46295 + Interview Questions in Chemistry

1.	The variation of equilibrium constant (K) of a certain reaction with temperature (T) is lnK=3.0+2.0×104T given R=8.3 JK−1mol−1, the values of ΔHo and ΔSo are:
Answer» The variation of equilibrium constant ( $K$ ) of a certain reaction with temperature ( $T$ ) is $ln K = 3.0 + \frac{2.0 \times 10^{4}}{T}$ given $R = 8.3 J K^{- 1} m o l^{- 1}$ , the values of $Δ H^{o}$ and $Δ S^{o}$ are:

Discussion

2.	Which of the following compounds will most readily undergo electrophilic aromatic substitution ?
Answer» Which of the following compounds will most readily undergo electrophilic aromatic substitution ?

Discussion

3.	The number of revolution per second made by an electron in the first Bohr orbit of the hydrogen atom is of the order of,
Answer» The number of revolution per second made by an electron in the first Bohr orbit of the hydrogen atom is of the order of,

Discussion

4.	what is kerb's cycle?
Answer» what is kerb's cycle?

Discussion

5.	Which of the following orbitals can undergo hybridisation?
Answer» Which of the following orbitals can undergo hybridisation?

Discussion

6.	element X forms chloride with formula XCl_4 which is a solid with low melting point. In which group and period be X place
Answer» element X forms chloride with formula XCl_4 which is a solid with low melting point. In which group and period be X place

Discussion

7.	what is dawins finches?
Answer» what is dawins finches?

Discussion

8.	Which of the following will be more acidic?
Answer» Which of the following will be more acidic?

Discussion

9.	A mixture of 2.3g formic acid and 4.5g oxalic acid is treated with conc. H2SO4. The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be
Answer» A mixture of 2.3g formic acid and 4.5g oxalic acid is treated with conc. H2SO4. The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be

Discussion

10.	The s†an drard reducation potential of Ag^+/Ag electrode at 298K is 0.799V and K_{sp} (AgI) is 8.7×10^{-17}.Calutate the potential of Ag^+/Ag electrode in saturated solution of Agl.Also calculate the s†an dard reduction potential of I^-/AgI/Ag
Answer» The s†an drard reducation potential of Ag^+/Ag electrode at 298K is 0.799V and K_{sp} (AgI) is 8.7×10^{-17}.Calutate the potential of Ag^+/Ag electrode in saturated solution of Agl.Also calculate the s†an dard reduction potential of I^-/AgI/Ag

Discussion

11.	Which of the following reactions have maximum heat of neutralisation?
Answer» Which of the following reactions have maximum heat of neutralisation?

Discussion

12.	The conductivity of a saturated solution CaF_2 is found to be 4 ×10^{-5} S cm^{-1}. If λ m infinity= 104(Ca^{+2}) and λ m infinity =48(F^-) in S cm^2 mol^{-1}, the solubility product of CaF_2 will b
Answer» The conductivity of a saturated solution CaF_2 is found to be 4 ×10^{-5} S cm^{-1}. If λ m infinity= 104(Ca^{+2}) and λ m infinity =48(F^-) in S cm^2 mol^{-1}, the solubility product of CaF_2 will b

Discussion

13.	{ †ext { An element with atomic number } 106 †ext { has been } } { †ext { discovered recently. Which of the following } } { †ext { electronic configuration will it posses } } { †ext { 1) } [ R n ] 5 f ^ { 14 } 6 d ^ { 5 } 7 s ^ { 1 } †ext { 2) } [ R n ] 5 f ^ { 14 } 6 d ^ { 5 } 7 s ^ { 2 } } { †ext { 3) } [ R n ] 5 f ^ { 14 } 6 d ^ { 6 } 7 s ^ { 0 } †ext { 4) } [ R n ] 5 f ^ { 14 } 6 d ^ { 1 } 7 s ^ { 2 } 7 p ^ { 3 }
Answer» { †ext { An element with atomic number } 106 †ext { has been } } { †ext { discovered recently. Which of the following } } { †ext { electronic configuration will it posses } } { †ext { 1) } [ R n ] 5 f ^ { 14 } 6 d ^ { 5 } 7 s ^ { 1 } †ext { 2) } [ R n ] 5 f ^ { 14 } 6 d ^ { 5 } 7 s ^ { 2 } } { †ext { 3) } [ R n ] 5 f ^ { 14 } 6 d ^ { 6 } 7 s ^ { 0 } †ext { 4) } [ R n ] 5 f ^ { 14 } 6 d ^ { 1 } 7 s ^ { 2 } 7 p ^ { 3 }

