46295 + Interview Questions in Chemistry

1.	When the following redox reaction Cl2+OH−→ClO−3+Cl−+H2O is balanced by ion-electron method , what will be the coefficient of Cl2 and OH− respectively?
Answer» When the following redox reaction $C l_{2} + O H^{-} \to C l O_{3}^{-} + C l^{-} + H_{2} O$ is balanced by ion-electron method , what will be the coefficient of $C l_{2}$ and $O H^{-}$ respectively?

Discussion

2.	The rate of diffusion of a Gas and oxygen is in the ration 69:52. Find the Molecular weight of the Gas?
Answer» The rate of diffusion of a Gas and oxygen is in the ration 69:52. Find the Molecular weight of the Gas?

Discussion

3.	Which one of the following reactions does not involve either oxidation or reduction
Answer» Which one of the following reactions does not involve either oxidation or reduction

Discussion

4.	The formula of inorganic benzene is:
Answer» The formula of inorganic benzene is:

Discussion

5.	K1 and K2 for oxalic acid are 6.5×10−2 and 6.1×10−5 respectively. What will be [OH−] in a 0.01 M solution of sodium oxalate ?
Answer» $K_{1}$ and $K_{2}$ for oxalic acid are $6.5 \times 10^{- 2}$ and $6.1 \times 10^{- 5}$ respectively. What will be $[O H^{-}]$ in a 0.01 M solution of sodium oxalate ?

Discussion

6.	Enthalpy change for the reaction H+(aq)+OH−(aq)⟶H2O(l) IS−57.3 kJ mol−1. If 1 L of 0.5 MJNO3 is mixed with 2L of 0.1 MKOH, the enthalpy change would be
Answer» Enthalpy change for the reaction $H_{(a q)}^{+} + O H_{(a q)}^{-} ⟶ H_{2} O_{(} l) I S - 57.3 k J m o l^{- 1} .$ If 1 L of $0.5 M J N O_{3}$ is mixed with 2L of 0.1 MKOH, the enthalpy change would be

Discussion

7.	While considering double and triple bond which should be given preference for numbering
Answer» While considering double and triple bond which should be given preference for numbering

Discussion

8.	Which of the following exhibits +R (resonance) effect?
Answer» Which of the following exhibits +R (resonance) effect?

Discussion

9.	What is meant by polar solvent and polar solute with two examples.
Answer» What is meant by polar solvent and polar solute with two examples.

Discussion

10.	An aqueous solution of a metal bromide MBr2 of 0.05M is saturated with H2S. What is the minimum pH at which MS will precipitate? Given Ksp of MS = 6.0 × 10−21. Concentration of saturated H2S = 0.1M (K1 of H2S = 10−7 and K2 = 1.3 × 10−1C)
Answer» An aqueous solution of a metal bromide $M B r_{2}$ of $0.05 M$ is saturated with $H_{2} S$ . What is the minimum $p H$ at which $M S$ will precipitate? Given $K_{s p}$ of $M S$ = $6.0 \times 10^{- 21}$ . Concentration of saturated $H_{2} S$ = $0.1 M$ ( $K_{1}$ of $H_{2} S$ = $10^{- 7}$ and $K_{2}$ = $1.3 \times 10^{- 1} C$ )

Discussion

11.	What is the side product of soap industry? Give reactions showing soap formation.
Answer» What is the side product of soap industry? Give reactions showing soap formation.

Discussion

12.	Illustrate the examples the limitations of Williamson's synthesis for the preparation of certain types of ethers.
Answer» Illustrate the examples the limitations of Williamson's synthesis for the preparation of certain types of ethers.

Discussion

13.	Enzymes that utilize ATP in phosphate transfer, require an alkaline earth metal (M) as the cofactor. M is:
Answer» Enzymes that utilize ATP in phosphate transfer, require an alkaline earth metal (M) as the cofactor. M is:

Discussion

14.	The enthalpy of hydrogenation of benzene is -207 kJ/mol and its resonance energy is -150 kJ/mol. Calculate the enthalpy of hydrogenation −△H in kJ/mol for 1,4-cyclohexadiene.
Answer» The enthalpy of hydrogenation of benzene is -207 kJ/mol and its resonance energy is -150 kJ/mol. Calculate the enthalpy of hydrogenation $- △ H$ in kJ/mol for 1,4-cyclohexadiene.

