46295 + Interview Questions in Chemistry

1.	Sodium oxalate on heating with conc H2SO4 gives
Answer» Sodium oxalate on heating with conc $H_{2} S O_{4}$ gives

Discussion

2.	In a hexagonal close packing, the edge length of base of a unit cell is 100 pm. Find the volume of the hcp unit cell if the height of the cell is 160 pm.
Answer» In a hexagonal close packing, the edge length of base of a unit cell is $100 p m$ . Find the volume of the hcp unit cell if the height of the cell is $160 p m$ .

Discussion

3.	Add the missing alphabet:
Answer» Add the missing alphabet:

Discussion

4.	Match the following gas laws with the equation representing them. A.Boyle′s law1. V∝n at constant T and pB.Charle′s law2. pTotal=p1+p2+p3+⋯at constant T,VC.Dalton′s3. pVT=constantD.Avogadro′slaw4. V∝T at constant n and p5. p∝1Vat constant n and T
Answer» Match the following gas laws with the equation representing them. $\begin{matrix} A . & B o y l e^{'} s l a w & 1. V \propto n a t c o n s t a n t T a n d p B . & C h a r l e^{'} s l a w & 2. p_{T o t a l} = p_{1} + p_{2} + p_{3} + \dots a t c o n s t a n t T, V C . & D a l t o n^{'} s & 3. \frac{p V}{T} = c o n s t a n t D . & A v o g a d r o^{'} s l a w & 4. V \propto T a t c o n s t a n t n a n d p 5. p \propto \frac{1}{V} a t c o n s t a n t n a n d T \end{matrix}$

4.

Match the following gas laws with the equation representing them. A.Boyle′s law1. V∝n at constant T and pB.Charle′s law2. pTotal=p1+p2+p3+⋯at constant T,VC.Dalton′s3. pVT=constantD.Avogadro′slaw4. V∝T at constant n and p5. p∝1Vat constant n and T

Answer»

Match the following gas laws with the equation representing them.

$\begin{matrix} A . & B o y l e^{'} s l a w & 1. V \propto n a t c o n s t a n t T a n d p B . & C h a r l e^{'} s l a w & 2. p_{T o t a l} = p_{1} + p_{2} + p_{3} + \dots a t c o n s t a n t T, V C . & D a l t o n^{'} s & 3. \frac{p V}{T} = c o n s t a n t D . & A v o g a d r o^{'} s l a w & 4. V \propto T a t c o n s t a n t n a n d p 5. p \propto \frac{1}{V} a t c o n s t a n t n a n d T \end{matrix}$

Discussion

5.	What is kinetic energy ?What is resistance?
Answer» What is kinetic energy ? What is resistance?

Discussion

6.	What will be the osmotic pressure of 0.2 M K4[Fe(CN)6] solution at 27 ∘C ?
Answer» What will be the osmotic pressure of 0.2 M $K_{4} [F e (C N)_{6}]$ solution at $27^{\circ} C$ ?

Discussion

7.	In Hofmann bromamide degradation, one of the important steps is the migration of
Answer» In Hofmann bromamide degradation, one of the important steps is the migration of

Discussion

8.	Energy of incident radiation increases from 5 eV to 10 eV. If the threshold wavelength for the given metal surface is 310 nm, find the ratio of maximum kinetic energies of the emitted electrons.
Answer» Energy of incident radiation increases from $5 eV$ to $10 eV$ . If the threshold wavelength for the given metal surface is $310 nm$ , find the ratio of maximum kinetic energies of the emitted electrons.

Discussion

9.	Ph−C≡C−CH3H3O+−−−→HgSO4 Amajor productIn the above reaction, A is:
Answer» $P h - C \equiv C - C H_{3} H_{3} O^{+} - -- \to H g S O_{4} A major product$ In the above reaction, $A$ is:

Discussion

10.	which of the following aqueous solution will boil at lowest temperature \lbrack a\rbrack 0.1m CH3COOH \lbrack b\rbrack 0.1m sucrose \lbrack c\rbrack 0.1m CaCl2 \lbrack d\rbrack 0.1m AgNO3
Answer» which of the following aqueous solution will boil at lowest temperature \lbrack a\rbrack 0.1m CH3COOH \lbrack b\rbrack 0.1m sucrose \lbrack c\rbrack 0.1m CaCl2 \lbrack d\rbrack 0.1m AgNO3

