94420 + Interview Questions in Chemistry in Class 12

1.	In the reaction : C_(3)H - underset(CH_(3))underset(\|)(CH)-CH_(2) - O - CH_(2)- CH_(3) + CI overset("heat")(to)
Answer» `CH_(3) - OVERSET(CH_(3))overset(\|)(CH) - CH_(2) - OH + CH_(3)- CH_(3)` `CH_(3) - underset(CH_(3))underset(\|)(CH)-CH_(3)-CH_(3) + CH_(3)CH_(2) - OH` `CH_(3) - overset(CH_(3))overset(\|)(CH) - CH_(2) - OH + CH_(3) - CH_(2) - I` `CH_(3) - underset(CH_(3))underset(\|)(CH) - CH_(2) - I + CH_(3)CH_(2) - OH` Answer :C

Discussion

2.	In the reaction C_(3)H_(7)CONH_(2)overset(P_(2)O_(5))rarr Xoverset(Pt.H_(2))rarrY. Y is :
Answer» <P>`C_(3)H_(7)CN` `C_(3)H_(7)CH_(2)NH_(2)` `C_(3)H_(7)OH` `C_(3)H_(7)NH_(2)`. Solution :`C_(3)H_(7)CONH_(2) OVERSET(P_(2)O_(5))rarr C_(3)H_(7)CN overset(Pt, H_(2))rarr C_(3)H_(7)CH_(2)NH_(2)`

Discussion

3.	In the reaction C_2H_5OH+HX overset(Zncl_2) (rarr) C_2H_5X+H_2O. The order of reactivity of HX is
Answer» HL GT HBR gt HCl HCl gt HBr gt Hl HCl gt Hl gtHBr HBr gt Hl gt HCl Answer :A

Discussion

4.	In the reaction, C_(2)H_(5)OC_(2)H_(5)+COoverset(BF_(3))underset(150^(@)C,"500atm pressure")to X What is X?
Answer» ETHYL propionate Ethyl CARBONATE DIETHYL PEROXIDE Ethylpropanoate ANSWER :D

Discussion

5.	In the reaction C_(2)H_(5)CH=CH_(2)+HX toproduct. Wha is the product ?
Answer» `C_(2)H_(5)CH_(3)` `C_(2)H_(5)CH_(2)-CH_(2)X` `C_(2)H_(5)-CHX-CH_(3)` `CH_(3)-CH_(2)X-CH=CH_(2)` Solution :We know that, `CH_(2)CH_(2)+HBr to c_(2) H_(5)Br+H_(2)O` THUS, ehtyl bromide `(C_(2)H_(5)Br)` is obtained by the action of hydrogen bromide (HBr) on ethanene.

Discussion

6.	In the reaction C_2H_5CH=CH_2+H-X to Product. What is the product
Answer» `C_2H_5-CH_3` `C_2H_5CH_2 -CH_2X` `C_2H_5-CHX-CH_3` `CH_3-CH_2X-CH=CH_2` ANSWER :C

Discussion

7.	In the reaction C_(2)H_(5)-X+KCN overset (alc) to A overset(dil. HCl) to B The product B is
Answer» `C__(2)H_(5)-CH_(2)NH_(2)` `C_(2)H_(5)-Cl` `C_(2)H_(5)COOH` `C_(2)H_(5)CHO` Answer :C

Discussion

8.	In the reaction C_(2) H_(5) NH_(2) overset( HCl + NaNO_(2)) to Aoverset( HCl) to Boverset( KCN ) toCThefinalproduct C is
Answer» PROPANE nitrile ETHANE nitrile propyl AMINE formo nitrile ANSWER :A

Discussion

9.	In the reaction C+2SrarrCS_(2)+DeltaH, DeltaH is the
Answer» HEAT of combustion Heat of neutralization Heat of solution None of these Solution :`CS_(2)` is formed from its initial COMPONENTS carbon and sulphur so, `DeltaH` is heat of formation of `CS_(2)`.

