46295 + Interview Questions in Chemistry

1.	Benzyl bromide, on treatment with a nucleophile - triphenylphosphine, is then made to react with n-Butyl lithium - a strong base to give a phosphorus ylid. Which of the following, on treatment with the said ylid - would yield the hydrocarbon:
Answer» Benzyl bromide, on treatment with a nucleophile - triphenylphosphine, is then made to react with n-Butyl lithium - a strong base to give a phosphorus ylid. Which of the following, on treatment with the said ylid - would yield the hydrocarbon:

Discussion

2.	What is the natural Life time of reactant in a first order reaction having half Life time of 69.3 sec.
Answer» What is the natural Life time of reactant in a first order reaction having half Life time of 69.3 sec.

Discussion

3.	In a first order reaction, the concentration of the reactant decreases from 800 mol dm−3 to 50 mol dm−3 in 2×104s. The rate constant of the reaction in (s−1) is(IIT-JEE, 2003)
Answer» In a first order reaction, the concentration of the reactant decreases from 800 mol $d m^{- 3}$ to 50 mol $d m^{- 3}$ in $2 \times 10^{4} s .$ The rate constant of the reaction in $(s^{- 1})$ is (IIT-JEE, 2003)

Discussion

4.	Calculate Molarity of a solution with 3 moles of compound A in 1L of solution.
Answer» Calculate Molarity of a solution with 3 moles of compound A in 1L of solution.

Discussion

5.	Calculate the molarity of 3.3 molal solution of KCl whose density is 1.28 g/mL.
Answer» Calculate the molarity of $3.3 molal$ solution of $K C l$ whose density is $1.28 g/mL$ .

Discussion

6.	How to find deliquescent compounds and which compound is deliquescent:- a) Hg2Cl2 b) HgCl2 c) ZnCl2 d) CdCl2
Answer» How to find deliquescent compounds and which compound is deliquescent:- a) Hg2Cl2 b) HgCl2 c) ZnCl2 d) CdCl2

6.

How to find deliquescent compounds and which compound is deliquescent:- a) Hg2Cl2 b) HgCl2 c) ZnCl2 d) CdCl2

Answer»

How to find deliquescent compounds and which compound is deliquescent:-

a) Hg2Cl2

b) HgCl2

c) ZnCl2

d) CdCl2

Discussion

7.	What is the shape of Fe(CO)5 and which d orbital involved in hybridization?
Answer» What is the shape of Fe(CO)5 and which d orbital involved in hybridization?

Discussion

8.	2H2+O2==2H2O is a slow reaction or moderately slow reaction?
Answer» 2H2+O2==2H2O is a slow reaction or moderately slow reaction?

Discussion

9.	Which among the following group is introduced, when phenol reacts with chloroform in presence of dilute sodium hydroxide?
Answer» Which among the following group is introduced, when phenol reacts with chloroform in presence of dilute sodium hydroxide?

Discussion

10.	what is gous and colombs law?
Answer» what is gous and colombs law?

Discussion

11.	Among the following which is feasible?
Answer» Among the following which is feasible?

Discussion

12.	Paragraph :In metal excess defect, anions all missed from their lattice sites and they are occupied by electrons to maintain electrical neutrality. These sites occupied by electrons are called F-centers. Question: In metal excess defect
Answer» Paragraph :In metal excess defect, anions all missed from their lattice sites and they are occupied by electrons to maintain electrical neutrality. These sites occupied by electrons are called F-centers. Question: In metal excess defect

12.

Paragraph :In metal excess defect, anions all missed from their lattice sites and they are occupied by electrons to maintain electrical neutrality. These sites occupied by electrons are called F-centers. Question: In metal excess defect

Answer»

Paragraph :In metal excess defect, anions all missed from their lattice sites and they are occupied by electrons to maintain electrical neutrality. These sites occupied by electrons are called F-centers.

