available locally, or you had to do some roaming around the city?

 

[TheLeagueofShadows]

View attachment 27163 I know its c. But potassium dichromate is an oxidising agent which means it reduces itself. Now iron(ii) also reduces to form iron (iii). What am I doing wrong here?

 

[Saad Mughal]

by the way is it easily available locally, or you had to do some roaming around the city?

Urdu Bazaar - . Waise it should be available easily because it is Cambridge endorsed and an Oxford publication.

 

[usama321]

View attachment 27163 I know its c. But potassium dichromate is an oxidising agent which means it reduces itself. Now iron(ii) also reduces to form iron (iii). What am I doing wrong here?

iron 2 oxidises to form iron 3 by losing one electron

 

[Saad Mughal]

View attachment 27163 I know its c. But potassium dichromate is an oxidising agent which means it reduces itself. Now iron(ii) also reduces to form iron (iii). What am I doing wrong here?

Re-attach the file. It's giving an error.

 

[TheLeagueofShadows]

 

[Saad Mughal]

View attachment 27163 I know its c. But potassium dichromate is an oxidising agent which means it reduces itself. Now iron(ii) also reduces to form iron (iii). What am I doing wrong here?

Iron (II) does not reduce it OXIDIZES to Iron (III) since it loses one MORE electron.

 

[TheLeagueofShadows]

Kia khaya ha nashte me?

 

[Saad Mughal]

Kia khaya ha nashte me?

This is pretty basic stuff bro. I'm actually worried because of MCQ's. They're suffocating me.

 

[TheLeagueofShadows]

This is pretty basic stuff bro. I'm actually worried because of MCQ's. They're suffocating me.

Me soya nahi hun Abhi basic bhi nahi arahi.

 

[Saad Mughal]

Me soya nahi hun Abhi basic bhi nahi arahi.

Main bhi 3 ghanty soya hun. Tension is going to get the better of me.

 

[usama321]

This is pretty basic stuff bro. I'm actually worried because of MCQ's. They're suffocating me.

bhai jan mcq past paper 10 year ker lo. Maine sirf summer ke last 10 years kie hain, ab kafi achi tayari ho gai hai shukar Allah ka

 

[Saad Mughal]

bhai jan mcq past paper 10 year ker lo. Maine sirf summer ke last 10 years kie hain, ab kafi achi tayari ho gai hai shukar Allah ka

Tiyari hai meri.
Theory main masla nhi hota. MCQ's main tumharay average marks kitny hain?
I do about 4 MCQ papers in one hour.

 

[usama321]

Tiyari hai meri.
Theory main masla nhi hota. MCQ's main tumharay average marks kitny hain?
I do about 4 MCQ papers in one hour.

hmmm bari speed hai taqreeben 38, tak hai