Discussion

10.	In the reaction, "BrO"_(3)^(-)(aq)+5"Br"^(-)(aq)+6" H"^(+)to3" Br"_(2)(l)+3" H"_(2)O(l), the rate of appearance of bromine ("Br"_(2)) is related to the rate of disappearance of bromide ions as follows :
Answer» `(d[Br_(2)])/(DT)=-(5)/(3)(d[BR^(-)])/(dt)` `(d[Br_(2)])/(dt)=(5)/(3)(d[Br^(-)])/(dt)` `(d[Br_(2)])/(dt)=(3)/(5)(d[Br^(-)])/(dt)` `(d[Br_(2)])/(dt)=-(3)/(5)(d[Br^(-)])/(dt)` SOLUTION :(d) : `(1)/(3)(d[Br_(2)])/(dt)=-(1)/(5)(d[Br^(-)])/(dt)" or "(d[Br_(2)])/(dt)=-(3)/(5)(d[Br^(-)])/(dt)`

Discussion

11.	In the reaction BrO_(3).^(-)(aq)+5Br^(-)(aq)+6H^(+) to 3Br_(2)(l)+3H_(2)O(l) The rate of appearance of bromine (Br_(2)) is related to rate of disappearance of bromide ions as following
Answer» `(d(Br_(2)))/(dt)=(3)/(5)(d(Br^(-)))/(dt)` `(d(Br_(2)))/(dt)=-(3)/(5)(d(Br^(-)))/(dt)` `(d(Br_(2)))/(dt)=-(5)/(3)(d(Br^(-)))/(dt)` `(d(Br_(2)))/(dt)=(5)/(3)(d(Br^(-)))/(dt)` ANSWER :B

Discussion

12.	In the reaction BrO_(3)^(-)(aq)+ 5Br^(-)+6H^(+) rarr 3Br_(2)+3H_(2)O the rate of appearance of bromine is related to the rate of disappearance of bromide ions as :
Answer» `(d[Br_(2)])/(dt)=-(5)/(3)(d[BR^(-)])/(dt)` `(d[Br_(2)])/(dt)=(5)/(3)(d[Br^(-)])/(dt)` `(d[Br_(2)])/(dt)=(3)/(5)(d[Br^(-)])/(dt)` `(d[Br_(2)])/(dt)=-(3)/(5)(d[Br^(-)])/(dt)` SOLUTION :(D) `-(1)/(5) (d[Br])/(dt) =(1)/(3) (d[Br_(2)]]/(dt)` ` (d[Br_(2)])/(dt) =-(3)/(5) (d[Br^(-)]]/(dt)`

Discussion

13.	In the reaction BrO^(-3)(aq) + 5Br^(-) (aq) + 6H^(+) rarr 3Br_(2)(1) + 3H_(2)O(1) The rate of appearance of bromine (Br_(2)) is related to rate of disapperance of bromide ions as folllwoing :
Answer» `(d Br_(2))/(DT) = - (3)/(5) (d (BR^(-)))/(dt)` `(d(Br_(2)))/(dt) = - (5)/(3) (d (Br^(-)))/(dt)` `(d (Br_(2)))/(dt) = (5)/(3) (d (Br^(-)))/(dt)` `(d(Br_(2)))/(dt)= (3)/(5) (d (Br^(-)))/(dt)` Solution :`(1)/(3) (d[Br_(2)])(dt) = - (1)/(5) (d[Br^(-)])/(dt) implies (d[Br_(2)])/(dt) = - (3)/(5) (d[Br^(-)])/(dt)`.

