General Questions and Answers
![The number of naturally occurring p block elements that are diamagnetic b 6 a 18 c 5 d 7](https://media.kunduz.com/media/sug-question-candidate/20200901032158775044-1942629.jpg?w=256)
Physical Chemistry
GeneralThe number of naturally occurring p block elements that are diamagnetic b 6 a 18 c 5 d 7
![In the complex ion ML Mn has five d electrons and L is weak field ligand According to crystal field theor the magnetic properties of the complex ion corresponds to how many unpaired electrons ion 3 2 5 3 21 1 O caning and li pritoh 4 3](https://media.kunduz.com/media/sug-question-candidate/20200809125424608358-668842.jpg?w=256)
Physical Chemistry
GeneralIn the complex ion ML Mn has five d electrons and L is weak field ligand According to crystal field theor the magnetic properties of the complex ion corresponds to how many unpaired electrons ion 3 2 5 3 21 1 O caning and li pritoh 4 3
![1 25 g of a sample of Na CO3 and Na SO is dissolved in 250 ml solution 25 ml of this solution neutralises 20 ml of 0 IN H SO The of Na CO3 in this sample is 2016 a 84 8 b 8 48 c 15 2 d 42 4](https://media.kunduz.com/media/sug-question-candidate/20200904170646164771-1991247.jpg?w=256)
Physical Chemistry
General1 25 g of a sample of Na CO3 and Na SO is dissolved in 250 ml solution 25 ml of this solution neutralises 20 ml of 0 IN H SO The of Na CO3 in this sample is 2016 a 84 8 b 8 48 c 15 2 d 42 4
![3 21 x mol KIO is treated with excess of KI liberates I which was dissolved in freshly prepared starch solution and it is neutralised by 60 mL 0 1 N Na2S O3 until white ppt was obtained What is x a 10 3 mol b 10 5 mol c 5 mol d 6 mol](https://media.kunduz.com/media/sug-question-candidate/20200905141749487540-1884634.jpg?w=256)
Physical Chemistry
General3 21 x mol KIO is treated with excess of KI liberates I which was dissolved in freshly prepared starch solution and it is neutralised by 60 mL 0 1 N Na2S O3 until white ppt was obtained What is x a 10 3 mol b 10 5 mol c 5 mol d 6 mol
![Number of oxygen molecules having weight equal to weight of 20 molecules of SC A 100 B 50 C 15 D 8](https://media.kunduz.com/media/sug-question-candidate/20200808104827837690-1904046.jpg?w=256)
Physical Chemistry
GeneralNumber of oxygen molecules having weight equal to weight of 20 molecules of SC A 100 B 50 C 15 D 8
![10 mL N 100 N HC 20 mL HNO 50 mL 100 N 100 H SO4 were mixed then calculate the pH of resulting solution 1 4 2 2 3 2 3 4 6](https://media.kunduz.com/media/sug-question-candidate/20200807213013063637-668842.jpg?w=256)
Physical Chemistry
General10 mL N 100 N HC 20 mL HNO 50 mL 100 N 100 H SO4 were mixed then calculate the pH of resulting solution 1 4 2 2 3 2 3 4 6
![According to first law of thermodynamics which of the following quantities represents a state function a Grev c Grev Wrev b grev Wrev d Wrev](https://media.kunduz.com/media/sug-question-candidate/20200831152024757828-1711005.jpg?w=256)
Physical Chemistry
GeneralAccording to first law of thermodynamics which of the following quantities represents a state function a Grev c Grev Wrev b grev Wrev d Wrev
![INTERCONVERSIONS OF CONCENTRATION TERMS Calculate the mole ratio of C H OH and CH OH in aqueous solution if molality of C H OH is 40 9 mole fraction of CH OH is 0 1 in solution trys](https://media.kunduz.com/media/sug-question-candidate/20200901064909210800-1886553.jpg?w=256)
Physical Chemistry
GeneralINTERCONVERSIONS OF CONCENTRATION TERMS Calculate the mole ratio of C H OH and CH OH in aqueous solution if molality of C H OH is 40 9 mole fraction of CH OH is 0 1 in solution trys
![The maximum number of molecules are present in 1 15 L of H gas at STP 2 5 L of N gas at STP 3 0 5 g of H gas 4 10 g of O gas](https://media.kunduz.com/media/sug-question-candidate/20200807223346324646-668842.jpg?w=256)
