46295 + Interview Questions in Chemistry

1.	What is the hybridization of P in PCl5(s) ?
Answer» What is the hybridization of P in $P C l_{5} (s)$ ?

Discussion

2.	Among the following mixtures, major interaction is present in a. Benzene and CCl_4 b. Benzene and C_2H_5OH c. CH_3COCH_3 and CH_3CN d. KCl and water EXPLAIN
Answer» Among the following mixtures, major interaction is present in a. Benzene and CCl_4 b. Benzene and C_2H_5OH c. CH_3COCH_3 and CH_3CN d. KCl and water EXPLAIN

Discussion

3.	25.Why during formation of Helmholtz double layer, the colloidal particles don't coagulate due to neutralization of their charges?
Answer» 25.Why during formation of Helmholtz double layer, the colloidal particles don't coagulate due to neutralization of their charges?

Discussion

4.	A 10.0 g sample of a mixture of calcium chloride and sodium chloride is treated with Na2CO3 to precipiate the calcium as calcium carbonate. This CaCO3 is heated to convert all the calcium to CaO and the final mass of CaO is 1.62 g. The % by mass of CaCl2 in the original mixture is
Answer» A $10.0 g$ sample of a mixture of calcium chloride and sodium chloride is treated with $N a_{2} C O_{3}$ to precipiate the calcium as calcium carbonate. This $C a C O_{3}$ is heated to convert all the calcium to $C a O$ and the final mass of $C a O$ is $1.62 g$ . The $%$ by mass of $C a C l_{2}$ in the original mixture is

Discussion

5.	Describethe shapes of BF3and BH4–.Assign the hybridisation of boron in these species.
Answer» Describe the shapes of BF₃ and BH₄^–. Assign the hybridisation of boron in these species.

Discussion

6.	How many grams of 90% pure Na2SO4 can be produced from 250 gram of 95% pure NaCl ?
Answer» How many grams of 90% pure ${N a}_{2} S O_{4}$ can be produced from 250 gram of 95% pure NaCl ?

Discussion

7.	Specify the oxidation numbers of the metals in the followingcoordination entities:(i) [Co(H2O)(CN)(en)2]2+ (ii) [CoBr2(en)2]+(iii) [PtCl4]2− (iv) K3[Fe(CN)6](v) [Cr(NH3)3Cl3]
Answer» Specify the oxidation numbers of the metals in the following coordination entities: (i) [Co(H₂O)(CN)(en)₂]²⁺ (ii) [CoBr₂(en)₂]⁺ (iii) [PtCl₄]²⁻ (iv) K₃[Fe(CN)₆] (v) [Cr(NH₃)₃Cl₃]

7.

Specify the oxidation numbers of the metals in the followingcoordination entities:(i) [Co(H2O)(CN)(en)2]2+ (ii) [CoBr2(en)2]+(iii) [PtCl4]2− (iv) K3[Fe(CN)6](v) [Cr(NH3)3Cl3]

Answer»

Specify the oxidation numbers of the metals in the following
coordination entities:

(i) [Co(H₂O)(CN)(en)₂]²⁺

(ii) [CoBr₂(en)₂]⁺

(iii) [PtCl₄]²⁻

(iv) K₃[Fe(CN)₆]

(v) [Cr(NH₃)₃Cl₃]

Discussion

8.	1. Haemoglobin contain 0.33% of iron by weight. Molecular weight of haemoglobin is approximately 67200. How many iron atoms are present in one molecule of haemoglobin?
Answer» 1. Haemoglobin contain 0.33% of iron by weight. Molecular weight of haemoglobin is approximately 67200. How many iron atoms are present in one molecule of haemoglobin?

