46295 + Interview Questions in Chemistry

1.	In pyrrole the electron density is maximum on
Answer» In pyrrole the electron density is maximum on

1.

In pyrrole the electron density is maximum on

Answer»

In pyrrole

the electron density is maximum on

2.	Find the molarity of a 15% (w/w) H2SO4 solution. (Density of the solution is 1.10 g/mL)
Answer» Find the molarity of a 15% (w/w) $H_{2} S O_{4}$ solution. (Density of the solution is 1.10 g/mL)

Discussion

3.	In nitration of benzene
Answer» In nitration of benzene

Discussion

4.	Which of the following compounds has the highest value of pKa?
Answer» Which of the following compounds has the highest value of $p K_{a}$ ?

Discussion

5.	If 1gram of sulphur dioxide contains x molecules, what will be the number of molecules in 1gram of methane?
Answer» If 1gram of sulphur dioxide contains x molecules, what will be the number of molecules in 1gram of methane?

Discussion

6.	Sir can u please give me a list of metallurgical processes and elements or list of road related to them
Answer» Sir can u please give me a list of metallurgical processes and elements or list of road related to them

Discussion

7.	For the reaction 2NH3(g)⇌N2(g)+3H2(g),ΔH=93.6 kJ mol−1. Which of the following facts does not hold well?
Answer» For the reaction $2 N H_{3} (g) ⇌ N_{2} (g) + 3 H_{2} (g), Δ H = 93.6 k J m o l^{- 1}$ . Which of the following facts does not hold well?

Discussion

8.	Total number of electron in phosphorus which have zero value of at least one quantum number.
Answer» Total number of electron in phosphorus which have zero value of at least one quantum number.

Discussion

9.	The most stable carbocation is
Answer» The most stable carbocation is

Discussion

10.	In the depression of the freezing point experiment it is found that
Answer» In the depression of the freezing point experiment it is found that

Discussion

11.	For the reaction A+2B⇌C+D, the equilibrium constant is 1.0×108. Calculate the equilibrium concentration of A if 1.0 mole of A and 3.0 mole of B are placed in 1L flask and allowed to attain the equilibrium ?
Answer» For the reaction $A + 2 B ⇌ C + D,$ the equilibrium constant is $1.0 \times 10^{8}$ . Calculate the equilibrium concentration of A if 1.0 mole of A and 3.0 mole of B are placed in 1L flask and allowed to attain the equilibrium ?

Discussion

12.	At temperature T, a compound AB2(g) dissociates according to the reaction 2AB2(g)⇌2AB(g)+B2(g) with degree of dissociation α (which is very small). The expression for KP in terms of α and the total pressure, PT is:
Answer» At temperature $T$ , a compound $A B_{2} (g)$ dissociates according to the reaction $2 A B_{2} (g) ⇌ 2 A B (g) + B_{2} (g)$ with degree of dissociation $α$ (which is very small). The expression for $K_{P}$ in terms of $α$ and the total pressure, $P_{T}$ is:

Discussion

13.	Electrolysis of NaCl solution with inert electrodes for a certain period of time gave 600 cm3 of 1.0 M NaOH in the electrolytic cell. During the same period, 31.80 g of copper was deposited in a copper voltameter in series with the electrolytic cell. What is the percent current efficiency in the electrolytic cell? (At. Wt. of Cu = 63.6)___
Answer» Electrolysis of $N a C l$ solution with inert electrodes for a certain period of time gave 600 $c m^{3}$ of 1.0 M $N a O H$ in the electrolytic cell. During the same period, 31.80 g of copper was deposited in a copper voltameter in series with the electrolytic cell. What is the percent current efficiency in the electrolytic cell? (At. Wt. of Cu = 63.6)___

Discussion

14.	One mole of an ideal gas is taken from a to b along two paths denoted by the solid and the dashed lines as shown in the graph below. It the work done along the solid line path is Ws and that along the dotted line path is WdWs is ___
Answer» One mole of an ideal gas is taken from a to b along two paths denoted by the solid and the dashed lines as shown in the graph below. It the work done along the solid line path is $W_{s}$ and that along the dotted line path is $\frac{W_{d}}{W_{s}}$ is ___

Discussion

15.	A good example of organic fertilizer which improves phosphorus uptake is
Answer» A good example of organic fertilizer which improves phosphorus uptake is