Physical Chemistry
GeneralThe maximum number of molecules are present in 1 15 L of H gas at STP 2 5 L of N gas at STP 3 0 5 g of H gas 4 10 g of O gas
![For the reversible reaction N g 3H g 2NH g At 500 C the value of Kp is 1 44 x 10 5 when partial pressure is measured in atmospheres The corresponding value of Kc with concentration in mole litre is 1 1 44 x 10 5 0 082 500 2 1 44 x 10 5 8 314 x 773 3 1 44 x 105 0 082 773 4 1 44 x 10 5 0 082 773](https://media.kunduz.com/media/sug-question-candidate/20200807223607654442-668842.jpg?w=256)
Physical Chemistry
GeneralFor the reversible reaction N g 3H g 2NH g At 500 C the value of Kp is 1 44 x 10 5 when partial pressure is measured in atmospheres The corresponding value of Kc with concentration in mole litre is 1 1 44 x 10 5 0 082 500 2 1 44 x 10 5 8 314 x 773 3 1 44 x 105 0 082 773 4 1 44 x 10 5 0 082 773
![Heat exchanged in a chemical reaction at the constant temperature and pressure is known as A Internal energy change C enthalpy change A A R C B entropy change D free energy change Ra B D](https://media.kunduz.com/media/sug-question-candidate/20200808063841297818-1888593.jpg?w=256)
Physical Chemistry
GeneralHeat exchanged in a chemical reaction at the constant temperature and pressure is known as A Internal energy change C enthalpy change A A R C B entropy change D free energy change Ra B D
![The temperature at which rate of reaction is doubled as that at 300 K will be 1 300 Kb 2 300 C 125 Y](https://media.kunduz.com/media/sug-question-candidate/20200905143547849837-1461613.jpg?w=256)
Physical Chemistry
GeneralThe temperature at which rate of reaction is doubled as that at 300 K will be 1 300 Kb 2 300 C 125 Y
![Based on the first law of thermodynamics which one of the following is correct a For an isothermal process q w b For an isochoric process AU q c For an adiabatic process AU W](https://media.kunduz.com/media/sug-question-candidate/20200831152453298889-1711005.jpg?w=256)
Physical Chemistry
GeneralBased on the first law of thermodynamics which one of the following is correct a For an isothermal process q w b For an isochoric process AU q c For an adiabatic process AU W
![What is are correct for following reaction Zn HNO3 Zn NO3 2 NO H O A Equivalent wt of HNO3 is 84 C This is disproportionation reaction B Equivalent wt of HNO3 is 21 D 65 g of Zn consume 168 g of HNC At wt of Zn 65](https://media.kunduz.com/media/sug-question-candidate/20200808054123086410-1887605.jpg?w=256)
Physical Chemistry
GeneralWhat is are correct for following reaction Zn HNO3 Zn NO3 2 NO H O A Equivalent wt of HNO3 is 84 C This is disproportionation reaction B Equivalent wt of HNO3 is 21 D 65 g of Zn consume 168 g of HNC At wt of Zn 65
![3 In which following set of compound ion has linear shape 1 CH NH4 BH 3 NO CO XeF 2 CO NO4 BF 4 BeCl BC CH](https://media.kunduz.com/media/sug-question-candidate/20200807200556932287-749650.jpg?w=256)
Physical Chemistry
General3 In which following set of compound ion has linear shape 1 CH NH4 BH 3 NO CO XeF 2 CO NO4 BF 4 BeCl BC CH
![1 Cis Pt en Cl Br 2H O and trans Pd en Br C1 2H O are 1 Ionisation isomer 2 Geometrical isomer 3 Hydrate isomer 4 None of these](https://media.kunduz.com/media/sug-question-candidate/20200809103934792588-668842.jpg?w=256)
Physical Chemistry
General1 Cis Pt en Cl Br 2H O and trans Pd en Br C1 2H O are 1 Ionisation isomer 2 Geometrical isomer 3 Hydrate isomer 4 None of these
![4 In which of the following change observed energy represent first ionisation energy of given element 1 Na s Nag 2 3 Mg g Mg2 g 2 F2 g F g 1 2 4 Cl g Cl g](https://media.kunduz.com/media/sug-question-candidate/20200807223149372195-668842.jpg?w=256)
Physical Chemistry
