How was Chemistry P1/2

[pakisatan123]

can any one tell the method of preparation of copper chloride??
n the salt formed in flue gasses ques??

salt calcium nitrate

 

[hopy12345]

the statement was sulfate ions move towards the CATHODE...!! sorry i wrote it wrong b4...!! this makes it incorrect... how can sulfate be attracted towards the negative electrode?? i also chose tht option at first but then realized tht it was wrong.

 

[hopy12345]

wht was the ionic equation for formation of copper chloride from copper carbonate and HCl??

 

[M Haseeb Javed]

What was the answer to silicon mcq? In which processes was it being reduced?

I n IV

 

[pakisatan123]

hahaha i'll pray for ur A* but only if u make my gender appropriate XD

can u tell ans of pentane one more covalent bond or strong forces

 

[hopy12345]

more covalent bond

 

[Doosh Bag]

In 36 and 37 MCQs...

What was Addition reaction.. A was substitution reaction and B and C seemed like oxidation so I did S.

And in 37, I was torn between A and D but eventually chose as there was absolutely nothing wrong with the structure given.

btw for the conduction one, I also did mercury.

 

[Doosh Bag]

can u tell ans of pentane one more covalent bond or strong forces

Was either B or D but I did B.

 

[hopy12345]

i also did the strucure of methanol as the correct option..!! n i did D for addition reaction

 

[Doosh Bag]

i also did the strucure of methanol as the correct option..!! n i did D for addition reaction

Same as me

 

[madara]

hey for the methanoic acid one.........i wrote react in air.......with acidified potassium dichromate......is that good enough for 2 marks

 

[M Haseeb Javed]

0.083 kaisay aai? O_O

(MV/n)acid=(MV/n)alkali

 

[pakisatan123]

i also did the strucure of methanol as the correct option..!! n i did D for addition reaction

were the last two ans fr mcq were b b

 

[Doosh Bag]

were the last two ans fr mcq were b b

Yes. Both were B.

Hydrogen produced 1 mole.
Addition with that structure.

38 was C.

 

[M Haseeb Javed]

Greater. Cause ppt will be formed, it think so.

aree yarr.. only the atoms shifted from here to there..... Mass will stay same

 

[pakisatan123]

Yes. Both were B.

Hydrogen produced 1 mole.
Addition with that structure.

38 was C.

nd what frmethanol which thing was correct

 

[beeloooo]

Was either B or D but I did B.

pentane one was D , the forces of attraction always contribute to the boiling point !!..

while the methanol mcq was A !! it was also confirmed by the last question in p2 !! they asked for a FULL structure of methanol it was wrong as a bond between O-H was missing !! got it >? !!

yup the addition reaction was the bromine one D !!

for the people who are arguing over mercury , and the arguements they are making are pointless like it is a metal and very good conductor i can't help them !! Mercury is a fair conductor of electricity as it is a liquid it can't conduct it the way other metals do plus it is a weak electrolyte !! as u can find it everywhere when u search ! !! so it does conduct electricity but to a smaller extent and hence the light in the lamp glows dim :!)

hope it clarifies people doubts or else they can confirm that it was D from there respective teachers

 

[beeloooo]

the statement was sulfate ions move towards the CATHODE...!! sorry i wrote it wrong b4...!! this makes it incorrect... how can sulfate be attracted towards the negative electrode?? i also chose tht option at first but then realized tht it was wrong.

the confirmed option is that copper always formed at cathode !! bet on it

 

[Ahmedfj]

i also did the strucure of methanol as the correct option..!! n i did D for addition reaction

i wrote that it is oxidised to methanoic acid .. isnt that correct ?

 

[beeloooo]

Mercury is a Transition metal so its conduction is very good. Ref>Wikipedia

please search thoroughly and its wikipedia that also states that mercury is a weak electrolyte