46295 + Interview Questions in Chemistry

1.	The amines formed when (I) and (II) undergo Hofmann rearrangement are:
Answer» The amines formed when (I) and (II) undergo Hofmann rearrangement are:

Discussion

2.	Orion has monomeric unit
Answer» Orion has monomeric unit

Discussion

3.	the s†an dard heat of formation of NO2 (g) and N2O4(g) are 8 and 4 Kcal mol^{-1} respectively the heat of dimerisation of NO2 in Kcal is
Answer» the s†an dard heat of formation of NO2 (g) and N2O4(g) are 8 and 4 Kcal mol^{-1} respectively the heat of dimerisation of NO2 in Kcal is

Discussion

4.	What is meant by sn1,sn2,sn3 reactions explain briefly and give difference between them and state 10 examples each Question is for 7 marks So please keep it somewhat big
Answer» What is meant by sn1,sn2,sn3 reactions explain briefly and give difference between them and state 10 examples each Question is for 7 marks So please keep it somewhat big

4.

What is meant by sn1,sn2,sn3 reactions explain briefly and give difference between them and state 10 examples each Question is for 7 marks So please keep it somewhat big

Answer»

What is meant by sn1,sn2,sn3 reactions explain briefly and give difference between them and state 10 examples each

Question is for 7 marks

So please keep it somewhat big

Discussion

5.	The compound with the lowest boiling point among the following is:
Answer» The compound with the lowest boiling point among the following is:

Discussion

6.	Amongstthe following compounds, identify which are insoluble, partiallysoluble and highly soluble in water?(i) phenol (ii) toluene (iii) formic acid(iv) ethyleneglycol (v) chloroform (vi) pentanol.
Answer» Amongst the following compounds, identify which are insoluble, partially soluble and highly soluble in water? (i) phenol (ii) toluene (iii) formic acid (iv) ethylene glycol (v) chloroform (vi) pentanol.

6.

Amongstthe following compounds, identify which are insoluble, partiallysoluble and highly soluble in water?(i) phenol (ii) toluene (iii) formic acid(iv) ethyleneglycol (v) chloroform (vi) pentanol.

Answer»

Amongst
the following compounds, identify which are insoluble, partially
soluble and highly soluble in water?

(i)
phenol (ii)
toluene (iii)
formic acid

(iv)
ethylene
glycol (v)
chloroform
(vi)
pentanol.

Discussion

7.	Equal volumes of three monoprotic acid solutions of pH 3,4 and 5 are mixed in a vessel. What will be the resulting H+ ion concentration in the mixture?
Answer» Equal volumes of three monoprotic acid solutions of $pH 3, 4$ and $5$ are mixed in a vessel. What will be the resulting $H^{+}$ ion concentration in the mixture?

Discussion

8.	An aqueous solution of CoCl2 on addition of excess of concentrated HCl turns blue due to formation of :
Answer» An aqueous solution of $C o C l_{2}$ on addition of excess of concentrated $H C l$ turns blue due to formation of :

Discussion

9.	A person repairing cycles finds that the time spent on the cycles has exponential distribution with mean 25 minutes. If the cycle's arrival is approximately Poisson with an average rate of 12 for 8 hour days. What is the expected number of cycles in the system ?
Answer» A person repairing cycles finds that the time spent on the cycles has exponential distribution with mean 25 minutes. If the cycle's arrival is approximately Poisson with an average rate of 12 for 8 hour days. What is the expected number of cycles in the system ?

Discussion

10.	The order of reactivities of the following alkyl halides for a SN2 reaction is:
Answer» The order of reactivities of the following alkyl halides for a $S_{N} 2$ reaction is:

Discussion

11.	Assertion :- M.P. of NH3 > HF but reverse is true for their B.P. Reason :- NH3 is non-polar.
Answer» Assertion :- M.P. of NH3 > HF but reverse is true for their B.P. Reason :- NH3 is non-polar.

Discussion

12.	In Al2Cl6, which statement is incorrect-
Answer» In $A l_{2} C l_{6}$ , which statement is incorrect-

Discussion

13.	Which of the following has fractional bond order?
Answer» Which of the following has fractional bond order?

Discussion

14.	How many of the following are bridge elements in Mendeleev's table?
Answer» How many of the following are bridge elements in Mendeleev's table?

