46295 + Interview Questions in Chemistry

1.	Howwould you determine the standard electrode potential of the systemMg2+\| Mg?
Answer» How would you determine the standard electrode potential of the systemMg²⁺ \| Mg?

Discussion

2.	The number of sp3 hybridised boron atoms in borax are
Answer» The number of $s p^{3}$ hybridised boron atoms in borax are

Discussion

3.	A neon dioxygen mixture contains 70.6 gram dioxygen and 167.5 gram neon. If pressure of the mixture of gases in the cylinder is 25 bar. What is the partial pressure of dioxygen and neon in the mixture ?
Answer» A neon dioxygen mixture contains 70.6 gram dioxygen and 167.5 gram neon. If pressure of the mixture of gases in the cylinder is 25 bar. What is the partial pressure of dioxygen and neon in the mixture ?

Discussion

4.	CH2=CHCH2CH=CH2NBS−−−→ A, A is:
Answer» $C H_{2} = C H C H_{2} C H = C H_{2} N B S - -- \to$ A, A is:

Discussion

5.	Q 7/15 Lattice energy of NaCl is "X'. If ionic size ofA2+ is equal to Na and B2- is equal to CI, then latticeenergy of AB is 1.2x 2.8x 3.4x 4X
Answer» Q 7/15 Lattice energy of NaCl is "X'. If ionic size ofA2+ is equal to Na and B2- is equal to CI, then latticeenergy of AB is 1.2x 2.8x 3.4x 4X

Discussion

6.	A solution containing 2.675 g of CoCl3.6NH3 (Molar Mass = 267.5 g/mol) is passed through a cation exchanger. The chloride ions obtained in solution were treated with an excess of AgNO3 to give 4.78 g of AgCl (Molar mass = 143.5 g/mol). The formula of the complex is
Answer» A solution containing $2.675 g$ of $C o C l_{3} .6 N H_{3}$ (Molar Mass = $267.5 g / m o l$ ) is passed through a cation exchanger. The chloride ions obtained in solution were treated with an excess of $A g N O_{3}$ to give $4.78 g$ of $A g C l$ (Molar mass = $143.5 g / m o l$ ). The formula of the complex is

Discussion

7.	Explain electron gain enthalpy.
Answer» Explain electron gain enthalpy.

Discussion

8.	Why is hydrogen fluoride more stable and has highest bond dissociation enthalpy then HCL HBR and HI.
Answer» Why is hydrogen fluoride more stable and has highest bond dissociation enthalpy then HCL HBR and HI.

Discussion

9.	What happens when a magnesium ribbon is heated in presence of air?
Answer» What happens when a magnesium ribbon is heated in presence of air?

Discussion

10.	Classify soaps on the basis of their use for washing clothes and bathing.
Answer» Classify soaps on the basis of their use for washing clothes and bathing.

Discussion

11.	What is desomosome and hemidesomoses in adhering junction?
Answer» What is desomosome and hemidesomoses in adhering junction?

Discussion

12.	Calculation of packing efficiency in hcp(hexagonal closed packing) mathematically.
Answer» Calculation of packing efficiency in hcp(hexagonal closed packing) mathematically.

Discussion

13.	The maximum number of compounds that have the same net dipole moment is? The dipole moment μ of C−Cl = 1.5D (1) Ph−Cl (2)(3)(4)(5)(6)
Answer» The maximum number of compounds that have the same net dipole moment is? The dipole moment $μ$ of $C - C l$ = 1.5D (1) $P h - C l$ (2)(3) (4)(5)(6)

13.

The maximum number of compounds that have the same net dipole moment is? The dipole moment μ of C−Cl = 1.5D (1) Ph−Cl (2)(3)(4)(5)(6)

Answer»

The maximum number of compounds that have the same net dipole moment is? The dipole moment $μ$ of $C - C l$ = 1.5D

(1) $P h - C l$

(2)(3)

(4)(5)(6)

Discussion

14.	Which of the following metal carbonate is decomposed on heating
Answer» Which of the following metal carbonate is decomposed on heating

Discussion

15.	PhMeAi. KMnO4, OH−, Δ−−−−−−−−−−−−→ii. H3O+BSOCl2−−−−→CPhCOONa−−−−−−−→D Compound (D) is:
Answer» $P h M e A i . K M n O_{4}, O H^{-}, Δ - ----------- \to i i . H_{3} O^{+} B S O C l_{2} - --- \to C P h C O O N a - ------ \to D$ Compound (D) is:

Discussion

16.	What is the decreasing order of electron gain enthalpy in nitrogen family?
Answer» What is the decreasing order of electron gain enthalpy in nitrogen family?

