46295 + Interview Questions in Chemistry

1.	Which of these is incorrect and correct Explain with reasons 1. If there is conjugation between triple bond and double bond then pi-bonds of triple bond are in conjugation with double bond 2.antiaromatic compounds are unstable but resonance is present 3.NBS is specific reagent for allylic bromination 4.allylic bromination occurs through free radical intermidiates 5.the density of alkanes os lower than water
Answer» Which of these is incorrect and correct Explain with reasons 1. If there is conjugation between triple bond and double bond then pi-bonds of triple bond are in conjugation with double bond 2.antiaromatic compounds are unstable but resonance is present 3.NBS is specific reagent for allylic bromination 4.allylic bromination occurs through free radical intermidiates 5.the density of alkanes os lower than water

Discussion

2.	What is the hybridization of given compound and in the given compound one liagnd is strong field and another is weak ligand.
Answer» What is the hybridization of given compound and in the given compound one liagnd is strong field and another is weak ligand.

Discussion

3.	19. Solution of which of the following compounds does not give sulphide precipitate on passing H2S gas ? a)CuSO4 b)CdSO4 c) K3(Cu(CN)4) d)K2(Cd(CAN)4)
Answer» 19. Solution of which of the following compounds does not give sulphide precipitate on passing H2S gas ? a)CuSO4 b)CdSO4 c) K3(Cu(CN)4) d)K2(Cd(CAN)4)

Discussion

4.	Why does orbitals having maximum number of unpaired electrons have more stability ?
Answer» Why does orbitals having maximum number of unpaired electrons have more stability ?

Discussion

5.	81. Two compound is given in which one of the element has same mass . we have to find out ratio of other element in present in the two compound
Answer» 81. Two compound is given in which one of the element has same mass . we have to find out ratio of other element in present in the two compound

Discussion

6.	Why is it that in the case of alpha diketones, equilibrium lies almost completely towards keto form?
Answer» Why is it that in the case of alpha diketones, equilibrium lies almost completely towards keto form?

Discussion

7.	If glass is an example of Bose-Einstien condensate which is a super cooled liquid then why don't we sense it as cold instead normal temperature?
Answer» If glass is an example of Bose-Einstien condensate which is a super cooled liquid then why don't we sense it as cold instead normal temperature?

Discussion

8.	Calculate the solubility product of the sparingly soluble salt CaF2 from the following data:The molar ionic conductances (at infinite dilution) of Ca2+ and F− ions are 104×10−4 and 48×10−4Sm2mol−1respectively. The specific conductance of the saturated solution of CaF2 at room temperature is 4.25×10−3Sm−1 and the specific conductance of water used for preparing the solution is 2×10−4Sm−1.
Answer» Calculate the solubility product of the sparingly soluble salt $C a F_{2}$ from the following data: The molar ionic conductances (at infinite dilution) of $C a^{2 +}$ and $F^{-}$ ions are $104 \times 10^{- 4}$ and $48 \times 10^{- 4} S m^{2} m o l^{- 1}$ respectively. The specific conductance of the saturated solution of $C a F_{2}$ at room temperature is $4.25 \times 10^{- 3} S m^{- 1}$ and the specific conductance of water used for preparing the solution is $2 \times 10^{- 4} S m^{- 1}$ .

Discussion

9.	Aradioactive isotope has a half-life of Tyears. How long will it take theactivity to reduce to a) 3.125%, b) 1% of its original value?
Answer» A radioactive isotope has a half-life of T years. How long will it take the activity to reduce to a) 3.125%, b) 1% of its original value?

Discussion

10.	18. A:- CH3Cl has more dipole moment than CH3F R:-CH3CHO has more dipole moment than HCHO.
Answer» 18. A:- CH3Cl has more dipole moment than CH3F R:-CH3CHO has more dipole moment than HCHO.

Discussion

11.	What is CM
Answer» What is CM

Discussion

12.	Why is sodium kept immersed in kerosene oil?
Answer» Why is sodium kept immersed in kerosene oil?

Discussion

13.	The bond angle in (CH3)2S is close to:
Answer» The bond angle in $(C H_{3})_{2} S$ is close to:

Discussion

14.	Under similar conditions which of the following gases will diffuse four times as fast as oxygen.
Answer» Under similar conditions which of the following gases will diffuse four times as fast as oxygen.