Discussion

15.	Calculate energy of 2 moles of photons of radiation whose frequency is 5×1014 Hz
Answer» Calculate energy of 2 moles of photons of radiation whose frequency is $5 \times 10^{14} H z$

Discussion

16.	How to calculate formal charge of an atom in short process ?
Answer» How to calculate formal charge of an atom in short process ?

Discussion

17.	What will be the geometrical and optical isomers for Ma3b2c ?
Answer» What will be the geometrical and optical isomers for Ma3b2c ?

Discussion

18.	Which of the following reasons enable a catalyst to increase the rate of a chemical reaction?
Answer» Which of the following reasons enable a catalyst to increase the rate of a chemical reaction?

Discussion

19.	A rec†an gular vessel when full of water,takes 10 min to be emptied through an orifice at the botttom .How much time will it take to be emptied when half filled with water?
Answer» A rec†an gular vessel when full of water,takes 10 min to be emptied through an orifice at the botttom .How much time will it take to be emptied when half filled with water?

Discussion

20.	42 The vapour pressure of pure benzene at 88^° C is 957 mm and that of toluene at the same temperature is 379.5 mm. calculate the composition of benzene-toluene mixture boiling at 88^° C:
Answer» 42 The vapour pressure of pure benzene at 88^° C is 957 mm and that of toluene at the same temperature is 379.5 mm. calculate the composition of benzene-toluene mixture boiling at 88^° C:

Discussion

21.	10. How to convert ethyl benzene to benzene
Answer» 10. How to convert ethyl benzene to benzene

Discussion

22.	The ionization enthalpy of Cs is 375.6kg/mol what is the energy required to convert 2.66mg of gaseous Cs completely to Cs+.(mass of cs= 133)
Answer» The ionization enthalpy of Cs is 375.6kg/mol what is the energy required to convert 2.66mg of gaseous Cs completely to Cs+.(mass of cs= 133)

Discussion

23.	two electrons are release toward each other with equal velocities of 10^6 m/s what will be the closest appoach between them.
Answer» two electrons are release toward each other with equal velocities of 10^6 m/s what will be the closest appoach between them.

Discussion

24.	When a metal rod M is dipped into an aqueous colourless concentrated solution of AgNO3, the solution turns light blue. Addition of aqueous NaCl to the blue solution gives a white precipitate O. Addition of aqueous NH3 dissolves O and gives an intense blue solution. The metal rod M is
Answer» When a metal rod $M$ is dipped into an aqueous colourless concentrated solution of $A g N O_{3}$ , the solution turns light blue. Addition of aqueous $N a C l$ to the blue solution gives a white precipitate O. Addition of aqueous $N H_{3}$ dissolves $O$ and gives an intense blue solution. The metal rod $M$ is

Discussion

25.	17. How to balance this equation BaCl +H2SO4 =BaSO4 +HCL
Answer» 17. How to balance this equation BaCl +H2SO4 =BaSO4 +HCL

Discussion

26.	Is glyptal biodegradable polymer?
Answer» Is glyptal biodegradable polymer?

Discussion

27.	Reaction of R-2-bromobutane with aqueous KOH follows two parallel reactions, one by SN2 (complete inversion) and other by SN1 (complete racemization). Specific optical activity for R-2-butanol is −13.50∘/gmL per dm length of the polarimeter.If in a 10 cm tube polarimeter, 10 ml of R-2-bromobutane along with KOH is filled, then after complete reaction of R-2-bromobutane, the mass of all alcohols formed is found equal to 5 g of which 1 g is of R-2-butanol. Then, the total optical rotation (in degree) of the solution is
Answer» Reaction of R-2-bromobutane with aqueous KOH follows two parallel reactions, one by $S_{N} 2$ (complete inversion) and other by $S_{N} 1$ (complete racemization). Specific optical activity for R-2-butanol is $- {13.50}^{\circ} / g m L$ per dm length of the polarimeter. If in a 10 cm tube polarimeter, 10 ml of R-2-bromobutane along with KOH is filled, then after complete reaction of R-2-bromobutane, the mass of all alcohols formed is found equal to 5 g of which 1 g is of R-2-butanol. Then, the total optical rotation (in degree) of the solution is

Discussion

28.	What is equivalent conductance?
Answer» What is equivalent conductance?

Discussion

29.	Does CH²=CH-Cl have back bonding
Answer» Does CH²=CH-Cl have back bonding

Discussion

30.	Which element has greatest tendency to lose electrons?
Answer» Which element has greatest tendency to lose electrons?

