46295 + Interview Questions in Chemistry

1.	Match List-I with List-II and select the correct answer using the codes given below the lists.
Answer» Match List-I with List-II and select the correct answer using the codes given below the lists.

1.

Match List-I with List-II and select the correct answer using the codes given below the lists.

Answer»

Match List-I with List-II and select the correct answer using the codes given below the lists.

2.	The reagent (X) can be
Answer» The reagent (X) can be

Discussion

3.	Show that(i) (ii)
Answer» Show that (i) (ii)

3.

Show that(i) (ii)

Answer»

Show that

(i)

(ii)

Discussion

4.	Which are free radical reactions I.CH3−CH=CH2+HBrPeroxide−−−−−→CH3−CH2−CH2BrII.CH3−CH=CH2+HBr→CH3−CHBr−CH3III.CH3−CH=CH2+Cl2→ClCH2−CH=CH2IV.CH3−CH3+Cl2→ClCH2−CH3
Answer» Which are free radical reactions $I . C H_{3} - C H = C H_{2} + H B r P e r o x i d e - ---- \to C H_{3} - C H_{2} - C H_{2} B r I I . C H_{3} - C H = C H_{2} + H B r \to C H_{3} - C H B r - C H_{3} I I I . C H_{3} - C H = C H_{2} + C l_{2} \to C l C H_{2} - C H = C H_{2} I V . C H_{3} - C H_{3} + C l_{2} \to C l C H_{2} - C H_{3}$

4.

Which are free radical reactions I.CH3−CH=CH2+HBrPeroxide−−−−−→CH3−CH2−CH2BrII.CH3−CH=CH2+HBr→CH3−CHBr−CH3III.CH3−CH=CH2+Cl2→ClCH2−CH=CH2IV.CH3−CH3+Cl2→ClCH2−CH3

Answer»

Which are free radical reactions

$I . C H_{3} - C H = C H_{2} + H B r P e r o x i d e - ---- \to C H_{3} - C H_{2} - C H_{2} B r I I . C H_{3} - C H = C H_{2} + H B r \to C H_{3} - C H B r - C H_{3} I I I . C H_{3} - C H = C H_{2} + C l_{2} \to C l C H_{2} - C H = C H_{2} I V . C H_{3} - C H_{3} + C l_{2} \to C l C H_{2} - C H_{3}$

Discussion

5.	A sample of ammonium phosphate (NH4)3PO4 contains 3.18 moles of H atoms. The number of moles of O atoms in the sample is:
Answer» A sample of ammonium phosphate $(N H_{4})_{3} P O_{4}$ contains $3.18$ moles of $H$ atoms. The number of moles of $O$ atoms in the sample is:

Discussion

6.	Which of the following are heterocyclic aromatic compounds?
Answer» Which of the following are heterocyclic aromatic compounds?

Discussion

7.	What is the hybridization of N in N(CH3)3 and N(SiH3)3?
Answer» What is the hybridization of $N$ in $N (C H_{3})_{3}$ and $N (S i H_{3})_{3}$ ?

Discussion

8.	How to decide bond angle increasing order
Answer» How to decide bond angle increasing order

Discussion

9.	P is the probability of finding the 1s electron of hydrogen atom in a spherical shell of infinitesimal thickness, dr, at a distance r from the nucleus. The volume of this shell is 4πr2dr. The qualitative sketch of the dependence of P or r is:
Answer» P is the probability of finding the 1s electron of hydrogen atom in a spherical shell of infinitesimal thickness, dr, at a distance r from the nucleus. The volume of this shell is $4 π r^{2}$ dr. The qualitative sketch of the dependence of P or r is:

Discussion

10.	o2 is present in a 1 L flask at the pressure of 7.6 amstrong of Hg calculate no of molecule at 0 degree celcious
Answer» o2 is present in a 1 L flask at the pressure of 7.6 amstrong of Hg calculate no of molecule at 0 degree celcious

Discussion

11.	5. A fcc unit cell ad a metal A has edge length 0.2 nm then the density of unit cell (g/cm3) is (atomic mass of A is 60u and Na= 6×10*23)
Answer» 5. A fcc unit cell ad a metal A has edge length 0.2 nm then the density of unit cell (g/cm3) is (atomic mass of A is 60u and Na= 6×10*23)

Discussion

12.	Discuss the general charcteristic of group 15 elements with reference to their configuration, oxidation state, atomic size, ionization enthalpy and electronegativity.
Answer» Discuss the general charcteristic of group 15 elements with reference to their configuration, oxidation state, atomic size, ionization enthalpy and electronegativity.

