46295 + Interview Questions in Chemistry

1.	The most stable canonical structure of this molecule is:
Answer» The most stable canonical structure of this molecule is:

Discussion

2.	what is the difference between Schottky defect and vacancy defect?
Answer» what is the difference between Schottky defect and vacancy defect?

Discussion

3.	In hydrogen atom the de broglie wavelength of an electron in the second Bohr orbit is 1-105.8pm2-211.6pm3-211.6π pm4-52.9π pm
Answer» In hydrogen atom the de broglie wavelength of an electron in the second Bohr orbit is 1-105.8pm 2-211.6pm 3-211.6π pm 4-52.9π pm

Discussion

4.	State the constituents of Alnico.
Answer» State the constituents of Alnico.

Discussion

5.	Which of the following indicates the correct order of acidic strength of the following acids. I. HCOOH (Ka = 1.8 × 10−4) II. CH3COOH(Ka = 1.8 × 10−5) III : HCN (Ka = 4.8 × 10−10) IV: HS- (Ka = 1 ×10-14)
Answer» Which of the following indicates the correct order of acidic strength of the following acids. I. HCOOH (Ka = 1.8 $\times$ $10^{- 4}$ ) II. $C H_{3} C O O H$ (Ka = 1.8 $\times$ $10^{- 5}$ ) III : HCN (Ka = 4.8 $\times$ $10^{- 10}$ ) IV: HS- (Ka = 1 $\times$ 10-14)

5.

Which of the following indicates the correct order of acidic strength of the following acids. I. HCOOH (Ka = 1.8 × 10−4) II. CH3COOH(Ka = 1.8 × 10−5) III : HCN (Ka = 4.8 × 10−10) IV: HS- (Ka = 1 ×10-14)

Answer»

Which of the following indicates the correct order of acidic strength of the following acids.

I. HCOOH (Ka = 1.8 $\times$ $10^{- 4}$ )

II. $C H_{3} C O O H$ (Ka = 1.8 $\times$ $10^{- 5}$ )

III : HCN (Ka = 4.8 $\times$ $10^{- 10}$ )

IV: HS- (Ka = 1 $\times$ 10-14)

Discussion

6.	[Fe(CN)6]4− and [Fe(H2O)6]2+ are of different colours in dilute solutions. Why?
Answer» [Fe(CN)₆]⁴⁻ and [Fe(H₂O)₆]²⁺ are of different colours in dilute solutions. Why?

Discussion

7.	38.The number of radial nodes in 4s and 3p orbital are respectively 2,0 3,1 2,2 3,2
Answer» 38.The number of radial nodes in 4s and 3p orbital are respectively 2,0 3,1 2,2 3,2

Discussion

8.	O2 and SO2 gases are filled in ratio of 1:3 by moles in a closed container of 3 L at temperature of 27∘C. If the partial pressure of O2 is 0.54 atm, then the concentration of SO2 (in mol L−1) would be (R=0.082 L atm K−1mol−1)
Answer» $O_{2}$ and $S O_{2}$ gases are filled in ratio of $1 : 3$ by moles in a closed container of $3 L$ at temperature of $27^{\circ} C$ . If the partial pressure of $O_{2}$ is $0.54 atm$ , then the concentration of $S O_{2} ({in mol L}^{- 1})$ would be $(R = 0.082 {L atm K}^{- 1} m o l^{- 1})$

Discussion

9.	the molarity of 9.8%(w/w) H_2SO_4 solution is (d=1.02g/cc
Answer» the molarity of 9.8%(w/w) H_2SO_4 solution is (d=1.02g/cc

Discussion

10.	which of the following is more stable carbocation three degreebenzylic or tertiary carbocatio
Answer» which of the following is more stable carbocation three degreebenzylic or tertiary carbocatio

Discussion

11.	Considering the below reaction, X and Y respectively are:
Answer» Considering the below reaction, X and Y respectively are:

Discussion

12.	What is the resonance structures of SO3?
Answer» What is the resonance structures of SO3?

Discussion

13.	Concentration of the Ag^+ ions in a saturated solutionof Ag2C2O4 is 2.2×10^{-4} mol/L. solubility product of Ag2C2O4 is
Answer» Concentration of the Ag^+ ions in a saturated solutionof Ag2C2O4 is 2.2×10^{-4} mol/L. solubility product of Ag2C2O4 is

Discussion

14.	If E1, E2 and E3 represent respectively the kinetic energies of an electron, an alpha particle and a proton, each having same de-Broglie wavelength then?
Answer» If $E_{1}, E_{2} a n d E_{3}$ represent respectively the kinetic energies of an electron, an alpha particle and a proton, each having same de-Broglie wavelength then?

