How was paper went of CHEMISTRY 5070/22

[Dark Destination]

Sugar is the generalized name for sweet, short-chain, soluble carbohydrates, many of which are used in food. They are carbohydrates, composed of carbon, hydrogen, and oxygen.

 

[Dark Destination]

It has many carbon carbon double bonds.

I wrote MANY. I wrote DOUBLE BONDS. But C-C? I didn't write that. So i'll lose a mark?

 

[fazlovelfc]

The percentile is gonna be damn high people!

 

[Rida Zahra]

me too same CO

its CO.

 

[Rida Zahra]

it

its a neutralisation so its H+ + OH- = H2O
caoh is somewhat soluble since its solution is limewater afterall.....

it wasnt the neutralization reation though i wrote the same equation.
the reaction had to be between calcium hydroxide and ammonium phosphate(the fertilizer that caused the soil to become acidic).

 

[Rida Zahra]

Zinc nitrate

are you sure about it?zinc hydroxide isnt soluble.it isnt an alkali.so iron hydoxide should have not reacted.
anyways, i wrote zinc nitrate and later thought i could have been zinc hydroxide.

 

[Devrex101]

hey guys i wrote 'saccarides' for the q on carbohydrates.is it correct? 0.O

 

[rammy97]

How come?? Don't you think it will react with HCL to give CO2, ZnCl2 and H2O???

may be but either way its still insoluable Plus it says here tht zinc nitrate does react with HCl http://wiki.answers.com/Q/Does_zinc_nitrate_reacts_with_HCl?#slide=2

 

[Syed Mirak]

are you sure about it?zinc hydroxide isnt soluble.it isnt an alkali.so iron hydoxide should have not reacted.
anyways, i wrote zinc nitrate and later thought i could have been zinc hydroxide.

acids react with metals (h2+salt) metal oxides(salt+h20) metal hydroxides(salt+h20) and metal carbonates (salt co2 and h20) . it doesn't react with metal nitrate . no doubt there

 

[Syed Mirak]

d

What was the answer of salts qs. in sec A??

 

[Dark Destination]

may be but either way its still insoluable Plus it says here tht zinc nitrate does react with HCl http://wiki.answers.com/Q/Does_zinc_nitrate_reacts_with_HCl?#slide=2

But all metal carbonates are insoluble, except group 1, yet they all react with HCL.
CaCO3 always reacts with HCL, even though it is insoluble.

 

[rammy97]

acids react with metals (h2+salt) metal oxides(salt+h20) metal hydroxides(salt+h20) and metal carbonates (salt co2 and h20) . it doesn't react with metal nitrate . no doubt there

That makes sense..

 

[rammy97]

But all metal carbonates are insoluble, except group 1, yet they all react with HCL.
CaCO3 always reacts with HCL, even though it is insoluble.

Yeah Im kinda getting that now cuz its insoluable in water not HCl

 

[Ram97]

d

which was aluminium

 

[rammy97]

So there was this MCQ in ppr 1 in which u had to count the electrons not participating in bonding for this orgainc subs (prop-something) Option A was 8 and D was 22 Dont remember the rest thou... what did everyone write?

 

[sid2333]

No, it was the REACTION between calcium hydroxide and acid in the soil. You could have taken any acid into consideration for the reaction to give the ionic equation!

it

it wasnt the neutralization reation though i wrote the same equation.
the reaction had to be between calcium hydroxide and ammonium phosphate(the fertilizer that caused the soil to become acidic).

 

[sid2333]

what was the ques can you just repeat it kindly?

are you sure about it?zinc hydroxide isnt soluble.it isnt an alkali.so iron hydoxide should have not reacted.
anyways, i wrote zinc nitrate and later thought i could have been zinc hydroxide.[/quo

 

[Syed Mirak]

So there was this MCQ in ppr 1 in which u had to count the electrons not participating in bonding for this orgainc subs (prop-something) Option A was 8 and D was 22 Dont remember the rest thou... what did everyone write?

i wrote 22

 

[fazlovelfc]

It was zinc metal , Mentioned in chemistry matbook! book

 

[Rida Zahra]

and what about that question, the group or compound that makes carbohydrate?
i wrote alcohol group.