Discussion

15.	Octane number is zero for
Answer» Octane number is zero for

Discussion

16.	Total number of lone pairs in XeOF4 is:
Answer» Total number of lone pairs in $X e O F_{4}$ is:

Discussion

17.	(i) Draw the geometrical isomers of complex [Co(en)2Cl2]+ . (ii) On the basis of crystal field theory, write the electronic configuration for d4 ion if Δ0>P. (iii) [NiCl4]2− is paramagnetic, while [Ni(CO)4] is diamagnetic, though both are tetrahedral. Why? (Atomic number of Ni = 28)
Answer» (i) Draw the geometrical isomers of complex $[C o (e n)_{2} C l_{2}]^{+}$ . (ii) On the basis of crystal field theory, write the electronic configuration for d⁴ ion if $Δ_{0} > P$ . (iii) $[N i C l_{4}]^{2 -}$ is paramagnetic, while $[N i (C O)_{4}]$ is diamagnetic, though both are tetrahedral. Why? (Atomic number of Ni = 28)

17.

(i) Draw the geometrical isomers of complex [Co(en)2Cl2]+ . (ii) On the basis of crystal field theory, write the electronic configuration for d4 ion if Δ0>P. (iii) [NiCl4]2− is paramagnetic, while [Ni(CO)4] is diamagnetic, though both are tetrahedral. Why? (Atomic number of Ni = 28)

Answer»

(i) Draw the geometrical isomers of complex $[C o (e n)_{2} C l_{2}]^{+}$ .

(ii) On the basis of crystal field theory, write the electronic configuration for d⁴ ion if $Δ_{0} > P$ .

(iii) $[N i C l_{4}]^{2 -}$ is paramagnetic, while $[N i (C O)_{4}]$ is diamagnetic, though both are tetrahedral. Why? (Atomic number of Ni = 28)

Discussion

18.	Arrange the compounds in increasing order of basicity.
Answer» Arrange the compounds in increasing order of basicity.

Discussion

19.	For a nucleus having mass number 64, its radius of nucleus is -
Answer» For a nucleus having mass number $64$ , its radius of nucleus is -

Discussion

20.	70. For the reaction A + B -> product it is observed that a) on doubling the initial concentration of A only the rate of reaction is also doubled and b) on doubling the initial concentration of both A and B there is a change by a factor of 8 in rate of the reaction The rate of this reaction is given by
Answer» 70. For the reaction A + B -> product it is observed that a) on doubling the initial concentration of A only the rate of reaction is also doubled and b) on doubling the initial concentration of both A and B there is a change by a factor of 8 in rate of the reaction The rate of this reaction is given by

Discussion

21.	Hydration energies of M+ and Cl– are –499 and –382 kJ mole–1. If lattice energy is 840 kJmole–1, for MCl(s) the heat of solution of MCl is
Answer» Hydration energies of M+ and Cl– are –499 and –382 kJ mole–1. If lattice energy is 840 kJmole–1, for MCl(s) the heat of solution of MCl is

Discussion

22.	32. Nitobenzene is coverted into aniline under the conditions : electroreduction and in weakly acidic medium. N factor of nitrobenzene in this process is 1. 3 2. 6 3. 2 4. 4
Answer» 32. Nitobenzene is coverted into aniline under the conditions : electroreduction and in weakly acidic medium. N factor of nitrobenzene in this process is 1. 3 2. 6 3. 2 4. 4

Discussion

23.	an atomic solid has hexagonal arrangement of unit cell with height of hexagon as x. the radius of atom in terms of x is .
Answer» an atomic solid has hexagonal arrangement of unit cell with height of hexagon as x. the radius of atom in terms of x is .

Discussion

24.	The number of occupied orbitals with magneticquantum number equal to zero in Ca and Nrespectively are(2) 3, 6(4) 10, 5(3) 8, 3
Answer» The number of occupied orbitals with magneticquantum number equal to zero in Ca and Nrespectively are(2) 3, 6(4) 10, 5(3) 8, 3

Discussion

25.	Molarity of 29%(w/w) H2SO4 solution whose density is 1.22 g/ml, is ?
Answer» Molarity of 29%(w/w) H2SO4 solution whose density is 1.22 g/ml, is ?

Discussion

26.	difference between isotropic and anisotropic.
Answer» difference between isotropic and anisotropic.

