Description : Consider the following reactions at `1000^(@)C`. (A) `Zn_((s))+1/2 O_(2(g)) rarr ZnO_((s)), DeltaG^(@)=-360` kJ/mol (B) `C_("(gra)")+1/2 O_(2(g)) rarr
Last Answer : Consider the following reactions at `1000^(@)C`. (A) `Zn_((s))+1/2 O_(2(g)) rarr ZnO_((s)), DeltaG^( ... a) and (b) are true D. both (a) and (b) false
Description : In which of the following reactions,standard reaction entropy change`(DeltaS^(@))`is positive and standard Gibb,s energy change`(DeltaG^(@))`decreases
Last Answer : In which of the following reactions,standard reaction entropy change`(DeltaS^(@))`is positive and standard Gibb,s ... (2)O_(2)(g)rarr CO_(2)(g)`
Description : (A) The reduction reaction, `Cr_(2)O_(3)+2Al to Al_(2)O_(3)+2Cr, DeltaG^(0)=-421KJ` is not possible at room temperature (R ) Certain amount of activat
Last Answer : (A) The reduction reaction, `Cr_(2)O_(3)+2Al to Al_(2)O_(3)+2Cr, DeltaG^(0)=-421KJ` is not ... incorrect D. If (A) is incorrect but (R ) is correct
Description : `DeltaG^(@) vsT` plot in the Ellingham diagram slopes down for the reaction.
Last Answer : `DeltaG^(@) vsT` plot in the Ellingham diagram slopes down for the reaction. A. `Mg+(1)/(2)O_(2)toMgO` B. ` ... (2)toCO` D. `CO+(1)/(2)O_(2)toCO_(2)`
Description : Correct statements from the graph I) Above 1073 K,`DeltaG^(0)` for the formation of `F_(2)O_(3)` is less negative than `DeltaG^(0)` for the formation
Last Answer : Correct statements from the graph I) Above 1073 K,`DeltaG^(0)` for the formation of `F_(2)O_(3)` is less ... I B. I,II only C. I,II,III only D. All
Description : Assertion : Reduction of ZnO with carbon is done at `1100^(@)C`. Reason : At this temperature, `DeltaG^(@)` is negative and the process is spontaneous
Last Answer : Assertion : Reduction of ZnO with carbon is done at `1100^(@)C`. Reason : At this temperature, ... ^(@)` is negative and the process is spontaneous.
Description : For the formation of metal oxide, `deltaG^(@)` __________ with increase in temperature.
Last Answer : For the formation of metal oxide, `deltaG^(@)` __________ with increase in temperature. A. Only I B. I,II only C. I,II,III only D. All
Description : (A): At 1200K iron can be reduce cuprous oxide (R )L: At 1200K, `Fe+Cu_(2)O to FeO+2Cu` `DeltaG=-300kj//"mole"`
Last Answer : (A): At 1200K iron can be reduce cuprous oxide (R )L: At 1200K, `Fe+Cu_(2)O to FeO+2Cu` ` ... incorrect D. If (A) is incorrect but (R ) is correct
Description : The formation of the oxide `M_(x)O_(y)`per mole of `O_(2)` cinsumed is written a `(2x)/(y)M_((S))+O_(2(g))to(2)/(y)M_(x)O_(y)` the free energy change
Last Answer : The formation of the oxide `M_(x)O_(y)`per mole of `O_(2)` cinsumed is written ... from the following two reactions. Choose the correct statement
Description : `Delta_(f)^(@)` for `CO_(2(g)), CO_((g))` and `H_(2)O_((g))` are `-393.5,-110.5` and `-241.8kJ mol^(-1)` respectively. The standard enthalpy change `(
Last Answer : `Delta_(f)^(@)` for `CO_(2(g)), CO_((g))` and `H_(2)O_((g))` are `-393.5,-110.5` and `-241.8kJ mol^(-1 ... A. `524.1` B. `41.2` C. `-262.5` D. `-41.2`
Description : For the equilibrium: `LiCl.3NH_(3(s))hArrLiCl.NH_(3(s))+2NH_(3)`, `K_(p)=9 atm^(2)` at `40^(@)C`. A `5 litre` vessel contains `0.1` mole of `LiCl.NH_(
Last Answer : For the equilibrium: `LiCl.3NH_(3(s))hArrLiCl.NH_(3(s))+2NH_(3)`, `K_(p)=9 atm^(2)` at `40^( ... backward reaction for completion? A. 5 B. 9 C. 3 D. 1
Description : What volume of oxygen gas `(O_(2))` measured at `0^(@)C` and 1 atm, is needed to burn completely 1L of propane gas `(C_(3)H_(8))` measured under the s
Last Answer : What volume of oxygen gas `(O_(2))` measured at `0^(@)C` and 1 atm, is needed to burn completely 1L of propane gas ... ? A. 5 L B. 10 L C. 7 L D. 6 L
Description : One mole of acidified `K_(2)Cr_(2)O_(7)` on reaction with excess of KCl will liberate….., moles of `I_(2)`.