Discussion

13.	What will happen to the pressure of a 10 litre sample of a gas at 10 atm, if it is heated from 250 to 300 k and the volume is kept constant?
Answer» What will happen to the pressure of a 10 litre sample of a gas at 10 atm, if it is heated from 250 to 300 k and the volume is kept constant?

Discussion

14.	Show that 0.477777... can be expressed in the form pq, where p and q are integers and q ≠ 0.
Answer» Show that 0.477777... can be expressed in the form $\frac{p}{q}$ , where p and q are integers and q ≠ 0.

Discussion

15.	If the shortest wave - length of a spectral line in Lyman series for He+ is 'x', then what will be the largest wave length of a spectral line in Balmer series of Li2+
Answer» If the shortest wave - length of a spectral line in Lyman series for $H e^{+}$ is 'x', then what will be the largest wave length of a spectral line in Balmer series of $L i^{2 +}$

Discussion

16.	Find the total structural isomers of C5H10
Answer» Find the total structural isomers of $C_{5} H_{10}$

Discussion

17.	24. What will be the product when prop-1-ene reacts with NOCl. .Give detail mechanism.
Answer» 24. What will be the product when prop-1-ene reacts with NOCl. .Give detail mechanism.

Discussion

18.	What is protonephridia?
Answer» What is protonephridia?

Discussion

19.	The IUPAC name of [CO(NH3)(NO2)3]
Answer» The IUPAC name of $[C O (N H_{3}) (N O_{2})_{3}]$

Discussion

20.	Sticking ofone substance at the surface of another is called
Answer» Sticking of one substance at the surface of another is called

Discussion

21.	An electron is allowed to move freely in a closed cubic box of length of side 10 mm. The uncertainity in its velocity will be:
Answer» An electron is allowed to move freely in a closed cubic box of length of side 10 $m m$ . The uncertainity in its velocity will be:

Discussion

22.	Which of the following statements are correct about barbiturates? (a) Hypnotics or sleep producing agents (b) These are tranquilizers (c) Non-narcotic analgesics (d) Pain reducing without disturbing the nervous system
Answer» Which of the following statements are correct about barbiturates? (a) Hypnotics or sleep producing agents (b) These are tranquilizers (c) Non-narcotic analgesics (d) Pain reducing without disturbing the nervous system

22.

Which of the following statements are correct about barbiturates? (a) Hypnotics or sleep producing agents (b) These are tranquilizers (c) Non-narcotic analgesics (d) Pain reducing without disturbing the nervous system

Answer»

Which of the following statements are correct about barbiturates?
(a) Hypnotics or sleep producing agents
(b) These are tranquilizers
(c) Non-narcotic analgesics
(d) Pain reducing without disturbing the nervous system

Discussion

23.	Do snakes eyes are yellow?
Answer» Do snakes eyes are yellow?

Discussion

24.	Why does Pentan-2-one give addition reaction with NaHSO3 while Pentan-3-one does not?
Answer» Why does Pentan-2-one give addition reaction with NaHSO3 while Pentan-3-one does not?

Discussion

25.	The work done in slowly moving an electron of charge e and mass m from A to B along a semicircular path (as shown in the figure) in vertical plane of charge Q is
Answer» The work done in slowly moving an electron of charge e and mass m from A to B along a semicircular path (as shown in the figure) in vertical plane of charge Q is

Discussion

26.	Considering the basic strength of amines in aqueous solutions, which one has the smallest pKb value?
Answer» Considering the basic strength of amines in aqueous solutions, which one has the smallest $p K_{b}$ value?