Discussion

11.	If the ionozation potential of the hydrogen atom is 13.6ev, then what will be the longest wavelength needed to remove an electron from the 1st bohr orbit of He+ ion
Answer» If the ionozation potential of the hydrogen atom is 13.6ev, then what will be the longest wavelength needed to remove an electron from the 1st bohr orbit of He+ ion

Discussion

12.	Find the number of hydrogen atom in CH4?
Answer» Find the number of hydrogen atom in CH4?

Discussion

13.	does copper reacts with dilute acids ?
Answer» does copper reacts with dilute acids ?

Discussion

14.	Which of the following is true. 1.the two tautomeric formd differ in stability. 2.tautomers are in dynamic equilibrium with each other. 3. Tautomers are interconvertible. 4. Tautomerism is a reversible intramolecular change. So all of them are true. But it is given that 3rd option is wrong. When I seen explanation of given answer it is given that 3rd option is correct. So plz confirm about it and explain how they are interconvertible with example
Answer» Which of the following is true. 1.the two tautomeric formd differ in stability. 2.tautomers are in dynamic equilibrium with each other. 3. Tautomers are interconvertible. 4. Tautomerism is a reversible intramolecular change. So all of them are true. But it is given that 3rd option is wrong. When I seen explanation of given answer it is given that 3rd option is correct. So plz confirm about it and explain how they are interconvertible with example

14.

Which of the following is true. 1.the two tautomeric formd differ in stability. 2.tautomers are in dynamic equilibrium with each other. 3. Tautomers are interconvertible. 4. Tautomerism is a reversible intramolecular change. So all of them are true. But it is given that 3rd option is wrong. When I seen explanation of given answer it is given that 3rd option is correct. So plz confirm about it and explain how they are interconvertible with example

Answer»

Which of the following is true.

1.the two tautomeric formd differ in stability.

2.tautomers are in dynamic equilibrium with each other.

3. Tautomers are interconvertible.

4. Tautomerism is a reversible intramolecular change.

So all of them are true. But it is given that 3rd option is wrong. When I seen explanation of given answer it is given that 3rd option is correct. So plz confirm about it and explain how they are interconvertible with example

Discussion

15.	The reaction, CO(g)+3H2(g)⇌CH4(g)+H2O(g) is in equilibrium at 1300 K in a one litre flask. The gaseous equilibrium mixture contains 0.30 mol of CO, 0.10 mol of H2 and 0.020 mol of H2O and an unknown amount of CH4 in the flask. Determine the concentration of CH4 in the mixture. The equilibrium constant, Kc for the reaction at the given temperature is 3.90.
Answer» The reaction, $C O (g) + 3 H_{2} (g) ⇌ C H_{4} (g) + H_{2} O (g)$ is in equilibrium at $1300 K$ in a one litre flask. The gaseous equilibrium mixture contains $0.30 m o l$ of $C O$ , $0.10 m o l$ of $H_{2}$ and $0.020 m o l$ of $H_{2} O$ and an unknown amount of $C H_{4}$ in the flask. Determine the concentration of $C H_{4}$ in the mixture. The equilibrium constant, $K_{c}$ for the reaction at the given temperature is 3.90.

Discussion

16.	Why distance between corner and tetrahedral void in a ccp structure is (square root)3a÷4?
Answer» Why distance between corner and tetrahedral void in a ccp structure is (square root)3a÷4?

Discussion

17.	For the reaction: C2H6→C2H4+H2 : The reaction enthalpy ΔrH= ______ kJ mol–1. (Round off to the Nearest Integer).[Given: Bond enthalpies in kJ mol–1; C – C: 347; C = C : 611; C – H : 414; H – H : 436]
Answer» For the reaction: $C_{2} H_{6} \to C_{2} H_{4} + H_{2}$ : The reaction enthalpy $Δ_{r} H =$ ______ ${kJ mol}^{- 1}$ . (Round off to the Nearest Integer). [Given: Bond enthalpies in ${kJ mol}^{- 1}$ ; C – C: 347; C = C : 611; C – H : 414; H – H : 436]

Discussion

18.	100ml of 5M NaOH solution was diluted by adding water so that final molarity becomes 0.5M .Volume of water added to solution is
Answer» 100ml of 5M NaOH solution was diluted by adding water so that final molarity becomes 0.5M .Volume of water added to solution is

Discussion

19.	What is the relationship between molality,molarity and density of a solution?
Answer» What is the relationship between molality,molarity and density of a solution?

