46295 + Interview Questions in Chemistry

1.	If the threshold wavelength (λ0) for the ejection of an electron from a metal is 110 nm, then the work function for the photoelectric emission is:(Planck's constant (h) = 6.6×10−341.8×10−18 J s)
Answer» If the threshold wavelength $(λ_{0})$ for the ejection of an electron from a metal is 110 nm, then the work function for the photoelectric emission is: (Planck's constant (h) = $6.6 \times 10^{- 34} 1.8 \times 10^{- 18} J s$ )

Discussion

2.	Which of the following structure(s) is/are meso-2,3 butanediol?
Answer» Which of the following structure(s) is/are meso-2,3 butanediol?

Discussion

3.	The interionic distance for cesium chloride crystal will be
Answer» The interionic distance for cesium chloride crystal will be

Discussion

4.	Convert Acetylene toAcetaldehyde
Answer» Convert Acetylene toAcetaldehyde

Discussion

5.	What is the ratio of the average molecular kinetic energy of UF6 to that of H2 both at 300K?
Answer» What is the ratio of the average molecular kinetic energy of UF6 to that of H2 both at 300K?

Discussion

6.	19 predict the major product formed on nitration of meta-nitrotoluene.
Answer» 19 predict the major product formed on nitration of meta-nitrotoluene.

Discussion

7.	Which has lowest osmotic pressure at same temperature?(1) 100 ml of 1 M urea(2) 400 ml of 0.5 M KCI(3) 200 ml of 0.5 M glucose(4) 300 ml of 0.25 M K3PO4
Answer» Which has lowest osmotic pressure at same temperature?(1) 100 ml of 1 M urea(2) 400 ml of 0.5 M KCI(3) 200 ml of 0.5 M glucose(4) 300 ml of 0.25 M K3PO4

Discussion

8.	A sample of butane gas, C4H10 of unknown mass is contained in a vessel of unknown volume V at 25 ∘C and a pressure of 760 mm Hg. To this vessel, 8.6787 g of neon gas is added in such a way that no butane is lost from the vessel. The final pressure in the vessel is 1920 mm Hg at the same temprature. Calculate the volume of the vessel and the mass of butane.
Answer» A sample of butane gas, $C_{4} H_{10}$ of unknown mass is contained in a vessel of unknown volume $V$ at $25^{\circ} C$ and a pressure of $760 mm Hg$ . To this vessel, $8.6787 g$ of neon gas is added in such a way that no butane is lost from the vessel. The final pressure in the vessel is $1920 mm Hg$ at the same temprature. Calculate the volume of the vessel and the mass of butane.

Discussion

9.	Two liquids A and B have vapour pressure in the ratio P∘A:P∘B=1:3 at a certain temperature. Assume A and B form an ideal solution and the ratio of mole fractions of A to B in the vapour phase is 4:3. Then the mole fraction of B in the solution at the same temperature is:
Answer» Two liquids $A$ and $B$ have vapour pressure in the ratio $P_{A}^{\circ} : P_{B}^{\circ} = 1 : 3$ at a certain temperature. Assume $A$ and $B$ form an ideal solution and the ratio of mole fractions of $A$ to $B$ in the vapour phase is $4 : 3$ . Then the mole fraction of $B$ in the solution at the same temperature is:

Discussion

10.	9. Will 1,4-dimethylcyclohexane show geometrical isomerism or not
Answer» 9. Will 1,4-dimethylcyclohexane show geometrical isomerism or not

Discussion

11.	One mole of calcium phosphide on reaction with excess water gives
Answer» One mole of calcium phosphide on reaction with excess water gives

11.

