46295 + Interview Questions in Chemistry

1.	What would be the weight of CO having 6 NA of oxygen atoms?
Answer» What would be the weight of CO having 6 NA of oxygen atoms?

Discussion

2.	For the given compound number of π electrons that take part in conjugation is/are:
Answer» For the given compound number of $π$ electrons that take part in conjugation is/are:

Discussion

3.	2. As per reactivity series , which elements are 1) highly reactive 2) moderately 3) least. In other words , on electrochemical series, upto which element is high reactivity and similarly moderate and least reactivity.
Answer» 2. As per reactivity series , which elements are 1) highly reactive 2) moderately 3) least. In other words , on electrochemical series, upto which element is high reactivity and similarly moderate and least reactivity.

Discussion

4.	Given are the bond enthalpies: ϵN≡N=945 kJ mol−1, ϵH−H=436 kJ mol−1 and ϵ(N−H)=391 kJ mol−1. The enthalpy change of the reaction N2(g)+3H2(g)→2NH3(g) is
Answer» Given are the bond enthalpies: $ϵ_{N \equiv N} = 945 {kJ mol}^{- 1}, ϵ_{H - H} = 436 {kJ mol}^{- 1}$ and $ϵ_{(N - H)} = 391 {kJ mol}^{- 1}$ . The enthalpy change of the reaction $N_{2} (g) + 3 H_{2} (g) \to 2 N H_{3} (g)$ is

Discussion

5.	The correct order of electron affinity among the following species:O, S, Se
Answer» The correct order of electron affinity among the following species: $O, S, S e$

Discussion

6.	Reactions involving organic compounds generally takes place more slowly than those involving inorganic compounds. This is because?
Answer» Reactions involving organic compounds generally takes place more slowly than those involving inorganic compounds. This is because?

Discussion

7.	What is the exact nature of Ca(OH)2 ?
Answer» What is the exact nature of Ca(OH)2 ?

Discussion

8.	The six membered cyclic structure of glucose is called pyranose structure (𝛼- or 𝛽-form), in analogy with Pyran. The correct structure of Pyran is:
Answer» The six membered cyclic structure of glucose is called pyranose structure (𝛼- or 𝛽-form), in analogy with Pyran. The correct structure of Pyran is:

Discussion

9.	40 How to convert But-1-yne to But-2-yne?
Answer» 40 How to convert But-1-yne to But-2-yne?

Discussion

10.	16. Why alkene is more reactive towards electrophillic addition than alkyne?
Answer» 16. Why alkene is more reactive towards electrophillic addition than alkyne?

Discussion

11.	Write down the geometry,hybridisation of: H3BO3 ICl2+ XeO3 XeOF4
Answer» Write down the geometry,hybridisation of: H3BO3 ICl2+ XeO3 XeOF4

Discussion

12.	40. Why is secondary amine more stable in aqueous condition?
Answer» 40. Why is secondary amine more stable in aqueous condition?

Discussion

13.	Propenenitrile (acrylonitrile) is used in the manufacture of synthetic fibres and nitrile rubber. It can be made from propane using the following gas phase reaction :CH2=CH−CH3+NH3+3/2O2→CH2=CH−CN+3H2OCalculate (in kJ) values corresponds to the standard enthalpy change for this reaction? Assume that the combustion of both reactants and products yields CO2,H2O and N2, and that the enthalpy changes of combustion are ΔHΘc[CH2=CH−CH3]=−2058.0kJmol−1,ΔHΘc[NH3]=−382.8kJmol−1,ΔHΘc[CH2=CH−CN]=−1756.4 kJmol−1
Answer» Propenenitrile (acrylonitrile) is used in the manufacture of synthetic fibres and nitrile rubber. It can be made from propane using the following gas phase reaction : $C H_{2} = C H - C H_{3} + N H_{3} + 3 / 2 O_{2} \to C H_{2} = C H - C N + 3 H_{2} O$ Calculate (in kJ) values corresponds to the standard enthalpy change for this reaction? Assume that the combustion of both reactants and products yields $C O_{2}, H_{2} O$ and $N_{2},$ and that the enthalpy changes of combustion are $Δ H_{c}^{Θ} [C H_{2} = C H - C H_{3}] = - 2058.0 k J m o l^{- 1}, Δ H_{c}^{Θ} [N H_{3}] =$ $- 382.8 k J m o l^{- 1}, Δ H_{c}^{Θ} [C H_{2} = C H - C N] = - 1756.4 k J m o l^{- 1}$