General4 In which of the following change observed energy represent first ionisation energy of given element 1 Na s Nag 2 3 Mg g Mg2 g 2 F2 g F g 1 2 4 Cl g Cl g
![The total number of neutrons in 36 mL of H O l or water are 1 3 NA 3 24 NA 2 30 NA 4 16 N](https://media.kunduz.com/media/sug-question-candidate/20200807223547295795-668842.jpg?w=256)
Physical Chemistry
GeneralThe total number of neutrons in 36 mL of H O l or water are 1 3 NA 3 24 NA 2 30 NA 4 16 N
![10 6 Some relations of Cp and Cy for an ideal gas i Internal energy U of an ideal gas depends only on the temperature T neither on the pressure P nor the volume V When an ideal gas undergoes a process involving only P V work the heat absorbed by the gas is equal to its internal energy change Therefore for an ideal gas C 89 du or dU Cydr](https://media.kunduz.com/media/sug-question-candidate/20200809110730657673-1664747.jpg?w=256)
Physical Chemistry
General10 6 Some relations of Cp and Cy for an ideal gas i Internal energy U of an ideal gas depends only on the temperature T neither on the pressure P nor the volume V When an ideal gas undergoes a process involving only P V work the heat absorbed by the gas is equal to its internal energy change Therefore for an ideal gas C 89 du or dU Cydr
![If the ionization energy of He is per atom then the energy of Be ion in the second 34 stationary state is 1 4 9 x 10 18 J 2 44 1 x 10 18 J 3 11 025 x 10 18 J 4 None of these](https://media.kunduz.com/media/sug-question-candidate/20200807223859596893-668842.jpg?w=256)
Physical Chemistry
GeneralIf the ionization energy of He is per atom then the energy of Be ion in the second 34 stationary state is 1 4 9 x 10 18 J 2 44 1 x 10 18 J 3 11 025 x 10 18 J 4 None of these
![Which of the following geometrical isomerism 1 Co NH Cl lt 3 Cr en 1 complex does no show 2 Co NH NO 4 Pt gly](https://media.kunduz.com/media/sug-question-candidate/20200809103859949221-668842.jpg?w=256)
Physical Chemistry
GeneralWhich of the following geometrical isomerism 1 Co NH Cl lt 3 Cr en 1 complex does no show 2 Co NH NO 4 Pt gly
![If the masses of Cr and O are in the ratio 13 12 in CrO3 then the ratio of O that combines with the same mass of Cr in Cr O3 and Cr O is 1 1 2 3 37 2 1 4 4 25](https://media.kunduz.com/media/sug-question-candidate/20200904170500631027-1890826.jpg?w=256)
Physical Chemistry
GeneralIf the masses of Cr and O are in the ratio 13 12 in CrO3 then the ratio of O that combines with the same mass of Cr in Cr O3 and Cr O is 1 1 2 3 37 2 1 4 4 25
![13 What is the mass of a molecule of CH 1 16 g 2 26 6 x 1022 g 3 2 66 x 10 23 g 4 16 Ng uing has the highest mass 11](https://media.kunduz.com/media/sug-question-candidate/20200829185340495673-668842.jpg?w=256)
Physical Chemistry
General13 What is the mass of a molecule of CH 1 16 g 2 26 6 x 1022 g 3 2 66 x 10 23 g 4 16 Ng uing has the highest mass 11
![Example 1 If we have 6 w w urea solution with density 1 060 g mL then calculate its strength in](https://media.kunduz.com/media/sug-question-candidate/20200807103151839092-1657489.jpg?w=256)
Physical Chemistry
GeneralExample 1 If we have 6 w w urea solution with density 1 060 g mL then calculate its strength in
![One mole of an ideal gas expands freely and isothermally at 300 K from 10 litres to 100 litres If AU 0 the value of AH is b 200 kJ d 300 kJ a 10 kJ Loke Zero](https://media.kunduz.com/media/sug-question-candidate/20200901074801515507-1711005.jpg?w=256)
Physical Chemistry
GeneralOne mole of an ideal gas expands freely and isothermally at 300 K from 10 litres to 100 litres If AU 0 the value of AH is b 200 kJ d 300 kJ a 10 kJ Loke Zero
![Supposing the I P of H atom is 800 eV Find out the valve of principle quantum number having the energy equal to 50 eV 1 n 2 2 n 3 3 n 4 4 n 1](https://media.kunduz.com/media/sug-question-candidate/20200807212241761839-668842.jpg?w=256)