Discussion

31.	68. When equal masses of CO2, CO,NH3, O2 aretaken in a closed container, then partial pressureof which gas will be maximum?(1) CO2(2) CO(3) NH3(4) O2
Answer» 68. When equal masses of CO2, CO,NH3, O2 aretaken in a closed container, then partial pressureof which gas will be maximum?(1) CO2(2) CO(3) NH3(4) O2

Discussion

32.	Which of the following is an endothermic reaction
Answer» Which of the following is an endothermic reaction

Discussion

33.	Highest melting point would be of 1.AlCl32.LiCl3.NaCl4.BeCl2 Explain how
Answer» Highest melting point would be of $1. A l C l_{3}$ $2. L i C l$ $3. N a C l$ $4. B e C l_{2}$ Explain how

33.

Highest melting point would be of 1.AlCl32.LiCl3.NaCl4.BeCl2 Explain how

Answer»

Highest melting point would be of

$1. A l C l_{3}$

$2. L i C l$

$3. N a C l$

$4. B e C l_{2}$

Explain how

Discussion

34.	Liquids A and B form ideal solution over the entire range of composition. At temperature T, equimolar binary solution of liquids A and B has vapour pressure 45 torr. At the same temperature, a new solution of A and B having mole fractions xA and xB, respectively, has vapour pressure of 22.5 torr. The value of xAxB in the new solution is .(Given that the vapour pressure of pure liquid A is 20 Torr at temperature T)
Answer» Liquids A and B form ideal solution over the entire range of composition. At temperature T, equimolar binary solution of liquids A and B has vapour pressure $45 torr$ . At the same temperature, a new solution of A and B having mole fractions $x_{A}$ and $x_{B}$ , respectively, has vapour pressure of $22.5 torr$ . The value of $\frac{x_{A}}{x_{B}}$ in the new solution is . (Given that the vapour pressure of pure liquid A is 20 Torr at temperature T)

Discussion

35.	6.Write only the reactions of metal reacts with chlorobenzene ?
Answer» 6.Write only the reactions of metal reacts with chlorobenzene ?

Discussion

36.	The elevation in boiling point of solution of 10g of a binary electrolyte ( molar mass 100) in 100g of water is Tb. The value of Kb for water is what?
Answer» The elevation in boiling point of solution of 10g of a binary electrolyte ( molar mass 100) in 100g of water is Tb. The value of Kb for water is what?

Discussion

37.	The volume occupied by 0.402g of n2o4 under a pressure of 753mm and 65°C is 241 ml .calculate the apparent molecular weight and degree of dissociation of n2o4
Answer» The volume occupied by 0.402g of n2o4 under a pressure of 753mm and 65°C is 241 ml .calculate the apparent molecular weight and degree of dissociation of n2o4

Discussion

38.	Conc H2SO4 is 98%by mass and has density of 1.84g cm-3 what volume of conc acid is required to make 5l of .5 M H2SO4
Answer» Conc H2SO4 is 98%by mass and has density of 1.84g cm-3 what volume of conc acid is required to make 5l of .5 M H2SO4

Discussion

39.	How many mL of ethanol should be added in 250mL of Water to obtain a solution containing 80% V/V of solvent?
Answer» How many mL of ethanol should be added in 250mL of Water to obtain a solution containing 80% V/V of solvent?

Discussion

40.	Which of the following compound is having maximum number of atoms in same plane?
Answer» Which of the following compound is having maximum number of atoms in same plane?

