46295 + Interview Questions in Chemistry

1.	An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon. The ester formed will be 1. optically active mixture 2. pure enantiomer 3. meso compound 4. racemic mixture
Answer» An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon. The ester formed will be 1. optically active mixture 2. pure enantiomer 3. meso compound 4. racemic mixture

Discussion

2.	A refrigerating unit working on Bell Coleman cycle takes air from cold chamber at −10∘c and compressed it from 1 bar to 6.5 bar with index of compression being 1.2. The compressed air is cooled to a temperature of 30∘C before it is expanded in the expander, where the index of expansion is 1.35. What is the refrigerating effect?
Answer» A refrigerating unit working on Bell Coleman cycle takes air from cold chamber at $- 10^{\circ} c$ and compressed it from 1 bar to 6.5 bar with index of compression being 1.2. The compressed air is cooled to a temperature of $30^{\circ} C$ before it is expanded in the expander, where the index of expansion is 1.35. What is the refrigerating effect?

Discussion

3.	Acetic acid dissolved in benzene shows a molecular weight of:
Answer» Acetic acid dissolved in benzene shows a molecular weight of:

Discussion

4.	The reaction of chloroform with alcoholic KOH and p - toluidine forms
Answer» The reaction of chloroform with alcoholic KOH and p - toluidine forms

Discussion

5.	Lithium metal crystallizes in a body-centered cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of lithium will be:
Answer» Lithium metal crystallizes in a body-centered cubic crystal. If the length of the side of the unit cell of lithium is $351 pm$ , the atomic radius of lithium will be:

Discussion

6.	In a the hall process, aluminum is produced by the electrolysis of molten Al2O3 by the following reactions. How many second would it take to produce enough aluminum by the Hall process to make a case of 24 cans of aluminum soft-drink, if each can uses 5.0 g of Al, a current of 9650 amp is employed, and the current efficiency of the cell is 90% :
Answer» In a the hall process, aluminum is produced by the electrolysis of molten $A l_{2} O_{3}$ by the following reactions. How many second would it take to produce enough aluminum by the Hall process to make a case of 24 cans of aluminum soft-drink, if each can uses $5.0 g o f A l,$ a current of 9650 amp is employed, and the current efficiency of the cell is $90 %$ :

Discussion

7.	Which of the following carboxylic acids can be decarboxylated readily by heating to 100−150oC?
Answer» Which of the following carboxylic acids can be decarboxylated readily by heating to $100 - 150^{o} C$ ?

Discussion

8.	11. Is order of reactivity towards EAS different the order of basicity of the compound?
Answer» 11. Is order of reactivity towards EAS different the order of basicity of the compound?

Discussion

9.	30.Order of strength of melting point- HF,H2O,NH3
Answer» 30.Order of strength of melting point- HF,H2O,NH3

Discussion

10.	Explain in detail formation of an isotone and isobar with relevant equation
Answer» Explain in detail formation of an isotone and isobar with relevant equation

Discussion

11.	Which of the following is non-metallic?
Answer» Which of the following is non-metallic?

Discussion

12.	30. Consider the reaction sequence S8 + 8So2 gives 8So2. 2So2 + O2 gives 2So3. how many grams of So3 are produced from 1mole S8. (1) 1280. (2)960. (3)640. (4)320
Answer» 30. Consider the reaction sequence S8 + 8So2 gives 8So2. 2So2 + O2 gives 2So3. how many grams of So3 are produced from 1mole S8. (1) 1280. (2)960. (3)640. (4)320

Discussion

13.	Which carbocation is more stable allylic or tertiary ?
Answer» Which carbocation is more stable allylic or tertiary ?

Discussion

14.	If the electrical resistance of a column of 0.1 mol L NaOH solution diamete 1cm length 10cm is 5 ×103 ohm what would be the molar conductivity of the solution
Answer» If the electrical resistance of a column of 0.1 mol L NaOH solution diamete 1cm length 10cm is 5 ×103 ohm what would be the molar conductivity of the solution

Discussion

15.	A sample of 2,3-dibromo-3-methylpentane is heated with zinc dust. Identify which is the structure that represents the organic product formed in the reaction.
Answer» A sample of 2,3-dibromo-3-methylpentane is heated with zinc dust. Identify which is the structure that represents the organic product formed in the reaction.