Physical Chemistry
GeneralSupposing the I P of H atom is 800 eV Find out the valve of principle quantum number having the energy equal to 50 eV 1 n 2 2 n 3 3 n 4 4 n 1
![1 575 g of oxalic acid COOH 2 xH O are dissolved in water and the volume made upto 250 mL On titration 16 68 mL of this solution requires 25mL of N 15 NaOH solution for complete neutralization Calculate x](https://media.kunduz.com/media/sug-question-candidate/20200807001400527340-1903025.jpg?w=256)
Physical Chemistry
General1 575 g of oxalic acid COOH 2 xH O are dissolved in water and the volume made upto 250 mL On titration 16 68 mL of this solution requires 25mL of N 15 NaOH solution for complete neutralization Calculate x
![If a mixture of gases has a total pressure of 100 cm in the Hg and the partial pressure of nitrogen mixture is 25 mm Hg then the per cent of nitrogen in the mixture is a 4 b 40 c 400 d 2 5](https://media.kunduz.com/media/sug-question-candidate/20200808030447146903-1905521.jpg?w=256)
Physical Chemistry
GeneralIf a mixture of gases has a total pressure of 100 cm in the Hg and the partial pressure of nitrogen mixture is 25 mm Hg then the per cent of nitrogen in the mixture is a 4 b 40 c 400 d 2 5
![In a sample of NH3 g 18 x 1022 atoms of hydrogen are present then find out the volume of NH g at STP 1 2 24 L 3 4 48 L 2 1 12 L 4 6 72 L](https://media.kunduz.com/media/sug-question-candidate/20200807212223800757-668842.jpg?w=256)
Physical Chemistry
GeneralIn a sample of NH3 g 18 x 1022 atoms of hydrogen are present then find out the volume of NH g at STP 1 2 24 L 3 4 48 L 2 1 12 L 4 6 72 L
![60 mL 0 1 M KMnO4 is treated with excess of FeC 0 n presence of H SO4 The volume of CO gar measured at STP obtained is 1 448 mL 3 224 mL 2 672 mL 4 112 mL](https://media.kunduz.com/media/sug-question-candidate/20200807001230105049-1903025.jpg?w=256)
Physical Chemistry
General60 mL 0 1 M KMnO4 is treated with excess of FeC 0 n presence of H SO4 The volume of CO gar measured at STP obtained is 1 448 mL 3 224 mL 2 672 mL 4 112 mL
![3 Zn reduce Mg2 4 Zn reduces Fe2 2 Deduce from the following E values of half cells what combination of two half cells would results in a cell with the largest potential I A eA E 0 24 V II BO eB III C 2e C iv D 2e D 1 II IV 3 III IV E 1 25 V E 1 25 V E 0 68 V 2 II III 4 I II all reaction](https://media.kunduz.com/media/sug-question-candidate/20200807103146433731-1898608.jpg?w=256)
Physical Chemistry
General3 Zn reduce Mg2 4 Zn reduces Fe2 2 Deduce from the following E values of half cells what combination of two half cells would results in a cell with the largest potential I A eA E 0 24 V II BO eB III C 2e C iv D 2e D 1 II IV 3 III IV E 1 25 V E 1 25 V E 0 68 V 2 II III 4 I II all reaction
![7 A gas deviates from ideal behaviour at a high pressure because its molecules a attract one another b show the Tyndall effect c have kinetic energy 1 bu noualent bonds](https://media.kunduz.com/media/sug-question-candidate/20200831172011977955-1942629.jpg?w=256)
Physical Chemistry
General7 A gas deviates from ideal behaviour at a high pressure because its molecules a attract one another b show the Tyndall effect c have kinetic energy 1 bu noualent bonds
![The weight of one molecule of a compound C6H122 is 60 1 1 2 x 10 20 gm 2 1 4 x 10 21 gm 3 5 025 x 10 3 am](https://media.kunduz.com/media/sug-question-candidate/20200807223239602312-668842.jpg?w=256)
Physical Chemistry
GeneralThe weight of one molecule of a compound C6H122 is 60 1 1 2 x 10 20 gm 2 1 4 x 10 21 gm 3 5 025 x 10 3 am
![9 The atomic weight of a metal M is 27 and its equivalent weight is 9 the formula of its chloride will be 1 MCL 3 M Cl 2 MC1 4 MCL3](https://media.kunduz.com/media/sug-question-candidate/20200829232159005077-668842.jpg?w=256)
Physical Chemistry