Discussion

15.	The structure of the compound that gives a tribromo derivative with bromine water is:
Answer» The structure of the compound that gives a tribromo derivative with bromine water is:

Discussion

16.	Radiation emitted due to transistion of an electron from n = 2 to n = 1 in Hydrogen atom is made to fall on a metal surface with work function 1.2eV. The maximum velocity of photo electrons emitted is nearly equal to
Answer» Radiation emitted due to transistion of an electron from n = 2 to n = 1 in Hydrogen atom is made to fall on a metal surface with work function 1.2eV. The maximum velocity of photo electrons emitted is nearly equal to

Discussion

17.	29. NiCl2 + NH4OH + dimethylglyoxime ------> A ( complex ) Incorrect statement for complex A is /are 1- Coordination number of metal ion is 4 2- Two five membered and two six membered rings are present 3- Colour of the precipitate is rosy red 4- It is tetrahedral complex
Answer» 29. NiCl2 + NH4OH + dimethylglyoxime ------> A ( complex ) Incorrect statement for complex A is /are 1- Coordination number of metal ion is 4 2- Two five membered and two six membered rings are present 3- Colour of the precipitate is rosy red 4- It is tetrahedral complex

Discussion

18.	mole fraction of ethanol in ethanol water mixture is .25 . hence percentage concentration of ethanol by weight of mixture is
Answer» mole fraction of ethanol in ethanol water mixture is .25 . hence percentage concentration of ethanol by weight of mixture is

Discussion

19.	Find the values of x and y in the expression \| x + y \| + \| x - y \| < 4 .
Answer» Find the values of x and y in the expression \| x + y \| + \| x - y \| < 4 .

Discussion

20.	58.Calculate infinite molar conductivity of oxalic axid,given that Equivalent infinite molar conductivity of Na2C2O4=400 ohm-1cm2eq-1 Infinite molar conductivity of H2SO4=700 ohm-1cm2mol-1 Equivalent infinite molar conductivity of Na2SO4=450ohm-1cm2eq-1
Answer» 58.Calculate infinite molar conductivity of oxalic axid,given that Equivalent infinite molar conductivity of Na2C2O4=400 ohm-1cm2eq-1 Infinite molar conductivity of H2SO4=700 ohm-1cm2mol-1 Equivalent infinite molar conductivity of Na2SO4=450ohm-1cm2eq-1

Discussion

21.	Find out the number of different photons if transition is possible between n=8 to n=6.
Answer» Find out the number of different photons if transition is possible between $n = 8$ to $n = 6$ .

Discussion

22.	Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives [IIT-JEE 1990]
Answer» Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives [IIT-JEE 1990]

22.

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives [IIT-JEE 1990]

Answer»

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives

[IIT-JEE 1990]

Discussion

23.	Differenciation of 1/3√x⁵
Answer» Differenciation of 1/3√x⁵

Discussion

24.	Correct option for an endothermic gaseous reactionA+B3C will beA(1) AH> 0; AS 0(3) AH> 0; AS > O(4) AS 0; AS 0141
Answer» Correct option for an endothermic gaseous reactionA+B3C will beA(1) AH> 0; AS 0(3) AH> 0; AS > O(4) AS 0; AS 0141

Discussion

25.	The above figure represents which type of unit cell?
Answer» The above figure represents which type of unit cell?

25.

The above figure represents which type of unit cell?

Answer»

The above figure represents which type of unit cell?