Discussion

14.	In the reaction , BrCH_(2)CH_(2)CH_(2)Brunderset(2.H_(3)O^(+))overset(1.alc . KCN)toXthe product X is :
Answer» Glutaric acid 1,3 - Propanedioic acid Succinic acid Malonic acid. Solution :`BrCH_(2)CH_(2)CH_(2)Broverset(ALC,KCN)toCNCH_(2)CH_(2)CH_(2)CH_(2)CNoverset(H_(3)O^(+))toHOOCunderset("Glutaric acid")(CH_(2)CH_(2)CH_(2)COOH)`

Discussion

15.	In the reaction, B(OH)_(3) + 2H_(2)O to [B(OH)_(4)]^(-) + H_(3)O^(+) ,B(OH)_(3) functions as
Answer» PROTONIC acid Lewis base Bronsted acid Lewis acid. Solution :(d): `B(OH)_(3)` functions as a Lewis acid as itaccepts a PAIR of ELECTRONS from `OH^(-)` of water by RELEASING a PROTON.

Discussion

16.	In the reaction between sodium and chlorine to form NaCl which of the following is reduced:
Answer» NA `Na^+` CL `Cl^-` ANSWER :C

Discussion

17.	In the reaction between acidifiedK_2Cr_2O_7 and iron (II) ions shown by the equation : Cr_2O_7^(2-)(aq)+6Fe^(2+)(aq) + 14H^+(aq) rarr2Cr^(3+)(aq)+7H_2O(l)+6Fe^(3+)(aq)
Answer» The COLOUR of the solution changes from green to yellow The IRON (II) IONS are reduced The DICHROMATE ions are reduced Hydrogen ions are reduced Answer :C

Discussion

18.	In the reaction between acidified K_(2)Cr_(2)O_(7) and Iron (II) ions shown by the equation Cr_(2)O_(7)^(2-)(aq.)+6Fe^(2+)(aq.)+14H^(+)(aq.) rarr 2Cr^(3+)(aq.)+7H_(2)(l)+6Fe^(3+)(aq.)
Answer» The DICHROMATE IONS are reduced The colour of the solution changes from GREEN to yellow Hydrogen ions are reduced The ion (II) ions are reduced. Answer :A

Discussion

19.	In the reaction AtoB, the value of the rate constant was found to be 1.0xx10^(-2)mol^(-1)"L "s^(-1). What is the order of the reaction ? How will the catalyst affect the value of the rate constant ?
Answer» Answer :2ND order, CATALYST increases the value of the rate constant

Discussion

20.	In the reaction BCl_(3) + PH_(3) rarr Cl_(3)B rarr PH_(3), Lewis base is
Answer» `BCl_(3)` `PH_(3)` `Cl_(3)B RARR PH_(3)` None of these Solution :`PH_(3)` DONATES electron PAIR to `BCl_(3)`.

Discussion

21.	In the reaction B (OH)_(2).2H_(2)Oto[B(OH)_(2)]^(-)+2H_(2)O^(+).[B(OH)_(2)]^(-)is
Answer» LEWIS base Protonic ACID Lewis acid Bronsted acid Solution :Boric acid is weak MONO basic acid.It is not a protonic acid but acts as a Lewis acid by ACCEPTING electron from a hydroxyl ion.

Discussion

22.	In the reaction, As_(2)S_(5)+xHNO_(3)rarr5H_(2)SO_(4)+yNO_(2)+2H_(3)AsO_(4)+12H_(2)O the values of x and y are:
Answer» 40,40 10,10 30,30 20,20 Solution :In RHS, there are 40 HYDROGEN ATOMS, HENCE only opton (s) will be SUITABLE.

