46295 + Interview Questions in Chemistry

1.	ll)danelphthalimidesynthesisAccomplish the following conversions NoNitrobenzene to benzoic acid (Goo MNaNoil) Benzene to m-bromophenol(iii) Benzoic acid to aniline
Answer» ll)danelphthalimidesynthesisAccomplish the following conversions NoNitrobenzene to benzoic acid (Goo MNaNoil) Benzene to m-bromophenol(iii) Benzoic acid to aniline

Discussion

2.	in the dichromate dianion why 6 Cr bond equivalent why not 8 Cr bond equivalen
Answer» in the dichromate dianion why 6 Cr bond equivalent why not 8 Cr bond equivalen

Discussion

3.	1g of dibasic acid is completely neutralised with 100 ml of 0.5 N NAOH solution. what is the molar mass of aci
Answer» 1g of dibasic acid is completely neutralised with 100 ml of 0.5 N NAOH solution. what is the molar mass of aci

Discussion

4.	How to find negationof p implies q
Answer» How to find negationof p implies q

Discussion

5.	The initial pressure of COCl2 is 1000 torr. The total pressure of the system becomes 1500 torr, when the equilibrium COCl2(g)⇌CO(g)+Cl2(g) is attained at constant temperature. The value of kp (in torr) of the reaction is
Answer» The initial pressure of $C O C l_{2}$ is $1000$ torr. The total pressure of the system becomes $1500$ torr, when the equilibrium $C O C l_{2} (g) ⇌ C O (g) + C l_{2} (g)$ is attained at constant temperature. The value of $k_{p}$ (in torr) of the reaction is

Discussion

6.	which of the followung is most acidic? a)o-nitro phenol b)p-nitro pheno
Answer» which of the followung is most acidic? a)o-nitro phenol b)p-nitro pheno

Discussion

7.	The vapour density of a mixture of NO2 and N2O4 at 27∘C is 36.8. How many moles of NO2 will be present in 92 g of the mixture?
Answer» The vapour density of a mixture of $N O_{2}$ and $N_{2} O_{4}$ at $27^{\circ} C$ is 36.8. How many moles of $N O_{2}$ will be present in $92 g$ of the mixture?

Discussion

8.	Alkyl halides can be obtained by all methods except for:
Answer» Alkyl halides can be obtained by all methods except for:

Discussion

9.	For the reaction C2H6(g)+nO2⟶CO2(g)+H2O(l), the ratio of the coefficients of CO2 and H2O is:
Answer» For the reaction $C_{2} H_{6} (g) + n O_{2} ⟶ C O_{2} (g) + H_{2} O (l)$ , the ratio of the coefficients of $C O_{2}$ and $H_{2} O$ is:

Discussion

10.	Steam enters in adiabatic turbine with enthalpy 3000 kJ/kg at a steady flow rate of 8 kg/s. At a point where enthalpy is 2820 kJ/kg, 3 kg/s is extracted. The remaining mass further expands till enthalpy becomes 2200 kJ/kg. The power developed by the turbine is
Answer» Steam enters in adiabatic turbine with enthalpy 3000 kJ/kg at a steady flow rate of 8 kg/s. At a point where enthalpy is $2820 k J / k g$ , $3 k g / s$ is extracted. The remaining mass further expands till enthalpy becomes $2200 k J / k g$ . The power developed by the turbine is

Discussion

11.	5. Which of the following ions will have lowest value of molar conductance in an aqueous solution ? Why ? (1) Na+ (2) K+ (3) Rb+ (4) Cs+
Answer» 5. Which of the following ions will have lowest value of molar conductance in an aqueous solution ? Why ? (1) Na+ (2) K+ (3) Rb+ (4) Cs+

Discussion

12.	K1 and K2 for dissociation of H2S are 4 x 10-3 and 1 x 10-5. Calculate sulphide ion concentration in 0.1 MH2S solution.
Answer» K₁ and K₂ for dissociation of H₂S are 4 x 10^-3 and 1 x 10^-5. Calculate sulphide ion concentration in 0.1 MH₂S solution.