Discussion

14.	21. Enthalpy changes for two reactions are given bythe equation(6)%0+(s)Cr O3(s), AH-1130 kJAH=-110 kJ'(6)0 (6)0+(s)The enthalpy change for the reactionCr Og+3C 2Cr 3CO will be(1) -1460 kJ(2) -800 kJ(3) +800 kJ(4) 1020 kJ
Answer» 21. Enthalpy changes for two reactions are given bythe equation(6)%0+(s)Cr O3(s), AH-1130 kJAH=-110 kJ'(6)0 (6)0+(s)The enthalpy change for the reactionCr Og+3C 2Cr 3CO will be(1) -1460 kJ(2) -800 kJ(3) +800 kJ(4) 1020 kJ

Discussion

15.	The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is :
Answer» The correct option for the number of body centred unit cells in all $14$ types of Bravais lattice unit cells is :

Discussion

16.	An element A crystallises in FCC lattice with an edge length of 362 pm. The radius of smallest atom that can fit into the octahedral void without disturbing the crystal structure?
Answer» An element A crystallises in FCC lattice with an edge length of 362 pm. The radius of smallest atom that can fit into the octahedral void without disturbing the crystal structure?

Discussion

17.	10mL of gaseous hydrocarbon was mixed with 100mL of oxygen and exploded in a eudiometer tube. The volume of the residual gases was 95mL out of which 20mL was absorbed by caustic soda the remaining by pyrogallol. The molecular formula of the gas is
Answer» 10mL of gaseous hydrocarbon was mixed with 100mL of oxygen and exploded in a eudiometer tube. The volume of the residual gases was 95mL out of which 20mL was absorbed by caustic soda the remaining by pyrogallol. The molecular formula of the gas is

Discussion

18.	Four of the lowest energy levels of H−atom are shown in the figure. The number of possible emission lines should be,
Answer» Four of the lowest energy levels of $H -$ atom are shown in the figure. The number of possible emission lines should be,

Discussion

19.	(ΔH − ΔU) for the formation of carbon monoxide (CO) from its elements at 298 K is ( R = 8.314 J K−1 mol−1)
Answer» $(Δ H - Δ U)$ for the formation of carbon monoxide ( $C O$ ) from its elements at $298 K$ is ( $R = 8.314 J K^{- 1} m o l^{- 1}$ )

Discussion

20.	Question 2Discuss:(a) Riya pours some water from her bottle into another bottle. Does it change the shape of the water?(b) Halima picks up a small stone from the ground and puts it in the water in a dish. Does the shape of the stone change?
Answer» Question 2 Discuss: (a) Riya pours some water from her bottle into another bottle. Does it change the shape of the water? (b) Halima picks up a small stone from the ground and puts it in the water in a dish. Does the shape of the stone change?

20.

Question 2Discuss:(a) Riya pours some water from her bottle into another bottle. Does it change the shape of the water?(b) Halima picks up a small stone from the ground and puts it in the water in a dish. Does the shape of the stone change?

Answer»

Question 2

Discuss:

(a) Riya pours some water from her bottle into another bottle. Does it change the shape of the water?

(b) Halima picks up a small stone from the ground and puts it in the water in a dish. Does the shape of the stone change?

Discussion

21.	Is the any way to find out whether a reaction is reversible or irreversible reaction?
Answer» Is the any way to find out whether a reaction is reversible or irreversible reaction?

Discussion

22.	39. Is CH3-CH=C=CH-CH3 an optically active compound? Explain.
Answer» 39. Is CH3-CH=C=CH-CH3 an optically active compound? Explain.

Discussion

23.	The following molecule is fluorometholone, a steroidal anti-inflammatory agent. How many stereogenic centers does it contain?
Answer» The following molecule is fluorometholone, a steroidal anti-inflammatory agent. How many stereogenic centers does it contain?

Discussion

24.	The most acidic of the following is
Answer» The most acidic of the following is

Discussion

25.	Which of the following are diasteromers?
Answer» Which of the following are diasteromers?

Discussion

26.	Which one of the following group of atoms or ions is not isoelectronic?
Answer» Which one of the following group of atoms or ions is not isoelectronic?