Discussion

15.	The species with a radius less than of Ne is a)Mg2+ b)F- c)O2- d)K+
Answer» The species with a radius less than of Ne is a)Mg2+ b)F- c)O2- d)K+

15.

The species with a radius less than of Ne is a)Mg2+ b)F- c)O2- d)K+

Answer»

The species with a radius less than of Ne is

a)Mg2+

b)F-

c)O2-

d)K+

Discussion

16.	If 3.01*1020 molecules are removed from 98mg of H2SO4 then no. Of moles of H2SO4 left are?
Answer» If 3.01*10²⁰ molecules are removed from 98mg of H₂SO₄ then no. Of moles of H₂SO₄ left are?

Discussion

17.	Define the following: (a) Cationic detergents (b) Broad spectrum antibiotics (c) Tranquilizers
Answer» Define the following: (a) Cationic detergents (b) Broad spectrum antibiotics (c) Tranquilizers

Discussion

18.	Which one of the following is incorrect for ideal solution ?
Answer» Which one of the following is incorrect for ideal solution ?

Discussion

19.	In a copper iron thermocouple , the thermoelectric current flows from ? Please tell me what is a thermocouple and if we insert a new metal to thermocouple what happens
Answer» In a copper iron thermocouple , the thermoelectric current flows from ? Please tell me what is a thermocouple and if we insert a new metal to thermocouple what happens

Discussion

20.	The IUPAC name of the compound
Answer» The IUPAC name of the compound

Discussion

21.	Why is the coefficient of volume expansion independent of temparature for liquids?
Answer» Why is the coefficient of volume expansion independent of temparature for liquids?

Discussion

22.	Tetrahydrofuran is a type of:
Answer» Tetrahydrofuran is a type of:

Discussion

23.	Which noble gas element is radioactive ?
Answer» Which noble gas element is radioactive ?

Discussion

24.	Answer the following questions: 1) Write down the chemistry involved in lead storage cell during charging and working. 2) What is cathodic protection? Write down the chemistry involved in rusting of iron .
Answer» Answer the following questions: 1) Write down the chemistry involved in lead storage cell during charging and working. 2) What is cathodic protection? Write down the chemistry involved in rusting of iron .

Discussion

25.	CH2=CH−CH2−IHI(excess)−−−−−−−→Heat major product
Answer» $C H_{2} = C H - C H_{2} - I H I (e x c e s s) - ------ \to H e a t$ major product

Discussion

26.	Na2SO4 is soluble in water while BaSo4 is insoluble. Which of the reason is correct about the above statement
Answer» $N a_{2} S O_{4}$ is soluble in water while $B a S o_{4}$ is insoluble. Which of the reason is correct about the above statement

Discussion

27.	The reaction between H2(g) and O2(g) is highly feasible yet allowing the gases to stand at room temperature in the same vessel does not lead to the formation of water. Explain.
Answer» The reaction between $H_{2} (g)$ and $O_{2} (g)$ is highly feasible yet allowing the gases to stand at room temperature in the same vessel does not lead to the formation of water. Explain.

Discussion

28.	Question 10 Which of the following is responsible to rule out the existence of definite paths or trajectories of electrons ? (a) Pauli's exclusion principle (b) Heisenberg's uncertainty principle (c) Hund's rule of maximum multiplicity (d) Aufbau principle
Answer» Question 10 Which of the following is responsible to rule out the existence of definite paths or trajectories of electrons ? (a) Pauli's exclusion principle (b) Heisenberg's uncertainty principle (c) Hund's rule of maximum multiplicity (d) Aufbau principle

28.

Question 10 Which of the following is responsible to rule out the existence of definite paths or trajectories of electrons ? (a) Pauli's exclusion principle (b) Heisenberg's uncertainty principle (c) Hund's rule of maximum multiplicity (d) Aufbau principle

Answer»

Question 10

Which of the following is responsible to rule out the existence of definite paths or trajectories of electrons ?

(a) Pauli's exclusion principle

(b) Heisenberg's uncertainty principle

(c) Hund's rule of maximum multiplicity

(d) Aufbau principle

Discussion

29.	Non planar molecules among the following A) B3N3H6 B) B2H6 C) C2H4 D) C3H6
Answer» Non planar molecules among the following A) $B_{3} N_{3} H_{6}$ B) $B_{2} H_{6}$ C) $C_{2} H_{4}$ D) $C_{3} H_{6}$

29.

