46295 + Interview Questions in Chemistry

1.	The nearest distance between tetrahedral void and maximum distance between tetrahedral void are respectively
Answer» The nearest distance between tetrahedral void and maximum distance between tetrahedral void are respectively

Discussion

2.	Calculate Δr S⊗sys for the following reaction at 373 K: CO(g) + H2O(g) → CO2(g) + H2(g) ΔrH⊗ = −4.1 × 104 J, Δr S⊗univ = 56J/K
Answer» Calculate $Δ_{r} S_{s y s}^{\otimes}$ for the following reaction at 373 K: $C O (g) + H_{2} O (g) \to C O_{2} (g) + H_{2} (g)$ $Δ_{r} H^{\otimes} = - 4.1 \times 10^{4} J, Δ_{r} S_{u n i v}^{\otimes} = 56 J / K$

2.

Calculate Δr S⊗sys for the following reaction at 373 K: CO(g) + H2O(g) → CO2(g) + H2(g) ΔrH⊗ = −4.1 × 104 J, Δr S⊗univ = 56J/K

Answer»

Calculate $Δ_{r} S_{s y s}^{\otimes}$ for the following reaction at 373 K:

$C O (g) + H_{2} O (g) \to C O_{2} (g) + H_{2} (g)$

$Δ_{r} H^{\otimes} = - 4.1 \times 10^{4} J, Δ_{r} S_{u n i v}^{\otimes} = 56 J / K$

Discussion

3.	The main product obtained in the reaction of 2-butene with N-bromosuccinimide in presene of light is
Answer» The main product obtained in the reaction of 2-butene with N-bromosuccinimide in presene of light is

Discussion

4.	Substances which lower the body temperature are called:
Answer» Substances which lower the body temperature are called:

Discussion

5.	The arrangement of spheres present in hexagonal close packing is:
Answer» The arrangement of spheres present in hexagonal close packing is:

Discussion

6.	The major product (x) of the following reaction is:
Answer» The major product (x) of the following reaction is:

Discussion

7.	What is the order of acidic strength of H3PO4,H3PO3,H3PO2?
Answer» What is the order of acidic strength of $H_{3} P O_{4}, H_{3} P O_{3}, H_{3} P O_{2}$ ?

Discussion

8.	In the following reaction: The major product is:
Answer» In the following reaction: The major product is:

Discussion

9.	Common Data Question:In a simple Bryaton cycle, the pressure ratio is 8 and temperature at the entrance of compressor and turbine are 300K and 1400K respectively. Both compressor and gas turbine have isentropic efficiencies equal to 80%. or the gas, assume a constant value of cp (specific heat at constant pressure) equal to 1kJ/kgK and ratio of specific heats as 14. Neglect changes in kinetic and potential energiesThe power required by the compressor in kW/kg of gas flow are is
Answer» Common Data Question: In a simple Bryaton cycle, the pressure ratio is $8$ and temperature at the entrance of compressor and turbine are $300 K$ and $1400 K$ respectively. Both compressor and gas turbine have isentropic efficiencies equal to $80$ %. or the gas, assume a constant value of $c_{p}$ (specific heat at constant pressure) equal to $1 k J / k g K$ and ratio of specific heats as $14$ . Neglect changes in kinetic and potential energies The power required by the compressor in $k W / k g$ of gas flow are is

Discussion

10.	The threshold frequency for the ejection of an electron from a metal is equal to that of a photon corresponding to the last line of Balmer series of the hydrogen spectrum. Find the stopping potential (in volt) when photons corresponding to the last line of Lyman series fall on the metal.
Answer» The threshold frequency for the ejection of an electron from a metal is equal to that of a photon corresponding to the last line of Balmer series of the hydrogen spectrum. Find the stopping potential (in volt) when photons corresponding to the last line of Lyman series fall on the metal.

Discussion

11.	29.meaning of oxidising agent
Answer» 29.meaning of oxidising agent

Discussion

12.	What makes an eyelash/eyelid or hairs at other parts(armpits, pubic hairs) thicker than those on the head?
Answer» What makes an eyelash/eyelid or hairs at other parts(armpits, pubic hairs) thicker than those on the head?

