46295 + Interview Questions in Chemistry

1.	Natalite is a mixture of
Answer» Natalite is a mixture of

Discussion

2.	Which of the following species / molecules is aromatic?
Answer» Which of the following species / molecules is aromatic?

Discussion

3.	what does a wormhole means?
Answer» what does a wormhole means?

Discussion

4.	Which of the following is/are endothermic reaction(s)?
Answer» Which of the following is/are endothermic reaction(s)?

Discussion

5.	Why the solubility of alkyl / aryl group decreases with increase in size?
Answer» Why the solubility of alkyl / aryl group decreases with increase in size?

Discussion

6.	If an extra particle is occupying the voids. The defect is called __.
Answer» If an extra particle is occupying the voids. The defect is called __.

Discussion

7.	Ionic bond is not present in which of the following compounds?
Answer» Ionic bond is not present in which of the following compounds?

Discussion

8.	When some iron objects are kept in moist air for a few days, their surface gets coated with a reddish-brown powdery mass. What is the chemical name given to this mass?
Answer» When some iron objects are kept in moist air for a few days, their surface gets coated with a reddish-brown powdery mass. What is the chemical name given to this mass?

Discussion

9.	The hydroxides of alkali metals which sublime on heating are?
Answer» The hydroxides of alkali metals which sublime on heating are?

Discussion

10.	Match the atomic masses of the following: (a) K (i) 55 (b) Mn (ii) 39 (c) O (iii) 16 (d) Mg (iv) 24.3
Answer» Match the atomic masses of the following: (a) K (i) 55 (b) Mn (ii) 39 (c) O (iii) 16 (d) Mg (iv) 24.3

10.

Match the atomic masses of the following: (a) K (i) 55 (b) Mn (ii) 39 (c) O (iii) 16 (d) Mg (iv) 24.3

Answer»

Match the atomic masses of the following:
(a) K (i) 55
(b) Mn (ii) 39
(c) O (iii) 16

(d) Mg (iv) 24.3

Discussion

11.	Find out the product 'P' : 2C2H6+3O2(CH3COO)2Mn−−−−−−−−−−→△P+2H2O
Answer» Find out the product 'P' : $2 C_{2} H_{6} + 3 O_{2} (C H_{3} C O O)_{2} M n - --------- \to △ P + 2 H_{2} O$

Discussion

12.	What are Borides
Answer» What are Borides

Discussion

13.	Assuming that water vapour is an ideal gas, the internal energy change (∆U) when 1 mol of water is vapourised at 1 bar pressure and 100∘ C, (given : molar enthalpy of vapourisation of water at 1 bar and 373 K = 41 kJ mol−1 and R = 8.3 J mol−1 K−1 ) will be
Answer» Assuming that water vapour is an ideal gas, the internal energy change (∆U) when 1 mol of water is vapourised at 1 bar pressure and 100 $^{\circ}$ C, (given : molar enthalpy of vapourisation of water at 1 bar and 373 K = 41 kJ mol $^{- 1}$ and R = 8.3 J mol $^{- 1}$ K $^{- 1}$ ) will be

Discussion

14.	Which is true about effective nuclear charge?
Answer» Which is true about effective nuclear charge?

Discussion

15.	What is a photogrqphic plate which is effected by cathode rays?
Answer» What is a photogrqphic plate which is effected by cathode rays?

Discussion

16.	In heat capacity how could we get the specific heat capacity relation at constant volume please explain me in a detailed way
Answer» In heat capacity how could we get the specific heat capacity relation at constant volume please explain me in a detailed way

Discussion

17.	Why Cu+2 is more stable than Cu+ ?
Answer» Why Cu+2 is more stable than Cu+ ?

Discussion

18.	What is meant by Equivalent weight give me a simple formula to understand it?
Answer» What is meant by Equivalent weight give me a simple formula to understand it?

Discussion

19.	Despite having greater polarity HF boils at lower temperature than water. Why?
Answer» Despite having greater polarity HF boils at lower temperature than water. Why?

Discussion

20.	A solution of (–) – 1– Chloro – 1– phenyl ethane in toluene racemises slowly in the presence of a small amount of SbCl5 due to the formation of
Answer» A solution of (–) – 1– Chloro – 1– phenyl ethane in toluene racemises slowly in the presence of a small amount of $S b C l_{5}$ due to the formation of

Discussion

21.	Incorrect set among the following MoleculeDipole momentGeometry
Answer» Incorrect set among the following MoleculeDipole momentGeometry

21.

