46295 + Interview Questions in Chemistry

1.	what is fajan's rule ?
Answer» what is fajan's rule ?

Discussion

2.	Classify the followingamines as primary, secondary or tertiary:(i) (ii) (iii) (C2H5)2CHNH2(iv) (C2H5)2NH
Answer» Classify the following amines as primary, secondary or tertiary: (i) (ii) (iii) (C₂H₅)₂CHNH₂ (iv) (C₂H₅)₂NH

2.

Classify the followingamines as primary, secondary or tertiary:(i) (ii) (iii) (C2H5)2CHNH2(iv) (C2H5)2NH

Answer»

Classify the following
amines as primary, secondary or tertiary:

(i)

(ii)

(iii) (C₂H₅)₂CHNH₂

(iv) (C₂H₅)₂NH

Discussion

3.	4.00 moles of N2 and 3.00 moles of H2 are allowed to react in the presence of iron as a catalyst according to the reaction: N2(g)+3H2(g)Fe→2NH3(g). The number of molecules of the gas left unreacted will be
Answer» $4.00$ moles of $N_{2}$ and $3.00$ moles of $H_{2}$ are allowed to react in the presence of iron as a catalyst according to the reaction: $N_{2} (g) + 3 H_{2} (g) F e \to 2 N H_{3} (g) .$ The number of molecules of the gas left unreacted will be

Discussion

4.	If the ionization enthalpy and electron gain enthalpy of an element are 275 Kcal/mole and 86 Kcal mol−1 respectively, then the electro negativity of the element on mulliken scale is
Answer» If the ionization enthalpy and electron gain enthalpy of an element are 275 Kcal/mole and 86 Kcal ${m o l}^{- 1}$ respectively, then the electro negativity of the element on mulliken scale is

Discussion

5.	If relative decrease in vapour pressure is 0.4 for a solution containg 1 mol of nacl in 3 mol of water then % ionization Of nacl is
Answer» If relative decrease in vapour pressure is 0.4 for a solution containg 1 mol of nacl in 3 mol of water then % ionization Of nacl is

Discussion

6.	For real gases the relation between, P, V and T is given by van der Waals' equation (P+an2V2)(V−nb)=nRT where 'a' and 'b' are van der Waals' constants, 'nb' is approximately equal to the total volume of the molecules of a gas. 'a' is the measure of the magnitude of intermolecular attraction. (i) Arrange the following gases in the increasing order of 'b' Give reason. O2, CO2, H2, He (ii) Arrange the following gases in the descending order of magnitude of 'a'. Give reason. CH4, O2, H2
Answer» For real gases the relation between, P, V and T is given by van der Waals' equation $(P + \frac{a n^{2}}{V^{2}}) (V - n b) = n R T$ where 'a' and 'b' are van der Waals' constants, 'nb' is approximately equal to the total volume of the molecules of a gas. 'a' is the measure of the magnitude of intermolecular attraction. (i) Arrange the following gases in the increasing order of 'b' Give reason. $O_{2}, C O_{2}, H_{2}, H e$ (ii) Arrange the following gases in the descending order of magnitude of 'a'. Give reason. $C H_{4}, O_{2}, H_{2}$

6.

For real gases the relation between, P, V and T is given by van der Waals' equation (P+an2V2)(V−nb)=nRT where 'a' and 'b' are van der Waals' constants, 'nb' is approximately equal to the total volume of the molecules of a gas. 'a' is the measure of the magnitude of intermolecular attraction. (i) Arrange the following gases in the increasing order of 'b' Give reason. O2, CO2, H2, He (ii) Arrange the following gases in the descending order of magnitude of 'a'. Give reason. CH4, O2, H2

Answer»

For real gases the relation between, P, V and T is given by van der Waals' equation

$(P + \frac{a n^{2}}{V^{2}}) (V - n b) = n R T$

where 'a' and 'b' are van der Waals' constants, 'nb' is approximately equal to the total volume of the molecules of a gas. 'a' is the measure of the magnitude of intermolecular attraction.

(i) Arrange the following gases in the increasing order of 'b' Give reason.

$O_{2}, C O_{2}, H_{2}, H e$

(ii) Arrange the following gases in the descending order of magnitude of 'a'. Give reason.

$C H_{4}, O_{2}, H_{2}$

Discussion

7.	Give the atomic number of the inert gas atom in which the total number of d-electrons is equal to the difference in the number of total p and s electrons.
Answer» Give the atomic number of the inert gas atom in which the total number of d-electrons is equal to the difference in the number of total p and s electrons.

