46295 + Interview Questions in Chemistry

1.	How many monochlorinated products are possible including stereoisomers?CH3−CH2−CH=CH2Cl2−−→hν
Answer» How many monochlorinated products are possible including stereoisomers? $C H_{3} - C H_{2} - C H = C H_{2} C l_{2} - - \to h ν$

Discussion

2.	Identical photons are incident on a perfectly black body of mass m kept at rest on a smooth horizontal surface. If n number of photons are incident per second, then the acceleration of the body will be :(Assume wavelength of photon to be λ)
Answer» Identical photons are incident on a perfectly black body of mass $m$ kept at rest on a smooth horizontal surface. If $n$ number of photons are incident per second, then the acceleration of the body will be : $($ Assume wavelength of photon to be $λ)$

Discussion

3.	Which of the following compounds is an imide?
Answer» Which of the following compounds is an imide?

Discussion

4.	What possibly can be the ratio of the de Broglie wavelength of two electrons having the same initial energy and accelerated through 50 V and 200 V
Answer» What possibly can be the ratio of the de Broglie wavelength of two electrons having the same initial energy and accelerated through $50 V$ and $200 V$

Discussion

5.	IManganese14. The thermal stability of BaCO3, CaCO3, SrCO3 and MgCO3 decreases inthe order(a) BaCO3>SrCO3> MgCO3> CaCO3(b) CaCO3> SrCO3 > MgCO3> BaCO3(c) MgCOs>CaCO3> SrCO3> BaCO3(d) BaCOg>SrCO3> CaCO3> MgCO
Answer» IManganese14. The thermal stability of BaCO3, CaCO3, SrCO3 and MgCO3 decreases inthe order(a) BaCO3>SrCO3> MgCO3> CaCO3(b) CaCO3> SrCO3 > MgCO3> BaCO3(c) MgCOs>CaCO3> SrCO3> BaCO3(d) BaCOg>SrCO3> CaCO3> MgCO

Discussion

6.	Balance the equation Cu + HN03 Cu(NO3) + NO2 + H2O
Answer» Balance the equation Cu + HN03 Cu(NO3) + NO2 + H2O

Discussion

7.	How many grams of oxygen are required for complete combustion of 2 moles of benzene?
Answer» How many grams of oxygen are required for complete combustion of 2 moles of benzene?

Discussion

8.	22. The EMF of a concentration cell consisting of two Zn electrodes, one dipping into M/4 solution of zinc sulphate and the other into M/16 solution of the same salt at 25 degree celsius is : 1. 0.0125 V 2. 0.0250 V 3. 0.0178 V 4. 0.0356 V
Answer» 22. The EMF of a concentration cell consisting of two Zn electrodes, one dipping into M/4 solution of zinc sulphate and the other into M/16 solution of the same salt at 25 degree celsius is : 1. 0.0125 V 2. 0.0250 V 3. 0.0178 V 4. 0.0356 V

Discussion

9.	Calucalculate standard entropy change in the reaction Fe2O3(s) + 3H2(g) → 2Fe(s) + 2H2O(1) Given: Som(Fe2O3,S) = 87.4, Som(Fe,S) = 27.3 Som(H2,g) = 130.7, Som(H2O,1)= 69.9 JK−1mol2
Answer» Calucalculate standard entropy change in the reaction $F e_{2} O_{3} (s) + 3 H_{2} (g) \to 2 F e (s) + 2 H_{2} O (1)$ Given: $S_{m}^{o} (F e_{2} O_{3}, S) = 87.4, S_{m}^{o} (F e, S) = 27.3$ $S_{m}^{o} (H_{2}, g) = 130.7, S_{m}^{o} (H_{2} O, 1) = 69.9 J K^{- 1} m o l^{2}$

9.

