46295 + Interview Questions in Chemistry

1.	Why there is no loss of exchange energy at d6 configuration? And if it is because the atoms are in ion form and thus they are present in aqueous medium (h2o) then also h20 is weak field ligand so electrons can't pair In it then why there is no loss of exchange energy in d6?
Answer» Why there is no loss of exchange energy at d6 configuration? And if it is because the atoms are in ion form and thus they are present in aqueous medium (h2o) then also h20 is weak field ligand so electrons can't pair In it then why there is no loss of exchange energy in d6?

Discussion

2.	39. Which one of the following sets of compounds correctly illustrate the law of reciprocal propotion a) P2O3, PH3, H2O b) N2O5, NH3, H2O c)NO2, NH3, H2O d) P2O5, PH3, H2O e) N2O, NH3, H2O
Answer» 39. Which one of the following sets of compounds correctly illustrate the law of reciprocal propotion a) P2O3, PH3, H2O b) N2O5, NH3, H2O c)NO2, NH3, H2O d) P2O5, PH3, H2O e) N2O, NH3, H2O

Discussion

3.	Plot the graph:-Kinetic energy of ejected photoelectrons(in Photoelectric Effect) versus the intensity of incident light.
Answer» Plot the graph:- Kinetic energy of ejected photoelectrons(in Photoelectric Effect) versus the intensity of incident light.

Discussion

4.	What is meant degenerate orbitals? How to calculate them? What is meant by four fold degeneracy, how to calculate that?
Answer» What is meant degenerate orbitals? How to calculate them? What is meant by four fold degeneracy, how to calculate that?

Discussion

5.	Which of the following is also referred to as ‘Marshall’s acid’?
Answer» Which of the following is also referred to as ‘Marshall’s acid’?

Discussion

6.	The type of reaction that gives constant half life is
Answer» The type of reaction that gives constant half life is

Discussion

7.	0.157 g of a certain gas collected over water occupied a volume of 135 ml at 270 C and 750 mm of Hg. Assuming ideal behaviour, the molecular weight of the gas is (aqueous tension at 270 C is 26.7 mm of Hg)
Answer» 0.157 g of a certain gas collected over water occupied a volume of 135 ml at $27^{0} C$ and 750 mm of Hg. Assuming ideal behaviour, the molecular weight of the gas is (aqueous tension at $27^{0} C$ is 26.7 mm of Hg)

Discussion

8.	Total number of anti-aromatic compund is .
Answer» Total number of anti-aromatic compund is .

Discussion

9.	How to detect whether a substituent group attached to benzene ring is in the same plane of benzenze ring or not?
Answer» How to detect whether a substituent group attached to benzene ring is in the same plane of benzenze ring or not?

Discussion

10.	The number of unpaired electrons in O, molecule is(1) Zero(2) 1(3) 2(4) 3
Answer» The number of unpaired electrons in O, molecule is(1) Zero(2) 1(3) 2(4) 3

Discussion

11.	1-Chloro-pent-1,3-diene will have X number of geometrical isomers. The the value of X is
Answer» 1-Chloro-pent-1,3-diene will have X number of geometrical isomers. The the value of X is

Discussion

12.	If Zn2+ ions lying on one of the body diagonals ofZnS (sphalerite) unit cell are removed, the ratio ofcation and anion would become (1) 4:3 (2) 3:4 (4) 8:7(3) 7:8
Answer» If Zn2+ ions lying on one of the body diagonals ofZnS (sphalerite) unit cell are removed, the ratio ofcation and anion would become (1) 4:3 (2) 3:4 (4) 8:7(3) 7:8

Discussion

13.	How to convert benzo trichloride to benzoic acid
Answer» How to convert benzo trichloride to benzoic acid

Discussion

14.	When MnO2 is fused with KOH, a coloured compound is formed. The product and its colour is
Answer» When $M n O_{2}$ is fused with KOH, a coloured compound is formed. The product and its colour is

Discussion

15.	28. a 0.075molar solution of monobasic acid has a freezing ppint of -0.18celcius calculate ka for the acid.
Answer» 28. a 0.075molar solution of monobasic acid has a freezing ppint of -0.18celcius calculate ka for the acid.