One mole of calcium phosphide on reaction with excess water gives

Answer»

One mole of calcium phosphide on reaction with excess water gives

Discussion

12.	An aqueous solution of glucose was prepared by dissolving 18g in 90g of water. The relative lowering of vapour pressure is
Answer» An aqueous solution of glucose was prepared by dissolving 18g in 90g of water. The relative lowering of vapour pressure is

Discussion

13.	An organic compound having molecular formula C2H6O under goes oxidation with K2Cr2O7H2SO4 to produce X which contains 40% carbon, 6.7% hydrogen and 53.3% oxygen. The molecular formula of the compound X is
Answer» An organic compound having molecular formula $C_{2} H_{6} O$ under goes oxidation with $\frac{K_{2} C r_{2} O_{7}}{H_{2} S O_{4}}$ to produce X which contains $40 %$ carbon, $6.7 %$ hydrogen and $53.3 %$ oxygen. The molecular formula of the compound X is

Discussion

14.	what is the process of finding electronic configuration of at no. ≥100
Answer» what is the process of finding electronic configuration of at no. ≥100

Discussion

15.	For the gas-phase decomposition PCl5(g)△⇌PCl3(g)+Cl2(g):
Answer» For the gas-phase decomposition $P C l_{5} (g) △ ⇌ P C l_{3} (g) + C l_{2} (g) :$

Discussion

16.	Which one of the following molecular hydrides acts as a lewis acid?
Answer» Which one of the following molecular hydrides acts as a lewis acid?

Discussion

17.	ntAmong the following quantities which are extensive ?n nt1) standard enthalpy of vapourisationn nt2) standard enthalpy of formationn nt3) standard enthalpy of combustionn nt4) standard reaction enthalpyn
Answer» ntAmong the following quantities which are extensive ?n nt1) standard enthalpy of vapourisationn nt2) standard enthalpy of formationn nt3) standard enthalpy of combustionn nt4) standard reaction enthalpyn

Discussion

18.	Is ha\log enation possible in benzene by free radical mechanism?
Answer» Is ha\log enation possible in benzene by free radical mechanism?

Discussion

19.	The values of EN of A and B are 1.2 and 4.0 respectively. % ionic character in bond A - B is
Answer» The values of EN of A and B are 1.2 and 4.0 respectively. $%$ ionic character in bond A - B is

Discussion

20.	100 ml of each HCl solution having pH=5 and NaOH having pH=8 is mixed. How much volume of N/100 NaOH is required to neutralise to 20 ml of this mixture?
Answer» 100 ml of each HCl solution having pH=5 and NaOH having pH=8 is mixed. How much volume of N/100 NaOH is required to neutralise to 20 ml of this mixture?

Discussion

21.	If Kc for H2(g)+I2(g)→2HI(g) is 50, then Kc for HI(g) 12H2+12I2 is
Answer» $I f K_{c} f o r H_{2 (g)} + I_{2 (g)} \to 2 H I_{(g)} i s 50, t h e n K_{c} f o r H I_{(} g) \frac{1}{2} H_{2} + \frac{1}{2} I_{2} i s$

Discussion

22.	10131. An engine has an efficiency of 1/6. When thetemperature of sink is reduced by 62^° C, its efficiencyis doubled. Temperature of the source is\lbrack AIPMT (Prelims)-2007(1) 99^° C(2) 124^° C(3) 37^° C(4) 62^° C
Answer» 10131. An engine has an efficiency of 1/6. When thetemperature of sink is reduced by 62^° C, its efficiencyis doubled. Temperature of the source is\lbrack AIPMT (Prelims)-2007(1) 99^° C(2) 124^° C(3) 37^° C(4) 62^° C

Discussion

23.	Both geometrical and optical isomerism are shown by:
Answer» Both geometrical and optical isomerism are shown by:

Discussion

24.	The end product (major) in the following reaction is:
Answer» The end product (major) in the following reaction is:

Discussion

25.	63 What are alpha hydrogen?
Answer» 63 What are alpha hydrogen?

Discussion

26.	Among NH3,H2O and HF, which would you expect to have highest magnitude of hydrogen bonding and why?
Answer» Among $N H_{3}, H_{2} O$ and HF, which would you expect to have highest magnitude of hydrogen bonding and why?