Discussion

9.	Oxidation state of S in FeS2?
Answer» Oxidation state of S in FeS2?

Discussion

10.	Value of f Kp for the equilibrium reactionN2O4(g)⇌2NO2(g) at 288 K is 47.9. The KC for this reaction at same temperature is ........(Nearest integer)(R=0.083LbarK−1mol−1)
Answer» Value of f $K_{p}$ for the equilibrium reaction $N_{2} O_{4 (g)} ⇌ 2 N O_{2 (g)}$ at 288 K is 47.9. The $K_{C}$ for this reaction at same temperature is ........(Nearest integer) $(R = 0.083 L b a r K^{- 1} m o l^{- 1})$

Discussion

11.	Ethanol boils at 78.4oC and the enthalpy of vaporisation of ethanol is 42.4 kJ mol−1. Calculate the entropy of vaporisation of ethanol.
Answer» Ethanol boils at ${78.4}^{o} C$ and the enthalpy of vaporisation of ethanol is $42.4 k J m o l^{- 1} .$ Calculate the entropy of vaporisation of ethanol.

Discussion

12.	25 How to balance the equation through half reaction method
Answer» 25 How to balance the equation through half reaction method

Discussion

13.	How boat shape cyclohexane have eclisped form?
Answer» How boat shape cyclohexane have eclisped form?

Discussion

14.	What is degeneracy of orbitals?
Answer» What is degeneracy of orbitals?

Discussion

15.	The correct order of ionic character is:
Answer» The correct order of ionic character is:

Discussion

16.	which pair of compound is expected to show similar color in aqueous solution (a)FeCl2,CuCl2 (b)VOCl2,CuCl
Answer» which pair of compound is expected to show similar color in aqueous solution (a)FeCl2,CuCl2 (b)VOCl2,CuCl

Discussion

17.	What will be the pressure exerted by a mixture of 3.2 g of methane and 4.4 g of carbon dioxide contained in a 9 dm3 flask at 27∘C?(Given : R=8.314 J K−1 mol−1)
Answer» What will be the pressure exerted by a mixture of $3.2 g$ of methane and $4.4 g$ of carbon dioxide contained in a $9 {dm}^{3}$ flask at $27^{\circ} C$ ? (Given : $R = 8.314 {J K}^{- 1} {mol}^{- 1}$ )

Discussion

18.	The successive ionisation enthalpies of a main group element are 940,2080,3090,4140,7030,7870,16000 and 19500 kJ mol−1. The group to which the element belong is
Answer» The successive ionisation enthalpies of a main group element are $940, 2080, 3090, 4140, 7030, 7870, 16000$ and $19500 {kJ mol}^{- 1}$ . The group to which the element belong is

Discussion

19.	what is disinfectants?
Answer» what is disinfectants?

Discussion

20.	ntwhat is the difference between octahedral voids and tetrahedral voidsn
Answer» ntwhat is the difference between octahedral voids and tetrahedral voidsn

Discussion

21.	A certain amount of ideal monoatomic gas undergoes, process given by UV12=C where U is the internal energy of the gas. The molar specific heat of the gas for the process will be (C = constant)
Answer» A certain amount of ideal monoatomic gas undergoes, process given by $U V^{\frac{1}{2}} = C$ where U is the internal energy of the gas. The molar specific heat of the gas for the process will be (C = constant)

Discussion

22.	Calculate the ratio of pH of a solution containing 1 mole of CH_3COONa+ 1 mole of HCl and of other solution containing 1 mole CH_3COONa+ 1mole of acetic acid per litre- (1) 1 : 1 (2) 2 : 1 (3) 1 : 2 (4) 2 : 3
Answer» Calculate the ratio of pH of a solution containing 1 mole of CH_3COONa+ 1 mole of HCl and of other solution containing 1 mole CH_3COONa+ 1mole of acetic acid per litre- (1) 1 : 1 (2) 2 : 1 (3) 1 : 2 (4) 2 : 3

Discussion

23.	why does silicon have a higher melting temperature than phosphorus according to the atomic structure?
Answer» why does silicon have a higher melting temperature than phosphorus according to the atomic structure?