Question: In metal excess defect

Discussion

13.	The ΔfG∘ for (NH4Cl,s) at 310 K is −x kJ mol−1.Given: ΔfH∘(NH4Cl,s)=−314.5 kJ mol−1;ΔrCP=0S∘N2(g)=192 J K−1 mol−1; S∘H2(g)=130.5 J K−1 mol−1S∘Cl2(g)=223 J K−1mol−1; S∘NH4Cl(s)=99.5 J K−1 mol−1All given data at 300 K. Find the magnitude of x.
Answer» The $Δ_{f} G^{\circ}$ for $(N H_{4} C l, s)$ at $310 K$ is $- x {kJ mol}^{- 1}$ . Given: $Δ_{f} H^{\circ} (N H_{4} C l, s) = - 314.5 {kJ mol}^{- 1}; Δ_{r} C_{P} = 0 S_{N_{2} (g)}^{\circ} = 192 {J K}^{- 1} {mol}^{- 1}; S_{H_{2} (g)}^{\circ} = 130.5 {J K}^{- 1} {mol}^{- 1} S_{C l_{2} (g)}^{\circ} = 223 {J K}^{- 1} {mol}^{- 1}; S_{N H_{4} C l (s)}^{\circ} = 99.5 {J K}^{- 1} {mol}^{- 1}$ All given data at $300 K$ . Find the magnitude of $x$ .

Discussion

14.	Which of the following gives 2, 3-dimethyl but-2-ene?
Answer» Which of the following gives 2, 3-dimethyl but-2-ene?

Discussion

15.	Find angular momentum for P-shell electron.
Answer» Find angular momentum for P-shell electron.

Discussion

16.	Sulphur reacts with chlorine in 1:2 ratio and forms X. Hydrolysis of X gives a sulphur compound Y. What is the structure and hybridisation of anion of Y?
Answer» Sulphur reacts with chlorine in 1:2 ratio and forms X. Hydrolysis of X gives a sulphur compound Y. What is the structure and hybridisation of anion of Y?

Discussion

17.	WHAT IS THE DIFFERENCE BETWEEN α-SO3 AND β- SO3
Answer» WHAT IS THE DIFFERENCE BETWEEN α-SO3 AND β- SO3

Discussion

18.	The product C in the following reaction is CH3CH2Cl NaCN−−−−−→ (A) Ni/H2−−−−−→ (B) Acetic anhydride−−−−−−−−−−−−−→ (C)
Answer» The product $C$ in the following reaction is $C H_{3} C H_{2} C l N a C N - ---- \to (A) N i / H_{2} - ---- \to (B) Acetic anhydride - ------------ \to (C)$

Discussion

19.	Which of the following molecule has highest electron density in the phenyl ring?
Answer» Which of the following molecule has highest electron density in the phenyl ring?

Discussion

20.	Which one of the following configuration represents a noble gas
Answer» Which one of the following configuration represents a noble gas

Discussion

21.	What is the work which could be obtained from an isothermal reversible expansion of 1 mol of Cl2 from 1 dm3 to 50 dm3 at 273 K using ideal gas behaviour(Given log5=0.693)
Answer» What is the work which could be obtained from an isothermal reversible expansion of $1 m o l$ of $C l_{2}$ from 1 $d m^{3}$ to 50 $d m^{3}$ at $273 K$ using ideal gas behaviour (Given $l o g 5 = 0.693$ )

Discussion

22.	Which of the following will undergo SN2 reaction ?
Answer» Which of the following will undergo $S_{N} 2$ reaction ?

Discussion

23.	Law of multiple proportion is not applicable for(1) N₂O₅ and NO₂(2) H₂O and H₂O₂ (3) C₆H₅OH and C₆H₅SH(4) CH₄ and C₆H₆
Answer» Law of multiple proportion is not applicable for (1) N₂O₅ and NO₂ (2) H₂O and H₂O₂ (3) C₆H₅OH and C₆H₅SH (4) CH₄ and C₆H₆

Discussion

24.	In a face centered cubic unit cell, the ratio of number of alternate tetrahedral voids to the lattice points is
Answer» In a face centered cubic unit cell, the ratio of number of alternate tetrahedral voids to the lattice points is

Discussion

25.	Arrange the following in order of their strength : Vander wall force, London forces, Dipole-induced dipole interaction, dipole-dipole interaction, ionic bond, covalent bond, hydrogen bond.Is dipole-induced dipole interaction stronger than hydrogen bonding?
Answer» Arrange the following in order of their strength : Vander wall force, London forces, Dipole-induced dipole interaction, dipole-dipole interaction, ionic bond, covalent bond, hydrogen bond. Is dipole-induced dipole interaction stronger than hydrogen bonding?

