52671 + Interview Questions in Chemistry in Class 11

1.	In visible spectrumwhichcolourhas minimumenergy?State ite wavelengthand frequency.
Answer» SOLUTION :Redcolourhas minimum energy Wavelength`(lambda) : 760 nm (760 A)` Frequency`( F): 4 xx 10^(14) HZ`

Discussion

2.	In view of the signs of Delta_(r)G^(@)for the following reactions : PbO_(2)+ Pb rarr 2PbO, Delta_(r)G^(@)lt 0 SnO_92)+Sn rarr2SnO, Delta_(r)G^(@) gt 0 Which oxidation states are more charactersitic for lead and tin?
Answer» For lead `+4`, for TIN `+2` For lead `+2`, for tin `+2` For lead `+4` for tin `+4` For lead `+2`, for tin`+4` Solution :`overset(+4)(PbO_(2))+Pb rarr overset(+2)(2PbO) `. As`Delta_(r)G^(@)lt 0`, i.e., it isnegative , thereaction is spontanoeus in the forward direction, i.e., `Pb^(+2)` is more stable than`Pb^(+4)` `overset(+4)(SnO_(2)) +SN rarr overset(+2)(2SnO)`. As `Delta_(r)G^(@) gt 0`, i.e., it ispositive,reverse reaction will be spotaneous , i.e., `Sn^(+4)` willbe morestable than`Sn^(+2)`. These facts are also supported by the INERT pair EFFECT down the group.

Discussion

3.	In visiblespectrum whichcolourhas maximumenergy? Staticits wavelengthand frequency .
Answer» Solution :Violetcolourhasmaximumenergy WAVELENGTH`(lambda) :380 NM`(3800 A) FREQUENCY(f ) = `7.5 xx 10^(14)Hz`

Discussion

4.	In view of the sign of delta_(n)G^(o) for the following reaction : PbO_2 +Pb rArr 2PbO , delta_(n)G^(o) lt 0 SnO_2+ Sn rarr 2SnO , delta_(n)G^(o) gt 0 Which oxidation states are more characteristic for lead and tin ?
Answer» For lead +4 , for TIN +2 For lead +2 , for tin +2 For lead +2 , for tin +4 For lead +2, for tin +4 Solution :N//A

Discussion

5.	In Victor Meyer's experiment, 0.6 g of a volatile substance displaced 112 mL of air at S.T.P. Find the molecular mass of the substance.
Answer» ANSWER :120

Discussion

6.	In Vector-Meyer's test the colour given by 1^(@), 2^(@) and3^(@) alcohols are respectively
Answer» RED, COLOURLESS, BLUE red, blue, colourless colourless, red, violet red, blue, violet Answer :B

Discussion

7.	In vapour phase, BeCl, possess polymer like arrangement.
Answer» SOLUTION :False STATEMENT (BECL, possess polymer like arrangement in solid state.)

Discussion

8.	In van der Waals' equation of state of the gas law, the constnat 'b' is a measure of :
Answer» INTERMOLECULAR COLLISIONS per UNIT volume intermolecular attractions volume OCCUPIED by the molecules intermolecular REPULSIONS Answer :c

Discussion

9.	In van der Waals' equation of state, the constant 'b' is a measure of
Answer» intermolecular repulsion intermolecular attraction volume OCCUPIED by the MOLECULES intermolecular collisions per UNIT volume. Solution :volume occupied by the molecules

Discussion

10.	In Vander Waal's equation of state of the gas law, the constant 'b' is a measure of
Answer» Intermoleculer repulsions Intermolecular COLLISIONS per unit volume Volume occupied by the MOLECULES Intermolecular ATTRACTION Answer :C

Discussion

11.	In two vessels of 1 litre each at the same temperature lg of H_(2)and 1 g of CH_(4) are taken, for these :
Answer» `V_(RMS)` values will be same KINETIC energy per mol will be same Total kinetic energy will same PRESSURE will be same SOLUTION :`(K.ET_1)/(K/E/ T_2) = (n_1 T_1)/(n_2T_2) = 7/1 xx 300/700 = 3/1.`

Discussion

12.	In treatment of cancer ....... salts are used.
Answer» Mg Ca Ra SR SOLUTION :SALTS of Ra are used in radiation THERAPY.