Discussion

24.	1.25 g of bleaching powder when treated with acetic acid and excess of KI, liberated iodine which required 37.5 mL of 0.2 N sodium thiosulphate solution. Calculate the percentage of available chlorine in the sample of bleaching powder.
Answer» $1.25 g$ of bleaching powder when treated with acetic acid and excess of $K I$ , liberated iodine which required $37.5 m L$ of $0.2 N$ sodium thiosulphate solution. Calculate the percentage of available chlorine in the sample of bleaching powder.

Discussion

25.	Velocity of the electron emitted by Li(Φ (work function) = 2.90 eV) of light of frequency 4.77x10¹5 S-1 is absorbed is (1 eV = 1.6 × 10-¹⁹) (a) 3.10 x 106 ms-¹ (b) 6.20 x 108 ms-¹ (c) 2.51×106 ms -¹ (d) 4.86x108 ms -1
Answer» Velocity of the electron emitted by Li(Φ (work function) = 2.90 eV) of light of frequency 4.77x10¹5 S-1 is absorbed is (1 eV = 1.6 × 10-¹⁹) (a) 3.10 x 106 ms-¹ (b) 6.20 x 108 ms-¹ (c) 2.51×106 ms -¹ (d) 4.86x108 ms -1

Discussion

26.	Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80gm/Lit. Volume of acid required to make one litre of 0.1M H2SO4 solution is?
Answer» Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80gm/Lit. Volume of acid required to make one litre of 0.1M H2SO4 solution is?

Discussion

27.	Define the following terms:(a) Electrolysis(b) Electrolyte(c) Non-electrolyte(d) Cation and anion
Answer» Define the following terms: (a) Electrolysis (b) Electrolyte (c) Non-electrolyte (d) Cation and anion

Discussion

28.	22g of CO2 at 27 celsius is mixed in a closed container with 16 gram of O2 at 37 Celsius if both gases are considered as Ideal kinetic theory of gases then the temperature of mixture is 28.5 Celsius 30.5 Celsius 31.5 Celsius 33 Celsius
Answer» 22g of CO2 at 27 celsius is mixed in a closed container with 16 gram of O2 at 37 Celsius if both gases are considered as Ideal kinetic theory of gases then the temperature of mixture is 28.5 Celsius 30.5 Celsius 31.5 Celsius 33 Celsius

Discussion

29.	Bond order and structure of bf4-
Answer» Bond order and structure of bf4-

Discussion

30.	Name the reagents used in the following reactions: (i)CH3−CO−CH3?→CH3−CH3\|C\|OH−CH3 (ii)CH3−COOH?→ClCH2−COOH
Answer» Name the reagents used in the following reactions: $(i) C H_{3} - C O - C H_{3} ? \to C H_{3} - C H_{3} \| C \| O H - C H_{3}$ $(i i) C H_{3} - C O O H ? \to C l C H_{2} - C O O H$

Discussion

31.	28. Is integration of tanx=log\|secx\|
Answer» 28. Is integration of tanx=log\|secx\|

Discussion

32.	5 mole of an ideal gas expand isotherally and irreversibly from a pressure of 10 atm to 1 atm against a contant external pressure of 1 at. Work done at 300 K is:
Answer» 5 mole of an ideal gas expand isotherally and irreversibly from a pressure of 10 atm to 1 atm against a contant external pressure of 1 at. Work done at 300 K is:

Discussion

33.	which of the following is most polar and how ? CCl_4 CHCl_3 CH_3OH CH_3Cl
Answer» which of the following is most polar and how ? CCl_4 CHCl_3 CH_3OH CH_3Cl

Discussion

34.	What is the reaction on the pin C for a beam as shown in the figure below ?
Answer» What is the reaction on the pin C for a beam as shown in the figure below ?

