Biology; Chemistry; Physics: Post your doubts here!

[peacce]

Mai to movie dekh ra hoon bhai,chemistry has abandoned me

 

[exploded diper]

Mai to movie dekh ra hoon bhai,chemistry has abandoned me

kya hai....tyaari ka koi khayal nahi......tyaari kya bohat achi hai...ajeeb inssan....

 

[exploded diper]

2NH3(g)+3CuO(s)=N2(g)+3Cu(s)+3H2O(g)

do the proeprties of plactics like l d p e cum ?
do the specific uses of man made polymers like perpex , acrilan cum?
does the normal battery cell cum ?

 

[asadalam]

do the proeprties of plactics like l d p e cum ?
do the specific uses of man made polymers like perpex , acrilan cum?
does the normal battery cell cum ?

No i guess

 

[exploded diper]

No i guess

all no?

 

[FLRNAB]

all no?

Yes they don't come. Look at the first page of the chapter and you will find the syllabus it was following. Quite different from 2014 syllabus.

 

[exploded diper]

Yes they don't come. Look at the first page of the chapter and you will find the syllabus it was following. Quite different from 2014 syllabus.

okay

 

[exploded diper]

when we use a molten elctrolyte the ions are involved in conducting electricity . right.

 

[Mahnoorfatima]

There is this question in which on a chromatography paper one spot shows two spots (something like that) and another graph where the melting point is given . It's an Mcq can we say that the chromatography one is a mixture while the other is a pure substance..???
And adding mg to dilute h2so4 , the ph wouldn't change right? And the temperature would increase ,right?
Plus the reaction of group 1 metals with water, by going down the group the reaction becomes more exo or endothermic?

 

[asadalam]

when we use a molten elctrolyte the ions are involved in conducting electricity . right.

yes

 

[Mahnoorfatima]

And in measuring the effect of concentration on rate of reaction, do we need a thermometer . It's an McQ where they ask that which one are we supposed to use, the options are a balance a clock a measuring cylinder and a thermometer. So do we use all four of them ?

 

[exploded diper]

And in measuring the effect of concentration on rate of reaction, do we need a thermometer . It's an McQ where they ask that which one are we supposed to use, the options are a balance a clock a measuring cylinder and a thermometer. So do we use all four of them ?

i guess yes..

 

[What is life]

removal of flue gases?

 

[Mahnoorfatima]

removal of flue gases?

Use an alkaline substance like calcium carbonate to remove sulphur dioxide from industries emitting this acidic gas which causes acid rain.

 

[FLRNAB]

And in measuring the effect of concentration on rate of reaction, do we need a thermometer . It's an McQ where they ask that which one are we supposed to use, the options are a balance a clock a measuring cylinder and a thermometer. So do we use all four of them ?

You need to keep other variables constant else it experimental output will be wrong.

 

[***amd***]

how do we derive the names of those esters? :/
like is methanoic acid reacts with ethanol, what ester will result? methtyl ethanoate? or ethyl methanoate?

 

[Ram97]

how do we derive the names of those esters? :/
like is methanoic acid reacts with ethanol, what ester will result? methtyl ethanoate? or ethyl methanoate?

We name the alcohol part first and then the acid followed by oate
It would be ethyl methanoate

 

[Anonymous321]

guys, in Polymerisation, do we have to memorise structures and formula besides the Nylon, Terylene and Polyethene? It's not mentioned in the syllabus, but it's there in the latest books. Also in Nylon/Terylene, do we have to memorise the reaction itself (COCl and NH2 condensing HCl)

 

[Anonymous321]

yes

Hey genius, answer my question plis?

 

[Anonymous321]

do the proeprties of plactics like l d p e cum ?
do the specific uses of man made polymers like perpex , acrilan cum?
does the normal battery cell cum ?

NO, the normal battery cell does not cum...
actually none of them cum