Calucalculate standard entropy change in the reaction Fe2O3(s) + 3H2(g) → 2Fe(s) + 2H2O(1) Given: Som(Fe2O3,S) = 87.4, Som(Fe,S) = 27.3 Som(H2,g) = 130.7, Som(H2O,1)= 69.9 JK−1mol2

Answer»

Calucalculate standard entropy change in the reaction

$F e_{2} O_{3} (s) + 3 H_{2} (g) \to 2 F e (s) + 2 H_{2} O (1)$

Given: $S_{m}^{o} (F e_{2} O_{3}, S) = 87.4, S_{m}^{o} (F e, S) = 27.3$

$S_{m}^{o} (H_{2}, g) = 130.7, S_{m}^{o} (H_{2} O, 1) = 69.9 J K^{- 1} m o l^{2}$

Discussion

10.	Nucleophilic substitution and elimination reactions of alkyl halides oftenly compete each other, elimination reactions are favoured under which condition.
Answer» Nucleophilic substitution and elimination reactions of alkyl halides oftenly compete each other, elimination reactions are favoured under which condition.

Discussion

11.	In a crystalline solids, anions are arranged in fcc packing. Cations occupy half the tetrahedral voids and all the octahedral voids. The ratio of cations and anions in the solid is
Answer» In a crystalline solids, anions are arranged in fcc packing. Cations occupy half the tetrahedral voids and all the octahedral voids. The ratio of cations and anions in the solid is

Discussion

12.	The enthalpy of Hydrogenation of cyclohexene and benzene are –119 kJ mol and –208 kJ mol respectively. Find the resonance energy of benzene.
Answer» The enthalpy of Hydrogenation of cyclohexene and benzene are –119 kJ mol and –208 kJ mol respectively. Find the resonance energy of benzene.

Discussion

13.	P4O7 form covalent bond or not
Answer» P4O7 form covalent bond or not

Discussion

14.	45.What is thermal equilibrium in case of zeroth law of themodynamics?
Answer» 45.What is thermal equilibrium in case of zeroth law of themodynamics?

Discussion

15.	Zn is related to which group
Answer» Zn is related to which group

Discussion

16.	If AgI crystallize in zinc blende structure with I− ions at lattice points, what fraction of tetrahedral voids is occupied by Ag+ ions?
Answer» If AgI crystallize in zinc blende structure with $I^{-}$ ions at lattice points, what fraction of tetrahedral voids is occupied by $A g^{+}$ ions?

Discussion

17.	The IUPAC Name of CH3−CH\|CH3−CH\|CH3−CH\|CHO−CH2−CH2−CH3 is
Answer» The IUPAC Name of $C H_{3} - C H \| C H_{3} - C H \| C H_{3} - C H \| C H O - C H_{2} - C H_{2} - C H_{3}$ is

17.

The IUPAC Name of CH3−CH|CH3−CH|CH3−CH|CHO−CH2−CH2−CH3 is

Answer»

The IUPAC Name of

$C H_{3} - C H | C H_{3} - C H | C H_{3} - C H | C H O - C H_{2} - C H_{2} - C H_{3}$ is

Discussion

18.	The least stable radical among the following radicals is :
Answer» The least stable radical among the following radicals is :

Discussion

19.	Where should we use -oic acid and whher should we use carboxylic acid in the end of a compound .In my class they say that we should use carboxylic acid in the end when carboxylic acid s carbon is included in the long chain.what is the correct method
Answer» Where should we use -oic acid and whher should we use carboxylic acid in the end of a compound .In my class they say that we should use carboxylic acid in the end when carboxylic acid s carbon is included in the long chain.what is the correct method

Discussion

20.	An alkyl bromide (A) forms Grignard reagent which on treatment with water, yields n-hexane. (A) On treatment with sodium forms 4,5-diethyloctane. (A) is:
Answer» An alkyl bromide (A) forms Grignard reagent which on treatment with water, yields n-hexane. (A) On treatment with sodium forms 4,5-diethyloctane. (A) is:

Discussion

21.	Which of the following doesn’t give HVZ reaction :
Answer» Which of the following doesn’t give HVZ reaction :

Discussion

22.	When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is X:Y. Find the value of XY.
Answer» When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is $X : Y$ . Find the value of $\frac{X}{Y}$ .