Discussion

27.	Sgn(x^3) =?
Answer» Sgn(x^3) =?

Discussion

28.	The hydrated salt Na2CO3.xH2O undergoes 63% loss in mass on heating and becomes anhydrous .The value of x is (pls give explanation for necessary steps)
Answer» The hydrated salt Na2CO3.xH2O undergoes 63% loss in mass on heating and becomes anhydrous .The value of x is (pls give explanation for necessary steps)

Discussion

29.	Writethe equations involved in the following reactions:(i) Reimer-Tiemann reaction(ii) Kolbe’s reaction
Answer» Write the equations involved in the following reactions: (i) Reimer-Tiemann reaction (ii) Kolbe’s reaction

29.

Writethe equations involved in the following reactions:(i) Reimer-Tiemann reaction(ii) Kolbe’s reaction

Answer»

Write
the equations involved in the following reactions:

(i)
Reimer-Tiemann reaction

(ii)
Kolbe’s reaction

Discussion

30.	How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1 g?
Answer» How many unit cells are present in a cube-shaped ideal crystal of $N a C l$ of mass $1 g$ ?

Discussion

31.	Consider the following reaction,Major product (P) formed is[0.77 Mark]
Answer» Consider the following reaction, Major product (P) formed is [0.77 Mark]

Discussion

32.	Why H2O acts as unidentate molecule even though oxygen atom has 2 lone pair of electrons ?
Answer» Why H2O acts as unidentate molecule even though oxygen atom has 2 lone pair of electrons ?

Discussion

33.	The Equivalent weight of bivalent metal is 32.7 .Molecular weight of its chloride is:
Answer» The Equivalent weight of bivalent metal is 32.7 .Molecular weight of its chloride is:

Discussion

34.	In diamond, carbon atom occupy FCC lattice points as well as alternate tetrahedral voids. If edge length of the unit cell is 356 pm, then radius of carbon atom is
Answer» In diamond, carbon atom occupy FCC lattice points as well as alternate tetrahedral voids. If edge length of the unit cell is 356 pm, then radius of carbon atom is

Discussion

35.	Ques. Differentiate y with respect to x:- y = (ln x)(x^2) where ln stands for Natural Log
Answer» Ques. Differentiate y with respect to x:- y = (ln x)(x^2) where ln stands for Natural Log

Discussion

36.	When a hydrocarbon fuel is burnt, it always gives out carbon dioxide and water vapour. Do you agree?
Answer» When a hydrocarbon fuel is burnt, it always gives out carbon dioxide and water vapour. Do you agree?

Discussion

37.	Ratio of moles of Fe(\|\|) oxidized by equal volume of equimolar kmno4 and k2cr2o7 solution in acidic medium
Answer» Ratio of moles of Fe(\|\|) oxidized by equal volume of equimolar kmno4 and k2cr2o7 solution in acidic medium

Discussion

38.	Under which of the following conditions applied together, a gas deviates most from the ideal hevaviour? (a) Low pressure (b) High pressure (c) Low temperature (d) High temperature
Answer» Under which of the following conditions applied together, a gas deviates most from the ideal hevaviour? (a) Low pressure (b) High pressure (c) Low temperature (d) High temperature

38.

Under which of the following conditions applied together, a gas deviates most from the ideal hevaviour? (a) Low pressure (b) High pressure (c) Low temperature (d) High temperature

Answer»

Under which of the following conditions applied together, a gas deviates most from the ideal hevaviour?

(a) Low pressure (b) High pressure

(c) Low temperature (d) High temperature

Discussion

39.	If the ionisation energy for H atom is 13.6 eV, calculate the required energy in eV to excite it from the ground state to the first excited state.
Answer» If the ionisation energy for H atom is $13.6 e V$ , calculate the required energy in eV to excite it from the ground state to the first excited state.

Discussion

40.	A certain diatomic molecule, AB has dipole moment 1. 6 D and the internuclear distance is100 pm. The percentage of electronic charge exiting on more electronegative atom is
Answer» A certain diatomic molecule, AB has dipole moment 1. 6 D and the internuclear distance is100 pm. The percentage of electronic charge exiting on more electronegative atom is

Discussion

41.	In Allene (C3H4) the type(s) of hybridisation of carbon atoms is(are)What if we make it's structure as CH=_C-CH3
Answer» In Allene (C3H4) the type(s) of hybridisation of carbon atoms is(are) What if we make it's structure as CH=_C-CH3

Discussion

42.	21. what is the electronic configuration, bond order and magnetic property of NO
Answer» 21. what is the electronic configuration, bond order and magnetic property of NO

Discussion

43.	Which of the following can give aldol reaction with dil.NaOH ?
Answer» Which of the following can give aldol reaction with $d i l . N a O H$ ?