Discussion

27.	21 g of nitrogen gas is mixed with 1.2 moles of SO2 gas and 1.21×1023 molecules of O2 gas. Find the volume of the gaseous mixture (assuming no reaction) at STP.
Answer» $21 g$ of nitrogen gas is mixed with 1.2 moles of $S O_{2}$ gas and $1.21 \times 10^{23}$ molecules of $O_{2}$ gas. Find the volume of the gaseous mixture (assuming no reaction) at STP.

Discussion

28.	46. 11.2 litre of co2 at 273 degree Celsius and 1 atm pressure contains how many no. of atoms ?
Answer» 46. 11.2 litre of co2 at 273 degree Celsius and 1 atm pressure contains how many no. of atoms ?

Discussion

29.	Which of the following can be considered as a buffer solution:
Answer» Which of the following can be considered as a buffer solution:

Discussion

30.	Why do polymerisation reaction using PCR technique require high temperature like 70 degree Celsius
Answer» Why do polymerisation reaction using PCR technique require high temperature like 70 degree Celsius

Discussion

31.	2methyl butane on reaction with chlorine and bromine in presence of sunlight gives some products.write major product of both these reactions.
Answer» 2methyl butane on reaction with chlorine and bromine in presence of sunlight gives some products.write major product of both these reactions.

Discussion

32.	Many of the important scientific laws were discovered during experiments designed to ___________other phenomena suggest that experimental results are the ___________ of the inevitable naturalforce rather than of planning.
Answer» Many of the important scientific laws were discovered during experiments designed to ___________other phenomena suggest that experimental results are the ___________ of the inevitable naturalforce rather than of planning.

Discussion

33.	Inwhich of the following crystals alternate tetrahedral voids are occupied?[IIT 2005]
Answer» In which of the following crystals alternate tetrahedral voids are occupied? [IIT 2005]

33.

Inwhich of the following crystals alternate tetrahedral voids are occupied?[IIT 2005]

Answer»

In
which of the following crystals alternate tetrahedral voids are occupied?

[IIT 2005]

Discussion

34.	Do 3*10^8 has infinite no. of significant figures?
Answer» Do 3*10^8 has infinite no. of significant figures?

Discussion

35.	Is empty space is present between the two atoms of gold foil or it is only present within the atom?
Answer» Is empty space is present between the two atoms of gold foil or it is only present within the atom?

Discussion

36.	which one is the most stablecyclopropane cyclobutanecyclopentanecyclohexane what is the stability order of cyclohydrocarbons
Answer» which one is the most stable cyclopropane cyclobutane cyclopentane cyclohexane what is the stability order of cyclohydrocarbons

Discussion

37.	Balance the following redox reactions by ion-electron method: MnO−4(aq)+I−(aq)→MnO2(s)+I2(s) (in basic medium) MnO−4(aq)+SO2(g)→Mn2+(aq)+(aq)HSO−4(aq) (in acidic solution) H2O2(aq)+Fe2+(aq)→Fe3+(aq)+H2O(l) (in acidic solution) Cr2O2−7+SO2(g)→Cr3+(aq)+SO2−4 (aq) (in acidic solution)
Answer» Balance the following redox reactions by ion-electron method: $M n O_{4}^{-} (a q) + I^{-} (a q) \to M n O_{2} (s) + I_{2} (s)$ (in basic medium) $M n O_{4}^{-} (a q) + S O_{2} (g) \to M n^{2 +} (a q) + (a q) H S O_{4 (a q)}^{-}$ (in acidic solution) $H_{2} O_{2} (a q) + F e^{2 +} (a q) \to F e^{3 +} (a q) + H_{2} O (l)$ (in acidic solution) $C r_{2} O_{7}^{2 -} + S O_{2} (g) \to C r^{3 +} (a q) + S O_{4}^{2 -}$ (aq) (in acidic solution)

37.