Discussion

13.	The ionization constant of ammonium hydroxide is 1.77×10−5 at 298 K. Hydrolysis constant of ammonium chloride is:
Answer» The ionization constant of ammonium hydroxide is $1.77 \times 10^{- 5}$ at $298 K$ . Hydrolysis constant of ammonium chloride is:

Discussion

14.	Oxidation state of Cl in ClO2 is?
Answer» Oxidation state of Cl in ClO₂is?

Discussion

15.	The emf of the cell reaction,Zn(s)+Cu2+(aq.)→Zn2+(aq.)+Cu(s)is 1.1V. If enthalpy of the reaction is −216.7kJmol−1, calculate the entropy change for the reaction(in J/Kmole)
Answer» The emf of the cell reaction, $Z n (s) + {C u}^{2 +} (a q .) \to {Z n}^{2 +} (a q .) + C u (s)$ is $1.1 V$ . If enthalpy of the reaction is $- 216.7 k J {m o l}^{- 1}$ , calculate the entropy change for the reaction(in J/Kmole)

Discussion

16.	Of the following 0.10m aqueous solutions. which one will exhibit the largest freezing point depression?
Answer» Of the following $0.10 m$ aqueous solutions. which one will exhibit the largest freezing point depression?

Discussion

17.	Potassium crystallizes in a body centred cubic lattice. What is the approximate number of unit cells in 4.0 g of potassium? Atomic mass of potassium = 39
Answer» Potassium crystallizes in a body centred cubic lattice. What is the approximate number of unit cells in 4.0 g of potassium? Atomic mass of potassium = 39

Discussion

18.	The maximum kinetic energy of the photoelectrons ejected from a metal when it is irradiated with a radiation of frequency 2×1014s−1 is 6.63×10−20J. The thereshold frequency of the metal is:
Answer» The maximum kinetic energy of the photoelectrons ejected from a metal when it is irradiated with a radiation of frequency $2 \times 10^{14} s^{- 1}$ is $6.63 \times 10^{- 20} J$ . The thereshold frequency of the metal is:

Discussion

19.	43.The maximum number of electrons in an atom which can have n=4 is?
Answer» 43.The maximum number of electrons in an atom which can have n=4 is?

Discussion

20.	92.Coordination number in ferrocene
Answer» 92.Coordination number in ferrocene

Discussion

21.	In a cubic unit cell, seven of the eight corners are occupied by atoms A and centres of faces are occupied by atoms B. Total number of atoms in the general formula of the compound is:
Answer» In a cubic unit cell, seven of the eight corners are occupied by atoms A and centres of faces are occupied by atoms B. Total number of atoms in the general formula of the compound is:

Discussion

22.	If 100 ml of 1 M H2SO4 solution is mixed with 100 ml of 9.8% (w/w) H2SO4 solution (d=1 g/ml) then:
Answer» If 100 ml of $1 M H_{2} S O_{4}$ solution is mixed with 100 ml of $9.8 %$ (w/w) $H_{2} S O_{4}$ solution ( $d = 1 g / m l$ ) then:

Discussion

23.	14. Relative lowering of vapour pressure produced by dissolving 71.5g of a substance in 0.1000g of water is 0.00713.the molecular weight of the substance willl be
Answer» 14. Relative lowering of vapour pressure produced by dissolving 71.5g of a substance in 0.1000g of water is 0.00713.the molecular weight of the substance willl be

Discussion

24.	1.84 g mixture of CaCO_3 and MgCO_3 was heated to cons†an t weight till 0.96 g residue formed. %(by mass) of MgCO_3 in sample was
Answer» 1.84 g mixture of CaCO_3 and MgCO_3 was heated to cons†an t weight till 0.96 g residue formed. %(by mass) of MgCO_3 in sample was

Discussion

25.	What is the solubility of Al(OH)3(Ksp=1×10−33) in a buffer solution of pH=4?
Answer» What is the solubility of $A l (O H)_{3}$ $(K_{s p} = 1 \times 10^{- 33})$ in a buffer solution of $p H = 4$ ?

Discussion

26.	What are azeotropes
Answer» What are azeotropes

Discussion

27.	There is small hole in a hollow sphere . The water enters in it when it is taken to a depth of 40cm under water . The surface tension of water is 0.07N/m. Find the diameter of hole
Answer» There is small hole in a hollow sphere . The water enters in it when it is taken to a depth of 40cm under water . The surface tension of water is 0.07N/m. Find the diameter of hole

Discussion

28.

Consider the thermodynamic data at 25oC.MoleculeΔHof ( kJ/mol)CO2(g)xH2O(l)yCH4(g)zThe heat of combustion of CH4(g) in kJ/mol is

Answer»

Consider the thermodynamic data at $25^{o} C .$

Molecule	$Δ H_{f}^{o} ( kJ/mol)$
$C O_{2} (g)$	$x$
$H_{2} O (l)$	$y$
$C H_{4} (g)$	$z$

The heat of combustion of

C H_{4} (g)

in

kJ/mol

is

Discussion

29.	CaC2H2O−−→ACu2Cl2−−−−−→NH4OHB. Incorrect statement is
Answer» $C a C_{2} H_{2} O - - \to A C u_{2} C l_{2} - ---- \to N H_{4} O H B .$ Incorrect statement is

29.

CaC2H2O−−→ACu2Cl2−−−−−→NH4OHB. Incorrect statement is

Answer»

$C a C_{2} H_{2} O - - \to A C u_{2} C l_{2} - ---- \to N H_{4} O H B .$ Incorrect statement is

Discussion

30.	Which one of the following will give racemised product in C2H5OH ?
Answer» Which one of the following will give racemised product in $C_{2} H_{5} O H$ ?

Discussion

31.	Is it possible to photograph virtual image?
Answer» Is it possible to photograph virtual image?

Discussion

32.	How to calculate total number of nodes and nodal planes in a structure of hybrid orbital?
Answer» How to calculate total number of nodes and nodal planes in a structure of hybrid orbital?

Discussion

33.	9. Assuming complete ionization same no.of moles of which of the following compound will require least amount of acidified KMnO4 for complete oxidation 1.FeC2O4 2.Fe(NO2)2 3.FeSO4 4.FeSO3
Answer» 9. Assuming complete ionization same no.of moles of which of the following compound will require least amount of acidified KMnO4 for complete oxidation 1.FeC2O4 2.Fe(NO2)2 3.FeSO4 4.FeSO3

Discussion

34.	Calculate the equilibrium constant Kp for the reaction C(s)+CO2(G)⇌2co(g) at 1300K from the following data C(s)+2H2O(g)⇌CO2(g)+2H2(g)Kp(1300K)=3.9atm H2(g)+CO2(g)⇌CO(g)+H2O(g)Kp(1300K)=0.7atm
Answer» Calculate the equilibrium constant $K_{p}$ for the reaction $C_{(s)} + C O_{2 (G)} ⇌ 2 c o_{(g)}$ at 1300K from the following data $C_{(s)} + 2 H_{2} O_{(g)} ⇌ C O_{2 (g)} + 2 H_{2 (g)} K_{p} (1300 K) = 3.9 a t m$ $H_{2 (g)} + C O_{2 (g)} ⇌ C O_{(g)} + H_{2} O_{(g)} K_{p} (1300 K) = 0.7 a t m$

Discussion

35.	In which of the following equilibria, the value of KP is less than KC
Answer» In which of the following equilibria, the value of $K_{P}$ is less than $K_{C}$

35.

In which of the following equilibria, the value of KP is less than KC

Answer»

In which of the following equilibria, the value of $K_{P}$ is less than $K_{C}$

Discussion

36.	50. Did there is any way to know the charge on compound ion like OH etc.?
Answer» 50. Did there is any way to know the charge on compound ion like OH etc.?

Discussion

37.	what is sharpness of resonance?
Answer» what is sharpness of resonance?

Discussion

38.	1g of oleum sample is diluted with water the solution required 54ml of 0.4 N NaOH for complete neutralisation . the % of free SO3 in the sample is ?
Answer» 1g of oleum sample is diluted with water the solution required 54ml of 0.4 N NaOH for complete neutralisation . the % of free SO3 in the sample is ?

Discussion

39.	100ml of .3N HCL solution is mixed with 200ml of .6N H2SO4 solution what is the normality of H2SO4 in the final solution?
Answer» 100ml of .3N HCL solution is mixed with 200ml of .6N H2SO4 solution what is the normality of H2SO4 in the final solution?

Discussion

40.	how to find oxidation number of "Ba" in "BaO2" and "Si" in "SiO2"..... What would be its answer???
Answer» how to find oxidation number of "Ba" in "BaO2" and "Si" in "SiO2"..... What would be its answer???

Discussion

41.	The Van’t Hoff factor for 0.1M BaCl2 is 2.74. The percentage dissociation of the salt is
Answer» The Van’t Hoff factor for 0.1M $B a C l_{2}$ is 2.74. The percentage dissociation of the salt is

Discussion

42.	Which of the following graphs represents the radial charge density for the electron of outer most sub shell of Cu2+?
Answer» Which of the following graphs represents the radial charge density for the electron of outer most sub shell of $C u^{2 +}$ ?

Discussion

43.	Which of the following H-bonds is expected to have maximum strength?
Answer» Which of the following H-bonds is expected to have maximum strength?

