ICSE − Q & A

i am not abl eto see the answers.. you guys posted.. whats wrong

the following questions are related to chemistry:
1)name 2 metallic carbonates that are stable towards heat.
2)a set of compounds having same general formula,similar methods of preparation and similar chemical properties.
3)what is the physical state of phosphorous penta chloride and phosphorous trichloride(both are not in same state)
4)name the first transition element
5)find the odd one out:
boron,carbon,neon,sulphur(your choice should not be on the basis of valency)
6)name the compound used to bleach silk and the bleaching action is by the process of reduction
7)name the compound formed from its dry gases in the presence of sun light
8)choose the odd one out:
Nacl,MgO,CaF2,HCl
HCl,NH3,SO2,H2S
9)NAME THE most common freon
10)the bonding present in pcl3 and pcl5 is 
11)give reasons why the solution of ferric chloride is acidic in nature.
12)the temperature of gases is lowered before they enter into oxidation chamber during ostwald's process.WHY?
13)NAME A GREEN COLOURED COMPOUND WHICH ON HEATING CHANGES TO BLACK
14)name a salt soluble in ammonium acetate
15)a solution which readily absorbs carbon di oxide
16)write the missing word or words in order to make the below statements completely correct:
a)calcium chloride is used in desiccator(im sorry.. bt wts desiccator?)
b)zinc oxide is yellow when hot and white when cold(i think the statewment is right... correct me if i am mistaken
17)write two balanced equations for the conversion of ammonia to nitrogen
18)the insoluble solid formed when 2 solutions are mixed together
19)which 2 chemical compounds are added to pure bauxite at the time of electrolytic reduction and WHY?
20)METAL(A) in the presence of chlorine, gives out reddish brown scales(B) which give out reddish brown precipitate(C) in the presence of sodium hydroxide solution...
in this context::
a)name A,B and C
b)what are the conditions for the reaction btwn metal(A) and cl to get reddish brown scales?also give the equations for all the conversions took place..
21)gas a with gas b in the presencee of burning magnesium gives compound c..gas a and gas b directly mix to give alkaline gas d
a)name a,b and c
b)name the process when gas a combines directly with b to form alkaline gas D

PLEASE REPLY AS SOON AS POSSIBLE..AS FAR AS POSSIBLE RY TO GIVE EQUATIONS ALSO..THANKS AND REGARDS....

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