Discussion

16.	s all P-F bond in PF5 and S-F bond in SF5 are equal
Answer» s all P-F bond in PF5 and S-F bond in SF5 are equal

Discussion

17.	46 The strongest P-O bond is present in a. F3PO b. Cl3PO c. Br3PO d. (CH3)3PO
Answer» 46 The strongest P-O bond is present in a. F3PO b. Cl3PO c. Br3PO d. (CH3)3PO

Discussion

18.	how to find reaction order in coupling reactions??
Answer» how to find reaction order in coupling reactions??

Discussion

19.	Temperature of a 5 mole of hydrogen gas decreases by 260 K while expanded through adiabatic process. Find the work done by the gas. What is the change in internal energy of the gas?
Answer» Temperature of a 5 mole of hydrogen gas decreases by 260 K while expanded through adiabatic process. Find the work done by the gas. What is the change in internal energy of the gas?

Discussion

20.	Which one of the following is wrong?
Answer» Which one of the following is wrong?

Discussion

21.	Write the monomers used for getting the following polymers. (i) Polyvinyl chloride (ii) Teflon (iii) Bakelite
Answer» Write the monomers used for getting the following polymers. (i) Polyvinyl chloride (ii) Teflon (iii) Bakelite

21.

Write the monomers used for getting the following polymers. (i) Polyvinyl chloride (ii) Teflon (iii) Bakelite

Answer»

Write the monomers used
for getting the following polymers.

(i) Polyvinyl
chloride (ii) Teflon (iii) Bakelite

Discussion

22.	Which of the following compound(s) will show plane of symmetry
Answer» Which of the following compound(s) will show plane of symmetry

Discussion

23.	If A is a unit matrix of order n, then A (adj A) = ___________________.
Answer» If A is a unit matrix of order n, then A (adj A) = ___________________.

Discussion

24.	the ratio of coefficient of co2 to fec204 in the balanced reaction is :- kmno4 + fec2o4 + h2so4 --> k2so4 + mnso4 + co2 + h20 + fe2(so4)3. kindly explain with the help of steps.
Answer» the ratio of coefficient of co2 to fec204 in the balanced reaction is :- kmno4 + fec2o4 + h2so4 --> k2so4 + mnso4 + co2 + h20 + fe2(so4)3. kindly explain with the help of steps.

Discussion

25.	The volume strength of solution formed by mixing 1L of 0.5M H2O2 with 2L 0.5 M H2O2 is
Answer» The volume strength of solution formed by mixing 1L of 0.5M $H_{2}$ $O_{2}$ with 2L 0.5 M $H_{2}$ $O_{2}$ is

Discussion

26.	Non-stoichiometric cuprous oxide, Cu2O can be prepared in laboratory. In this oxide, copper to oxygen ratio is slightly less than 2:1. Can you account for the fact that this substance is a p-type semiconductor?
Answer» Non-stoichiometric cuprous oxide, Cu₂O can be prepared in laboratory. In this oxide, copper to oxygen ratio is slightly less than 2:1. Can you account for the fact that this substance is a p-type semiconductor?