Last Answer : One mole of acidified `K_(2)Cr_(2)O_(7)` on reaction with excess of KCl will liberate….., moles of `I_(2)`. A. 6 B. 1 C. 7 D. 3
Description : A molar solution is one that contains one mole of a solute in [IIT 1986] (A) 1000 g of the solvent (B) One litre of the solvent (C) One litre of the solution (D) 22.4 litres of the solution
Last Answer : (C) One litre of the solution
Description : A piston filled with `0.04` mole of an ideal gas expands reversible from `50.0mL` at a constant temperature of `37.0^(@)C` . As it does so, it absorbs
Last Answer : A piston filled with `0.04` mole of an ideal gas expands reversible from `50.0mL` at a constant temperature of `37. ... J` D. `q= +208 J, w=+208 J`
Description : If `0.5 `mole `H_(2)` is reacted with 0.5 mole `I_(2)` in a ten `-` litre container at `444^(@)C` and at same temperature value of equilibrium constan
Last Answer : If `0.5 `mole `H_(2)` is reacted with 0.5 mole `I_(2)` in a ten `-` litre container at `444^(@)C` and at ... B. `(1)/(7)` C. `sqrt((1)/(7))` D. 49
Description : Calculate the entropy of `Br_(2)(g)` in the reaction `H_(2)(g)+Br_(2)(g)rarr2HBr(g), Delta S^(@)=20.1 JK^(-1)` given, entropy of `H_(2)` and HBr is 13
Last Answer : Calculate the entropy of `Br_(2)(g)` in the reaction `H_(2)(g)+Br_(2)(g)rarr2HBr(g), Delta S^(@)=20.1 JK^(-1 ... ` C. `24.63 JK^(-1)` D. `20 KJK^(-1)`
Description : For a reaction `2X(s)+2Y(s)rarr 2Cl(l)+D(g)` The `q_(p)` at `27^(@)C` is -28 K Cal. `mol^(-1)`. The `q_(V)` is ___________ K. Cal. `mol^(-1)` :-
Last Answer : For a reaction `2X(s)+2Y(s)rarr 2Cl(l)+D(g)` The `q_(p)` at `27^(@)C` is -28 K Cal. `mol^(-1)`. The `q_( ... . `-27.4` B. `+27.4` C. `-28.6` D. `28.6`
Description : Assertion (A): There is no reaction known for which `DeltaG` is positive, yet it is spontaneous. Reason (R ) : For photochemical reaction, `DeltaG` is
Last Answer : Assertion (A): There is no reaction known for which `DeltaG` is positive, yet it is spontaneous. ... False. D. If both Assertion & Reason are false.