Discussion

17.	Calculate the enthalpy of the following reaction. H2C = CH2(g) + H2(g) →CH3 − CH3(g) The bond energies of C - H, C - C, C = C & H - H are 99, 83, 147 & 104 Kcal respectively.
Answer» Calculate the enthalpy of the following reaction. $H_{2} C = C H_{2} (g) + H_{2} (g) \to C H_{3} - C H_{3} (g)$ The bond energies of C - H, C - C, C = C & H - H are 99, 83, 147 & 104 Kcal respectively.

Discussion

18.	Which of the following is the Fisher projection of L− threonine (also known as 2S, 3R −2−amino−hydroxy butanoic acid)?
Answer» Which of the following is the Fisher projection of $L -$ threonine (also known as $2 S, 3R - 2 -$ amino $-$ hydroxy butanoic acid)?

Discussion

19.	42. Aluminon reagent (C_{22}H_{23}N_3O_9) is adsorbed by aluminium hydroxide and give bright red adsorption complex. Approximate percentage of carbon (by mole) present in aluminon is A. 38.6 B. 55.8 C. 40.2 D. 30.8
Answer» 42. Aluminon reagent (C_{22}H_{23}N_3O_9) is adsorbed by aluminium hydroxide and give bright red adsorption complex. Approximate percentage of carbon (by mole) present in aluminon is A. 38.6 B. 55.8 C. 40.2 D. 30.8

Discussion

20.	91.The normality of a solution obtained by mixing 100ml of 0.2N HCL ml of 0.12 M H2SO4 IS : (1) 0.223N (2) 0.466N (3) 0.166N (4) 2.33 N
Answer» 91.The normality of a solution obtained by mixing 100ml of 0.2N HCL ml of 0.12 M H2SO4 IS : (1) 0.223N (2) 0.466N (3) 0.166N (4) 2.33 N

Discussion

21.	A vessel of uniform cross-section of length 500 cm as shown in figure is divided in two parts by a weightless and frictionless piston.One part contains 5 moles of He(g) and other part contains 2 moles of H2(g) and 4 mole of O2(g) added at the same temperature are pressure in which reaction takes place finally and vessel cooled to 300 K and 1 atm. What is the length of He compartment? (Assume volume of piston and volume of H2O(l) formed are negligible)
Answer» A vessel of uniform cross-section of length 500 cm as shown in figure is divided in two parts by a weightless and frictionless piston.One part contains 5 moles of He(g) and other part contains 2 moles of $H_{2}$ (g) and 4 mole of $O_{2}$ (g) added at the same temperature are pressure in which reaction takes place finally and vessel cooled to 300 K and 1 atm. What is the length of He compartment? (Assume volume of piston and volume of $H_{2} O$ (l) formed are negligible)

21.

A vessel of uniform cross-section of length 500 cm as shown in figure is divided in two parts by a weightless and frictionless piston.One part contains 5 moles of He(g) and other part contains 2 moles of H2(g) and 4 mole of O2(g) added at the same temperature are pressure in which reaction takes place finally and vessel cooled to 300 K and 1 atm. What is the length of He compartment? (Assume volume of piston and volume of H2O(l) formed are negligible)

Answer»

A vessel of uniform cross-section of length 500 cm as shown in figure is divided in two parts by a weightless and frictionless piston.One part contains 5 moles of He(g) and other part contains 2 moles of $H_{2}$ (g) and 4 mole of $O_{2}$ (g) added at the same temperature are pressure in which reaction takes place finally and vessel cooled to 300 K and 1 atm. What is the length of He compartment? (Assume volume of piston and volume of $H_{2} O$ (l) formed are negligible)

Discussion

22.	macro nutrients in order of their reactio
Answer» macro nutrients in order of their reactio

Discussion

23.	Which of the following reagents could be used to distinguish between prop-2-en-1-ol and propan-1-ol?
Answer» Which of the following reagents could be used to distinguish between prop-2-en-1-ol and propan-1-ol?