Incorrect set among the following MoleculeDipole momentGeometry

Answer»

Incorrect set among the following

MoleculeDipole momentGeometry

Discussion

22.	Bromination of salicylic acid with Br2 water gives
Answer» Bromination of salicylic acid with $B r_{2}$ water gives

Discussion

23.	Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in the figure. The correct order of their boiling point is
Answer» Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in the figure. The correct order of their boiling point is

23.

Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in the figure. The correct order of their boiling point is

Answer»

Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in the figure.

The correct order of their boiling point is

Discussion

24.	For a reaction A → B, it is found that the rate of the reaction quadruples when the concentration of A is doubled. The rate for the reaction is Rate = k [A]x, where the value of x is:
Answer» For a reaction A → B, it is found that the rate of the reaction quadruples when the concentration of A is doubled. The rate for the reaction is Rate = k [A]^x, where the value of x is:

Discussion

25.	Among the following molecules, the molecule with trigonal planar geometry is:
Answer» Among the following molecules, the molecule with trigonal planar geometry is:

Discussion

26.	A first order reaction has a rate constant 100 s-1. Its half life is
Answer» A first order reaction has a rate constant 100 s^-1. Its half life is

Discussion

27.	Why does boron trifluoride behave as a Lewis acid?
Answer» Why does boron trifluoride behave as a Lewis acid?

Discussion

28.	An electron of mass ′m′ is confined to a one dimensional box of length ′l′. If it makes a radiative transition from the second excited state to the ground state, the frequency of the photon emitted is:
Answer» An electron of mass $^{'} m^{'}$ is confined to a one dimensional box of length $^{'} l^{'}$ . If it makes a radiative transition from the second excited state to the ground state, the frequency of the photon emitted is:

Discussion

29.	The IUPAC name of [CO(NH3)(NO2)3]
Answer» The IUPAC name of $[C O (N H_{3}) (N O_{2})_{3}]$

Discussion

30.	Bond lengths of all the bonds between the central atom and the monovalent atom are equal in:
Answer» Bond lengths of all the bonds between the central atom and the monovalent atom are equal in:

Discussion

31.	The difference in the oxidation numbers of the two types of sulphur atoms in Na2S4O6 is ___
Answer» The difference in the oxidation numbers of the two types of sulphur atoms in $N a_{2} S_{4} O_{6}$ is ___

Discussion

32.	Which among the following is called as the pearl white?
Answer» Which among the following is called as the pearl white?

Discussion

33.	Which of the following dissolves in H2SO4 to given oleum?
Answer» Which of the following dissolves in $H_{2} S O_{4}$ to given oleum?

Discussion

34.	Interlayer distance in graphite is:
Answer» Interlayer distance in graphite is:

Discussion

35.	Find the double bond equivalent of the given compound.
Answer» Find the double bond equivalent of the given compound.

Discussion

36.	A certain current liberates 0.5 g of hydrogen in 2 hours. How many grams of oxygen can be liberated by the same current in same time?
Answer» A certain current liberates 0.5 g of hydrogen in 2 hours. How many grams of oxygen can be liberated by the same current in same time?

Discussion

37.	A white crystalline solid give following chemical test: ' X' (i) It liberates CO2 with NaHCO3 (ii) It forms a coloured dye on diazotization and coupling with β-Naphthol (iii) With Br2 water it forms white precipitate of 2, 4, 6 – tribromo aniline. ‘X’ can be identified as:
Answer» A white crystalline solid give following chemical test: ' X' (i) It liberates CO2 with $N a H C O_{3}$ (ii) It forms a coloured dye on diazotization and coupling with $β$ -Naphthol (iii) With $B r_{2}$ water it forms white precipitate of 2, 4, 6 – tribromo aniline. ‘X’ can be identified as:

Discussion

38.	Explain why interhalogen compounds are more reactive than halogen?
Answer» Explain why interhalogen compounds are more reactive than halogen?

Discussion

39.	Question 16 The electronic configurations of the elements A, B and C are given below. Answer the question on the basis of these configurations. A 1s2 2s2 2p6 B 1s2 2s2 2p6 3s2 3p3 C 1s2 2p6 2p6 3s2 3p5 The molecular formula of the compound formed from B and C will be (a) BC (b) B2C (c) BC2 (d) BC3
Answer» Question 16 The electronic configurations of the elements A, B and C are given below. Answer the question on the basis of these configurations. A $1 s^{2}$ $2 s^{2}$ $2 p^{6}$ B $1 s^{2}$ $2 s^{2}$ $2 p^{6}$ $3 s^{2}$ $3 p^{3}$ C $1 s^{2}$ $2 p^{6}$ $2 p^{6}$ $3 s^{2}$ $3 p^{5}$ The molecular formula of the compound formed from B and C will be (a) BC (b) $B_{2} C$ (c) $B C_{2}$ (d) $B C_{3}$

39.