Discussion

14.	Crystal field stabilization energy for the complex ion [FeF6]⁴- is:1)-4Dq2)-24Dq3)-16Dq4)-20Dq
Answer» Crystal field stabilization energy for the complex ion [FeF6]⁴- is: 1)-4Dq 2)-24Dq 3)-16Dq 4)-20Dq

Discussion

15.	1.00 g of oxygen combine with 0.126g of hydrogen to form h2o . 1.00g of nitrogen combine with 0.216g of hydrogen to form nh3. predict the weight of oxygen required to combine with 1.00 g of nitrogen to form an oxide.
Answer» 1.00 g of oxygen combine with 0.126g of hydrogen to form h2o . 1.00g of nitrogen combine with 0.216g of hydrogen to form nh3. predict the weight of oxygen required to combine with 1.00 g of nitrogen to form an oxide.

Discussion

16.	Which of the following are not favourable for the basic properties of amines (I)Electron relasing ability of alkyl groups (II) Steric hinderance of alkyl groups (III) Number of arylgroups (IV) More number of hydrogen bonds
Answer» Which of the following are not favourable for the basic properties of amines (I)Electron relasing ability of alkyl groups (II) Steric hinderance of alkyl groups (III) Number of arylgroups (IV) More number of hydrogen bonds

Discussion

17.	Between FCH2COOH and C6H5COOH , which is more acidic
Answer» Between FCH2COOH and C6H5COOH , which is more acidic

Discussion

18.	Select the odd one out — 1)6:18 2)2:2 3)8:32 4)4:12
Answer» Select the odd one out — 1)6:18 2)2:2 3)8:32 4)4:12

Discussion

19.	If 0.228g of silver salt of dibasic acid gave a residue of 0.162g of silver on ignition, then molecular weight of the acid is
Answer» If 0.228g of silver salt of dibasic acid gave a residue of 0.162g of silver on ignition, then molecular weight of the acid is

Discussion

20.	Asample of HI(g)is placed in flask at a pressure of 0.2 atm. At equilibrium thepartial pressure of HI(g)is 0.04 atm. What is Kpforthe given equilibrium?
Answer» A sample of HI_(g) is placed in flask at a pressure of 0.2 atm. At equilibrium the partial pressure of HI_(g) is 0.04 atm. What is K_pfor the given equilibrium?

20.

Asample of HI(g)is placed in flask at a pressure of 0.2 atm. At equilibrium thepartial pressure of HI(g)is 0.04 atm. What is Kpforthe given equilibrium?

Answer»

A
sample of HI_(g)
is placed in flask at a pressure of 0.2 atm. At equilibrium the
partial pressure of HI_(g)
is 0.04 atm. What is K_pfor
the given equilibrium?

Discussion

21.	39 For a reaction P+Q=2R+S. which is incorrect?? 1. Rate of disappearnce of P=Rate of appearance of S 2. Rate of disappearance of Q= 2Rate of appearance of R
Answer» 39 For a reaction P+Q=2R+S. which is incorrect?? 1. Rate of disappearnce of P=Rate of appearance of S 2. Rate of disappearance of Q= 2Rate of appearance of R

Discussion

22.	5 Specific rotation of an optically pure compound [X] is 40.If a reaction the compound [X] is obtained through a series of chemical reactions. If the specific rotation of solution is -20,what would be the percentage of laboratory isomer in the solution?
Answer» 5 Specific rotation of an optically pure compound [X] is 40.If a reaction the compound [X] is obtained through a series of chemical reactions. If the specific rotation of solution is -20,what would be the percentage of laboratory isomer in the solution?