Discussion

24.	The random or zig-zag motion of the colloidal particles in the dispersion medium is referred to as –
Answer» The random or zig-zag motion of the colloidal particles in the dispersion medium is referred to as –

Discussion

25.	MnO4- oxidation state solution? and n factor?
Answer» MnO4- oxidation state solution? and n factor?

Discussion

26.	Given the equilibrium constant values(I) N2(g)+12O2(g)⇌N2O(g); KC=2.7×10−18(II) N2O4(g)⇌2NO(g); KC=4.6×10−3(III) 12N2(g)+O2(g)⇌NO2(g) KC4.1×10−9Thus for the reaction,2N2O(g)+3O2(g)⇌2N2O4(g),KC is
Answer» Given the equilibrium constant values $(I) N_{2} (g) + \frac{1}{2} O_{2} (g) ⇌ N_{2} O (g); K_{C} = 2.7 \times 10^{- 18}$ $(I I) N_{2} O_{4} (g) ⇌ 2 N O (g); K_{C} = 4.6 \times 10^{- 3}$ $(I I I) \frac{1}{2} N_{2} (g) + O_{2} (g) ⇌ N O_{2} (g) K_{C} 4.1 \times 10^{- 9}$ Thus for the reaction, $2 N_{2} O (g) + 3 O_{2} (g) ⇌ 2 N_{2} O_{4} (g), K_{C}$ is

Discussion

27.	The electric field associated with an EM wave in vacuum is given by E =40 cos (kz−6 ×108 t) ˆi, where E, z and t are in V/m, meter and seconds respectively. The value of wave vector k is
Answer» The electric field associated with an $E M$ wave in vacuum is given by $E = 40 cos (k z - 6 \times 10^{8} t) ˆ i$ , where $E$ , $z$ and $t$ are in $V / m$ , meter and seconds respectively. The value of wave vector $k$ is

Discussion

28.	What volume of a 0.20 M KOH solution will exactly neutralize 15 mL of a 0.40 M HCl solution?
Answer» What volume of a $0.20 M K O H$ solution will exactly neutralize $15 mL$ of a $0.40 M H C l$ solution?

Discussion

29.	Prove the identity: sin A1+cos A=cosec A−cot A [3 MARKS]
Answer» Prove the identity: $\frac{s i n A}{1 + c o s A} = c o s e c A - c o t A$ [3 MARKS]

Discussion

30.	A ring is cut out from a Pt tube 8.5 cm internal diameter and 8.7 cm external diameter. It is supported horizontally from a pan of a balance so that it comes in contact with the water in a glass vessel. If an extra 3.47gm wt. is required to pull it away from the water, Surface tension of water in dyne/cm is
Answer» A ring is cut out from a Pt tube 8.5 cm internal diameter and 8.7 cm external diameter. It is supported horizontally from a pan of a balance so that it comes in contact with the water in a glass vessel. If an extra 3.47gm wt. is required to pull it away from the water, Surface tension of water in dyne/cm is

Discussion

31.	9. Is lactic acid optically active??
Answer» 9. Is lactic acid optically active??

Discussion

32.	Find Kp for t following reaction SO2 Cl2 gives SO2 +Cl2 If sulphuryl chloride decomposes to the extent of 91.2% a t 102°C and total pressure 1 atm
Answer» Find Kp for t following reaction SO2 Cl2 gives SO2 +Cl2 If sulphuryl chloride decomposes to the extent of 91.2% a t 102°C and total pressure 1 atm

Discussion

33.	To prepare a pure sample of n - hexane using sodium metal as one reactant, the other reactant(s) will be
Answer» To prepare a pure sample of n - hexane using sodium metal as one reactant, the other reactant(s) will be