Discussion

16.	14.Why there is Greater repulsion between lone pair lone pair electrons as compared to lone pair Bond pair electrons and Bond pair Bond pair electrons.
Answer» 14.Why there is Greater repulsion between lone pair lone pair electrons as compared to lone pair Bond pair electrons and Bond pair Bond pair electrons.

Discussion

17.	72.Hydrogenation of vegetable oilis what kind of reaction and what hydrogenation basically is
Answer» 72.Hydrogenation of vegetable oilis what kind of reaction and what hydrogenation basically is

Discussion

18.	A is
Answer» A is

Discussion

19.	How many Statements are correct below?A. Groups showing +I effect stabilize electron deficient species and destabilize electron rich species.B. Groups showing +I effect destabilize electron deficient and electron rich species.C. Groups showing −I effect stabilize electron rich species and destabilize electron deficient species.D. Groups showing −I effect stabilize electron deficient species and stabilize electron rich species.
Answer» How many Statements are correct below? A. Groups showing $+ I$ effect stabilize electron deficient species and destabilize electron rich species. B. Groups showing $+ I$ effect destabilize electron deficient and electron rich species. C. Groups showing $- I$ effect stabilize electron rich species and destabilize electron deficient species. D. Groups showing $- I$ effect stabilize electron deficient species and stabilize electron rich species.

Discussion

20.	What is closed shell electronic configuration?
Answer» What is closed shell electronic configuration?

Discussion

21.	What would be the product when propene reacts with chlorine in presence of CCl4
Answer» What would be the product when propene reacts with chlorine in presence of $C C l_{4}$

Discussion

22.	A compound X undergoes tetramerisation in a given organic solvent. The van ’t Hoff factor ‘i’ is calculated as 0.05y. Find y. (Assuming 100% association)
Answer» A compound X undergoes tetramerisation in a given organic solvent. The van ’t Hoff factor ‘i’ is calculated as 0.05y. Find y. (Assuming 100% association)

Discussion

23.	Which of the following complexes is not expected to exhibit optical isomerism ?
Answer» Which of the following complexes is not expected to exhibit optical isomerism ?

Discussion

24.	46. Write the physical states of reactants and products in the following reaction and balance it Ba(OH)2 + NH4Cl - BaCl2 + NH3 + H2O Ba
Answer» 46. Write the physical states of reactants and products in the following reaction and balance it Ba(OH)2 + NH4Cl - BaCl2 + NH3 + H2O Ba

Discussion

25.	Which one of the following is not an unsaturated compound?
Answer» Which one of the following is not an unsaturated compound?

Discussion

26.	Mendeleev's Periodic law is based on
Answer» Mendeleev's Periodic law is based on

Discussion

27.	Question 42 What is an ionic bond? With tw suitable examples the difference between an ionic and a covalent bond?
Answer» Question 42 What is an ionic bond? With tw suitable examples the difference between an ionic and a covalent bond?

27.

Question 42 What is an ionic bond? With tw suitable examples the difference between an ionic and a covalent bond?

Answer»

Question 42

What is an ionic bond? With tw suitable examples the difference between an ionic and a covalent bond?

Discussion

28.	On heating ethylene dichloride with alcoholic potash, the product formed is
Answer» On heating ethylene dichloride with alcoholic potash, the product formed is

Discussion

29.	The number of sigma bond(s) in P4O7 is/are
Answer» The number of sigma bond(s) in $P_{4} O_{7}$ is/are

Discussion

30.	Ice crystallize in hexagonal lattice having volume of unit cell as 13210*-24 cm3. If density of ice at given temperature is .92gcm-3. Then number of h2o molecules per unit cell is
Answer» Ice crystallize in hexagonal lattice having volume of unit cell as 13210*-24 cm3. If density of ice at given temperature is .92gcm-3. Then number of h2o molecules per unit cell is

Discussion

31.	How many grams of oxygen is required to completely react with 0.2 g of hydrogen to yield water?
Answer» How many grams of oxygen is required to completely react with $0.2 g$ of hydrogen to yield water?