Discussion

26.	The frequency of the first line in Lyman series in the hydrogen spectrum is ν. What is the frequency of the corresponding line in the spectrum of body ionized Lithium?
Answer» The frequency of the first line in Lyman series in the hydrogen spectrum is $ν .$ What is the frequency of the corresponding line in the spectrum of body ionized Lithium?

Discussion

27.	what is the amount of h2so4 required to react completly with 100L of NH3
Answer» what is the amount of h2so4 required to react completly with 100L of NH3

Discussion

28.	Arrange in the Order of stability of carbanions benzyl carbanion , allyl carbanion, tertiary carbanion, secondary carbanion, primary carbanion, vinyl carbanion
Answer» Arrange in the Order of stability of carbanions benzyl carbanion , allyl carbanion, tertiary carbanion, secondary carbanion, primary carbanion, vinyl carbanion

Discussion

29.	2. If electron affinity of Cl is 348 KJ/mol then how much energy is released to convert 1.0 gm Cl in Cl- (chloride)gas
Answer» 2. If electron affinity of Cl is 348 KJ/mol then how much energy is released to convert 1.0 gm Cl in Cl- (chloride)gas

Discussion

30.	58. A resonance tube is resonated with tuning fork of frequency f knot.If the length of consecutive resonating air column are32 cm and 100cm then end correction is 1)1cm. 2)2cm. 3)0.5cm. 4)0.25cm
Answer» 58. A resonance tube is resonated with tuning fork of frequency f knot.If the length of consecutive resonating air column are32 cm and 100cm then end correction is 1)1cm. 2)2cm. 3)0.5cm. 4)0.25cm

Discussion

31.	31. How to write a balanced chemical equation when phosphorus reacts with chlorine gas to form phosphorus pentachloride?
Answer» 31. How to write a balanced chemical equation when phosphorus reacts with chlorine gas to form phosphorus pentachloride?

Discussion

32.	Do coupling rxn occur if RNO2(if R is aliphatic) is reacted with LiAlH4?
Answer» Do coupling rxn occur if RNO2(if R is aliphatic) is reacted with LiAlH4?

Discussion

33.	The half life of rdioactiv Po is 138.6 days .For 10 lakh Po atoms , the no. of decays in 24 hrs.is\::
Answer» The half life of rdioactiv Po is 138.6 days .For 10 lakh Po atoms , the no. of decays in 24 hrs.is\::

Discussion

34.	The pressure and volume of a monoatomic ideal gas are related as P∝1V2 for a process A → C as shown in the figure. The pressure and volume at A is 3P0 and V0 respectively and the pressure at C is P0. If the molar heat capacity of the ideal gas for the process A→C in Rx Find x. (R gas constant) ___
Answer» The pressure and volume of a monoatomic ideal gas are related as $P \propto \frac{1}{V^{2}}$ for a process A $\to$ C as shown in the figure. The pressure and volume at A is $3 P_{0} a n d V_{0}$ respectively and the pressure at C is $P_{0}$ . If the molar heat capacity of the ideal gas for the process $A \to C i n \frac{R}{x}$ Find x. (R gas constant) ___

Discussion

35.	Q)If white light is used in YDSE then why is the pattern formed in the order of blue to red?
Answer» Q)If white light is used in YDSE then why is the pattern formed in the order of blue to red?

Discussion

36.	Kp= 0.04 atm at 899 K for the equilibrium shown below. What is theequilibrium concentration of C2H6when it is placed in a flask at 4.0 atm pressure and allowed to cometo equilibrium?
Answer» K_p = 0.04 atm at 899 K for the equilibrium shown below. What is the equilibrium concentration of C₂H₆ when it is placed in a flask at 4.0 atm pressure and allowed to come to equilibrium?

36.

Kp= 0.04 atm at 899 K for the equilibrium shown below. What is theequilibrium concentration of C2H6when it is placed in a flask at 4.0 atm pressure and allowed to cometo equilibrium?

Answer»

K_p
= 0.04 atm at 899 K for the equilibrium shown below. What is the
equilibrium concentration of C₂H₆
when it is placed in a flask at 4.0 atm pressure and allowed to come
to equilibrium?