Discussion

34.	An electric current is passed through silver voltameter connected to a water voltameter the cathode of the silver voltameter weighed 0.108g more at the end of the electrolysis the volume of oxygen evolved at STP is
Answer» An electric current is passed through silver voltameter connected to a water voltameter the cathode of the silver voltameter weighed 0.108g more at the end of the electrolysis the volume of oxygen evolved at STP is

Discussion

35.	Gas masks containing activated charcoal to remove poisonous gases from atmosphere acts on principle of -
Answer» Gas masks containing activated charcoal to remove poisonous gases from atmosphere acts on principle of -

Discussion

36.	Limiting molar conductivity of which among thefollowing ion is maximum in water at 298 K(1) H\ast(2) Nat40(3) K\ast(4) Ca2+
Answer» Limiting molar conductivity of which among thefollowing ion is maximum in water at 298 K(1) H\ast(2) Nat40(3) K\ast(4) Ca2+

Discussion

37.	The vapour density of a hydrocarban is 30.if on complete combustion of hydrocarbon ,8.8gmco_{2 }and 5.4gm H_2o are obtained then the molecular formula of hydrocarban is (1)C_3H_{8 }(2)C_4H_{12} (3)C_2H_{6 }(4)C_2H_{
Answer» The vapour density of a hydrocarban is 30.if on complete combustion of hydrocarbon ,8.8gmco_{2 }and 5.4gm H_2o are obtained then the molecular formula of hydrocarban is (1)C_3H_{8 }(2)C_4H_{12} (3)C_2H_{6 }(4)C_2H_{

Discussion

38.	Identify the correct order of solubility in aqueous medium (1) ZnS > Na,S >CuS (2) Na,S> CuS > Zns(3) Na, S > ZnS > CuS (4) CuS > ZnS > Na,S
Answer» Identify the correct order of solubility in aqueous medium (1) ZnS > Na,S >CuS (2) Na,S> CuS > Zns(3) Na, S > ZnS > CuS (4) CuS > ZnS > Na,S

Discussion

39.	why the dipole moment of vinyl chloride increases due to the resonance effect?
Answer» why the dipole moment of vinyl chloride increases due to the resonance effect?

Discussion

40.	For the preparation of H2SO4 from iron pyrite [FeS2] involves following set of reaction.FeS2+O2→Fe2O3+SO2SO2+O2→SO3SO3+H2O→H2SO4Calculate the weight of H2SO4 which can be obtained when 240 kg of FeS2 is used.
Answer» For the preparation of $H_{2} S O_{4}$ from iron pyrite $[F e S_{2}]$ involves following set of reaction. $F e S_{2} + O_{2} \to F e_{2} O_{3} + S O_{2}$ $S O_{2} + O_{2} \to S O_{3}$ $S O_{3} + H_{2} O \to H_{2} S O_{4}$ Calculate the weight of $H_{2} S O_{4}$ which can be obtained when $240 kg$ of $F e S_{2}$ is used.

Discussion

41.	93 0.4 g of an organic compound was kjeldahlised and the ammonia evolved was absorbed into 50 mL of M/4 sulphuric acid solution. The residual acid solution was diluted with distilled water and the volume was made upto 150 mL. 20 mL of this diluted solution required 31 mL of M/20 NaOH solution for complete neutralization. Calculate the percentage of nitrogen in the compound.
Answer» 93 0.4 g of an organic compound was kjeldahlised and the ammonia evolved was absorbed into 50 mL of M/4 sulphuric acid solution. The residual acid solution was diluted with distilled water and the volume was made upto 150 mL. 20 mL of this diluted solution required 31 mL of M/20 NaOH solution for complete neutralization. Calculate the percentage of nitrogen in the compound.

Discussion

42.	Calculate the ionic radius of a Cs+ ion assuming the cell edge length for CsCl is 0.4123 nm and that the ionic radius of a Cl- ion is 0.181 nm.
Answer» Calculate the ionic radius of a Cs⁺ ion assuming the cell edge length for CsCl is 0.4123 nm and that the ionic radius of a Cl^- ion is 0.181 nm.