Discussion

20.	Assuming the water vapour is an ideal gas, the internal energy change (ΔU) in kJ when 1 mole of water is vapourised at 177∘C. (Given molar enthalpy of vapourisation of water 177∘C = 37 kJ/mol and R=253 J/molK)
Answer» Assuming the water vapour is an ideal gas, the internal energy change $(Δ U)$ in kJ when 1 mole of water is vapourised at $177^{\circ} C$ . (Given molar enthalpy of vapourisation of water $177^{\circ} C$ = 37 kJ/mol and $R = \frac{25}{3} J/molK$ )

Discussion

21.	The C−C bond length is maximum in
Answer» The $C - C$ bond length is maximum in

Discussion

22.	Order of decreasing acidity of (i) HCOOH (ii)CH3COOH (iii)Cl2CHCOOH (iv)CF3COOH is
Answer» Order of decreasing acidity of $(i) H C O O H (i i) C H_{3} C O O H (i i i) C l_{2} C H C O O H (i v) C F_{3} C O O H i s$

22.

Order of decreasing acidity of (i) HCOOH (ii)CH3COOH (iii)Cl2CHCOOH (iv)CF3COOH is

Answer»

Order of decreasing acidity of

$(i) H C O O H (i i) C H_{3} C O O H (i i i) C l_{2} C H C O O H (i v) C F_{3} C O O H i s$

Discussion

23.	Reaction Involving cyclic interme/H2Odiate and anti-addition is(1) CH2=CH2\xrightarrow[{}]{H+/H2O}(2) CH3CH=CH2\xrightarrow[{}]{HX}(3) CH3CH=CH2\xrightarrow[{NaBH4}]{Hg(OAc)2/H2O}(4) CH2=CH2\xrightarrow[{H2O2/OH}]{B2H6/THF
Answer» Reaction Involving cyclic interme/H2Odiate and anti-addition is(1) CH2=CH2\xrightarrow[{}]{H+/H2O}(2) CH3CH=CH2\xrightarrow[{}]{HX}(3) CH3CH=CH2\xrightarrow[{NaBH4}]{Hg(OAc)2/H2O}(4) CH2=CH2\xrightarrow[{H2O2/OH}]{B2H6/THF

Discussion

24.	In which of the following is the removal of Cl− most difficult?
Answer» In which of the following is the removal of $C l^{-}$ most difficult?

Discussion

25.	which of the following molecule exhibits conformational isomerism:- (1) CH4 (2)CF4 (3) CH3OH (4) CH2O
Answer» which of the following molecule exhibits conformational isomerism:- (1) CH4 (2)CF4 (3) CH3OH (4) CH2O

Discussion

26.	49 g of sulphuric acid are dissolved in 250 ml of the solution. Its molarity will be
Answer» 49 g of sulphuric acid are dissolved in 250 ml of the solution. Its molarity will be

Discussion

27.	for the equilibrium S02Cl2=SO2+Cl2 what is the temperature at which Kp(atm)/Kc(M)=3 1.0.027K 2.0.36K 3.36.54K 4.273K
Answer» for the equilibrium S02Cl2=SO2+Cl2 what is the temperature at which Kp(atm)/Kc(M)=3 1.0.027K 2.0.36K 3.36.54K 4.273K

Discussion

28.	The total number of geometrical isomers possible for following compound is:
Answer» The total number of geometrical isomers possible for following compound is:

Discussion

29.	26.The molecular mass of O2 and SO2 are 32 and 64 respectively.If one litre of O2 at at 15 degree ceisius and 750mm pressure contains N molecules, the number of molecules in two litres of S02 under the same conditions of temperature and pressure will be A N/2 B 4N C N D 2N
Answer» 26.The molecular mass of O2 and SO2 are 32 and 64 respectively.If one litre of O2 at at 15 degree ceisius and 750mm pressure contains N molecules, the number of molecules in two litres of S02 under the same conditions of temperature and pressure will be A N/2 B 4N C N D 2N

