46295 + Interview Questions in Chemistry

1.	A solution is prepared by dissolving 1 g of albumin (a protein obtained from blood plasma), in 50 cm3 of aqueous solution. The solution has an osmotic pressure of 7.6mm Hg at 300 K Calculate the molar mass of albumin
Answer» A solution is prepared by dissolving $1 g$ of albumin (a protein obtained from blood plasma), in $50 c m^{3}$ of aqueous solution. The solution has an osmotic pressure of $7.6 m m H g at 300 K$ Calculate the molar mass of albumin

Discussion

2.	Mention the increasing order of acidity amongst O-cresol, phenol, O-nitrophenol.
Answer» Mention the increasing order of acidity amongst O-cresol, phenol, O-nitrophenol.

Discussion

3.	EXplain the diffrences between Iodimetry and Iodometry
Answer» EXplain the diffrences between Iodimetry and Iodometry

Discussion

4.	In the reaction : M + (x+y)NH3 ___> [M(NH3)x]+ +. [e(NH3)y]- {Where M is alkali metal } what is the meaning of 'x' and 'y'?
Answer» In the reaction : M + (x+y)NH₃ ____>_[M(NH3)x]+ _{+. [e(NH3)y]^-} _{^{{Where M is alkali metal } what is the meaning of 'x' and 'y'?}}

4.

In the reaction : M + (x+y)NH3 ___> [M(NH3)x]+ +. [e(NH3)y]- {Where M is alkali metal } what is the meaning of 'x' and 'y'?

Answer»

In the reaction :

M + (x+y)NH₃ ____>_[M(NH3)x]+ _{+. [e(NH3)y]^-}

_{^{{Where M is alkali metal } what is the meaning of 'x' and 'y'?}}

Discussion

5.	Arrange the following in decreasing order of their boiling points : 1) n-Butane2) 2-Methylbutane3) n-Pentane4) 2,2-Dimethylpropanea) 1>2>3>4b) 2>3>4>1c) 4>3>2>1d) 3>2>4>1
Answer» Arrange the following in decreasing order of their boiling points : 1) n-Butane 2) 2-Methylbutane 3) n-Pentane 4) 2,2-Dimethylpropane a) 1>2>3>4 b) 2>3>4>1 c) 4>3>2>1 d) 3>2>4>1

Discussion

6.	The spin only magnetic moment of Co in the compound Hg[Co(SCN)4] is: (where SCN− is a weak ligand)
Answer» The spin only magnetic moment of $C o$ in the compound $H g [C o (S C N)_{4}]$ is: (where $S C N^{-}$ is a weak ligand)

Discussion

7.	In which of the following 3c - 4e− bond is present?
Answer» In which of the following 3c - $4 e^{-}$ bond is present?

Discussion

8.	Major product(s) may be:
Answer» Major product(s) may be:

Discussion

9.	Increasing stability order of following carbocation will be:
Answer» Increasing stability order of following carbocation will be:

Discussion

10.	O2 undergoes photochemical dissociation into one normal oxygen and one excited oxygen atom, 1.967 eV more energetic than normal. The dissociation of O2 into two normal atoms of oxygen atoms requires 498kJ mole–1. What is the maximum wavelength effective for photochemical dissociation of O2?
Answer» O2 undergoes photochemical dissociation into one normal oxygen and one excited oxygen atom, 1.967 eV more energetic than normal. The dissociation of O2 into two normal atoms of oxygen atoms requires 498kJ mole–1. What is the maximum wavelength effective for photochemical dissociation of O2?

Discussion

11.	To 50 L of 0.2 N NaOH, 2.5 L of 2 N HCl and 15 L of 0.1 N FeCl3 solutions are added. What weight of Fe2O3 can be obtained from the precipitate? Also report the normality of NaOH left in the resultant solution.
Answer» To $50 L$ of $0.2 N N a O H, 2.5 L$ of $2 N H C l$ and $15 L$ of $0.1 N F e C l_{3}$ solutions are added. What weight of $F e_{2} O_{3}$ can be obtained from the precipitate? Also report the normality of NaOH left in the resultant solution.

Discussion

12.	Explainwhy BeH2molecule has a zero dipole moment although the Be–H bonds arepolar.
Answer» Explain why BeH₂ molecule has a zero dipole moment although the Be–H bonds are polar.

