Equilibrium , Popular Questions: CBSE Class 11-science CHEMISTRY, Chemistry Part I

Narayani Upadhyaya & 1 other asked a question

Subject: Chemistry, asked on on 5/12/13

explain why cp is always greater than cv????

Neeraj Rana Miral asked a question

Subject: Chemistry, asked on on 27/2/13

why oxygen is paramagnetic in nature by molecular orbital theory

Pankaj Kumar asked a question

Subject: Chemistry, asked on on 2/11/12

what is physical equilibrium? Give two example

Ankita asked a question

Subject: Chemistry, asked on on 19/3/14

Equal volumes of two solutions pH=2 and pH=4 are mixed together.Calculate the pH of the resulting solution?

Rupesh Kumar asked a question

Subject: Chemistry, asked on on 4/4/15

how to arrange on the basis of bond angle

NO3- , NO2- NO2. and NO2+

Janani & 2 others asked a question

Subject: Chemistry, asked on on 8/12/16

3.2 moles of HI(g) were heated in a sealed bulb at 444°C till the equilibrium was reached. It's degree of dissociation was found to be 20%. calculate the number of moles of hydrogen iodide, hydrogen and iodine present at the equilibrium point and determine the value of equilibrium constant for the reaction 2HI(g) H2(g)+I2(g). Considering the volume of the container 1L.
plz answer me soon and explain

Aditya Pachauri asked a question

Subject: Chemistry, asked on on 28/11/13

the value of Kc = 4.24 at 800K for the reaction

CO(g) + H2O(g) CO2(g) + H2(g)

Calculate the equilibrium concentration of CO2 ,H2O ,CO , H2 at 800K ,if only CO and H2O are pesent initially at concentration of 0.10M each.

Kashif Yusuf asked a question

Subject: Chemistry, asked on on 28/8/14

100 ml of 0.1 N NaOH is mixed with 100 ml of 0.1 N H₂SO₄.The pH of the resultant solution is??

Kashif Yusuf asked a question

Subject: Chemistry, asked on on 28/7/14

In a closed system:A_(s)⇌2B_(g)+3C_(g) if the partial pressure of C is doubled then partial pressure of B will be??

Shahid asked a question

Subject: Chemistry, asked on on 18/10/14

two moles of NH3 gas are introduced into a previously evacuated one litre vessel in which it partially dissociate at high temperature as 2NH3-N2+3H2.at equilibrium one mole of NH3 Remain.the value of Kc is??

Shreya asked a question

Subject: Chemistry, asked on on 19/12/14

1 c.c of 0.1N HCL is added to 1L solution of NACL. the pH of resulting solutionwill be??

Nitin Gupta asked a question

Subject: Chemistry, asked on on 5/12/10

What is the pH of 10^-8 M HCl solution?

Nikhil Chaudhari asked a question

Subject: Chemistry, asked on on 22/12/11

At 90'C, pure water has [H30⁺]=10^-6mole/liter. the value of k_W at 90'C is:

10^-6
10^-8
10^-12
10^-14

Chowdhury Md. Masood asked a question

Subject: Chemistry, asked on on 10/10/15

At temperature T K, PCl₅is 50% dissociated at an equilibrium pressure of 4 atm. At what pressure it would dissociate to the extent of 80% at the same temperature:-

a) 0.05 atm
b) 0.60 atm
c) 0.75 atm
d) 2.50 atm
Kindly answer sir/mam.

Prashant K Moroliya asked a question

Subject: Chemistry, asked on on 10/12/11

Question - The pH of 0.1 M monobasic acid is 4.50. Calculate the concentration of H+, A- and HA. Also determine the values of ka and pka of mono basic acid.

Chowdhury Md. Masood asked a question

Subject: Chemistry, asked on on 24/12/15

The equilibrium A(g) + 4B(g) <--------> AB_⁴(g) is attained by mixing equal moles of A and B in a one litre vessel. Then at equilibrium:- (Kindly explain the answer also)

a) [A] = [B]
b) [A] > [B]
c) [A] < [B]
d) [AB₄] > [A]

Kindly answer sir/mam.

Kashif Yusuf asked a question

Subject: Chemistry, asked on on 4/8/14

The pH of a solution obtained by mixing 100 ml of 0.2 M CH₃COOH with 100 ml of 0.2 M NaOH will be??(given pK_a for CH₃COOH =4.74 and log 2=0.301)

Hermione Granger asked a question

Subject: Chemistry, asked on on 6/2/13

what is the formula and basicity of hydrated oxalic acid and anhydrous oxalic acid?

Aneeqa Labeeb asked a question

Subject: Chemistry, asked on on 4/1/17

For which of the following reaction, the degree of dissociation (α) and equilibrium constant (K_p) are related as

K_{p} = \frac{4 α^{2} P}{(1 - α^{2})}

?
(1)

N_{2} O_{4} (g) ⇌ 2 {NO}_{2} (g)

(2)

H_{2} (g) + I_{2} (g) ⇌ 2 HI (g)

(3)

N_{2} (g) + 3 H_{2} (g) ⇌ 2 {NH}_{3} (g)

(4)

{PCl}_{3} (g) + {Cl}_{2} (g) ⇌ {PCl}_{5} (g)

Kashif Yusuf asked a question

Subject: Chemistry, asked on on 17/8/14

K_sp of Mg(OH)₂is 4.0×10^-12.The number of moles of Mg²⁺ ions in one litre of its saturated solution in 0.1 M NaOH is??