Discussion

26.	why in SHE hydrogen loses its electrons ?
Answer» why in SHE hydrogen loses its electrons ?

Discussion

27.	Dream is related to Reality in the same way as Falsehood is related to …..?
Answer» Dream is related to Reality in the same way as Falsehood is related to …..?

Discussion

28.	The hybridization of boron in B2H6 is
Answer» The hybridization of boron in $B_{2} H_{6}$ is

Discussion

29.	Bakelite and melamine are examples of thermoplastics.False
Answer» Bakelite and melamine are examples of thermoplastics. False

Discussion

30.	Formaldehyde gives an additive product with methyl magnesium iodide which on aqueous hydrolysis gives [MP PMT/PET 1988]
Answer» Formaldehyde gives an additive product with methyl magnesium iodide which on aqueous hydrolysis gives [MP PMT/PET 1988]

30.

Formaldehyde gives an additive product with methyl magnesium iodide which on aqueous hydrolysis gives [MP PMT/PET 1988]

Answer»

Formaldehyde gives an additive product with methyl magnesium iodide which on aqueous hydrolysis gives

[MP PMT/PET 1988]

Discussion

31.	Predict the products in the electrolysis of aqueous potassium bromide.
Answer» Predict the products in the electrolysis of aqueous potassium bromide.

Discussion

32.	A student soaked 10 g of raisins in 50 mL of distilled water in two beakers A and B each. She maintained beaker A at 25°C and beaker B at 50°C. After an hour, the percentage of water absorbed will be:(1) the same in both A and B(2) more in A than in B(3) more in B than in A(4) exactly twice in B than in A
Answer» A student soaked 10 g of raisins in 50 mL of distilled water in two beakers A and B each. She maintained beaker A at 25°C and beaker B at 50°C. After an hour, the percentage of water absorbed will be: (1) the same in both A and B (2) more in A than in B (3) more in B than in A (4) exactly twice in B than in A

Discussion

33.	Which of the following is not a greenhouse gas?
Answer» Which of the following is not a greenhouse gas?

Discussion

34.	A vessel contains a non-linear triatomic gas. If 50% of gas dissociate into individual atom, then find new valueof degree of freedom by ignoring the vibrational mode and any further dissociation.(1) 2.15(3) 5.2510.(2) 3.75(4) 6.35
Answer» A vessel contains a non-linear triatomic gas. If 50% of gas dissociate into individual atom, then find new valueof degree of freedom by ignoring the vibrational mode and any further dissociation.(1) 2.15(3) 5.2510.(2) 3.75(4) 6.35

Discussion

35.	Which of the following belongs to the actinoids series of elements?
Answer» Which of the following belongs to the actinoids series of elements?

Discussion

36.	Calculate the number of moles of electrons present in 54.6 g of electrons.(Take NA=6×1023)
Answer» Calculate the number of moles of electrons present in $54.6 g$ of electrons. (Take $N_{A} = 6 \times 10^{23}$ )

Discussion

37.	35. When ethyne reacts with grignard reagent (CH3MgBr) followed by CO2 / hydronium ion and then with HgSO4/H2SO4 and then with Ag2O.What is the final product formed?
Answer» 35. When ethyne reacts with grignard reagent (CH3MgBr) followed by CO2 / hydronium ion and then with HgSO4/H2SO4 and then with Ag2O.What is the final product formed?

