Equilibrium, Popular Questions: CBSE Class 11-science SCIENCE, Science

Narayani Upadhyaya & 1 other asked a question

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

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

Akash Patel asked a question

Subject: Chemistry, asked on on 28/2/18

Q. Determine pH of a 0.01 M aqueous solution of

C l C_{6} H_{4} N H_{3} C l :

Given : Kb(

C l C_{6} H_{4} N H_{2}

) = 4 x

10^{- 13}

, log 19 = 1.3, log 2 = 0.3,

\sqrt{16.25}

=4.02
(A) 2.1
(B) 2.5
(C) 3.5
(D) 3.1

Neeraj Rana Miral asked a question

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

why oxygen is paramagnetic in nature by molecular orbital theory

G Gayatri asked a question

Subject: Chemistry, asked on on 28/2/14

what is the conjugate base of CN^-

Pankaj Kumar asked a question

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

what is physical equilibrium? Give two example

Ayesha Almaas asked a question

Subject: Chemistry, asked on on 24/2/15

Calculate the dissociation constant of conjugate acid of (CO3)2-. Kb= 2.1× 10^-4

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?

Shalini Devanand asked a question

Subject: Chemistry, asked on on 25/12/18

Pls sns this fast

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+

Mahek Harwani asked a question

Subject: Chemistry, asked on on 12/2/19

calculate the ph of 0.01 M Al(OH)3 solution

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

Chowdhury Md. Masood asked a question

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

For the reaction equilibrium, 2 NOBr(g)2 NO(g) + Br₂(g) . If P_Br2= P/9 at equilibrium and P is total pressure, the ratio of Kp/P is equal to (The ones marked in blue, those steps I couldn't understand , please explain it )

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.

Kavita asked a question

Subject: Chemistry, asked on on 19/12/17

Which can act as buffer :-
(1) NH₄OH + NaOH
(2) HCOOH + CH₃COONa
(3) 40 mL 0.1 M NaCN + 20 mL of 0.1 M HCl
(4) None of them

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??

Sukhmanpreet Kaur asked a question

Subject: Chemistry, asked on on 9/8/16

calculate the pH of 0.04M solution of NH4Cl if pk_bof NH3 is 4.74

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??

Vaibhav Gupta asked a question

Subject: Chemistry, asked on on 14/11/12

Is SnCl₄ a Lewis acid or a base???

Arrange the following Bronsted Acids in increasing acidic strength,Give Reason for your choice :

1)HCl,HBr ,HI,CH₃COOH,HCO₃,H₂O

2)HCOOH,C₆H₅COOH,CH₃COOH

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??

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%

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??

Sanchit Mehta asked a question

Subject: Chemistry, asked on on 14/9/18

if some he gas is introduced into equilibrium pcl5=pcl3+cl2 at const pressure and temp then kc will
increase
decrease
unchanged
none

Nitin Gupta asked a question

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

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

Visalakshi Cho asked a question

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

how to solve x = antilog (-5.4)

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

Abhishek asked a question

Subject: Chemistry, asked on on 19/11/18

I have not understand how the ratio of dissociated h20 to the undissociated h20 is that what is the logic behind it and sir what does it mean that equilibrium lie mainly toward undissociated water

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.

Rd asked a question

Subject: Chemistry, asked on on 6/3/15

Consider the following endothermic reaction: CH4(g) + H2O(g) > CO(g) + 3H2(g) at equilibrium. How will the equilibrium be affected by increasing temperature and pressure?

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.

Aishwarya Jee asked a question

Subject: Chemistry, asked on on 3/1/17

What do you mean by cationic and anionic hydrolysis?

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)

Abhiroop Dey asked a question

Subject: Chemistry, asked on on 11/8/13

Is studying Chemical Kinetics necessary for understanding The chapters of Equlibrium? Namelsy, Ionic and Chemical?My seniors told me that it would be of help for me to go through the Chemical Kinetics chapter before I start with Ionic Equilibrium!Thanks in advance!

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?

Kashif Yusuf asked a question

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

The following reactions are known to occur in the body

CO₂+H₂O⇌H₂CO3⇌H⁺+HCO3

What will happen if CO₂ escapes from the system??