Vidushi Kaushik asked a question

Subject: Chemistry, asked on on 31/12/15

Given that the equilibrium constant for the reaction
2SO2 + O2 ------> 2SO3
has a value of 278 at a particular temperature. What is the value of the equilibrium constant for the reaction at the same temperature
SO3 -----> SO2+ ½O2

Devendra Patil asked a question

Subject: Chemistry, asked on on 1/1/12

Q] One mole of N₂O₄(g) at 300K is kept in a closed container under one atmosphere. It is heated to 600K when 20% by mass of N₂O₄(g) decomposes to NO₂(g). The resultant pressure is??

Chowdhury Md. Masood asked a question

Subject: Chemistry, asked on on 10/10/15

For the equilibrium,

If the value of Kc is 3, the percentage by mass of iso-butanein the equilibriummixture would be:-

a) 75%
b) 90%
c) 30%
d) 60%
Kindly answer sir/mam.

Rahul asked a question

Subject: Chemistry, asked on on 24/1/16

4 moles of PCl5 dissociate at 760 k in a 2 litre flask at equilibrium .0.8 mole of Cl2 was present in the flask . The equilibrium constant would be.?

Preeti & 1 other asked a question

Subject: Chemistry, asked on on 7/3/17

The ionization constant of a base (C2H5)3N is 6.4*10^-5. calculate its degree of dissociation in its 0.1 M solution when mixed with 0.01M NaOH solution.

Namita Kulkarni asked a question

Subject: Chemistry, asked on on 9/3/15

At a certain temperature 2HI gives H2and I2(reversible reaction) .Only 50% HI is dissociated at equilibrium .The equilibrium constant is .

. asked a question

Subject: Chemistry, asked on on 13/10/14

calculate simultaneous solubility of AgCNS and AgBr in a solution of water.Ksp AgCNS=1.2*10^-12,Ksp AgBr=5*10^-13

Devanshi D Dash asked a question

Subject: Chemistry, asked on on 4/4/13

49) Which oxychloride has maximum pH?

a) NaClO b) NaClO₂ c) NaClO₃ d) NaClO₄

88) A infinite dilution the percentage ionisation for both the strong and weak electrolyes is:

a) 1% b)20% c)50% d) 100%

Mamuni Padhy asked a question

Subject: Chemistry, asked on on 14/9/14

the value of delta G for the phosphorylation of glucose in glycolysis is 13.8 kj/mol. Find the value of Kc at 298K?

Ht Dube asked a question

Subject: Chemistry, asked on on 29/6/10

The solubility product constant of Ag₂CrO₄ and AgBr are 1.1 × 10^–12 and 5.0 × 10^–13 respectively. Calculate the ratio of the molarities of their saturated solutions.

Mike asked a question

Subject: Chemistry, asked on on 18/3/17

a N2 and H2 mixture initially in a molar ratio 1:3 reached equilibrium to form NH3 when 25% of N2 and H2 reacted. If total pressure of system was 21atm. The partial pressure of NH3 at equilibrium is a N2 and H2 mixture initially in a molar ratio 1:3 reached equilibrium to form NH3 when 25% of N2 and H2 reacted. If total pressure of system was 21atm. The partial pressure of NH3 at equilibrium is

Pluto Wilson asked a question

Subject: Chemistry, asked on on 20/10/15

the value of the equilibrium constant for the reaction

H2(g)+I2(g)2HI(g)

at 720K is 48. What is the value of the equilibrium constant for the reaction

1/2H2(g)+1/2I2(g)HI(g)

Nikhil Chaudhari asked a question

Subject: Chemistry, asked on on 1/12/11

At temperature T, a compound AB₂ (g) diassociates according to the reaction :

2AB₂(g) [reverisble sign ] 2AB(g) + B₂.

with degree of dissociation, x, which is small compared to unity. Deduce the expression for x in terms of equillibrium constant K_p and the total pressure.

Soumita Kundu asked a question

Subject: Chemistry, asked on on 5/4/14

The equilibrium constants K_P1 and K_P2 for the reactions X↔2Y and Z↔P +Q, respectively are in the ratio of 1 : 9. If the degree of dissociation of X and Z be equal then the ratio of total pressure at these equilibria is

Omais . asked a question

Subject: Chemistry, asked on on 16/1/17

Calculate the degree of ionisation and ph of 0.05 M solution of a weak base having the ionization constant (Kb) is1.77 ? 10 raised to power -5 .Also calculate the ionisation constant of the conjugate acid of this base

Divya Chaudhary asked a question

Subject: Chemistry, asked on on 10/9/16

In the equilibrium SO2Cl2 is equilibrium with SO2 +Cl2 at 2000 K and 10atm pressure . %Cl2=%SO2= 40(by volume). Then Kp=8. How?

Maharshi Chakraborty asked a question

Subject: Chemistry, asked on on 31/10/12

What is an evacuated vessel? [From Comprehensive Chemistry Pg.-370]

Meethi asked a question

Subject: Chemistry, asked on on 29/10/15

When NaNO3 (s) is heated in closed vessel, oxygen is liberated and NaNO2 (s) is left behind. At equilibrium? Among options one is addition of NaNO3 (s) favors forward direction but this option isn't given correct. Correct option is increasing pressure favours reverse direction. Pls explain why isn't that option correct.

Kashif Yusuf asked a question

Subject: Chemistry, asked on on 20/8/14

When 0.1 mole of ammonia is dissolved in sufficient water to make 1 litre of solution.The solution is found to have a hydroxide ion concentration of 1.34×10^-3.The dissociaton constant of ammonia is??