CHEMISTRY

[Octahedral]

 

[Octahedral]

 

[Octahedral]

 

[mrpaudel]

for 32...the answer is 1 only..!!
for 9...the answer is C!!
and i have no idea how to do the remaining one..if any1 knows this..plz do xplain..!

 

[Zishi]

for 32...the answer is 1 only..!!
for 9...the answer is C!!
and i have no idea how to do the remaining one..if any1 knows this..plz do xplain..!

For 9, the answer is B. You HAVE to consider to 45% and mass per gram thing. For the remaining, it's A.

 

[angelgurl]

plz explain this:
One other question requires comment. Question 18 performed satisfactorily, but a higher proportion of
candidates, 36%, opted for the distractor B believing that heating ammonium sulphate with dilute
hydrochloric acid would liberate ammonia, rather than with limewater, only 35% choosing the key C.
(june 2003)
18 Which reagent, when mixed and heated with ammonium sulphate, liberates ammonia?
A aqueous bromine
B dilute hydrochloric acid
C limewater
D acidified potassium dichromate(VI)

isnt HCl supposed to produce ammonia?

 

[Octahedral]

@angelgurl .No HCl is not supposed to produce ammonia.Ammonium compunds ALWAYS react with alkalis to form salt,water and AMMONIA gas.So the answer would be C since limewater would react with ammonium sulphate to liberate ammonia.

 

[angelgurl]

thanks