Description : For which one of the following reaction, the graph of `DeltaG` against T is almost horizontal to temperature axis
Last Answer : For which one of the following reaction, the graph of `DeltaG` against T is almost horizontal to temperature axis A. ... ((s))+O_(2(g)) to 2MgO(g)`
Description : For the given reaction , `A(g) rarr 2B(g) , Delta_(r)H= 30 kJ//"mole" Delta_(r)S = 150 J//mol` at `300 K` If `C_(P,A) = 20 J//K mol` and `C_(P,B) = 20
Last Answer : For the given reaction , `A(g) rarr 2B(g) , Delta_(r)H= 30 kJ//"mole" Delta_(r)S = 150 J//mol` at ... G` is negative D. At `T = 200, Delta G` is zero
Description : If `Delta G^(@)gt 0` for a reaction then :
Last Answer : If `Delta G^(@)gt 0` for a reaction then : A. `K_(P) gt 1` B. `K_(P) lt 1` C. The products predominate in the equilibrium mixture D. None
Description : For a reaction `H_(2(g))+I_(2(g))rArr2HI_((g))at 721^(@)C` the value of equilibrium constant is 50 . If 0.5 moles each of `H_(2)` & `I(2)` is added to
Last Answer : For a reaction `H_(2(g))+I_(2(g))rArr2HI_((g))at 721^(@)C` the value of equilibrium constant is 50 . ... constant will be . A. 100 B. 25 C. 50 D. 200
Description : (A) Reduction of `Cr_(2)O)(3)` with the Aluminium is possible ( R ) `DeltaG_((f))^(0) of Cr_(3)O_(3) " is -540kj//mole and" DeltaG_((f))^(0) ` `of Al_
Last Answer : (A) Reduction of `Cr_(2)O)(3)` with the Aluminium is possible ( R ) `DeltaG_((f))^(0) of Cr_ ... incorrect D. If (A) is incorrect but (R ) is correct
Description : Calculate the enthalpy of vaporisation per mole for ethanol. Given `DeltaS = 109.8 J K^(-1) mol^(-1)` and boiling point of ethanol is `78.5^(@)`.
Last Answer : Calculate the enthalpy of vaporisation per mole for ethanol. Given `DeltaS = 109.8 J K^(-1) mol^(-1)` ... KJ mol^(-1)` D. Some more data is required
Description : The workdone in ergs for the reversible expansion of one mole of an ideal gas from a volume of 10 litres to 20 litres at `25^(@)C` is
Last Answer : The workdone in ergs for the reversible expansion of one mole of an ideal gas from a volume of 10 ... 0821xx298xx` log 0.5 D. `-2.303xx2xx298` log2
Description : If, `H_(2)(g)+Cl_(2)(g)rarr 2HCl(g) , Delta H^(@)=-44` Kcal `2Na(s)+2HCl(g)rarr 2NaCl(s)+H_(2)(g), Delta H=-152` Kcal Then, `Na(s)+0.5Cl_(2)(g)rarr Na
Last Answer : If, `H_(2)(g)+Cl_(2)(g)rarr 2HCl(g) , Delta H^(@)=-44` Kcal `2Na(s)+2HCl(g)rarr 2NaCl(s)+H_(2)( ... ` A. 108 Kcal B. 196 Kcal C. `-98` Kcal D. 54 Kcal
Description : Consider the following sequence of reaction: `HO-overset(O)overset(||)(C)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-C-=N overset(200^(@)
Last Answer : Consider the following sequence of reaction: `HO-overset(O)overset(||)(C)-underset(CH_(3))underset(|)overset(CH_ ... )underset(|)(C)-CH_(2)-NH_(2)` D.
Description : In the reaction `N_(2(g))+O_(2(g))rArr2NO_((g))`at equilibrium the concentrations of `N_(2),O_(2)andNO` are 0.25 , 0.05 and 1 M respectively . Calcula
Last Answer : In the reaction `N_(2(g))+O_(2(g))rArr2NO_((g))`at equilibrium the concentrations of `N_(2),O_(2)andNO` are 0.25 ... .75 M , 0.55 M D. 0.75 M , 0.45 M
Description : An aqueous solution containing `1 M NiSO_(4) & 1 M S_(2) O_(8)^(2-)` is electrolysed using palladium electrode, at `25^(@)C` `{:(Ni^(+2)+2e^(-) rarrNi
Last Answer : An aqueous solution containing `1 M NiSO_(4) & 1 M S_(2) O_(8)^(2-)` is electrolysed using palladium electrode, ... is `2H^(+) + 2e^(-) rarr H_(2)`
Description : At `25^(@)` C for complete combustion of 5 mol propane `(C_(3)H_(8))` . The required volume of `O_(2)` at STP will be .
