46295 + Interview Questions in Chemistry

1.	32. Why hydrolysis of R-X by water is slower when Ag2O is suspended in water
Answer» 32. Why hydrolysis of R-X by water is slower when Ag2O is suspended in water

Discussion

2.	Calculate the number of molecules of sulphur (S8) present in 16 g of solid sulphur.(Given, Atomic mass of sulphur =32 u and NA=6.022×1023)
Answer» Calculate the number of molecules of sulphur $(S_{8})$ present in $16 g$ of solid sulphur. (Given, Atomic mass of sulphur $= 32 u$ and $N_{A} = 6.022 \times 10^{23}$ )

Discussion

3.	Why are BeSO4 and MgSO4 readily solubel in water whle CaSO4,SrSO4 are insoluble?
Answer» Why are $B e S O_{4} a n d M g S O_{4}$ readily solubel in water whle $C a S O_{4}, S r S O_{4}$ are insoluble?

Discussion

4.	The type of isomerism shown by [Co(en)2(NCS)2]Br and [Co(en)2(Br)2]NCS is
Answer» The type of isomerism shown by $[C o (e n)_{2} (N C S)_{2}] B r$ and $[C o (e n)_{2} (B r)_{2}] N C S$ is

Discussion

5.	Howare xenon fluorides XeF2,XeF4and XeF6obtained?
Answer» How are xenon fluorides XeF₂, XeF₄ and XeF₆ obtained?

Discussion

6.	difference between gravitational potential and gravitational potential energy. (in short)
Answer» difference between gravitational potential and gravitational potential energy. (in short)

Discussion

7.	The correct order of polarizability is I−,Br−,Cl−,F−
Answer» The correct order of polarizability is $I^{-}, B r^{-}, C l^{-}, F^{-}$

Discussion

8.	21 In the preparation of alkane by the reduction of alcohol, aldehyde and acid derivatives, how to find the n.o of moles of HI used during reduction?
Answer» 21 In the preparation of alkane by the reduction of alcohol, aldehyde and acid derivatives, how to find the n.o of moles of HI used during reduction?

Discussion

9.	What are functional equations
Answer» What are functional equations

Discussion

10.	26.A certain aqueous solution of FeCl3 has density of 1.1g/ml and contains 20℅ FeCl3.Molar concentration of this solution
Answer» 26.A certain aqueous solution of FeCl3 has density of 1.1g/ml and contains 20℅ FeCl3.Molar concentration of this solution

Discussion

11.	atmost how many isomer can bromohexane have ?
Answer» atmost how many isomer can bromohexane have ?

Discussion

12.	why p-toluidine is more basic than aniline
Answer» why p-toluidine is more basic than aniline

Discussion

13.	3 5 ml of H2O2 (aq) solution liberates 0.508 g of I2 from acidified KI solution. Calculate the volume strength of the H2O2 to solution.
Answer» 3 5 ml of H2O2 (aq) solution liberates 0.508 g of I2 from acidified KI solution. Calculate the volume strength of the H2O2 to solution.

Discussion

14.	p-Dichlorobenzenehas higher m.p. and lower solubility than those of o-and m-isomers.Discuss.
Answer» p-Dichlorobenzene has higher m.p. and lower solubility than those of o- and m-isomers. Discuss.

14.

p-Dichlorobenzenehas higher m.p. and lower solubility than those of o-and m-isomers.Discuss.

Answer»

p-Dichlorobenzene
has higher m.p. and lower solubility than those of o-
and

m-isomers.
Discuss.