Discussion

27.	If half life of a first order reaction is 10 min then how much time it takes for 87.5% completion of reactionOptions:10 min20 minShould have chosen 30 min40 min
Answer» If half life of a first order reaction is 10 min then how much time it takes for 87.5% completion of reaction Options: 10 min 20 min Should have chosen 30 min 40 min

Discussion

28.	Is h3o+ a Lewis Base?
Answer» Is h3o+ a Lewis Base?

Discussion

29.	Which of the following(s) represents the correct order?
Answer» Which of the following(s) represents the correct order?

Discussion

30.	What is the Lewis Structure of chromium
Answer» What is the Lewis Structure of chromium

Discussion

31.	Order of resonance energy in Benzene, pyridine ,pyrrole , thiophene, furan. With explanation
Answer» Order of resonance energy in Benzene, pyridine ,pyrrole , thiophene, furan. With explanation

Discussion

32.	Which of the following will give acetophenone as the major product when treated with benzene and AlCl3?
Answer» Which of the following will give acetophenone as the major product when treated with benzene and $A l C l_{3}$ ?

Discussion

33.	Which of the following alkyl halides will undergo SN1 reaction most readily? (a) (CH3)3C−F (b)(CH3)3C−Cl (c) (CH3)3C−Br (d) (CH3)3C−I
Answer» Which of the following alkyl halides will undergo $S_{N} 1$ reaction most readily? (a) $(C H_{3})_{3} C - F$ (b) $(C H_{3})_{3} C - C l$ (c) $(C H_{3})_{3} C - B r$ (d) $(C H_{3})_{3} C - I$

33.

Which of the following alkyl halides will undergo SN1 reaction most readily? (a) (CH3)3C−F (b)(CH3)3C−Cl (c) (CH3)3C−Br (d) (CH3)3C−I

Answer»

Which of the following alkyl halides will undergo $S_{N} 1$ reaction most readily?

(a) $(C H_{3})_{3} C - F$ (b) $(C H_{3})_{3} C - C l$ (c) $(C H_{3})_{3} C - B r$ (d) $(C H_{3})_{3} C - I$

Discussion

34.	Decreasing order of relative nucleophilicity of the following nucleophiles in protic solvent is - ⊖SH,AC⊖O,Ph⊖O,⊖OH,H2O
Answer» Decreasing order of relative nucleophilicity of the following nucleophiles in protic solvent is - $⊖ S H, A C ⊖ O, P h ⊖ O, ⊖ O H, H_{2} O$

Discussion

35.	Major product formed during the reaction between isobutyl bromide and benzene in presence of anhydrous AlCl3 is (Benzne )
Answer» Major product formed during the reaction between isobutyl bromide and benzene in presence of anhydrous $A l C l_{3}$ is (Benzne )

Discussion

36.	According to VBT any covalent bond will be formed by overlapping of valence atomic orbitals of bonded atoms provided atomic orbitals must be half–filled and electrons be in opposite spin.According to type of overlapping covalent bonds can be classified as: (a) σ bond (b) π bond (c) δ bond.The combination of orbital that cannot produce non–bonding molecular orbital is:(internuclear axis is z–axis)
Answer» According to VBT any covalent bond will be formed by overlapping of valence atomic orbitals of bonded atoms provided atomic orbitals must be half–filled and electrons be in opposite spin. According to type of overlapping covalent bonds can be classified as: (a) $σ$ bond (b) $π$ bond (c) $δ$ bond. The combination of orbital that cannot produce non–bonding molecular orbital is: (internuclear axis is z–axis)

Discussion

37.	20. Account for the following . (a) CaCl2 is used to clear snow from roads to hill stations . (b) ethylene glycol is used as antifreeze solution in ratiators of vehicles in cold countries . (c) the freezing point depression of 0.01 m NaCl is nearly twice that of 0.01 m glucose solution
Answer» 20. Account for the following . (a) CaCl2 is used to clear snow from roads to hill stations . (b) ethylene glycol is used as antifreeze solution in ratiators of vehicles in cold countries . (c) the freezing point depression of 0.01 m NaCl is nearly twice that of 0.01 m glucose solution

