52671 + Interview Questions in Chemistry in Class 11

1.	For the reaction 2NH_(3) hArrN_(2) + 3H_(2) equilibrium constant at 25^(@)C and 400^(@)C and 3.5 and 35 respcctively. This means that the forward reaction is:
Answer» EXOTHERMIC ENDOTHERMIC Exorgic Onpredic table Solution :as `T uarr`, K is INCREASING `IMPLIES` endothermic reaction

Discussion

2.	For the reaction 2KClO_(3) rarr 2KCl +3O_2which statments (s) is (are ) correct ?
Answer» It is disproportionation It is intramolecular redoxchange CL atoms are reduced OXYGEN atoms are OXIDIZED SOLUTION :

Discussion

3.	For the reaction: 2H_(2(g)) + O_(2(g)) rarr 2H_2O_((g)) , DeltaH = -571 kJ bond energy of (H-H) = 435 kJ, of (O = O) = 498kJ , then the average bond energy of O-H bond using the above data
Answer» `484kJ` `-84kJ ` `271kJ` `-271kJ` ANSWER :A

Discussion

4.	For the reaction 2H_(2(g)) + o_(2(g)) rarr 2H_(2)O_((g)), Delta H^(@) = - 573.2 kJ. The heat of decomposition of water per mol is:
Answer» 286.6kJ 573.2 KJ `-28.66` k Cal 68.56 kCal Solution :For DECOMPSITION `+573.2 rarr 2` mol ? `rarr` 1MOL `Delta = (573.2)/(2)` = 286.6kJ/mol = 68.56 Kcal/mol

Discussion

5.	For the reaction, 2Fe^(3+) + Sn^(2+)rarr2Fe^(2+) + Sn^(4+) the normality of SnCl, (mol. wt. = 189.7) solution prepared by dissolving 47.5g in acid solution and diluting with H_(2)Oto a total of 2.25 litre is
Answer» 0.222N 0.111 N 0.333 N 0.444 N Solution :`VN=W/Eimplies 2.25 XXN = ((475)/(189.7))/2 impliesN= 0.222` N

Discussion

6.	For the reaction, 2Co +O_(2)rarr 2CO_(2), DeltaH = - 560 kJ . Two moles of CO andone mole ofO_(2) are takenin a container of volume 1 L. They completely reacts to form two moles of CO_(2). The gases deviate appreciably from ideal behaviour. Ifthe pressure in the vessel changesfrom 70 to 40 atm,find the magnitude ( absolute value)of DeltaU at 500 K ( 1 L atm = 0.1 kJ ).
Answer» Solution :`H =U +PV` `DELTAH+ DeltaU + Delta(PV) ` or ` DeltaH = DeltaU + VDeltaP` or `DeltaU = DeltaH -VDeltaP = - 560kJ - 1L( 40 atm-70 atm)` `=- 560 KJ + 30 Latm = - 560 kJ + 3-0 XX 0.1kJ = - 557 kJ ` Absolute value `=557 kJ . `

Discussion

7.	For the reaction , 2Cl(g)rarrCl_(2)(g), what are thesigns ofDeltaHand DeltaS ?
Answer» Solution :The GIVEN reaction repesents the formation of BONDS. Hence, energy is released , ie.,`DELTAH` is `-ve`. Further, 2 moles of atomshave greater randomness than1 mole of molecules. Hence, randomness DECREASES, i.e.,`DeltaS` is `-ve`.

Discussion

8.	For the reaction 2Cl(g)rarrCl_(2)(g), the signs of DeltaHand DeltaS respectively are
Answer» `+,-` `+,+` `-,-` `-,+` Solution :Whenatoms combine to form molecule,energy is released,i.e., `DeltaH ` is `-ve`. As TWO moles combine to give ONE mol, randomness ( ENTROPY) DECREASES,i.e., `eltaS` is `-ve`.

Discussion

9.	For the reaction, 2Cl(g)rarr Cl_2(g) what are the signs of DeltaH and DeltaS?
Answer» SOLUTION :Since the reaction involves formation of bonds, enery is released. So `DELTAH` is NEGATIVE. Since chlorine atoms combine together to form `Cl_2` molecules, RANDOMNESS decreases. i.e. `DeltaS` is negaive.