Discussion

38.	The cleavage of an aryl-alkyl halide with cold HI gives:
Answer» The cleavage of an aryl-alkyl halide with cold HI gives:

Discussion

39.	which of the following is an oxidising agent1)MN(CO)52)fe(CO)53)MN2(CO)104)fe2(CO)9
Answer» which of the following is an oxidising agent 1)MN(CO)5 2)fe(CO)5 3)MN2(CO)10 4)fe2(CO)9

Discussion

40.	19.Equal moles of water and sodium chloride are present in solution. Hence molality of of sodium chloride solution is
Answer» 19.Equal moles of water and sodium chloride are present in solution. Hence molality of of sodium chloride solution is

Discussion

41.	Name two oxidizing agent that can convert ethanol to ethanoic acid.
Answer» Name two oxidizing agent that can convert ethanol to ethanoic acid.

Discussion

42.	A bulb emits light of λ=4500 oA. The bulb is rated as 150 watt and 8% of the energy is emitted as light. How many photons are emitted by the bulb per second?
Answer» A bulb emits light of $λ = 4500 o A$ . The bulb is rated as 150 watt and 8% of the energy is emitted as light. How many photons are emitted by the bulb per second?

Discussion

43.	Which one of the following can release foul smelling substance on heating with chloroform and ethanolic KOH
Answer» Which one of the following can release foul smelling substance on heating with chloroform and ethanolic KOH

Discussion

44.	Write the uses of acids.
Answer» Write the uses of acids.

Discussion

45.	One litre of gas is at temperature 25^°C and pressure 10 to power minus 6.How many molecules are present in the vessel?
Answer» One litre of gas is at temperature 25^°C and pressure 10 to power minus 6.How many molecules are present in the vessel?

Discussion

46.	Which one of the following pair of compounds illustrates law of multiple proportions?
Answer» Which one of the following pair of compounds illustrates law of multiple proportions?

Discussion

47.	The ratio of the specific charge of a proton to that of an alpha particle is
Answer» The ratio of the specific charge of a proton to that of an alpha particle is

Discussion

48.	acidic character of the halides of group 17
Answer» acidic character of the halides of group 17

Discussion

49.	The molal elevation constant for water is 0.56 K kg mol−1. Calculate the boiling point (in ∘C) of a solution made by dissolving 6 g of urea (NH2CONH2) in 200 g of water.
Answer» The molal elevation constant for water is $0.56 {K kg mol}^{- 1}$ . Calculate the boiling point $(in^{\circ} C)$ of a solution made by dissolving $6 g$ of urea $(N H_{2} C O N H_{2})$ in $200 g$ of water.

Discussion

50.	Which of the following has the lowest electron affinity?
Answer» Which of the following has the lowest electron affinity?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Benzyl bromide, on treatment with a nucleophile - triphenylphosphine, is then made to react with n-Butyl lithium - a strong base to give a phosphorus ylid. Which of the following, on treatment with the said ylid - would yield the hydrocarbon:

What is the natural Life time of reactant in a first order reaction having half Life time of 69.3 sec.

In a first order reaction, the concentration of the reactant decreases from 800 mol dm−3 to 50 mol dm−3 in 2×104s. The rate constant of the reaction in (s−1) is(IIT-JEE, 2003)

Calculate Molarity of a solution with 3 moles of compound A in 1L of solution.

Calculate the molarity of 3.3 molal solution of KCl whose density is 1.28 g/mL.

How to find deliquescent compounds and which compound is deliquescent:- a) Hg2Cl2 b) HgCl2 c) ZnCl2 d) CdCl2

What is the shape of Fe(CO)5 and which d orbital involved in hybridization?

2H2+O2==2H2O is a slow reaction or moderately slow reaction?

Which among the following group is introduced, when phenol reacts with chloroform in presence of dilute sodium hydroxide?

what is gous and colombs law?

Among the following which is feasible?