Discussion

23.	Predict the structure of final product 'C' in the following sequence:
Answer» Predict the structure of final product 'C' in the following sequence:

Discussion

24.	Ratio of specific charge of proton and an alpha particle is 1) 2:1 2) 1:2 3) 1:4 4) 1:1
Answer» Ratio of specific charge of proton and an alpha particle is 1) 2:1 2) 1:2 3) 1:4 4) 1:1

Discussion

25.	Why is catenation property of phosphorus greater than nitrogen?
Answer» Why is catenation property of phosphorus greater than nitrogen?

Discussion

26.	Arrange the strength of mesomeric, hyperconjugation and inductive effect in compounds
Answer» Arrange the strength of mesomeric, hyperconjugation and inductive effect in compounds

Discussion

27.	What will be the oxidation number of Chromium (Cr) in CrO5?
Answer» What will be the oxidation number of Chromium $(C r)$ in $C r O_{5}$ ?

Discussion

28.	Discuss the role of three services needed in supply of electricity. Should they be in different hands?
Answer» Discuss the role of three services needed in supply of electricity. Should they be in different hands?

Discussion

29.	What are applications of cryogenics which is the study of the production and behaviour of materials at very low temperatures? Code:
Answer» What are applications of cryogenics which is the study of the production and behaviour of materials at very low temperatures? Code:

29.

What are applications of cryogenics which is the study of the production and behaviour of materials at very low temperatures? Code:

Answer»

What are applications of cryogenics which is the study of the production and behaviour of materials at very low temperatures?

Code:

Discussion

30.	How rate of loss of heat = massspecific heatrate of fall of temperature
Answer» How rate of loss of heat = massspecific heatrate of fall of temperature

Discussion

31.	The incorrect statement in the following is
Answer» The incorrect statement in the following is

Discussion

32.	Chlorobenzene is formed by reaction of chlorine with benzene in the presence of AlCl3. Which of the following species attacks the benzene ring in this reaction? (a) Cl− (b) Cl+ (c) AlCl3 (d) [AlCl4]−
Answer» Chlorobenzene is formed by reaction of chlorine with benzene in the presence of $A l C l_{3}$ . Which of the following species attacks the benzene ring in this reaction? (a) $C l^{-}$ (b) $C l^{+}$ (c) $A l C l_{3}$ (d) $[A l C l_{4}]^{-}$

32.

Chlorobenzene is formed by reaction of chlorine with benzene in the presence of AlCl3. Which of the following species attacks the benzene ring in this reaction? (a) Cl− (b) Cl+ (c) AlCl3 (d) [AlCl4]−

Answer»

Chlorobenzene is formed by reaction of chlorine with benzene in the presence of $A l C l_{3}$ . Which of the following species attacks the benzene ring in this reaction?

(a) $C l^{-}$ (b) $C l^{+}$ (c) $A l C l_{3}$ (d) $[A l C l_{4}]^{-}$

Discussion

33.	How are metals used as semiconductors refined? What is the principle of the method used like germanium, silicon etc?
Answer» How are metals used as semiconductors refined? What is the principle of the method used like germanium, silicon etc?

Discussion

34.	Why does entropy increases when we dissolute iodine in a solvent ?
Answer» Why does entropy increases when we dissolute iodine in a solvent ?

Discussion

35.	What is the oxidation number of the central metal atom in the coordination compound [Pt(NH3)3Cl]Cl?
Answer» What is the oxidation number of the central metal atom in the coordination compound $[P t (N H_{3})_{3} C l] C l ?$

Discussion

36.	The wavelength of radiation which would cause the photodissociation of chlorine molecule if the Cl−Cl bond energy is 243 kJ mol−1 is (h = 6.6×10−34Js).
Answer» The wavelength of radiation which would cause the photodissociation of chlorine molecule if the $C l - C l$ bond energy is $243 k J m o l^{- 1}$ is (h = $6.6 \times 10^{- 34} J s$ ).

Discussion

37.	I want to find out whether a molecule is ionic or covalent like I am specifically talking about the complex ones.
Answer» I want to find out whether a molecule is ionic or covalent like I am specifically talking about the complex ones.