Discussion

38.	An ester (A) with mol. formula C9H10O2 was treated with an excess of CH3–MgBr followed by hydrolysis and the product so formed was treated with H2SO4 to give an olefin (B). Ozonolysis of (B) gave a ketone with molecular formula C8H8O, which shows the iodoform test.The structure of (A) is:
Answer» An ester (A) with mol. formula $C_{9} H_{10} O_{2}$ was treated with an excess of $C H_{3} - M g B r$ followed by hydrolysis and the product so formed was treated with $H_{2} S O_{4}$ to give an olefin (B). Ozonolysis of (B) gave a ketone with molecular formula $C_{8} H_{8} O,$ which shows the iodoform test. The structure of (A) is:

Discussion

39.	Question 33 In isotonic solutions ........... . (a) solute and solvent both are same (b) osmotic pressure is same (c) solute and solvent may or may not be same (d) solute is always same solvent may be different
Answer» Question 33 In isotonic solutions ........... . (a) solute and solvent both are same (b) osmotic pressure is same (c) solute and solvent may or may not be same (d) solute is always same solvent may be different

Discussion

40.	26 CH3-CH2-CH2-O-CH3 and (CH3)2-CH2-O-CH3 are Chain isomers or position isomers?
Answer» 26 CH3-CH2-CH2-O-CH3 and (CH3)2-CH2-O-CH3 are Chain isomers or position isomers?

Discussion

41.	Mass numbers of the elements A, B, C and D are 30, 60, 90 and 120 respectively. The specific binding energy of them are 5 MeV, 8.5 MeV , 8 MeV and 7 MeV respectively. The in which of the following reactions energy is released (1) D→2B (2) C→ B + A (3) B→2A (a) Only in (1) (b) In (2), (3) (c) In (1) , (3) (d) In (1) , (2) and (3
Answer» Mass numbers of the elements A, B, C and D are 30, 60, 90 and 120 respectively. The specific binding energy of them are 5 MeV, 8.5 MeV , 8 MeV and 7 MeV respectively. The in which of the following reactions energy is released (1) D→2B (2) C→ B + A (3) B→2A (a) Only in (1) (b) In (2), (3) (c) In (1) , (3) (d) In (1) , (2) and (3

Discussion

42.	The distance between an octahedral and tetrahedral void in fcc lattice?
Answer» The distance between an octahedral and tetrahedral void in fcc lattice?

Discussion

43.	7. What are the rules for nomenclature of tri or higher substituted benzene derivatives?
Answer» 7. What are the rules for nomenclature of tri or higher substituted benzene derivatives?

Discussion

44.	6.02\ast10^{20 }molecules of urea are present in 100ml of its solution.Tge concentration of solution is
Answer» 6.02\ast10^{20 }molecules of urea are present in 100ml of its solution.Tge concentration of solution is

Discussion

45.	2 Aluminium chloride in acidified aqueoussolution forms a complex A', in whichhybridisation state of Al is 'B. What are A'and 'B, respectively?(a) \lbrack Al(H20)613, sp^° d(b) \lbrack Al(H2O)43, sp3(c) \lbrack Al(H2O)4\rbrack3, dsp2(d) \lbrack Al(H20)63, d sp
Answer» 2 Aluminium chloride in acidified aqueoussolution forms a complex A', in whichhybridisation state of Al is 'B. What are A'and 'B, respectively?(a) \lbrack Al(H20)613, sp^° d(b) \lbrack Al(H2O)43, sp3(c) \lbrack Al(H2O)4\rbrack3, dsp2(d) \lbrack Al(H20)63, d sp

Discussion

46.	In which of the following octahedral complex of Co(Z = 27) will be magnitude of Δ0 be the highest ?
Answer» In which of the following octahedral complex of $C o$ (Z = 27) will be magnitude of $Δ_{0}$ be the highest ?

Discussion

47.	N2O4 is 25% dissociated at 37∘C and one atmosphere pressure. Calculate the percentage dissociation at 0.1 atmosphere and 37∘C.
Answer» $N_{2} O_{4}$ is 25% dissociated at $37^{\circ}$ C and one atmosphere pressure. Calculate the percentage dissociation at 0.1 atmosphere and $37^{\circ}$ C.