Paragraph :In metal excess defect, anions all missed from their lattice sites and they are occupied by electrons to maintain electrical neutrality. These sites occupied by electrons are called F-centers. Question: In metal excess defect

The ΔfG∘ for (NH4Cl,s) at 310 K is −x kJ mol−1.Given: ΔfH∘(NH4Cl,s)=−314.5 kJ mol−1;ΔrCP=0S∘N2(g)=192 J K−1 mol−1; S∘H2(g)=130.5 J K−1 mol−1S∘Cl2(g)=223 J K−1mol−1; S∘NH4Cl(s)=99.5 J K−1 mol−1All given data at 300 K. Find the magnitude of x.

Which of the following gives 2, 3-dimethyl but-2-ene?

Find angular momentum for P-shell electron.

Sulphur reacts with chlorine in 1:2 ratio and forms X. Hydrolysis of X gives a sulphur compound Y. What is the structure and hybridisation of anion of Y?

WHAT IS THE DIFFERENCE BETWEEN α-SO3 AND β- SO3

The product C in the following reaction is CH3CH2Cl NaCN−−−−−→ (A) Ni/H2−−−−−→ (B) Acetic anhydride−−−−−−−−−−−−−→ (C)

Which of the following molecule has highest electron density in the phenyl ring?

Which one of the following configuration represents a noble gas

What is the work which could be obtained from an isothermal reversible expansion of 1 mol of Cl2 from 1 dm3 to 50 dm3 at 273 K using ideal gas behaviour(Given log5=0.693)

Which of the following will undergo SN2 reaction ?

Law of multiple proportion is not applicable for(1) N₂O₅ and NO₂(2) H₂O and H₂O₂ (3) C₆H₅OH and C₆H₅SH(4) CH₄ and C₆H₆

In a face centered cubic unit cell, the ratio of number of alternate tetrahedral voids to the lattice points is

Arrange the following in order of their strength : Vander wall force, London forces, Dipole-induced dipole interaction, dipole-dipole interaction, ionic bond, covalent bond, hydrogen bond.Is dipole-induced dipole interaction stronger than hydrogen bonding?

why in SHE hydrogen loses its electrons ?

Dream is related to Reality in the same way as Falsehood is related to …..?

The hybridization of boron in B2H6 is

Bakelite and melamine are examples of thermoplastics.False

Formaldehyde gives an additive product with methyl magnesium iodide which on aqueous hydrolysis gives [MP PMT/PET 1988]

Predict the products in the electrolysis of aqueous potassium bromide.

Which of the following is not a greenhouse gas?

A vessel contains a non-linear triatomic gas. If 50% of gas dissociate into individual atom, then find new valueof degree of freedom by ignoring the vibrational mode and any further dissociation.(1) 2.15(3) 5.2510.(2) 3.75(4) 6.35

Which of the following belongs to the actinoids series of elements?

Calculate the number of moles of electrons present in 54.6 g of electrons.(Take NA=6×1023)

35. When ethyne reacts with grignard reagent (CH3MgBr) followed by CO2 / hydronium ion and then with HgSO4/H2SO4 and then with Ag2O.What is the final product formed?

The cleavage of an aryl-alkyl halide with cold HI gives:

which of the following is an oxidising agent1)MN(CO)52)fe(CO)53)MN2(CO)104)fe2(CO)9

19.Equal moles of water and sodium chloride are present in solution. Hence molality of of sodium chloride solution is

Name two oxidizing agent that can convert ethanol to ethanoic acid.

A bulb emits light of λ=4500 oA. The bulb is rated as 150 watt and 8% of the energy is emitted as light. How many photons are emitted by the bulb per second?

Which one of the following can release foul smelling substance on heating with chloroform and ethanolic KOH

Write the uses of acids.

One litre of gas is at temperature 25^°C and pressure 10 to power minus 6.How many molecules are present in the vessel?

Which one of the following pair of compounds illustrates law of multiple proportions?

The ratio of the specific charge of a proton to that of an alpha particle is

acidic character of the halides of group 17

The molal elevation constant for water is 0.56 K kg mol−1. Calculate the boiling point (in ∘C) of a solution made by dissolving 6 g of urea (NH2CONH2) in 200 g of water.

Which of the following has the lowest electron affinity?