Discussion

27.	The freezing point of a solution containing 0.2 g of acetic acid in 20 g of benzene is lowered by 0.45∘C.. Choose the correct option(s) :Given :(Kf)Benzene=5.12 K kg mol−1
Answer» The freezing point of a solution containing $0.2 g$ of acetic acid in $20 g$ of benzene is lowered by ${0.45}^{\circ} C .$ . Choose the correct option(s) : Given : $(K_{f})_{Benzene} = 5.12 K k g m o l^{- 1}$

Discussion

28.	The value of A and Z in the following nuclear reaction is2512Mg+42He→11H+AZX
Answer» The value of $A$ and $Z$ in the following nuclear reaction is $_{12}^{25} Mg +_{2}^{4} He \to_{1}^{1} H +_{Z}^{A} X$

Discussion

29.	Ionization Enthalpy
Answer» Ionization Enthalpy

Discussion

30.	2.5 g of a monobasic acid when dissolved in 100 g of water elevates the boiling point of the solution by 0.256∘C. If 0.5 g of the acid requires 8 milliequivalents of NaOH for complete neutralisation, then the degree of dissociation of the acid is: [Kb of water =0.512Kkgmol−1]
Answer» 2.5 g of a monobasic acid when dissolved in 100 g of water elevates the boiling point of the solution by ${0.256}^{\circ} C$ . If 0.5 g of the acid requires 8 milliequivalents of NaOH for complete neutralisation, then the degree of dissociation of the acid is: [ $K_{b}$ of water $= 0.512 K k g m o l^{- 1}$ ]

Discussion

31.	Blue solution of CuSO4 becomes darker when treated with ammonia because
Answer» Blue solution of CuSO₄becomes darker when treated with ammonia because

Discussion

32.	PA and PB are the vapour pressures of pure liquid components, A and B, respectively of an ideal binary solution. If xA represents the mole fraction of component A, the total pressure of the solution will be:[1 mark]
Answer» $P_{A}$ and $P_{B}$ are the vapour pressures of pure liquid components, $A$ and $B$ , respectively of an ideal binary solution. If $x_{A}$ represents the mole fraction of component $A$ , the total pressure of the solution will be: [1 mark]

Discussion

33.	Predictthe products of electrolysis in each of the following:(i) An aqueous solution of AgNO3with silver electrodes.(ii) An aqueous solution of AgNO3withplatinum electrodes.(iii) A dilute solution of H2SO4withplatinum electrodes.(iv) An aqueous solution of CuCl2with platinum electrodes.
Answer» Predict the products of electrolysis in each of the following: (i) An aqueous solution of AgNO₃ with silver electrodes. (ii) An aqueous solution of AgNO₃with platinum electrodes. (iii) A dilute solution of H₂SO₄with platinum electrodes. (iv) An aqueous solution of CuCl₂ with platinum electrodes.

33.

Predictthe products of electrolysis in each of the following:(i) An aqueous solution of AgNO3with silver electrodes.(ii) An aqueous solution of AgNO3withplatinum electrodes.(iii) A dilute solution of H2SO4withplatinum electrodes.(iv) An aqueous solution of CuCl2with platinum electrodes.

Answer»

Predict
the products of electrolysis in each of the following:

(i)
An aqueous solution of AgNO₃
with silver electrodes.

(ii)
An aqueous solution of AgNO₃with
platinum electrodes.

(iii)
A dilute solution of H₂SO₄with
platinum electrodes.

(iv)
An aqueous solution of CuCl₂
with platinum electrodes.

Discussion

34.	calculate mass of urea required in making 2.5 kg of 0.25 molal aqueous solution ?
Answer» calculate mass of urea required in making 2.5 kg of 0.25 molal aqueous solution ?

Discussion

35.	The △H and △S for a reaction at one atmospheric pressure are +30.558 kJ and 0.066 k J k−1 respectively. The temperature at which the free energy change will be zero and below of this temperature the nature of reaction would be
Answer» The $△ H$ and $△ S$ for a reaction at one atmospheric pressure are +30.558 kJ and 0.066 k J $k^{- 1}$ respectively. The temperature at which the free energy change will be zero and below of this temperature the nature of reaction would be

Discussion

36.	How to learn the structure of pyridine,firon,purane etc
Answer» How to learn the structure of pyridine,firon,purane etc

