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CHEMISTRY -- !!! HELP !!!!

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Midhun Sarath
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PostSubject: CHEMISTRY -- !!! HELP !!!! Sun Mar 15, 2009 12:51 pm

Q.1. A Gas which makes azeotropic mixture with water at certain temp.

Q.2. A Compound that is present in spurious alchohol.

Q.3.An Amphoteric hydroxide which dissolves in ammonia to give soln:

Q.4. An Oxide which shows temporary change in physical prop: when heated ?

Q.5. The Non-metal which forms two compounds on reacting with chlorine ?

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Apurva
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PostSubject: Re: CHEMISTRY -- !!! HELP !!!! Sun Mar 15, 2009 1:22 pm

1.hcl
3.i guess al(oh)3
5.i guess nitrogen
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Anu..i luv icse...:)
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PostSubject: Re: CHEMISTRY -- !!! HELP !!!! Sun Mar 15, 2009 2:08 pm

wats azeotropic mixture?

2) methyl n ethyl alcohol....both are present

3) may be zn(oh)2??? but, neither of the amphoteric hydroxides are soluble, so they should actually react with ammonium hydroxide n not ammonia to form a solution...ryt? zn hydroxide reacts with excess ammonium hydroxide to form tetramine zn hydroxide solution......i dunno...this is a guess.....plz help!

4)lead as well as zinc oxide.

5) phosphorus-trichloride and pentachloride. or hydrogen-HCl and HClO.
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Apurva
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PostSubject: Re: CHEMISTRY -- !!! HELP !!!! Sun Mar 15, 2009 2:35 pm

anu azotropic mixture is d other term for constant boilin mixture
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Anu..i luv icse...:)
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PostSubject: Re: CHEMISTRY -- !!! HELP !!!! Sun Mar 15, 2009 2:36 pm

k..then, it can be hcl or hno3or h2so4 right?
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Midhun Sarath
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PostSubject: Re: CHEMISTRY -- !!! HELP !!!! Sun Mar 15, 2009 3:03 pm

thank u very much.. anu and apurva Happy Happy Happy
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Arya Nair
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PostSubject: Re: CHEMISTRY -- !!! HELP !!!! Sun Mar 15, 2009 6:39 pm

thanks for the questions and answers
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abhi_1993
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PostSubject: Re: CHEMISTRY -- !!! HELP !!!! Sun Mar 15, 2009 6:46 pm

1. hcl
2. methanol (and ethanol)
3. ya..ammonia shud be in solution...ans is Zinc hydroxide
4.ZnO/PbO (it changes colour)
5.uh...im not sure...but i guess it shud be Phosphorus...but anyway..i dont think need to know too much detail about chlorine
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Midhun Sarath
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PostSubject: Re: CHEMISTRY -- !!! HELP !!!! Sun Mar 15, 2009 9:09 pm

yes.. I got.. the last 1 is phosphorous... as anu said.... ... btw thank u abhi and arya... Very Happy
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