46295 + Interview Questions in Chemistry

1.	Given is the Bayer’s process of seperation of aluminum.Al2O3(s)+2NaOH→2A+H2OA+2H2O→Al(OH)3+NaOHAl(OH)3Heat−−−−→1000 oCB+3H2OWhich of the following is a correct pair?
Answer» Given is the Bayer’s process of seperation of aluminum. $A l_{2} O_{3} (s) + 2 N a O H \to 2 A + H_{2} O A + 2 H_{2} O \to A l (O H)_{3} + N a O H A l (O H)_{3} H e a t - --- \to 1000^{o} C B + 3 H_{2} O$ Which of the following is a correct pair?

Discussion

2.	The carboxylate ion formed due to the deprotonation of the above compound will be most stable, if X is:
Answer» The carboxylate ion formed due to the deprotonation of the above compound will be most stable, if X is:

Discussion

3.	what is isomorphus
Answer» what is isomorphus

Discussion

4.	We know the energy needed to move from one shell to another is given by del.E =E.2 - E.1 .and this is the ionization or separation energy also.Do the above difference is done between infinte energy shell and the given shell or between two consecutive energy shells.?
Answer» We know the energy needed to move from one shell to another is given by del.E =E.2 - E.1 . and this is the ionization or separation energy also. Do the above difference is done between infinte energy shell and the given shell or between two consecutive energy shells.?

Discussion

5.	23 With increasing concentration below 0.04 M of alkali metals in liquid ammonia conductivity of solution increases or decreases?
Answer» 23 With increasing concentration below 0.04 M of alkali metals in liquid ammonia conductivity of solution increases or decreases?

Discussion

6.	Calculate the value of ebullioscopic constant of a solvent if enthalpy of vapourisation of that solvent is nearly 3974 cal mol−1.Given :Boiling point of pure solvent is 127∘CMolecular mass of the solvent is 20 g mol−1
Answer» Calculate the value of ebullioscopic constant of a solvent if enthalpy of vapourisation of that solvent is nearly $3974 c a l m o l^{- 1}$ . Given : Boiling point of pure solvent is $127^{\circ} C$ Molecular mass of the solvent is $20 g m o l^{- 1}$

Discussion

7.	The predominant form of histamine present in human blood is:(pKa=6.0)
Answer» The predominant form of histamine present in human blood is: $(p K a = 6.0)$

Discussion

8.	Name the factors which affect chemical equilibrium.
Answer» Name the factors which affect chemical equilibrium.

Discussion

9.	Is Maltase a shape selective catalyst?
Answer» Is Maltase a shape selective catalyst?

Discussion

10.	For any value of alkyl group (R), the correct order of basic character of the 1o,2o,3o amines and NH3 in gaseous phase of non polar solvent is:
Answer» For any value of alkyl group (R), the correct order of basic character of the $1^{o}, 2^{o}, 3^{o}$ amines and $N H_{3}$ in gaseous phase of non polar solvent is:

Discussion

11.	Write main diference between the properties of white phosphrous and red phosphrous.
Answer» Write main diference between the properties of white phosphrous and red phosphrous.

Discussion

12.	What are polyatomic ions?
Answer» What are polyatomic ions?

Discussion

13.	(69. Calculate pH of solution obtained by mixing50 ml 0.2 M NH,CI solution and 75 ml. 0.1 MNaOH solution. pK, for aqueous NHis 4.74 :-(1) 4.26 (2) 5.22 (3) 8.78 (4) 9.74
Answer» (69. Calculate pH of solution obtained by mixing50 ml 0.2 M NH,CI solution and 75 ml. 0.1 MNaOH solution. pK, for aqueous NHis 4.74 :-(1) 4.26 (2) 5.22 (3) 8.78 (4) 9.74

Discussion

14.	An alkene on ozonolysis gives methanal as one of the product. Its structure is:
Answer» An alkene on ozonolysis gives methanal as one of the product. Its structure is:

Discussion

15.	Which of the following d orbitals is not used in bonding to form H2SO4 ?
Answer» Which of the following d orbitals is not used in bonding to form $H_{2} S O_{4}$ ?