Discussion

8.	When a mixture of sugar and common salt has to be separated using simple crystallisation we use ethanol as a suitable solvent; at 75°C sugar is soluble in suitable solvent and NaCl is not, so it's sugar which crystallises out. Then why does the less soluble substance crystallise out first in fractional crystallisation ?
Answer» When a mixture of sugar and common salt has to be separated using simple crystallisation we use ethanol as a suitable solvent; at 75°C sugar is soluble in suitable solvent and NaCl is not, so it's sugar which crystallises out. Then why does the less soluble substance crystallise out first in fractional crystallisation ?

Discussion

9.	Calculate n-factor of Na3PO4 in the following reaction.Na3PO4 +3BaCl2 → 6NaCl + Ba3(PO4)2
Answer» Calculate n-factor of $N a_{3} P O_{4}$ in the following reaction. $N a_{3} P O_{4}$ + $3 B a C l_{2}$ $\to$ 6NaCl + $B a_{3} (P O_{4})_{2}$

9.

Calculate n-factor of Na3PO4 in the following reaction.Na3PO4 +3BaCl2 → 6NaCl + Ba3(PO4)2

Answer»

Calculate n-factor of $N a_{3} P O_{4}$ in the following reaction.

$N a_{3} P O_{4}$ + $3 B a C l_{2}$ $\to$ 6NaCl + $B a_{3} (P O_{4})_{2}$

Discussion

10.	How to calculate the n factor of HCL, HNO3 and H3PO4?
Answer» How to calculate the n factor of HCL, HNO3 and H3PO4?

Discussion

11.	If the bond length of the C−O bond in CO is 1.128oA, what will be the value of the bond length in [Fe(CO)5]?
Answer» If the bond length of the C−O bond in CO is $1.128 o A$ , what will be the value of the bond length in $[F e (C O)_{5}]$ ?

Discussion

12.	the energy of hydrogen atom in ground state is -13.6eV.its energy correspondent to the quantum number n=5 is
Answer» the energy of hydrogen atom in ground state is -13.6eV.its energy correspondent to the quantum number n=5 is

Discussion

13.	In which case Raoult's law is not applicable:
Answer» In which case Raoult's law is not applicable:

Discussion

14.	Under isothermal condition a gas at 300K expands from 0.1L to 0.25 L against a cons†an t external pressure of 2 bar.The work done by the gas is 1.-30J 2.5KJ 3.25J 4.30
Answer» Under isothermal condition a gas at 300K expands from 0.1L to 0.25 L against a cons†an t external pressure of 2 bar.The work done by the gas is 1.-30J 2.5KJ 3.25J 4.30

Discussion

15.	Is there any formula to find geometrical and optical isomerism in co ordination compounds ??
Answer» Is there any formula to find geometrical and optical isomerism in co ordination compounds ??

Discussion

16.	Is it posible to make a particle which has an electron in it's center and a proton in it's orbital?
Answer» Is it posible to make a particle which has an electron in it's center and a proton in it's orbital?

Discussion

17.	52. If K.E of an electron , alpha particle and a photon are represented by E1, E2 and E3 respectively(provided all these have same de Broglie wavelength) then 1-E1=E2=E3 2-E1>E3>E2
Answer» 52. If K.E of an electron , alpha particle and a photon are represented by E1, E2 and E3 respectively(provided all these have same de Broglie wavelength) then 1-E1=E2=E3 2-E1>E3>E2

Discussion

18.	50. What is the flow of electrons in electrolytic cell in i) solution ii) from battery. And when nothing is mentioned , which direction is to be chosen?
Answer» 50. What is the flow of electrons in electrolytic cell in i) solution ii) from battery. And when nothing is mentioned , which direction is to be chosen?

Discussion

19.	A solid solution is made up of two solids 'A' and 'B'. Mass percentage of 'A' is 60% by mass in a solid solution. Find the molar mass of 'B', if the mole fraction of 'A' (xA) is 0.20 and molar mass of 'A' is 100 g/mol.
Answer» A solid solution is made up of two solids 'A' and 'B'. Mass percentage of 'A' is 60% by mass in a solid solution. Find the molar mass of 'B', if the mole fraction of 'A' $(x_{A}) is 0.20$ and molar mass of 'A' is 100 g/mol.

Discussion

20.	What is the boiling point order of isomeric dihalides
Answer» What is the boiling point order of isomeric dihalides

Discussion

21.	A neutral lithium atom has three protons, three electrons and some neutrons (depending on the isotope). The modulus of energy of an electron in the 2nd orbit of a Li++ ion is___ eV.
Answer» A neutral lithium atom has three protons, three electrons and some neutrons (depending on the isotope). The modulus of energy of an electron in the 2nd orbit of a $L i^{+ +}$ ion is___ eV.