Discussion

15.	53. Which of the following IUPAC name is correct A) 1-Chloro-2,3-epoxypropane B) 3-chloro-1,2-epoxypropane
Answer» 53. Which of the following IUPAC name is correct A) 1-Chloro-2,3-epoxypropane B) 3-chloro-1,2-epoxypropane

Discussion

16.	no of pi electrons in anthracene is 14why it is not 18 as antrhacene is fusion of 3 benzene rings
Answer» no of pi electrons in anthracene is 14 why it is not 18 as antrhacene is fusion of 3 benzene rings

Discussion

17.	The total number of protons present in 124 g of NO−3 are:
Answer» The total number of protons present in 124 g of $N O_{3}^{-}$ are:

Discussion

18.	The number of ions present in K3[Fe(CN)6] are
Answer» The number of ions present in $K_{3} [F e (C N)_{6}]$ are

Discussion

19.	Why Pbcl2 reacts with with cl2 to give Pbcl4
Answer» Why Pbcl2 reacts with with cl2 to give Pbcl4

Discussion

20.	Under which different conditions alpha.D. glucose and beta.d.glucose form?
Answer» Under which different conditions alpha.D. glucose and beta.d.glucose form?

Discussion

21.	Is it always necessary to balance an equation
Answer» Is it always necessary to balance an equation

Discussion

22.	The oxidation number of nitrogen atoms in NH4NO3 are:
Answer» The oxidation number of nitrogen atoms in $N H_{4} N O_{3}$ are:

Discussion

23.	what is substitution reaction
Answer» what is substitution reaction

Discussion

24.	Butane-2-ol is[CPMT 1977, 89]
Answer» Butane-2-ol is[CPMT 1977, 89]

Discussion

25.	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

26.	what are continuous and discrete molecular species ?
Answer» what are continuous and discrete molecular species ?

Discussion

27.	A solution of weak acid HA was titrated with base NaOH. The equivalent point was reached when 40 mL of 0.1 M NaOH has been added. Now 20 mL of 0.1 M HCl were added to titraded solution, the pH was found to be 5.0. What will be the pH of the solution obtained by mixing 20 mL of 0.2 M NaOH and 20mL of 0.2 M HA?
Answer» A solution of weak acid $H A$ was titrated with base $N a O H$ . The equivalent point was reached when $40 m L$ of $0.1 M N a O H$ has been added. Now $20 m L$ of $0.1 M H C l$ were added to titraded solution, the $p H$ was found to be $5.0$ . What will be the $p H$ of the solution obtained by mixing $20 m L$ of $0.2 M N a O H$ and $20 m L$ of $0.2 M H A$ ?

Discussion

28.	The second ionization potential of an element M is the energy required to
Answer» The second ionization potential of an element M is the energy required to

28.

The second ionization potential of an element M is the energy required to

Answer»

The second ionization potential of an element M is the energy required to

Discussion

29.	What will be the product by reaction ofmethyl amine with nitrous acid? is it ether or alcoho
Answer» What will be the product by reaction ofmethyl amine with nitrous acid? is it ether or alcoho

Discussion

30.	A certain diatomic molecule, AB has dipole moment 1.6D and the internuclear distance is 100pm. The percentage of electronic charge existing on more electronegative atom is 1. 33% 2. 25% 3. 50% 4. 10%
Answer» A certain diatomic molecule, AB has dipole moment 1.6D and the internuclear distance is 100pm. The percentage of electronic charge existing on more electronegative atom is 1. 33% 2. 25% 3. 50% 4. 10%

Discussion

31.	Which one of the following pair of species have the same bond order?
Answer» Which one of the following pair of species have the same bond order?

Discussion

32.	If the compressibility factor of H2 is 1.8, then the volume of one mole of real H2 at STP will be:
Answer» If the compressibility factor of $H_{2}$ is $1.8$ , then the volume of one mole of real $H_{2}$ at STP will be:

Discussion

33.	What is hydrogen bonding? When does it takes place?
Answer» What is hydrogen bonding? When does it takes place?

Discussion

34.	Outline the principles of refining of metals by the following methods : (i) Zone refining (ii) Vapour phase refining
Answer» Outline the principles of refining of metals by the following methods : (i) Zone refining (ii) Vapour phase refining

Discussion

35.	An orbital has only positive values of wave function at all distances from the nucleus. Find the value of (n+l) for this orbital.
Answer» An orbital has only positive values of wave function at all distances from the nucleus. Find the value of $(n + l)$ for this orbital.