Discussion

16.	For the reaction CO(g)+H2O(g)⇌CO2(g)+H2(g) at a given temperature, the equilibrium amount of CO2(g) can be increased by
Answer» For the reaction $C O (g) + H_{2} O (g) ⇌ C O_{2} (g) + H_{2} (g)$ at a given temperature, the equilibrium amount of $C O_{2} (g)$ can be increased by

Discussion

17.	The molar conductivity of a 0.5 mol/dm^3 solution of AgNO3 with electrolytic conductivity of 5.76 ×10^{ -3} Scm^{-1 } at 298K is
Answer» The molar conductivity of a 0.5 mol/dm^3 solution of AgNO3 with electrolytic conductivity of 5.76 ×10^{ -3} Scm^{-1 } at 298K is

Discussion

18.	11. Which has maximum molal depression constants? 1) 0.1M aq KCl 2)0.1M aq sodium sulphate 3)0.2M aq barium phosphate 4)same for all
Answer» 11. Which has maximum molal depression constants? 1) 0.1M aq KCl 2)0.1M aq sodium sulphate 3)0.2M aq barium phosphate 4)same for all

Discussion

19.	What is Kc for the following equilibrium when the equilibrium concentration of each substance is: [SO2]= 0.60 M, [O2] = 0.82 M and [SO3] = 1.90 M ? 2SO2 (g) + O2 (g) ⇌ 2SO3 (g)
Answer» What is K_c for the following equilibrium when the equilibrium concentration of each substance is: [SO₂]= 0.60 M, [O₂] = 0.82 M and [SO₃] = 1.90 M ? 2SO₂ (g) + O₂ (g) ⇌ 2SO₃ (g)

19.

What is Kc for the following equilibrium when the equilibrium concentration of each substance is: [SO2]= 0.60 M, [O2] = 0.82 M and [SO3] = 1.90 M ? 2SO2 (g) + O2 (g) ⇌ 2SO3 (g)

Answer»

What is K_c for the following equilibrium when the equilibrium concentration of each substance is: [SO₂]= 0.60 M, [O₂] = 0.82 M and [SO₃] = 1.90 M ?

2SO₂ (g) + O₂ (g) ⇌ 2SO₃ (g)

Discussion

20.	the vapour pressure of pure water is 760mm at 25^{}C .the vapour pressure of solution containing 1(m) solution
Answer» the vapour pressure of pure water is 760mm at 25^{}C .the vapour pressure of solution containing 1(m) solution

Discussion

21.	Vapour pressure of pure A, (p∘A)=100 mm HgVaour pressure of pure B, (p∘B)=150 mm Hg2 mol of liquid 'A' and 3 mol of liquid 'B' are mixed to form an ideal solution. The vapour pressure of solution will be :
Answer» $Vapour pressure of pure A, (p_{A}^{\circ}) = 100 m m H g$ $Vaour pressure of pure B, (p_{B}^{\circ}) = 150 m m H g$ 2 mol of liquid 'A' and 3 mol of liquid 'B' are mixed to form an ideal solution. The vapour pressure of solution will be :

Discussion

22.	Which of the following compounds does not evolve a colored gas on decomposition?
Answer» Which of the following compounds does not evolve a colored gas on decomposition?

Discussion

23.	Calculate ΔfHoin kJ (magnitude only) for chloride ion (in aq.) from the following data: 12H2(g)+12Cl2(g)→HCl(g); ΔfHo=−92.4 kJHCl(g)+H2O(l)→H3O++(aq)+Cl−(aq); ΔHo=−74.8 kJΔfHoof H+(aq)=0.0 kJ
Answer» Calculate $Δ_{f} H^{o} in kJ$ (magnitude only) for chloride ion (in aq.) from the following data: $\frac{1}{2} H_{2} (g) + \frac{1}{2} C l_{2} (g) \to H C l (g); Δ_{f} H^{o} = - 92.4 kJ H C l (g) + H_{2} O (l) \to H_{3} O^{+} + (a q) + C l^{-} (a q); Δ H^{o} = - 74.8 kJ$ $Δ_{f} H^{o} of H^{+} (a q) = 0.0 kJ$