Discussion

22.	What is difference in between Torsional strain ,angle strain and steric strain?
Answer» What is difference in between Torsional strain ,angle strain and steric strain?

Discussion

23.	Classify the following solids in different categories based on the nature of intermolecular forces operating in them:Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, and silicon carbide.
Answer» Classify the following solids in different categories based on the nature of intermolecular forces operating in them: Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, and silicon carbide.

23.

Classify the following solids in different categories based on the nature of intermolecular forces operating in them:Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, and silicon carbide.

Answer»

Classify the following solids in different categories based on the nature of intermolecular forces operating in them:

Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, and silicon carbide.

Discussion

24.	In which of the following pair both species have compairable bond order.(1) O2[AsF6], BaO2[O-O bond order](2) C2, CaC2[C-C bond order](3) C2H2, CaC2[C-C bond order](4) CaC2, N2–2[C-C and N-N bond order]
Answer» In which of the following pair both species have compairable bond order. (1) O2[AsF6], BaO2[O-O bond order] (2) C2, CaC2[C-C bond order] (3) C2H2, CaC2[C-C bond order] (4) CaC2, N2–2[C-C and N-N bond order]

Discussion

25.	The equilibrium constant for the reaction is 10. Calculate the value of ΔGo; (Given R=8.314 J K−1mol−1; T=300 K).
Answer» The equilibrium constant for the reaction is $10$ . Calculate the value of $Δ G^{o}$ ; (Given $R = 8.314 {J K}^{- 1} {mol}^{- 1}; T = 300 K$ ).

Discussion

26.	48. Oxidation number of Fe in FeSO4.(NH4)2SO4.6H2O
Answer» 48. Oxidation number of Fe in $F e S O_{4} . {(N H_{4})}_{2} S O_{4} .6 H_{2} O$

Discussion

27.	5.find the energy Q liberated in beta- &beta+ decays and in K-capture if the masses of the parent atom Mp, the daughter atom Md and acceleration m is known
Answer» 5.find the energy Q liberated in beta- &beta+ decays and in K-capture if the masses of the parent atom Mp, the daughter atom Md and acceleration m is known

Discussion

28.	Assertion : Hydrolysis of ester in acidic medium follows first order kinetics Reason: Hydrolysis ofester is independent of the concentration of acid used
Answer» Assertion : Hydrolysis of ester in acidic medium follows first order kinetics Reason: Hydrolysis ofester is independent of the concentration of acid used

Discussion

29.	Why is gold and silver used to make jewellery?
Answer» Why is gold and silver used to make jewellery?

Discussion

30.	Q. How to name epoxy compounds ?
Answer» Q. How to name epoxy compounds ?

Discussion

31.	During hydrolysis of imines to aldehydes, why is ammonia released when OH- is better leaving group than -NH2?
Answer» During hydrolysis of imines to aldehydes, why is ammonia released when OH- is better leaving group than -NH2?

Discussion

32.	FeCr2O4+Na2CO3+O2⟶X+Y+CO2 Mention X and Y.
Answer» $F e C r_{2} O_{4} + N a_{2} C O_{3} + O_{2} ⟶ X + Y + C O_{2}$ Mention X and Y.

Discussion

33.	Which of the following is not an information conveyed by a chemical equation? a) It conveys the names of various reac†an t and products. b) It conveys the formulae of the reac†an ts and products. c) It conveys about heat change during the reaction. d) It conveys how an element forms more than one compound.
Answer» Which of the following is not an information conveyed by a chemical equation? a) It conveys the names of various reac†an t and products. b) It conveys the formulae of the reac†an ts and products. c) It conveys about heat change during the reaction. d) It conveys how an element forms more than one compound.

Discussion

34.	Air enters a compressor at 100 kPa and 30∘C in a Brayton cycle. The air pressure after compression is 500 kPa. If the heat added is 623 kJ/kg, the back work ratio for the cycle is____.(For air, γ=1.4andCp=1.005kJ/kgK)0.436
Answer» Air enters a compressor at 100 kPa and $30^{\circ} C$ in a Brayton cycle. The air pressure after compression is 500 kPa. If the heat added is 623 kJ/kg, the back work ratio for the cycle is____. (For air, $γ = 1.4 a n d C_{p} = 1.005 k J / k g K$ ) 0.436

Discussion

35.	A car battery has _______resistance than a dry cell.
Answer» A car battery has _______resistance than a dry cell.

Discussion

36.	In what condition a neutron decay into proton, electron and antineutrino ?
Answer» In what condition a neutron decay into proton, electron and antineutrino ?

