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Tanmai
Subject: Chemistry
, asked on 31/1/15
when 3 mole of a and 1 mole of b are mixed in 1 litre vessel reaction takes place as a+b=2c 1.5 moles of c are formed the equilibrium constant is
Answer
9
Vatsal Bhateria
Subject: Chemistry
, asked on 12/4/18
The equilibrium constant of the reaction A2 +B2 = 2AB at 100 C is 50 . If one litre fladk containing one mole A2 is connectef to a two litre flask containing two moles B2 then how many moles of AB will be formed at 373k ?
Answer
11
Anushka .
Subject: Chemistry
, asked on 15/9/17
34.
$PC{l}_{5}\left(g\right)\rightleftharpoons PC{l}_{3}\left(g\right)+C{l}_{2}\left(g\right)$
In above reaction at equilibrium condition mole fraction of PCl
_{5}
is 0.4 and mole fraction of Cl
_{2}
is 0.3. Then find out mole fraction of PCl
_{3}
.
1. 0.3 2. 0.7 3. 0.4 4. 0.6
Answer
1
Anushka .
Subject: Chemistry
, asked on 18/9/17
For
${\mathrm{N}}_{2}{\mathrm{O}}_{3}\rightleftharpoons \mathrm{NO}+{\mathrm{NO}}_{2}$
, if total pressure is P atm and amount of dissociation is 50%, the value of K
_{p}
will be
(1) 3 P (2) 2 P (3)
$\frac{\mathrm{P}}{3}$
(4)
$\frac{\mathrm{P}}{2}$
Answer
1
Anushka .
Subject: Chemistry
, asked on 17/9/17
If K
_{p}
for the reaction
${\mathrm{N}}_{2}{\mathrm{O}}_{4}\rightleftharpoons 2{\mathrm{NO}}_{2}$
is 0.66 then what is the equilibrium pressure of N
_{2}
O
_{4}
. (Total pressure at equilibrium is 0.5 atm)
(1) 0.168 (2) 0.322 (3) 0.1 (4) 0.5
Answer
1
Anushka .
Subject: Chemistry
, asked on 18/9/17
Solve this:
25.
When heating PCl
_{5}
then it decompose PCl
_{3}
and Cl
_{2}
in form of gas, The vapour density of gas mixture is 70.2 and 57.9 at 200
$\xb0$
C and 250
$\xb0$
C. The degree of dissociation of PCl
_{5}
at 200
$\xb0$
C and 250
$\xb0$
C is
(1) 48.50% & 80% (2) 60% & 70%
(3) 70% & 80% (4) 80% & 90%
Answer
1
Anushka .
Subject: Chemistry
, asked on 2/11/17
ka for cyano acetic acid is 3.5 ? 10-3. then the degree of hydrolysis of 0.05 M sodium cyano acetate solution will have the following value
answer- 7.559 ? 10-6
Answer
1
Anushka .
Subject: Chemistry
, asked on 15/9/17
36. The dissociation of CO
_{2}
can be expressed as 2CO
_{2}
$\rightleftharpoons 2CO+{O}_{2}$
. If the 2 mol of CO
_{2}
is taken initially and 40% of the CO
_{2}
is disscoiatated completely. What is the total number of moles at equilibrium:-
$1.2.42.2.03.1.24.$
5
Answer
1
Manish Sakalkar
Subject: Chemistry
, asked on 7/2/16
calculate Kc and Kp for the reaction at 295K, N2O4 ------------>2NO2
if the equilibrium concentration are [N2O4]=0.75 and [NO2]=0.062M, R=0.08206L at K-1 mol-1
Answer
1
Anushka .
Subject: Chemistry
, asked on 2/11/17
if the molar concentration of pbl2 is 1.5? 10-3 moL-1 then the concentration of iodide ions in g ionL-1 is
Answer
1
Anushka .
Subject: Chemistry
, asked on 16/9/17
Q43:
43.
Evaluate K
_{p}
for the reaction : H
_{2}
+ I
_{2}
$\rightleftharpoons $
2HI, If 2 moles each of H
_{2}
and I
_{2}
are taken initially. The equilibrium moles of HI are 2.
(1) 2.5 (2) 4 (3) 0.25 (4) 1.0
Answer
1
Athang Satav
Subject: Chemistry
, asked on 14/12/17
Pls solve
Q). At
$90\xb0C$
, the pH of 0.1 M NaCl aqueous solution is :-
(1) < 7
(2) > 7
(3) 7
(4) 0.1
Answer
2
Athang Satav
Subject: Chemistry
, asked on 8/12/17
The equilibrium constant (K
_{c}
) for the reaction
$2HCl\left(g\right)\leftrightarrow {H}_{2}\left(G\right)+C{l}_{2}\left(g\right)$
is 4*10
^{-34}
at 25
^{o}
C.
What is the equilibrium constant for the reaction
$\frac{1}{2}{H}_{2}\left(g\right)+\frac{1}{2}C{l}_{2}\left(g\right)\leftrightarrow HCl\left(g\right)$
(1) 2*10
^{-17}
(2) 2.5*10
^{33 }
(3) 5*10
^{6}
(4) NOT
Answer
2
Anushka .
Subject: Chemistry
, asked on 18/9/17
Solve this:
Q. How many moles per litre of
$PC{l}_{5}$
has to be taken to obtain 0.1 mol of
$C{l}_{2}$
, if the value of equilibrium constant
${K}_{c}$
is 0.04?
(1) 0.15
(2) 0.25
(3) 0.35
(4) 0.05
Answer
1
Athang Satav
Subject: Chemistry
, asked on 15/12/17
Please solve
Q. 0.05 M ammonium hydroxide solution is dissolved in 0.001 M ammonium chloride solution . What will be the
$O{H}^{-}$
ion concentration of this solution :
${K}_{b}\left(N{H}_{4}OH\right)=1.8\times {10}^{-5}$
$\left(1\right)3.0\times {10}^{-3}\left(2\right)9.0\times {10}^{-4}\phantom{\rule{0ex}{0ex}}\left(3\right)9.0\times {10}^{-3}\left(4\right)3.0\times {10}^{-4}$
Answer
1
1
2
3
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What are you looking for?