Discussion

24.	What will be the product formed when 2methyl cyclopen†an one is treated with CH2N2? 1)2methyl cyclopen†an one 2)Cyclohexanone 3)2methyl cyclohexanone 4)3methyl cyclohexanon
Answer» What will be the product formed when 2methyl cyclopen†an one is treated with CH2N2? 1)2methyl cyclopen†an one 2)Cyclohexanone 3)2methyl cyclohexanone 4)3methyl cyclohexanon

Discussion

25.	The following solutions were prepared by dissolving 10 g of glucose (C6H12O6) in 250 ml of water (P1), 10 g of urea (CH4N2O) in 250 ml of water (P2) and 10 g of sucrose (C12H22O11) in 250 ml of water (P3). The right option for the decreasing order of osmotic pressure of these solutions is :
Answer» The following solutions were prepared by dissolving $10 g$ of glucose $(C_{6} H_{12} O_{6})$ in $250 m l$ of water $(P_{1})$ , $10 g$ of urea $(C H_{4} N_{2} O)$ in $250 m l$ of water $(P_{2})$ and $10 g$ of sucrose $(C_{12} H_{22} O_{11})$ in $250 m l$ of water $(P_{3})$ . The right option for the decreasing order of osmotic pressure of these solutions is :

Discussion

26.	how many octahedral voids are completely inside in hcp?
Answer» how many octahedral voids are completely inside in hcp?

Discussion

27.	The vapour density of equilibrium mixture for N2O4(g)⇌2NO2(g) is 28.75 at 1 atm. This mixture is allowed to diffuse out for 10 seconds. Calculate the Kp of the reaction after 10 seconds.
Answer» The vapour density of equilibrium mixture for $N_{2} O_{4} (g) ⇌ 2 N O_{2} (g)$ is 28.75 at 1 atm. This mixture is allowed to diffuse out for 10 seconds. Calculate the $K_{p}$ of the reaction after 10 seconds.

Discussion

28.	in quater of circle the displacement will be ?
Answer» in quater of circle the displacement will be ?

Discussion

29.	45. what is denticity of DMG ligand 1-1 2-2 3-4 4-6
Answer» 45. what is denticity of DMG ligand 1-1 2-2 3-4 4-6

Discussion

30.	20. No. Of alkenes formed when pentan-2-ol is heated in presence of H+ ions ?
Answer» 20. No. Of alkenes formed when pentan-2-ol is heated in presence of H+ ions ?

Discussion

31.	Choose the correct option of a fat soluble vitamin from the following:
Answer» Choose the correct option of a fat soluble vitamin from the following:

Discussion

32.	Is all compounds are ions?
Answer» Is all compounds are ions?

Discussion

33.	3.Number of atoms in 100g of a bcc crystal lattice with density equal to 10 gram per cc and its edge length equal to 200 picometre?
Answer» 3.Number of atoms in 100g of a bcc crystal lattice with density equal to 10 gram per cc and its edge length equal to 200 picometre?

Discussion

34.	When 262 g of xenon (atomic mass = 131) reacted completely with 152 g of fluorine (atomic mass = 19), a mixture of XeF2 and XeF6 was produced. The molar ratio XeF2 : XeF6 is :
Answer» When 262 g of xenon (atomic mass = 131) reacted completely with 152 g of fluorine (atomic mass = 19), a mixture of XeF $_{2}$ and XeF $_{6}$ was produced. The molar ratio XeF $_{2}$ : XeF $_{6}$ is :

Discussion

35.	why so4^2 does not oxidize
Answer» why so4^2 does not oxidize

Discussion

36.	If for a hydrogen electrode, Pt,H2 (g,1atm)/H+ E of cell=0.3volt,then the PH at which this potential is achieved?
Answer» If for a hydrogen electrode, Pt,H2 (g,1atm)/H+ E of cell=0.3volt,then the PH at which this potential is achieved?