Discussion

37.	vapour pressure of pure a and b are 200 mm hg and 100 mm hg the vapour pressure of solution containing equimolar quantity of a and b will be 1) 150 mm Hg 2) 100 mm Hg 3) 50 mm Hg 4) 200 mm Hg
Answer» vapour pressure of pure a and b are 200 mm hg and 100 mm hg the vapour pressure of solution containing equimolar quantity of a and b will be 1) 150 mm Hg 2) 100 mm Hg 3) 50 mm Hg 4) 200 mm Hg

Discussion

38.	Q 97/200 If N204 dissociates to 60% intoNO2 at 90^° C then vapour density ofequilibrium mixtur is
Answer» Q 97/200 If N204 dissociates to 60% intoNO2 at 90^° C then vapour density ofequilibrium mixtur is

Discussion

39.	In an alpha decay the mass number of an element decreases by___.
Answer» In an alpha decay the mass number of an element decreases by___.

Discussion

40.	N factor
Answer» N factor

Discussion

41.	glycerol reacts with potassium bisulphate to form (a)allyl iodide (b)allyl sulphate (c)acryl aldehyde (d)glycerol trisulphat
Answer» glycerol reacts with potassium bisulphate to form (a)allyl iodide (b)allyl sulphate (c)acryl aldehyde (d)glycerol trisulphat

Discussion

42.	Which one of the following sets of quantum numbers represents an impossible arrangement?
Answer» Which one of the following sets of quantum numbers represents an impossible arrangement?

Discussion

43.	The wave function of hydrogen atom with its electron in the 2p state varies with direction as well as distance from the nucleus. What is the probability of a 2p electron, for which ml=0,existing in xy plane is 0.Why?
Answer» The wave function of hydrogen atom with its electron in the 2p state varies with direction as well as distance from the nucleus. What is the probability of a 2p electron, for which ml=0,existing in xy plane is 0.Why?

Discussion

44.	An compound with O_2 contains 62.12% C and 13.13% H_2 .The vapour density of the compound is 30 .In oxidation the compound gives B which gives salt of an acid C when treated with NaOH and I_2 .The molecular formula of C is C_2H_4O_2 .B gives an oxime compound D which has molecular formula C_3H_7NO .Identify A,B,C,D.
Answer» An compound with O_2 contains 62.12% C and 13.13% H_2 .The vapour density of the compound is 30 .In oxidation the compound gives B which gives salt of an acid C when treated with NaOH and I_2 .The molecular formula of C is C_2H_4O_2 .B gives an oxime compound D which has molecular formula C_3H_7NO .Identify A,B,C,D.

Discussion

45.	Conjugate base of Ca++ is –
Answer» Conjugate base of $C a^{+ +}$ is –

Discussion

46.	Explainwhy(a) Theangle of contact of mercury with glass is obtuse, while that of waterwith glass is acute.(b) Wateron a clean glass surface tends to spread out while mercury on thesame surface tends to form drops. (Put differently, water wets glasswhile mercury does not.)(c) Surfacetension of a liquid is independent of the area of the surface(d) Waterwith detergent dissolved in it should have small angles of contact.(e) Adrop of liquid under no external forces is always spherical in shape
Answer» Explain why (a) The angle of contact of mercury with glass is obtuse, while that of water with glass is acute. (b) Water on a clean glass surface tends to spread out while mercury on the same surface tends to form drops. (Put differently, water wets glass while mercury does not.) (c) Surface tension of a liquid is independent of the area of the surface (d) Water with detergent dissolved in it should have small angles of contact. (e) A drop of liquid under no external forces is always spherical in shape

46.

Explainwhy(a) Theangle of contact of mercury with glass is obtuse, while that of waterwith glass is acute.(b) Wateron a clean glass surface tends to spread out while mercury on thesame surface tends to form drops. (Put differently, water wets glasswhile mercury does not.)(c) Surfacetension of a liquid is independent of the area of the surface(d) Waterwith detergent dissolved in it should have small angles of contact.(e) Adrop of liquid under no external forces is always spherical in shape

Answer»

Explain
why

(a) The
angle of contact of mercury with glass is obtuse, while that of water
with glass is acute.