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)

Disharee Sen asked a question

Subject: Chemistry, asked on on 6/10/18

A mixture of 0.1 mole of NO,0.05 mole of H2 and 0.1 mole of H2O is placed in one litre vessel to attain the equilibrium, 2NO+2H2=N2+2H2O . At equilibrium [NO]=0.062M. Calculate )a the equilibrium of concentration of each gas and b)Kc for the change

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??

Anmol asked a question

Subject: Chemistry, asked on on 1/11/16

Electronegativity difference is directly proportional to acidic strength. But ionic bonds are stronger than covalent bonds, making it harder for compounds having high electronegativity difference to donate proton. Then how is this possible ? Explain in detail.

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

Aditya Singhal asked a question

Subject: Chemistry, asked on on 20/1/13

what is the pH of solution when 0.2 mole of NaOH is added to one litre of a solution containing one mole each of NH3 and NH4Cl?

Kb for NH3 is 1.8 * 10 ^-5. assume the total volume remains one litre

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??

Neha Ragesh Nambiar asked a question

Subject: Chemistry, asked on on 30/11/17

A certain ideal gas has C_v.m = a + bT, where a = 25.0 J/(mol. K) and b = 0.03 J (mol. K²). Let 2 mole of the gas go from 300 K and 2.0 litre volume to 600 K and 4.0 litre. ΔS_gas is
(1) 32.08 J/K (2) –12.08 J/K (3) 64.17 J/K (4) None of these

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.

Aswathi Aerath Vinayachandran asked a question

Subject: Chemistry, asked on on 9/5/13

The solubility of salts of weak acids increases at lower pH. Can you explain the derivation in textbook?

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.?

Khalid Abeer asked a question

Subject: Chemistry, asked on on 11/3/14

Calculate the degree of ionization of 0.01M solution of HCN.Ka = 4.8 X 10-10.Also calculate H⁺ion concentration of the solution

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.

Pratyush asked a question

Subject: Chemistry, asked on on 16/9/17

Q 25 equilibrium

Q25. In a 7.0 l, evacuated chamber, 0.50 mol H₂ and 0.50 mol l₂ react at 427

°

C.

H₂(g) + l₂(g)

⇌_{}^{}

2HI (g). At the given temperature, K_c= 49 for the reaction.

(i) What is the total pressure (atm) in the chamber?

(A) 83.14 (B) 831.4 (C) 8.21 (D) None

(ii) What is the value of K_p?

(A) 7 (B) 49 (C) 24.5 (D) None

(iii) How many moles of the iodine remain unreacted at equilibrium ?

(A) 0.388 (B) 0.112 (C) 0.25 (D) 0.125

(iv) What is the partial pressure (atm ) of Hl in the equilibrium mixture ?

(A) 6.385 (B) 12.77 (C) 40.768 (D) 646.58

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 .

Sonal Chaudhary asked a question

Subject: Chemistry, asked on on 16/3/13

the dissociation of H₂S is suppresed by the presence of HCl explain why

. 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

Janaki asked a question

Subject: Chemistry, asked on on 29/1/19

what are the conjugate acids of CH3OH and CH3O-. are they strong acids? why?

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?

Rikhish Khumanthem asked a question

Subject: Chemistry, asked on on 1/5/19

What is the molarity of 1N H2SO4 solution?

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.

Anu Rathna asked a question

Subject: Chemistry, asked on on 28/10/12

whats the basic difference between concentration and composition?

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

Manisha Mohanty asked a question

Subject: Chemistry, asked on on 9/11/14

ARE ALL SALTS STRONG ELECTROLYTES OR THERE ARE SOME WEAK ELECTROLYTES WHICH ARE SALTS?

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)

Chris & 1 other asked a question

Subject: Chemistry, asked on on 16/2/16

What is basic principle behind the systematic analysis of cations and group separation? Explain.

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.

Rajnin Nanda asked a question

Subject: Chemistry, asked on on 4/4/16

In the equilibrium mixture CaCO3(s) -----> CaO (s) + CO2 (g) at 27 °C is 2 atm. What will be the pressure of CO2 when 2 moles of CO2 are added to equilibrium mixture. (Ans is 2 atm please explain how?)

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

Maharshi Chakraborty asked a question

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

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

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

Lipika Ajith asked a question

Subject: Chemistry, asked on on 13/1/17

10m³ of butane at 1.2atm was required to be stored at 6atm pressure. To what volume must the gas be compressed to give the required storage pressure at constant temperature.