Discussion

43.	how many significant figures in 10.0
Answer» how many significant figures in 10.0

Discussion

44.	A particle is moving 5 times as fast as an electron. The ratio of the de-Broglie wavelength of the particle to that of the electron is 1.878×10−4. The mass of the particle is close to
Answer» A particle is moving $5$ times as fast as an electron. The ratio of the de-Broglie wavelength of the particle to that of the electron is $1.878 \times 10^{- 4}$ . The mass of the particle is close to

Discussion

45.	Ar⊕N2⊖Cl+CH3CH2OH⟶ArH+N2+y+HClThe number of π and σ bonds in 'y' are:
Answer» $A r {\oplus N}_{2} ⊖ C l + C H_{3} C H_{2} O H ⟶ A r H + N_{2} + y + H C l$ The number of $π$ and $σ$ bonds in 'y' are:

Discussion

46.	The ratio of difference between 3rd and 2nd orbit of H atom and Li2+ ion is
Answer» The ratio of difference between $3^{r d}$ and $2^{n d}$ orbit of H atom and $L i^{2 +}$ ion is

Discussion

47.	8. Distance between tetrahedral and octahedral voids in fcc unit cell
Answer» 8. Distance between tetrahedral and octahedral voids in fcc unit cell

Discussion

48.	How JJ Thomson found the charge by mass ratio?
Answer» How JJ Thomson found the charge by mass ratio?

Discussion

49.	ntLi crystallizes in a bcc lattice , how many next nearest neighbour does each Li hasn
Answer» ntLi crystallizes in a bcc lattice , how many next nearest neighbour does each Li hasn

Discussion

50.	methyl isocyanate on alkaline hydrolysis gives 1.methyl cyanide 2.ethyl amine 3.methyl amine 4.methyl carbamic acid
Answer» methyl isocyanate on alkaline hydrolysis gives 1.methyl cyanide 2.ethyl amine 3.methyl amine 4.methyl carbamic acid

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Howwould you determine the standard electrode potential of the systemMg2+| Mg?

The number of sp3 hybridised boron atoms in borax are

A neon dioxygen mixture contains 70.6 gram dioxygen and 167.5 gram neon. If pressure of the mixture of gases in the cylinder is 25 bar. What is the partial pressure of dioxygen and neon in the mixture ?

CH2=CHCH2CH=CH2NBS−−−→ A, A is:

Q 7/15 Lattice energy of NaCl is "X'. If ionic size ofA2+ is equal to Na and B2- is equal to CI, then latticeenergy of AB is 1.2x 2.8x 3.4x 4X

A solution containing 2.675 g of CoCl3.6NH3 (Molar Mass = 267.5 g/mol) is passed through a cation exchanger. The chloride ions obtained in solution were treated with an excess of AgNO3 to give 4.78 g of AgCl (Molar mass = 143.5 g/mol). The formula of the complex is

Explain electron gain enthalpy.

Why is hydrogen fluoride more stable and has highest bond dissociation enthalpy then HCL HBR and HI.

What happens when a magnesium ribbon is heated in presence of air?

Classify soaps on the basis of their use for washing clothes and bathing.

What is desomosome and hemidesomoses in adhering junction?

Calculation of packing efficiency in hcp(hexagonal closed packing) mathematically.

The maximum number of compounds that have the same net dipole moment is? The dipole moment μ of C−Cl = 1.5D (1) Ph−Cl (2)(3)(4)(5)(6)

Which of the following metal carbonate is decomposed on heating

PhMeAi. KMnO4, OH−, Δ−−−−−−−−−−−−→ii. H3O+BSOCl2−−−−→CPhCOONa−−−−−−−→D Compound (D) is:

What is the decreasing order of electron gain enthalpy in nitrogen family?

Calculate the enthalpy of the following reaction. H2C = CH2(g) + H2(g) →CH3 − CH3(g) The bond energies of C - H, C - C, C = C &amp; H - H are 99, 83, 147 &amp; 104 Kcal respectively.

Which of the following is the Fisher projection of L− threonine (also known as 2S, 3R −2−amino−hydroxy butanoic acid)?