Discussion

41.	A compound has cubical unit cell in which X atoms are present at 4 corners , Y atoms are present at the remaining corners and only at those face center(s) which is/are not opposite to each other. The formula for the compound will be:
Answer» A compound has cubical unit cell in which X atoms are present at 4 corners , Y atoms are present at the remaining corners and only at those face center(s) which is/are not opposite to each other. The formula for the compound will be:

Discussion

42.	Major product for the reaction given below:
Answer» Major product for the reaction given below:

Discussion

43.	Three concentric spherical shells A,B and C of radius a,b and c respectively. If cells A and C are given charges q and -q respectively and shell B is earthed. Find the charges appearing on the surface of B & C
Answer» Three concentric spherical shells A,B and C of radius a,b and c respectively. If cells A and C are given charges q and -q respectively and shell B is earthed. Find the charges appearing on the surface of B & C

Discussion

44.	A rec†an gular block of glass PQRS has a refractive index 1.6. A pin O is placed midway on the face PQ. When observed from the QR, the pin shall Options: Appear to be near P Should have chosen Appear to be near Q Appear to be midway of PS Appear to be midway of SR
Answer» A rec†an gular block of glass PQRS has a refractive index 1.6. A pin O is placed midway on the face PQ. When observed from the QR, the pin shall Options: Appear to be near P Should have chosen Appear to be near Q Appear to be midway of PS Appear to be midway of SR

Discussion

45.	1.1 mole of A is mixed with 1.2 mol of B and themixture is kept in a 1 L flask till the equilibriumA+2B 2C+D is reached. At equilibrium0.1 mol of D is formed. The K of the reaction(1) 0.002(2) 0.004(3) 0.001(4) 0.003
Answer» 1.1 mole of A is mixed with 1.2 mol of B and themixture is kept in a 1 L flask till the equilibriumA+2B 2C+D is reached. At equilibrium0.1 mol of D is formed. The K of the reaction(1) 0.002(2) 0.004(3) 0.001(4) 0.003

Discussion

46.	Consider the following reaction CH_3CH_3CH_3-C-CH=CH_2.Major products A and B respectively with H3O+ and Hg(OAc)2,NaBH4/OH- i
Answer» Consider the following reaction CH_3CH_3CH_3-C-CH=CH_2.Major products A and B respectively with H3O+ and Hg(OAc)2,NaBH4/OH- i

Discussion

47.	Similarity & difference between Lewis base & Reducing agent?
Answer» Similarity & difference between Lewis base & Reducing agent?

Discussion

48.	Consider the salt AgCN present in acidic medium having H+ concentration equal to c M.If s is the solubility of AgCN, Ka is the acid dissociation constant of HCN and Ksp is the solubility product of AgCN.Find the value of Ksp(Ka)HCNAssume (Ka)HCN to have a fairly low value.
Answer» Consider the salt $A g C N$ present in acidic medium having $H^{+}$ concentration equal to $c M$ . If $s$ is the solubility of $A g C N$ , $K_{a}$ is the acid dissociation constant of $H C N$ and $K_{s p}$ is the solubility product of $A g C N$ . Find the value of $\frac{K_{s p}}{(K_{a})_{H C N}}$ Assume $(K_{a})_{H C N}$ to have a fairly low value.

Discussion

49.	600ml of a mixture of CO and CO2 weight 1g at NTP. What is the volume of CO2 in the mixture at NTP?
Answer» 600ml of a mixture of CO and CO2 weight 1g at NTP. What is the volume of CO2 in the mixture at NTP?

Discussion

50.	Please explain "Composition of Relations".
Answer» Please explain "Composition of Relations".

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The amines formed when (I) and (II) undergo Hofmann rearrangement are:

Orion has monomeric unit

the s†an dard heat of formation of NO2 (g) and N2O4(g) are 8 and 4 Kcal mol^{-1} respectively the heat of dimerisation of NO2 in Kcal is

What is meant by sn1,sn2,sn3 reactions explain briefly and give difference between them and state 10 examples each Question is for 7 marks So please keep it somewhat big

The compound with the lowest boiling point among the following is:

Amongstthe following compounds, identify which are insoluble, partiallysoluble and highly soluble in water?(i) phenol (ii) toluene (iii) formic acid(iv) ethyleneglycol (v) chloroform (vi) pentanol.

Equal volumes of three monoprotic acid solutions of pH 3,4 and 5 are mixed in a vessel. What will be the resulting H+ ion concentration in the mixture?

An aqueous solution of CoCl2 on addition of excess of concentrated HCl turns blue due to formation of :

A person repairing cycles finds that the time spent on the cycles has exponential distribution with mean 25 minutes. If the cycle's arrival is approximately Poisson with an average rate of 12 for 8 hour days. What is the expected number of cycles in the system ?