Discussion

23.	In the reaction , As_2S_3+HNO_3➡ H_3AsO_4 +H_2SO_4 +NO,the element oxidised is/are:
Answer» As only S only N only As and S both Answer :D

Discussion

24.	In the reaction Ar-OH+RX overset("alkali")to A, A is
Answer» An aldehyde An ARYL chloride An ETHER ketone Solution :

Discussion

25.	In the reaction , AlCl_(3) + Cl^(-) = AlCl_(4)^(-) , AlCl_(3) can be classified as
Answer» ACID BASE SALT NONE of these Answer :A

Discussion

26.	In the reaction Alcl_3 + Cl rarr [Alcl_4]^- , AlCl_3 acts as :
Answer» Salt Lewis base Lewis acid Bronstad acid Answer :C

Discussion

27.	In the reaction, AgCl + KI hArrKCI + Aglwhen KI is added, the equilibrium is shifted towards right giving more Agl precipitate, because
Answer» both AgCl and AgI are sparingly soluble the `K_(sp)` of Agl is lower than `K_(sp)` of AgCl the `K_(sp )` of AgI is higher than `K_(sp)` of AgCI both AgCl and Agl have same solubility product. Solution :On adding KI,Agl precipitatedthis MEANS that Aglis lesssolublethanAgClor `K_(sp )` ofAglis LESSTHAN ` K_(sp ) `of AgCl `AgCl +KIhArrKCI+Agl`

Discussion

28.	In the reaction A_((g))+2B_((g))hArrC_((g))+QkJ, greater product will be obtained or the forward reaction is foroured by
Answer» At high TEMPERATURE and high PRESSURE At high temperatue and LOW pressure At low temperature and high pressure At low temperature and low pressure Solution :Both `Deltan and DeltaH` are NEGATIVE. HENCE, high pressure and low temperature will forward reaction.

Discussion

29.	In the reaction AB_((g))hArrA_((g))+B_((g))at 30^(@)C, K_(p) for the dissociation equlibrium is 2.56xx10^(-2) atm. If the total pressure at equlibrium is I atm, then the precentage dissociation of AB
Answer» `87%` `13%` `43.5%` `6%` Solution :`AB_((g)) to A_((g))+B_((g))` APPLYING law of mass ACTION `K_(p)=(alpha^(2)P)/(a-alpha^(2))` `(alpha^(2))/(1-alpha)=2.56xx10^(-2)""[therefore(1-alpha)=1]` `impliesalpha^(2)=2.56xx10^(-2)` `impliesalpha=sqrt(2.56xx10^(-2))impliesalpha=0.16` `%` age dissociation `=16%`

Discussion

30.	In the reaction, A_(2(g))+4B_(2(g))hArr2AB_(4(g)) DeltaHlt0 the formation of AB_(4) is will be favoured at
Answer» LOW temperature, HIGH pressure High temperature, low pressure Low temperature, low pressure High temperature, high pressure Solution :ACCORDING to Le-Chatelier principle EXOTHERMIC reaction is forward by low temperature, in forwared direction NUMBER of moles is less, hence pressure is high.

Discussion

31.	In the reaction, "Acetamide" overset(P_2O_5) to X overset(4H) to Ythe end product is :
Answer» Methylamine Methyl CYANIDE ETHYLAMINE Ethane. Answer :C

Discussion

32.	In the reaction A_2(g) +4B_2(g) hArr 2AB_3(g) , DeltaH lt 0 .The decomposition of AB_4 (g) will be favoured at
Answer» LOW TEMPERATURE and HIGH pressure high temperature and low pressure low temperature and low pressure high temperature and high pressure Answer :C

Discussion

33.	In the reaction Ato2B the concentration of a falls from 1.0M to 0.98 2M in one minute what is the rate of in moles "litre"^(-1)"sec^(-1)
Answer» `1.8xx10^(-3)` `3.0xx10^(-5)` `3.6xx10^(-3)` `6.0xx10^(-5)` ANSWER :B

Discussion

34.	In the reaction : A overset(HBr)rarr B underset("alcohol")overset(KOH)rarr C underset(Zn, H_(2)O)overset(O_(3))rarr HCHO + CH_(3) CHO the compound A is :
Answer» Ethylene ACETIC acid PROPENE Ethyl ALCOHOL Solution :`underset((A))(CH_(3)CH = CH_(2)) overset(HBr)rarr CH_(3)underset(Br)underset(\|)(CH) - CH_(3) overset(alc.KOH)rarr CH_(3)CH = CH_(2) underset(Zn, H_(2)O)overset(O_(3))rarr CH_(3)CHO + CO_(2)`