Discussion

10.	For the reaction 2CI_((s) ) to CI_(2(s)) the value of Delta H and Delta S are respectively .......... .
Answer» `+,-` `+,+` `-,-` `-,+` ANSWER :C

Discussion

11.	For the reaction 2BrCl hArr Br_(2)(g) + Cl_(2)(g) K_(c)" is " 32 " at " 500 K. If initially pure BrCl is present at a concentration of 3.30 xx 10^(-3), M, what is its molar concentration in the mixture at equilibrium?
Answer» ANSWER :`3.0 XX 10^(-4) M`

Discussion

12.	For the reaction, 2CI_((g)) to CI_(2(g)) what are the signs of Delta H and Delta S ?
Answer» SOLUTION :`2CI_((G)) to CI_(2(g))`shows the reaction of formation of bond. So heat is released. `THEREFORE Delta H -ve` One mole `CI_(2)` molecule is formed from 2 mol of Cl ATOMS. So RANDOMNESS is decreased `therefore Delta S = -ve`

Discussion

13.	for the reaction 2A_((g)) hArr B_((g)) + 3C_((g)), at a given temperature, K_(c) = 16. What must be the volume of the falsk, If a mixture of 2 mole cach A, B and C exist in equilibrium ?
Answer» `(1)/(4)` `(1)/(2)` 1 2 Solution :`K_(C)=(n_(B)n_(C)^(2))/(n_(A)^(2)) xx (1)/(V^(2)) IMPLIES 16=(2 xx 2^(3))/(2^(2) xx V^(2)) implies V=(1)/(2)`

Discussion

14.	For the reaction 2A(g)+B(g)rarr2D(g), DeltaU^theta=-10.5 kJ and DeltaS^theta=-44.1Jk^-1 Calculate DeltaG^theta for the reaction and predict whether the reaction may occur spontaneously.
Answer» Solution :`Deltan` for the reaction=2-(2+1)=-1 `therefore DeltaH^theta=DeltaU^theta+DeltanRT=-10.5+(-1)xx8.314xx10^-3kJxx298=-12.98` DeltaG^theta=DeltaH^theta-TDeltaS=-12.98-298(-44.1xx10^-3kJk^-1)=+0.16kJ` Since `DeltaG^theta is POSITIVE, the reaction will not occur SPONTANEOUSLY at 298K.

Discussion

15.	For the reaction 2A_((g)) + B_((g)) to 2D_((g)) DeltaU^( Theta ) = -10.5 "kJ" and S^( Theta ) =-44.1 "JK"^(-1) Calculate Delta G^( Theta ) for the reaction, and predict whether the reaction may occur spontaneously.
Answer» Solution :`Deltan_((g)) = 2-3 = -1` `Delta H = Delta U + Deltan_((g)) "RT"` `= - 10.5 + (-1) (8.314 XX 10^(-3) ) (298)` `= -10.5 - 2.48 = - 12.98 "kJ"` `Delta G = Delta H- T Delta S` `= -12.98 - 298 (-44.1 xx 10^(-3) )` `= - 12.98 "kJ" + 13.14 "kJ" = 0.16 "kJ"` `Delta G` is positive, so the reaction may not occur SPONTANEOUSLY.

Discussion

16.	For the reaction, , 2A(g)+B(g) rarr 2D(g), DeltaU^(@) = - 10.5 kJ andDeltaS^(@) = - 44.10JK^(-1) Calculate DeltaG^(@) for the reaction and predictwhether the reaction mayoccur spontaneously.
Answer» Solution :For the GIVEN reaction,`Deltan_(G) =2- ( 3)= - 1` `:.DeltaH^(@) =DELTAU^(@) + Deltan_(g) RT =- 10.5 kJ + ( -1) ( 8.314 xx 10^(-3) kJ ) ( 298) = - 10.5-2.48= - 12.98 kJ` `DeltaG^(@) = DeltaH^(@)- T DeltaS=-12.98 kJ -298 ( -44.1xx 10^(-3) kJ)=-12.98 kJ+13.14 kJ =0.16 kJ ` As`DeltaG^(@) `COMES out to be `+ve`,the reaction will not occur spontaneously.

