test questions from me

[Chem_master]

Q: why is aluminum less corrosive then iron?
Q: why do ionic compounds have high melting/boiling points?
Q: name the force that attracts each molecule in all covalent substance.
Q: name the process in which algae grows on fresh water due to presence of fertilizer and results in the reduction of marine life.
Q: why is argon blowed into the reactor when sodium reacts with titanium(IV)chloride TiCl4
answer these five questions to test urself! .......more soon :twisted:

 

[XPFMember]

i can.....but i'm in AS now....so better let others try

 

[roneyms]

Q: why is aluminum less corrosive then iron?
A:Haven't covered it yet I think.Or is it because one is a metal and one is a ..nvm
Q: why do ionic compounds have high melting/boiling points?
A:Because they have strong intermolecular forces of attractions.
Q: name the force that attracts each molecule in a covalent substance.
A:Van der Wall's forces
Q: name the process in which algae grows on fresh water due to presence of fertilizer and results in the reduction of marine life.
A:Haven't covered
Q: why is argon blowed into the reactor when sodium reacts with titanium(IV)chloride TiCl4
A:Haven't covered or I forgot?

 

[MAVtKnmJ]

1) Aluminium has an oxide layer
2) Inter molecular forces are strong
3)Van der Wall's forces
4) Eutrophication
5) To make an inert environment / reduce reactivity

 

[Chem_master]

keep guessing guyz....
math angel....answer them....
roneyms u got 1 answer correct
MAVtKnmJ u got 3 answers correct

 

[XPFMember]

keep guessing guyz....
math angel....answer them....
roneyms u got 1 answer correct
MAVtKnmJ u got 3 answers correct

OK here I go

Q: why is aluminum less corrosive then iron?

----It's because of the protective layer it forms...which helps resist corrosion!!

Q: why do ionic compounds have high melting/boiling points?

----it's bcoz of the strong attraction between the positive and negative ions

Q: name the force that attracts each molecule in a covalent substance.

----intermolecular forces

Q: name the process in which algae grows on fresh water due to presence of fertilizer and results in the reduction of marine life.

----Eutrophication

Q: why is argon blowed into the reactor when sodium reacts with titanium(IV)chloride TiCl4

----hmmm...this one i dont know

 

[Chem_master]

math angel ur score is 3.....go check the post "test question form me part II" for correct answers

 

[XPFMember]

hey by the way for Q:3 vander waal's forces is an intermolecular force and btw y is it only vander waal forces in particular?? y not permanent dipole dipole or hydrogen bond..?? cuz name of a compound isnt given

 

[Chem_master]

math angel focus on the question: i asked the NAME of the intermolecular force....

 

[XPFMember]

by the way it says name the force...and now i got it.....it actually depends on the compound it's not always van der waals but...i understood...the answer to my question is...this all is there for A levels...i mean the type of intermolecular forces....so for this level i think that's alright or might be i'm wrong...cuz i too have just studied this topic recently but i dont think so

 

[Chem_master]

.hhmmm..well!...i thnk so that i shud ammend the question a bit....

 

[hassam]

@ chem master........if u have'nt met this b4 then try it must
this is one of the most frequently asked equation in o level paper (mcqx)
Copper+nitric acid---->copper(II)nitrate+nitrogen dioxide(no2)+h2o
try balancing it.......its smwhat tough from the normal ones u try.....

 

[roneyms]

keep guessing guyz....
math angel....answer them....
roneyms u got 1 answer correct
MAVtKnmJ u got 3 answers correct

Ehm didn't I get two correct? :/

I mean my no.2 and no.3 was correct.

 

[SAUD ASLAM]

Q: why is aluminum less corrosive then iron?
Q: why do ionic compounds have high melting/boiling points?
Q: name the force that attracts each molecule in all covalent substance.
Q: name the process in which algae grows on fresh water due to presence of fertilizer and results in the reduction of marine life.
Q: why is argon blowed into the reactor when sodium reacts with titanium(IV)chloride TiCl4
answer these five questions to test urself! .......more soon :twisted:

1) because of more reactivity it form a protective layer of Aluminium oxide.
2)its force of attractions due to tarnsfer of electrons is higher.
3)Van der waal
4)Eutrophication
5)no idea......but as argon is non reactive it can be blown as medium of reaction

 

[Chem_master]

check the post "test questions form me part II" for write answers...
hassam...that's easy check if my answer's write..
Cu + 4HNO3 = Cu(NO3)2 + 2NO2 + 2H2O
saud u got 3 correct

 

[MAVtKnmJ]

The answers you provided and the ones I gave are same. You simply gave them in a little different perspective and a bit of different / detailed wording ...

Oh well, moving on!

 

[jamil_007]

hey chem master which reactor u r using in the last reaction and question about argon??

 

[Chem_master]

it's a unanimous choice jamil......the question has no concern with the type of reactor