Biology; Chemistry; Physics: Post your doubts here!

[MustafaMotani]

D ?

ryt

 

[syed1995]

it would be given with theory paper or with mcq's sheet??

Dono kay sath chipka hua aata hai .. barri hi chipku cheez hai yeh periodic table!!

 

[multixamza01]

hahaha woh barra tafree discussion tha kal ka .. Choota Compass Barra Compass, lols

anyways

they ask equilibrium reactions specifically , B is true for all reactions so B can not be the answer . I think A !

 

[asd]

A Answer hai .. Btao B ghalat kesay hai

It does take part in reaction
Trolling question. It does by lowering the activation energy for the reaction to take place

 

[a.abid]

19 Sulphur dioxide reacts with aqueous bromine according to the following equation.
SO2(g) + Br2(aq) + 2H2O(l) → H2SO4(aq) + 2HBr(aq)
Which element has been oxidised?
A bromine
B hydrogen
C oxygen
D sulphur

Most of the people wud get it wrong

Sulfur?

 

[syed1995]

ryt

B hai meray bhai

B? Answer kya hay?

A Answer hai .. Samjhao B ghalat kesay hai

 

[MustafaMotani]

they ask equilibrium reactions specifically , B is true for all reactions so B can not be the answer . I think A !

LOL

 

[MustafaMotani]

Sulfur?

yeah

 

[multixamza01]

A Answer hai .. Samjhao B ghalat kesay hai

just did , check above

 

[ashiqbal]

A ya B?

B is wrong because catalyst take part in chemical reaction(forming intermediates, remember?). It is just that it remains unchanged at the end of the reaction!

OK please can anyone give reaction of Al2O3 + Na2O?? one is amphoteric and other is basic so yeah, they can react!

 

[rabiafarooq101]

A Answer hai .. Samjhao B ghalat kesay hai

yar pata nahi yay mera sawwal be hain

 

[syed1995]

LOL

EXACTLY!!! Dimagh kay ooper say guzar raha hai yeh MCQ .. :\ yaar tu baqi cheezein equlibrium mein nai hoti kiaaaaaa ..

and what does A even mean ??

 

[rabiafarooq101]

they ask equilibrium reactions specifically , B is true for all reactions so B can not be the answer . I think A !

thanks

 

[asd]

B is wrong because catalyst take part in chemical reaction(forming intermediates, remember?). It is just that it remains unchanged at the end of the reaction!

OK please can anyone give reaction of Al2O3 + Na2O?? one is amphoteric and other is basic so yeah, they can react!

Why ask lol ?

 

[a.abid]

yeah

LOL yayy im ryt

 

[a.abid]

B is wrong because catalyst take part in chemical reaction(forming intermediates, remember?). It is just that it remains unchanged at the end of the reaction!

OK please can anyone give reaction of Al2O3 + Na2O?? one is amphoteric and other is basic so yeah, they can react!

so why cant the answer be D?

 

[syed1995]

B is wrong because catalyst take part in chemical reaction(forming intermediates, remember?). It is just that it remains unchanged at the end of the reaction!

OK please can anyone give reaction of Al2O3 + Na2O?? one is amphoteric and other is basic so yeah, they can react!

zomg .. what are their formulae ? and states?

I think the answer will be .. Al2OH + NaO .. as when we dissolve in water H+ and OH- will also take part in the reaction!!

Na2Al2O4 is formed. <-- Google

Not in our course as Sodium Aluminate will be formed !! and its a complex salt ... !!

 

[a.abid]

B is wrong because catalyst take part in chemical reaction(forming intermediates, remember?). It is just that it remains unchanged at the end of the reaction!

OK please can anyone give reaction of Al2O3 + Na2O?? one is amphoteric and other is basic so yeah, they can react!

for amphoteric ive written this equation:
ZnO+ 2NaOH + H2O-----> Na2Zn(OH)4
PbO+2HCl-----> PbCl2+H2O

 

[MustafaMotani]

EXACTLY!!! Dimagh kay ooper say guzar raha hai yeh MCQ .. :\ yaar tu baqi cheezein equlibrium mein nai hoti kiaaaaaa ..

and what does A even mean ??

Organic catalyst biological enzyme hotay hai
Inorganic Normal iron, platinum etc

 

[asd]

so why cant the answer be D?

It does NOT provide the energy to start the reaction, it just lowers the activation energy. 2 different things.