Discussion

35.	Based upon the technique of reverse osmosis, the approximate minimum pressure required to desalinate sea water containing 3.25% (w/v) NaCl at 27∘ C should be:(Given: R=0.082 L atm K−1 mol−1)
Answer» Based upon the technique of reverse osmosis, the approximate minimum pressure required to desalinate sea water containing $3.25 %$ $(w / v) N a C l$ at $27^{\circ} C$ should be: (Given: $R = 0.082 {L atm K}^{- 1} {mol}^{- 1}$ )

Discussion

36.	Which of the following leads to bonding?
Answer» Which of the following leads to bonding?

Discussion

37.	ntWHEN HYDROGEN IN GROUND STATE IS BOMBAEDED WITH ELECTRON THEN WHAT POTENTIAL IS REQUIRED TO ACCELERATE ELECTRON SO THAT FIRST BRACKET LINE IS EMITTEDn
Answer» ntWHEN HYDROGEN IN GROUND STATE IS BOMBAEDED WITH ELECTRON THEN WHAT POTENTIAL IS REQUIRED TO ACCELERATE ELECTRON SO THAT FIRST BRACKET LINE IS EMITTEDn

Discussion

38.	Acetic acid has a pKa of 4.8, ethanol has a pKa of 16.0. What are the major species present, when acetic acid and ethanol are added to water and then the pH is adjusted to 7.0?(a)CH3CO2H & CH3CO2OH (b)CH3CH2O- & CH3CH2OH(c)CH3CO2H & CH3CH2O- (d)CH3CO2- & CH3CH2OH
Answer» Acetic acid has a pKa of 4.8, ethanol has a pKa of 16.0. What are the major species present, when acetic acid and ethanol are added to water and then the pH is adjusted to 7.0? (a)CH3CO2H & CH3CO2OH (b)CH3CH2O- & CH3CH2OH (c)CH3CO2H & CH3CH2O- (d)CH3CO2- & CH3CH2OH

Discussion

39.	What is the formula of green vitriol?
Answer» What is the formula of green vitriol?

Discussion

40.	A β -pleated sheet organization in a polypeptide chain is an example of
Answer» A $β$ -pleated sheet organization in a polypeptide chain is an example of

Discussion

41.	What is parallax angle?
Answer» What is parallax angle?

Discussion

42.	What is the coordination number of the central point in the following case.Remember that these are not actual particles. They are just the centres of the particles called lattice points. So they may not be touching. ___
Answer» What is the coordination number of the central point in the following case.Remember that these are not actual particles. They are just the centres of the particles called lattice points. So they may not be touching. ___

42.

What is the coordination number of the central point in the following case.Remember that these are not actual particles. They are just the centres of the particles called lattice points. So they may not be touching. ___

Answer»

What is the coordination number of the central point in the following case.Remember that these are not actual particles. They are just the centres of the particles called lattice points. So they may not be touching.

___

Discussion

43.	55 what is the main product of reaction of benzene with Na and liquid NH3
Answer» 55 what is the main product of reaction of benzene with Na and liquid NH3

Discussion

44.	Assuming that dry air contain 79%N2 and 21% O2 by volume. Find the density of moist air at 25∘C and 1.0atm when the relative humidity is 60%. The vapour pressure of water at 25∘C is 23.76 mm Hg.
Answer» Assuming that dry air contain $79 % N_{2} a n d 21 % O_{2}$ by volume. Find the density of moist air at $25^{\circ}$ C and 1.0atm when the relative humidity is $60 %$ . The vapour pressure of water at $25^{\circ}$ C is 23.76 mm Hg.

Discussion

45.	If the various terms in the below-given expressions have usual meanings, the van't Hoff factor (i) cannot be calculated by which of the following expression?
Answer» If the various terms in the below-given expressions have usual meanings, the van't Hoff factor $(i)$ cannot be calculated by which of the following expression?