Discussion

13.	One mole of a solute A is dissolved in a given volume of a solvent. If solute undergoes association, it's Van't Hoff factor i is expressed as:
Answer» One mole of a solute A is dissolved in a given volume of a solvent. If solute undergoes association, it's Van't Hoff factor i is expressed as:

Discussion

14.	Which pair gives Cl2 at room temperature ?
Answer» Which pair gives Cl₂at room temperature ?

Discussion

15.	Why does sec butyl alcohol have a lesser boiling point than isobutyl alcohol when both are similarly branched?
Answer» Why does sec butyl alcohol have a lesser boiling point than isobutyl alcohol when both are similarly branched?

Discussion

16.

Data given for the following reaction is as follows:FeO(s)+C(graphite)⟶Fe(s)+CO(g) Substance ΔfHo (kJ mol−1) ΔSo (J mol−1K−1) FeO(s) -266.3 57.49 C(graphite) 0 5.74 Fe(s) 0 27.28 CO(g) -110.5 197.6 The minimum temperature in K at which the reaction becomes spontaneous is

Answer» Data given for the following reaction is as follows:

F e O_{(s)} + C_{(g r a p h i t e)} ⟶ F e_{(s)} + C O_{(g)}

Substance	$Δ_{f} H^{o}$ $(k J {mol}^{- 1})$	$Δ S^{o}$ $(J {mol}^{- 1} K^{- 1})$
$F e O_{(s)}$	-266.3	57.49
$C_{(g r a p h i t e)}$	0	5.74
$F e_{(s)}$	0	27.28
$C O_{(g)}$	-110.5	197.6

The minimum temperature in K at which the reaction becomes spontaneous is

Discussion

17.	What is the hybridization of s in SO32-
Answer» What is the hybridization of s in SO32-

Discussion

18.	How isammonia manufactured industrially?
Answer» How is ammonia manufactured industrially?

Discussion

19.	The second order Bragg diffraction of X-rays with 1.00 A from a set of parallel planes in a metal occurs at an angle 60. The distance between the scattering planes in the crystal is
Answer» The second order Bragg diffraction of X-rays with 1.00 A from a set of parallel planes in a metal occurs at an angle 60. The distance between the scattering planes in the crystal is

Discussion

20.	The major product of the following reaction is :
Answer» The major product of the following reaction is :

Discussion

21.	23. NH3+H2O gives NH4+ + OH- Is here NH3 is Arrhenius acid or Arrhenius base. Exlain in detail.
Answer» 23. NH3+H2O gives NH4+ + OH- Is here NH3 is Arrhenius acid or Arrhenius base. Exlain in detail.

Discussion

22.	Which of the following is the most acidic in nature?
Answer» Which of the following is the most acidic in nature?

Discussion

23.	Consider two reactions I. Zn+conc.HNO3(hot)→Zn(NO3)2+X+H2O II. Zn+dil.HNO3 (cold)→Zn(NO3)2+Y+H2O Compounds X and Y are respectively
Answer» Consider two reactions I. $Z n + c o n c . H N O_{3} (h o t) \to Z n (N O_{3})_{2} + X + H_{2} O$ II. $Z n + d i l . H N O_{3} (cold) \to Z n (N O_{3})_{2} + Y + H_{2} O$ Compounds X and Y are respectively

Discussion

24.	What is superposition state ??
Answer» What is superposition state ??

Discussion

25.	The species that exhibits the highest Rf value in a thin layer chromatogram using a non polar solvent on a silica gel is
Answer» The species that exhibits the highest R $_{f}$ value in a thin layer chromatogram using a non polar solvent on a silica gel is

Discussion

26.	What happens when ethyl bromide reacts with ethanolic potassium hydroxide?
Answer» What happens when ethyl bromide reacts with ethanolic potassium hydroxide?

Discussion

27.	The relative stability of the different oxidation states,TI+>TI3+,>Ga3+>Ga+TI+>In+>Ga+is because of
Answer» The relative stability of the different oxidation states, $T I^{+} > T I^{3 +}, > G a^{3 +} > G a^{+} T I^{+} > I n^{+} > G a^{+} is because of$

27.

The relative stability of the different oxidation states,TI+>TI3+,>Ga3+>Ga+TI+>In+>Ga+is because of

Answer»

The relative stability of the different oxidation states,

$T I^{+} > T I^{3 +}, > G a^{3 +} > G a^{+} T I^{+} > I n^{+} > G a^{+} is because of$

Discussion

28.	Q. 10g of Mno2 on reaction with HCL forms 2.24 L of Cl2(g) at NTP. The percentage purity of Mno2 is ?MnO2 + HCl → MnCl2 + Cl2 + H2O
Answer» Q. 10g of Mno2 on reaction with HCL forms 2.24 L of Cl2(g) at NTP. The percentage purity of Mno2 is ? MnO2 + HCl → MnCl2 + Cl2 + H2O

Discussion

29.	A d orbital can accommodate upto
Answer» A d orbital can accommodate upto

Discussion

30.	Calculate resonance energy of N2O if heat of formation of N2O is 82KJ/mol and bond energy of N triple bond N , N double bond N, N double bond O, O double bond O , 946KJ/mol , 418KJ/mol, 607KJ/mol, 498KJ/mol.
Answer» Calculate resonance energy of N2O if heat of formation of N2O is 82KJ/mol and bond energy of N triple bond N , N double bond N, N double bond O, O double bond O , 946KJ/mol , 418KJ/mol, 607KJ/mol, 498KJ/mol.

Discussion

31.	Fe2+ shows
Answer» $F e^{2 +}$ shows

Discussion

32.	The efficiency of a cell is 60%. Its cell reaction is:A(s)+B2+(aq)→A2+(aq)+B(s);ΔH=−240 kJThe standard electrode potential of cell is
Answer» The efficiency of a cell is $60 %$ . Its cell reaction is: $A (s) + B^{2 +} (a q) \to A^{2 +} (a q) + B (s); Δ H = - 240 k J$ The standard electrode potential of cell is

Discussion

33.	Calculate the wavelength of a photon (in nm) of energy 1 eV.
Answer» Calculate the wavelength of a photon (in nm) of energy 1 eV.

Discussion

34.	what is face center unit call?
Answer» what is face center unit call?

Discussion

35.	What would be bond order formula for Polyatomic molecules?
Answer» What would be bond order formula for Polyatomic molecules?

Discussion

36.	The number of P-O-P bonds in Phosphorus trioxide and Phosphorus pentoxide are ___ and ___ respectively.
Answer» The number of P-O-P bonds in Phosphorus trioxide and Phosphorus pentoxide are ___ and ___ respectively.

Discussion

37.	16. Identify the product in the reaction Acetylene with acidified potassium dichromate, what should be the product? 1)acetaldehyde 2)ethanol 3)ethanoic acid 4)methanol
Answer» 16. Identify the product in the reaction Acetylene with acidified potassium dichromate, what should be the product? 1)acetaldehyde 2)ethanol 3)ethanoic acid 4)methanol

Discussion

38.	The total mass of 1mole electron is (mass of 1e-=9.1*10-28g)
Answer» The total mass of 1mole electron is (mass of 1e-=9.1*10^-28g)

Discussion

39.	26. Calculate energy required to excite electron from ground state to 5th orbit of H atom
Answer» 26. Calculate energy required to excite electron from ground state to 5th orbit of H atom

Discussion

40.	A triatomic molecule of an ideal gas is in the shape of a triangle. It can be assumed that the atoms are at the vertices of the triangle and joined by massless rods. Internal energy of 1 mole of the gas at temperature T is xRT. The value of x is
Answer» A triatomic molecule of an ideal gas is in the shape of a triangle. It can be assumed that the atoms are at the vertices of the triangle and joined by massless rods. Internal energy of $1 mole$ of the gas at temperature $T$ is $x R T$ . The value of $x$ is

Discussion

41.	250 ml of 1M I2 is separately reacted with 0.5 M Cu2S solution, 0.5 M CuS solution and 0.5 M S2O2−3 solution, causing production of Cu+2 and SO2−4 in the first two and S4O2−6 in the last case along with iodide ions. Which of the following option(s) is/are correct assuming 100% completion of the reaction?
Answer» 250 ml of 1M $I_{2}$ is separately reacted with 0.5 M $C u_{2} S$ solution, 0.5 M CuS solution and 0.5 M $S_{2} O_{3}^{2 -}$ solution, causing production of $C u^{+ 2}$ and $S O_{4}^{2 -}$ in the first two and $S_{4} O_{6}^{2 -}$ in the last case along with iodide ions. Which of the following option(s) is/are correct assuming 100% completion of the reaction?

Discussion

42.	Why only three miles of phenylhydrazine are used in osazone formation. Why similar tautomerisation doesn't take place beyond c2.
Answer» Why only three miles of phenylhydrazine are used in osazone formation. Why similar tautomerisation doesn't take place beyond c2.