Question 16 The electronic configurations of the elements A, B and C are given below. Answer the question on the basis of these configurations. A 1s2 2s2 2p6 B 1s2 2s2 2p6 3s2 3p3 C 1s2 2p6 2p6 3s2 3p5 The molecular formula of the compound formed from B and C will be (a) BC (b) B2C (c) BC2 (d) BC3

Answer»

Question 16

The electronic configurations of the elements A, B and C are given below. Answer the question on the basis of these configurations.

A $1 s^{2}$ $2 s^{2}$ $2 p^{6}$

B $1 s^{2}$ $2 s^{2}$ $2 p^{6}$ $3 s^{2}$ $3 p^{3}$

C $1 s^{2}$ $2 p^{6}$ $2 p^{6}$ $3 s^{2}$ $3 p^{5}$

The molecular formula of the compound formed from B and C will be

(a) BC

(b) $B_{2} C$

(c) $B C_{2}$

(d) $B C_{3}$

Discussion

40.	Formation of Cl- is exothermic but formation of O2- is endothermic . Explain
Answer» Formation of Cl^-is exothermic but formation of O^2- is endothermic . Explain

Discussion

41.	Write the expression for the de-Broglie wavelength associated with a charged particle having charge q and mass m, when it is accelerated by a potential V.
Answer» Write the expression for the de-Broglie wavelength associated with a charged particle having charge $q$ and mass $m$ , when it is accelerated by a potential $V$ .

Discussion

42.	State whether each of the following increases or decrease across a period and down a group. 1. Ionization enthalpy 2. Electron gain Enthalpy 3. Electronic Affinity 4. Lattice Enthalpy 5. Electronegativity 6. Electro positivity
Answer» State whether each of the following increases or decrease across a period and down a group. 1. Ionization enthalpy 2. Electron gain Enthalpy 3. Electronic Affinity 4. Lattice Enthalpy 5. Electronegativity 6. Electro positivity

42.

State whether each of the following increases or decrease across a period and down a group. 1. Ionization enthalpy 2. Electron gain Enthalpy 3. Electronic Affinity 4. Lattice Enthalpy 5. Electronegativity 6. Electro positivity

Answer»

State whether each of the following increases or decrease across a period and down a group.

1. Ionization enthalpy

2. Electron gain Enthalpy

3. Electronic Affinity

4. Lattice Enthalpy

5. Electronegativity

6. Electro positivity

Discussion

43.	In phosphine, how does phosphorus have -3 oxidation state, even though the electronegativity of hydrogen is more than phosphorus in Pauling's table?
Answer» In phosphine, how does phosphorus have -3 oxidation state, even though the electronegativity of hydrogen is more than phosphorus in Pauling's table?

Discussion

44.	In the reaction shown, which is the major product ?
Answer» In the reaction shown, which is the major product ?

44.

In the reaction shown, which is the major product ?

Answer»

In the reaction shown, which is the major product ?

Discussion

45.	Write avogadro's number.
Answer» Write avogadro's number.

Discussion

46.	The solubilities of metal carbonates in water decreases down the family. Why?
Answer» The solubilities of metal carbonates in water decreases down the family. Why?

Discussion

47.	An ideal gas in thermally insulated vessel at internal pressure =P1. volume =V1 and absolute temperature =T1 expands irrversibly against zero external pressure. as shown in the diagram. The final internal pressure, volume and absolute temperature of the gas are P2,V2 and T2 respectively. for this expansion.
Answer» An ideal gas in thermally insulated vessel at internal pressure $= P_{1}$ . volume $= V_{1}$ and absolute temperature $= T_{1}$ expands irrversibly against zero external pressure. as shown in the diagram. The final internal pressure, volume and absolute temperature of the gas are $P_{2}, V_{2}$ and $T_{2}$ respectively. for this expansion.

Discussion

48.	The complex ions [Co(NH3)5(NO2)]2+ and [Co(NH3)5(ONO)]2+ are called
Answer» The complex ions $[C o (N H_{3})_{5} (N O_{2})]^{2 +}$ and $[C o (N H_{3})_{5} (O N O)]^{2 +}$ are called

Discussion

49.	Molar conductivity (Λm) of an aqueous solution of sodium stearate, which behaves as a strong electrolyte, is recorded at varying concentrations (c) of sodium stearate. Which one of the following plots provides the correct representation of micelle formation in the solution? (critical micelle concentration (CMC) is marked with an arrow in the figures)
Answer» Molar conductivity $(Λ m)$ of an aqueous solution of sodium stearate, which behaves as a strong electrolyte, is recorded at varying concentrations (c) of sodium stearate. Which one of the following plots provides the correct representation of micelle formation in the solution? (critical micelle concentration (CMC) is marked with an arrow in the figures)

Discussion

50.	The electrolyte having maximum floccualtion value for AgI/Ag+ solution is:
Answer» The electrolyte having maximum floccualtion value for $A g I / A g^{+}$ solution is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Natalite is a mixture of

Which of the following species / molecules is aromatic?

what does a wormhole means?

