Biology; Chemistry; Physics: Post your doubts here!

[syed1995]

Aik aur concept aap logoon ki badaulat clear hogaya! thanks guys

 

[syed1995]

no one forced you to stay here.

yaar wo alert jo aati hai .. automatically force kardeti hai :<

 

[syed1995]

XP page closed by me now .. if anyone wants my attention quote me or tag me so i can notice the post later in an hour or so ..

 

[bogus]

nahin, maybe kuch conditions change ki hon gi, but mainly, yahan pai elimination method use hoga, kai aur koi optionj nahin hosakta to iss liay yeh option.

thanks moni and ashaab

 

[malay]

what question were you answering ??

And now that we are on the topic ..

N2(g) + H2(g) <--> NH3(g)

If forward reaction is exothermic ..

then decreasing the temperature and increasing the pressure will make more Ammonia ...?

I haven't grasped the concept behind applying pressure on gases, where to decrease and where to increase .. can ya help me out there??

according to an unknown law if u apply a constraint to a reaction in equilibrium da reaction occur in such a way to overcome dat constraint
e.g in exothermic reactions as heat is already being released;increasing da temp will favour backward reaction i.e excess heat will bw absorbed......(for basic understanding)
for better understanding visit the link below
http://www.gcsescience.com/h5.htm

 

[Mayedah]

Ovtober nov 2001 mcq no 34 ?

 

[ashiqbal]

Meraa bhi khaana khatam ho gaya hai, going to study now!!

 

[MustafaMotani]

Ovtober nov 2001 mcq no 34 ?

tell the topiC.. /?

 

[Mayedah]

tell the topiC.. /?

Organic !

 

[kitecrystal]

plz explain q16

 

[daredevil]

yes!

ummm... can u plz xplain the LOGIC of this pressure thingy. its confusing
just explain the logic of the first point the others will automtically fall into place bcuz i never understand the pressure effect n equilibrium!!

 

[syed1995]

Ovtober nov 2001 mcq no 34 ?

Q and R only.

P mein beech mein aaraha hai O.. and is not forming the OH as in others .. so others are alcohols while idk what this P is .. but its not an alcohol.

 

[MustafaMotani]

tell the topiC.. /?

do u know the anser its D according to me..

 

[MustafaMotani]

ummm... can u plz xplain the LOGIC of this pressure thingy. its confusing
just explain the logic of the first point the others will automtically fall into place bcuz i never understand the pressure effect n equilibrium!!

I have made a post on previous page take a look at it

 

[a.abid]

i

Ovtober nov 2001 mcq no 34 ?

its d because the Carbon-carbon must be unsaturated as it turns bromine water colourless....
And since it reacts with NaCO3 it must be an acid

 

[a.abid]

i
its A because the Carbon-carbon must be unsaturated as it turns bromine water colourless....
And since it reacts with NaCO3 it must be an acid

oh sorry D

 

[MustafaMotani]

Q and R only.

P mein beech mein aaraha hai O.. and is not forming the OH as in others .. so others are alcohols while idk what this P is .. but its not an alcohol.

Lekin un ka molecular structure to same ha na .. :-\

 

[ayeshaK]

plz explain q16

Its gna be D ! Cuz half mole of oxygen is produced !

 

[MustafaMotani]

oh sorry D

I think u got it wrong

 

[syed1995]

plz explain q16

D hoga ..

2 moles h2o2 kay aik mole bna rahay hain O2 ka .. then 1 mole half mole banaye ga ..

and the volume of product always starts from 0.