Discussion

16.	The EAN of metal atoms in [Fe(CO)2(NO+)2] and Co2(CO)8 respectively are: (correct answer +2, wrong answer -0.5)
Answer» The EAN of metal atoms in $[F e (C O)_{2} (N O^{+})_{2}]$ and $C o_{2} (C O)_{8}$ respectively are: (correct answer +2, wrong answer -0.5)

Discussion

17.	B2H6 reacts with O2 and H2O respectvely to form:
Answer» $B_{2} H_{6}$ reacts with $O_{2}$ and $H_{2} O$ respectvely to form:

Discussion

18.	The volume of a given mass of a gas is 300 ml, measured at 798 mm pressure. What will be the volume, if pressure is reduced to 760 mm at constant temperature?
Answer» The volume of a given mass of a gas is 300 ml, measured at 798 mm pressure. What will be the volume, if pressure is reduced to 760 mm at constant temperature?

Discussion

19.	Kp is how many times equal to Kc for the given reaction? N2(g)+3H2(g)⇌2NH3(g)
Answer» $K_{p}$ is how many times equal to $K_{c}$ for the given reaction? $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)$

Discussion

20.	The boiling point of a solution of 0.105 gm of a substance in 15.84 gram of ether was found to be 100°C higher than that of pure ether. What is the molecular weight of the substance [Molecular elevation constant of ether per 100 g = 21.6]
Answer» The boiling point of a solution of 0.105 gm of a substance in 15.84 gram of ether was found to be 100°C higher than that of pure ether. What is the molecular weight of the substance [Molecular elevation constant of ether per 100 g = 21.6]

Discussion

21.	Which of the following compounds is not colored yellow?
Answer» Which of the following compounds is not colored yellow?

Discussion

22.	Which one of the following ions has an electronic configuration of [Ar]3d6 ? (Atomic Number: Mn =25,Fe=26,Co = 27,Ni = 28)
Answer» Which one of the following ions has an electronic configuration of $[A r] 3 d^{6}$ ? $(A t o m i c N u m b e r : M n = 25, F e = 26, C o = 27, N i = 28)$

Discussion

23.	If 21 g of NaHCO3 is added to 15 g of CH3COOH solution, the residue is found to weigh 25 g. what is the mass of CO2 is released in the reaction?
Answer» If $21 g$ of $N a H C O_{3}$ is added to $15 g$ of $C H_{3} C O O H$ solution, the residue is found to weigh $25 g$ . what is the mass of $C O_{2}$ is released in the reaction?

Discussion

24.	avogadro's law
Answer» avogadro's law

Discussion

25.	Which of the following carbocation is most stable? (a) (CH3)3C.+CH2 (b) (CH3)3+C (c) CH3CH2+CH2 (d) CH3+CH CH2CH3
Answer» Which of the following carbocation is most stable? (a) $(C H_{3})_{3} C . + C H_{2}$ (b) $(C H_{3})_{3} + C$ (c) $C H_{3} C H_{2} + C H_{2}$ (d) $C H_{3} + C H C H_{2} C H_{3}$

Discussion

26.	For the gas phase reaction C2H4+H2⇌C2H6, DH = -32.7kcal carried out in a vessel, the equilibrium concentration of C2H4 can be increased by -
Answer» For the gas phase reaction $C_{2} H_{4} + H_{2} ⇌ C_{2} H_{6},$ DH = -32.7kcal carried out in a vessel, the equilibrium concentration of $C_{2} H_{4}$ can be increased by -