Discussion

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

Discussion

39.	Colloidal sols shows brownian movement . Does true solution also shows ? If yes or no then"why"?
Answer» Colloidal sols shows brownian movement . Does true solution also shows ? If yes or no then"why"?

Discussion

40.	What is borax? How to prepare it and what are its chemical properties?
Answer» What is borax? How to prepare it and what are its chemical properties?

Discussion

41.	Addition of dihydrogen to propyne forms:
Answer» Addition of dihydrogen to propyne forms:

Discussion

42.	Which of the following has been arranged in the order of increasing bond strength?
Answer» Which of the following has been arranged in the order of increasing bond strength?

Discussion

43.	In the following carbocations, the stability order is:
Answer» In the following carbocations, the stability order is:

43.

In the following carbocations, the stability order is:

Answer»

In the following carbocations, the stability order is:

Discussion

44.	Identify the correct labels of A, B and C in the following graph from the options given below: Root mean square speed (Vrms); most probable speed (Vmp); average speed (Vav)
Answer» Identify the correct labels of A, B and C in the following graph from the options given below: Root mean square speed ( $V_{r} m s)$ ; most probable speed $(V_{m} p)$ ; average speed $(V_{a} v)$

Discussion

45.	7% by weight of earth's crust is made up of the white, shiny and highly reactive metal called __.
Answer» 7% by weight of earth's crust is made up of the white, shiny and highly reactive metal called __.

Discussion

46.	100 ml of 0.2 molar acetic acid with 50 ml of 0.1 M and magnesium Hydroxide calculate the pH of the final solution
Answer» 100 ml of 0.2 molar acetic acid with 50 ml of 0.1 M and magnesium Hydroxide calculate the pH of the final solution

Discussion

47.	Which of the following is not paramagnetic:
Answer» Which of the following is not paramagnetic:

Discussion

48.	The vapours of Hg absorb some electrons accelerated by a potential difference of 9.0 eV, as a result of which, light is emitted. If the 25% of 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 $9.0 eV$ , as a result of which, light is emitted. If the 25% of 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

49.	The empirical formula of a gaseous fluorocarbon is CF2. At a certian temperature and pressure, a 1 L volume hold 8.95 g of this fluorocarbon. Under the same conditions, 1 L volume holds only 1.70 g gaseous F2. Thus, fluorocarbon is_______. (F = 19)
Answer» The empirical formula of a gaseous fluorocarbon is $C F_{2}$ . At a certian temperature and pressure, a 1 L volume hold 8.95 g of this fluorocarbon. Under the same conditions, 1 L volume holds only 1.70 g gaseous $F_{2}$ . Thus, fluorocarbon is_______. (F = 19)

Discussion

50.	Which of the following shows maximum molar conductance ?
Answer» Which of the following shows maximum molar conductance ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

How many monochlorinated products are possible including stereoisomers?CH3−CH2−CH=CH2Cl2−−→hν

Identical photons are incident on a perfectly black body of mass m kept at rest on a smooth horizontal surface. If n number of photons are incident per second, then the acceleration of the body will be :(Assume wavelength of photon to be λ)

Which of the following compounds is an imide?

What possibly can be the ratio of the de Broglie wavelength of two electrons having the same initial energy and accelerated through 50 V and 200 V

IManganese14. The thermal stability of BaCO3, CaCO3, SrCO3 and MgCO3 decreases inthe order(a) BaCO3>SrCO3> MgCO3> CaCO3(b) CaCO3> SrCO3 > MgCO3> BaCO3(c) MgCOs>CaCO3> SrCO3> BaCO3(d) BaCOg>SrCO3> CaCO3> MgCO

Balance the equation Cu + HN03 Cu(NO3) + NO2 + H2O

How many grams of oxygen are required for complete combustion of 2 moles of benzene?