Last Answer : At `25^(@)` C for complete combustion of 5 mol propane `(C_(3)H_(8))` . The required volume of `O_(2)` at ... . A. 560 L B. 560 mL C. 360 L D. 360 mL
Description : What is the standard enthalpy change at 298 K for the following reaction? `CO_(2) (g)+ C("diamond") rarr 2CO(g)` Given : `DeltaH_(f)^(@)(CO,g) = - 110
Last Answer : What is the standard enthalpy change at 298 K for the following reaction? `CO_(2) (g)+ C("diamond") rarr 2CO(g ... `+172.5 kJ//mol` D. `170.5 kJ//mol`
Description : For a gaseous reaction, `A(g)+3B(g)to3C(g)+3D(g),DeltaU` is 17 kcal at `27^(@)C`. Assuming `R=2cal" "K^(-1)mol^(-1)`, the value of `DeltaH` for the ab
Last Answer : For a gaseous reaction, `A(g)+3B(g)to3C(g)+3D(g),DeltaU` is 17 kcal at `27^(@)C`. Assuming `R=2cal" " ... Kcal B. 18.2 Kcal C. 20.0 Kcal D. 16.4 Kcal
Description : Heat of reaction for, `CO(g)+1//2O_(2)(g)rarr CO_(2)(g)` at constant V is -67.71 K cal at `17^(@)C` . The heat of reaction at constant P at `17^(@)C`
Last Answer : Heat of reaction for, `CO(g)+1//2O_(2)(g)rarr CO_(2)(g)` at constant V is -67.71 K cal at `17^(@)C` . ... B. `+68.0` K cal C. `-67.4` K cal D. None
Description : The value of enthalpy change `(DeltaH)` for the reaction `C_(2)H_(5)OH (l)+3O_(2) (g) rarr 2CO_(2) (g) +3H_(2)O (l)` at `27^(@)C` is `-1366.5 kJ mol^(
Last Answer : The value of enthalpy change `(DeltaH)` for the reaction `C_(2)H_(5)OH (l)+3O_(2) (g) rarr 2CO_(2) (g) + ... 1369. kJ` C. `-1364.0 kJ` D. `-1361.5 kJ`
Description : 0.01 mole of iodoform `(CHI_(3))` reacts with Ag to produce a gas whose volume at NTP is `2CHI_(3)+6Ag to6Agl(s)+C_(2)H_(2)(g)`
Last Answer : 0.01 mole of iodoform `(CHI_(3))` reacts with Ag to produce a gas whose volume at NTP is `2CHI_(3)+6Ag ... mL B. 112 mL C. 336 mL D. None of these
Description : FeO (s) + CO (g) = Fe (s) + CO2 (g), k = 0. 435 at 1173E; at equilibrium, what will be the number of moles of CO gas required to reduce one mole of FeO at 1173 K? (A) 1.0 (B) 1.3 (C) 2.3 (D) 3.3
Last Answer : Option D
Description : 5 moles of `SO_(2)` and 5 moles of `O_(2)` react in a closed vessel. At equilibrium 60% of the `SO_(2)` is consumed . The total number of gaseous mole
Last Answer : 5 moles of `SO_(2)` and 5 moles of `O_(2)` react in a closed vessel. At equilibrium 60% of the `SO_(2)` is consumed ... - A. 5.1 B. 3.9 C. 10.5 D. 8.5
Description : If `10g` of `V_(2)O_(5)` is dissolved in acid and is reduced to `V^(2+)` by zinc metal, how many mole `I_(2)` could be reduced by the resulting soluti
Last Answer : If `10g` of `V_(2)O_(5)` is dissolved in acid and is reduced to `V^(2+)` by zinc metal, how many mole `I_(2 ... 127`) A. 0.11 B. 0.22 C. 0.055 D. 0.44
Description : In the reaction M g C I 2 plus 2 KO H - and gt MG OH 2 plus 2 K CI if 1 mole Mg CI 2 is added to 3 moles KO H what is the limiting reagent?