Discussion

23.	why paratoluidine is stronger base than metatoluidine?
Answer» why paratoluidine is stronger base than metatoluidine?

Discussion

24.	What is the anisotropic phosphate
Answer» What is the anisotropic phosphate

Discussion

25.	Specific heat of a metal is 0.1 cal/g and its equivalent weight is 31.8 its exact atomic weight is
Answer» Specific heat of a metal is 0.1 cal/g and its equivalent weight is 31.8 its exact atomic weight is

Discussion

26.	Among the following sets of reactants which one produces anisole?
Answer» Among the following sets of reactants which one produces anisole?

Discussion

27.	For which of the following ΔH is not equal to ΔU
Answer» For which of the following $Δ H$ is not equal to $Δ U$

Discussion

28.	In NaCl how many Schottky pairs per cm3 at room temperature?
Answer» In NaCl how many Schottky pairs per cm3 at room temperature?

Discussion

29.	In the following sequence of reactions:The product (C) is
Answer» In the following sequence of reactions: The product (C) is

29.

In the following sequence of reactions:The product (C) is

Answer»

In the following sequence of reactions:

The product (C) is

Discussion

30.	A stationary hydrogen atom of mass M emits a photon corresponding to the longest wavelength of Balmer series. The recoil velocity of the atom is
Answer» A stationary hydrogen atom of mass $M$ emits a photon corresponding to the longest wavelength of Balmer series. The recoil velocity of the atom is

Discussion

31.	1g of KClO3 was heated under such conditions that a part of it decomposed according to the equation,2KClO3 gives 2KCl+3O2 and the remaining decomposed as 4KClO3 gives 3KClO4+KCl. If the O2 evolved was 146.8ml at STP, calculate the % by weight of KClO4 in the residue.
Answer» 1g of KClO3 was heated under such conditions that a part of it decomposed according to the equation, 2KClO3 gives 2KCl+3O2 and the remaining decomposed as 4KClO3 gives 3KClO4+KCl. If the O2 evolved was 146.8ml at STP, calculate the % by weight of KClO4 in the residue.

Discussion

32.	More than One Answer Typeएक से अधिक उत्तर प्रकार के प्रश्नWhich among the following reactions produce(s) NH3(g) as one of the product?निम्नलिखित में से कौनसी अभिक्रिया/अभिक्रियाओं में एक उत्पाद के रूप में NH3(g) प्राप्त होती है?
Answer» More than One Answer Type एक से अधिक उत्तर प्रकार के प्रश्न Which among the following reactions produce(s) NH₃(g) as one of the product? निम्नलिखित में से कौनसी अभिक्रिया/अभिक्रियाओं में एक उत्पाद के रूप में NH₃(g) प्राप्त होती है?

Discussion

33.	A ball strikes a horizontal floor at angle θ=30^° with normal to the floor. The coefficient of restitution between the ball and the floor is e=1/3. The percentage of its kinetic energy lost in the collision is nearly (1) 25% (2) 50% (3) 33% (4) 66%
Answer» A ball strikes a horizontal floor at angle θ=30^° with normal to the floor. The coefficient of restitution between the ball and the floor is e=1/3. The percentage of its kinetic energy lost in the collision is nearly (1) 25% (2) 50% (3) 33% (4) 66%

Discussion

34.	Which of the following is the structure of D-xylose?
Answer» Which of the following is the structure of D-xylose?

Discussion

35.	An example of a condensation homopolymer is
Answer» An example of a condensation homopolymer is

Discussion

36.	80.Which combination of quantum numbers n,l,m and s for the electron in an atom does not provide a permissible solutions of the wave function? 1.3,2,-2,1/2 2.3,3,1,-1/2 3.3,2,1,1/2 4.3,1,1,-1/2
Answer» 80.Which combination of quantum numbers n,l,m and s for the electron in an atom does not provide a permissible solutions of the wave function? 1.3,2,-2,1/2 2.3,3,1,-1/2 3.3,2,1,1/2 4.3,1,1,-1/2

