Biology; Chemistry; Physics: Post your doubts here!

[asadalam]

Do sugars commonly refer to starch and other LONG CHAIN polymer carbohydraes or simpe sugars like Glucose fructose...?I mean which do they mostly refer to.

Sugars are all of those,mono,di,polysaccharides.Was my ans above right?

 

[Laibaaa]

in the section B part, the endo question with the parts of increasing temp and pressure, both favoured Right hand side right? :/

 

[Dream.Eater]

Gas in steel making in p2 first q was oxygen right,some of my friends chose CO

yes since o2 helps remove some c from the impure fe

 

[Abdul Hanan]

guys WHO did B8 was the element with the ethanol
LITHIUM ??? 4 MARKS

 

[asadalam]

There was one question about compounds - what was that? Don't remember

That flowchart?I explained above you can see....previous few pages

 

[Abdul Hanan]

what was the answer to the MCQ...... hydrogen compouds with group 7 elements always .......???

 

[M.Omar]

Yes

Which question?

 

[Abdul Hanan]

http://wiki.answers.com/Q/Does_zinc_nitrate_reacts_with_HCl?#slide=1
This says zinc nitrate do react with HCL maybe its wrong.....

 

[Dream.Eater]

http://wiki.answers.com/Q/Does_zinc_nitrate_reacts_with_HCl?#slide=1
This says zinc nitrate do react with HCL maybe its wrong.....

ZnNo3 was the odd one out. The rest were carbonate and bases both of which we know for sure,would react with HCl

 

[M.Omar]

2nd mcq? anyone?

we,r having reservations abt it being either C or D

 

[Abdul Hanan]

ZnNo3 was the odd one out. The rest were carbonate and bases both of which we know for sure,would react with HCl

i chose carbonate as it is insoluble..... i know i am wrong so don't explain
by the way i think yea ZnNo3 should be right maybe that website is wrong ....

 

[asadalam]

Wht abt MCQ of metals NA mand Mg why MG higher .mp and b.p

I chose the larger atom one,the rest were of their ionic compounds.

 

[Abdul Hanan]

we,r having reservations abt it being either C or D

its a repeated question it was "calcium carbonate"

 

[Abdul Hanan]

I chose the larger atom one,the rest were of their ionic compounds.

wasn't the answer the electrostatic forces one ?........

 

[asadalam]

its a repeated question it was "calcium carbonate"

Which Q was that?Do you remember wording?

 

[Abdul Hanan]

Not that. It's the pressure, catalyst temp one

oh ok.... it was "only pressure" right?

 

[hassanaftab19463]

I got that wrong, I did B :/
I dont even remember the options of B. What was the question? And the conditions given in the 2nd mcq ?

 

[Abdul Hanan]

Which Q was that?Do you remember wording?

the one having a chart i think i dont remember the words

 

[exploded diper]

i also said that

wasn't the answer the electrostatic forces one ?........

 

[exploded diper]

hmm i dont remember that one.....btw that electrostatic is in ionic compounds,as elements they dont have that property..

but mg is besides na .. not below .. oesnt the atoms size icrease if it is below it since then sells would increase