Discussion

46.	Explain cause of H bonding.
Answer» Explain cause of H bonding.

Discussion

47.	The density of 3M solution of NaCI is 1.1755g/ml. The molality of solution is
Answer» The density of 3M solution of NaCI is 1.1755g/ml. The molality of solution is

Discussion

48.	If the energy of the photon is increased by a factor of 4, then its momentum
Answer» If the energy of the photon is increased by a factor of 4, then its momentum

Discussion

49.	The reaction ; 2O3 → 3O2, is assigned the following mechanism. (I) O3⇋O2+O (ii)O3+Oslow⇌2O2 The rate law of the reaction will therefore be
Answer» The reaction ; $2 O_{3}$ → $3 O_{2}$ , is assigned the following mechanism. (I) $O_{3} ⇋ O_{2} + O (i i) O_{3} + O s l o w ⇌ 2 O_{2}$ The rate law of the reaction will therefore be

49.

The reaction ; 2O3 → 3O2, is assigned the following mechanism. (I) O3⇋O2+O (ii)O3+Oslow⇌2O2 The rate law of the reaction will therefore be

Answer»

The reaction ; $2 O_{3}$ → $3 O_{2}$ , is assigned the following mechanism.

(I) $O_{3} ⇋ O_{2} + O (i i) O_{3} + O s l o w ⇌ 2 O_{2}$

The rate law of the reaction will therefore be

Discussion

50.	Volume of water in 1 mole
Answer» Volume of water in 1 mole

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the hybridization of P in PCl5(s) ?

Among the following mixtures, major interaction is present in a. Benzene and CCl_4 b. Benzene and C_2H_5OH c. CH_3COCH_3 and CH_3CN d. KCl and water EXPLAIN

25.Why during formation of Helmholtz double layer, the colloidal particles don't coagulate due to neutralization of their charges?

A 10.0 g sample of a mixture of calcium chloride and sodium chloride is treated with Na2CO3 to precipiate the calcium as calcium carbonate. This CaCO3 is heated to convert all the calcium to CaO and the final mass of CaO is 1.62 g. The % by mass of CaCl2 in the original mixture is

Describethe shapes of BF3and BH4–.Assign the hybridisation of boron in these species.

How many grams of 90% pure Na2SO4 can be produced from 250 gram of 95% pure NaCl ?

Specify the oxidation numbers of the metals in the followingcoordination entities:(i) [Co(H2O)(CN)(en)2]2+ (ii) [CoBr2(en)2]+(iii) [PtCl4]2− (iv) K3[Fe(CN)6](v) [Cr(NH3)3Cl3]

1. Haemoglobin contain 0.33% of iron by weight. Molecular weight of haemoglobin is approximately 67200. How many iron atoms are present in one molecule of haemoglobin?

Oxidation state of S in FeS2?

Value of f Kp for the equilibrium reactionN2O4(g)⇌2NO2(g) at 288 K is 47.9. The KC for this reaction at same temperature is ........(Nearest integer)(R=0.083LbarK−1mol−1)

Ethanol boils at 78.4oC and the enthalpy of vaporisation of ethanol is 42.4 kJ mol−1. Calculate the entropy of vaporisation of ethanol.

25 How to balance the equation through half reaction method

How boat shape cyclohexane have eclisped form?

What is degeneracy of orbitals?

The correct order of ionic character is:

which pair of compound is expected to show similar color in aqueous solution (a)FeCl2,CuCl2 (b)VOCl2,CuCl

What will be the pressure exerted by a mixture of 3.2 g of methane and 4.4 g of carbon dioxide contained in a 9 dm3 flask at 27∘C?(Given : R=8.314 J K−1 mol−1)

The successive ionisation enthalpies of a main group element are 940,2080,3090,4140,7030,7870,16000 and 19500 kJ mol−1. The group to which the element belong is

what is disinfectants?

ntwhat is the difference between octahedral voids and tetrahedral voidsn

A certain amount of ideal monoatomic gas undergoes, process given by UV12=C where U is the internal energy of the gas. The molar specific heat of the gas for the process will be (C = constant)

Calculate the ratio of pH of a solution containing 1 mole of CH_3COONa+ 1 mole of HCl and of other solution containing 1 mole CH_3COONa+ 1mole of acetic acid per litre- (1) 1 : 1 (2) 2 : 1 (3) 1 : 2 (4) 2 : 3

why does silicon have a higher melting temperature than phosphorus according to the atomic structure?