Discussion

17.	For the reaction, 2A(g)+B(g)to2D(g) DeltaU^(theta)=-10.5 kJ and DeltaS^(theta)=-44.1 JK^(-1) Calculate DeltaG^(theta) for the reaction, and predict whether the reaction can occur spontaneously or not.
Answer» SOLUTION :`DELTA G ^(@) = + 161.8 kJ MOL ^(-1) , `NON spontaneous

Discussion

18.	For the reaction 2A+BrarrC at 298 K, DeltaH=400kJ mol^-1 and DeltaS=0.2 kJk^-1mol^_1. At what temperature will be reaction become spontaneous considering DeltaH and DeltaS to be constant over the temperature range.
Answer» Solution :At equilibrium, `DeltaG`=0`therefore` DELTAH-TDELTAS`=0 or `DeltaH=TDeltaS` `therefore` T=`DeltaH/DeltaS=400/0.2=2000K` i.e the reaction will be at equilibrium at 2000K. Since `DeltaH`and `DeltaS` are positive`DeltaG` will be negative when `Tdeltas>DeltaH`. This takes PLACE at higher temperature. Therefore, the reaction will be sopntaneous at temperature above 2000K.

Discussion

19.	For the reaction 2 NO_(2) (g) hArr 2NO (g) + O_(2) (g) , K_(C) = 1.8 xx 10^(-6) at 185^(@) C . At the same temperature the value of K_(C) for the reaction . NO (g) + (1)/(2) O_(2) hArr NO_(2) (g) is ……………
Answer» `0.9 XX 10^(6)` `7.5 xx 10^(2)` `1.95 xx 10^(-3)` `1.95 xx 10^(3)` Solution :The reaction is REVERSED and halved. `K_(C) = (1)/(sqrt(1.8 xx 10^(-6)) = 7.5 xx 10^(2)`

Discussion

20.	For the reaction 298 K A_((g)) + B_((g)) to C_((g)) at 298K, Delta U = -5 "cal" and Delta S= -10 "cal" K^(-1). Delta G = …..... "cal".
Answer» `2612` `2379` `261.2` `-2612` ANSWER :B

Discussion

21.	For the reaction , 2 NO (g) + Cl_(2) (g) hArr 2 NOCl (g) " if partial pressure " p_(NOCl)= 032 " atm, " p_(No) = 022 " atm" and p_(Cl_(2))= 0*11 " atm, then find "K_(p).
Answer» Solution :`K_(p) = p_(NOCI)^(2)/ (p_(NO)^(2) xx p_(Cl_(2)))= (032 " atm")^(2)/(022 " atm"^(2)xx 011 "atm")=1923 " atm"^(-1)`

Discussion

22.	For the reaction 2 HI (g) hArr H_(2) (g) + I_(2) (g)at 720 K , the equilibrium constant value is 50 . The equilibrium constant for the reaction H_(2) (g) + I_(2) (g) hArr 2 HI (g) at the same temperature will be ………..
Answer» Solution :`0.02` Forward reaction EQUILIBRIUM constant `K_1= 50` Reverse reaction equilibrium constant `K_(2) = ?` `K_(2) = (1)/(K_(1)) = (1)/(50) = 0.02`

Discussion

23.	For the reaction 2 H_(2) + O_(2) rarr 2H_(2)O, DeltaH= - 571 . Bond energy of H-H =435 and O=O=498 . Then the average bond energy of O-H bond will be
Answer» 484 `-484` 271 `-271` Solution :For the reaction `2H_(2)+O_(2)RARR 2H_(2)O(2H_(2)O(2H-O-H)` `Delta_(r)H= 2xx BE(H_(2)) +BE(O_(2)) - 4 xx BE(O-H)-571= 2 xx 435 +498 -4 xxBE (O-H) ` or `BE(O-H) =484`

Discussion

24.	For the raction: PCI_5(g)hArrPCI_3(g)+CI_2(g) The forward reaction at constant temperature is favouraved by:
Answer» introduncing chlorine gas at constant VOLUME introducing an inert gas at constant PRESSURE INCREASING the volune of the CONATAINER introducing `PCI_5` at constant volume ANSWER :B::C::D