Discussion

27.	The most stable carbocation among the following is:
Answer» The most stable carbocation among the following is:

Discussion

28.	Electromagnetic radiation of wavelength 242 nm is just sufficient to ionise the sodium atom. Calculate the ionisation energy of sodium in kJ mol–1.
Answer» Electromagnetic radiation of wavelength 242 nm is just sufficient to ionise the sodium atom. Calculate the ionisation energy of sodium in kJ $m o l^{- 1}$ .

Discussion

29.	16. Calculate molar conductivities for NH4OH that values of molar conductivity for Ba(OH)2,BaCl2&NH4Cl as 523.28 ,280 &129.8 S cm2 per mole explain with proper solution
Answer» 16. Calculate molar conductivities for NH4OH that values of molar conductivity for Ba(OH)2,BaCl2&NH4Cl as 523.28 ,280 &129.8 S cm2 per mole explain with proper solution

Discussion

30.	The size of the hydrogen atom is about 0.4Å. Calculate the total volume(in m³) of a mole of hydrogen atom?
Answer» The size of the hydrogen atom is about 0.4Å. Calculate the total volume(in m³) of a mole of hydrogen atom?

Discussion

31.	Conformation of butane is :
Answer» Conformation of butane is :

Discussion

32.	Question 35 Colligative properties are observed when .......... . (a) a non-volatile solid is dissolved in a volatile liquid (b) a non-volatile liquid is dissolved in another volatile liquid (c) a gas is dissolved in non-volatile liquid (d) a volatile liquid is dissolved in another volatile liquid
Answer» Question 35 Colligative properties are observed when .......... . (a) a non-volatile solid is dissolved in a volatile liquid (b) a non-volatile liquid is dissolved in another volatile liquid (c) a gas is dissolved in non-volatile liquid (d) a volatile liquid is dissolved in another volatile liquid

Discussion

33.	Which of the following does not obey the octet or duplet rule? (i) H2O (ii) BF3 (iii) PCl5(iv) CO2 (v) NH3
Answer» Which of the following does not obey the octet or duplet rule? $(i) H_{2} O (i i) B F_{3} (i i i) P C l_{5} (i v) C O_{2} (v) N H_{3}$

Discussion

34.	3 moles of NO gas is expanded by adiabatic reversible process from 303 K to 378 K. What is the work done by the gas ?(R=8.3 J K−1 mol−1, γ=75)
Answer» $3$ moles of NO gas is expanded by adiabatic reversible process from $303 K t o 378 K .$ What is the work done by the gas ? $(R = 8.3 J K^{- 1} m o l^{- 1}, γ = \frac{7}{5})$

Discussion

35.	Afirst order reaction takes 40 min for 30% decomposition. Calculatet1/2.
Answer» A first order reaction takes 40 min for 30% decomposition. Calculate t_1/2.

Discussion

36.	In a Rankine cycle, the enthalpies at turbine entry and outlet are 3159kJ/kg and 2187kJ/kg, respectively. If the specific pump work is 2kJ/kg, the specific steam consumption (in kg/kWh) of the cycle based on net output is3.711
Answer» In a Rankine cycle, the enthalpies at turbine entry and outlet are $3159 k J / k g$ and $2187 k J / k g,$ respectively. If the specific pump work is $2 k J / k g$ , the specific steam consumption (in $k g / k W h$ ) of the cycle based on net output is 3.711

Discussion

37.	Name a polymer which is an ester
Answer» Name a polymer which is an ester

Discussion

38.	Among the following the number of reaction(s) that produce(s) benzaldehyde is :(a)(b)(c)(d)(e)(f)(g)
Answer» Among the following the number of reaction(s) that produce(s) benzaldehyde is : (a) (b) (c) (d) (e) (f) (g)

Discussion

39.	Which of the following relation is correct with respect to Ist and 2nd Ionization energy of Sodium and Magnesium?
Answer» Which of the following relation is correct with respect to $I^{s t}$ and $2^{n d}$ Ionization energy of Sodium and Magnesium?

Discussion

40.	Two moles of an ideal gas is expanded isothermally and reversibly from 1L to 10L .The enthalpy change (in kg )for he process is1]11.42]-11.43]04]4.8
Answer» Two moles of an ideal gas is expanded isothermally and reversibly from 1L to 10L . The enthalpy change (in kg )for he process is 1]11.4 2]-11.4 3]0 4]4.8

Discussion

41.	Among the following, the number of aromatic compound(s) is
Answer» Among the following, the number of aromatic compound(s) is

41.