Discussion

37.	Ques. Trisilyamine(SiH_3)_3N is : (a) trigonal pyramidal and acidic (b) trigonal pyramidal and basic (c) trigonal pyramidal and neutral (d) trigonal planar and weakly basi
Answer» Ques. Trisilyamine(SiH_3)_3N is : (a) trigonal pyramidal and acidic (b) trigonal pyramidal and basic (c) trigonal pyramidal and neutral (d) trigonal planar and weakly basi

Discussion

38.	which of following amines gives alcohol or phenol by reaction with NaNO2 and HCl at 273-278K? A)C6H5CH2NH-CH3 b)(CH3)2-NH c)C6H5CH2-NH2 d)C2H5-NH2
Answer» which of following amines gives alcohol or phenol by reaction with NaNO2 and HCl at 273-278K? A)C6H5CH2NH-CH3 b)(CH3)2-NH c)C6H5CH2-NH2 d)C2H5-NH2

Discussion

39.	10. Oxidation state of each boron in borax And the most unstable hydride of boron family?
Answer» 10. Oxidation state of each boron in borax And the most unstable hydride of boron family?

Discussion

40.	Which of the following is true for a non-ideal solution showing negative deviation from Raoult’s law?
Answer» Which of the following is true for a non-ideal solution showing negative deviation from Raoult’s law?

Discussion

41.	Bond breaking and bond making takes place in a single step in reaction.
Answer» Bond breaking and bond making takes place in a single step in reaction.

Discussion

42.	ntdensity of methanol is 0.8kg/L ,what is volume needed for making 2.5L of its 0.4M SOLutionn
Answer» ntdensity of methanol is 0.8kg/L ,what is volume needed for making 2.5L of its 0.4M SOLutionn

Discussion

43.	what is beiyer velliger oxidaton
Answer» what is beiyer velliger oxidaton

Discussion

44.	If 241.5 g of zinc sulphate (ZnSO4) reacts with 81 g of aluminium to give aluminium sulphate. Calculate the mass of the excess reagent left.3ZnSO4+2Al→Al2(SO4)3+3Zn(take molar mass of Zn as 65 g)
Answer» If 241.5 g of zinc sulphate $(Z n S O_{4})$ reacts with 81 g of aluminium to give aluminium sulphate. Calculate the mass of the excess reagent left. $3 Z n S O_{4} + 2 A l \to A l_{2} (S O_{4})_{3} + 3 Z n$ (take molar mass of $Z n$ as 65 g)

Discussion

45.	which of the following will give E1CB mechanism:a)ch3-ch(f)-ch2-ch3;b)ch3-ch2-ch2-Br; c) (ch3)3c-Br; d)ch=ch-ch2-B
Answer» which of the following will give E1CB mechanism:a)ch3-ch(f)-ch2-ch3;b)ch3-ch2-ch2-Br; c) (ch3)3c-Br; d)ch=ch-ch2-B

Discussion

46.	16.The concentration of a solution of H2 O2 is 6.8% weight by volume then the volume concentration of the solution is 1)22.4 2)11.2 3)20 4)5
Answer» 16.The concentration of a solution of H2 O2 is 6.8% weight by volume then the volume concentration of the solution is 1)22.4 2)11.2 3)20 4)5