Discussion

37.	meaning of isotrophy of space?
Answer» meaning of isotrophy of space?

Discussion

38.	The correct order of boiling ponts of the following aminesC4H9NH2,(C2H5)2NH,C2H5N(CH3)2 is:
Answer» The correct order of boiling ponts of the following amines $C_{4} H_{9} N H_{2}, (C_{2} H_{5})_{2} N H, C_{2} H_{5} N (C H_{3})_{2}$ is:

Discussion

39.	Among the following which species has same number of σ and π bonds.
Answer» Among the following which species has same number of $σ$ and $π$ bonds.

Discussion

40.	The reagent used for testing ammonia is:
Answer» The reagent used for testing ammonia is:

Discussion

41.	Hawroth structure of β - D (+) glucose is?
Answer» Hawroth structure of β - D (+) glucose is?

Discussion

42.	6) G (kJ/mol) values at 298 K for Ag+ (aq), Cl-(aq) and AgCI (s) are 77,-129 and -109 respectively for the given reaction, Ag (aq) + C (aq) AgCI(s) Then the solubility product of AgCl is
Answer» 6) G (kJ/mol) values at 298 K for Ag+ (aq), Cl-(aq) and AgCI (s) are 77,-129 and -109 respectively for the given reaction, Ag (aq) + C (aq) AgCI(s) Then the solubility product of AgCl is

Discussion

43.	32. How to calculate bond order and bond length in CN, CO , NH3+
Answer» 32. How to calculate bond order and bond length in CN, CO , NH3+

Discussion

44.	Which of the following is not the characteristic of ionic solids ? (a) Very low value of electrical conductivity in the molten state (b) Brittle nature (c) Very strong forces of interactions (d) Anisotropic nature
Answer» Which of the following is not the characteristic of ionic solids ? (a) Very low value of electrical conductivity in the molten state (b) Brittle nature (c) Very strong forces of interactions (d) Anisotropic nature

44.

Which of the following is not the characteristic of ionic solids ? (a) Very low value of electrical conductivity in the molten state (b) Brittle nature (c) Very strong forces of interactions (d) Anisotropic nature

Answer»

Which of the following is not the characteristic of ionic solids ?

(a) Very low value of electrical conductivity in the molten state

(b) Brittle nature

(c) Very strong forces of interactions

(d) Anisotropic nature

Discussion

45.	When 6.81 L of a gas mixture of methane and propane is perfectly combusted at 0 ∘C and 1 bar, 15.89 L of oxygen at the same temperature and pressure is consumed. The amount of heat released from this combustion in kJ is:(ΔHcomb(CH4)=890 kJ mol−1, ΔHcomb(C3H8)=2220 kJ mol−1)
Answer» When $6.81 L$ of a gas mixture of methane and propane is perfectly combusted at $0^{\circ} C$ and $1$ bar, $15.89 L$ of oxygen at the same temperature and pressure is consumed. The amount of heat released from this combustion in $kJ is : (Δ H_{comb} (C H_{4}) = 890 {kJ mol}^{- 1}, Δ H_{comb} (C_{3} H_{8}) = 2220 {kJ mol}^{- 1})$

Discussion

46.	7 Iron in nature exists in three isotopic forms:Fe54, Fe56, Fe57. The percentage abundanceof Fe54 and Fe57 are equal and the averageatomic mass of Fe is 55.95 then percentageabundance of Fe56 is(1) 80%(3) 90%,(2) , 85%(4) 95%
Answer» 7 Iron in nature exists in three isotopic forms:Fe54, Fe56, Fe57. The percentage abundanceof Fe54 and Fe57 are equal and the averageatomic mass of Fe is 55.95 then percentageabundance of Fe56 is(1) 80%(3) 90%,(2) , 85%(4) 95%

