Chemistry Paper 1

[Naruto]

hey
When i was going through the papers i didn't got the answer for the following questions and i guess the answers that i have are wrong so  can anyone tell me the answer and explian it too. Thanks

The answers that i have are:
16 is D
19 is C
39 is B

If you think these answers are correct then plzz explain and if not then what is the right answer? and again explain

I have attached the questions

[Wahab09]

16 i aint sure of but i say its
B

19 is definatly B as it contains an iodide which turns yellow.
39 is C as the number of molecules havent changed.. 2 carbons which weigh 12 and 4 hydrogens = Mr of 28
and the same thing for polyethene the Mr hasnt changed.

[esso]

16 i aint sure of but i say its
B

19 is definatly B as it contains an iodide which turns yellow.
39 is C as the number of molecules havent changed.. 2 carbons which weigh 12 and 4 hydrogens = Mr of 28
and the same thing for polyethene the Mr hasnt changed.

please dont answer if ur not sure of ur answers.....16 is D
19 is B
39 is B.....100 percent sure

[susman]

19 is B 39 is B
and as for the 16 part my guess is that it isC
It cant be D because the time has started but the reaction hasnt..
it cant be A because th reaction has to slow down to come on an end
it cant be B because the speed of reaction is greatest when the aprticles have most energy/concentration..
so it is C (i guess)

+ rep if u like it
bcoz already mine is in minuses

[shafeeqshazana]

nope.
16 is b
19 b
39 b

without doubts

[zara]

nope.
16 is b
19 b
39 b

without doubts

can u plz explain ur answers to 16 and 39

Thanks..

[Depriviated]

are u guys talking about chem p1 09 june or some other
if u are i would like to tell u plz dont leak answers

[zara]

are u guys talking about chem p1 09 june or some other
if u are i would like to tell u plz dont leak answers

ooyyeee....these r past pprs ques...v hv doubt in it...
no one has don't chem p1 newhere in the world...its on 10th for everybody...

so plz if u cn explain id aapreciate...Thanks..

[mayyoya92]

16 is d for sure ,because during explosions very strong heat is released immediately and not gradually . so it increase and after explosions it decreases again

[Wahab09]

guys.. how the hell is 39 B..
its C for sure..

how the hell can u even get an empirical formula without knowing the % and stuff..

molecular formula is the same..
c 12 and c 12 make 24
h-h-h-h= 4

24+4 = 28..

the same with polyethene!

[idk]

ok well first 19 should be K₂SO₄ as yellow ppt produce by sulphur.
 16 according to me should be B as first the explosion reaction will cause inc. in rate of R_X but then reaction will stabilise but continue at a certain speed.this can be seen in nuclear reactors too and thats why boron rods are put to regulate the speed of reaction.39 i think should be B as no matter what happens there will be 2 atoms of c and 4 atoms of h in 'n' number of molecules too.hope this helps.

[nid404]

19 is B
39 is B
16 is D(after a lot of research on explosion and reaction rate)

[Ghost Of Highbury]

i think the 39 answer is B
In an addition polymerisation unsaturated monomer units react together to form a polymer with essentially the same empirical formula as the monomer

[Ghost Of Highbury]

for the 16th one i think its (b)

[jennie]

16 = C
19 = B
39 = B