Discussion

25.	For the p_(z) orbital, conventionally m is
Answer» `-2` `+2` 0 Any of these Answer :C

Discussion

26.	For the properties mentioned, the correct trend for the different species is in
Answer» Strength as LEWIS acid`-BCl_(3)gtAlCl_(3)gtGaCl_(3)` Inert pair effect-`AlgtGagtIn` Oxidising property-`Al^(3+)gtIn^(3+)gtTi^(3+)` FIRST ionisation ENTHALPY-`BgtAlgtTI` Solution :(a) The tendency to behave as Lewisacid DECREASES with the increases in the size down the group. `BCl_(3)` easily accepts a lone pair of ELECTRONS from ammonia to form `BCl_(3)cdotNH_(3)`. Hence, strength as Lewis acid `BCL_(3)gtAlCl_(3)gtGaCl_(3)`

Discussion

27.	For the process X_((g)) + e^(-) rarr X_((g))^(-), Delta H =x and X_(g)^(-) rarr X_(g) + e^(-) , Delta H = y Select correct alternat :
Answer» IONISATION ENERGY of `X_((G))^- is Y` electron affinity of `X_((g)) is X` electron affinity of `X_((g)) is -Y` all the correct statements. Answer :D

Discussion

28.	For the process to occue under adiabatic conditions, the correct conditions is : (i) Delta T = 0 (ii) Delta p =0(iii) q=0(iv) w=0
Answer» SOLUTION :`DELTAP= 0`

Discussion

29.	For the process to occur under adiabatic conditions, the correct condition is :
Answer» <P>`DELTA T = 0` `Delta p = 0` `q=0` `w=0` ANSWER :C

Discussion

30.	Forthe process H_(2)O(l) rarr H_(2)O(g) at T=100 ^(@)C and 1 atmosphere pressure, the correct choice is
Answer» `DeltaS_("system") gt 0` and `DELTAS _("surroundings") gt 0` `DeltaS_("system") gt 0` and `DeltaS _("surroundings") lt 0` `DeltaS_("system") lt 0` and `DeltaS _("surroundings") gt 0` `DeltaS_("system") lt 0` and `DeltaS _("surroundings") lt 0` Solution :At `T= 100^(@)C` and 1 atmosphere presssure (i.e.,boilingpoint ) ,thereexists the EQUILIBRIM `H_(2)O(l) hArr H_( 2)O (g)`, For this conditions,`DeltaS_("total") = 0` Hence,`DeltaS_("system") + Delta_("surroundings") = 0` or`DeltaS_("system") = - DeltaS_("surroundings")` But as `H_(2)O(l)` changes into `H_(2)O(g)`, `DeltaS_("system") = + ve , i.e.,gt 0` `:. DeltaS_("surroundings")` willbe`lt 0`.

Discussion

31.	H_(2) O(l) hArr H_(2) O_((s)) , Delta H = - qapplication of pressure on this equilibrium
Answer» `G _((ICE )) = G _(("WATER")) = 0` `G _((ice) = G _(("water")) NE 0` `G _((ice)) GT G _(("water")) ` `G _("ice") lt G _(("water"))` ANSWER :A

Discussion

32.	For the process Dry ice rarr CO_(2(g))
Answer» `Delta H` is positive and `Delta S` is negative Both `Delta H and Delta S` are negative Both `Delta H and Delta S` are positive `Delta H` is negative and `Delta S` is positive Solution :GASES have more entropy than SOLIDS sublimation is ENDOTHERMIC

Discussion

33.	For the reaction 2H_(2)O_((l)) rarr H_(3)O_((aq))^(+) + OH_((aq))^(-), the value of Delta H is
Answer» `+348 KJ` `-348KJ` `-174KJ` `+87KJ` ANSWER :A

Discussion

34.	For the process, 3/2A to B, at 298 K , DeltaG^@ is kJ mol^(-1). The composition of the reaction mixture is [B] =1 and [A] = 10000. Predict the direction of the reaction and the relation between reaction quotient (Q) and the equilibrium constant (K).
Answer» FORWARD DIRECTION because QgtK Reverse direction because QgtK Forward direction because QltK Reverse direction becauseltK Answer :B