Discussion

13.	Explain kinetic theory
Answer» Explain kinetic theory

Discussion

14.	Calculate weight of hydrogen gas present when 85 gm of Ammonia is heated
Answer» Calculate weight of hydrogen gas present when 85 gm of Ammonia is heated

Discussion

15.	The no of isomers for the compound with molecular formula c2BrClFI
Answer» The no of isomers for the compound with molecular formula c2BrClFI

Discussion

16.	Histidine can be converted into histamine by
Answer» Histidine can be converted into histamine by

Discussion

17.	Ethylene reacts with Br2 to give 1,2−dibromoethane. The anti addition takes place due to the formation of which intermediate?
Answer» Ethylene reacts with $B r_{2}$ to give $1, 2 - dibromoethane$ . The anti addition takes place due to the formation of which intermediate?

Discussion

18.	43. Differentiate between Crystal lattice and unit cell.
Answer» 43. Differentiate between Crystal lattice and unit cell.

Discussion

19.	34.05 ml of phosphorus vapour weighs 0.0625 g at546 degree C and 0.1 bar pressure. What is the molar mass of phosphorus?
Answer» 34.05 ml of phosphorus vapour weighs 0.0625 g at546 degree C and 0.1 bar pressure. What is the molar mass of phosphorus?

Discussion

20.	A new flurocarbon of molar mass 102 g/mol was placed in a electrically heated vessel. When the pressure was 650 torr, the liquid boiled at 57oC. After the boiling point had been reached it was found that a current of 0.25 A from a 12 V supply passed for 600 s vapourises 1.8 g of the sample.(Take R=253 J/molK)
Answer» A new flurocarbon of molar mass $102 g/mol$ was placed in a electrically heated vessel. When the pressure was $650 torr$ , the liquid boiled at $57^{o} C$ . After the boiling point had been reached it was found that a current of $0.25 A$ from a $12 V$ supply passed for $600 s$ vapourises $1.8 g$ of the sample. $(Take R = \frac{25}{3} J/molK$ )

Discussion

21.	35. The E at 25C for the following reaction is 0.55 V. Calculate the δ G in kJ (1)637 (2)424 (3)106 (4)318.5
Answer» 35. The E at 25C for the following reaction is 0.55 V. Calculate the δ G in kJ (1)637 (2)424 (3)106 (4)318.5

Discussion

22.	Total number of optically active isomers of 2,3-dibromobutane will be
Answer» Total number of optically active isomers of 2,3-dibromobutane will be

Discussion

23.	If mercury is used as cathode in the electrolysis of aqueous NaCl solution ,the ion discharged at cathode is?
Answer» If mercury is used as cathode in the electrolysis of aqueous NaCl solution ,the ion discharged at cathode is?

Discussion

24.	Which of the following diene will have the least heat of hydrogenation?
Answer» Which of the following diene will have the least heat of hydrogenation?

Discussion

25.	75 The enthalpy of hydrogenation of cyclohexane is -119.5kJ/mol.if resonance energy of benzene is -150.4 kJ/mol, it's enthalpy of hydrogenation would be
Answer» 75 The enthalpy of hydrogenation of cyclohexane is -119.5kJ/mol.if resonance energy of benzene is -150.4 kJ/mol, it's enthalpy of hydrogenation would be

Discussion

26.	gvern equilibrium?1 (gH, (g) + I (g)A mixture of 1.57 mol of N, 1.92 mol of H, and 8.13 mol of NH, is introduced intoa 20 L reaction vessel at 500 K. At this temperature, the equilibrium constant,K for the reaction N (g) + 3H, (g) 2NH, (g) is 1.7 x 102. Is the reaction mixture2'32at equilibrium? If not, what is the direction of the net reaction?The ea
Answer» gvern equilibrium?1 (gH, (g) + I (g)A mixture of 1.57 mol of N, 1.92 mol of H, and 8.13 mol of NH, is introduced intoa 20 L reaction vessel at 500 K. At this temperature, the equilibrium constant,K for the reaction N (g) + 3H, (g) 2NH, (g) is 1.7 x 102. Is the reaction mixture2'32at equilibrium? If not, what is the direction of the net reaction?The ea

Discussion

27.	Calculate total number of atoms in the following.(1) 5 gm molecule Nitrogen.(2) 2 gm atom hydrogen.
Answer» Calculate total number of atoms in the following.(1) 5 gm molecule Nitrogen.(2) 2 gm atom hydrogen.