Discussion

44.	Vapour density of a volatile subs†an ce is 4 in comparison to methane (CH_4=1).Its molecular mass will be: (a) 8 (b) 2 (c) 64 (d) 12
Answer» Vapour density of a volatile subs†an ce is 4 in comparison to methane (CH_4=1).Its molecular mass will be: (a) 8 (b) 2 (c) 64 (d) 12

Discussion

45.	A hydrogen atom has an orbit which has a diameter of about 16.92 Ao. What is the maximum number of electrons that can be accommodated in that orbit?
Answer» A hydrogen atom has an orbit which has a diameter of about $16.92 A^{o}$ . What is the maximum number of electrons that can be accommodated in that orbit?

Discussion

46.	The treatment of CH3MgX with CH3−C≡C−H produces:
Answer» The treatment of $C H_{3} M g X$ with $C H_{3} - C \equiv C - H$ produces:

Discussion

47.	500 mL of a H2O2 solution on complete decomposition produces 2 moles of H2O, volume strength of H2O2 solution is:[Given : Volume of O2 is measured at 1 atm and 273 K]
Answer» $500 mL$ of a $H_{2} O_{2}$ solution on complete decomposition produces $2$ moles of $H_{2} O$ , volume strength of $H_{2} O_{2}$ solution is: [Given : Volume of $O_{2}$ is measured at $1 atm$ and $273 K$ ]

Discussion

48.	An aqueous solutionof glucose is made by dissolving 10g of glucose in 90g water at 303K. If the vapour pressure of pure water at 303K be 32.8mm Hg, what would be the vapour pressure of the solution?
Answer» An aqueous solutionof glucose is made by dissolving 10g of glucose in 90g water at 303K. If the vapour pressure of pure water at 303K be 32.8mm Hg, what would be the vapour pressure of the solution?

Discussion

49.	For de-excitation of electrons from n = 5 to n = 2 possible number of spectral lines emitted wil be
Answer» For de-excitation of electrons from n = 5 to n = 2 possible number of spectral lines emitted wil be

Discussion

50.	in the topic of dark reaction what is ''c3 or c4 pathway''
Answer» in the topic of dark reaction what is ''c3 or c4 pathway''

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If the threshold wavelength (λ0) for the ejection of an electron from a metal is 110 nm, then the work function for the photoelectric emission is:(Planck's constant (h) = 6.6×10−341.8×10−18 J s)

Which of the following structure(s) is/are meso-2,3 butanediol?

The interionic distance for cesium chloride crystal will be

Convert Acetylene toAcetaldehyde

What is the ratio of the average molecular kinetic energy of UF6 to that of H2 both at 300K?

19 predict the major product formed on nitration of meta-nitrotoluene.

Which has lowest osmotic pressure at same temperature?(1) 100 ml of 1 M urea(2) 400 ml of 0.5 M KCI(3) 200 ml of 0.5 M glucose(4) 300 ml of 0.25 M K3PO4

Two liquids A and B have vapour pressure in the ratio P∘A:P∘B=1:3 at a certain temperature. Assume A and B form an ideal solution and the ratio of mole fractions of A to B in the vapour phase is 4:3. Then the mole fraction of B in the solution at the same temperature is:

9. Will 1,4-dimethylcyclohexane show geometrical isomerism or not

One mole of calcium phosphide on reaction with excess water gives

An aqueous solution of glucose was prepared by dissolving 18g in 90g of water. The relative lowering of vapour pressure is

An organic compound having molecular formula C2H6O under goes oxidation with K2Cr2O7H2SO4 to produce X which contains 40% carbon, 6.7% hydrogen and 53.3% oxygen. The molecular formula of the compound X is

what is the process of finding electronic configuration of at no. ≥100

For the gas-phase decomposition PCl5(g)△⇌PCl3(g)+Cl2(g):

Which one of the following molecular hydrides acts as a lewis acid?

ntAmong the following quantities which are extensive ?n nt1) standard enthalpy of vapourisationn nt2) standard enthalpy of formationn nt3) standard enthalpy of combustionn nt4) standard reaction enthalpyn

Is ha\log enation possible in benzene by free radical mechanism?