Among the following, the number of aromatic compound(s) is

Answer»

Among the following, the number of aromatic compound(s) is

Discussion

42.	Polyphosphates are used as water softening agents because they :
Answer» Polyphosphates are used as water softening agents because they :

Discussion

43.	The normality of 1.11 g of CaCl2 dissolved in 250 mL solution is .
Answer» The normality of $1.11 g$ of $C a C l_{2}$ dissolved in $250 m L$ solution is .

Discussion

44.	From a sample of 196g of H2SO4 if all the oxygen and hydrogen atoms are removed and converted to H2O. Find the max. mole of H2O formed.
Answer» From a sample of 196g of H2SO4 if all the oxygen and hydrogen atoms are removed and converted to H2O. Find the max. mole of H2O formed.

Discussion

45.	Negative deviation from ideal behaviour is due to fact that :
Answer» Negative deviation from ideal behaviour is due to fact that :

Discussion

46.	Consider the following reaction between zinc and oxygen and choose the correctoptions out of the options given below :2 Zn (s) + O2 (g) → 2 ZnO (s) ; ∆H = – 693.8 kJ mol–1(i) The enthalpy of two moles of ZnO is less than the total enthalpy of twomoles of Zn and one mole of oxygen by 693.8 kJ.(ii) The enthalpy of two moles of ZnO is more than the total enthalpy of twomoles of Zn and one mole of oxygen by 693.8 kJ.(Explain between 1 and 2)
Answer» Consider the following reaction between zinc and oxygen and choose the correct options out of the options given below : 2 Zn (s) + O2 (g) → 2 ZnO (s) ; ∆H = – 693.8 kJ mol–1 (i) The enthalpy of two moles of ZnO is less than the total enthalpy of two moles of Zn and one mole of oxygen by 693.8 kJ. (ii) The enthalpy of two moles of ZnO is more than the total enthalpy of two moles of Zn and one mole of oxygen by 693.8 kJ. (Explain between 1 and 2)

Discussion

47.	34. In the presence of external magnetic field, f sub shell is (1) 5 fold degenerate (2) 3 fold degenerate (3) 7 fold degenerate (4) Non degenerate
Answer» 34. In the presence of external magnetic field, f sub shell is (1) 5 fold degenerate (2) 3 fold degenerate (3) 7 fold degenerate (4) Non degenerate

Discussion

48.	What is the oxidation state of oxygen in CrO5 ?
Answer» What is the oxidation state of oxygen in CrO5 ?

Discussion

49.	Define the nodal planes for the following orbitals dxy, dyz, dzx
Answer» Define the nodal planes for the following orbitals dxy, dyz, dzx

Discussion

50.	If the lattice parameter for a crystalline structure is3.6 A, then the atomic radius in fcc crystal is 1.27A 1.81A 2.10A 2.92
Answer» If the lattice parameter for a crystalline structure is3.6 A, then the atomic radius in fcc crystal is 1.27A 1.81A 2.10A 2.92

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the hybridization of given compound and in the given compound one liagnd is strong field and another is weak ligand.

19. Solution of which of the following compounds does not give sulphide precipitate on passing H2S gas ? a)CuSO4 b)CdSO4 c) K3(Cu(CN)4) d)K2(Cd(CAN)4)

Why does orbitals having maximum number of unpaired electrons have more stability ?

81. Two compound is given in which one of the element has same mass . we have to find out ratio of other element in present in the two compound

Why is it that in the case of alpha diketones, equilibrium lies almost completely towards keto form?

If glass is an example of Bose-Einstien condensate which is a super cooled liquid then why don't we sense it as cold instead normal temperature?

Aradioactive isotope has a half-life of Tyears. How long will it take theactivity to reduce to a) 3.125%, b) 1% of its original value?

18. A:- CH3Cl has more dipole moment than CH3F R:-CH3CHO has more dipole moment than HCHO.

What is CM

Why is sodium kept immersed in kerosene oil?

The bond angle in (CH3)2S is close to:

Under similar conditions which of the following gases will diffuse four times as fast as oxygen.