Discussion

48.	Find out the solubility of Mg(OH)2 in 0.1 M NaOH solution.[Given that the solubility product of Mg(OH)2 is 1.8×10−11]
Answer» Find out the solubility of $M g (O H)_{2}$ in $0.1 M N a O H$ solution. [Given that the solubility product of $M g (O H)_{2}$ is $1.8 \times 10^{- 11}$ ]

Discussion

49.	Can liquid convert into solid by applying pressure?
Answer» Can liquid convert into solid by applying pressure?

Discussion

50.	The French physicist Louis de Broglie in 1924 postulated that matter, like radiation, should exhibit a dual behaviour. He proposed the following relationship between the wavelength lambda of a material particle, its linear momentum p and planck constant h.λ=hp=hmvThe de Broglie relation implies that the wavelength of a particle should decrease as its velocity increases. It also implies that for a given velocity heavier particles should have shorter wavelength than lighter particles. The waves associated with particles in motion are called matter waves or de Broglie waves. These waves differ from the electromagnetic waves as they(i) have lower velocities(ii) have no electrical and magnetic fields and(iii) are not emitted by the particle under consideration.The experimental confirmation of the de Broglie’s relation was obtained when Davisson and Germer, in 1927, observed that a beam of electrons is diffracted by a nickel crystal. As diffraction is a characteristic property of waves, hence the beam of electron behaves as a wave, as proposed by de Broglie.If a proton, electron and alpha -particle are moving with the same kinetic energy then the order of their de-Broglie’s wavelength is?
Answer» The French physicist Louis de Broglie in 1924 postulated that matter, like radiation, should exhibit a dual behaviour. He proposed the following relationship between the wavelength lambda of a material particle, its linear momentum p and planck constant h. $λ = \frac{h}{p} = \frac{h}{m v}$ The de Broglie relation implies that the wavelength of a particle should decrease as its velocity increases. It also implies that for a given velocity heavier particles should have shorter wavelength than lighter particles. The waves associated with particles in motion are called matter waves or de Broglie waves. These waves differ from the electromagnetic waves as they $(i)$ have lower velocities $(i i)$ have no electrical and magnetic fields and $(i i i)$ are not emitted by the particle under consideration. The experimental confirmation of the de Broglie’s relation was obtained when Davisson and Germer, in 1927, observed that a beam of electrons is diffracted by a nickel crystal. As diffraction is a characteristic property of waves, hence the beam of electron behaves as a wave, as proposed by de Broglie. If a proton, electron and alpha -particle are moving with the same kinetic energy then the order of their de-Broglie’s wavelength is?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Match List-I with List-II and select the correct answer using the codes given below the lists.

The reagent (X) can be

Show that(i) (ii)

Which are free radical reactions I.CH3−CH=CH2+HBrPeroxide−−−−−→CH3−CH2−CH2BrII.CH3−CH=CH2+HBr→CH3−CHBr−CH3III.CH3−CH=CH2+Cl2→ClCH2−CH=CH2IV.CH3−CH3+Cl2→ClCH2−CH3

A sample of ammonium phosphate (NH4)3PO4 contains 3.18 moles of H atoms. The number of moles of O atoms in the sample is:

Which of the following are heterocyclic aromatic compounds?

What is the hybridization of N in N(CH3)3 and N(SiH3)3?

How to decide bond angle increasing order

P is the probability of finding the 1s electron of hydrogen atom in a spherical shell of infinitesimal thickness, dr, at a distance r from the nucleus. The volume of this shell is 4πr2dr. The qualitative sketch of the dependence of P or r is:

o2 is present in a 1 L flask at the pressure of 7.6 amstrong of Hg calculate no of molecule at 0 degree celcious

5. A fcc unit cell ad a metal A has edge length 0.2 nm then the density of unit cell (g/cm3) is (atomic mass of A is 60u and Na= 6×10*23)

Discuss the general charcteristic of group 15 elements with reference to their configuration, oxidation state, atomic size, ionization enthalpy and electronegativity.

