Biology; Chemistry; Physics: Post your doubts here!

[multixamza01]

so why cant the answer be D?

a catalyst lowers the activation energy , not provide it

 

[a.abid]

a catalyst lowers the activation energy , not provide it

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

Thankyou guys thou i knew the answer was wrong pata nai kya soch kar mainay poocha anyways gud job

 

[syed1995]

Thankyou guys thou i knew the answer was wrong pata nai kya soch kar mainay poocha anyways gud job

ye na soocho kay kyun poocha .. ya kyun poochoon .. bus pooch loo .. cuz kia pta wohi question kisi aur ko na aata ho .. aur aapki post dekh kay aajaye

 

[a.abid]

ye na soocho kay kyun poocha .. ya kyun poochoon .. bus pooch loo .. cuz kia pta wohi question kisi aur ko na aata ho .. aur aapki post dekh kay aajaye

haha okay

 

[MustafaMotani]

ye na soocho kay kyun poocha .. ya kyun poochoon .. bus pooch loo .. cuz kia pta wohi question kisi aur ko na aata ho .. aur aapki post dekh kay aajaye

yar wo mcq which year ka tha. .??

 

[SomeStudent]

I have a doubt! What is the difference b/w a monomer and a repeat unit? Are they the same thing? N how do we draw them?

 

[multixamza01]

I have a doubt! What is the difference b/w a monomer and a repeat unit? Are they the same thing? N how do we draw them?

a monomer has double bond . a repeat unit is enclosed by brackets and has single bonds with two empty bonds on each side .

Hope you get it!

 

[syed1995]

yar wo mcq which year ka tha. .??

http://www.xtremepapers.com/papers/...l O Level/Chemistry (5070)/5070_s10_qp_11.pdf

Q14..

 

[a.abid]

If anyone here is having the pastpapers book,cud u plz explain what is the answer for June 2000 PAper 1 Mcq....part 3

 

[MustafaMotani]

If anyone here is having the pastpapers book,cud u plz explain what is the answer for June 2000 PAper 1 Mcq....part 3

konse topic se hai.. ?? meray pas topical hai

 

[syed1995]

Also balance the equation below

SO2 + H2O + NH3 --->

 

[multixamza01]

If anyone here is having the pastpapers book,cud u plz explain what is the answer for June 2000 PAper 1 Mcq....part 3

you mean MCQ 3 right?

 

[syed1995]

If anyone here is having the pastpapers book,cud u plz explain what is the answer for June 2000 PAper 1 Mcq....part 3

Which Topic ??

 

[a.abid]

konse topic se hai.. ?? meray pas topical hai

yar chromatography

 

[bogus]

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

not in syllabus!

 

[syed1995]

If anyone here is having the pastpapers book,cud u plz explain what is the answer for June 2000 PAper 1 Mcq....part 3

3rd

yaar seedha hota hai .. D hai answer .. Yellow ink may be present in green ink .. baqi koi possible hi nai hai ..


4th .. ignore karo issay
Agar ye woh steam wala hai .. tu answer C hai .. pahlay tu cooling curve hai .. ooper say neechay aayega .. dosra 2 jagah constant hoga temperature .. when gas turns to liquied and liquied turns to solid ..

 

[SomeStudent]

a monomer has double bond . a repeat unit is enclosed by brackets and has single bonds with two empty bonds on each side .

Hope you get it!

righty! Got it! thanks!

 

[Mayedah]

yar chromatography

D is the only possible answer to it !

 

[SomeStudent]

Oh another one, for how many decimal places we have to calculate the empirical formula?

 

[syed1995]

Oh another one, for how many decimal places we have to calculate the empirical formula?

wasn't the emperical formulae in whole no's ??