Octane number is zero for

Total number of lone pairs in XeOF4 is:

(i) Draw the geometrical isomers of complex [Co(en)2Cl2]+ . (ii) On the basis of crystal field theory, write the electronic configuration for d4 ion if Δ0&gt;P. (iii) [NiCl4]2− is paramagnetic, while [Ni(CO)4] is diamagnetic, though both are tetrahedral. Why? (Atomic number of Ni = 28)

Arrange the compounds in increasing order of basicity.

For a nucleus having mass number 64, its radius of nucleus is -

Hydration energies of M+ and Cl– are –499 and –382 kJ mole–1. If lattice energy is 840 kJmole–1, for MCl(s) the heat of solution of MCl is

32. Nitobenzene is coverted into aniline under the conditions : electroreduction and in weakly acidic medium. N factor of nitrobenzene in this process is 1. 3 2. 6 3. 2 4. 4

an atomic solid has hexagonal arrangement of unit cell with height of hexagon as x. the radius of atom in terms of x is .

The number of occupied orbitals with magneticquantum number equal to zero in Ca and Nrespectively are(2) 3, 6(4) 10, 5(3) 8, 3

Molarity of 29%(w/w) H2SO4 solution whose density is 1.22 g/ml, is ?

difference between isotropic and anisotropic.

The most stable carbocation among the following is:

Electromagnetic radiation of wavelength 242 nm is just sufficient to ionise the sodium atom. Calculate the ionisation energy of sodium in kJ mol–1.

16. Calculate molar conductivities for NH4OH that values of molar conductivity for Ba(OH)2,BaCl2&NH4Cl as 523.28 ,280 &129.8 S cm2 per mole explain with proper solution

The size of the hydrogen atom is about 0.4Å. Calculate the total volume(in m³) of a mole of hydrogen atom?

Conformation of butane is :

Question 35 Colligative properties are observed when .......... . (a) a non-volatile solid is dissolved in a volatile liquid (b) a non-volatile liquid is dissolved in another volatile liquid (c) a gas is dissolved in non-volatile liquid (d) a volatile liquid is dissolved in another volatile liquid

Which of the following does not obey the octet or duplet rule? (i) H2O (ii) BF3 (iii) PCl5(iv) CO2 (v) NH3

3 moles of NO gas is expanded by adiabatic reversible process from 303 K to 378 K. What is the work done by the gas ?(R=8.3 J K−1 mol−1, γ=75)

Afirst order reaction takes 40 min for 30% decomposition. Calculatet1/2.

In a Rankine cycle, the enthalpies at turbine entry and outlet are 3159kJ/kg and 2187kJ/kg, respectively. If the specific pump work is 2kJ/kg, the specific steam consumption (in kg/kWh) of the cycle based on net output is3.711

Name a polymer which is an ester

Among the following the number of reaction(s) that produce(s) benzaldehyde is :(a)(b)(c)(d)(e)(f)(g)

Which of the following relation is correct with respect to Ist and 2nd Ionization energy of Sodium and Magnesium?

Two moles of an ideal gas is expanded isothermally and reversibly from 1L to 10L .The enthalpy change (in kg )for he process is1]11.42]-11.43]04]4.8

Among the following, the number of aromatic compound(s) is

Polyphosphates are used as water softening agents because they :

The normality of 1.11 g of CaCl2 dissolved in 250 mL solution is .

From a sample of 196g of H2SO4 if all the oxygen and hydrogen atoms are removed and converted to H2O. Find the max. mole of H2O formed.

Negative deviation from ideal behaviour is due to fact that :

34. In the presence of external magnetic field, f sub shell is (1) 5 fold degenerate (2) 3 fold degenerate (3) 7 fold degenerate (4) Non degenerate

What is the oxidation state of oxygen in CrO5 ?

Define the nodal planes for the following orbitals dxy, dyz, dzx

If the lattice parameter for a crystalline structure is3.6 A, then the atomic radius in fcc crystal is 1.27A 1.81A 2.10A 2.92

(i) Draw the geometrical isomers of complex [Co(en)2Cl2]+ . (ii) On the basis of crystal field theory, write the electronic configuration for d4 ion if Δ0>P. (iii) [NiCl4]2− is paramagnetic, while [Ni(CO)4] is diamagnetic, though both are tetrahedral. Why? (Atomic number of Ni = 28)