Last Answer : Feel Free to Answer
Description : If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) ⇌ C3H8(g) will be __________ Kcal. (A) -19.4 (B) -30.2 (C) 55.2 (D) -55.2
Last Answer : (A) -19.4
Description : Using the following thermochemical data. `C(S)+O_(2)(g)rarr CO_(2)(g), Delta H=94.0` Kcal `H_(2)(g)+1//2O_(2)(g)rarr H_(2)O(l), Delta H=-68.0` Kcal `C
Last Answer : Using the following thermochemical data. `C(S)+O_(2)(g)rarr CO_(2)(g), Delta H=94.0` Kcal `H_(2)(g)+1// ... .0` Kcal C. `-114.0` Kcal D. `+114.0` Kcal
Description : `C(s)+O_(2)(g)rarr CO_(2)(g)+94.0` K cal. `CO(g)+(1)/(2)O_(2)(g)rarr CO_(2)(g), Delta H=-67.7` K cal. From the above reactions find how much heat (Kca
Last Answer : `C(s)+O_(2)(g)rarr CO_(2)(g)+94.0` K cal. `CO(g)+(1)/(2)O_(2)(g)rarr CO_(2)(g), Delta H=-67.7` K cal. ... g)` A. `20.6` B. `26.3` C. `44.2` D. `161.6`
Description : Consider the following reaction : `xMnO_(4)^(-)+yC_(2)O_(4)^(2-)+zH^(+) to xMn^(2+)+2yCO_(2)+(z)/(2)H_(2)O` The value of x, y and z in the reaction ar
Last Answer : Consider the following reaction : `xMnO_(4)^(-)+yC_(2)O_(4)^(2-)+zH^(+) to xMn^(2+)+2yCO_(2)+(z)/(2)H_(2) ... 2, 5 and 8 C. 2, 5 and 16 D. 5, 2 and 8
Description : For `CaCO_(3)(s)rarr CaO(s)+CO_(2)(g)` at `977^(@)C, Delta H = 174` KJ/mol , then `Delta E` is :-
Last Answer : For `CaCO_(3)(s)rarr CaO(s)+CO_(2)(g)` at `977^(@)C, Delta H = 174` KJ/mol , then `Delta E` is :- A. 160 KJ B. 163.6 KJ C. 186.4 KJ D. 180 KJ
Description : In conversion of lime-stone to lime, `CaCO_(3(s)) to CaO_((s)) + CO_(2(g))` the values of `DeltaH^@` and `DeltaS^@` are `+179.1 kJmol^(-1)` and `160.2
Last Answer : In conversion of lime-stone to lime, `CaCO_(3(s)) to CaO_((s)) + CO_(2(g))` the values of `DeltaH^@` and ... : A. 1008 K B. 1200 K C. 845 K D. 1118 K
Description : At the point of intersection for any two reactions for any two reactions in Ellingham diagram, the gibbs energy `(DeltaG)` changes becomes
Last Answer : At the point of intersection for any two reactions for any two reactions in Ellingham diagram, the gibbs energy `(DeltaG ... `gt1` B. 1 C. `lt0` D. 0
Description : For the reaction `CO(g)+(1)/(2)O_(2)(g)rarr CO_(2)(g)` Which one of the statement is correct at constant T and P ?
Last Answer : For the reaction `CO(g)+(1)/(2)O_(2)(g)rarr CO_(2)(g)` Which one of the statement is ... ` D. `Delta H` is independent of physical state of reactants
Last Answer : For the reaction `CO(g)+(1)/(2)O_(2)(g)rarr CO_(2)(g)` Which one of the statement is correct at ... ` C. `Delta H lt Delta E` D. None of the above