Discussion

13.	In transition elements, the shells that are incompletely filled
Answer» Ultimate SHELL only Penultimate shell only Both ultimate & penultimate shells Outermost THREE shells ANSWER :C

Discussion

14.	In transforming 0.01 mole of PbS to PbSO_(4) , the volume of '10 volume' H_(2)O_(2) required will be
Answer» 11.2 mL 22.4 mL 33.6 mL 44.8 mL SOLUTION :`underset(0.01 "mole")(PBS) + underset(0.04 "mole")(4H_(2)O_(2)) to PbSO_(4) + 4H_(2)O` `underset(0.04 "mole")(4H_(2)O_(2)) to 4H_(2)O + underset(0.02xx22400 mL "at N.T.P.")(2O_(2))` Vol of `O_(2)` at N.T.P. `=0.02xx22400` `=448` mL `THEREFORE` Volume of 10 volume `H_(2)O_(2)` solution `=448//10=44.8` mL.

Discussion

15.	In transforming 0.01 mole of PbSin to PbSO_4 the volume of 10 "volume " H_2O_2 requred will be
Answer» 45mL 45 It 4.5 ML 4.5It SOLUTION :1 mole of `PBS to 4` moles of `H_2O_2` `4 = 10 /11.2xxV (Lt)`

Discussion

16.	In transforming 0.01 mole of PbS to PbSO_(4), the volume of 10 volume H_(2)O_(2) required will be :
Answer» 11.2 mL 22.4 mL 33.6 mL 44.8 mL Solution :`PbS+4H_(2)O_(2) to PbSO_(4)+4H_(2)O` 0.04 mole of `H_(2)O_(2)` is required to REACT with 0.01 mole PbS. Molarity of `H_(2)O_(2)` may be calculated as, Volume strength = Molarity `xx 11.2` `10= M xx 11.2` M=0.892 NUMBER of MOLES`=(MV)/(1000)` `0.04 =(0.892xxV)/(1000)` V=44.8 mL

Discussion

17.	In TLC for compound X R_(f) = 0.7 and for B R_(f)= 0.4 which substance migrate more?
Answer» SOLUTION :COMPOUND X MIGRATE more

Discussion

18.	In TLC, aminoacidsare easilydetectedbyspraying the TLCplatewith _______.
Answer» ninhydrinsolution IODINE ACETONE indigodyesolution Answer :A

Discussion

19.	In three moles of ethane (C_(2)H_(6)), calculate the following: (i) Number of moles of carbon atoms. (ii) Number of moles of hydrogen atoms. (iii) Number of molecules of ethane.
Answer» SOLUTION :(i) 1 MOLE of ETHANE contains 2 moles of carbon ATOMS. `therefore` Number of moles of carbon atoms in 3 moles of ethane `=3 XX 2=6` (ii) 1 mole of ethane contains 6 moles of hydrogen atoms. `therefore`Number of moles of hydrogen atoms in 3 moles of ethane `= 3 xx 6 = 18` (iii) 1 mole of ethane contains `6.022 xx 10^23` (Avogadro.s no.) molecules. `therefore` Number of molecules in 3 moles of ethane `= 3 xx 6.022 xx 10^(23)` `=18.066 xx 10^(23)`