Discussion

35.	In the reaction, A+BhArr2C. at equilibrium, the concenration of A and B is 0.20 molI^(-1) each and that of c was found to be 0.6molI^(-1). tTe equiibrium constant of the reaction is
Answer» `2.4` 18 `4.8` 9 Solution :`A+Boverset(K_(2))hArr2C` `K_(C)=([C]^(2))/([A][B])=([0.6]^(2))/([0.2][0.2])=9`

Discussion

36.	In the reaction, A+B_(2) rarr AB_(2), identify the limiting reagent, if any, in the following mixtures {:("(i) 300 atoms of A"+"200 molecules of B","(ii) 2 mole A"+"3 mol B"),("(iii) 100 atoms of A"+"100 molecules of B","(iv) 5 mol A"+"2.5 mol B"):}
Answer» Solution :(i) According to the given reaction, 1 atom of Areacts with 1 molecule of B. `therefore` 200 molecules of B will react with 200 atoms of A and 100 atoms of A will be left unreacted. Hence, B is the limiting REAGENT while A is the excess reagent. (II) According to the given reaction, 1 mole of A react with 1 mole of B `therefore` 2 MOLES of A will react with 2 moles of B. Hence, A is the limiting REACTANT. (iii) No limiting reagent. (iv) 2.5 moles of B will react with 2.5 moles of A. Hence, B is the limiting reagent. (iv) 2.5 moles of A will react with 2.5 moles of A. Hence, B is the limiting reagent. (v) 2.5 moles of A will react with 2.5 moles of B. Hence, A is the limiting reagent.

Discussion

37.	In the elementary reactionA + Bto AB, if theconcentrationA andB isdoubled, the rateof reactionwill
Answer» Bedoubled Behalved INCREASE bu 6times Incrase by 4 SOLUTION :Rate `=[A][B]` ,Ifconcentrationof A and Bisdoubled,the ratewillincrease by ` 2xx2=4`times

Discussion

38.	In the reaction, A+B hArr 2C, at equilibrium, the concentration of A and B is 0.20 mol litre^-1 each and that of C was found to be 0.60 mol litre^-1. The equilibrium constant of the reaction ?
Answer» 9 4.8 18 2.4 Answer :A

Discussion

39.	In the reaction A+3BrArr2C, initially 10 mole each ofA and B were taken . If equilibrium pressure is 8 atm andalpha " of "A=20%then K_(p) will be:-
Answer» `(1)/(4)` `(1)/(8)` `(1)/(16)` `(1)/(2)` Answer :2

Discussion

40.	In the reaction a+3B rarr 2C, the rate of formation of C is
Answer» the same as RATE of CONSUMPTION of A the same as the rate of consumption of B twice the rate of consumption of A 3/2 TIMES the rate of consumption of B Answer :A::C

Discussion

41.	In the reaction, A+ 2B rarr 3C+D which of the following expression does not describe changes in the. concentration of various species as a function of. time:
Answer» `(d[C])/DT=(-3d[A])/dt` `(3d[D])/dt=(d[C])/dt` `(3d[B])/dt=(-2d[C])/dt` `(2d[B])/dt=(d[A])/dt` ANSWER :D

Discussion

42.	In the reaction A+2B hArr 2C, if 2 moles of A, 3.0 moles of B and 2.0 moles of C are placed in a 2.0 I flask and the equilibrium ocncentration of C is 0.5 mole /I. The equlibrium constant (K_(c)) for the reaction is
Answer» `0.073` `0.147` `0.05` `0.026` Solution :`A+2BhArr2C` `{:("Initial conc.",2,3,2),("at eqm.",2.5,4,1),("MOLAR",(2.5)/(2)=1.25,(4)/(2)=2,(1)/(2)=0.5):}` `K=([0.5]^(2))/([1.25]xx[2]^(2))=0.05`