In above reaction at equilibrium condition mole fraction of PCl

_{5}is 0.4 and mole fraction of Cl_{2}is 0.3. Then find out mole fraction of PCl_{3}.1. 0.3 2. 0.7 3. 0.4 4. 0.6

_{p}will be(1) 3 P (2) 2 P (3) $\frac{\mathrm{P}}{3}$ (4) $\frac{\mathrm{P}}{2}$

_{p}for the reaction ${\mathrm{N}}_{2}{\mathrm{O}}_{4}\rightleftharpoons 2{\mathrm{NO}}_{2}$is 0.66 then what is the equilibrium pressure of N_{2}O_{4}. (Total pressure at equilibrium is 0.5 atm)(1) 0.168 (2) 0.322 (3) 0.1 (4) 0.5

25.When heating PCl_{5}then it decompose PCl_{3}and Cl_{2}in form of gas, The vapour density of gas mixture is 70.2 and 57.9 at 200$\xb0$ C and 250$\xb0$ C. The degree of dissociation of PCl_{5}at 200$\xb0$ C and 250$\xb0$ C is(1) 48.50% & 80% (2) 60% & 70%

(3) 70% & 80% (4) 80% & 90%

answer- 7.559 ? 10-6

_{2}can be expressed as 2CO_{2}$\rightleftharpoons 2CO+{O}_{2}$. If the 2 mol of CO_{2}is taken initially and 40% of the CO_{2}is disscoiatated completely. What is the total number of moles at equilibrium:-$1.2.42.2.03.1.24.$5

if the equilibrium concentration are [N2O4]=0.75 and [NO2]=0.062M, R=0.08206L at K-1 mol-1

43. Evaluate K

_{p}for the reaction : H_{2}+ I_{2}$\rightleftharpoons $ 2HI, If 2 moles each of H_{2}and I_{2}are taken initially. The equilibrium moles of HI are 2.(1) 2.5 (2) 4 (3) 0.25 (4) 1.0

Q). At $90\xb0C$, the pH of 0.1 M NaCl aqueous solution is :-

(1) < 7

(2) > 7

(3) 7

(4) 0.1

_{c}) for the reaction $2HCl\left(g\right)\leftrightarrow {H}_{2}\left(G\right)+C{l}_{2}\left(g\right)$ is 4*10^{-34}at 25^{o}C.What is the equilibrium constant for the reaction $\frac{1}{2}{H}_{2}\left(g\right)+\frac{1}{2}C{l}_{2}\left(g\right)\leftrightarrow HCl\left(g\right)$

(1) 2*10

^{-17}(2) 2.5*10^{33 }(3) 5*10^{6}(4) NOTQ. How many moles per litre of $PC{l}_{5}$ has to be taken to obtain 0.1 mol of $C{l}_{2}$, if the value of equilibrium constant ${K}_{c}$ is 0.04?

(1) 0.15

(2) 0.25

(3) 0.35

(4) 0.05

Q. 0.05 M ammonium hydroxide solution is dissolved in 0.001 M ammonium chloride solution . What will be the $O{H}^{-}$ ion concentration of this solution : ${K}_{b}\left(N{H}_{4}OH\right)=1.8\times {10}^{-5}$

$\left(1\right)3.0\times {10}^{-3}\left(2\right)9.0\times {10}^{-4}\phantom{\rule{0ex}{0ex}}\left(3\right)9.0\times {10}^{-3}\left(4\right)3.0\times {10}^{-4}$