Non planar molecules among the following A) B3N3H6 B) B2H6 C) C2H4 D) C3H6

Answer»

Non planar molecules among the following

A) $B_{3} N_{3} H_{6}$ B) $B_{2} H_{6}$ C) $C_{2} H_{4}$ D) $C_{3} H_{6}$

Discussion

30.	Which of the following reaction sequence(s) is/are suitable to convert acetone to methylamine?
Answer» Which of the following reaction sequence(s) is/are suitable to convert acetone to methylamine?

Discussion

31.	Indicate which nitrogen compound amongst the following would undergo Hofmann's reaction (i.e. reaction with Br2 and strong KOH) to furnish the primary amine (R−NH2)
Answer» Indicate which nitrogen compound amongst the following would undergo Hofmann's reaction (i.e. reaction with $B r_{2}$ and strong KOH) to furnish the primary amine $(R - N H_{2})$

Discussion

32.	The correct statement is
Answer» The correct statement is

Discussion

33.	The oxidation of ammonia happens by this reaction: 4NH3(g)+3O2(g)⟶2N2(g)+6H2O(g), if the rate of formation of N2 is 0.5 molL−1s−1 then, the rate at which NH3 gets consumed is:
Answer» The oxidation of ammonia happens by this reaction: $4 N H_{3} (g) + 3 O_{2} (g) ⟶ 2 N_{2} (g) + 6 H_{2} O (g)$ , if the rate of formation of $N_{2}$ is $0.5 m o l L^{- 1} s^{- 1}$ then, the rate at which $N H_{3}$ gets consumed is:

Discussion

34.	Very pure hydrogen is obtained by
Answer» Very pure hydrogen is obtained by

Discussion

35.	The approximate wavelength associated with a gold ball weighing 200 gm and moving at a speed of 5 m/h is in the order of ?
Answer» The approximate wavelength associated with a gold ball weighing 200 gm and moving at a speed of 5 m/h is in the order of ?

Discussion

36.	The compounds(s) that on hydrogenation produce(s) optically inactive compound(s) is/(are):
Answer» The compounds(s) that on hydrogenation produce(s) optically inactive compound(s) is/(are):

Discussion

37.	Which of the following is β - carbon in? CH3IV−CIIIH2−H\|CHII−Br\|CH2I
Answer» Which of the following is $β$ - carbon in? $C H_{3} I V - C I I I H_{2} - H \| C H I I - B r \| C H_{2} I$

Discussion

38.	If the radius of 2nd Bohr orbit of hydrogen atom is r2, then the radius of the third Bohr orbit will be:
Answer» If the radius of $2^{n d}$ Bohr orbit of hydrogen atom is $r_{2}$ , then the radius of the third Bohr orbit will be:

Discussion

39.	In the following sequence of reactions CH3−BrKCN→AH3O+→BLiAIH4−−−−−→etherC, the end product (C) is:
Answer» In the following sequence of reactions $C H_{3} - B r K C N \to A H_{3} O^{+} \to B L i A I H_{4} - ---- \to e t h e r C,$ the end product (C) is:

Discussion

40.	An amino acid under certain conditions have both positive and negativ charges simultaneously in the same molecule. Such a form of amine acid is called (a) acidic form (b) basic form (c) aromatic form (d) zwitterionic form
Answer» An amino acid under certain conditions have both positive and negativ charges simultaneously in the same molecule. Such a form of amine acid is called (a) acidic form (b) basic form (c) aromatic form (d) zwitterionic form

40.

An amino acid under certain conditions have both positive and negativ charges simultaneously in the same molecule. Such a form of amine acid is called (a) acidic form (b) basic form (c) aromatic form (d) zwitterionic form

Answer»

An amino acid under certain conditions have both positive and negativ charges simultaneously in the same molecule. Such a form of amine acid is called

(a) acidic form (b) basic form

(c) aromatic form (d) zwitterionic form

Discussion

41.	Al4C3 +2D2O gives
Answer» Al4C3 +2D2O gives

Discussion

42.	List-I contains chiral molecules and List-II contains number of stereoisomers. Which of the following has the correct combination considering List-I and List-II?
Answer» List-I contains chiral molecules and List-II contains number of stereoisomers. Which of the following has the correct combination considering List-I and List-II?