Discussion

37.	What is the covalency and what is the covalency of B in B[OH]4 - and it's oxidation state.
Answer» What is the covalency and what is the covalency of B in B[OH]4 - and it's oxidation state.

Discussion

38.	20. According to molecular orbital theory which of the following will not be viable molecule ? 1)He_2^+ 2)H_2^- 3)H_2^{2-} 4)He_2^{2+
Answer» 20. According to molecular orbital theory which of the following will not be viable molecule ? 1)He_2^+ 2)H_2^- 3)H_2^{2-} 4)He_2^{2+

Discussion

39.	200ml N/10 H2SO4 mix to 300 ml N/100NaOH
Answer» 200ml N/10 H2SO4 mix to 300 ml N/100NaOH

Discussion

40.	what is the difference between equivalent mass of O and O_2 ?
Answer» what is the difference between equivalent mass of O and O_2 ?

Discussion

41.	A process where the gas is taken from one state to another through infinitely small changes is called
Answer» A process where the gas is taken from one state to another through infinitely small changes is called

Discussion

42.	How many aluminium ions are present in 0.051 g of aluminium oxide?
Answer» How many aluminium ions are present in $0.051 g$ of aluminium oxide?

Discussion

43.	What is the percentage degree of dissociation of 0.05 M NH4OH at 25 oC solution having pH=10 ?
Answer» What is the percentage degree of dissociation of $0.05 M N H_{4} O H$ at $25^{o} C$ solution having $p H = 10$ ?

Discussion

44.	Why there is no change in the structure of the NH3 molecule
Answer» Why there is no change in the structure of the NH3 molecule

Discussion

45.	37. The K.4 x 10-12. The molar solubility of the salt isfor a sparingly soluble Ag,CrO4 isSP(1) 2.0 x 10- mol L-1(2) 1.0 x 10-4 mol L-1(3) 2.0 x 10-12 mol L-1 (4) 1.0 x 10-15 mol L-1
Answer» 37. The K.4 x 10-12. The molar solubility of the salt isfor a sparingly soluble Ag,CrO4 isSP(1) 2.0 x 10- mol L-1(2) 1.0 x 10-4 mol L-1(3) 2.0 x 10-12 mol L-1 (4) 1.0 x 10-15 mol L-1

Discussion

46.	What is the ratio of number of carbon atoms present in 2g of CH4 to that in 2g of CO.
Answer» What is the ratio of number of carbon atoms present in 2g of $C H_{4}$ to that in 2g of CO.

Discussion

47.	A rocket is launched by the PSLV in which fuel capacity is 500 kg. The rocket consumes 2 kg fuel in 1 s. Find the time taken by the rocket to consume 300 kg fuel.
Answer» A rocket is launched by the $P S L V$ in which fuel capacity is $500 kg$ . The rocket consumes $2 kg$ fuel in $1 s$ . Find the time taken by the rocket to consume $300 kg$ fuel.

Discussion

48.	Which of the following represent the correct electronic configuration of O2?
Answer» Which of the following represent the correct electronic configuration of $O_{2}$ ?

Discussion

49.	molarity of aqueous solution of glucose is 2.315 mol/L. mole fraction of glucose is
Answer» molarity of aqueous solution of glucose is 2.315 mol/L. mole fraction of glucose is

Discussion

50.	19. In alkaline hydrolysis of a tertiary alkyl halide by aqueous alkali if concentration of alkali is doubled what is rate of reaction
Answer» 19. In alkaline hydrolysis of a tertiary alkyl halide by aqueous alkali if concentration of alkali is doubled what is rate of reaction

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

what is fajan's rule ?

Classify the followingamines as primary, secondary or tertiary:(i) (ii) (iii) (C2H5)2CHNH2(iv) (C2H5)2NH

4.00 moles of N2 and 3.00 moles of H2 are allowed to react in the presence of iron as a catalyst according to the reaction: N2(g)+3H2(g)Fe→2NH3(g). The number of molecules of the gas left unreacted will be

If the ionization enthalpy and electron gain enthalpy of an element are 275 Kcal/mole and 86 Kcal mol−1 respectively, then the electro negativity of the element on mulliken scale is

If relative decrease in vapour pressure is 0.4 for a solution containg 1 mol of nacl in 3 mol of water then % ionization Of nacl is

Give the atomic number of the inert gas atom in which the total number of d-electrons is equal to the difference in the number of total p and s electrons.

Calculate n-factor of Na3PO4 in the following reaction.Na3PO4 +3BaCl2 → 6NaCl + Ba3(PO4)2

How to calculate the n factor of HCL, HNO3 and H3PO4?