What will happen to the pressure of a 10 litre sample of a gas at 10 atm, if it is heated from 250 to 300 k and the volume is kept constant?

Show that 0.477777... can be expressed in the form pq, where p and q are integers and q ≠ 0.

If the shortest wave - length of a spectral line in Lyman series for He+ is 'x', then what will be the largest wave length of a spectral line in Balmer series of Li2+

Find the total structural isomers of C5H10

24. What will be the product when prop-1-ene reacts with NOCl. .Give detail mechanism.

What is protonephridia?

The IUPAC name of [CO(NH3)(NO2)3]

Sticking ofone substance at the surface of another is called

An electron is allowed to move freely in a closed cubic box of length of side 10 mm. The uncertainity in its velocity will be:

Which of the following statements are correct about barbiturates? (a) Hypnotics or sleep producing agents (b) These are tranquilizers (c) Non-narcotic analgesics (d) Pain reducing without disturbing the nervous system

Do snakes eyes are yellow?

Why does Pentan-2-one give addition reaction with NaHSO3 while Pentan-3-one does not?

The work done in slowly moving an electron of charge e and mass m from A to B along a semicircular path (as shown in the figure) in vertical plane of charge Q is

Considering the basic strength of amines in aqueous solutions, which one has the smallest pKb value?

If half life of a first order reaction is 10 min then how much time it takes for 87.5% completion of reactionOptions:10 min20 minShould have chosen 30 min40 min

Is h3o+ a Lewis Base?

Which of the following(s) represents the correct order?

What is the Lewis Structure of chromium

Order of resonance energy in Benzene, pyridine ,pyrrole , thiophene, furan. With explanation

Which of the following will give acetophenone as the major product when treated with benzene and AlCl3?

Which of the following alkyl halides will undergo SN1 reaction most readily? (a) (CH3)3C−F (b)(CH3)3C−Cl (c) (CH3)3C−Br (d) (CH3)3C−I

Decreasing order of relative nucleophilicity of the following nucleophiles in protic solvent is - ⊖SH,AC⊖O,Ph⊖O,⊖OH,H2O

Major product formed during the reaction between isobutyl bromide and benzene in presence of anhydrous AlCl3 is (Benzne )

20. Account for the following . (a) CaCl2 is used to clear snow from roads to hill stations . (b) ethylene glycol is used as antifreeze solution in ratiators of vehicles in cold countries . (c) the freezing point depression of 0.01 m NaCl is nearly twice that of 0.01 m glucose solution

An ester (A) with mol. formula C9H10O2 was treated with an excess of CH3–MgBr followed by hydrolysis and the product so formed was treated with H2SO4 to give an olefin (B). Ozonolysis of (B) gave a ketone with molecular formula C8H8O, which shows the iodoform test.The structure of (A) is:

Question 33 In isotonic solutions ........... . (a) solute and solvent both are same (b) osmotic pressure is same (c) solute and solvent may or may not be same (d) solute is always same solvent may be different

26 CH3-CH2-CH2-O-CH3 and (CH3)2-CH2-O-CH3 are Chain isomers or position isomers?

The distance between an octahedral and tetrahedral void in fcc lattice?

7. What are the rules for nomenclature of tri or higher substituted benzene derivatives?

6.02\ast10^{20 }molecules of urea are present in 100ml of its solution.Tge concentration of solution is

2 Aluminium chloride in acidified aqueoussolution forms a complex A', in whichhybridisation state of Al is 'B. What are A'and 'B, respectively?(a) \lbrack Al(H20)613, sp^° d(b) \lbrack Al(H2O)43, sp3(c) \lbrack Al(H2O)4\rbrack3, dsp2(d) \lbrack Al(H20)63, d sp

In which of the following octahedral complex of Co(Z = 27) will be magnitude of Δ0 be the highest ?

N2O4 is 25% dissociated at 37∘C and one atmosphere pressure. Calculate the percentage dissociation at 0.1 atmosphere and 37∘C.

Find out the solubility of Mg(OH)2 in 0.1 M NaOH solution.[Given that the solubility product of Mg(OH)2 is 1.8×10−11]

Can liquid convert into solid by applying pressure?