Discussion

43.	The correct order regarding electronegativity of hybrid orbitals of carbon is :
Answer» The correct order regarding electronegativity of hybrid orbitals of carbon is :

Discussion

44.	What is fermionic condensate and how it is formed?
Answer» What is fermionic condensate and how it is formed?

Discussion

45.	The smog is essentially caused by the presence of
Answer» The smog is essentially caused by the presence of

Discussion

46.	The vapours of Hg absorb some electrons accelerated by a potential difference of 4.5 eV, as a result of which, light is emitted. If the full energy of a single incident electron is supposed to be converted into light emitted by a single Hg atom, find the wave number 1λ of the light. (Take: Planck's constant (h) =6.6×10−34 Js)
Answer» The vapours of $H g$ absorb some electrons accelerated by a potential difference of $4.5 eV$ , as a result of which, light is emitted. If the full energy of a single incident electron is supposed to be converted into light emitted by a single $H g$ atom, find the wave number $\frac{1}{λ}$ of the light. (Take: Planck's constant (h) = $6.6 \times 10^{- 34} J s$ )

Discussion

47.	Assign number 1 for least to 4 for most to indicate the relative basic strength of the following: (I) C6H5NH2 (II) p−NO2C6H4NH2 (III) m−NO2C6H4NH2 (IV) p−CH3OC6H4NH2
Answer» Assign number 1 for least to 4 for most to indicate the relative basic strength of the following: (I) $C_{6} H_{5} N H_{2}$ (II) $p - N O_{2} C_{6} H_{4} N H_{2}$ (III) $m - N O_{2} C_{6} H_{4} N H_{2}$ (IV) $p - C H_{3} O C_{6} H_{4} N H_{2}$

Discussion

48.	Which is the least stable carbocation?
Answer» Which is the least stable carbocation?

Discussion

49.	The standard enthalpy of formation of CF2ClCF2Cl(g) (ΔfH∘300) at 1 bar and 300 K from its constituent elements in their standard states is −900 kJ mol−1. (Given, R=8.3 J K−1 mol−1) The standard internal energy of formation (Δ∘fU300) at the same pressure and temperature is:
Answer» The standard enthalpy of formation of $C F_{2} C l C F_{2} C l (g)$ $(Δ_{f} H_{300}^{\circ})$ at $1 bar$ and $300 K$ from its constituent elements in their standard states is $- 900 {kJ mol}^{- 1}$ . (Given, $R = 8.3 {J K}^{- 1} {mol}^{- 1}$ ) The standard internal energy of formation $(Δ_{f}^{\circ} U_{300})$ at the same pressure and temperature is:

Discussion

50.	To an acidified dichromate solution, a pinch of Na2O2 is added and shaken. What is observed?
Answer» To an acidified dichromate solution, a pinch of Na₂O₂ is added and shaken. What is observed?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

When the following redox reaction Cl2+OH−→ClO−3+Cl−+H2O is balanced by ion-electron method , what will be the coefficient of Cl2 and OH− respectively?

The rate of diffusion of a Gas and oxygen is in the ration 69:52. Find the Molecular weight of the Gas?

Which one of the following reactions does not involve either oxidation or reduction

The formula of inorganic benzene is:

K1 and K2 for oxalic acid are 6.5×10−2 and 6.1×10−5 respectively. What will be [OH−] in a 0.01 M solution of sodium oxalate ?

Enthalpy change for the reaction H+(aq)+OH−(aq)⟶H2O(l) IS−57.3 kJ mol−1. If 1 L of 0.5 MJNO3 is mixed with 2L of 0.1 MKOH, the enthalpy change would be

While considering double and triple bond which should be given preference for numbering

Which of the following exhibits +R (resonance) effect?

What is meant by polar solvent and polar solute with two examples.

An aqueous solution of a metal bromide MBr2 of 0.05M is saturated with H2S. What is the minimum pH at which MS will precipitate? Given Ksp of MS = 6.0 × 10−21. Concentration of saturated H2S = 0.1M (K1 of H2S = 10−7 and K2 = 1.3 × 10−1C)

What is the side product of soap industry? Give reactions showing soap formation.