Discussion

30.	In an atom, an electron is moving with a speed of 600 m sec−1 with an accuracy of 0.005%. Certainty with which the position of the electron can be located is
Answer» In an atom, an electron is moving with a speed of $600 m s e c^{- 1}$ with an accuracy of 0.005%. Certainty with which the position of the electron can be located is

Discussion

31.	The maximum amount of magnesium oxide formedwhen 16 g of Mg is burnt with 16 g of O2 in a closedvessel is(1) 26.67 g(3) 32 g40 g(4) 24.67 g
Answer» The maximum amount of magnesium oxide formedwhen 16 g of Mg is burnt with 16 g of O2 in a closedvessel is(1) 26.67 g(3) 32 g40 g(4) 24.67 g

Discussion

32.	Among the following, the molecule with the highest dipole moment is:
Answer» Among the following, the molecule with the highest dipole moment is:

Discussion

33.	De broglie equation derivation ?
Answer» De broglie equation derivation ?

Discussion

34.	Carbyl amine test is performed in alcoholic KOH by heating a mixture of
Answer» Carbyl amine test is performed in alcoholic KOH by heating a mixture of

Discussion

35.	38.Comparison between thermal resistivity and electrical resistivity
Answer» 38.Comparison between thermal resistivity and electrical resistivity

Discussion

36.	Iron(II)oxide crystallise in cubic structure with unit cell edge length of 5 A∘. If the density of oxide is 3.8 g cm−3. Calculate the number of Fe2+ ions present in each unit cell.[ Molar mass of Fe=56 g/mol ]
Answer» Iron $(II)$ oxide crystallise in cubic structure with unit cell edge length of $5 A^{\circ}$ . If the density of oxide is $3.8 {g cm}^{- 3}$ . Calculate the number of $F e^{2 +}$ ions present in each unit cell. [ Molar mass of $F e = 56 g/mol$ ]

Discussion

37.	A constant current (0.5 amp) is passed for 1 hour through (i) aqueous AgNO3, (ii) aqueous CuSO4 and (iii) molten AlF3, separately. The ratio of the mass of the metals deposited on the cathode is: [MAg, MCu, MAl are molar masses of the respective metals]
Answer» A constant current (0.5 amp) is passed for 1 hour through (i) aqueous $A g N O_{3}$ , (ii) aqueous $C u S O_{4}$ and (iii) molten $A l F_{3}$ , separately. The ratio of the mass of the metals deposited on the cathode is: [ $M_{A g}, M_{C u}, M_{A l}$ are molar masses of the respective metals]

Discussion

38.	why is writing considered as no work done?
Answer» why is writing considered as no work done?

Discussion

39.	NH3 dissociates completely with HCl to form NH4+ and Cl-But why doesnt NH3 dissociate completely in H2O to for NH4+ and OH-?
Answer» NH3 dissociates completely with HCl to form NH4+ and Cl- But why doesnt NH3 dissociate completely in H2O to for NH4+ and OH-?

Discussion

40.	which of the following bonds had highest bond energy1.H-H Bond in H22.C-C bond in C2H63.N-N bond N2H44.O-O bond in H2O2
Answer» which of the following bonds had highest bond energy 1.H-H Bond in H2 2.C-C bond in C2H6 3.N-N bond N2H4 4.O-O bond in H2O2

Discussion

41.	Compare dipole moment of h2s and so2
Answer» Compare dipole moment of h2s and so2

Discussion

42.	The emf of a cell corresponding to the reaction Zn(s) + 2H+(aq)→Zn2+(0.1 M) + H2(g, 1 bar) is 0.28 V at 25∘ C. Calculate the pH of the solution at the hydrogen electrode. Given E∘Zn2+\|Zn=−0.763 V
Answer» The emf of a cell corresponding to the reaction $Z n (s) + 2 H^{+} (aq) \to Z n^{2 +} (0.1 M) + H_{2} (g, 1 bar)$ is $0.28 V$ at $25^{\circ} C$ . Calculate the pH of the solution at the hydrogen electrode. Given $E_{Z n^{2 +} \| Z n}^{\circ} = - 0.763 V$

Discussion

43.	one mole of an ideal gas at 25° celsius expands in volume from 1.0 l to 4.0 l at constant temperature what work in joule is done if the gas expands against vacuum (p external= 0)?
Answer» one mole of an ideal gas at 25° celsius expands in volume from 1.0 l to 4.0 l at constant temperature what work in joule is done if the gas expands against vacuum (p external= 0)?