Discussion

27.	Consider the reactions: 6CO2(g)+6H2O(l)→C6H12O6(aq)+6O2(g) Why it is more appropriate to write these reactions as: 6CO2(g)+12H2O(l)→C6H12O6(aq)+6H2O(l)+6O2(g) Also suggest a technique to investigate the path of the above (a) and (b) redox reactions. O3(g)+H2O2(l)→H2O(l)+2O2(g) Why it is more appropriate to write these reactions as: O3(g)+H2O2(l)→H2O(l)+O2(g)+O2(g) Also suggest a technique to investigate the path of the above (a) and (b) redox reactions.
Answer» Consider the reactions: $6 C O_{2} (g) + 6 H_{2} O (l) \to C_{6} H_{12} O 6 (a q) + 6 O_{2} (g)$ Why it is more appropriate to write these reactions as: $6 C O_{2} (g) + 12 H_{2} O (l) \to C_{6} H_{12} O_{6} (a q) + 6 H_{2} O (l) + 6 O_{2} (g)$ Also suggest a technique to investigate the path of the above (a) and (b) redox reactions. $O_{3} (g) + H_{2} O_{2} (l) \to H_{2} O (l) + 2 O_{2} (g)$ Why it is more appropriate to write these reactions as: $O_{3} (g) + H_{2} O_{2} (l) \to H_{2} O (l) + O_{2} (g) + O_{2} (g)$ Also suggest a technique to investigate the path of the above (a) and (b) redox reactions.

27.

Consider the reactions: 6CO2(g)+6H2O(l)→C6H12O6(aq)+6O2(g) Why it is more appropriate to write these reactions as: 6CO2(g)+12H2O(l)→C6H12O6(aq)+6H2O(l)+6O2(g) Also suggest a technique to investigate the path of the above (a) and (b) redox reactions. O3(g)+H2O2(l)→H2O(l)+2O2(g) Why it is more appropriate to write these reactions as: O3(g)+H2O2(l)→H2O(l)+O2(g)+O2(g) Also suggest a technique to investigate the path of the above (a) and (b) redox reactions.

Answer»

Consider the reactions:
$6 C O_{2} (g) + 6 H_{2} O (l) \to C_{6} H_{12} O 6 (a q) + 6 O_{2} (g)$
Why it is more appropriate to write these reactions as:
$6 C O_{2} (g) + 12 H_{2} O (l) \to C_{6} H_{12} O_{6} (a q) + 6 H_{2} O (l) + 6 O_{2} (g)$
Also suggest a technique to investigate the path of the above (a) and (b) redox reactions.

$O_{3} (g) + H_{2} O_{2} (l) \to H_{2} O (l) + 2 O_{2} (g)$
Why it is more appropriate to write these reactions as:
$O_{3} (g) + H_{2} O_{2} (l) \to H_{2} O (l) + O_{2} (g) + O_{2} (g)$
Also suggest a technique to investigate the path of the above (a) and (b) redox reactions.

Discussion

28.	The number of π bonds present in 2 - Ethyl anthraquinone is
Answer» The number of $π$ bonds present in 2 - Ethyl anthraquinone is

Discussion

29.	In kinetic theory of gases, a molecule of mass m of an ideal gas collides with a wall of vessel with velocity V. The change in the linear momentum of the molecule is
Answer» In kinetic theory of gases, a molecule of mass m of an ideal gas collides with a wall of vessel with velocity V. The change in the linear momentum of the molecule is

29.

In kinetic theory of gases, a molecule of mass m of an ideal gas collides with a wall of vessel with velocity V. The change in the linear momentum of the molecule is

Answer»

In kinetic theory of gases, a molecule of mass m of an ideal gas collides with a wall of vessel with velocity V. The change in the linear momentum of the molecule is

Discussion

30.	The coinage metals are
Answer» The coinage metals are

Discussion

31.	The driving force for the completion of Claisen condensation between ethyl acetate and sodium ethoxide to ethyl acetoacetate is
Answer» The driving force for the completion of Claisen condensation between ethyl acetate and sodium ethoxide to ethyl acetoacetate is

Discussion

32.	n - butane can be obtained from I) n - butyl chloride / Zn + HClII)sec. butyl iodide / Zn - Cu couple III) Sodium n - valerate / NaOH + CaOIV) Sodium propionate / Kolbe's electrolysis
Answer» n - butane can be obtained from I) n - butyl chloride / Zn + HClII)sec. butyl iodide / Zn - Cu couple III) Sodium n - valerate / NaOH + CaOIV) Sodium propionate / Kolbe's electrolysis

32.

n - butane can be obtained from I) n - butyl chloride / Zn + HClII)sec. butyl iodide / Zn - Cu couple III) Sodium n - valerate / NaOH + CaOIV) Sodium propionate / Kolbe's electrolysis

Answer»

n - butane can be obtained from

I) n - butyl chloride / Zn + HClII)sec. butyl iodide / Zn - Cu couple

III) Sodium n - valerate / NaOH + CaOIV) Sodium propionate / Kolbe's electrolysis

Discussion

33.	Specify the coordination geometry around and hybridization of N and B-atoms in a 1:1 complex of BF3:
Answer» Specify the coordination geometry around and hybridization of N and B-atoms in a 1:1 complex of BF₃:

Discussion

34.	Would you expect the first ionization enthalpies for two isotopes of the same element to be the same or different? Justify your answer.
Answer» Would you expect the first ionization enthalpies for two isotopes of the same element to be the same or different? Justify your answer.

