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For a reversible process at equilibrium, the change in entropy may be expressed as:

For a real gas 'X'the Boyle point is 240^@C. If the van der Waals constant 'b'is 0.08 dm^3 mol^(-1), calculate the value of constant 'a'for 'X'.

For a real gas , the compressibility factor Z has different values at different temperatures and pressures . Which of the following is not correct under the given conditions ?

For a real gas, following equation (P+(a)/(TV_(m)^(2)))(V_(m)-beta)=RT, where alpha and beta are positive constants. Select the correct option(s):

For a reaction value of K_c is 7.105 xx 10^(-5), what will be the change in free energy ?

For a reaction whose standrad enthalpy change is -100 kJ, what final temperature is needed to double the equilibrium constant from its value at 298 K?

Which of the following reaction is spontaneous at room temperature

For a reaction the Delta S value is -20 J mol^(-1) k^(-1) . If the temperature is increased from 0^(@) C at 25^(@)C , the increases in the value of Delta Gis (in J mol^(-1))

For a reaction taking place in a container in equilibriumwith its surroundings, the effect of temperature on its equilibrium constant K in terms of entropy is described by

For a reaction, SO_(2) (g) + 1//2O_(2)(g) to SO_(3)(g) if K_(p)=1.7 xx10^(12) at 20^(@)C and 1 atm pressure , then value of K_(c) is

For a reaction R_(1), Delta G = x KJ mol^(-1). For a reaction R_(2), Delta G = y KJ mol^(-1). Reaction R_(1) is non-spontaneous but along with R_(2) it is spontaneous. This means that

For a reaction N_(2)(g)+3H_(2)(g)to2NH_(3)(g),DeltaH=-24 kcal at 700 K and 10 atm pressure, calculate magnitude of change in internal energy if 1.68 kg of N_(2)(g) and 0.3 kg of H_(2) are mixed and reaction undergoes 60% completion:

For a reaction Delta H= 3 KJ and Delta S = 10 J/Kelvin at what temperature the reaction will be spontaneous ?

For a reaction AX_(5)hArr AX_(2), 1% of AX_(5) is dissociated at a total pressure of 1 atm, the equilibrium constant K_(P) is approximately equal to

For a reaction at equilibriumH_(2)(g) + Cl_(2)(g) hArr 2HCl(g) K = 4, " the calue of " (K_(b)[HCl]^(2))/(K_(f)[H_(2)][Cl_(2)])is 1.

For a reaction at 25^(circ)C,DeltaG=12.7kJ when the reaction quotient Q=10.0. What is the value of DeltaG^(circ) for this reaction?

For a reaction aA + bB hArr cC + dD at equilibrium G^(theta) = 0 always .

For a reaction A (g)hArrB(g)at equilibrium, the partical pressure of B is found to be one fourth of the paritcal pressure of A. The value of DeltaG^(circ) of the reaction AhArrB is :

For a reaction , A (g) to A(l) , Delta H = -3RT . The correct statement for the reaction is

For a reaction A+BhArr2C the equilibrium concentration of (A) and (B) are 20 mole//Lwhen volume is doubled the new equilibrium concentration of (A) was found to be 15 mol//L then

For a reaction A + B rarr C + D, the entropy change is +68.4 JK^(-1) and the enthalpy change is -124.6 kJ. Calculate the Gibb's energy change at 298 K.

Fora reaction:2A(g) toB(g), DeltaH =-40 Kcal. Ifrate constantfor disapperance of A is 10^(-2) M^(-1) sec^(-1) then identify the opationswhich will be correct [Assumegases to behaveideallyand reactionto be occuring at 300 K][Take : R=2 cal/mole K]

For a reaction 2A(g) hArr B (g) Q_(c) gt K " if "'A' is added maintainingQ_(c) gt K,the reaction will move in backward direction.

For a reaction 2 Cl_((g))rarrCl_(2)What are the signs of DeltaH and DeltaS ?