Discussion

44.	Vapour pressure of pure benzene is 119 torr and of toluene is 37.0 torr at the same temperature. Then mole fraction of toluene in vapour phase which is in equilibrium with a solution of benzene and toluene having a mole fraction of toluene 0.50, will be:
Answer» Vapour pressure of pure benzene is $119 torr$ and of toluene is $37.0 torr$ at the same temperature. Then mole fraction of toluene in vapour phase which is in equilibrium with a solution of benzene and toluene having a mole fraction of toluene $0.50,$ will be:

Discussion

45.	According to Kohlrausch law, the limiting value of molar conductivity of an electrolyte Fe2(SO4)3 is given by:
Answer» According to Kohlrausch law, the limiting value of molar conductivity of an electrolyte $F e_{2} (S O_{4})_{3}$ is given by:

Discussion

46.	Which of the following gases has the highest average speed at 400 K? (Molar masses of U=238g/mol, S=32g/mol and F=19g/mol
Answer» Which of the following gases has the highest average speed at $400 K$ ? (Molar masses of $U = 238 g / m o l$ , $S = 32 g / m o l$ and $F = 19 g / m o l$

Discussion

47.	The value of KP is 1×10−3 atm−1 at 25 ∘C for the reaction 2NO(g)+Cl2(g)⇌2NOCl(g). A flask contains NO at 0.02 atm and at 25 ∘C. The mole of Cl2 that must be added if 1% of the NO is to be converted to NOCl at equilibrium is x×10−5. The volume of the flask is such that 0.2 mole of gas produces 1 atm pressure at 25 ∘C (Ignore probable association of NO to N2O2). Find the value of x.(Given: 1(99)2≈1.02×10−4)
Answer» The value of $K_{P}$ is $1 \times 10^{- 3} {atm}^{- 1}$ at $25^{\circ} C$ for the reaction $2 N O (g) + C l_{2} (g) ⇌ 2 N O C l (g) .$ A flask contains $N O$ at $0.02 atm$ and at $25^{\circ} C$ . The mole of $C l_{2}$ that must be added if $1 %$ of the $N O$ is to be converted to $N O C l$ at equilibrium is $x \times 10^{- 5}$ . The volume of the flask is such that $0.2$ mole of gas produces $1 atm$ pressure at $25^{\circ} C$ (Ignore probable association of $N O$ to $N_{2} O_{2}$ ). Find the value of $x$ . (Given: $\frac{1}{(99)^{2}} \approx 1.02 \times 10^{- 4}$ )

Discussion

48.	Predict the shift in equilibrium that will occur for each of the following processes when the volume is decreased. 1. P4(s)+6Cl2(g)⇌4PCl3(g) 2. PCl3(g)+Cl2(g)⇌PCl5(g) 3. PCl3(g)+3NH3(g)⇌P(NH2)3(g)+3HCl(g)
Answer» Predict the shift in equilibrium that will occur for each of the following processes when the volume is decreased. $1. P_{4} (s) + 6 C l_{2} (g) ⇌ 4 P C l_{3} (g)$ $2. P C l_{3} (g) + C l_{2} (g) ⇌ P C l_{5} (g)$ $3. P C l_{3} (g) + 3 N H_{3} (g) ⇌ P (N H_{2})_{3} (g) + 3 H C l (g)$

Discussion

49.	31. In normal spinel structure there is a closed pack of array O2- ions.the trivalent cations are present in?
Answer» 31. In normal spinel structure there is a closed pack of array O2- ions.the trivalent cations are present in?

Discussion

50.	Is triclinic crystal system included under Bravias Lattices?
Answer» Is triclinic crystal system included under Bravias Lattices?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The nearest distance between tetrahedral void and maximum distance between tetrahedral void are respectively

Calculate Δr S⊗sys for the following reaction at 373 K: CO(g) + H2O(g) → CO2(g) + H2(g) ΔrH⊗ = −4.1 × 104 J, Δr S⊗univ = 56J/K

The main product obtained in the reaction of 2-butene with N-bromosuccinimide in presene of light is

Substances which lower the body temperature are called:

The arrangement of spheres present in hexagonal close packing is:

The major product (x) of the following reaction is:

What is the order of acidic strength of H3PO4,H3PO3,H3PO2?

In the following reaction: The major product is:

The threshold frequency for the ejection of an electron from a metal is equal to that of a photon corresponding to the last line of Balmer series of the hydrogen spectrum. Find the stopping potential (in volt) when photons corresponding to the last line of Lyman series fall on the metal.

29.meaning of oxidising agent

What makes an eyelash/eyelid or hairs at other parts(armpits, pubic hairs) thicker than those on the head?