Discussion

35.	For the preparation of alkanes, aqueous solution of sodium or potassium salt of carboxylic acid is subjected to
Answer» HYDROGENATION oxidation ELECTROLYSIS hydrolysis Solution :`2CH_3COOK+2H_2Ooverset"Electrolysis"to ubrace(CH_3-CH_3+2CO_2)_"ANODE"+ubrace(2KOH+H_2)_"CATHODE"`

Discussion

36.	For the preparation of a litre of N//10 solution of H_(2)SO_(4), we need :
Answer» 9.8 g 4.9 g 10 g 98 g Solution :N//A

Discussion

37.	For the precipitation reaction of Ag ^(+) ions with NaCl, which of the following statements is correct ?
Answer» `Delta H` for the REACTION is zero `Delta G` for the reaction is zero `Delta G` for the reaction is negative `Delta G` is EQUAL to `Delta H` ANSWER :C

Discussion

38.	For the precipitation reaction of Ag^(+) ions with NaCl, which of the following statements is correct?
Answer» `DELTAH` for the reaction is ZERO `DELTAG` for the reaction is zero `DeltaG` for the reaction is NEGATIVE `DeltaG = DeltaH` ANSWER :C

Discussion

39.	For the physical equilibrium ice hArr water, the forward reaction is not favoured by
Answer» INCREASING pressure Increasing temperature Keeping in CONTACT with HOT water TAKING more ICE Solution :Taking more ice

Discussion

40.	For the nomenclature of alkene, give the ruler of giving the names of structure ?
Answer» Solution :(i) For alkene nomenclature, select the carbon atom chain having double bond. (ii) Double bonded carbon having less numbers of carbon or double carbon should gets less number. Give the chain side where double bond must GET less number. (iii) Seeing the total number of alkene, (ANE) and (ENE) suffix are used after the main carbon. (iv) If there are more than 1 double bond then according to double bond diene. triene, tetraene prefix are used. (v) For the SUBSTITUTED carbon, see the RULES which you have studied earlier.

Discussion

41.	For the n=2 energy level, how many orbitals of all kinds are possible
Answer» 2 3 4 5 Solution :For the n=2, ENERGY LEVEL ORBITALS of all KINDS are possible `n^2 , 2^2 =4`

Discussion

42.	For the isothermal reversible expansion of an ideal gas fromvolume V_(1) to volume V_(2), the work done is given by w_(rev)="…................." whereas for the irreversible expansion , it is given by w_("irrev") = "….........".
Answer» <P> Solution :`w_("rev") = -2.303 n RT log. (V_(2))/( V_(1)), w_("irrev") =-P( V_(2) -V_(1)) = - P DELTAV`

Discussion

43.	For the ideal gas , the work of reversible expansion under isothermal conditions can be calculated byusing the expressionw=-nRT"In"(v_(f))/(v_(I)) A samplecontaining 1.0 mol ofan ideal gasis expanded isothermally and reversiblyto ten times of its original is carried put at 300 K and at 600 Krespectvely . Choose the correct option .
Answer» Workdone at 600 K is20 timesthe work done at 300 K. Workdone at 300 K istwicethework done at 600 K. Workdone at 600 K istwicethework done at 300 K. `DeltaU=0 ` in both cases. Answer :c,d

Discussion

44.	For the hypothetical reactions, the equilibrium constant (K) values are given : A hArr B , K_(1) = 20 B hArr C , K_(2) = 40 C hArr D , K_(3) = 3*0 The equilibrium constant (K) for the reaction A hArr D is
Answer» 48 6 12 24 Answer :A::B::C::D

Discussion

45.	For the hypothetical reactions, the equilibrium constant (K) values are given A harr B, K_1=2.0 B harr C, K_2=4.0 C harr D, K_3=3.0 The equilibrium constant for the reaction A harr D is
Answer» 48 6 24 12 Solution :`K_(C)=K_(1) XX K_(2) xx K_(3)`