Discussion

32.	Correct order of increasing activity is
Answer» Correct order of increasing activity is

Discussion

33.	Why diazonium salt is formed only from primary amines
Answer» Why diazonium salt is formed only from primary amines

Discussion

34.	what is collidal platinum
Answer» what is collidal platinum

Discussion

35.	For any f orbital, the values of magnetic quantum number m are:
Answer» For any f orbital, the values of magnetic quantum number m are:

Discussion

36.	van't Hoff factor for 1M ideal solution is
Answer» van't Hoff factor for 1M ideal solution is

Discussion

37.	A reaction is firstorder in A and second order in B.(i) Write thedifferential rate equation.(ii) How isthe rate affected on increasing the concentration of B three times?(iii) How isthe rate affected when the concentrations of both A and B aredoubled?
Answer» A reaction is first order in A and second order in B. (i) Write the differential rate equation. (ii) How is the rate affected on increasing the concentration of B three times? (iii) How is the rate affected when the concentrations of both A and B are doubled?

37.

A reaction is firstorder in A and second order in B.(i) Write thedifferential rate equation.(ii) How isthe rate affected on increasing the concentration of B three times?(iii) How isthe rate affected when the concentrations of both A and B aredoubled?

Answer»

A reaction is first
order in A and second order in B.

(i)
Write the
differential rate equation.

(ii)
How is
the rate affected on increasing the concentration of B three times?

(iii)
How is
the rate affected when the concentrations of both A and B are
doubled?

Discussion

38.	What is relative lowering of vapour pressure?
Answer» What is relative lowering of vapour pressure?

Discussion

39.	The wavelength of the energy emitted when the electron comes from fourth orbit to second orbit in hydrogen is 20.397 cm. The wavelength of energy for the same transition in He+ is
Answer» The wavelength of the energy emitted when the electron comes from fourth orbit to second orbit in hydrogen is $20.397 cm$ . The wavelength of energy for the same transition in $H e^{+}$ is

Discussion

40.	If,find.
Answer» If, find.

Discussion

41.	88 What are the structural isomers of hexane ? Also draw their electron-dot structure.?
Answer» 88 What are the structural isomers of hexane ? Also draw their electron-dot structure.?

Discussion

42.	16.There are 3 electrons in one orbital than how many elements will be present in sixth period of long form of periodic table ?
Answer» 16.There are 3 electrons in one orbital than how many elements will be present in sixth period of long form of periodic table ?

Discussion

43.	Given the polymers (i) Nylon-6,6 (ii) Buna-S (iii) Polythene. Arrange these in the increasing order of their intermolecular forces (Lower to higher)
Answer» Given the polymers (i) Nylon-6,6 (ii) Buna-S (iii) Polythene. Arrange these in the increasing order of their intermolecular forces (Lower to higher)

Discussion

44.	In isocyanide triple bond exist bw C and N or double bond
Answer» In isocyanide triple bond exist bw C and N or double bond

Discussion

45.	A mixture of N2 and Ar gases in a cylinder contains 7 g of N2 and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of N2 is :[Use atomic masses (in g mol−1):N=14,Ar=40]
Answer» A mixture of $N_{2}$ and Ar gases in a cylinder contains $7 g$ of $N_{2}$ and $8 g$ of $A r$ . If the total pressure of the mixture of the gases in the cylinder is $27 b a r$ , the partial pressure of $N_{2}$ is : [Use atomic masses (in $g m o l^{- 1}) : N = 14, A r = 40$ ]

Discussion

46.	what is diff b/w alpha and beta elimination
Answer» what is diff b/w alpha and beta elimination

Discussion

47.	A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behaviour is the characteristic of substances forming[BHU 2000]
Answer» A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behaviour is the characteristic of substances forming [BHU 2000]

47.

A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behaviour is the characteristic of substances forming[BHU 2000]

Answer»

A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behaviour is the characteristic of substances forming

[BHU 2000]

Discussion

48.	A sugar syrup (containing sugar and water only) of weight 214.2 g contains 34.2 g of sugar (C12H22O11). Find the mole fraction of the sugar in the syrup.
Answer» A sugar syrup (containing sugar and water only) of weight 214.2 g contains 34.2 g of sugar ( $C_{12} H_{22} O_{11}$ ). Find the mole fraction of the sugar in the syrup.

Discussion

49.

Determine volume occupied by 4.75g acetylene gas at 740 mmHg pressure & 500C temperature R= 0.0826 Latm/mol k in (in L) 5

Answer»

Determine volume occupied by 4.75g acetylene gas at 740 mmHg pressure &

500C temperature

R= 0.0826 Latm/mol k in (in L)

5

Discussion

50.	19. relation ship between radius of tetrahedral void and radius of atom in closed packing
Answer» 19. relation ship between radius of tetrahedral void and radius of atom in closed packing

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon. The ester formed will be 1. optically active mixture 2. pure enantiomer 3. meso compound 4. racemic mixture

Acetic acid dissolved in benzene shows a molecular weight of:

The reaction of chloroform with alcoholic KOH and p - toluidine forms

Lithium metal crystallizes in a body-centered cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of lithium will be:

Which of the following carboxylic acids can be decarboxylated readily by heating to 100−150oC?