Discussion

43.	how to decide wheather a molecle is polar or non polar molecule
Answer» how to decide wheather a molecle is polar or non polar molecule

Discussion

44.	If b2, a2, c2 are in A.P., then a + b, b + c, c + a will be in
Answer» If $b^{2}$ , $a^{2}$ , $c^{2}$ are in A.P., then a + b, b + c, c + a will be in

Discussion

45.	The Bohr's energy equation for H -atomsreveals that the energy level of a shell is given by E = - 13.58/n2 eV. The smallest amount that an H-atoms will absorb, if in ground state is:
Answer» The Bohr's energy equation for H -atoms reveals that the energy level of a shell is given by E = - 13.58/n²eV. The smallest amount that an H-atoms will absorb, if in ground state is:

Discussion

46.	Why does the substrate not bind with the inhibitor?
Answer» Why does the substrate not bind with the inhibitor?

Discussion

47.	I am getting too confused while solving reaction based questions.I know the general reactions very well but at the time of paper solving all the reaction get messed up with each other and whole reaction get wrong.Please hint me how to study such lessons and how to solve questions intellectually.
Answer» I am getting too confused while solving reaction based questions.I know the general reactions very well but at the time of paper solving all the reaction get messed up with each other and whole reaction get wrong.Please hint me how to study such lessons and how to solve questions intellectually.

47.

I am getting too confused while solving reaction based questions.I know the general reactions very well but at the time of paper solving all the reaction get messed up with each other and whole reaction get wrong.Please hint me how to study such lessons and how to solve questions intellectually.

Answer»

I am getting too confused while solving reaction based questions.I

know the general reactions very well but at the time of paper solving all the reaction get messed up with each other and whole reaction get wrong.Please hint me how to study such lessons and how to solve questions intellectually.

Discussion

48.	An equimolar mixture of 'A' and 'B' is prepared. The total vapour pressure of this mixture as a function of mole fraction of B is found to be PT=300+600XB.Calculate the composition of vapour of this mixture (Assume that the number of moles going into the vapour phase is negligible in comparison to the number of moles present in the liquid phase).
Answer» An equimolar mixture of 'A' and 'B' is prepared. The total vapour pressure of this mixture as a function of mole fraction of B is found to be $P_{T} = 300 + 600 X_{B}$ . Calculate the composition of vapour of this mixture (Assume that the number of moles going into the vapour phase is negligible in comparison to the number of moles present in the liquid phase).

Discussion

49.	The Hinsberg's method is used for
Answer» The Hinsberg's method is used for

Discussion

50.

Thefollowing data were obtained during the first order thermaldecomposition of SO2Cl2at a constant volume. Experiment Time/s−1 Total pressure/atm 1 0 0.5 2 100 0.6 Calculatethe rate of the reaction when total pressure is 0.65 atm.

Answer»

The
following data were obtained during the first order thermal
decomposition of SO₂Cl₂
at a constant volume.

Experiment	Time/s⁻¹	Total pressure/atm
1	0	0.5
2	100	0.6

Calculate
the rate of the reaction when total pressure is 0.65 atm.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A solution is prepared by dissolving 1 g of albumin (a protein obtained from blood plasma), in 50 cm3 of aqueous solution. The solution has an osmotic pressure of 7.6mm Hg at 300 K Calculate the molar mass of albumin

Mention the increasing order of acidity amongst O-cresol, phenol, O-nitrophenol.

EXplain the diffrences between Iodimetry and Iodometry

In the reaction : M + (x+y)NH3 ___&gt; [M(NH3)x]+ +. [e(NH3)y]- {Where M is alkali metal } what is the meaning of 'x' and 'y'?

Arrange the following in decreasing order of their boiling points : 1) n-Butane2) 2-Methylbutane3) n-Pentane4) 2,2-Dimethylpropanea) 1>2>3>4b) 2>3>4>1c) 4>3>2>1d) 3>2>4>1

The spin only magnetic moment of Co in the compound Hg[Co(SCN)4] is: (where SCN− is a weak ligand)

In which of the following 3c - 4e− bond is present?

Major product(s) may be:

Increasing stability order of following carbocation will be:

O2 undergoes photochemical dissociation into one normal oxygen and one excited oxygen atom, 1.967 eV more energetic than normal. The dissociation of O2 into two normal atoms of oxygen atoms requires 498kJ mole–1. What is the maximum wavelength effective for photochemical dissociation of O2?

To 50 L of 0.2 N NaOH, 2.5 L of 2 N HCl and 15 L of 0.1 N FeCl3 solutions are added. What weight of Fe2O3 can be obtained from the precipitate? Also report the normality of NaOH left in the resultant solution.

Explainwhy BeH2molecule has a zero dipole moment although the Be–H bonds arepolar.