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?

Abinash Panigrahi asked a question

Subject: Chemistry, asked on on 30/9/17

Why HCN is.more acidic then H20..
18. The correct- order of acidic strength is

(1) {CH}_{3} COOH < HCN < H_{2} O < C_{2} H_{5} OH (2) {CH}_{3} COOH > HCN > H_{2} O > C_{2} H_{5} OH (3) HCN > {CH}_{3} COOH > H_{2} O > C_{2} H_{5} OH (4) {CH}_{3} COOH > HCN > C_{2} H_{5} OH > H_{2} O

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??

Rohan asked a question

Subject: Chemistry, asked on on 9/1/17

Derive an expression for ionisation constant for ionisation of a weak acid and its degree of ionisation?

. asked a question

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

Ksp(BaSO4)= 1.5*10-9. find solubility in a)pure water b)0.1 M BaCl2 solution

Harsha S asked a question

Subject: Chemistry, asked on on 17/1/15

(i)what happens to the blood red colour when oxalic acid is added to the equilibrium reaction Fe⁺³ + SCN^- -----> [Fe(SCN)]⁺² ?
(ii) what happens to the intensity of blood red colour if Hg is added to the above reaction ?

Varshini & 1 other asked a question

Subject: Chemistry, asked on on 21/8/15

In an equilibrium A + B C + D; A and B are mixed in a vessel at temperature T. Theinitial concentration of A was twice the initial concentration of B. After the equilibrium has

reached, concentration of C was thrice the equilibrium concentration of B. Calculate KC.

Aakash Kumar asked a question

Subject: Chemistry, asked on on 31/10/13

1)- What is the pH of10^-8 (N) HCl?

Subhashree Panda & 1 other asked a question

Subject: Chemistry, asked on on 26/12/15

46) A sample of Na2CO3.H2O weighing 0.62g is added to 100ml of 0.1N H2SO4 solution. What will be the resulting solution

a) Acidic b) NEUTRAL c) BASIC

Priyankaparthan asked a question

Subject: Chemistry, asked on on 26/12/16

The ratio of Kp/Kc for reaction
CO (g) + 1/2 O2 equlibrium equal is Co2 (g) is

Ratna Manjula asked a question

Subject: Chemistry, asked on on 7/11/13

How CH3COONa is a strong electrolyte?

munmunbhatele... asked a question

Subject: Chemistry, asked on on 26/11/13

an excess of agno3 is added to 100 ml of a 0.01 M solution of [cr(h2o)4cl2]cl.the number of agcl precipated would be:

is this question based on common ion effect

Kashif Yusuf asked a question

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

The dissociation constant of a weak acid HA and weak base BOH are 2×10^-5 and 5×10^-6respectively.The equilibrium constant for the neutralization reaction of the two is ( ignore hydrolysis of resulting salt)

Yuvraj asked a question

Subject: Chemistry, asked on on 12/5/16

What is the active mass of 5g CaO?

Akash Patel asked a question

Subject: Chemistry, asked on on 28/2/18

Q. Some statements are given for the following equilibrium.
N

H_{4}

HS(s)

⇌

N

H_{3}

(g) +

H_{2}

S(g) ;

△

H = +ve

S_{1}

: On increase in temperature, equilibrium pressure of ammonia increases.

S_{2}

: On increase in volume of container at constant temperature, equilibrium pressure of ammonia
increases.

S_{3}

: On increase in mass of N

H_{4}

HS(s) in the container at constant temperature, equilibrium pressure of
ammonia increases.

TTT
FFF
TTF
FFT

Pearl asked a question

Subject: Chemistry, asked on on 4/2/16

for the reaction: NH2COONH4 ---> 2NH3 + CO2/
the equilibrium constant kp= 2.9*10^ -5 atm^3. the total pressure of gases at equilibrium when 1.0 mole of reactant was heated will be

Sanya Sharma asked a question

Subject: Chemistry, asked on on 7/3/14

calculate the PH of a 0.1 M ammonia solution. Calculate the pH after 50 ml of this solution is treated with 25ml of 0.1 HCl. the dissociation constant of ammonia K_b = 1.77 x 10^-5.