Discussion

47.	order of deviation from ideal gas behaviour 1)H2(g) 2)N2(g) 3)CH4(g) 4)NH3(g)
Answer» order of deviation from ideal gas behaviour 1)H2(g) 2)N2(g) 3)CH4(g) 4)NH3(g)

Discussion

48.	Q 10/60 Sodium crystallizes in a face centred cubic lattice. Theapproximate number of unit cells in 5.0 g of sodium is (Atomic massof sodium 23 u)
Answer» Q 10/60 Sodium crystallizes in a face centred cubic lattice. Theapproximate number of unit cells in 5.0 g of sodium is (Atomic massof sodium 23 u)

Discussion

49.	Lithium metal has body centred cubic structure its density is 0.53g/cm and its molar mass is 6.94g/mol calculate edge length of a unit cell of lithium metal
Answer» Lithium metal has body centred cubic structure its density is 0.53g/cm and its molar mass is 6.94g/mol calculate edge length of a unit cell of lithium metal

Discussion

50.	Which one of the following class of compounds is obtained by polymerization of acetylene?
Answer» Which one of the following class of compounds is obtained by polymerization of acetylene?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Given is the Bayer’s process of seperation of aluminum.Al2O3(s)+2NaOH→2A+H2OA+2H2O→Al(OH)3+NaOHAl(OH)3Heat−−−−→1000 oCB+3H2OWhich of the following is a correct pair?

The carboxylate ion formed due to the deprotonation of the above compound will be most stable, if X is:

what is isomorphus

We know the energy needed to move from one shell to another is given by del.E =E.2 - E.1 .and this is the ionization or separation energy also.Do the above difference is done between infinte energy shell and the given shell or between two consecutive energy shells.?

23 With increasing concentration below 0.04 M of alkali metals in liquid ammonia conductivity of solution increases or decreases?

Calculate the value of ebullioscopic constant of a solvent if enthalpy of vapourisation of that solvent is nearly 3974 cal mol−1.Given :Boiling point of pure solvent is 127∘CMolecular mass of the solvent is 20 g mol−1

The predominant form of histamine present in human blood is:(pKa=6.0)

Name the factors which affect chemical equilibrium.

Is Maltase a shape selective catalyst?

For any value of alkyl group (R), the correct order of basic character of the 1o,2o,3o amines and NH3 in gaseous phase of non polar solvent is:

Write main diference between the properties of white phosphrous and red phosphrous.

What are polyatomic ions?

(69. Calculate pH of solution obtained by mixing50 ml 0.2 M NH,CI solution and 75 ml. 0.1 MNaOH solution. pK, for aqueous NHis 4.74 :-(1) 4.26 (2) 5.22 (3) 8.78 (4) 9.74

An alkene on ozonolysis gives methanal as one of the product. Its structure is:

Which of the following d orbitals is not used in bonding to form H2SO4 ?

For the reaction CO(g)+H2O(g)⇌CO2(g)+H2(g) at a given temperature, the equilibrium amount of CO2(g) can be increased by

The molar conductivity of a 0.5 mol/dm^3 solution of AgNO3 with electrolytic conductivity of 5.76 ×10^{ -3} Scm^{-1 } at 298K is

11. Which has maximum molal depression constants? 1) 0.1M aq KCl 2)0.1M aq sodium sulphate 3)0.2M aq barium phosphate 4)same for all

What is Kc for the following equilibrium when the equilibrium concentration of each substance is: [SO2]= 0.60 M, [O2] = 0.82 M and [SO3] = 1.90 M ? 2SO2 (g) + O2 (g) ⇌ 2SO3 (g)

the vapour pressure of pure water is 760mm at 25^{}C .the vapour pressure of solution containing 1(m) solution

Vapour pressure of pure A, (p∘A)=100 mm HgVaour pressure of pure B, (p∘B)=150 mm Hg2 mol of liquid 'A' and 3 mol of liquid 'B' are mixed to form an ideal solution. The vapour pressure of solution will be :

Which of the following compounds does not evolve a colored gas on decomposition?