Discussion

35.	The energy of second Bohr orbit of the hydrogen atom is −328 kJ mol−1; hence the energy of fourth Bohr orbit would be
Answer» The energy of second Bohr orbit of the hydrogen atom is $- 328 {kJ mol}^{- 1}$ ; hence the energy of fourth Bohr orbit would be

Discussion

36.	Which of the following is true for a isobaric process?
Answer» Which of the following is true for a isobaric process?

Discussion

37.	Assertion (A): Solvay process is used for the preparation of NaHCO3 but not for KHCO3 Reason (R): Solubility of KHCO3 is more than NaHCO3 in water
Answer» Assertion (A): Solvay process is used for the preparation of $N a H C O_{3}$ but not for $K H C O_{3}$ Reason (R): Solubility of $K H C O_{3}$ is more than $N a H C O_{3}$ in water

37.

Assertion (A): Solvay process is used for the preparation of NaHCO3 but not for KHCO3 Reason (R): Solubility of KHCO3 is more than NaHCO3 in water

Answer»

Assertion (A): Solvay process is used for the preparation of $N a H C O_{3}$ but not for $K H C O_{3}$

Reason (R): Solubility of $K H C O_{3}$ is more than $N a H C O_{3}$ in water

Discussion

38.	In the above sequence X, Y and Z are
Answer» In the above sequence X, Y and Z are

Discussion

39.	Which of the following is more basic than aniline?
Answer» Which of the following is more basic than aniline?

Discussion

40.	Which of the following electrolytes is least effective in causing flocculation of ferric hydroxide sol [MNR 1991; UPSEAT 1999]
Answer» Which of the following electrolytes is least effective in causing flocculation of ferric hydroxide sol [MNR 1991; UPSEAT 1999]

40.

Which of the following electrolytes is least effective in causing flocculation of ferric hydroxide sol [MNR 1991; UPSEAT 1999]

Answer»

Which of the following electrolytes is least effective in causing flocculation of

ferric hydroxide sol

[MNR 1991; UPSEAT 1999]

Discussion

41.	What is the molarity of sulphuruc acid solution, that has a density of 1.84 gm/cc and contains 98% sulphuric acid by weight?
Answer» What is the molarity of sulphuruc acid solution, that has a density of 1.84 gm/cc and contains 98% sulphuric acid by weight?

Discussion

42.	Which of the following clotting factors are known as ‘Christmas factor’?
Answer» Which of the following clotting factors are known as ‘Christmas factor’?

Discussion

43.	(a) A 10% solution (by mass) of sucrose in water has a freezing point of 269.15 K. Calculate the freezing point of 10% glucose in water if the freezing point of pure water is 273.15 K. given: (Molar mass of sucrose = 342 g mol−1) (Molar mass of glucose = 180 g mol−1) (b) Define the following terms: (i) Molality (m) (ii) Abnormal molar mass.
Answer» (a) A $10 %$ solution (by mass) of sucrose in water has a freezing point of 269.15 K. Calculate the freezing point of $10 %$ glucose in water if the freezing point of pure water is 273.15 K. given: (Molar mass of sucrose = 342 g $m o l^{- 1}$ ) (Molar mass of glucose = 180 g $m o l^{- 1}$ ) (b) Define the following terms: (i) Molality (m) (ii) Abnormal molar mass.