Discussion

37.	In iodometric titrations, an oxidizing agent such as KMnO4,K2Cr2O7,CuSO4,H2O2 is allowed to react in neutral medium or in acidic medium with excess of potassium iodide to liberate free iodine (I2).Free iodine is titrated against standard reducing agent usually with sodium thiosulphate. The reactions are as follows:K2Cr2O7+6KI+7H2SO4→Cr2(SO4)3+4K2SO4+7H2O+I22CuCO4+4KI→Cu2I2+2K2SO4+I2I2+Na2S2O3→2NaI+Na2S4O6In iodometric titrations, starch solution is used as an indicator. Starch solution gives blue or violet colour with free iodine. At the end point, blue or voilet colour disappears when iodine is completely changed to iodide.What volume of 0.40 M Na2S2O3 would be required (in mL) to react with I2 liberated by adding 0.04 mole of KI to 50 mL of 0.20 M CuSO4 solution?
Answer» In iodometric titrations, an oxidizing agent such as $K M n O_{4}, K_{2} C r_{2} O_{7}, C u S O_{4}, H_{2} O_{2}$ is allowed to react in neutral medium or in acidic medium with excess of potassium iodide to liberate free iodine $(I_{2})$ . Free iodine is titrated against standard reducing agent usually with sodium thiosulphate. The reactions are as follows: $K_{2} C r_{2} O_{7} + 6 K I + 7 H_{2} S O_{4} \to C r_{2} (S O_{4})_{3} + 4 K_{2} S O_{4} + 7 H_{2} O + I_{2}$ $2 C u C O_{4} + 4 K I \to C u_{2} I_{2} + 2 K_{2} S O_{4} + I_{2}$ $I_{2} + N a_{2} S_{2} O_{3} \to 2 N a I + N a_{2} S_{4} O_{6}$ In iodometric titrations, starch solution is used as an indicator. Starch solution gives blue or violet colour with free iodine. At the end point, blue or voilet colour disappears when iodine is completely changed to iodide. What volume of $0.40 M N a_{2} S_{2} O_{3}$ would be required $(in mL)$ to react with $I_{2}$ liberated by adding $0.04$ mole of $K I$ to $50 mL$ of $0.20 M C u S O_{4}$ solution?

Discussion

38.	According to molecular orbital theory, which of the following is true with respect to Li2+and Li2-? 1)Both are unstable (2) Li2+ is unstable and Li2- is stable (3)Li2+ is stable and Li2- is unstable (4) Both are stabl
Answer» According to molecular orbital theory, which of the following is true with respect to Li2+and Li2-? 1)Both are unstable (2) Li2+ is unstable and Li2- is stable (3)Li2+ is stable and Li2- is unstable (4) Both are stabl

Discussion

39.	38. 1 mole is equal to what
Answer» 38. 1 mole is equal to what

Discussion

40.	The element which shows only negative oxidation state/s among following elements is:
Answer» The element which shows only negative oxidation state/s among following elements is:

Discussion

41.	Which of the following relation is correct for the reaction PCl5(g)→PCl3(g)+Cl2(g)
Answer» Which of the following relation is correct for the reaction $P C l_{5} (g) \to P C l_{3} (g) + C l_{2} (g)$

Discussion

42.	In a face centerd lattice of X and Y, X atoms are present at the corners while Y atoms are at the face centers. If two X atoms are removed from the corners, the formula of the compound would be:
Answer» In a face centerd lattice of X and Y, X atoms are present at the corners while Y atoms are at the face centers. If two X atoms are removed from the corners, the formula of the compound would be:

Discussion

43.	Which of the following pairs of species have the same bond order?
Answer» Which of the following pairs of species have the same bond order?

Discussion

44.	Two metallic oxides contain 27.6% and 30% oxygen respectively. If the formula of the first oxide is X3O4 that of the second will be?
Answer» Two metallic oxides contain 27.6% and 30% oxygen respectively. If the formula of the first oxide is X3O4 that of the second will be?