One mole of a solute A is dissolved in a given volume of a solvent. If solute undergoes association, it's Van't Hoff factor i is expressed as:

Which pair gives Cl2 at room temperature ?

Why does sec butyl alcohol have a lesser boiling point than isobutyl alcohol when both are similarly branched?

Data given for the following reaction is as follows:FeO(s)+C(graphite)⟶Fe(s)+CO(g) Substance ΔfHo (kJ mol−1) ΔSo (J mol−1K−1) FeO(s) -266.3 57.49 C(graphite) 0 5.74 Fe(s) 0 27.28 CO(g) -110.5 197.6 The minimum temperature in K at which the reaction becomes spontaneous is

What is the hybridization of s in SO32-

How isammonia manufactured industrially?

The second order Bragg diffraction of X-rays with 1.00 A from a set of parallel planes in a metal occurs at an angle 60. The distance between the scattering planes in the crystal is

The major product of the following reaction is :

23. NH3+H2O gives NH4+ + OH- Is here NH3 is Arrhenius acid or Arrhenius base. Exlain in detail.

Which of the following is the most acidic in nature?

Consider two reactions I. Zn+conc.HNO3(hot)→Zn(NO3)2+X+H2O II. Zn+dil.HNO3 (cold)→Zn(NO3)2+Y+H2O Compounds X and Y are respectively

What is superposition state ??

The species that exhibits the highest Rf value in a thin layer chromatogram using a non polar solvent on a silica gel is

What happens when ethyl bromide reacts with ethanolic potassium hydroxide?

The relative stability of the different oxidation states,TI+&gt;TI3+,&gt;Ga3+&gt;Ga+TI+&gt;In+&gt;Ga+is because of

Q. 10g of Mno2 on reaction with HCL forms 2.24 L of Cl2(g) at NTP. The percentage purity of Mno2 is ?MnO2 + HCl → MnCl2 + Cl2 + H2O

A d orbital can accommodate upto

Calculate resonance energy of N2O if heat of formation of N2O is 82KJ/mol and bond energy of N triple bond N , N double bond N, N double bond O, O double bond O , 946KJ/mol , 418KJ/mol, 607KJ/mol, 498KJ/mol.

Fe2+ shows

The efficiency of a cell is 60%. Its cell reaction is:A(s)+B2+(aq)→A2+(aq)+B(s);ΔH=−240 kJThe standard electrode potential of cell is

Calculate the wavelength of a photon (in nm) of energy 1 eV.

what is face center unit call?

What would be bond order formula for Polyatomic molecules?

The number of P-O-P bonds in Phosphorus trioxide and Phosphorus pentoxide are ___ and ___ respectively.

16. Identify the product in the reaction Acetylene with acidified potassium dichromate, what should be the product? 1)acetaldehyde 2)ethanol 3)ethanoic acid 4)methanol

The total mass of 1mole electron is (mass of 1e-=9.1*10-28g)

26. Calculate energy required to excite electron from ground state to 5th orbit of H atom

A triatomic molecule of an ideal gas is in the shape of a triangle. It can be assumed that the atoms are at the vertices of the triangle and joined by massless rods. Internal energy of 1 mole of the gas at temperature T is xRT. The value of x is

Why only three miles of phenylhydrazine are used in osazone formation. Why similar tautomerisation doesn't take place beyond c2.

how to decide wheather a molecle is polar or non polar molecule

If b2, a2, c2 are in A.P., then a + b, b + c, c + a will be in

The Bohr's energy equation for H -atomsreveals that the energy level of a shell is given by E = - 13.58/n2 eV. The smallest amount that an H-atoms will absorb, if in ground state is:

Why does the substrate not bind with the inhibitor?

I am getting too confused while solving reaction based questions.I know the general reactions very well but at the time of paper solving all the reaction get messed up with each other and whole reaction get wrong.Please hint me how to study such lessons and how to solve questions intellectually.

The Hinsberg's method is used for

Thefollowing data were obtained during the first order thermaldecomposition of SO2Cl2at a constant volume. Experiment Time/s−1 Total pressure/atm 1 0 0.5 2 100 0.6 Calculatethe rate of the reaction when total pressure is 0.65 atm.

In the reaction : M + (x+y)NH3 ___> [M(NH3)x]+ +. [e(NH3)y]- {Where M is alkali metal } what is the meaning of 'x' and 'y'?

The relative stability of the different oxidation states,TI+>TI3+,>Ga3+>Ga+TI+>In+>Ga+is because of

The number of P-O-P bonds in Phosphorus trioxide and Phosphorus pentoxide are _ and _ respectively.