Discussion

46.	For the hypothetical reaction A_(2(g)) + B_(2(g)) hArr 2AB_((g)) Delta_(r ) G^(@) and Delta_(r)S^(@) are 20 kJ/mol and -20 JK^(-1) mol^(-1) respectively at 200K. If Delta_(r)C_(P) is 20 JK^(-1) mol^(-1) then Delta_(r ) H^(@) at 400K is
Answer» 20kJ/mol 7.98kJ/mol 28kJ/mol none of these Solution :`Delta H_(200K)^(0) = Delta G^(0) + T Delta S^(0)` `= 20 + ((-20) xx 200)/(1000) = 16` kJ/mol `Delta H_(400K)^(0) = (20 xx 200)/(1000) + 16 = 20`

Discussion

47.	For the hypothetical reaction : A+B hArrC+D, the equilibrium constant,K, is less than 1.0 at 25^(circ)C and decreased by 35% on changing the temperature to 45^(circ)C. What must be ture according to this information?
Answer» The `DeltaH^circ` for the REACTION is NEGATIVE . The `DeltaS^circ` for the reaction is POSITIVE. The `DeltaG^circ`for the reaction at `25^cricC` is negative. The `DeltaG^circ` for the reaction at `45^circC` is ZERO. ANSWER :A

Discussion

48.	For the hypothetical reaction A +B hArr C+2D equilibrium constant at 400 K is 1.8 xx 10^(-6) mol L^(-1)
Answer» `9.5 xx 10^(-5) mol L^(-1)` `9.5 xx 10^(-4) mol L^(-1)` `4.75 xx10^(-4) mol L^(-1)` None of these Solution :`{:(,A,+,B,hArr,C,+,2D),("Initial CONC." (mol L^(-1)),-,,-,,1.0,,1.0),("At EQUILIBRIUM" (mol L^(-1)),((1-0-x)/(2)),,((1.0-x)/(2)),,((1.0+x)/(2)),,x):}` D used up `=(1.0 -x )` mol `L^(-1)` C used up `=((1.0-x)/(2)) mol L^(-1)` C at equilibrium `(1.0-(1.0-x)/(2))mol L^(-1)` `=((1.0+x)/(2)) mol L^(-1)` A ( or B ) produced at equilibrium `=C` used up `=((1.0-x)/(2))mol L^(-1)` A very small value of K indicates that at equilibrium CONCENTRATIONS of C and D are very small i.e., x is very small. As such at equilibrium `[C]=((1.0+x)/(2))=0.5 mol L^(-1)` `[D]=x mol L^(-1) , [A]=[B]` `=((1.0-x)/(2)) mol L^(-1)` `=0.50 mol L^(-1)` `:. K=([C][D]^(2))/([A][B])` `1.8 xx 10^(-6)=(0.50xx x^(2))/(0.50 xx 0.80)` `x^(2)=9.0 xx 10^(-9)` `implies x=9.5 xx10^(-4) mol L^(-1)` `:. [D]=x=9.5 xx 10^(-4) mol L^(-1)`

Discussion

49.	For the homogeneous are reaction at 600 K, 4NH_(3(g))+5O_(2(g))hArr4NO_((g))+6H_(2)O_((g)). The equilibrium K_(c) has the unit.
Answer» `("mol dm"^(-3))^(-1)` `("mol dm"^(-3))^(1)` `("mol dm"^(-3))^(10)` `("mol dm"^(-3))^(-9)` SOLUTION :`4NH_(3(g))+5O_(2(g))hArr4NO_((g))+6H_(2)O_((g))` `Deltan_(g)=10-9=1` `"Unit of "K_(c)=("mol dm"^(-3))^(Deltan_(g))` `:."Unit"=("mol dm"^(-3))^(1)`

Discussion

50.	For the half cell reaction, 2BrO_(3)^(-) + 12H^(+)+10e to Br_(26H_(2)O the equivalent mass of sodium bromate is :
Answer» EQUAL to its MOL. MASS `1//3` of its mol. Mass `1//6` of its mol. Mass `1//5` of its mol. Mass Solution :N//A

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

For the reaction 2NH_(3) hArrN_(2) + 3H_(2) equilibrium constant at 25^(@)C and 400^(@)C and 3.5 and 35 respcctively. This means that the forward reaction is:

For the reaction 2KClO_(3) rarr 2KCl +3O_2which statments (s) is (are ) correct ?