Discussion

28.	in acidic medium required number of moles of ferrous oxalate for reduction of 2.5 moles of KMnO4 is
Answer» in acidic medium required number of moles of ferrous oxalate for reduction of 2.5 moles of KMnO4 is

Discussion

29.	A 1 g sample of KClO3 was heated under such conditions that a part of it decomposed according to the equation.(i) 2KClO3→2KCl+3O2And the remaining underwent change according to the equation. (ii) 4KClO3→3KClO4+KClIf the amount of oxygen evolved was 146.8 mL at NTP, calculate the percentage by weight of KClO4 in the residue.
Answer» A 1 g sample of $K C l O_{3}$ was heated under such conditions that a part of it decomposed according to the equation. $(i) 2 K C l O_{3} \to 2 K C l + 3 O_{2}$ And the remaining underwent change according to the equation. $(i i) 4 K C l O_{3} \to 3 K C l O_{4} + K C l$ If the amount of oxygen evolved was 146.8 mL at NTP, calculate the percentage by weight of $K C l O_{4}$ in the residue.

Discussion

30.	Propane is obtained from propene, by which of the following methods
Answer» Propane is obtained from propene, by which of the following methods

Discussion

31.	Explain the nature of the covalent bond using the bond formation in CH3Cl.
Answer» Explain the nature of the covalent bond using the bond formation in $C H_{3} C l$ .

Discussion

32.	A piece of wood was burned and 7.32 g of CO2 was collected. The total radioactivity in CO2 was 7.6 dpm. How old was the wood sample ? Given t12 of C - 14 = 5730 years, specific activity of carbon obtained from a fresh wood sample is 15.2 dpm.
Answer» A piece of wood was burned and 7.32 g of $C O_{2}$ was collected. The total radioactivity in $C O_{2}$ was 7.6 dpm. How old was the wood sample ? Given $t_{\frac{1}{2}}$ of C - 14 = 5730 years, specific activity of carbon obtained from a fresh wood sample is 15.2 dpm.

Discussion

33.	22 gm of CO2 at 27∘C is mixed with 16 gm of O2 at 37∘C. The temperature of the mixture is
Answer» 22 gm of $C O_{2}$ at $27^{\circ} C$ is mixed with 16 gm of $O_{2}$ at $37^{\circ} C$ . The temperature of the mixture is

Discussion

34.	Benzene diazonium chloride forms orange red dye with:
Answer» Benzene diazonium chloride forms orange red dye with:

Discussion

35.	Which one of the following is an α− amino acid ?
Answer» Which one of the following is an $α -$ amino acid ?

Discussion

36.	Which of the following statements is true about element R present in 13th group of the periodic table?
Answer» Which of the following statements is true about element R present in $13^{t h}$ group of the periodic table?

Discussion

37.	12. Derive in fcc 1. nearest tetrahedral void distance. 2.nearest octahedral void distance. 3.nearest tetrahedral and octahedral void distance. 1) -1 2) 0 3) 1 4) None of these
Answer» 12. Derive in fcc 1. nearest tetrahedral void distance. 2.nearest octahedral void distance. 3.nearest tetrahedral and octahedral void distance. 1) -1 2) 0 3) 1 4) None of these

Discussion

38.	If at 298 K the bond energies of C - H, C - C, C - C and H - H bonds are respectively 414, 347, 615 and 435 kJ mol−1, the value of enthalpy change for the reaction H2C = CH2(g) → H3C − CH3(g) at 298K will be
Answer» If at $298 K$ the bond energies of C - H, C - C, C - C and H - H bonds are respectively 414, 347, 615 and 435 $k J m o l^{- 1}$ , the value of enthalpy change for the reaction $H_{2} C = C H_{2} (g) \to H_{3} C - C H_{3} (g)$ at 298K will be

Discussion

39.	Question 33A compound X is formed by the reaction of a carboxylic acid C2H4O2 and an alcohol in presence of a few drops of H2SO4. The alcohol on oxidation with alkaline KMnO4 followed by acidification gives the same carboxylic acid as used in this reaction. Give the names and structures of (a) carboxylic acid, (b) alcohol and (c) the compound X. Also write the reaction.
Answer» Question 33 A compound $X$ is formed by the reaction of a carboxylic acid $C_{2} H_{4} O_{2}$ and an alcohol in presence of a few drops of $H_{2} {SO}_{4}$ . The alcohol on oxidation with alkaline ${KMnO}_{4}$ followed by acidification gives the same carboxylic acid as used in this reaction. Give the names and structures of (a) carboxylic acid, (b) alcohol and (c) the compound $X$ . Also write the reaction.

Discussion

40.	what is the difference between ionisation energy and atomisation energy?
Answer» what is the difference between ionisation energy and atomisation energy?