Discussion

47.	Define following terms: 1)Planetary electron 2)predominant form 3)terrestrial hydrogen 4)fusion reaction 5)elemental hydrogen 6)disprotium 7)fractional evaporation 8)amalgams 9)hydrolysis 10)electrolysis 11)Uyeno's method 12)partial oxidation 13)atomic torch 14)occluded hydrogen 15)ultrapurification 16)polymeric hydride 17)complex hydride 18)hybridised 19)crystal 20)crystallation 21)crystal lattice 22)lattice 23)anhydrous 24)lather 25)ion-exchange resins 26)calgon 27)permutit 28)nuclear reactor 29)peroxide 30)oxygenated 31)catalyst 32)exposure 33)paraffin wax coated plastic 34)teflon bottle 35)polythene bottle 36)germicide 37)perhydrol 38)molarity 39)affinity 40)ionisation enthalpy 41)atomicity
Answer» Define following terms: 1)Planetary electron 2)predominant form 3)terrestrial hydrogen 4)fusion reaction 5)elemental hydrogen 6)disprotium 7)fractional evaporation 8)amalgams 9)hydrolysis 10)electrolysis 11)Uyeno's method 12)partial oxidation 13)atomic torch 14)occluded hydrogen 15)ultrapurification 16)polymeric hydride 17)complex hydride 18)hybridised 19)crystal 20)crystallation 21)crystal lattice 22)lattice 23)anhydrous 24)lather 25)ion-exchange resins 26)calgon 27)permutit 28)nuclear reactor 29)peroxide 30)oxygenated 31)catalyst 32)exposure 33)paraffin wax coated plastic 34)teflon bottle 35)polythene bottle 36)germicide 37)perhydrol 38)molarity 39)affinity 40)ionisation enthalpy 41)atomicity

Discussion

48.	The stability of +4 oxidation state will be maximum in:
Answer» The stability of +4 oxidation state will be maximum in:

Discussion

49.	For two ionic solids CaO and KI identify the wrong statementCaO has high melting point Lattice energy of CaO is much higher than that of KIKI has high melting point KI is soluble in benzene
Answer» For two ionic solids CaO and KI identify the wrong statement CaO has high melting point Lattice energy of CaO is much higher than that of KI KI has high melting point KI is soluble in benzene

Discussion

50.	Acrylic acid react with HBr to give:
Answer» Acrylic acid react with $H B r$ to give:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What would be the weight of CO having 6 NA of oxygen atoms?

For the given compound number of π electrons that take part in conjugation is/are:

2. As per reactivity series , which elements are 1) highly reactive 2) moderately 3) least. In other words , on electrochemical series, upto which element is high reactivity and similarly moderate and least reactivity.

Given are the bond enthalpies: ϵN≡N=945 kJ mol−1, ϵH−H=436 kJ mol−1 and ϵ(N−H)=391 kJ mol−1. The enthalpy change of the reaction N2(g)+3H2(g)→2NH3(g) is

The correct order of electron affinity among the following species:O, S, Se

Reactions involving organic compounds generally takes place more slowly than those involving inorganic compounds. This is because?

What is the exact nature of Ca(OH)2 ?

The six membered cyclic structure of glucose is called pyranose structure ​(𝛼- or 𝛽-form), in analogy with Pyran. The correct structure of Pyran is:

40 How to convert But-1-yne to But-2-yne?

16. Why alkene is more reactive towards electrophillic addition than alkyne?

Write down the geometry,hybridisation of: H3BO3 ICl2+ XeO3 XeOF4

40. Why is secondary amine more stable in aqueous condition?

Crystal field stabilization energy for the complex ion [FeF6]⁴- is:1)-4Dq2)-24Dq3)-16Dq4)-20Dq

1.00 g of oxygen combine with 0.126g of hydrogen to form h2o . 1.00g of nitrogen combine with 0.216g of hydrogen to form nh3. predict the weight of oxygen required to combine with 1.00 g of nitrogen to form an oxide.

Which of the following are not favourable for the basic properties of amines (I)Electron relasing ability of alkyl groups (II) Steric hinderance of alkyl groups (III) Number of arylgroups (IV) More number of hydrogen bonds

Between FCH2COOH and C6H5COOH , which is more acidic

Select the odd one out — 1)6:18 2)2:2 3)8:32 4)4:12

If 0.228g of silver salt of dibasic acid gave a residue of 0.162g of silver on ignition, then molecular weight of the acid is

Asample of HI(g)is placed in flask at a pressure of 0.2 atm. At equilibrium thepartial pressure of HI(g)is 0.04 atm. What is Kpforthe given equilibrium?