1.25 g of bleaching powder when treated with acetic acid and excess of KI, liberated iodine which required 37.5 mL of 0.2 N sodium thiosulphate solution. Calculate the percentage of available chlorine in the sample of bleaching powder.

Velocity of the electron emitted by Li(Φ (work function) = 2.90 eV) of light of frequency 4.77x10¹5 S-1 is absorbed is (1 eV = 1.6 × 10-¹⁹) (a) 3.10 x 106 ms-¹ (b) 6.20 x 108 ms-¹ (c) 2.51×106 ms -¹ (d) 4.86x108 ms -1

Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80gm/Lit. Volume of acid required to make one litre of 0.1M H2SO4 solution is?

Define the following terms:(a) Electrolysis(b) Electrolyte(c) Non-electrolyte(d) Cation and anion

22g of CO2 at 27 celsius is mixed in a closed container with 16 gram of O2 at 37 Celsius if both gases are considered as Ideal kinetic theory of gases then the temperature of mixture is 28.5 Celsius 30.5 Celsius 31.5 Celsius 33 Celsius

Bond order and structure of bf4-

Name the reagents used in the following reactions: (i)CH3−CO−CH3?→CH3−CH3|C|OH−CH3 (ii)CH3−COOH?→ClCH2−COOH

28. Is integration of tanx=log|secx|

5 mole of an ideal gas expand isotherally and irreversibly from a pressure of 10 atm to 1 atm against a contant external pressure of 1 at. Work done at 300 K is:

which of the following is most polar and how ? CCl_4 CHCl_3 CH_3OH CH_3Cl

What is the reaction on the pin C for a beam as shown in the figure below ?

Based upon the technique of reverse osmosis, the approximate minimum pressure required to desalinate sea water containing 3.25% (w/v) NaCl at 27∘ C should be:(Given: R=0.082 L atm K−1 mol−1)

Which of the following leads to bonding?

ntWHEN HYDROGEN IN GROUND STATE IS BOMBAEDED WITH ELECTRON THEN WHAT POTENTIAL IS REQUIRED TO ACCELERATE ELECTRON SO THAT FIRST BRACKET LINE IS EMITTEDn

Acetic acid has a pKa of 4.8, ethanol has a pKa of 16.0. What are the major species present, when acetic acid and ethanol are added to water and then the pH is adjusted to 7.0?(a)CH3CO2H & CH3CO2OH (b)CH3CH2O- & CH3CH2OH(c)CH3CO2H & CH3CH2O- (d)CH3CO2- & CH3CH2OH

What is the formula of green vitriol?

A β -pleated sheet organization in a polypeptide chain is an example of

What is parallax angle?

What is the coordination number of the central point in the following case.Remember that these are not actual particles. They are just the centres of the particles called lattice points. So they may not be touching. ___

55 what is the main product of reaction of benzene with Na and liquid NH3

Assuming that dry air contain 79%N2 and 21% O2 by volume. Find the density of moist air at 25∘C and 1.0atm when the relative humidity is 60%. The vapour pressure of water at 25∘C is 23.76 mm Hg.

If the various terms in the below-given expressions have usual meanings, the van't Hoff factor (i) cannot be calculated by which of the following expression?

Explain cause of H bonding.

The density of 3M solution of NaCI is 1.1755g/ml. The molality of solution is

If the energy of the photon is increased by a factor of 4, then its momentum

The reaction ; 2O3 → 3O2, is assigned the following mechanism. (I) O3⇋O2+O (ii)O3+Oslow⇌2O2 The rate law of the reaction will therefore be

Volume of water in 1 mole