Illustrate the examples the limitations of Williamson's synthesis for the preparation of certain types of ethers.

Enzymes that utilize ATP in phosphate transfer, require an alkaline earth metal (M) as the cofactor. M is:

The enthalpy of hydrogenation of benzene is -207 kJ/mol and its resonance energy is -150 kJ/mol. Calculate the enthalpy of hydrogenation −△H in kJ/mol for 1,4-cyclohexadiene.

The species with a radius less than of Ne is a)Mg2+ b)F- c)O2- d)K+

If 3.01*1020 molecules are removed from 98mg of H2​​​​​SO4 then no. Of moles of H2SO​​​4 left are?

Define the following: (a) Cationic detergents (b) Broad spectrum antibiotics (c) Tranquilizers

Which one of the following is incorrect for ideal solution ?

In a copper iron thermocouple , the thermoelectric current flows from ? Please tell me what is a thermocouple and if we insert a new metal to thermocouple what happens

The IUPAC name of the compound

Why is the coefficient of volume expansion independent of temparature for liquids?

Tetrahydrofuran is a type of:

Which noble gas element is radioactive ?

Answer the following questions: 1) Write down the chemistry involved in lead storage cell during charging and working. 2) What is cathodic protection? Write down the chemistry involved in rusting of iron .

CH2=CH−CH2−IHI(excess)−−−−−−−→Heat major product

Na2SO4 is soluble in water while BaSo4 is insoluble. Which of the reason is correct about the above statement

The reaction between H2(g) and O2(g) is highly feasible yet allowing the gases to stand at room temperature in the same vessel does not lead to the formation of water. Explain.

Question 10 Which of the following is responsible to rule out the existence of definite paths or trajectories of electrons ? (a) Pauli's exclusion principle (b) Heisenberg's uncertainty principle (c) Hund's rule of maximum multiplicity (d) Aufbau principle

Non planar molecules among the following A) B3N3H6 B) B2H6 C) C2H4 D) C3H6

Which of the following reaction sequence(s) is/are suitable to convert acetone to methylamine?

Indicate which nitrogen compound amongst the following would undergo Hofmann's reaction (i.e. reaction with Br2 and strong KOH) to furnish the primary amine (R−NH2)

The correct statement is

The oxidation of ammonia happens by this reaction: 4NH3(g)+3O2(g)⟶2N2(g)+6H2O(g), if the rate of formation of N2 is 0.5 molL−1s−1 then, the rate at which NH3 gets consumed is:

Very pure hydrogen is obtained by

The approximate wavelength associated with a gold ball weighing 200 gm and moving at a speed of 5 m/h is in the order of ?

The compounds(s) that on hydrogenation produce(s) optically inactive compound(s) is/(are):

Which of the following is β - carbon in? CH3IV−CIIIH2−H|CHII−Br|CH2I

If the radius of 2nd Bohr orbit of hydrogen atom is r2, then the radius of the third Bohr orbit will be:

In the following sequence of reactions CH3−BrKCN→AH3O+→BLiAIH4−−−−−→etherC, the end product (C) is:

An amino acid under certain conditions have both positive and negativ charges simultaneously in the same molecule. Such a form of amine acid is called (a) acidic form (b) basic form (c) aromatic form (d) zwitterionic form

Al4C3 +2D2O gives

List-I contains chiral molecules and List-II contains number of stereoisomers. Which of the following has the correct combination considering List-I and List-II?

The correct order regarding electronegativity of hybrid orbitals of carbon is :

What is fermionic condensate and how it is formed?

The smog is essentially caused by the presence of

Assign number 1 for least to 4 for most to indicate the relative basic strength of the following: (I) C6H5NH2 (II) p−NO2C6H4NH2 (III) m−NO2C6H4NH2 (IV) p−CH3OC6H4NH2

Which is the least stable carbocation?

The standard enthalpy of formation of CF2ClCF2Cl(g) (ΔfH∘300) at 1 bar and 300 K from its constituent elements in their standard states is −900 kJ mol−1. (Given, R=8.3 J K−1 mol−1) The standard internal energy of formation (Δ∘fU300) at the same pressure and temperature is:

To an acidified dichromate solution, a pinch of Na2O2 is added and shaken. What is observed?

If 3.01*1020 molecules are removed from 98mg of H2SO4 then no. Of moles of H2SO4 left are?