Discussion

41.	The empirical formula and molecular mass of a compound are CH2O and 180 g respectively. What will be the molecular formula of the compound ? (a) C9H18O9 (b) CH2O (c) C6H12O6 (d) C2H4O2
Answer» The empirical formula and molecular mass of a compound are $C H_{2} O$ and 180 g respectively. What will be the molecular formula of the compound ? (a) $C_{9} H_{18} O_{9}$ (b) $C H_{2} O$ (c) $C_{6} H_{12} O_{6}$ (d) $C_{2} H_{4} O_{2}$

41.

The empirical formula and molecular mass of a compound are CH2O and 180 g respectively. What will be the molecular formula of the compound ? (a) C9H18O9 (b) CH2O (c) C6H12O6 (d) C2H4O2

Answer»

The empirical formula and molecular mass of a compound are $C H_{2} O$ and 180 g respectively. What will be the molecular formula of the compound ?

(a) $C_{9} H_{18} O_{9}$ (b) $C H_{2} O$ (c) $C_{6} H_{12} O_{6}$ (d) $C_{2} H_{4} O_{2}$

Discussion

42.	Why covelent bonded particles form giant structures why not ionic bonded??
Answer» Why covelent bonded particles form giant structures why not ionic bonded??

Discussion

43.	the activation energy for a reaction is 9 kcal/mol.The increase in rate cons†an t when its temperature is increased form 298 K to 308K is?(R=2 cal K^{-1}mol^{-1},10^{0.213}=1.63)
Answer» the activation energy for a reaction is 9 kcal/mol.The increase in rate cons†an t when its temperature is increased form 298 K to 308K is?(R=2 cal K^{-1}mol^{-1},10^{0.213}=1.63)

Discussion

44.	20%(w/v)of NaOH .Density of solution is 1.6g/ml.Calculate molarity and molality
Answer» 20%(w/v)of NaOH .Density of solution is 1.6g/ml.Calculate molarity and molality

Discussion

45.	As per IS 456:2000 for M20 grade concrete and plain bars in tension the design bond stress τbd=1.2 MPa. Furthur, IS 456:2000 permits this design bond stress value to be increased by 60% for HYSD bars. The stress in the HYSD reinforcing steel bars in tension, σs=360 MPa. Find the required development length, Ld, for HYSD bars in terms of the bar diameter, ϕ._______.46.875
Answer» As per IS 456:2000 for M20 grade concrete and plain bars in tension the design bond stress $τ_{b d}$ =1.2 MPa. Furthur, IS 456:2000 permits this design bond stress value to be increased by 60% for HYSD bars. The stress in the HYSD reinforcing steel bars in tension, $σ_{s} = 360$ MPa. Find the required development length, $L_{d}$ , for HYSD bars in terms of the bar diameter, $ϕ .$ _______. 46.875

Discussion

46.	Which of the following halogen exchange reaction will occur in dry acetone?
Answer» Which of the following halogen exchange reaction will occur in dry acetone?

Discussion

47.	Which of the following will yield N2 when heated?
Answer» Which of the following will yield $N_{2}$ when heated?

Discussion

48.	Towards an electrophilic reagent :
Answer» Towards an electrophilic reagent :

Discussion

49.	9. Complete combustion of hydrocarbon P form x moles of H2O and y mol of CO2 .if x=1.5 y , the volume of CO2 produced at stp due to complete combustion of 1 mole hydrocarbon is
Answer» 9. Complete combustion of hydrocarbon P form x moles of H2O and y mol of CO2 .if x=1.5 y , the volume of CO2 produced at stp due to complete combustion of 1 mole hydrocarbon is

Discussion

50.	4.Generally solid has high density than liquid. But we ever seen that ice is float on water?
Answer» 4.Generally solid has high density than liquid. But we ever seen that ice is float on water?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

ll)danelphthalimidesynthesisAccomplish the following conversions NoNitrobenzene to benzoic acid (Goo MNaNoil) Benzene to m-bromophenol(iii) Benzoic acid to aniline

in the dichromate dianion why 6 Cr bond equivalent why not 8 Cr bond equivalen

1g of dibasic acid is completely neutralised with 100 ml of 0.5 N NAOH solution. what is the molar mass of aci

How to find negationof p implies q

The initial pressure of COCl2 is 1000 torr. The total pressure of the system becomes 1500 torr, when the equilibrium COCl2(g)⇌CO(g)+Cl2(g) is attained at constant temperature. The value of kp (in torr) of the reaction is

which of the followung is most acidic? a)o-nitro phenol b)p-nitro pheno

The vapour density of a mixture of NO2 and N2O4 at 27∘C is 36.8. How many moles of NO2 will be present in 92 g of the mixture?