Discussion

36.	For preparing a buffer of pH 6 by mixing sodium acetate and acetic acid the ratio of the concentration of salt and acid should be( Ka=10^-5)
Answer» For preparing a buffer of pH 6 by mixing sodium acetate and acetic acid the ratio of the concentration of salt and acid should be ( Ka=10^-5)

Discussion

37.	The vander waal's equation of corresponding states for 1 mole of gas is [where Pc= critical pressure, Tc= critical temperature, Vc= critical volume] [π=PPc,ϕ=VVcand θ=TTc]
Answer» The vander waal's equation of corresponding states for 1 mole of gas is [where $P_{c} =$ critical pressure, $T_{c} =$ critical temperature, $V_{c} =$ critical volume] $[π = \frac{P}{P_{c}}, ϕ = \frac{V}{V_{c}} a n d θ = \frac{T}{T_{c}}]$

Discussion

38.	Calculate the weight of oxygen produced from thermal decomposition of 5 gram of potassium chlorate
Answer» Calculate the weight of oxygen produced from thermal decomposition of 5 gram of potassium chlorate

Discussion

39.	The elevation in the boiling point of one molar aqueous solution of glucose is: (density = 1.2 g/mL)
Answer» The elevation in the boiling point of one molar aqueous solution of glucose is: (density = 1.2 g/mL)

Discussion

40.	why is tarataric acid optically active instead of having plane of symmetry??
Answer» why is tarataric acid optically active instead of having plane of symmetry??

Discussion

41.	Which Vitamin is responsible for absorbing calcium and phosphorous?
Answer» Which Vitamin is responsible for absorbing calcium and phosphorous?

Discussion

42.	meaning of turgor
Answer» meaning of turgor

Discussion

43.	59 two solutions,(A) containing 0.1 M FeCl3(aq) and( B )containing 0.01M K4[Fe(CN)6] are separated by semipermeable membrane as shown below . If FeCl3 on reaction with K4[Fe(CN)6] producing blue colour of Fe4[Fe(CN)6] then blue colour will be noticed in 1)A 2)B 3)In both A and B 4)neither in A nor in B
Answer» 59 two solutions,(A) containing 0.1 M FeCl3(aq) and( B )containing 0.01M K4[Fe(CN)6] are separated by semipermeable membrane as shown below . If FeCl3 on reaction with K4[Fe(CN)6] producing blue colour of Fe4[Fe(CN)6] then blue colour will be noticed in 1)A 2)B 3)In both A and B 4)neither in A nor in B

Discussion

44.	A ball of mass 1Kg is dropped from 20m height on ground and it rebounds to height 5m find the magnitude of change in momentum during its collision with the ground
Answer» A ball of mass 1Kg is dropped from 20m height on ground and it rebounds to height 5m find the magnitude of change in momentum during its collision with the ground

Discussion

45.	What happens to the potential energy between the atoms when we decrease the separation between them ? (this question was from HC VERMA )
Answer» What happens to the potential energy between the atoms when we decrease the separation between them ? (this question was from HC VERMA )

45.

What happens to the potential energy between the atoms when we decrease the separation between them ? (this question was from HC VERMA )

Answer»

What happens to the potential energy between the atoms when we decrease the separation between them ?

(this question was from HC VERMA )

Discussion

46.	For water how vibration mode gives specific heat as 9 R
Answer» For water how vibration mode gives specific heat as 9 R

Discussion

47.	10. Derive the relationship between the radius (r) of the octahedral void and radious (R) of the atoms in close packing
Answer» 10. Derive the relationship between the radius (r) of the octahedral void and radious (R) of the atoms in close packing

Discussion

48.	Why parent atom has greater radius(Mg> Mg+), in case of Mg and Na, Na>Mg , Na & Mg+ have same electrons , then why Mg> Mg+ ?
Answer» Why parent atom has greater radius(Mg> Mg+), in case of Mg and Na, Na>Mg , Na & Mg+ have same electrons , then why Mg> Mg+ ?

Discussion

49.	what is the oxidation number of c in C3O2?
Answer» what is the oxidation number of c in C3O2?

