Which of the following statement is correct?
1) Absolute entropy of substance can not be calculated
2) Heat can flow from cold body to hot body on its own
3) Enthalpy is path function
4) `Delta G_(sys)=-T Delta S``

Which of the following statements is/are correct about the followig reaction? Fe_(3)O_(4)overset(Delta)toFe_(2)O_(3) .

Which of the following statement (s) is correct? Statement-I: The entropy of isolated system with P-V work only, is always maximized at equillibrium. Statement-2: It is possible for the entropy of closed system to decrease substantialy in an irreversible process. Statemet-3: Entropy can be crearted but not destroyed. Statement-4 DeltaS_(system) is zero for reversible process in an isolated system.

Which of the following statements is//are correct" The following reaction occurs: 2Al + 3MnO overset(Delta)rarr Al_(2) O_(3) + 3 Mn . 108.0 g of Al and 213.0 g of MnO was heated to initiate the reaction. (Mw "of" MnO = 71 , atomic weight of Al = 13)

Which of the following statements are true (T) and which are false (F): Sum of the three angles of a triangle is 180^0 A triangle can have two right angles. All the angles of a triangle can be less than 60^0 All the angles of a triangle can be greater than 60^0 All the angles of a triangle can be equal to 60^0 A triangle can have two obtuse angles. A triangle can have at most one obtuse angles. In one angle of a triangle is obtuse, then it cannot be a right angled triangle. An exterior angle of a triangle is less than either of its interior opposite angles. An exterior angle of a triangle is equal to the sum of the two interior opposite angles. An exterior angle of a triangle is greater than the opposite interior angles

Which of the following statements are incorrect ? (1) Co^(+3) with strong field ligand forms high magnetic moment complex. (2) For Co^(+3) if pairing "energy"(P) gt Delta_o then the complex formed will have (t_(2g)^(4),(e_g)^2) configuration. (3) For [Co(en)^3]^( 3+) lambda_("absorbed") is less than lambda_("absorbed") for [CoF_6]^( 3–) (4) If Delta_o = 18000 cm^(–1) for Co^(+3) then with same ligands for it Delta_t = 16000 cm^(–1)

Consider the following satements : S_(1): Generally square planare complexes show geometrical isomerism but do not exhibit optical isomerism because thy do not possess plane of symmetry . S_(2): Delta_(t)=(4)/(9)Delta_(0) S_(3) : In octahedral complexes each electron entering teh t_(2g) orbitals stabilizes the complex ion by 0.4 Delta_(0) and each electron entering teh e_(g) orbital destabilizes the complex by an amount of 0.6 Delta_(0) Select the correct statement from the codes given below.

How many of the given statement are correct : I : Molar entropy of a substance follows the order (S_(m))_("Solid")lt (S_(m))_("liquid")lt(S_(m))_("gas") II : Entroy change of system for the reaction H_(2)(g) rarr 2H(g) is +ve . III. Molar entropy of a non - crystalline solid will be zero at absolute zero. IV : If the path of an irreversible process is reversed, then both system and surrounding shall be restored to their original states. V: Refractive index and molarity are intensive properties.

Consider the following statements and arrange in the order of true/false as given in the codes. S_(1) : Change in state function between two states is a definite quantity and does not depend on path. S_(2) : Intensive properties can't be algebraically added or subtracted. S_(3) : Ration of two extensive properties always result into a parameter that depends on amount of substance. S_(4) : Molar heat capacity is a path function. The correct order of True//false of the above statement is :

Entropy is a measure of randomess of system. When a liquid is converted to the vapour state entropy of the system increases. Entropy in the phase transformation is calculated using Delta S = (Delta H)/(T) but in reversible adiabatic process Delta S will be zero. The rise in temperature in isobaric or isochoric process increases the randomness of system, which is given by Delta S = "2.303 n C log"((T_(2))/(T_(1))) C = C_(P) or C_(V) Entropy change in a reversible adiabatic process is

Entropy is a measure of randomess of system. When a liquid is converted to the vapour state entropy of the system increases. Entropy in the phase transformation is calculated using Delta S = (Delta H)/(T) but in reversible adiabatic process Delta S will be zero. The rise in temperature in isobaric or isochoric process increases the randomness of system, which is given by Delta S = "2.303 n C log"((T_(2))/(T_(1))) C = C_(P) or C_(V) The temperature at whicgh liquid H_(2)O will be in equrilibrium with its vapour is ( Delta H and Delta S for vapourisation are 50 kJ mol^(-1) and 0.15 kJ mol^(-1)K^(-1) )