Discussion

44.	Hybridization of central atom in NF3 is .
Answer» Hybridization of central atom in $N F_{3}$ is .

Discussion

45.	Column 1: Type of structure, Column 2: Co-ordination number of cation, Column 3: Co-ordination number of anion. Column 1Column 2Column 3(I)FCC(i)12(P)4(II)Anti-Flourite(ii)6(Q)12(III)BCC(iii)8(R)8(IV)Flourite(iv)4(S)6 The only correct combination for zinc blende is:
Answer» Column 1: Type of structure, Column 2: Co-ordination number of cation, Column 3: Co-ordination number of anion. $\begin{matrix} Column 1 & Column 2 & Column 3 (I) & FCC & (i) & 12 & (P) & 4 (II) & Anti-Flourite & (ii) & 6 & (Q) & 12 (III) & BCC & (iii) & 8 & (R) & 8 (IV) & Flourite & (iv) & 4 & (S) & 6 \end{matrix}$ The only correct combination for zinc blende is:

45.

Column 1: Type of structure, Column 2: Co-ordination number of cation, Column 3: Co-ordination number of anion. Column 1Column 2Column 3(I)FCC(i)12(P)4(II)Anti-Flourite(ii)6(Q)12(III)BCC(iii)8(R)8(IV)Flourite(iv)4(S)6 The only correct combination for zinc blende is:

Answer»

Column 1: Type of structure, Column 2: Co-ordination number of cation, Column 3: Co-ordination number of anion.

$\begin{matrix} Column 1 & Column 2 & Column 3 (I) & FCC & (i) & 12 & (P) & 4 (II) & Anti-Flourite & (ii) & 6 & (Q) & 12 (III) & BCC & (iii) & 8 & (R) & 8 (IV) & Flourite & (iv) & 4 & (S) & 6 \end{matrix}$

The only correct combination for zinc blende is:

Discussion

46.	Calculate the molarity of a solution having 3.42 g sucrose in 500 mL solution.
Answer» Calculate the molarity of a solution having 3.42 g sucrose in 500 mL solution.

Discussion

47.	Consider the reactions given below. On the basis of these reactions find out which of the algebraic relationship given in options (a) to (d) is correct? 1. C(g)+4H(g)→CH4(g); ΔrH=x kJ mol−12. C(graphite)+2h2(g)→CH4(g); ΔrH=y kJ mol−1 (a) x = y (b) x = 2y (c) x > y (d) x < y
Answer» Consider the reactions given below. On the basis of these reactions find out which of the algebraic relationship given in options (a) to (d) is correct? $1. C (g) + 4 H (g) \to C H_{4} (g); Δ_{r} H = x k J m o l^{- 1} 2. C (g r a p h i t e) + 2 h_{2} (g) \to C H_{4} (g); Δ_{r} H = y k J m o l^{- 1}$ (a) x = y (b) x = 2y (c) x > y (d) x < y

Discussion

48.	Which one of the following oxides exhibits paramagnetic behaviour?
Answer» Which one of the following oxides exhibits paramagnetic behaviour?

Discussion

49.	Which of the following is the most reactive in Friedel craft acylation reaction?
Answer» Which of the following is the most reactive in Friedel craft acylation reaction?

Discussion

50.	In the above reaction Q may be:
Answer» In the above reaction Q may be:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In pyrrole the electron density is maximum on

Find the molarity of a 15% (w/w) H2SO4 solution. (Density of the solution is 1.10 g/mL)

In nitration of benzene

Which of the following compounds has the highest value of pKa?

If 1gram of sulphur dioxide contains x molecules, what will be the number of molecules in 1gram of methane?

Sir can u please give me a list of metallurgical processes and elements or list of road related to them

For the reaction 2NH3(g)⇌N2(g)+3H2(g),ΔH=93.6 kJ mol−1. Which of the following facts does not hold well?

Total number of electron in phosphorus which have zero value of at least one quantum number.

The most stable carbocation is

In the depression of the freezing point experiment it is found that

For the reaction A+2B⇌C+D, the equilibrium constant is 1.0×108. Calculate the equilibrium concentration of A if 1.0 mole of A and 3.0 mole of B are placed in 1L flask and allowed to attain the equilibrium ?

At temperature T, a compound AB2(g) dissociates according to the reaction 2AB2(g)⇌2AB(g)+B2(g) with degree of dissociation α (which is very small). The expression for KP in terms of α and the total pressure, PT is:

One mole of an ideal gas is taken from a to b along two paths denoted by the solid and the dashed lines as shown in the graph below. It the work done along the solid line path is Ws and that along the dotted line path is WdWs is ___

A good example of organic fertilizer which improves phosphorus uptake is

The EAN of metal atoms in [Fe(CO)2(NO+)2] and Co2(CO)8 respectively are: (correct answer +2, wrong answer -0.5)

B2H6 reacts with O2 and H2O respectvely to form:

The volume of a given mass of a gas is 300 ml, measured at 798 mm pressure. What will be the volume, if pressure is reduced to 760 mm at constant temperature?