Discussion

44.	Na_2CO_3+H_2O+CO_2→(A) white ceystalline powder (A) on reaction with phenolphthalein gives which colo
Answer» Na_2CO_3+H_2O+CO_2→(A) white ceystalline powder (A) on reaction with phenolphthalein gives which colo

Discussion

45.	The value of critical temperature in terms of Vander Wall's constants a&b is given
Answer» The value of critical temperature in terms of Vander Wall's constants a&b is given

Discussion

46.	Hybridisation of [ScF6]3-
Answer» Hybridisation of [ScF6]3-

Discussion

47.	47. What should be the order of energy of 2s electron for H,Li,Na,K, and why?
Answer» 47. What should be the order of energy of 2s electron for H,Li,Na,K, and why?

Discussion

48.	The compound which is not sp3 hybridisation (1)[Ni(CO)], { (2) \lbrack Cu(NH_3)_4\rbrack{ (3) \lbrack NiCl_4\rbrack^{2-{ (4) \lbrack Zn(NH_3)_4\rbrack^{2+
Answer» The compound which is not sp3 hybridisation (1)[Ni(CO)], { (2) \lbrack Cu(NH_3)_4\rbrack{ (3) \lbrack NiCl_4\rbrack^{2-{ (4) \lbrack Zn(NH_3)_4\rbrack^{2+

Discussion

49.	Which of the following ligands is/are π acceptor(s)?
Answer» Which of the following ligands is/are π acceptor(s)?

Discussion

50.	The value of equilibrium cons†an t for self-ionization of water is - 1)55.5×10^{-18} 2)5.55×10^{-18} 3)3.25×10^{-18} 4)1×10^{-1
Answer» The value of equilibrium cons†an t for self-ionization of water is - 1)55.5×10^{-18} 2)5.55×10^{-18} 3)3.25×10^{-18} 4)1×10^{-1

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Sodium oxalate on heating with conc H2SO4 gives

In a hexagonal close packing, the edge length of base of a unit cell is 100 pm. Find the volume of the hcp unit cell if the height of the cell is 160 pm.

Add the missing alphabet:

Match the following gas laws with the equation representing them. A.Boyle′s law1. V∝n at constant T and pB.Charle′s law2. pTotal=p1+p2+p3+⋯at constant T,VC.Dalton′s3. pVT=constantD.Avogadro′slaw4. V∝T at constant n and p5. p∝1Vat constant n and T

What is kinetic energy ?What is resistance?

What will be the osmotic pressure of 0.2 M K4[Fe(CN)6] solution at 27 ∘C ?

In Hofmann bromamide degradation, one of the important steps is the migration of

Energy of incident radiation increases from 5 eV to 10 eV. If the threshold wavelength for the given metal surface is 310 nm, find the ratio of maximum kinetic energies of the emitted electrons.

Ph−C≡C−CH3H3O+−−−→HgSO4 Amajor productIn the above reaction, A is:

which of the following aqueous solution will boil at lowest temperature \lbrack a\rbrack 0.1m CH3COOH \lbrack b\rbrack 0.1m sucrose \lbrack c\rbrack 0.1m CaCl2 \lbrack d\rbrack 0.1m AgNO3

If the ionozation potential of the hydrogen atom is 13.6ev, then what will be the longest wavelength needed to remove an electron from the 1st bohr orbit of He+ ion

Find the number of hydrogen atom in CH4?

does copper reacts with dilute acids ?

Why distance between corner and tetrahedral void in a ccp structure is (square root)3a÷4?

For the reaction: C2H6→C2H4+H2 : The reaction enthalpy ΔrH= ______ kJ mol–1. (Round off to the Nearest Integer).[Given: Bond enthalpies in kJ mol–1; C – C: 347; C = C : 611; C – H : 414; H – H : 436]

100ml of 5M NaOH solution was diluted by adding water so that final molarity becomes 0.5M .Volume of water added to solution is

What is the relationship between molality,molarity and density of a solution?