For a process change in enthalpy is 36 kJ.mol and change in entropy is 120 J "mole "^(-1) K ^(-1). The temperature at which the sywstem attains eequibrium is

For a polyprotic acid, H_(3)PO_(4) its three dissociation constanst K_(1),K_(2) and K_(3) are in the order

For a physical equilibrium, H_(2) O (Ice) hArr H_(2) O (Water ) which of the following is the true statement:

For a perfectly cyrstalline solid C_(p,m)= a T^(3) + bT, where a and b are constants. If C_(p,m) is 0.40 J/K mol at 10K and 0.92 J/K mol at 20K, then molar entropy at 20K is 0.2x xx R joules. Then the value of x is

For a perfectly crystalline solid C_(p.m) = aT^(3), where a is constant. If C_(p.m) is 0.42 J/K - mol at 10K, molar entropy at 10K is

For a particular value of azimuthal quantum number (l), the total number of magnetic quantum number values (m) is given by

For a particular reversible reaction at temperature T, DeltaH and DeltaS were found to be both +ve. If T_(e) is the temperature at equilibrium, the reaction would be spontaneous when

For a particular reverisble reaction at temperature T,DeltaH and DeltaSwere found to be both =ve. If T_(e) is the temperature at equilibrium, the reaction would be spontaneous when

For a of orbital, the values of m are

For a non-electrolytic solution

For a molecule to be stable

For a mutielectron atom, the maximum of 2p-orbital in radial probability distribution graph is nearer the nucleus than that of 2s-orbital . Therefore, 2p-orbital should be closer to the nucleus and lower in energy than 2s-orbital. But 2s-orbital has lower energy than 2p-orbital. Explain.

For a molecule given select the correct statement (s). CH_(3)-CH=CH-CH=C=C=CH-CH=C=CH-CH_(3)

For a mixture of I mole He and 1 mole Ne, select the correct statements(s)

For a liquid the vapour pressure is given by log_(10) P = (-400)/(T) + 10 Vapour pressure of the liquid is 10^(x) mm Hg at 400K. The value of x will be _______

For a liquid, enthalpy of fusion is 1.435 xx 10^(3) cal mol^(-1) and molar entropy change is 5.26 cal mol^(-1). Calculate the melting point of the liquid.

For a liquid, enthalpy of fusion is 1.435 kCal mol^(-1) and molar entropy change is 5.26 cal mol^(-1) K^(-1). The freezing point of liquid in celcius will be ________

For a hypothetical reaction , X rarr Y , the enthalpy and entropy changes are 46.3 kJ mol^(-1) and 108.80 JK^(-1) mol^(-1) respectively. Find the temperature. Find the temperature above which this reaction is spontaneous

For a hypothetical reaction, the following kinetic data suggested that the overall order of this reaction is {:("[A]",[B],[C]),(mol" "dm^(-3),mol" "dm^(-3),mol" " dm^(-3) s^(-1)),(2.0,1.0,1.0),(2.0,4.0,2.0),(1.0,4.0,1.0):}

For a hypothetical hydrogen like atom, the potential energy of the system is given by U(r) = (-Ke^2)/(r^3) ,where r is the distance between the two particles, If Bohr.s model of quantization of angular momentum is applicable then velocity of particle is given by:

For a hydrogen -like particle, derive the expression : v_(n) = ((Ze^(2))/(mr_(n)))^(1//2) where v_(n) is the velocity of the electron at distance r_(n) from the nucleus, Z is the atomic number of the H-like particles, m and e are the charge and mass of the electron.

For a homogeneous gaseous reaction, 2A(g)+3B(g)hArr4C(g)+D(g),K_(eq)=(8)/(1.5)^(3) If in a 2 litre rigid container starting with 4 moles of A and 6 moles of B equilibrium was established then identify the options which is/are correct.

For a homodiatomic molecule with a total number of electrons 14, after filling sigma**2s M.O. the next electron goes to