Kp is how many times equal to Kc for the given reaction? N2(g)+3H2(g)⇌2NH3(g)

The boiling point of a solution of 0.105 gm of a substance in 15.84 gram of ether was found to be 100°C higher than that of pure ether. What is the molecular weight of the substance [Molecular elevation constant of ether per 100 g = 21.6]

Which of the following compounds is not colored yellow?

Which one of the following ions has an electronic configuration of [Ar]3d6 ? (Atomic Number: Mn =25,Fe=26,Co = 27,Ni = 28)

If 21 g of NaHCO3 is added to 15 g of CH3COOH solution, the residue is found to weigh 25 g. what is the mass of CO2 is released in the reaction?

avogadro's law

Which of the following carbocation is most stable? (a) (CH3)3C.+CH2 (b) (CH3)3+C (c) CH3CH2+CH2 (d) CH3+CH CH2CH3

For the gas phase reaction C2H4+H2⇌C2H6, DH = -32.7kcal carried out in a vessel, the equilibrium concentration of C2H4 can be increased by -

The number of π bonds present in 2 - Ethyl anthraquinone is

In kinetic theory of gases, a molecule of mass m of an ideal gas collides with a wall of vessel with velocity V. The change in the linear momentum of the molecule is

The coinage metals are

The driving force for the completion of Claisen condensation between ethyl acetate and sodium ethoxide to ethyl acetoacetate is

n - butane can be obtained from I) n - butyl chloride / Zn + HClII)sec. butyl iodide / Zn - Cu couple III) Sodium n - valerate / NaOH + CaOIV) Sodium propionate / Kolbe's electrolysis

Specify the coordination geometry around and hybridization of N and B-atoms in a 1:1 complex of BF3:

Would you expect the first ionization enthalpies for two isotopes of the same element to be the same or different? Justify your answer.

The energy of second Bohr orbit of the hydrogen atom is −328 kJ mol−1; hence the energy of fourth Bohr orbit would be

Which of the following is true for a isobaric process?

Assertion (A): Solvay process is used for the preparation of NaHCO3 but not for KHCO3 Reason (R): Solubility of KHCO3 is more than NaHCO3 in water

In the above sequence X, Y and Z are

Which of the following is more basic than aniline?

Which of the following electrolytes is least effective in causing flocculation of ferric hydroxide sol [MNR 1991; UPSEAT 1999]

What is the molarity of sulphuruc acid solution, that has a density of 1.84 gm/cc and contains 98% sulphuric acid by weight?

Which of the following clotting factors are known as ‘Christmas factor’?

Hybridization of central atom in NF3 is .

Column 1: Type of structure, Column 2: Co-ordination number of cation, Column 3: Co-ordination number of anion. Column 1Column 2Column 3(I)FCC(i)12(P)4(II)Anti-Flourite(ii)6(Q)12(III)BCC(iii)8(R)8(IV)Flourite(iv)4(S)6 The only correct combination for zinc blende is:

Calculate the molarity of a solution having 3.42 g sucrose in 500 mL solution.

Consider the reactions given below. On the basis of these reactions find out which of the algebraic relationship given in options (a) to (d) is correct? 1. C(g)+4H(g)→CH4(g); ΔrH=x kJ mol−12. C(graphite)+2h2(g)→CH4(g); ΔrH=y kJ mol−1 (a) x = y (b) x = 2y (c) x &gt; y (d) x &lt; y

Which one of the following oxides exhibits paramagnetic behaviour?

Which of the following is the most reactive in Friedel craft acylation reaction?

In the above reaction Q may be:

Consider the reactions given below. On the basis of these reactions find out which of the algebraic relationship given in options (a) to (d) is correct? 1. C(g)+4H(g)→CH4(g); ΔrH=x kJ mol−12. C(graphite)+2h2(g)→CH4(g); ΔrH=y kJ mol−1 (a) x = y (b) x = 2y (c) x > y (d) x < y