Discussion

45.	Given that 10g of a dibasic acid (molar mass = 100) are present in 600 mL of the solution. The density of the solution is 1.02 g mL^{-1}. Molality of solution is
Answer» Given that 10g of a dibasic acid (molar mass = 100) are present in 600 mL of the solution. The density of the solution is 1.02 g mL^{-1}. Molality of solution is

Discussion

46.	The final product of complete oxidation of hydrocarbons is
Answer» The final product of complete oxidation of hydrocarbons is

Discussion

47.	The compound that has the highest lattice energy is:
Answer» The compound that has the highest lattice energy is:

Discussion

48.	What is crystal lattice and unit fell state also their properties
Answer» What is crystal lattice and unit fell state also their properties

Discussion

49.	Basic nature of oxides of group13 element increases down the group
Answer» Basic nature of oxides of group13 element increases down the group

Discussion

50.	Calculate a) ΔG°and b) the equilibrium constant for the formation of NO2 from NO and O2 at 298 Kwhere ΔfG° (NO2) = 52.0 kJ/molΔfG° (NO) = 87.0 kJ/molΔfG° (O2) = 0 kJ/mol
Answer» Calculate a) ΔG°and b) the equilibrium constant for the formation of NO₂ from NO and O₂ at 298 K where Δ_fG° (NO₂) = 52.0 kJ/mol Δ_fG° (NO) = 87.0 kJ/mol Δ_fG° (O₂) = 0 kJ/mol

50.

Calculate a) ΔG°and b) the equilibrium constant for the formation of NO2 from NO and O2 at 298 Kwhere ΔfG° (NO2) = 52.0 kJ/molΔfG° (NO) = 87.0 kJ/molΔfG° (O2) = 0 kJ/mol

Answer»

Calculate a) ΔG°and b) the equilibrium constant for the formation of NO₂ from NO and O₂ at 298 K

where Δ_fG° (NO₂) = 52.0 kJ/mol

Δ_fG° (NO) = 87.0 kJ/mol

Δ_fG° (O₂) = 0 kJ/mol

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why there is no loss of exchange energy at d6 configuration? And if it is because the atoms are in ion form and thus they are present in aqueous medium (h2o) then also h20 is weak field ligand so electrons can't pair In it then why there is no loss of exchange energy in d6?

39. Which one of the following sets of compounds correctly illustrate the law of reciprocal propotion a) P2O3, PH3, H2O b) N2O5, NH3, H2O c)NO2, NH3, H2O d) P2O5, PH3, H2O e) N2O, NH3, H2O

Plot the graph:-Kinetic energy of ejected photoelectrons(in Photoelectric Effect) versus the intensity of incident light.

What is meant degenerate orbitals? How to calculate them? What is meant by four fold degeneracy, how to calculate that?

Which of the following is also referred to as ‘Marshall’s acid’?

The type of reaction that gives constant half life is

0.157 g of a certain gas collected over water occupied a volume of 135 ml at 270 C and 750 mm of Hg. Assuming ideal behaviour, the molecular weight of the gas is (aqueous tension at 270 C is 26.7 mm of Hg)

Total number of anti-aromatic compund is .

How to detect whether a substituent group attached to benzene ring is in the same plane of benzenze ring or not?

The number of unpaired electrons in O, molecule is(1) Zero(2) 1(3) 2(4) 3

1-Chloro-pent-1,3-diene will have X number of geometrical isomers. The the value of X is

If Zn2+ ions lying on one of the body diagonals ofZnS (sphalerite) unit cell are removed, the ratio ofcation and anion would become (1) 4:3 (2) 3:4 (4) 8:7(3) 7:8

How to convert benzo trichloride to benzoic acid

When MnO2 is fused with KOH, a coloured compound is formed. The product and its colour is

28. a 0.075molar solution of monobasic acid has a freezing ppint of -0.18celcius calculate ka for the acid.

s all P-F bond in PF5 and S-F bond in SF5 are equal

46 The strongest P-O bond is present in a. F3PO b. Cl3PO c. Br3PO d. (CH3)3PO

how to find reaction order in coupling reactions??

