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explain why cp is always greater than cv????
why oxygen is paramagnetic in nature by molecular orbital theory
what is physical equilibrium? Give two example
Equal volumes of two solutions pH=2 and pH=4 are mixed together.Calculate the pH of the resulting solution?
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.
What is meant by "weighing by transfer"?when is this used?answer with respect to basic laboratory techniques.
100 ml of 0.1 N NaOH is mixed with 100 ml of 0.1 N H2SO4.The pH of the resultant solution is??
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??
what is the formula and basicity of hydrated oxalic acid and anhydrous oxalic acid?
How CH3COONa is a strong electrolyte?
What is the pH of 10-8 M HCl solution?
At 90'C, pure water has [H30+]=10-6mole/liter. the value of kW at 90'C is:
what type of substance is used for preparing standard solution?
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.
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 pKa for CH3COOH =4.74 and log 2=0.301)
Ksp of Mg(OH)2 is 4.0×10-12.The number of moles of Mg2+ ions in one litre of its saturated solution in 0.1 M NaOH is??
why are standard solutions always prepared in volumetric flask?
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??
can solid NaOH be used to prepare its standard solution?
calculate simultaneous solubility of AgCNS and AgBr in a solution of water.Ksp AgCNS=1.2*10-12,Ksp AgBr=5*10-13
CH3COCH3 = CH3CH3 + CO initial pressure of CH3COCH3 is 100mm when equilibrium is established mole fraction of CO is 1/3 hence Kp is
( ans= 50 mm )
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%
H2(g)+I2(g)⇌ 2HI(g), Kp=0.35 at 298 K
If PH2=0.10 atm,PI2=0.10 atm andPHI=0.80 atm at 298 K,has equilibrium been reached.If not state on which side of the equilibrium the system is??
the value of delta G for the phosphorylation of glucose in glycolysis is 13.8 kj/mol. Find the value of Kc at 298K?
calculate the enthalpy change for the reaction :-
H2(g) + Cl2(g) → 2HCL(g)
given that the bond energies H-H,Cl-Cl,and H-Cl bonds are 433, 244 and 431kj/ mol respectively.
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.
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 Kp and the total pressure.
Is SnCl4 a Lewis acid or a base???
Arrange the following Bronsted Acids in increasing acidic strength,Give Reason for your choice :
The equilibrium constants KP1 and KP2 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
The pH of 0.10 M KCN solution at 25 degre sol , for HCN , Ka =6.2*10^-10
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
What is an evacuated vessel? [From Comprehensive Chemistry Pg.-370]
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??
What is the pH of 0.1M NaHCO3? K1 = 4.5 x 10-7 , K2 = 4.5 x 10-11 for carbonic Acids?
Ksp(BaSO4)= 1.5*10-9. find solubility in a)pure water b)0.1 M BaCl2 solution
reached, concentration of C was thrice the equilibrium concentration of B. Calculate KC.
1)- What is the pH of10-8 (N) HCl?
what is meant by "weighing by transfer"?when is this used?
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
The equillibrium , SO2Cl2(g) ---> SO2(g) + Cl2(g) is attained at 25.C in a closed container and an inert gas, helium is introduces. Which of the following statement(s) is / are correct ?
(A) Concentrations of SO2 , Cl2 & SO2Cl2 are changed.
(B) No effect on equillibrium.
(C) Concentration of SO2 is reduced.
(D) Kp of the reaction is increasing.
what is the conjugate base of CN-
plz explain me ostwald dilution law
calculate the pH of 1.0 X 10^ -8 M solution of HCL ?
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