39 For a reaction P+Q=2R+S. which is incorrect?? 1. Rate of disappearnce of P=Rate of appearance of S 2. Rate of disappearance of Q= 2Rate of appearance of R

5 Specific rotation of an optically pure compound [X] is 40.If a reaction the compound [X] is obtained through a series of chemical reactions. If the specific rotation of solution is -20,what would be the percentage of laboratory isomer in the solution?

why paratoluidine is stronger base than metatoluidine?

What is the anisotropic phosphate

Specific heat of a metal is 0.1 cal/g and its equivalent weight is 31.8 its exact atomic weight is

Among the following sets of reactants which one produces anisole?

For which of the following ΔH is not equal to ΔU

In NaCl how many Schottky pairs per cm3 at room temperature?

In the following sequence of reactions:The product (C) is

A stationary hydrogen atom of mass M emits a photon corresponding to the longest wavelength of Balmer series. The recoil velocity of the atom is

1g of KClO3 was heated under such conditions that a part of it decomposed according to the equation,2KClO3 gives 2KCl+3O2 and the remaining decomposed as 4KClO3 gives 3KClO4+KCl. If the O2 evolved was 146.8ml at STP, calculate the % by weight of KClO4 in the residue.

A ball strikes a horizontal floor at angle θ=30^° with normal to the floor. The coefficient of restitution between the ball and the floor is e=1/3. The percentage of its kinetic energy lost in the collision is nearly (1) 25% (2) 50% (3) 33% (4) 66%

Which of the following is the structure of D-xylose?

An example of a condensation homopolymer is

80.Which combination of quantum numbers n,l,m and s for the electron in an atom does not provide a permissible solutions of the wave function? 1.3,2,-2,1/2 2.3,3,1,-1/2 3.3,2,1,1/2 4.3,1,1,-1/2

Ques. Trisilyamine(SiH_3)_3N is : (a) trigonal pyramidal and acidic (b) trigonal pyramidal and basic (c) trigonal pyramidal and neutral (d) trigonal planar and weakly basi

which of following amines gives alcohol or phenol by reaction with NaNO2 and HCl at 273-278K? A)C6H5CH2NH-CH3 b)(CH3)2-NH c)C6H5CH2-NH2 d)C2H5-NH2 ​

10. Oxidation state of each boron in borax And the most unstable hydride of boron family?

Which of the following is true for a non-ideal solution showing negative deviation from Raoult’s law?

Bond breaking and bond making takes place in a single step in reaction.

ntdensity of methanol is 0.8kg/L ,what is volume needed for making 2.5L of its 0.4M SOLutionn

what is beiyer velliger oxidaton

If 241.5 g of zinc sulphate (ZnSO4) reacts with 81 g of aluminium to give aluminium sulphate. Calculate the mass of the excess reagent left.3ZnSO4+2Al→Al2(SO4)3+3Zn(take molar mass of Zn as 65 g)

which of the following will give E1CB mechanism:a)ch3-ch(f)-ch2-ch3;b)ch3-ch2-ch2-Br; c) (ch3)3c-Br; d)ch=ch-ch2-B

16.The concentration of a solution of H2 O2 is 6.8% weight by volume then the volume concentration of the solution is 1)22.4 2)11.2 3)20 4)5

The stability of +4 oxidation state will be maximum in:

For two ionic solids CaO and KI identify the wrong statementCaO has high melting point Lattice energy of CaO is much higher than that of KIKI has high melting point KI is soluble in benzene

Acrylic acid react with HBr to give:

The six membered cyclic structure of glucose is called pyranose structure (𝛼- or 𝛽-form), in analogy with Pyran. The correct structure of Pyran is:

which of following amines gives alcohol or phenol by reaction with NaNO2 and HCl at 273-278K? A)C6H5CH2NH-CH3 b)(CH3)2-NH c)C6H5CH2-NH2 d)C2H5-NH2