Temperature of a 5 mole of hydrogen gas decreases by 260 K while expanded through adiabatic process. Find the work done by the gas. What is the change in internal energy of the gas?

Which one of the following is wrong?

Write the monomers used for getting the following polymers. (i) Polyvinyl chloride (ii) Teflon (iii) Bakelite

Which of the following compound(s) will show plane of symmetry

If A is a unit matrix of order n, then A (adj A) = ___________________.

the ratio of coefficient of co2 to fec204 in the balanced reaction is :- kmno4 + fec2o4 + h2so4 --> k2so4 + mnso4 + co2 + h20 + fe2(so4)3. kindly explain with the help of steps.

The volume strength of solution formed by mixing 1L of 0.5M H2O2 with 2L 0.5 M H2O2 is

Non-stoichiometric cuprous oxide, Cu2O can be prepared in laboratory. In this oxide, copper to oxygen ratio is slightly less than 2:1. Can you account for the fact that this substance is a p-type semiconductor?

The freezing point of a solution containing 0.2 g of acetic acid in 20 g of benzene is lowered by 0.45∘C.. Choose the correct option(s) :Given :(Kf)Benzene=5.12 K kg mol−1

The value of A and Z in the following nuclear reaction is2512Mg+42He→11H+AZX

Ionization Enthalpy

2.5 g of a monobasic acid when dissolved in 100 g of water elevates the boiling point of the solution by 0.256∘C. If 0.5 g of the acid requires 8 milliequivalents of NaOH for complete neutralisation, then the degree of dissociation of the acid is: [Kb of water =0.512Kkgmol−1]

Blue solution of CuSO4 becomes darker when treated with ammonia because

PA and PB are the vapour pressures of pure liquid components, A and B, respectively of an ideal binary solution. If xA represents the mole fraction of component A, the total pressure of the solution will be:[1 mark]

Predictthe products of electrolysis in each of the following:(i) An aqueous solution of AgNO3with silver electrodes.(ii) An aqueous solution of AgNO3withplatinum electrodes.(iii) A dilute solution of H2SO4withplatinum electrodes.(iv) An aqueous solution of CuCl2with platinum electrodes.

calculate mass of urea required in making 2.5 kg of 0.25 molal aqueous solution ?

The △H and △S for a reaction at one atmospheric pressure are +30.558 kJ and 0.066 k J k−1 respectively. The temperature at which the free energy change will be zero and below of this temperature the nature of reaction would be

How to learn the structure of pyridine,firon,purane etc

According to molecular orbital theory, which of the following is true with respect to Li2+and Li2-? 1)Both are unstable (2) Li2+ is unstable and Li2- is stable (3)Li2+ is stable and Li2- is unstable (4) Both are stabl

38. 1 mole is equal to what

The element which shows only negative oxidation state/s among following elements is:

Which of the following relation is correct for the reaction PCl5(g)→PCl3(g)+Cl2(g)

In a face centerd lattice of X and Y, X atoms are present at the corners while Y atoms are at the face centers. If two X atoms are removed from the corners, the formula of the compound would be:

Which of the following pairs of species have the same bond order?

Two metallic oxides contain 27.6% and 30% oxygen respectively. If the formula of the first oxide is X3O4 that of the second will be?

Given that 10g of a dibasic acid (molar mass = 100) are present in 600 mL of the solution. The density of the solution is 1.02 g mL^{-1}. Molality of solution is

The final product of complete oxidation of hydrocarbons is

The compound that has the highest lattice energy is:

What is crystal lattice and unit fell state also their properties

Basic nature of oxides of group13 element increases down the group

Calculate a) ΔG°and b) the equilibrium constant for the formation of NO2 from NO and O2 at 298 Kwhere ΔfG° (NO2) = 52.0 kJ/molΔfG° (NO) = 87.0 kJ/molΔfG° (O2) = 0 kJ/mol