For the reaction: 2H_(2(g)) + O_(2(g)) rarr 2H_2O_((g)) , DeltaH = -571 kJ bond energy of (H-H) = 435 kJ, of (O = O) = 498kJ , then the average bond energy of O-H bond using the above data

For the reaction 2H_(2(g)) + o_(2(g)) rarr 2H_(2)O_((g)), Delta H^(@) = - 573.2 kJ. The heat of decomposition of water per mol is:

For the reaction, 2Fe^(3+) + Sn^(2+)rarr2Fe^(2+) + Sn^(4+) the normality of SnCl, (mol. wt. = 189.7) solution prepared by dissolving 47.5g in acid solution and diluting with H_(2)Oto a total of 2.25 litre is

For the reaction , 2Cl(g)rarrCl_(2)(g), what are thesigns ofDeltaHand DeltaS ?

For the reaction 2Cl(g)rarrCl_(2)(g), the signs of DeltaHand DeltaS respectively are

For the reaction, 2Cl(g)rarr Cl_2(g) what are the signs of DeltaH and DeltaS?

For the reaction 2CI_((s) ) to CI_(2(s)) the value of Delta H and Delta S are respectively .......... .

For the reaction 2BrCl hArr Br_(2)(g) + Cl_(2)(g) K_(c)" is " 32 " at " 500 K. If initially pure BrCl is present at a concentration of 3.30 xx 10^(-3), M, what is its molar concentration in the mixture at equilibrium?

For the reaction, 2CI_((g)) to CI_(2(g)) what are the signs of Delta H and Delta S ?

for the reaction 2A_((g)) hArr B_((g)) + 3C_((g)), at a given temperature, K_(c) = 16. What must be the volume of the falsk, If a mixture of 2 mole cach A, B and C exist in equilibrium ?

For the reaction 2A(g)+B(g)rarr2D(g), DeltaU^theta=-10.5 kJ and DeltaS^theta=-44.1Jk^-1 Calculate DeltaG^theta for the reaction and predict whether the reaction may occur spontaneously.

For the reaction 2A_((g)) + B_((g)) to 2D_((g)) DeltaU^( Theta ) = -10.5 "kJ" and S^( Theta ) =-44.1 "JK"^(-1) Calculate Delta G^( Theta ) for the reaction, and predict whether the reaction may occur spontaneously.

For the reaction, , 2A(g)+B(g) rarr 2D(g), DeltaU^(@) = - 10.5 kJ andDeltaS^(@) = - 44.10JK^(-1) Calculate DeltaG^(@) for the reaction and predictwhether the reaction mayoccur spontaneously.

For the reaction, 2A(g)+B(g)to2D(g) DeltaU^(theta)=-10.5 kJ and DeltaS^(theta)=-44.1 JK^(-1) Calculate DeltaG^(theta) for the reaction, and predict whether the reaction can occur spontaneously or not.

For the reaction 2A+BrarrC at 298 K, DeltaH=400kJ mol^-1 and DeltaS=0.2 kJk^-1mol^_1. At what temperature will be reaction become spontaneous considering DeltaH and DeltaS to be constant over the temperature range.

For the reaction 2 NO_(2) (g) hArr 2NO (g) + O_(2) (g) , K_(C) = 1.8 xx 10^(-6) at 185^(@) C . At the same temperature the value of K_(C) for the reaction . NO (g) + (1)/(2) O_(2) hArr NO_(2) (g) is ……………

For the reaction 298 K A_((g)) + B_((g)) to C_((g)) at 298K, Delta U = -5 "cal" and Delta S= -10 "cal" K^(-1). Delta G = …..... "cal".

For the reaction , 2 NO (g) + Cl_(2) (g) hArr 2 NOCl (g) " if partial pressure " p_(NOCl)= 0*32 " atm, " p_(No) = 0*22 " atm" and p_(Cl_(2))= 0*11 " atm, then find "K_(p).

For the reaction 2 HI (g) hArr H_(2) (g) + I_(2) (g)at 720 K , the equilibrium constant value is 50 . The equilibrium constant for the reaction H_(2) (g) + I_(2) (g) hArr 2 HI (g) at the same temperature will be ………..