General9 The atomic weight of a metal M is 27 and its equivalent weight is 9 the formula of its chloride will be 1 MCL 3 M Cl 2 MC1 4 MCL3
![2 76 g of silver carbonate on being strongly heated yields a residue weighing Ag CO 2Ag CO 2O 2 2 2 48 g 4 2 64 g 1 2 16 g 3 2 32 g](https://media.kunduz.com/media/sug-question-candidate/20200829175029875999-668842.jpg?w=256)
Physical Chemistry
General2 76 g of silver carbonate on being strongly heated yields a residue weighing Ag CO 2Ag CO 2O 2 2 2 48 g 4 2 64 g 1 2 16 g 3 2 32 g
![Which reaction does not involve neither oxidation nor reduction 1 VO V 03 3 Cro2Cr 0 2 Na Na 4 Zn Zn](https://media.kunduz.com/media/sug-question-candidate/20200807000829779600-1903025.jpg?w=256)
Physical Chemistry
GeneralWhich reaction does not involve neither oxidation nor reduction 1 VO V 03 3 Cro2Cr 0 2 Na Na 4 Zn Zn
![UMP 5 A glass bulb of 1 litre capacity contains 2 10 1 molecules of nitrogen exerting pressure of 7 57 x 10 Nm 2 Calculate the root mean square speed and the temperature of gas molecules If the ratio of up to Urms is 0 82 calculate up for these molecules at this temperature IIT 1993](https://media.kunduz.com/media/sug-question-candidate/20200711063752204992-1648442.jpg?w=256)
Physical Chemistry
GeneralUMP 5 A glass bulb of 1 litre capacity contains 2 10 1 molecules of nitrogen exerting pressure of 7 57 x 10 Nm 2 Calculate the root mean square speed and the temperature of gas molecules If the ratio of up to Urms is 0 82 calculate up for these molecules at this temperature IIT 1993
![disproportionation reaction Cr 0 1 CrO5 2 103 I H I 3 CrO Cl NaOH Na CrO4 NaCl H O 4 Na S O3 H SO4 Na SO4 SO2 S8 H O](https://media.kunduz.com/media/sug-question-candidate/20200807000900382177-1903025.jpg?w=256)
Physical Chemistry
Generaldisproportionation reaction Cr 0 1 CrO5 2 103 I H I 3 CrO Cl NaOH Na CrO4 NaCl H O 4 Na S O3 H SO4 Na SO4 SO2 S8 H O
![6 Which of the following statements is incorrect a Pure sodium metal dissolves in liquid ammonia to give blue solution b NaOH reacts with glass to give sodium silicate c Aluminium reacts with excess NaOH to give Al OH 3 d NaHCO on heating gives Na CO3](https://media.kunduz.com/media/sug-question-candidate/20200829134519824486-1960875.jpg?w=256)
Physical Chemistry
General6 Which of the following statements is incorrect a Pure sodium metal dissolves in liquid ammonia to give blue solution b NaOH reacts with glass to give sodium silicate c Aluminium reacts with excess NaOH to give Al OH 3 d NaHCO on heating gives Na CO3
![molarity 1000 1000xd molarity xm late molarity of CaCO aq solution which has concentration of CaCO molality 200 p](https://media.kunduz.com/media/sug-question-candidate/20200807103448008348-1657489.jpg?w=256)
Physical Chemistry
Generalmolarity 1000 1000xd molarity xm late molarity of CaCO aq solution which has concentration of CaCO molality 200 p
![Q 50 An aqueous solution of KIO3 was treated with excess of KI solution The solution is acidified HCl The liberated I2 consumed 10ml of 1 0M thiosulphate solution to decolourise starch iodine cor Then millimoles of KIO3 consumed are](https://media.kunduz.com/media/sug-question-candidate/20200903124755985548-1985040.jpg?w=256)
Physical Chemistry
GeneralQ 50 An aqueous solution of KIO3 was treated with excess of KI solution The solution is acidified HCl The liberated I2 consumed 10ml of 1 0M thiosulphate solution to decolourise starch iodine cor Then millimoles of KIO3 consumed are
![1 c c N O at NTP contains 1 8 224 1 2 3 x102 2 atoms 6 02 22400 1 32 224 x1023 molecules 23 10 3 electrons AS ATT of above](https://media.kunduz.com/media/sug-question-candidate/20200807215334780712-668842.jpg?w=256)
Physical Chemistry
General1 c c N O at NTP contains 1 8 224 1 2 3 x102 2 atoms 6 02 22400 1 32 224 x1023 molecules 23 10 3 electrons AS ATT of above