(b) Water
on a clean glass surface tends to spread out while mercury on the
same surface tends to form drops. (Put differently, water wets glass
while mercury does not.)

(c) Surface
tension of a liquid is independent of the area of the surface

(d) Water
with detergent dissolved in it should have small angles of contact.

(e) A
drop of liquid under no external forces is always spherical in shape

Discussion

47.	The Conversion of an amide by action of NaOH and Br2 to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction. R−O\|\|C−NH2Br2+NaOH−−−−−−−→(or)NaoBr R−NH2+NaBr+Na2CO3
Answer» The Conversion of an amide by action of NaOH and $B r_{2}$ to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction. $R - O \| \| C - N H_{2} B r_{2} + N a O H - ------ \to (o r) N a o B r R - N H_{2} + N a B r + N a_{2} C O_{3}$

47.

The Conversion of an amide by action of NaOH and Br2 to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction. R−O||C−NH2Br2+NaOH−−−−−−−→(or)NaoBr R−NH2+NaBr+Na2CO3

Answer»

The Conversion of an amide by action of NaOH and $B r_{2}$ to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction.

$R - O | | C - N H_{2} B r_{2} + N a O H - ------ \to (o r) N a o B r R - N H_{2} + N a B r + N a_{2} C O_{3}$

Discussion

48.	Octet rule is applicable to which of the following species?
Answer» Octet rule is applicable to which of the following species?

Discussion

49.	23. Amongst the following compounds the one which is most easily sulphonated is: 1. Benzene 2. Nitrobenzene 3. Toluene 4. Chlorobenzene
Answer» 23. Amongst the following compounds the one which is most easily sulphonated is: 1. Benzene 2. Nitrobenzene 3. Toluene 4. Chlorobenzene

Discussion

50.	4.5 g of aluminium (at. mass 27 amu) is deposited at cathode from Al3+ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions in the solution by the same quantity of electric charge will be:
Answer» $4.5 g$ of aluminium (at. mass 27 amu) is deposited at cathode from ${Al}^{3 +}$ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from $H^{+}$ ions in the solution by the same quantity of electric charge will be:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The most stable canonical structure of this molecule is:

what is the difference between Schottky defect and vacancy defect?

In hydrogen atom the de broglie wavelength of an electron in the second Bohr orbit is 1-105.8pm2-211.6pm3-211.6π pm4-52.9π pm

State the constituents of Alnico.

Which of the following indicates the correct order of acidic strength of the following acids. I. HCOOH (Ka = 1.8 × 10−4) II. CH3COOH(Ka = 1.8 × 10−5) III : HCN (Ka = 4.8 × 10−10) IV: HS- (Ka = 1 ×10-14)

[Fe(CN)6]4− and [Fe(H2O)6]2+ are of different colours in dilute solutions. Why?

38.The number of radial nodes in 4s and 3p orbital are respectively 2,0 3,1 2,2 3,2

O2 and SO2 gases are filled in ratio of 1:3 by moles in a closed container of 3 L at temperature of 27∘C. If the partial pressure of O2 is 0.54 atm, then the concentration of SO2 (in mol L−1) would be (R=0.082 L atm K−1mol−1)

the molarity of 9.8%(w/w) H_2SO_4 solution is (d=1.02g/cc

which of the following is more stable carbocation three degreebenzylic or tertiary carbocatio

Considering the below reaction, X and Y respectively are:

What is the resonance structures of SO3?

Concentration of the Ag^+ ions in a saturated solutionof Ag2C2O4 is 2.2×10^{-4} mol/L. solubility product of Ag2C2O4 is

If E1, E2 and E3 represent respectively the kinetic energies of an electron, an alpha particle and a proton, each having same de-Broglie wavelength then?