If the bond length of the C−O bond in CO is 1.128oA, what will be the value of the bond length in [Fe(CO)5]?

the energy of hydrogen atom in ground state is -13.6eV.its energy correspondent to the quantum number n=5 is

In which case Raoult's law is not applicable:

Under isothermal condition a gas at 300K expands from 0.1L to 0.25 L against a cons†an t external pressure of 2 bar.The work done by the gas is 1.-30J 2.5KJ 3.25J 4.30

Is there any formula to find geometrical and optical isomerism in co ordination compounds ??

Is it posible to make a particle which has an electron in it's center and a proton in it's orbital?

52. If K.E of an electron , alpha particle and a photon are represented by E1, E2 and E3 respectively(provided all these have same de Broglie wavelength) then 1-E1=E2=E3 2-E1>E3>E2

50. What is the flow of electrons in electrolytic cell in i) solution ii) from battery. And when nothing is mentioned , which direction is to be chosen?

A solid solution is made up of two solids 'A' and 'B'. Mass percentage of 'A' is 60% by mass in a solid solution. Find the molar mass of 'B', if the mole fraction of 'A' (xA) is 0.20 and molar mass of 'A' is 100 g/mol.

What is the boiling point order of isomeric dihalides

A neutral lithium atom has three protons, three electrons and some neutrons (depending on the isotope). The modulus of energy of an electron in the 2nd orbit of a Li++ ion is___ eV.

What is difference in between Torsional strain ,angle strain and steric strain?

Classify the following solids in different categories based on the nature of intermolecular forces operating in them:Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, and silicon carbide.

In which of the following pair both species have compairable bond order.(1) O2[AsF6], BaO2[O-O bond order](2) C2, CaC2[C-C bond order](3) C2H2, CaC2[C-C bond order](4) CaC2, N2–2[C-C and N-N bond order]

The equilibrium constant for the reaction is 10. Calculate the value of ΔGo; (Given R=8.314 J K−1mol−1; T=300 K).

48. Oxidation number of Fe in FeSO4.(NH4)2SO4.6H2O

5.find the energy Q liberated in beta- &beta+ decays and in K-capture if the masses of the parent atom Mp, the daughter atom Md and acceleration m is known

Assertion : Hydrolysis of ester in acidic medium follows first order kinetics Reason: Hydrolysis ofester is independent of the concentration of acid used

Why is gold and silver used to make jewellery?

Q. How to name epoxy compounds ?

During hydrolysis of imines to aldehydes, why is ammonia released when OH- is better leaving group than -NH2?

FeCr2O4+Na2CO3+O2⟶X+Y+CO2 Mention X and Y.

Air enters a compressor at 100 kPa and 30∘C in a Brayton cycle. The air pressure after compression is 500 kPa. If the heat added is 623 kJ/kg, the back work ratio for the cycle is____.(For air, γ=1.4andCp=1.005kJ/kgK)0.436

A car battery has _______resistance than a dry cell.

In what condition a neutron decay into proton, electron and antineutrino ?

What is the covalency and what is the covalency of B in B[OH]4 - and it's oxidation state.

20. According to molecular orbital theory which of the following will not be viable molecule ? 1)He_2^+ 2)H_2^- 3)H_2^{2-} 4)He_2^{2+

200ml N/10 H2SO4 mix to 300 ml N/100NaOH

what is the difference between equivalent mass of O and O_2 ?

A process where the gas is taken from one state to another through infinitely small changes is called

How many aluminium ions are present in 0.051 g of aluminium oxide?

What is the percentage degree of dissociation of 0.05 M NH4OH at 25 oC solution having pH=10 ?

Why there is no change in the structure of the NH3 molecule

37. The K.4 x 10-12. The molar solubility of the salt isfor a sparingly soluble Ag,CrO4 isSP(1) 2.0 x 10- mol L-1(2) 1.0 x 10-4 mol L-1(3) 2.0 x 10-12 mol L-1 (4) 1.0 x 10-15 mol L-1

What is the ratio of number of carbon atoms present in 2g of CH4 to that in 2g of CO.

A rocket is launched by the PSLV in which fuel capacity is 500 kg. The rocket consumes 2 kg fuel in 1 s. Find the time taken by the rocket to consume 300 kg fuel.

Which of the following represent the correct electronic configuration of O2?

molarity of aqueous solution of glucose is 2.315 mol/L. mole fraction of glucose is

19. In alkaline hydrolysis of a tertiary alkyl halide by aqueous alkali if concentration of alkali is doubled what is rate of reaction