Calculate ΔfHoin kJ (magnitude only) for chloride ion (in aq.) from the following data: 12H2(g)+12Cl2(g)→HCl(g); ΔfHo=−92.4 kJHCl(g)+H2O(l)→H3O++(aq)+Cl−(aq); ΔHo=−74.8 kJΔfHoof H+(aq)=0.0 kJ

What will be the product formed when 2methyl cyclopen†an one is treated with CH2N2? 1)2methyl cyclopen†an one 2)Cyclohexanone 3)2methyl cyclohexanone 4)3methyl cyclohexanon

The following solutions were prepared by dissolving 10 g of glucose (C6H12O6) in 250 ml of water (P1), 10 g of urea (CH4N2O) in 250 ml of water (P2) and 10 g of sucrose (C12H22O11) in 250 ml of water (P3). The right option for the decreasing order of osmotic pressure of these solutions is :

how many octahedral voids are completely inside in hcp?

The vapour density of equilibrium mixture for N2O4(g)⇌2NO2(g) is 28.75 at 1 atm. This mixture is allowed to diffuse out for 10 seconds. Calculate the Kp of the reaction after 10 seconds.

in quater of circle the displacement will be ?

45. what is denticity of DMG ligand 1-1 2-2 3-4 4-6

20. No. Of alkenes formed when pentan-2-ol is heated in presence of H+ ions ?

Choose the correct option of a fat soluble vitamin from the following:

Is all compounds are ions?

3.Number of atoms in 100g of a bcc crystal lattice with density equal to 10 gram per cc and its edge length equal to 200 picometre?

When 262 g of xenon (atomic mass = 131) reacted completely with 152 g of fluorine (atomic mass = 19), a mixture of XeF2 and XeF6 was produced. The molar ratio XeF2 : XeF6 is :

why so4^2 does not oxidize

If for a hydrogen electrode, Pt,H2 (g,1atm)/H+ E of cell=0.3volt,then the PH at which this potential is achieved?

meaning of isotrophy of space?

The correct order of boiling ponts of the following aminesC4H9NH2,(C2H5)2NH,C2H5N(CH3)2 is:

Among the following which species has same number of σ and π bonds.

The reagent used for testing ammonia is:

Hawroth structure of β - D (+) glucose is?

6) G (kJ/mol) values at 298 K for Ag+ (aq), Cl-(aq) and AgCI (s) are 77,-129 and -109 respectively for the given reaction, Ag (aq) + C (aq) AgCI(s) Then the solubility product of AgCl is

32. How to calculate bond order and bond length in CN, CO , NH3+

Which of the following is not the characteristic of ionic solids ? (a) Very low value of electrical conductivity in the molten state (b) Brittle nature (c) Very strong forces of interactions (d) Anisotropic nature

When 6.81 L of a gas mixture of methane and propane is perfectly combusted at 0 ∘C and 1 bar, 15.89 L of oxygen at the same temperature and pressure is consumed. The amount of heat released from this combustion in kJ is:(ΔHcomb(CH4)=890 kJ mol−1, ΔHcomb(C3H8)=2220 kJ mol−1)

7 Iron in nature exists in three isotopic forms:Fe54, Fe56, Fe57. The percentage abundanceof Fe54 and Fe57 are equal and the averageatomic mass of Fe is 55.95 then percentageabundance of Fe56 is(1) 80%(3) 90%,(2) , 85%(4) 95%

order of deviation from ideal gas behaviour 1)H2(g) 2)N2(g) 3)CH4(g) 4)NH3(g)

Q 10/60 Sodium crystallizes in a face centred cubic lattice. Theapproximate number of unit cells in 5.0 g of sodium is (Atomic massof sodium 23 u)

Lithium metal has body centred cubic structure its density is 0.53g/cm and its molar mass is 6.94g/mol calculate edge length of a unit cell of lithium metal

Which one of the following class of compounds is obtained by polymerization of acetylene?