The order of reactivities of the following alkyl halides for a SN2 reaction is:

Assertion :- M.P. of NH3 > HF but reverse is true for their B.P. Reason :- NH3 is non-polar.

In Al2Cl6, which statement is incorrect-

Which of the following has fractional bond order?

How many of the following are bridge elements in Mendeleev's table?

Calculate energy of 2 moles of photons of radiation whose frequency is 5×1014 Hz

How to calculate formal charge of an atom in short process ?

What will be the geometrical and optical isomers for Ma3b2c ?

Which of the following reasons enable a catalyst to increase the rate of a chemical reaction?

A rec†an gular vessel when full of water,takes 10 min to be emptied through an orifice at the botttom .How much time will it take to be emptied when half filled with water?

42 The vapour pressure of pure benzene at 88^° C is 957 mm and that of toluene at the same temperature is 379.5 mm. calculate the composition of benzene-toluene mixture boiling at 88^° C:

10. How to convert ethyl benzene to benzene

The ionization enthalpy of Cs is 375.6kg/mol what is the energy required to convert 2.66mg of gaseous Cs completely to Cs+.(mass of cs= 133)

two electrons are release toward each other with equal velocities of 10^6 m/s what will be the closest appoach between them.

When a metal rod M is dipped into an aqueous colourless concentrated solution of AgNO3, the solution turns light blue. Addition of aqueous NaCl to the blue solution gives a white precipitate O. Addition of aqueous NH3 dissolves O and gives an intense blue solution. The metal rod M is

17. How to balance this equation BaCl +H2SO4 =BaSO4 +HCL

Is glyptal biodegradable polymer?

What is equivalent conductance?

Does CH²=CH-Cl have back bonding

Which element has greatest tendency to lose electrons?

68. When equal masses of CO2, CO,NH3, O2 aretaken in a closed container, then partial pressureof which gas will be maximum?(1) CO2(2) CO(3) NH3(4) O2

Which of the following is an endothermic reaction

Highest melting point would be of 1.AlCl32.LiCl3.NaCl4.BeCl2 Explain how

6.Write only the reactions of metal reacts with chlorobenzene ?

The elevation in boiling point of solution of 10g of a binary electrolyte ( molar mass 100) in 100g of water is Tb. The value of Kb for water is what?

The volume occupied by 0.402g of n2o4 under a pressure of 753mm and 65°C is 241 ml .calculate the apparent molecular weight and degree of dissociation of n2o4

Conc H2SO4 is 98%by mass and has density of 1.84g cm-3 what volume of conc acid is required to make 5l of .5 M H2SO4

How many mL of ethanol should be added in 250mL of Water to obtain a solution containing 80% V/V of solvent?

Which of the following compound is having maximum number of atoms in same plane?

A compound has cubical unit cell in which X atoms are present at 4 corners , Y atoms are present at the remaining corners and only at those face center(s) which is/are not opposite to each other. The formula for the compound will be:

Major product for the reaction given below:

Three concentric spherical shells A,B and C of radius a,b and c respectively. If cells A and C are given charges q and -q respectively and shell B is earthed. Find the charges appearing on the surface of B & C

A rec†an gular block of glass PQRS has a refractive index 1.6. A pin O is placed midway on the face PQ. When observed from the QR, the pin shall Options: Appear to be near P Should have chosen Appear to be near Q Appear to be midway of PS Appear to be midway of SR

1.1 mole of A is mixed with 1.2 mol of B and themixture is kept in a 1 L flask till the equilibriumA+2B 2C+D is reached. At equilibrium0.1 mol of D is formed. The K of the reaction(1) 0.002(2) 0.004(3) 0.001(4) 0.003

Consider the following reaction CH_3CH_3CH_3-C-CH=CH_2.Major products A and B respectively with H3O+ and Hg(OAc)2,NaBH4/OH- i

Similarity & difference between Lewis base & Reducing agent?

Consider the salt AgCN present in acidic medium having H+ concentration equal to c M.If s is the solubility of AgCN, Ka is the acid dissociation constant of HCN and Ksp is the solubility product of AgCN.Find the value of Ksp(Ka)HCNAssume (Ka)HCN to have a fairly low value.

600ml of a mixture of CO and CO2 weight 1g at NTP. What is the volume of CO2 in the mixture at NTP?

Please explain "Composition of Relations".