11. Is order of reactivity towards EAS different the order of basicity of the compound?

30.Order of strength of melting point- HF,H2O,NH3

Explain in detail formation of an isotone and isobar with relevant equation

Which of the following is non-metallic?

30. Consider the reaction sequence S8 + 8So2 gives 8So2. 2So2 + O2 gives 2So3. how many grams of So3 are produced from 1mole S8. (1) 1280. (2)960. (3)640. (4)320

Which carbocation is more stable allylic or tertiary ?

If the electrical resistance of a column of 0.1 mol L NaOH solution diamete 1cm length 10cm is 5 ×103 ohm what would be the molar conductivity of the solution

A sample of 2,3-dibromo-3-methylpentane is heated with zinc dust. Identify which is the structure that represents the organic product formed in the reaction.

14.Why there is Greater repulsion between lone pair lone pair electrons as compared to lone pair Bond pair electrons and Bond pair Bond pair electrons.

72.Hydrogenation of vegetable oilis what kind of reaction and what hydrogenation basically is

A is

What is closed shell electronic configuration?

What would be the product when propene reacts with chlorine in presence of CCl4

A compound X undergoes tetramerisation in a given organic solvent. The van ’t Hoff factor ‘i’ is calculated as 0.05y. Find y. (Assuming 100% association)

Which of the following complexes is not expected to exhibit optical isomerism ?

46. Write the physical states of reactants and products in the following reaction and balance it Ba(OH)2 + NH4Cl - BaCl2 + NH3 + H2O Ba

Which one of the following is not an unsaturated compound?

Mendeleev's Periodic law is based on

Question 42 What is an ionic bond? With tw suitable examples the difference between an ionic and a covalent bond?

On heating ethylene dichloride with alcoholic potash, the product formed is

The number of sigma bond(s) in P4O7 is/are

Ice crystallize in hexagonal lattice having volume of unit cell as 13210*-24 cm3. If density of ice at given temperature is .92gcm-3. Then number of h2o molecules per unit cell is

How many grams of oxygen is required to completely react with 0.2 g of hydrogen to yield water?

Correct order of increasing activity is

Why diazonium salt is formed only from primary amines

what is collidal platinum

For any f orbital, the values of magnetic quantum number m are:

van't Hoff factor for 1M ideal solution is

A reaction is firstorder in A and second order in B.(i) Write thedifferential rate equation.(ii) How isthe rate affected on increasing the concentration of B three times?(iii) How isthe rate affected when the concentrations of both A and B aredoubled?

What is relative lowering of vapour pressure?

The wavelength of the energy emitted when the electron comes from fourth orbit to second orbit in hydrogen is 20.397 cm. The wavelength of energy for the same transition in He+ is

If,find.

88 What are the structural isomers of hexane ? Also draw their electron-dot structure.?

16.There are 3 electrons in one orbital than how many elements will be present in sixth period of long form of periodic table ?

Given the polymers (i) Nylon-6,6 (ii) Buna-S (iii) Polythene. Arrange these in the increasing order of their intermolecular forces (Lower to higher)

In isocyanide triple bond exist bw C and N or double bond

A mixture of N2 and Ar gases in a cylinder contains 7 g of N2 and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of N2 is :[Use atomic masses (in g mol−1):N=14,Ar=40]

what is diff b/w alpha and beta elimination

A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behaviour is the characteristic of substances forming[BHU 2000]

A sugar syrup (containing sugar and water only) of weight 214.2 g contains 34.2 g of sugar (C12H22O11). Find the mole fraction of the sugar in the syrup.

Determine volume occupied by 4.75g acetylene gas at 740 mmHg pressure &amp; 500C temperature R= 0.0826 Latm/mol k in (in L) 5

19. relation ship between radius of tetrahedral void and radius of atom in closed packing

Determine volume occupied by 4.75g acetylene gas at 740 mmHg pressure & 500C temperature R= 0.0826 Latm/mol k in (in L) 5