The structure of the compound that gives a tribromo derivative with bromine water is:

Radiation emitted due to transistion of an electron from n = 2 to n = 1 in Hydrogen atom is made to fall on a metal surface with work function 1.2eV. The maximum velocity of photo electrons emitted is nearly equal to

29. NiCl2 + NH4OH + dimethylglyoxime ------> A ( complex ) Incorrect statement for complex A is /are 1- Coordination number of metal ion is 4 2- Two five membered and two six membered rings are present 3- Colour of the precipitate is rosy red 4- It is tetrahedral complex

mole fraction of ethanol in ethanol water mixture is .25 . hence percentage concentration of ethanol by weight of mixture is

Find the values of x and y in the expression | x + y | + | x - y | < 4 .

58.Calculate infinite molar conductivity of oxalic axid,given that Equivalent infinite molar conductivity of Na2C2O4=400 ohm-1cm2eq-1 Infinite molar conductivity of H2SO4=700 ohm-1cm2mol-1 Equivalent infinite molar conductivity of Na2SO4=450ohm-1cm2eq-1

Find out the number of different photons if transition is possible between n=8 to n=6.

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives [IIT-JEE 1990]

Differenciation of 1/3√x⁵

Correct option for an endothermic gaseous reactionA+B3C will beA(1) AH> 0; AS 0(3) AH&gt; 0; AS &gt; O(4) AS 0; AS 0141

The above figure represents which type of unit cell?

The frequency of the first line in Lyman series in the hydrogen spectrum is ν. What is the frequency of the corresponding line in the spectrum of body ionized Lithium?

what is the amount of h2so4 required to react completly with 100L of NH3

Arrange in the Order of stability of carbanions benzyl carbanion , allyl carbanion, tertiary carbanion, secondary carbanion, primary carbanion, vinyl carbanion

2. If electron affinity of Cl is 348 KJ/mol then how much energy is released to convert 1.0 gm Cl in Cl- (chloride)gas

58. A resonance tube is resonated with tuning fork of frequency f knot.If the length of consecutive resonating air column are32 cm and 100cm then end correction is 1)1cm. 2)2cm. 3)0.5cm. 4)0.25cm

31. How to write a balanced chemical equation when phosphorus reacts with chlorine gas to form phosphorus pentachloride?

Do coupling rxn occur if RNO2(if R is aliphatic) is reacted with LiAlH4?

The half life of rdioactiv Po is 138.6 days .For 10 lakh Po atoms , the no. of decays in 24 hrs.is\::

Q)If white light is used in YDSE then why is the pattern formed in the order of blue to red?

Kp= 0.04 atm at 899 K for the equilibrium shown below. What is theequilibrium concentration of C2H6when it is placed in a flask at 4.0 atm pressure and allowed to cometo equilibrium?

vapour pressure of pure a and b are 200 mm hg and 100 mm hg the vapour pressure of solution containing equimolar quantity of a and b will be 1) 150 mm Hg 2) 100 mm Hg 3) 50 mm Hg 4) 200 mm Hg

Q 97/200 If N204 dissociates to 60% intoNO2 at 90^° C then vapour density ofequilibrium mixtur is

In an alpha decay the mass number of an element decreases by___.

N factor

glycerol reacts with potassium bisulphate to form (a)allyl iodide (b)allyl sulphate (c)acryl aldehyde (d)glycerol trisulphat

Which one of the following sets of quantum numbers represents an impossible arrangement?

The wave function of hydrogen atom with its electron in the 2p state varies with direction as well as distance from the nucleus. What is the probability of a 2p electron, for which ml=0,existing in xy plane is 0.Why?

Conjugate base of Ca++ is –

The Conversion of an amide by action of NaOH and Br2 to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction. R−O||C−NH2Br2+NaOH−−−−−−−→(or)NaoBr R−NH2+NaBr+Na2CO3

Octet rule is applicable to which of the following species?

23. Amongst the following compounds the one which is most easily sulphonated is: 1. Benzene 2. Nitrobenzene 3. Toluene 4. Chlorobenzene

4.5 g of aluminium (at. mass 27 amu) is deposited at cathode from Al3+ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions in the solution by the same quantity of electric charge will be:

Correct option for an endothermic gaseous reactionA+B3C will beA(1) AH> 0; AS 0(3) AH> 0; AS > O(4) AS 0; AS 0141