Which of the following is/are endothermic reaction(s)?

Why the solubility of alkyl / aryl group decreases with increase in size?

If an extra particle is occupying the voids. The defect is called __.

Ionic bond is not present in which of the following compounds?

When some iron objects are kept in moist air for a few days, their surface gets coated with a reddish-brown powdery mass. What is the chemical name given to this mass?

The hydroxides of alkali metals which sublime on heating are?

Match the atomic masses of the following: (a) K (i) 55 (b) Mn (ii) 39 (c) O (iii) 16 (d) Mg (iv) 24.3

Find out the product 'P' : 2C2H6+3O2(CH3COO)2Mn−−−−−−−−−−→△P+2H2O

What are Borides

Assuming that water vapour is an ideal gas, the internal energy change (∆U) when 1 mol of water is vapourised at 1 bar pressure and 100∘ C, (given : molar enthalpy of vapourisation of water at 1 bar and 373 K = 41 kJ mol−1 and R = 8.3 J mol−1 K−1 ) will be

Which is true about effective nuclear charge?

What is a photogrqphic plate which is effected by cathode rays?

In heat capacity how could we get the specific heat capacity relation at constant volume please explain me in a detailed way

Why Cu+2 is more stable than Cu+ ?

What is meant by Equivalent weight give me a simple formula to understand it?

Despite having greater polarity HF boils at lower temperature than water. Why?

A solution of (–) – 1– Chloro – 1– phenyl ethane in toluene racemises slowly in the presence of a small amount of SbCl5 due to the formation of

Incorrect set among the following MoleculeDipole momentGeometry

Bromination of salicylic acid with Br2 water gives

Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in the figure. The correct order of their boiling point is

For a reaction A → B, it is found that the rate of the reaction quadruples when the concentration of A is doubled. The rate for the reaction is Rate = k [A]x, where the value of x is:

Among the following molecules, the molecule with trigonal planar geometry is:

A first order reaction has a rate constant 100 s-1. Its half life is

Why does boron trifluoride behave as a Lewis acid?

An electron of mass ′m′ is confined to a one dimensional box of length ′l′. If it makes a radiative transition from the second excited state to the ground state, the frequency of the photon emitted is:

The IUPAC name of [CO(NH3)(NO2)3]

Bond lengths of all the bonds between the central atom and the monovalent atom are equal in:

The difference in the oxidation numbers of the two types of sulphur atoms in Na2S4O6 is ___

Which among the following is called as the pearl white?

Which of the following dissolves in H2SO4 to given oleum?

Interlayer distance in graphite is:

Find the double bond equivalent of the given compound.

A certain current liberates 0.5 g of hydrogen in 2 hours. How many grams of oxygen can be liberated by the same current in same time?

A white crystalline solid give following chemical test: ' X' (i) It liberates CO2 with NaHCO3 (ii) It forms a coloured dye on diazotization and coupling with β-Naphthol (iii) With Br2 water it forms white precipitate of 2, 4, 6 – tribromo aniline. ‘X’ can be identified as:

Explain why interhalogen compounds are more reactive than halogen?

Question 16 The electronic configurations of the elements A, B and C are given below. Answer the question on the basis of these configurations. A 1s2 2s2 2p6 B 1s2 2s2 2p6 3s2 3p3 C 1s2 2p6 2p6 3s2 3p5 The molecular formula of the compound formed from B and C will be (a) BC (b) B2C (c) BC2 (d) BC3

Formation of Cl- is exothermic but formation of O2- is endothermic . Explain

Write the expression for the de-Broglie wavelength associated with a charged particle having charge q and mass m, when it is accelerated by a potential V.

State whether each of the following increases or decrease across a period and down a group. 1. Ionization enthalpy 2. Electron gain Enthalpy 3. Electronic Affinity 4. Lattice Enthalpy 5. Electronegativity 6. Electro positivity

In phosphine, how does phosphorus have -3 oxidation state, even though the electronegativity of hydrogen is more than phosphorus in Pauling's table?

In the reaction shown, which is the major product ?

Write avogadro's number.

The solubilities of metal carbonates in water decreases down the family. Why?

The complex ions [Co(NH3)5(NO2)]2+ and [Co(NH3)5(ONO)]2+ are called

The electrolyte having maximum floccualtion value for AgI/Ag+ solution is: