46295 + Interview Questions in Chemistry

1.	38. One mole of gaseous aliphatic compound CxHyOz undergo complete combustion. Find the volume of O2, volume of CO2 evolved, volume of O2 required for complete combustion.
Answer» 38. One mole of gaseous aliphatic compound CxHyOz undergo complete combustion. Find the volume of O2, volume of CO2 evolved, volume of O2 required for complete combustion.

Discussion

2.	2-chlorobutane is heated with alcoholic NaOH, the product formed in larger amount is
Answer» 2-chlorobutane is heated with alcoholic NaOH, the product formed in larger amount is

Discussion

3.	Verify:(i) (ii)
Answer» Verify: (i) (ii)

3.

Verify:(i) (ii)

Answer»

Verify:

(i)

(ii)

Discussion

4.	Q10) LHC scientists hope to test the theory of "Supersymmetry". In this context, consider the following statements. 1) The theory of "supersymmetry” predicts that every known particle has a more massive hidden partner 2) Supersymmetry seeks to fill gaps in the General Theory of Relativity Which of the statement(s) given above is/are correct?
Answer» Q10) LHC scientists hope to test the theory of "Supersymmetry". In this context, consider the following statements. 1) The theory of "supersymmetry” predicts that every known particle has a more massive hidden partner 2) Supersymmetry seeks to fill gaps in the General Theory of Relativity Which of the statement(s) given above is/are correct?

4.

Q10) LHC scientists hope to test the theory of "Supersymmetry". In this context, consider the following statements. 1) The theory of "supersymmetry” predicts that every known particle has a more massive hidden partner 2) Supersymmetry seeks to fill gaps in the General Theory of Relativity Which of the statement(s) given above is/are correct?

Answer»

Q10) LHC scientists hope to test the theory of "Supersymmetry". In this context, consider the following statements.

1) The theory of "supersymmetry” predicts that every known particle has a more massive hidden partner

2) Supersymmetry seeks to fill gaps in the General Theory of Relativity

Which of the statement(s) given above is/are correct?

Discussion

5.	What is the difference between iso-, tert- sec- in a organic compound
Answer» What is the difference between iso-, tert- sec- in a organic compound

Discussion

6.	What is diffraction grating and diffraction rings?
Answer» What is diffraction grating and diffraction rings?

Discussion

7.	Given: N2 (g)+3H2 (g)⇌2NH3 (g); K1N2 (g)+O2 (g)⇌2NO (g); K2H2 (g)+12O2 (g)⇌H2O (g); K3Calculate the equilibrium constant for the reaction, 2NH3 (g)+52O2 (g)⇌2NO (g)+3H2O (g)
Answer» Given: $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g); K_{1}$ $N_{2} (g) + O_{2} (g) ⇌ 2 N O (g); K_{2}$ $H_{2} (g) + \frac{1}{2} O_{2} (g) ⇌ H_{2} O (g); K_{3}$ Calculate the equilibrium constant for the reaction, $2 N H_{3} (g) + \frac{5}{2} O_{2} (g) ⇌ 2 N O (g) + 3 H_{2} O (g)$

Discussion

8.	48. How physisorption become chemisorption at high temperature?
Answer» 48. How physisorption become chemisorption at high temperature?

Discussion

9.	why is the electronic configuartion of calcium 2,8,8,2 and not 2,8,9,1
Answer» why is the electronic configuartion of calcium 2,8,8,2 and not 2,8,9,1

Discussion

10.	In a SN2 substitution reaction of the type,R−Br+Cl−DMF−−−→R−Cl+Br−Which one of the following has the highest relative rate?[1 Mark]
Answer» In a $S_{N} 2$ substitution reaction of the type, $R - B r + C l^{-} D M F - -- \to R - C l + B r^{-}$ Which one of the following has the highest relative rate? [1 Mark]

Discussion

11.	Acetic acid CH3COOH can form a dimer (CH3COOH)2 in the gas phase. The dimer is held together by two H - bonds with a total strength of 77.43 kJ per mol of dimer.If at 27∘C, the equilibrium constant for the dimerization is 1.096×103, then calculate the magnitude of ΔS∘ (in kJ) for the reaction:2CH3COOH(g)⇌(CH3COOH)2(g) (Round upto 2 digits after decimal and ln(1.096×103)≈7 and R=8.3 JK−1mol−1)
Answer» Acetic acid $C H_{3} C O O H$ can form a dimer $(C H_{3} C O O H)_{2}$ in the gas phase. The dimer is held together by two H - bonds with a total strength of $77.43 k J p e r m o l$ of dimer. If at $27^{\circ} C$ , the equilibrium constant for the dimerization is $1.096 \times 10^{3}$ , then calculate the magnitude of $Δ S^{\circ}$ (in $k J$ ) for the reaction: $2 C H_{3} C O O H (g) ⇌ (C H_{3} C O O H)_{2} (g)$ (Round upto 2 digits after decimal and $ln (1.096 \times 10^{3}) \approx 7 a n d R = 8.3 J K^{- 1} m o l^{- 1}$ )

Discussion

12.	60.Derivation of expression of velocity of elctromagnetic waves in vaccum
Answer» 60.Derivation of expression of velocity of elctromagnetic waves in vaccum

Discussion

13.	Q 29/33 The number of atoms in 100 g of an FCC crystal withdensity d 10 g/cm and cell edge equal to 100 pm, is equal to
Answer» Q 29/33 The number of atoms in 100 g of an FCC crystal withdensity d 10 g/cm and cell edge equal to 100 pm, is equal to

Discussion

14.	For given molecules :(I) NaNO3(II) BaCl2(III) K4[Fe(CN)6](IV) C6H12O6The increasing order of Van't Hoff factor in aqueous solution is :(Assume complete dissociation wherever applicable)
Answer» For given molecules : $(I) N a N O_{3} (I I) B a C l_{2} (I I I) K_{4} [F e (C N)_{6}] (I V) C_{6} H_{12} O_{6}$ The increasing order of Van't Hoff factor in aqueous solution is : (Assume complete dissociation wherever applicable)

Discussion

15.	20. The solution having minimum boiling point is 1) 0.1M C6H12O6 2) 0.1M NaCl 3) 0.1M CaCl2 4) 0.5M AlCl3
Answer» 20. The solution having minimum boiling point is 1) 0.1M C6H12O6 2) 0.1M NaCl 3) 0.1M CaCl2 4) 0.5M AlCl3

Discussion

16.	Define physical and chemical change and give two suitable examples for each.
Answer» Define physical and chemical change and give two suitable examples for each.

Discussion

17.	What is the name of the cyclohexane conformation?
Answer» What is the name of the cyclohexane conformation?

17.

What is the name of the cyclohexane conformation?

Answer»

What is the name of the cyclohexane conformation?

Discussion

18.	Write the IUPAC name of the following :
Answer» Write the IUPAC name of the following :

Discussion

19.	if the preassure of fixed gas quantity of a gas decreases by 8 times keeping temperature cons†an t the RMS velocity will be
Answer» if the preassure of fixed gas quantity of a gas decreases by 8 times keeping temperature cons†an t the RMS velocity will be

Discussion

20.	[Co(en)2(NO2)(SCN)]+ The total number of possible isomers for the given complex is .
Answer» $[C o (e n)_{2} (N O_{2}) (S C N)]^{+}$ The total number of possible isomers for the given complex is .

Discussion

21.	what will be the pressure required at constant temperature, to compress a gas to 1/4th of its initial volume, if the initial pressure of a gas is 1 atm.
Answer» what will be the pressure required at constant temperature, to compress a gas to $1 / 4^{t h}$ of its initial volume, if the initial pressure of a gas is $1 atm$ .

Discussion

22.	2VO+3Fe2O3 → 6FeO+V2O5.If we start with 2 g of VO and 6 g of Fe2O3, is the limiting reagent. [V = 48 g] [Fe = 56 g]
Answer» $2 V O + 3 F e_{2} O_{3} \to 6 F e O + V_{2} O_{5}$ . If we start with 2 g of $V O$ and 6 g of $F e_{2} O_{3}$ , is the limiting reagent. [V = 48 g] [Fe = 56 g]

Discussion

23.	What are the steps to find common solution of inequalities?(when there are 2or3 inequalities are given)
Answer» What are the steps to find common solution of inequalities?(when there are 2or3 inequalities are given)

Discussion

24.	The number of tetrahedral voids per unit cell in NaCl crystal is ...... (a) 4 (b) 8 (c) twice the number of octahedral voids (d) four times the number of octahedral voids
Answer» The number of tetrahedral voids per unit cell in NaCl crystal is ...... (a) 4 (b) 8 (c) twice the number of octahedral voids (d) four times the number of octahedral voids

24.

The number of tetrahedral voids per unit cell in NaCl crystal is ...... (a) 4 (b) 8 (c) twice the number of octahedral voids (d) four times the number of octahedral voids

Answer»

The number of tetrahedral voids per unit cell in NaCl crystal is ......

(a) 4

(b) 8

(c) twice the number of octahedral voids

(d) four times the number of octahedral voids

Discussion

25.	Cyclo butane on hydrogenation in presence of nickel catalyst gives?
Answer» Cyclo butane on hydrogenation in presence of nickel catalyst gives?

Discussion

26.	The compound CH3CH=CHCH3 and CH3CH2CH=CH2 are
Answer» The compound $C H_{3} C H = C H C H_{3}$ and $C H_{3} C H_{2} C H = C H_{2}$ are

Discussion

27.	How to find the percentage of keto form and enol form in keto enol tautomerism in case of diketones?
Answer» How to find the percentage of keto form and enol form in keto enol tautomerism in case of diketones?

Discussion

28.	When 1g of anhydrous oxalic acid is burnt at 25 ° C , the amount of heat liberated is 2.8 35 kJ. ∆H combustion is
Answer» When 1g of anhydrous oxalic acid is burnt at 25 ° C , the amount of heat liberated is 2.8 35 kJ. ∆H combustion is

Discussion

29.	Two flasks I and II shown below are connected by a valve of negligible volume.When the valve is openend, the final pressure of the system in bar is x×10−2. The value of x is _____.(Integer answer)[Assume - ideal gas: 1 bar=105 Pa.Molar mass of N2=28.0 g mol−1 R=8.31 J mol−1 K−1
Answer» Two flasks $I$ and $I I$ shown below are connected by a valve of negligible volume. When the valve is openend, the final pressure of the system in bar is $x \times 10^{- 2}$ . The value of $x$ is _____. (Integer answer) [Assume - ideal gas: $1 b a r = 10^{5} P a .$ Molar mass of $N_{2} = 28.0 g m o l^{- 1}$ $R = 8.31 J m o l^{- 1} K^{- 1}$

Discussion

30.	Elements which generally exhibit multiple oxidation state and whose ions are usually coloured are
Answer» Elements which generally exhibit multiple oxidation state and whose ions are usually coloured are

Discussion

31.	1) How cubic close packing is fcc and the structure is almost similar to hcp then why its cubic close packing?2) In octahedral voids, there are 6 spheres surrounding the void then why its called octahedral void?
Answer» 1) How cubic close packing is fcc and the structure is almost similar to hcp then why its cubic close packing? 2) In octahedral voids, there are 6 spheres surrounding the void then why its called octahedral void?

Discussion

32.	which of the following compounds is not obtained when the produ ts obtained from the electrolysis of brine are mixed?A)NaCl B) H2 C) Naocl D)cl
Answer» which of the following compounds is not obtained when the produ ts obtained from the electrolysis of brine are mixed?A)NaCl B) H2 C) Naocl D)cl

Discussion

33.	Find the three solution of x = 99.
Answer» Find the three solution of x = 99.

Discussion

34.	32. Which one of the following is supposed to have highest 3rd ionisation enthalpy? Vanadium, chromium, manganese, iron?? why?
Answer» 32. Which one of the following is supposed to have highest 3rd ionisation enthalpy? Vanadium, chromium, manganese, iron?? why?

Discussion

35.	The standard enthalpy of formation of octane (C8H18) is −250 kJ/mol. Calculate the enthalpy of combustion of C8H18.Given : enthalpy of formation of CO2(g) and H2O(l) are −394 kJ/mol and −286 kJ/mol respectively:
Answer» The standard enthalpy of formation of octane (C₈H₁₈) is −250 kJ/mol. Calculate the enthalpy of combustion of C₈H_18. Given : enthalpy of formation of CO₂(g) and H₂O(l) are −394 kJ/mol and −286 kJ/mol respectively:

Discussion

36.	19. What happen when methyl iso cyanide us refuced in presence of lithium. Aluminium hydride (LiALH4)
Answer» 19. What happen when methyl iso cyanide us refuced in presence of lithium. Aluminium hydride (LiALH4)

Discussion

37.	37.At what temperature 25dm of oxygen at 283k is heated to make its volume 30 dm
Answer» 37.At what temperature 25dm of oxygen at 283k is heated to make its volume 30 dm

Discussion

38.	dimension of viscosity
Answer» dimension of viscosity

Discussion

39.	36. Which of the following is correct match? (1) Photochemical smog - SO2 (2) Nitrate in drinking water - blue baby syndrome (3) Phosphate fertilizers in water - BOD level of water increases (4) All are correct
Answer» 36. Which of the following is correct match? (1) Photochemical smog - SO2 (2) Nitrate in drinking water - blue baby syndrome (3) Phosphate fertilizers in water - BOD level of water increases (4) All are correct

Discussion

40.	When NaCl is doped with 1.0×10−3 mole of SrCl2, the number of cation vacancy is ?
Answer» When $N a C l$ is doped with $1.0 \times 10^{- 3}$ mole of $S r C l_{2}$ , the number of cation vacancy is ?

Discussion

41.	Which of the following orders is correct for heat of hydrogenation of these compounds?
Answer» Which of the following orders is correct for heat of hydrogenation of these compounds?

Discussion

42.	During the formation of ammonia, the rate of backward reaction will increase if
Answer» During the formation of ammonia, the rate of backward reaction will increase if

Discussion

43.	19. Mg forms Mg(ll) because of :- 1) The oxidation state of Mg is +2 2) Difference between I. P1 and I. P2 is greater than 16.0 eV 3) There is only one electron in the outermost energy level of Mg 4) Difference between I. P1 and I. P2 is less than 11eV
Answer» 19. Mg forms Mg(ll) because of :- 1) The oxidation state of Mg is +2 2) Difference between I. P1 and I. P2 is greater than 16.0 eV 3) There is only one electron in the outermost energy level of Mg 4) Difference between I. P1 and I. P2 is less than 11eV

Discussion

44.	In acidic medium, hydrogen peroxide changes potassium dichromate to a deep blue compound having two peroxy linkage. choose the correct formula of the compound.
Answer» In acidic medium, hydrogen peroxide changes potassium dichromate to a deep blue compound having two peroxy linkage. choose the correct formula of the compound.

Discussion

45.	A car will hold 2 persons in the front seat and 1 in the rear seat. If among six persons only two can drive, the number of ways, in which the car can be filled is :
Answer» A car will hold $2$ persons in the front seat and $1$ in the rear seat. If among six persons only two can drive, the number of ways, in which the car can be filled is :

Discussion

46.	phenol is less acidic than 1.ethanol 2.onitrophenol 3.o -methylphenol 4.o-methoxy phenol
Answer» phenol is less acidic than 1.ethanol 2.onitrophenol 3.o -methylphenol 4.o-methoxy phenol

Discussion

47.	If two quantities have same dimensions ,do they represent same physical content? And how can force and energy density have same dimensions
Answer» If two quantities have same dimensions ,do they represent same physical content? And how can force and energy density have same dimensions

Discussion

48.	67. Consider the following species: CN+,CN-,NO,CN which one of these will have the highest bond order? 1)CN+ 2)CN 3)CN- 4)NO
Answer» 67. Consider the following species: CN+,CN-,NO,CN which one of these will have the highest bond order? 1)CN+ 2)CN 3)CN- 4)NO

Discussion

49.	How may carbon atoms are there in the simplest bicyclo compound?
Answer» How may carbon atoms are there in the simplest bicyclo compound?

Discussion

50.	Identify the final product (B) of the reaction.C6H5COOH+NaH*CO3 → gas(A)1. CH3MgBr−−−−−−−→2. H3O+(B)[ 14C is represented as ∗C ]
Answer» Identify the final product (B) of the reaction. $C_{6} H_{5} C O O H + N a H * C O_{3} \to g a s (A) 1 . C H_{3} M g B r - ------ \to 2 . H_{3} O^{+} (B)$ $[14 C$ is represented as $* C]$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

38. One mole of gaseous aliphatic compound CxHyOz undergo complete combustion. Find the volume of O2, volume of CO2 evolved, volume of O2 required for complete combustion.

2-chlorobutane is heated with alcoholic NaOH, the product formed in larger amount is

Verify:(i) (ii)

What is the difference between iso-, tert- sec- in a organic compound

What is diffraction grating and diffraction rings?

Given: N2 (g)+3H2 (g)⇌2NH3 (g); K1N2 (g)+O2 (g)⇌2NO (g); K2H2 (g)+12O2 (g)⇌H2O (g); K3Calculate the equilibrium constant for the reaction, 2NH3 (g)+52O2 (g)⇌2NO (g)+3H2O (g)

48. How physisorption become chemisorption at high temperature?

why is the electronic configuartion of calcium 2,8,8,2 and not 2,8,9,1

In a SN2 substitution reaction of the type,R−Br+Cl−DMF−−−→R−Cl+Br−Which one of the following has the highest relative rate?[1 Mark]

60.Derivation of expression of velocity of elctromagnetic waves in vaccum

Q 29/33 The number of atoms in 100 g of an FCC crystal withdensity d 10 g/cm and cell edge equal to 100 pm, is equal to

For given molecules :(I) NaNO3(II) BaCl2(III) K4[Fe(CN)6](IV) C6H12O6The increasing order of Van't Hoff factor in aqueous solution is :(Assume complete dissociation wherever applicable)

20. The solution having minimum boiling point is 1) 0.1M C6H12O6 2) 0.1M NaCl 3) 0.1M CaCl2 4) 0.5M AlCl3

Define physical and chemical change and give two suitable examples for each.

What is the name of the cyclohexane conformation?

Write the IUPAC name of the following :

if the preassure of fixed gas quantity of a gas decreases by 8 times keeping temperature cons†an t the RMS velocity will be

[Co(en)2(NO2)(SCN)]+ The total number of possible isomers for the given complex is .

what will be the pressure required at constant temperature, to compress a gas to 1/4th of its initial volume, if the initial pressure of a gas is 1 atm.

2VO+3Fe2O3 → 6FeO+V2O5.If we start with 2 g of VO and 6 g of Fe2O3, is the limiting reagent. [V = 48 g] [Fe = 56 g]

What are the steps to find common solution of inequalities?(when there are 2or3 inequalities are given)

The number of tetrahedral voids per unit cell in NaCl crystal is ...... (a) 4 (b) 8 (c) twice the number of octahedral voids (d) four times the number of octahedral voids

Cyclo butane on hydrogenation in presence of nickel catalyst gives?

The compound CH3CH=CHCH3 and CH3CH2CH=CH2 are

How to find the percentage of keto form and enol form in keto enol tautomerism in case of diketones?

When 1g of anhydrous oxalic acid is burnt at 25 ° C , the amount of heat liberated is 2.8 35 kJ. ∆H combustion is

Two flasks I and II shown below are connected by a valve of negligible volume.When the valve is openend, the final pressure of the system in bar is x×10−2. The value of x is _____.(Integer answer)[Assume - ideal gas: 1 bar=105 Pa.Molar mass of N2=28.0 g mol−1 R=8.31 J mol−1 K−1

Elements which generally exhibit multiple oxidation state and whose ions are usually coloured are

1) How cubic close packing is fcc and the structure is almost similar to hcp then why its cubic close packing?2) In octahedral voids, there are 6 spheres surrounding the void then why its called octahedral void?

which of the following compounds is not obtained when the produ ts obtained from the electrolysis of brine are mixed?A)NaCl B) H2 C) Naocl D)cl

Find the three solution of x = 99.

32. Which one of the following is supposed to have highest 3rd ionisation enthalpy? Vanadium, chromium, manganese, iron?? why?

The standard enthalpy of formation of octane (C8H18) is −250 kJ/mol. Calculate the enthalpy of combustion of C8H18.Given : enthalpy of formation of CO2(g) and H2O(l) are −394 kJ/mol and −286 kJ/mol respectively:

19. What happen when methyl iso cyanide us refuced in presence of lithium. Aluminium hydride (LiALH4)

37.At what temperature 25dm of oxygen at 283k is heated to make its volume 30 dm

dimension of viscosity

36. Which of the following is correct match? (1) Photochemical smog - SO2 (2) Nitrate in drinking water - blue baby syndrome (3) Phosphate fertilizers in water - BOD level of water increases (4) All are correct

When NaCl is doped with 1.0×10−3 mole of SrCl2, the number of cation vacancy is ?

Which of the following orders is correct for heat of hydrogenation of these compounds?

During the formation of ammonia, the rate of backward reaction will increase if

19. Mg forms Mg(ll) because of :- 1) The oxidation state of Mg is +2 2) Difference between I. P1 and I. P2 is greater than 16.0 eV 3) There is only one electron in the outermost energy level of Mg 4) Difference between I. P1 and I. P2 is less than 11eV

In acidic medium, hydrogen peroxide changes potassium dichromate to a deep blue compound having two peroxy linkage. choose the correct formula of the compound.

A car will hold 2 persons in the front seat and 1 in the rear seat. If among six persons only two can drive, the number of ways, in which the car can be filled is :

phenol is less acidic than 1.ethanol 2.onitrophenol 3.o -methylphenol 4.o-methoxy phenol

If two quantities have same dimensions ,do they represent same physical content? And how can force and energy density have same dimensions

67. Consider the following species: CN+,CN-,NO,CN which one of these will have the highest bond order? 1)CN+ 2)CN 3)CN- 4)NO

How may carbon atoms are there in the simplest bicyclo compound?

Identify the final product (B) of the reaction.C6H5COOH+NaH*CO3 → gas(A)1. CH3MgBr−−−−−−−→2. H3O+(B)[ 14C is represented as ∗C ]