Discussion

20.	In three moles of ethane (C_(2)H_(6)) calculate the following : (i) Number of moles of carbon atoms. (ii) Number of moles of hydrogen atoms. (iii) Number of molecules of ethane.
Answer» Solution :(i) 2 MOL carbon mplecule PRESENT in 1 mole ETHANE. So, 6 mol carbon molecule present in three mol ethane. (ii) 6 mol Hydrogen molecule are in 1 mol ethane `(C_(2)H_(6))`. Therefore in three mole ethane `3xx6 = 18` molecules of hydrogen present. (iii) 1 mol ethane `= 6.022xx10^(23)` ethane molecule `:. 3` mol ethene `= (?)` `= 3 xx 6.022xx10^(23)` `= 18.066xx10^(23)` ethane molecule

Discussion

21.	In three moles of ethane (C_(2)H_(6)) calculate the following:(i) Number of moles of carbon atoms.(ii) Number of moles of hydrogen atoms.(iii) Number of molecules of ethane.
Answer» SOLUTION :(i) 1 mole of `C_(2)H_(6)` contains 2 moles of Carbon atoms. `:.` 3 moles of `C_(2)H_(6)` will have 6 moles of Carbon atoms. (ii) 1 mole of `C_(2)H_(6)` contains 6 moles of Hydrogen atoms. `:.` 3 moles of `C_(2)H_(6)` will have 18 moles of Hydrogen atoms. (III) 1 mole of `C_(2)H_(6)` contains `6.023xx10^(23)` NUMBER of molecules. `:.` 3 moles of `C_(2)H_(6)` will contain `3xx6.023xx10^(23)` molecules.

Discussion

22.	In three dimension wave function may be expressed in spherical co-ordinate system (r,0,phi),r=distance of electron from the nucleus 0= Angle from 'z' axis varying from 0 to pi phi = Angle from 'x' axis …… 0 to 2pi ltbr. Psi may be represented as Psi (r,0,phi)=R (r) .A(0, phi) The R(r) is detemind by 'n' and 'l'. The A (0,phi) is determined by 'l' and 'm'. Which of the following is R(r) part of '3p' atomic orbital of hydrogen atom ["Given" alpha_(0) = 0.529 "Å"]?
Answer» `(2)/((a_(0))^(3//2))e^(-R//a_(0))` `(2)/(27)((1)/(3a_(0)))^(3//2)(27-18(r)/(a_(0))+2(r)/(a_(0)^(2)))e^(-r//3a_(0))` `(2)/((2a_(0))^(3//2))(2-(r)/(a_(0)))e^(-r//2a_(0))` `(1)/(81 SQRT 3)((2)/(a_(0)))^(3//2)(6-(r)/(a_(0)))e^(-r//3a_(0))` Answer :d

Discussion

23.	In this, sulhonation is most favorable at the carbon number.
Answer» 1 2 3 4 Solution :`SO_(3)` can attack on 4th and 2ND POSITION but DUE to steric crowding 2nd position is most favourable..

Discussion

24.	In this reaction, the main product is
Answer» PICRIC acid 3, 5-Dinitrosalicylic acid 3-Nitrosalicylic acid `m-` Nitrobenzoic acid Solution :During the NITRATION of salicylic acid, DECARBOXYLATION also takes PLACE. THEREFORE the main product acid

Discussion

25.	In this reaction CO_((g)) + H_2O_((g)) hArr CO_(2(g)) + H_(2(g)) initially [CO]=0.1 M and at equilibrium [CO]=0.067 M so, in this reaction will K_c gt 0 or K_c lt 0 ?
Answer» Solution :The REACTION is FORWARD because REACTANT is DECREASES. If the reaction is forward `K_c gt 0` and positive.

Discussion

26.	In this reaction ozone acts as:
Answer» an oxidisng agent a REDUCING agent a DEHYDRATING agent a hydrating agent Answer :A

Discussion

27.	In this reaction CO_((g)) + H_2O_((g)) hArr CO_(2(g)) + H_(2(g)) initially [CO]=0.1 M and at equilibrium [CO]=0.067 M so, if K_c=4.24 than what will be the value of K_p ?
Answer» Solution :`K_p=K_c=4.24` as `Deltan_((G))=0,K_p = (K_c)(RT)^(Deltan)` `therefore K_p=K_c`

Discussion

28.	In this reaction 2AuCl_(3) + 3SnCl_(2) to 2Au + 3SnCl_(4) which is an oxidising agent?
Answer» `AuCl_(3)` AU `SnCl_(2)` Both `AuCl_(3)` and `SnCl_(2)` Solution :`AuCl_(3)` undergoes reduction. So, it is an oxidising AGENT.

Discussion

29.	In this paragraph, some statements are given based on isomerism. Read the following statements given for every question and provide the anser Which of the following structures of a cyclic alkene with the lowest number of C atoms shows geometrical isomerism having two meso steroisomers?
Answer» I II Both None Answer :B

Discussion

30.	In this process I_(2) + I^(-) hArr I_(3)^(-) (in aq medium), initially there are 2 mole I_(2) & 2 mole I^(-) . But at equilibrium due to addition of AgNO_(3 (aq)) , 1.75 mole yellow ppt is obtained . K_(C) for the process is ( V_("flask") = 1 dm^(3) ) nearly
Answer» 0.08 0.02 0.16 0.12 Answer :A

Discussion

31.	In this paragraph, some statements are given based on isomerism. Read the following statements given for every question and provide the answer. Which of the following structrues of a cyclic alkene with the lowest number of C atoms shows geometrical isomerism having two meso stereiosomers?
Answer» (I) (II) Both None Answer :B

Discussion

32.	In thermodynamics, a process is called reversible when
Answer» Surroundings and SYSTEM CHANGE into each other There is no boundary between system and surroundings Surroundings are always in EQUILIBRIUM with system System CHANGES into surroundings spontaneously Answer :C

Discussion

33.	In thermo dynamics a process is called reversible when :
Answer» surroundings and system CHANGE into each other there is no BOUNDARY between system and surroundings the surroundings are ALWAYS in equilibrium with system the system chnges into surrounding spontanously Answer :C

Discussion

34.	In thenitration mixture concentrated sulphuric acid is used
Answer» As a sulphonating agent As DEHYDRATING agent For the FORMATION of nucleophile As a solvent Solution :CONC. `H_(2)SO_(4)` is a dehydrating agent

Discussion

35.	In the vicnity of absolute zero , the value of C_p - C_v is
Answer» R ZERO `aT ^(3)` `3//2RT` ANSWER :B

Discussion

36.	In the unit cell of a cubic close-packed structure, total number of voids is __________ whereas in the unit cell of a hexagonal close-packed structure, total number of voids is________
Answer» ANSWER :12,18

Discussion

37.	In the treatment of domestic sewage water, the weight of oxygen that can be required to oxidise 1Omg of carbon is
Answer» 2.67mg 26.7mg 5gr 10gr ANSWER :B

Discussion

38.	In the titration of K_(2)Cr_(2)O_(7) iodometrically, near the end point the colour of the solution becomes :
Answer» GREEN RED yellow blue Solution :N//A

Discussion

39.	In the titration of K_(2)Cr_(2)O_(7) and FeSO_(4), the following data is obtained : V_(1) mL " of " 1M_(1) K_(2)Cr_(2)O_(7) requires V_(2) mL " of " 1M_(2) FeSO_(4). Which of the following relations is true for the above titration ?
Answer» `6 M_(1)V_(1)=M_(2)V_(2)` `M_(1)V_(1)=6M_(2)V_(2)` `M_(1)V_(1)=M_(2)V_(2)` `3M_(1)V_(1)=4M_(2)V_(2)` SOLUTION :`K_(2)Cr_(2)O_(7)+7H_(2)SO_(4)+6FeSO_(4) to K_(2)SO_(4) +Cr_(2)(SO_(4))_(3)+3Fe_(2)(SO_(4))_(3)+7H_(2)O` `(M_(1)V_(1))/(n_(1))(K_(2)Cr_(2)O_(7))=(M_(2)V_(2))/(n_(2))(FeSO_(4))` `(M_(1)V_(1))/(1)=(M_(2)V_(2))/(6)` `6M_(1)V_(1)=M_(2)V_(2)`