The ionization constant of ammonium hydroxide is 1.77×10−5 at 298 K. Hydrolysis constant of ammonium chloride is:

Oxidation state of Cl in ClO2 is?

The emf of the cell reaction,Zn(s)+Cu2+(aq.)→Zn2+(aq.)+Cu(s)is 1.1V. If enthalpy of the reaction is −216.7kJmol−1, calculate the entropy change for the reaction(in J/Kmole)

Of the following 0.10m aqueous solutions. which one will exhibit the largest freezing point depression?

Potassium crystallizes in a body centred cubic lattice. What is the approximate number of unit cells in 4.0 g of potassium? Atomic mass of potassium = 39

The maximum kinetic energy of the photoelectrons ejected from a metal when it is irradiated with a radiation of frequency 2×1014s−1 is 6.63×10−20J. The thereshold frequency of the metal is:

43.The maximum number of electrons in an atom which can have n=4 is?

92.Coordination number in ferrocene

In a cubic unit cell, seven of the eight corners are occupied by atoms A and centres of faces are occupied by atoms B. Total number of atoms in the general formula of the compound is:

If 100 ml of 1 M H2SO4 solution is mixed with 100 ml of 9.8% (w/w) H2SO4 solution (d=1 g/ml) then:

14. Relative lowering of vapour pressure produced by dissolving 71.5g of a substance in 0.1000g of water is 0.00713.the molecular weight of the substance willl be

1.84 g mixture of CaCO_3 and MgCO_3 was heated to cons†an t weight till 0.96 g residue formed. %(by mass) of MgCO_3 in sample was

What is the solubility of Al(OH)3(Ksp=1×10−33) in a buffer solution of pH=4?

What are azeotropes

There is small hole in a hollow sphere . The water enters in it when it is taken to a depth of 40cm under water . The surface tension of water is 0.07N/m. Find the diameter of hole

Consider the thermodynamic data at 25oC.MoleculeΔHof ( kJ/mol)CO2(g)xH2O(l)yCH4(g)zThe heat of combustion of CH4(g) in kJ/mol is

CaC2H2O−−→ACu2Cl2−−−−−→NH4OHB. Incorrect statement is

Which one of the following will give racemised product in C2H5OH ?

Is it possible to photograph virtual image?

How to calculate total number of nodes and nodal planes in a structure of hybrid orbital?

9. Assuming complete ionization same no.of moles of which of the following compound will require least amount of acidified KMnO4 for complete oxidation 1.FeC2O4 2.Fe(NO2)2 3.FeSO4 4.FeSO3

Calculate the equilibrium constant Kp for the reaction C(s)+CO2(G)⇌2co(g) at 1300K from the following data C(s)+2H2O(g)⇌CO2(g)+2H2(g)Kp(1300K)=3.9atm H2(g)+CO2(g)⇌CO(g)+H2O(g)Kp(1300K)=0.7atm

In which of the following equilibria, the value of KP is less than KC

50. Did there is any way to know the charge on compound ion like OH etc.?

what is sharpness of resonance?

1g of oleum sample is diluted with water the solution required 54ml of 0.4 N NaOH for complete neutralisation . the % of free SO3 in the sample is ?

100ml of .3N HCL solution is mixed with 200ml of .6N H2SO4 solution what is the normality of H2SO4 in the final solution?

how to find oxidation number of "Ba" in "BaO2" and "Si" in "SiO2"..... What would be its answer???

The Van’t Hoff factor for 0.1M BaCl2 is 2.74. The percentage dissociation of the salt is

Which of the following graphs represents the radial charge density for the electron of outer most sub shell of Cu2+?

Which of the following H-bonds is expected to have maximum strength?

Vapour pressure of pure benzene is 119 torr and of toluene is 37.0 torr at the same temperature. Then mole fraction of toluene in vapour phase which is in equilibrium with a solution of benzene and toluene having a mole fraction of toluene 0.50, will be:

According to Kohlrausch law, the limiting value of molar conductivity of an electrolyte Fe2(SO4)3 is given by:

Which of the following gases has the highest average speed at 400 K? (Molar masses of U=238g/mol, S=32g/mol and F=19g/mol

Predict the shift in equilibrium that will occur for each of the following processes when the volume is decreased. 1. P4(s)+6Cl2(g)⇌4PCl3(g) 2. PCl3(g)+Cl2(g)⇌PCl5(g) 3. PCl3(g)+3NH3(g)⇌P(NH2)3(g)+3HCl(g)

31. In normal spinel structure there is a closed pack of array O2- ions.the trivalent cations are present in?

Is triclinic crystal system included under Bravias Lattices?