Alkyl halides can be obtained by all methods except for:

For the reaction C2H6(g)+nO2⟶CO2(g)+H2O(l), the ratio of the coefficients of CO2 and H2O is:

Steam enters in adiabatic turbine with enthalpy 3000 kJ/kg at a steady flow rate of 8 kg/s. At a point where enthalpy is 2820 kJ/kg, 3 kg/s is extracted. The remaining mass further expands till enthalpy becomes 2200 kJ/kg. The power developed by the turbine is

5. Which of the following ions will have lowest value of molar conductance in an aqueous solution ? Why ? (1) Na+ (2) K+ (3) Rb+ (4) Cs+

K1 and K2 for dissociation of H2S are 4 x 10-3 and 1 x 10-5. Calculate sulphide ion concentration in 0.1 MH2S solution.

Explain kinetic theory

Calculate weight of hydrogen gas present when 85 gm of Ammonia is heated

The no of isomers for the compound with molecular formula c2BrClFI

Histidine can be converted into histamine by

Ethylene reacts with Br2 to give 1,2−dibromoethane. The anti addition takes place due to the formation of which intermediate?

43. Differentiate between Crystal lattice and unit cell.

34.05 ml of phosphorus vapour weighs 0.0625 g at546 degree C and 0.1 bar pressure. What is the molar mass of phosphorus?

35. The E at 25C for the following reaction is 0.55 V. Calculate the δ G in kJ (1)637 (2)424 (3)106 (4)318.5

Total number of optically active isomers of 2,3-dibromobutane will be

If mercury is used as cathode in the electrolysis of aqueous NaCl solution ,the ion discharged at cathode is?

Which of the following diene will have the least heat of hydrogenation?

75 The enthalpy of hydrogenation of cyclohexane is -119.5kJ/mol.if resonance energy of benzene is -150.4 kJ/mol, it's enthalpy of hydrogenation would be

Calculate total number of atoms in the following.(1) 5 gm molecule Nitrogen.(2) 2 gm atom hydrogen.

in acidic medium required number of moles of ferrous oxalate for reduction of 2.5 moles of KMnO4 is

Propane is obtained from propene, by which of the following methods

Explain the nature of the covalent bond using the bond formation in CH3Cl.

A piece of wood was burned and 7.32 g of CO2 was collected. The total radioactivity in CO2 was 7.6 dpm. How old was the wood sample ? Given t12 of C - 14 = 5730 years, specific activity of carbon obtained from a fresh wood sample is 15.2 dpm.

22 gm of CO2 at 27∘C is mixed with 16 gm of O2 at 37∘C. The temperature of the mixture is

Benzene diazonium chloride forms orange red dye with:

Which one of the following is an α− amino acid ?

Which of the following statements is true about element R present in 13th group of the periodic table?

12. Derive in fcc 1. nearest tetrahedral void distance. 2.nearest octahedral void distance. 3.nearest tetrahedral and octahedral void distance. 1) -1 2) 0 3) 1 4) None of these

If at 298 K the bond energies of C - H, C - C, C - C and H - H bonds are respectively 414, 347, 615 and 435 kJ mol−1, the value of enthalpy change for the reaction H2C = CH2(g) → H3C − CH3(g) at 298K will be

what is the difference between ionisation energy and atomisation energy?

The empirical formula and molecular mass of a compound are CH2O and 180 g respectively. What will be the molecular formula of the compound ? (a) C9H18O9 (b) CH2O (c) C6H12O6 (d) C2H4O2

Why covelent bonded particles form giant structures why not ionic bonded??

the activation energy for a reaction is 9 kcal/mol.The increase in rate cons†an t when its temperature is increased form 298 K to 308K is?(R=2 cal K^{-1}mol^{-1},10^{0.213}=1.63)

20%(w/v)of NaOH .Density of solution is 1.6g/ml.Calculate molarity and molality

Which of the following halogen exchange reaction will occur in dry acetone?

Which of the following will yield N2 when heated?

Towards an electrophilic reagent :

9. Complete combustion of hydrocarbon P form x moles of H2O and y mol of CO2 .if x=1.5 y , the volume of CO2 produced at stp due to complete combustion of 1 mole hydrocarbon is

4.Generally solid has high density than liquid. But we ever seen that ice is float on water?