Assuming the water vapour is an ideal gas, the internal energy change (ΔU) in kJ when 1 mole of water is vapourised at 177∘C. (Given molar enthalpy of vapourisation of water 177∘C = 37 kJ/mol and R=253 J/molK)

The C−C bond length is maximum in

Order of decreasing acidity of (i) HCOOH (ii)CH3COOH (iii)Cl2CHCOOH (iv)CF3COOH is

Reaction Involving cyclic interme/H2Odiate and anti-addition is(1) CH2=CH2\xrightarrow[{}]{H+/H2O}(2) CH3CH=CH2\xrightarrow[{}]{HX}(3) CH3CH=CH2\xrightarrow[{NaBH4}]{Hg(OAc)2/H2O}(4) CH2=CH2\xrightarrow[{H2O2/OH}]{B2H6/THF

In which of the following is the removal of Cl− most difficult?

which of the following molecule exhibits conformational isomerism:- (1) CH4 (2)CF4 (3) CH3OH (4) CH2O

49 g of sulphuric acid are dissolved in 250 ml of the solution. Its molarity will be

for the equilibrium S02Cl2=SO2+Cl2 what is the temperature at which Kp(atm)/Kc(M)=3 1.0.027K 2.0.36K 3.36.54K 4.273K

The total number of geometrical isomers possible for following compound is:

26.The molecular mass of O2 and SO2 are 32 and 64 respectively.If one litre of O2 at at 15 degree ceisius and 750mm pressure contains N molecules, the number of molecules in two litres of S02 under the same conditions of temperature and pressure will be A N/2 B 4N C N D 2N

In an atom, an electron is moving with a speed of 600 m sec−1 with an accuracy of 0.005%. Certainty with which the position of the electron can be located is

The maximum amount of magnesium oxide formedwhen 16 g of Mg is burnt with 16 g of O2 in a closedvessel is(1) 26.67 g(3) 32 g40 g(4) 24.67 g

Among the following, the molecule with the highest dipole moment is:

De broglie equation derivation ?

Carbyl amine test is performed in alcoholic KOH by heating a mixture of

38.Comparison between thermal resistivity and electrical resistivity

Iron(II)oxide crystallise in cubic structure with unit cell edge length of 5 A∘. If the density of oxide is 3.8 g cm−3. Calculate the number of Fe2+ ions present in each unit cell.[ Molar mass of Fe=56 g/mol ]

A constant current (0.5 amp) is passed for 1 hour through (i) aqueous AgNO3, (ii) aqueous CuSO4 and (iii) molten AlF3, separately. The ratio of the mass of the metals deposited on the cathode is: [MAg, MCu, MAl are molar masses of the respective metals]

why is writing considered as no work done?

NH3 dissociates completely with HCl to form NH4+ and Cl-But why doesnt NH3 dissociate completely in H2O to for NH4+ and OH-?

which of the following bonds had highest bond energy1.H-H Bond in H22.C-C bond in C2H63.N-N bond N2H44.O-O bond in H2O2

Compare dipole moment of h2s and so2

The emf of a cell corresponding to the reaction Zn(s) + 2H+(aq)→Zn2+(0.1 M) + H2(g, 1 bar) is 0.28 V at 25∘ C. Calculate the pH of the solution at the hydrogen electrode. Given E∘Zn2+|Zn=−0.763 V

one mole of an ideal gas at 25° celsius expands in volume from 1.0 l to 4.0 l at constant temperature what work in joule is done if the gas expands against vacuum (p external= 0)?

Na_2CO_3+H_2O+CO_2→(A) white ceystalline powder (A) on reaction with phenolphthalein gives which colo

The value of critical temperature in terms of Vander Wall's constants a&b is given

Hybridisation of [ScF6]3-

47. What should be the order of energy of 2s electron for H,Li,Na,K, and why?

The compound which is not sp3 hybridisation (1)[Ni(CO)], { (2) \lbrack Cu(NH_3)_4\rbrack{ (3) \lbrack NiCl_4\rbrack^{2-{ (4) \lbrack Zn(NH_3)_4\rbrack^{2+

Which of the following ligands is/are π acceptor(s)?

The value of equilibrium cons†an t for self-ionization of water is - 1)55.5×10^{-18} 2)5.55×10^{-18} 3)3.25×10^{-18} 4)1×10^{-1