Discussion

43.	The missing nucleide in the nuclear reaction : ""_(93)^(239)Npto.......+_(-1)^(0)e is
Answer» Bi Pu U Cm Answer :B

Discussion

44.	In the reaction : ""_(93)^(239)Npto""_(94)^(239)Pu+? The missing particle is :
Answer» neutron proton positron electron. Answer :D

Discussion

45.	In the reaction : ""_(84)^(215)Poto""_(82)^(211)Pb+""_(2)^(4)He If Pb belongs to group 14, Po belongs to group
Answer» 15 13 16 14 Answer :C

Discussion

46.	In the reaction, 4NH_(3)(3(g)) + 5O_(2)(g) to 4NO_(g) + 6H_(2)O_(l) when 1 mol of ammonia and 1 mol of O_(2)are made to react to completion then
Answer» 1.0 mol of `H_(2)O` will be produced 1.0 mol of NO will be produced all the ammonia will be consumed all the oxygen will be consumed. Solution :According to stoichiometry, they should REACT as follows: `underset(4 mol)(0.8 mol)(4 NH_(3(G)) + underset(1 mol)underset(5 mol)(5O_(2(g))) to underset(0.8 mol)(4 mol)(4NO_(g)) + underset(1.2 mol)(6 mol)(6H_(2)O_(l))` In this reaction, 1 MOLE of `O_(2)` and 0.8 mole of `NH_(3)` are consumed thereby indicating complete consumption of `O_(2)`.

Discussion

47.	In the reaction, 4NH_(3)(g)+5O_(2)(g)rarr4NO(g)+6H_(2)O(l), when 1 mole of ammonia and 1 mole of O_(2) are made to react to completion
Answer» 1.0 mole of `H_(2)O` is produced 1.0 mole of NO will be produced all the OXYGEN will be consumed all the ammonia will be consumed Solution :`O_(2)` will be limiting REACTANT. Hence, all oxygen will be consumed.

Discussion

48.	In the reaction 4NaCl+MnO_(2)+4H_(2)SO_(4)toMnCl_(2)+4NaHSO_(4)+2H_(2)O+'X'Then the correct statement regarding 'X' are I) It is a greenish yellow coloured gas . II) It can also be prepared by Deacons process III) It can be liquefied into greenish yellow liquid which boils at 239K
Answer» Only I & III Only I & II Only II & III All Answer :D

Discussion

49.	In thereaction, 4P + 3KOH + 3H_2O rarr3KH_2PO_2+PH_3
Answer» <P>P is oxidised only P is REDUCED only P is oxidised as WELL as reduced None of these Answer :C

Discussion

50.	In the reaction 4Fe+3O_(2)rarr4Fe^(3+)+6O^(2-) Which of the following statements is incorrect?
Answer» ACETIC acid methanoic acid HYDROCHLORIC acid CITRIC acid Solution :Hydrochloric acid secreted by OXYNTIC cell activat es proenzyme pepsinogen to pepesin and also provided the acidic pH OPTIMAL for pepsins

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In the reaction : C_(3)H - underset(CH_(3))underset(|)(CH)-CH_(2) - O - CH_(2)- CH_(3) + CI overset("heat")(to)

In the reaction C_(3)H_(7)CONH_(2)overset(P_(2)O_(5))rarr Xoverset(Pt.H_(2))rarrY. Y is :

In the reaction C_2H_5OH+HX overset(Zncl_2) (rarr) C_2H_5X+H_2O. The order of reactivity of HX is

In the reaction, C_(2)H_(5)OC_(2)H_(5)+COoverset(BF_(3))underset(150^(@)C,"500atm pressure")to X What is X?

In the reaction C_(2)H_(5)CH=CH_(2)+HX toproduct. Wha is the product ?

In the reaction C_2H_5CH=CH_2+H-X to Product. What is the product

In the reaction C_(2)H_(5)-X+KCN overset (alc) to A overset(dil. HCl) to B The product B is

In the reaction C_(2) H_(5) NH_(2) overset( HCl + NaNO_(2)) to Aoverset( HCl) to Boverset( KCN ) toCThefinalproduct C is

In the reaction C+2SrarrCS_(2)+DeltaH, DeltaH is the

In the reaction, "BrO"_(3)^(-)(aq)+5"Br"^(-)(aq)+6" H"^(+)to3" Br"_(2)(l)+3" H"_(2)O(l), the rate of appearance of bromine ("Br"_(2)) is related to the rate of disappearance of bromide ions as follows :

In the reaction BrO_(3).^(-)(aq)+5Br^(-)(aq)+6H^(+) to 3Br_(2)(l)+3H_(2)O(l) The rate of appearance of bromine (Br_(2)) is related to rate of disappearance of bromide ions as following

In the reaction BrO_(3)^(-)(aq)+ 5Br^(-)+6H^(+) rarr 3Br_(2)+3H_(2)O the rate of appearance of bromine is related to the rate of disappearance of bromide ions as :

In the reaction BrO^(-3)(aq) + 5Br^(-) (aq) + 6H^(+) rarr 3Br_(2)(1) + 3H_(2)O(1) The rate of appearance of bromine (Br_(2)) is related to rate of disapperance of bromide ions as folllwoing :

In the reaction , BrCH_(2)CH_(2)CH_(2)Brunderset(2.H_(3)O^(+))overset(1.alc . KCN)toXthe product X is :

In the reaction, B(OH)_(3) + 2H_(2)O to [B(OH)_(4)]^(-) + H_(3)O^(+) ,B(OH)_(3) functions as

In the reaction between sodium and chlorine to form NaCl which of the following is reduced:

In the reaction between acidifiedK_2Cr_2O_7 and iron (II) ions shown by the equation : Cr_2O_7^(2-)(aq)+6Fe^(2+)(aq) + 14H^+(aq) rarr2Cr^(3+)(aq)+7H_2O(l)+6Fe^(3+)(aq)

In the reaction between acidified K_(2)Cr_(2)O_(7) and Iron (II) ions shown by the equation Cr_(2)O_(7)^(2-)(aq.)+6Fe^(2+)(aq.)+14H^(+)(aq.) rarr 2Cr^(3+)(aq.)+7H_(2)(l)+6Fe^(3+)(aq.)

In the reaction AtoB, the value of the rate constant was found to be 1.0xx10^(-2)mol^(-1)"L "s^(-1). What is the order of the reaction ? How will the catalyst affect the value of the rate constant ?

In the reaction BCl_(3) + PH_(3) rarr Cl_(3)B rarr PH_(3), Lewis base is

In the reaction B (OH)_(2).2H_(2)Oto[B(OH)_(2)]^(-)+2H_(2)O^(+).[B(OH)_(2)]^(-)is

In the reaction, As_(2)S_(5)+xHNO_(3)rarr5H_(2)SO_(4)+yNO_(2)+2H_(3)AsO_(4)+12H_(2)O the values of x and y are:

In the reaction , As_2S_3+HNO_3➡ H_3AsO_4 +H_2SO_4 +NO,the element oxidised is/are:

In the reaction Ar-OH+RX overset("alkali")to A, A is

In the reaction , AlCl_(3) + Cl^(-) = AlCl_(4)^(-) , AlCl_(3) can be classified as

In the reaction Alcl_3 + Cl rarr [Alcl_4]^- , AlCl_3 acts as :

In the reaction, AgCl + KI hArrKCI + Aglwhen KI is added, the equilibrium is shifted towards right giving more Agl precipitate, because

In the reaction A_((g))+2B_((g))hArrC_((g))+QkJ, greater product will be obtained or the forward reaction is foroured by

In the reaction AB_((g))hArrA_((g))+B_((g))at 30^(@)C, K_(p) for the dissociation equlibrium is 2.56xx10^(-2) atm. If the total pressure at equlibrium is I atm, then the precentage dissociation of AB

In the reaction, A_(2(g))+4B_(2(g))hArr2AB_(4(g)) DeltaHlt0 the formation of AB_(4) is will be favoured at

In the reaction, "Acetamide" overset(P_2O_5) to X overset(4H) to Ythe end product is :

In the reaction A_2(g) +4B_2(g) hArr 2AB_3(g) , DeltaH lt 0 .The decomposition of AB_4 (g) will be favoured at

In the reaction Ato2B the concentration of a falls from 1.0M to 0.98 2M in one minute what is the rate of in moles "litre"^(-1)"sec^(-1)

In the reaction : A overset(HBr)rarr B underset("alcohol")overset(KOH)rarr C underset(Zn, H_(2)O)overset(O_(3))rarr HCHO + CH_(3) CHO the compound A is :

In the reaction, A+BhArr2C. at equilibrium, the concenration of A and B is 0.20 molI^(-1) each and that of c was found to be 0.6molI^(-1). tTe equiibrium constant of the reaction is

In the reaction, A+B_(2) rarr AB_(2), identify the limiting reagent, if any, in the following mixtures {:("(i) 300 atoms of A"+"200 molecules of B","(ii) 2 mole A"+"3 mol B"),("(iii) 100 atoms of A"+"100 molecules of B","(iv) 5 mol A"+"2.5 mol B"):}

In the elementary reactionA + Bto AB, if theconcentrationA andB isdoubled, the rateof reactionwill

In the reaction, A+B hArr 2C, at equilibrium, the concentration of A and B is 0.20 mol litre^-1 each and that of C was found to be 0.60 mol litre^-1. The equilibrium constant of the reaction ?

In the reaction A+3BrArr2C, initially 10 mole each ofA and B were taken . If equilibrium pressure is 8 atm andalpha " of "A=20%then K_(p) will be:-

In the reaction a+3B rarr 2C, the rate of formation of C is

In the reaction, A+ 2B rarr 3C+D which of the following expression does not describe changes in the. concentration of various species as a function of. time:

In the reaction A+2B hArr 2C, if 2 moles of A, 3.0 moles of B and 2.0 moles of C are placed in a 2.0 I flask and the equilibrium ocncentration of C is 0.5 mole /I. The equlibrium constant (K_(c)) for the reaction is

The missing nucleide in the nuclear reaction : ""_(93)^(239)Npto.......+_(-1)^(0)e is

In the reaction : ""_(93)^(239)Npto""_(94)^(239)Pu+? The missing particle is :

In the reaction : ""_(84)^(215)Poto""_(82)^(211)Pb+""_(2)^(4)He If Pb belongs to group 14, Po belongs to group

In the reaction, 4NH_(3)(3(g)) + 5O_(2)(g) to 4NO_(g) + 6H_(2)O_(l) when 1 mol of ammonia and 1 mol of O_(2)are made to react to completion then

In the reaction, 4NH_(3)(g)+5O_(2)(g)rarr4NO(g)+6H_(2)O(l), when 1 mole of ammonia and 1 mole of O_(2) are made to react to completion

In the reaction 4NaCl+MnO_(2)+4H_(2)SO_(4)toMnCl_(2)+4NaHSO_(4)+2H_(2)O+'X'Then the correct statement regarding 'X' are I) It is a greenish yellow coloured gas . II) It can also be prepared by Deacons process III) It can be liquefied into greenish yellow liquid which boils at 239K

In thereaction, 4P + 3KOH + 3H_2O rarr3KH_2PO_2+PH_3

In the reaction 4Fe+3O_(2)rarr4Fe^(3+)+6O^(2-) Which of the following statements is incorrect?