42. Aluminon reagent (C_{22}H_{23}N_3O_9) is adsorbed by aluminium hydroxide and give bright red adsorption complex. Approximate percentage of carbon (by mole) present in aluminon is A. 38.6 B. 55.8 C. 40.2 D. 30.8

91.The normality of a solution obtained by mixing 100ml of 0.2N HCL ml of 0.12 M H2SO4 IS : (1) 0.223N (2) 0.466N (3) 0.166N (4) 2.33 N

macro nutrients in order of their reactio

Which of the following reagents could be used to distinguish between prop-2-en-1-ol and propan-1-ol?

The random or zig-zag motion of the colloidal particles in the dispersion medium is referred to as –

MnO4- oxidation state solution? and n factor?

Given the equilibrium constant values(I) N2(g)+12O2(g)⇌N2O(g); KC=2.7×10−18(II) N2O4(g)⇌2NO(g); KC=4.6×10−3(III) 12N2(g)+O2(g)⇌NO2(g) KC4.1×10−9Thus for the reaction,2N2O(g)+3O2(g)⇌2N2O4(g),KC is

The electric field associated with an EM wave in vacuum is given by E =40 cos (kz−6 ×108 t) ˆi, where E, z and t are in V/m, meter and seconds respectively. The value of wave vector k is

What volume of a 0.20 M KOH solution will exactly neutralize 15 mL of a 0.40 M HCl solution?

Prove the identity: sin A1+cos A=cosec A−cot A [3 MARKS]

9. Is lactic acid optically active??

Find Kp for t following reaction SO2 Cl2 gives SO2 +Cl2 If sulphuryl chloride decomposes to the extent of 91.2% a t 102°C and total pressure 1 atm

To prepare a pure sample of n - hexane using sodium metal as one reactant, the other reactant(s) will be

An electric current is passed through silver voltameter connected to a water voltameter the cathode of the silver voltameter weighed 0.108g more at the end of the electrolysis the volume of oxygen evolved at STP is

Gas masks containing activated charcoal to remove poisonous gases from atmosphere acts on principle of -

Limiting molar conductivity of which among thefollowing ion is maximum in water at 298 K(1) H\ast(2) Nat40(3) K\ast(4) Ca2+

The vapour density of a hydrocarban is 30.if on complete combustion of hydrocarbon ,8.8gmco_{2 }and 5.4gm H_2o are obtained then the molecular formula of hydrocarban is (1)C_3H_{8 }(2)C_4H_{12} (3)C_2H_{6 }(4)C_2H_{

Identify the correct order of solubility in aqueous medium (1) ZnS > Na,S >CuS (2) Na,S> CuS > Zns(3) Na, S > ZnS > CuS (4) CuS > ZnS > Na,S

why the dipole moment of vinyl chloride increases due to the resonance effect?

For the preparation of H2SO4 from iron pyrite [FeS2] involves following set of reaction.FeS2+O2→Fe2O3+SO2SO2+O2→SO3SO3+H2O→H2SO4Calculate the weight of H2SO4 which can be obtained when 240 kg of FeS2 is used.

Calculate the ionic radius of a Cs+ ion assuming the cell edge length for CsCl is 0.4123 nm and that the ionic radius of a Cl- ion is 0.181 nm.

how many significant figures in 10.0

A particle is moving 5 times as fast as an electron. The ratio of the de-Broglie wavelength of the particle to that of the electron is 1.878×10−4. The mass of the particle is close to

Ar⊕N2⊖Cl+CH3CH2OH⟶ArH+N2+y+HClThe number of π and σ bonds in 'y' are:

The ratio of difference between 3rd and 2nd orbit of H atom and Li2+ ion is

8. Distance between tetrahedral and octahedral voids in fcc unit cell

How JJ Thomson found the charge by mass ratio?

ntLi crystallizes in a bcc lattice , how many next nearest neighbour does each Li hasn

methyl isocyanate on alkaline hydrolysis gives 1.methyl cyanide 2.ethyl amine 3.methyl amine 4.methyl carbamic acid

Calculate the enthalpy of the following reaction. H2C = CH2(g) + H2(g) →CH3 − CH3(g) The bond energies of C - H, C - C, C = C & H - H are 99, 83, 147 & 104 Kcal respectively.