![5 If the four tyres of car are filled to the same pressure with N O H and Ne separately then which one will be filled first 1 N 3 H 2 0 4 Ne](https://media.kunduz.com/media/sug-question-candidate/20200808180844714356-1890826.jpg?w=256)
Physical Chemistry
General5 If the four tyres of car are filled to the same pressure with N O H and Ne separately then which one will be filled first 1 N 3 H 2 0 4 Ne
![A solution containing 2 68 x 10 3 mol of An ions requires 1 61 10 3 mol of MnO2 for the complete oxidation of Ant to AO in acidic medium What is the value of n](https://media.kunduz.com/media/sug-question-candidate/20200807001332985755-1903025.jpg?w=256)
Physical Chemistry
GeneralA solution containing 2 68 x 10 3 mol of An ions requires 1 61 10 3 mol of MnO2 for the complete oxidation of Ant to AO in acidic medium What is the value of n
![A certain ion Xn is oxidized successively to XO2 and then XO by a powerful oxidizing agent If the number of moles of the oxidizing agent required in the successive steps of oxidation are in the ratio 4 1 n is 1 3 3 2 2 1 4 4](https://media.kunduz.com/media/sug-question-candidate/20200807001018541535-1903025.jpg?w=256)
Physical Chemistry
GeneralA certain ion Xn is oxidized successively to XO2 and then XO by a powerful oxidizing agent If the number of moles of the oxidizing agent required in the successive steps of oxidation are in the ratio 4 1 n is 1 3 3 2 2 1 4 4
![95 Molar enthalpy of combustion for C H g C graphite and H g are 1300 394 and 286 KJ mole respectively then calculate of C C bond in KJ mole AHSub C graphite C graphite 715 KJ mole AHRE H H 436 KJ mole BE AHRE C H 413 KJ mole BE 1 415 3 1215dal 2 610 4 814](https://media.kunduz.com/media/sug-question-candidate/20200901094918274407-1461613.jpg?w=256)
Physical Chemistry
General95 Molar enthalpy of combustion for C H g C graphite and H g are 1300 394 and 286 KJ mole respectively then calculate of C C bond in KJ mole AHSub C graphite C graphite 715 KJ mole AHRE H H 436 KJ mole BE AHRE C H 413 KJ mole BE 1 415 3 1215dal 2 610 4 814
![25 The volume in mL of 0 1 M AgNO3 required to completely precipitate the chloride ions present in 30 mL of 0 01 M of Cr H O 5CI Cl as silver chloride is close to](https://media.kunduz.com/media/sug-question-candidate/20200807005822813554-1903025.jpg?w=256)
Physical Chemistry
General25 The volume in mL of 0 1 M AgNO3 required to completely precipitate the chloride ions present in 30 mL of 0 01 M of Cr H O 5CI Cl as silver chloride is close to
![If the weight of metal chloride is x gram containing y gram of metal the equivalent weight of metal will be 1 E x35 5 y 3 E Yx35 5 x y 2 E 4 E 8 y x X 8 x y y](https://media.kunduz.com/media/sug-question-candidate/20200831050148681736-1970144.jpg?w=256)
Physical Chemistry
GeneralIf the weight of metal chloride is x gram containing y gram of metal the equivalent weight of metal will be 1 E x35 5 y 3 E Yx35 5 x y 2 E 4 E 8 y x X 8 x y y
![0 2 g of a sample of H O2 required 10 ml of IN KMnO4 in a titration in the presence of H SO4 Purity of H O2 is A 25 C 85 B 65 D None of these of KMnO that will be needed](https://media.kunduz.com/media/sug-question-candidate/20200902080446186872-1951111.jpg?w=256)
Physical Chemistry
General0 2 g of a sample of H O2 required 10 ml of IN KMnO4 in a titration in the presence of H SO4 Purity of H O2 is A 25 C 85 B 65 D None of these of KMnO that will be needed
![In chromite ore the oxidation number of iron and chromium are respectively a 3 2 b 3 6 c 2 6 d 2 3](https://media.kunduz.com/media/sug-question-candidate/20200901032143567136-1942629.jpg?w=256)
Physical Chemistry
GeneralIn chromite ore the oxidation number of iron and chromium are respectively a 3 2 b 3 6 c 2 6 d 2 3