The values of EN of A and B are 1.2 and 4.0 respectively. % ionic character in bond A - B is

100 ml of each HCl solution having pH=5 and NaOH having pH=8 is mixed. How much volume of N/100 NaOH is required to neutralise to 20 ml of this mixture?

If Kc for H2(g)+I2(g)→2HI(g) is 50, then Kc for HI(g) 12H2+12I2 is

10131. An engine has an efficiency of 1/6. When thetemperature of sink is reduced by 62^° C, its efficiencyis doubled. Temperature of the source is\lbrack AIPMT (Prelims)-2007(1) 99^° C(2) 124^° C(3) 37^° C(4) 62^° C

Both geometrical and optical isomerism are shown by:

The end product (major) in the following reaction is:

63 What are alpha hydrogen?

Among NH3,H2O and HF, which would you expect to have highest magnitude of hydrogen bonding and why?

Sgn(x^3) =?

The hydrated salt Na2CO3.xH2O undergoes 63% loss in mass on heating and becomes anhydrous .The value of x is (pls give explanation for necessary steps)

Writethe equations involved in the following reactions:(i) Reimer-Tiemann reaction(ii) Kolbe’s reaction

How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1 g?

Consider the following reaction,Major product (P) formed is[0.77 Mark]

Why H2O acts as unidentate molecule even though oxygen atom has 2 lone pair of electrons ?

The Equivalent weight of bivalent metal is 32.7 .Molecular weight of its chloride is:

In diamond, carbon atom occupy FCC lattice points as well as alternate tetrahedral voids. If edge length of the unit cell is 356 pm, then radius of carbon atom is

Ques. Differentiate y with respect to x:- y = (ln x)(x^2) where ln stands for Natural Log

When a hydrocarbon fuel is burnt, it always gives out carbon dioxide and water vapour. Do you agree?

Ratio of moles of Fe(||) oxidized by equal volume of equimolar kmno4 and k2cr2o7 solution in acidic medium

Under which of the following conditions applied together, a gas deviates most from the ideal hevaviour? (a) Low pressure (b) High pressure (c) Low temperature (d) High temperature

If the ionisation energy for H atom is 13.6 eV, calculate the required energy in eV to excite it from the ground state to the first excited state.

A certain diatomic molecule, AB has dipole moment 1. 6 D and the internuclear distance is100 pm. The percentage of electronic charge exiting on more electronegative atom is

In Allene (C3H4) the type(s) of hybridisation of carbon atoms is(are)What if we make it's structure as CH=_C-CH3

21. what is the electronic configuration, bond order and magnetic property of NO

Which of the following can give aldol reaction with dil.NaOH ?

Vapour density of a volatile subs†an ce is 4 in comparison to methane (CH_4=1).Its molecular mass will be: (a) 8 (b) 2 (c) 64 (d) 12

A hydrogen atom has an orbit which has a diameter of about 16.92 Ao. What is the maximum number of electrons that can be accommodated in that orbit?

The treatment of CH3MgX with CH3−C≡C−H produces:

500 mL of a H2O2 solution on complete decomposition produces 2 moles of H2O, volume strength of H2O2 solution is:[Given : Volume of O2 is measured at 1 atm and 273 K]

An aqueous solutionof glucose is made by dissolving 10g of glucose in 90g water at 303K. If the vapour pressure of pure water at 303K be 32.8mm Hg, what would be the vapour pressure of the solution?

For de-excitation of electrons from n = 5 to n = 2 possible number of spectral lines emitted wil be

in the topic of dark reaction what is ''c3 or c4 pathway''