Discussion

50.	an x molal solution of a compound in benzene has mole fraction of solute equal to .2 the value of x is
Answer» an x molal solution of a compound in benzene has mole fraction of solute equal to .2 the value of x is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

32. Why hydrolysis of R-X by water is slower when Ag2O is suspended in water

Calculate the number of molecules of sulphur (S8) present in 16 g of solid sulphur.(Given, Atomic mass of sulphur =32 u and NA=6.022×1023)

Why are BeSO4 and MgSO4 readily solubel in water whle CaSO4,SrSO4 are insoluble?

The type of isomerism shown by [Co(en)2(NCS)2]Br and [Co(en)2(Br)2]NCS is

Howare xenon fluorides XeF2,XeF4and XeF6obtained?

difference between gravitational potential and gravitational potential energy. (in short)

The correct order of polarizability is I−,Br−,Cl−,F−

21 In the preparation of alkane by the reduction of alcohol, aldehyde and acid derivatives, how to find the n.o of moles of HI used during reduction?

What are functional equations

26.A certain aqueous solution of FeCl3 has density of 1.1g/ml and contains 20℅ FeCl3.Molar concentration of this solution

atmost how many isomer can bromohexane have ?

why p-toluidine is more basic than aniline

3 5 ml of H2O2 (aq) solution liberates 0.508 g of I2 from acidified KI solution. Calculate the volume strength of the H2O2 to solution.

p-Dichlorobenzenehas higher m.p. and lower solubility than those of o-and m-isomers.Discuss.

53. Which of the following IUPAC name is correct A) 1-Chloro-2,3-epoxypropane B) 3-chloro-1,2-epoxypropane

no of pi electrons in anthracene is 14why it is not 18 as antrhacene is fusion of 3 benzene rings

The total number of protons present in 124 g of NO−3 are:

The number of ions present in K3[Fe(CN)6] are

Why Pbcl2 reacts with with cl2 to give Pbcl4

Under which different conditions alpha.D. glucose and beta.d.glucose form?

Is it always necessary to balance an equation

The oxidation number of nitrogen atoms in NH4NO3 are:

what is substitution reaction

Butane-2-ol is[CPMT 1977, 89]

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)

what are continuous and discrete molecular species ?

The second ionization potential of an element M is the energy required to

What will be the product by reaction ofmethyl amine with nitrous acid? is it ether or alcoho

A certain diatomic molecule, AB has dipole moment 1.6D and the internuclear distance is 100pm. The percentage of electronic charge existing on more electronegative atom is 1. 33% 2. 25% 3. 50% 4. 10%

Which one of the following pair of species have the same bond order?

If the compressibility factor of H2 is 1.8, then the volume of one mole of real H2 at STP will be:

What is hydrogen bonding? When does it takes place?

Outline the principles of refining of metals by the following methods : (i) Zone refining (ii) Vapour phase refining

An orbital has only positive values of wave function at all distances from the nucleus. Find the value of (n+l) for this orbital.

For preparing a buffer of pH 6 by mixing sodium acetate and acetic acid the ratio of the concentration of salt and acid should be( Ka=10^-5)

The vander waal's equation of corresponding states for 1 mole of gas is [where Pc= critical pressure, Tc= critical temperature, Vc= critical volume] [π=PPc,ϕ=VVcand θ=TTc]

Calculate the weight of oxygen produced from thermal decomposition of 5 gram of potassium chlorate

The elevation in the boiling point of one molar aqueous solution of glucose is: (density = 1.2 g/mL)

why is tarataric acid optically active instead of having plane of symmetry??

Which Vitamin is responsible for absorbing calcium and phosphorous?

meaning of turgor

A ball of mass 1Kg is dropped from 20m height on ground and it rebounds to height 5m find the magnitude of change in momentum during its collision with the ground

What happens to the potential energy between the atoms when we decrease the separation between them ? (this question was from HC VERMA )

For water how vibration mode gives specific heat as 9 R

10. Derive the relationship between the radius (r) of the octahedral void and radious (R) of the atoms in close packing

Why parent atom has greater radius(Mg> Mg+), in case of Mg and Na, Na>Mg , Na & Mg+ have same electrons , then why Mg> Mg+ ?

what is the oxidation number of c in C3O2?

an x molal solution of a compound in benzene has mole fraction of solute equal to .2 the value of x is