For the reaction 2 H_(2) + O_(2) rarr 2H_(2)O, DeltaH= - 571 . Bond energy of H-H =435 and O=O=498 . Then the average bond energy of O-H bond will be

For the raction: PCI_5(g)hArrPCI_3(g)+CI_2(g) The forward reaction at constant temperature is favouraved by:

For the p_(z) orbital, conventionally m is

For the properties mentioned, the correct trend for the different species is in

For the process X_((g)) + e^(-) rarr X_((g))^(-), Delta H =x and X_(g)^(-) rarr X_(g) + e^(-) , Delta H = y Select correct alternat :

For the process to occue under adiabatic conditions, the correct conditions is : (i) Delta T = 0 (ii) Delta p =0(iii) q=0(iv) w=0

For the process to occur under adiabatic conditions, the correct condition is :

Forthe process H_(2)O(l) rarr H_(2)O(g) at T=100 ^(@)C and 1 atmosphere pressure, the correct choice is

H_(2) O(l) hArr H_(2) O_((s)) , Delta H = - qapplication of pressure on this equilibrium

For the process Dry ice rarr CO_(2(g))

For the reaction 2H_(2)O_((l)) rarr H_(3)O_((aq))^(+) + OH_((aq))^(-), the value of Delta H is

For the process, 3/2A to B, at 298 K , DeltaG^@ is kJ mol^(-1). The composition of the reaction mixture is [B] =1 and [A] = 10000. Predict the direction of the reaction and the relation between reaction quotient (Q) and the equilibrium constant (K).

For the preparation of alkanes, aqueous solution of sodium or potassium salt of carboxylic acid is subjected to

For the preparation of a litre of N//10 solution of H_(2)SO_(4), we need :

For the precipitation reaction of Ag ^(+) ions with NaCl, which of the following statements is correct ?

For the precipitation reaction of Ag^(+) ions with NaCl, which of the following statements is correct?

For the physical equilibrium ice hArr water, the forward reaction is not favoured by

For the nomenclature of alkene, give the ruler of giving the names of structure ?

For the n=2 energy level, how many orbitals of all kinds are possible

For the isothermal reversible expansion of an ideal gas fromvolume V_(1) to volume V_(2), the work done is given by w_(rev)="…................." whereas for the irreversible expansion , it is given by w_("irrev") = "….........".

For the hypothetical reactions, the equilibrium constant (K) values are given : A hArr B , K_(1) = 2*0 B hArr C , K_(2) = 4*0 C hArr D , K_(3) = 3*0 The equilibrium constant (K) for the reaction A hArr D is

For the hypothetical reactions, the equilibrium constant (K) values are given A harr B, K_1=2.0 B harr C, K_2=4.0 C harr D, K_3=3.0 The equilibrium constant for the reaction A harr D is

For the hypothetical reaction A_(2(g)) + B_(2(g)) hArr 2AB_((g)) Delta_(r ) G^(@) and Delta_(r)S^(@) are 20 kJ/mol and -20 JK^(-1) mol^(-1) respectively at 200K. If Delta_(r)C_(P) is 20 JK^(-1) mol^(-1) then Delta_(r ) H^(@) at 400K is

For the hypothetical reaction : A+B hArrC+D, the equilibrium constant,K, is less than 1.0 at 25^(circ)C and decreased by 35% on changing the temperature to 45^(circ)C. What must be ture according to this information?

For the hypothetical reaction A +B hArr C+2D equilibrium constant at 400 K is 1.8 xx 10^(-6) mol L^(-1)

For the homogeneous are reaction at 600 K, 4NH_(3(g))+5O_(2(g))hArr4NO_((g))+6H_(2)O_((g)). The equilibrium K_(c) has the unit.

For the half cell reaction, 2BrO_(3)^(-) + 12H^(+)+10e to Br_(26H_(2)O the equivalent mass of sodium bromate is :

For the reaction , 2 NO (g) + Cl_(2) (g) hArr 2 NOCl (g) " if partial pressure " p_(NOCl)= 032 " atm, " p_(No) = 022 " atm" and p_(Cl_(2))= 0*11 " atm, then find "K_(p).

For the hypothetical reactions, the equilibrium constant (K) values are given : A hArr B , K_(1) = 20 B hArr C , K_(2) = 40 C hArr D , K_(3) = 3*0 The equilibrium constant (K) for the reaction A hArr D is