|
Author
|
Message
|
![[Post New]](/templates/default/images/icon_minipost_new.gif)
4 Jan 2008 22:36:23 IST
|
|
|
Which of the following statements explains why a definition of standard state conditions is needed in electrochemistry? - Cell potentials vary with concentration.
- Cell potentials vary with temperature.
- Cell potentials vary with partial pressures of gases.
- Responses (a) and (c) are correct.
- Responses (a), (b) and (c) are all correct
|
Ken
From: UNITED STATES, Green Bay, Wisconsin
 |
this reply:
2 points
(with 0
in
1
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
4 Jan 2008 22:37:03 IST
|
|
|
Which of the following expressions correctly describes the relationship between the rates at which NO2 and Cl2 are consumed in the reaction below? 2 NO2(g) + Cl2(g) --> 2 NO2Cl(g) 
|
Ken
From: UNITED STATES, Green Bay, Wisconsin
|
this reply:
10 points
(with 2
in
2
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
4 Jan 2008 22:37:32 IST
|
|
|
Results of a 1985 analysis of a piece of parchment indicated that 97.6% of the carbon-14 that was present initially still remained in the sample. With which of the following battles is this sample likely to be associated? The rate constant (k) for the first-order decay of carbon-14 is 1.21 x 10-4/year. - Battle of Actium in 31 BC, Octavian defeating Mark Anthony.
- Battle of Lugdunum (Lyon), 197 AD, Septimius Severus defeating Clodius Albinus.
- Battle of Hastings, 1066 AD, William of Normandy defeating Harold II of England.
- Battle of Yorktown, 1781 AD, the Marquis de Lafayette defeating Lord Cornwallis.
- Battle of Waterloo, 1815 AD, the Duke of Wellington defeating Napoleon Bonaparte.
|
Ken
From: UNITED STATES, Green Bay, Wisconsin
|
this reply:
5 points
(with 1
in
1
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
9 Jan 2008 22:35:28 IST
|
|
|
PARAGRAPH QUES Luk at de chart given below n ans de ques Q1) Rxn frm A  B & B C are xampls of (1) Electrophilic & Nucleuphilic substitution respectively (2) Both Electrophilic substitution (3) Both Nucleuphilic substitution (4) Nucleuphilic & Electrophilic substitution respectively Q2) Coumpound D is (1) Ortho and para bromophenol (2) 2,4,6 tribromo phenol (3) 1,3,5 tribromo benzene (4) 2,4,6 tribromo benzene Q3) When E is heated with NaOH then the products are (1) Sodium Acetate and salol (2) Aspirin & sodium acetate (3) Oil of winter green and sodium acetate (4) Sodium Acetate and sodium salicylate
|
--------------------------------------------------------------------
Even though the sky seems dark, believe in the future.
The storm will pass over. The clouds will roll by.
Believe in the best though it seems hidden. Know that it will come though it's not in sight.
Your faith will take you through the darkness.
Your belief shall prove that the sun will shine again. |
this reply:
5 points
(with 1
in
1
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
9 Jan 2008 23:06:43 IST
|
|
|
500 mo pf 0.2 M aq. soln. of acetic acid is mixed with 500 ml of 0.2 M Hcl at 25degrees (i) Calc the degree of dissn of acetic acid in the resulting soln and pH oh the sol (ii)If 6 g of NaOH is added to the above soln determine the final pH(assuming there is no change in vol of mixing, Ka of acetic acid is 1,.75 X 10^-5 mol/lit
|
this reply:
5 points
(with 1
in
1
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
12 Jan 2008 09:50:27 IST
|
|
|
The value of Vander Waal?s constant ?a? for gases O2, N2, NH3 and CH4 are 1.360, 1.390, 4.170
and 2.253 litre2 atm mol?2 respectively. The gas which can most easily be liquified is
(A) O2 (B) N2
(C) NH3 (D) CH4
ans is (C)
|
" You get What u deserve and not what you desire"
R.darshan kumar |
this reply:
10 points
(with 2
in
2
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
25 Jan 2008 02:01:29 IST
|
|
|
What is the temperature to which a gas must b cooled
before it can b liquidified by compression is called?
a.)Inversion temperature
b.)Critical temperature
c.)Neutral temperature
d.)Curie point
Answer given is a.
|
__________________________________________________________________________________________________________
From J.R.R. Tolkien's 'The Lord of the Rings':
All that is gold does not glitter
Not all who wander are lost
The old that is strong does not wither,
Deep roots are not reached by frost.
From ashes a fire shall be woken
From shadows a light shall spring
Renewed shall be blade that's broken
The crown less again shall be king. |
this reply:
2 points
(with 0
in
1
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
25 Jan 2008 18:21:06 IST
|
|
|
gaseous benzene reacts with hydrogen gas in the presence of nickel catalyst to form gaseous cyclohexane. a mixture of C6H6 and excess H2 has a presure of 60mm Hg in an unknown volume. after the gas has been passed over Ni and all the benzene converted to cyclohexane, the pressure of the gas was 30 mm Hg in the same volume and temperature.the fraction of C6H6(by volume) in the original volume is: a)1/3 b)1/4 c)1/5 d)1/6 ans :(d)1/6 !!!!!!!!!!!!!!
|
Varsha
be cool,
tomorrow is what we make it today,
so if u can dream it , u can make it .
life is an ice cream ,eat it before it melts away!!!!!!!!!
    
 
|
this reply:
5 points
(with 1
in
1
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
25 Jan 2008 22:44:25 IST
|
|
|
multiple choice questrion
strength of a acid is directly proportional to
i ka
ii poh
iii ph
iv[ H+]
|
this reply:
2 points
(with 0
in
1
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
25 Jan 2008 22:59:02 IST
|
|
|
have you guesse the answer
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
25 Jan 2008 23:02:04 IST
|
|
|
one more question
N2O4 and NO2 are in equilibrium at 300 C.the equilibrium pressures of NO2 and N2O4 are 0.55atm and 0.14attm respectively.when the volume is doubled then find the new pressuers.
|
this reply:
2 points
(with 0
in
1
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
25 Jan 2008 23:03:21 IST
|
|
|
though the answer is not supposed to be solved here u can mention it if u want
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
25 Jan 2008 23:06:36 IST
|
|
|
answer for the first one is i,ii and iv
second's answer.its better if others solve and give me the answer.
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
25 Jan 2008 23:08:35 IST
|
|
|
see plzzz ask for the soln (detailed sol )...
to be nudged to u
the soln should not be posted here
but the answer(only answer)
can be posted
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
|
|
Moderation Team
Community Discussion Question:
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
![[Thumb - cheM_org.JPG]](/upload/2008/1/9/bc7ff2c193c187edebd8edfeb05f98bf_32058.JPG_thumb)