22. The EMF of a concentration cell consisting of two Zn electrodes, one dipping into M/4 solution of zinc sulphate and the other into M/16 solution of the same salt at 25 degree celsius is : 1. 0.0125 V 2. 0.0250 V 3. 0.0178 V 4. 0.0356 V

Calucalculate standard entropy change in the reaction Fe2O3(s) + 3H2(g) → 2Fe(s) + 2H2O(1) Given: Som(Fe2O3,S) = 87.4, Som(Fe,S) = 27.3 Som(H2,g) = 130.7, Som(H2O,1)= 69.9 JK−1mol2

Nucleophilic substitution and elimination reactions of alkyl halides oftenly compete each other, elimination reactions are favoured under which condition.

In a crystalline solids, anions are arranged in fcc packing. Cations occupy half the tetrahedral voids and all the octahedral voids. The ratio of cations and anions in the solid is

The enthalpy of Hydrogenation of cyclohexene and benzene are –119 kJ mol and –208 kJ mol respectively. Find the resonance energy of benzene.

P4O7 form covalent bond or not

45.What is thermal equilibrium in case of zeroth law of themodynamics?

Zn is related to which group

If AgI crystallize in zinc blende structure with I− ions at lattice points, what fraction of tetrahedral voids is occupied by Ag+ ions?

The IUPAC Name of CH3−CH|CH3−CH|CH3−CH|CHO−CH2−CH2−CH3 is

The least stable radical among the following radicals is :

Where should we use -oic acid and whher should we use carboxylic acid in the end of a compound .In my class they say that we should use carboxylic acid in the end when carboxylic acid s carbon is included in the long chain.what is the correct method

An alkyl bromide (A) forms Grignard reagent which on treatment with water, yields n-hexane. (A) On treatment with sodium forms 4,5-diethyloctane. (A) is:

Which of the following doesn’t give HVZ reaction :

When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is X:Y. Find the value of XY.

Predict the structure of final product 'C' in the following sequence:

Ratio of specific charge of proton and an alpha particle is 1) 2:1 2) 1:2 3) 1:4 4) 1:1

Why is catenation property of phosphorus greater than nitrogen?

Arrange the strength of mesomeric, hyperconjugation and inductive effect in compounds

What will be the oxidation number of Chromium (Cr) in CrO5?

Discuss the role of three services needed in supply of electricity. Should they be in different hands?

What are applications of cryogenics which is the study of the production and behaviour of materials at very low temperatures? Code:

How rate of loss of heat = mass*specific heat*rate of fall of temperature

The incorrect statement in the following is

Chlorobenzene is formed by reaction of chlorine with benzene in the presence of AlCl3. Which of the following species attacks the benzene ring in this reaction? (a) Cl− (b) Cl+ (c) AlCl3 (d) [AlCl4]−

How are metals used as semiconductors refined? What is the principle of the method used like germanium, silicon etc?

Why does entropy increases when we dissolute iodine in a solvent ?

What is the oxidation number of the central metal atom in the coordination compound [Pt(NH3)3Cl]Cl?

The wavelength of radiation which would cause the photodissociation of chlorine molecule if the Cl−Cl bond energy is 243 kJ mol−1 is (h = 6.6×10−34Js).

I want to find out whether a molecule is ionic or covalent like I am specifically talking about the complex ones.

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

Colloidal sols shows brownian movement . Does true solution also shows ? If yes or no then"why"?

What is borax? How to prepare it and what are its chemical properties?

Addition of dihydrogen to propyne forms:

Which of the following has been arranged in the order of increasing bond strength?

In the following carbocations, the stability order is:

Identify the correct labels of A, B and C in the following graph from the options given below: Root mean square speed (Vrms); most probable speed (Vmp); average speed (Vav)

7% by weight of earth's crust is made up of the white, shiny and highly reactive metal called __.

100 ml of 0.2 molar acetic acid with 50 ml of 0.1 M and magnesium Hydroxide calculate the pH of the final solution

Which of the following is not paramagnetic:

The empirical formula of a gaseous fluorocarbon is CF2. At a certian temperature and pressure, a 1 L volume hold 8.95 g of this fluorocarbon. Under the same conditions, 1 L volume holds only 1.70 g gaseous F2. Thus, fluorocarbon is_______. (F = 19)

Which of the following shows maximum molar conductance ?

How rate of loss of heat = massspecific heatrate of fall of temperature