Discussion

40.	In the titration of weak acid against strong base match the pH of the solution at different stage of titration.
Answer» SOLUTION :N//A

Discussion

41.	In the titration of nitric acid against potassium carbonate, the indicator used is :
Answer» METHYL orange self indicator phenolphthalein diphenylamine Solution :N//A

Discussion

42.	In the titration of ferrous ammonium sulphate and potassium dichromate, the external indicator used is :
Answer» KCNS `NH_(4)CNS` `K_(3)FE(CN)_(6)` `K_(4)Fe(CN)_(60)` SOLUTION :N//A

Discussion

43.	In the titration of FeSO_(4) against KMnO_(4) in acidic medium, one mole of KMnO_(4) reacts with x moles of FeSO_(4). The value of x is
Answer» 10 8 5 3 Answer :C

Discussion

44.	In the titration of CH_(3)COOH against NaOH, we cannot use the :
Answer» METHYL orange methyl red phenolphthalein bromothymol blue Answer :A::B::D

Discussion

45.	In the titration of a weak acid of known concentratin with a standard solution of a strong base, a ph water was used to follow the progress of the titration. Which of the following is true of this experiment.
Answer» The pH at the EQUIVALENCE point DEPENDS on the INDICATOR used The graph of pH versus volume of base added rises gradually at first and then MUCH more rapidally. The graph of pH versus volume of base added shows no sharp rise. The `[H^(+)]` at the equivalence point equals the ionization constant of the acid Solution :N//A

Discussion

46.	In the titration of acetic acid versus sodium hydroxide , the pH of the solution at equivalence point (whenetemperature is 25^(@)C )is :
Answer» about 5.5 about 6.5 about 7 about 8.5 Solution :`CH_3COOH ` is weakacid , NaOH is STRONG BASE. ` CH_3COONa` UNDERGOES anionic HYDROLYSIS hence basic solution.

Discussion

47.	In the titration ofa weak acid aginst a strong base, at the half-equivalence point (half. Neutralisation )
Answer» `pH = (1)/(2) pK_(a)` `pH = pK_(a)` `pH = 2 pK_(a)` NONE of these Answer :B

Discussion

48.	In the titration of a monoprotic acid with a solution of sodium hydroxide of known concentration, what quantites are equal at the equivalaence point?
Answer» The concentrations of HYDROXIDE and HYDRONIUM ions The number of moles of hydroxide ion ADDED and the number of moles of hydronium ion initially present The VOLUME of sodium hydroxide solution added and the volume of acid solution initially present The number of moles of hydroxide ion added and the number of moles of MONOPROTIC acid initially present Answer :d

Discussion

49.	In the titration of a solutionof weak acid, HX withNaOH ,the pH is 5.8after 10 mL of NaOH solution has been added and 6.40 after 20.0mLof the NaOH has been added. What is the ionisation constant of the acid HX ?
Answer» `7. 94 xx 10 ^(-7) ` ` 7. 94 xx 10 ^(-6) ` ` 7. 94 xx 10 ^(-8) ` ` 7. 94 xx 10 ^(-9) ` Solution :`P^(H) =pK_a +log ""(S)/(A) ` ` 5.8= pKa + log ""(10 xx B)/( A- 10B) ...(1) ` ` 6.4 = pKa +log "" ( 20 xx B)/( A - 20 B ) ...(2) ` ` 0.6 = log ""( 20 B)/( A- 20B) xx (A-10B)/(10B) ` ` 0.6 = log ""(2(A-10 B))/( (A-20B)) =log 4` ` rArr (A- 10B )/( A- 20 B)=2 rArr A =30 B ` substituting in ..........(1) ` 5.8= PKa+ log ""( 10 B)/( 3 0 B - 10 B) ` ` 5.8 = PKa+log ""(10B) /( 30 B -10 B) ` `5.8= pKa +log ""( 1)/(2) ` ` pKa =5.8 -log "" (1)/(2) = 5.8+0.3 =6.1` ` -log KA =6.1 , log Ka = -7 +0.7 = 7 . 9 4 xx 10 ^(-7)`

Discussion

50.	In the thermite reaction used forobtainingenergy, aluminium and ferric oxide reactto fromiron andaluminiumoxide . From the given datw identifytheoption (s)whichis (are ) correct :[Given :Delta H_(f)^(@) Al_(2)O_(3) =- 390 KJ//"mole", DeltaH_(f)^(@) Fe_(2)O_(3)=-176kJ//mol,density ofaliuminium =2.7gm//ml density of Fe_(2)O_(3)=-3.2gm//ml"]
Answer» Maximum calorific value of the FUEL can be`1000 J//gm.` Maximum calorific vale of the fuel can be `(21.4)/(7) kJ//ML`. `2.14 kg` of the mixturecan produce 2500 kJ of heat . `140 ml ` of themixturecan produce 280 kJ of heat . Answer :a,b,d

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In visible spectrumwhichcolourhas minimumenergy?State ite wavelengthand frequency.

In view of the signs of Delta_(r)G^(@)for the following reactions : PbO_(2)+ Pb rarr 2PbO, Delta_(r)G^(@)lt 0 SnO_92)+Sn rarr2SnO, Delta_(r)G^(@) gt 0 Which oxidation states are more charactersitic for lead and tin?

In visiblespectrum whichcolourhas maximumenergy? Staticits wavelengthand frequency .

In view of the sign of delta_(n)G^(o) for the following reaction : PbO_2 +Pb rArr 2PbO , delta_(n)G^(o) lt 0 SnO_2+ Sn rarr 2SnO , delta_(n)G^(o) gt 0 Which oxidation states are more characteristic for lead and tin ?

In Victor Meyer's experiment, 0.6 g of a volatile substance displaced 112 mL of air at S.T.P. Find the molecular mass of the substance.

In Vector-Meyer's test the colour given by 1^(@), 2^(@) and3^(@) alcohols are respectively

In vapour phase, BeCl, possess polymer like arrangement.

In van der Waals' equation of state of the gas law, the constnat 'b' is a measure of :

In van der Waals' equation of state, the constant 'b' is a measure of

In Vander Waal's equation of state of the gas law, the constant 'b' is a measure of

In two vessels of 1 litre each at the same temperature lg of H_(2)and 1 g of CH_(4) are taken, for these :

In treatment of cancer ....... salts are used.

In transition elements, the shells that are incompletely filled

In transforming 0.01 mole of PbS to PbSO_(4) , the volume of '10 volume' H_(2)O_(2) required will be

In transforming 0.01 mole of PbSin to PbSO_4 the volume of 10 "volume " H_2O_2 requred will be

In transforming 0.01 mole of PbS to PbSO_(4), the volume of 10 volume H_(2)O_(2) required will be :

In TLC for compound X R_(f) = 0.7 and for B R_(f)= 0.4 which substance migrate more?

In TLC, aminoacidsare easilydetectedbyspraying the TLCplatewith _______.

In three moles of ethane (C_(2)H_(6)), calculate the following: (i) Number of moles of carbon atoms. (ii) Number of moles of hydrogen atoms. (iii) Number of molecules of ethane.

In three moles of ethane (C_(2)H_(6)) calculate the following : (i) Number of moles of carbon atoms. (ii) Number of moles of hydrogen atoms. (iii) Number of molecules of ethane.

In three moles of ethane (C_(2)H_(6)) calculate the following:(i) Number of moles of carbon atoms.(ii) Number of moles of hydrogen atoms.(iii) Number of molecules of ethane.

In this, sulhonation is most favorable at the carbon number.

In this reaction, the main product is

In this reaction CO_((g)) + H_2O_((g)) hArr CO_(2(g)) + H_(2(g)) initially [CO]=0.1 M and at equilibrium [CO]=0.067 M so, in this reaction will K_c gt 0 or K_c lt 0 ?

In this reaction ozone acts as:

In this reaction CO_((g)) + H_2O_((g)) hArr CO_(2(g)) + H_(2(g)) initially [CO]=0.1 M and at equilibrium [CO]=0.067 M so, if K_c=4.24 than what will be the value of K_p ?

In this reaction 2AuCl_(3) + 3SnCl_(2) to 2Au + 3SnCl_(4) which is an oxidising agent?

In this paragraph, some statements are given based on isomerism. Read the following statements given for every question and provide the anser Which of the following structures of a cyclic alkene with the lowest number of C atoms shows geometrical isomerism having two meso steroisomers?

In this process I_(2) + I^(-) hArr I_(3)^(-) (in aq medium), initially there are 2 mole I_(2) & 2 mole I^(-) . But at equilibrium due to addition of AgNO_(3 (aq)) , 1.75 mole yellow ppt is obtained . K_(C) for the process is ( V_("flask") = 1 dm^(3) ) nearly

In this paragraph, some statements are given based on isomerism. Read the following statements given for every question and provide the answer. Which of the following structrues of a cyclic alkene with the lowest number of C atoms shows geometrical isomerism having two meso stereiosomers?

In thermodynamics, a process is called reversible when

In thermo dynamics a process is called reversible when :

In thenitration mixture concentrated sulphuric acid is used

In the vicnity of absolute zero , the value of C_p - C_v is

In the unit cell of a cubic close-packed structure, total number of voids is __________ whereas in the unit cell of a hexagonal close-packed structure, total number of voids is________

In the treatment of domestic sewage water, the weight of oxygen that can be required to oxidise 1Omg of carbon is

In the titration of K_(2)Cr_(2)O_(7) iodometrically, near the end point the colour of the solution becomes :

In the titration of K_(2)Cr_(2)O_(7) and FeSO_(4), the following data is obtained : V_(1) mL " of " 1M_(1) K_(2)Cr_(2)O_(7) requires V_(2) mL " of " 1M_(2) FeSO_(4). Which of the following relations is true for the above titration ?

In the titration of weak acid against strong base match the pH of the solution at different stage of titration.

In the titration of nitric acid against potassium carbonate, the indicator used is :

In the titration of ferrous ammonium sulphate and potassium dichromate, the external indicator used is :

In the titration of FeSO_(4) against KMnO_(4) in acidic medium, one mole of KMnO_(4) reacts with x moles of FeSO_(4). The value of x is

In the titration of CH_(3)COOH against NaOH, we cannot use the :

In the titration of a weak acid of known concentratin with a standard solution of a strong base, a ph water was used to follow the progress of the titration. Which of the following is true of this experiment.

In the titration of acetic acid versus sodium hydroxide , the pH of the solution at equivalence point (whenetemperature is 25^(@)C )is :

In the titration ofa weak acid aginst a strong base, at the half-equivalence point (half. Neutralisation )

In the titration of a monoprotic acid with a solution of sodium hydroxide of known concentration, what quantites are equal at the equivalaence point?

In the titration of a solutionof weak acid, HX withNaOH ,the pH is 5.8after 10 mL of NaOH solution has been added and 6.40 after 20.0mLof the NaOH has been added. What is the ionisation constant of the acid HX ?

In the unit cell of a cubic close-packed structure, total number of voids is __ whereas in the unit cell of a hexagonal close-packed structure, total number of voids is