Balance the following redox reactions by ion-electron method: MnO−4(aq)+I−(aq)→MnO2(s)+I2(s) (in basic medium) MnO−4(aq)+SO2(g)→Mn2+(aq)+(aq)HSO−4(aq) (in acidic solution) H2O2(aq)+Fe2+(aq)→Fe3+(aq)+H2O(l) (in acidic solution) Cr2O2−7+SO2(g)→Cr3+(aq)+SO2−4 (aq) (in acidic solution)

Answer»

Balance the following redox reactions by ion-electron method:
$M n O_{4}^{-} (a q) + I^{-} (a q) \to M n O_{2} (s) + I_{2} (s)$ (in basic medium)

$M n O_{4}^{-} (a q) + S O_{2} (g) \to M n^{2 +} (a q) + (a q) H S O_{4 (a q)}^{-}$ (in acidic solution)

$H_{2} O_{2} (a q) + F e^{2 +} (a q) \to F e^{3 +} (a q) + H_{2} O (l)$ (in acidic solution)

$C r_{2} O_{7}^{2 -} + S O_{2} (g) \to C r^{3 +} (a q) + S O_{4}^{2 -}$ (aq) (in acidic solution)

Discussion

38.	Perovskite is a mineral that has calcium, oxygen and titanium. The unit cell of it's crystalline structure is shown below The formula of Perovskite and the oxidation number of titanium are respectively:
Answer» Perovskite is a mineral that has calcium, oxygen and titanium. The unit cell of it's crystalline structure is shown below The formula of Perovskite and the oxidation number of titanium are respectively:

Discussion

39.	26.Which bond is strongest 1)1s--1s. 2)2p----2p. 3)2s---2p. 4)1s---2p
Answer» 26.Which bond is strongest 1)1s--1s. 2)2p----2p. 3)2s---2p. 4)1s---2p

Discussion

40.	For a reaction at 298k A+B gives u C+D : ∆H = -10kJ/mol, ∆S = -33.3kJ/mol. At what temperature will be the reaction become spontaneous in the forward direction ?
Answer» For a reaction at 298k A+B gives u C+D : ∆H = -10kJ/mol, ∆S = -33.3kJ/mol. At what temperature will be the reaction become spontaneous in the forward direction ?

Discussion

41.	Which of the following reactions involves oxidation-reduction
Answer» Which of the following reactions involves oxidation-reduction

41.

Which of the following reactions involves oxidation-reduction

Answer»

Which of the following reactions involves oxidation-reduction

Discussion

42.	In which case n-factor of underlined species is incorrect?
Answer» In which case n-factor of underlined species is incorrect?

Discussion

43.	In the given sequence reaction which of the following is the correct structure of compounds A?
Answer» In the given sequence reaction which of the following is the correct structure of compounds A?

Discussion

44.	39. Which one is more acidic and why ,propanoic acid and propenoic acid
Answer» 39. Which one is more acidic and why ,propanoic acid and propenoic acid

Discussion

45.	The product of reaction,
Answer» The product of reaction,

45.

The product of reaction,

Answer»

The product of reaction,

Discussion

46.	what is law of reciprocal proportion
Answer» what is law of reciprocal proportion

Discussion

47.	If α is the degree of dissociation of the reaction 2H2S(g)⇋2H2(g)+S2(g) and p is total equilibrium pressure, then Kp of the reaction is given by
Answer» If $α$ is the degree of dissociation of the reaction $2 H_{2} S (g) ⇋ 2 H_{2} (g) + S_{2} (g)$ and p is total equilibrium pressure, then $K_{p}$ of the reaction is given by

Discussion

48.	57 The electrode potentials for Cu2+(aq) + e -------> Cu+(aq) and Cu+(aq) + e ---------> Cu(s) are +0.15 V and +0.50 V respectively. The value of E^° 2+ Cu /Cu will be : (1) 0.500 V (2) 0.325 V (3) 0.650 V (4) 0.150 V 53.
Answer» 57 The electrode potentials for Cu2+(aq) + e -------> Cu+(aq) and Cu+(aq) + e ---------> Cu(s) are +0.15 V and +0.50 V respectively. The value of E^° 2+ Cu /Cu will be : (1) 0.500 V (2) 0.325 V (3) 0.650 V (4) 0.150 V 53.

Discussion

49.	Graph of Radial Probability density v/s distance r of the electron from nucleus of 2s can be
Answer» Graph of Radial Probability density v/s distance r of the electron from nucleus of 2s can be

Discussion

50.	Why Cr(24) has an empty 4p shell though it does not have any electrons in it?
Answer» Why Cr(24) has an empty 4p shell though it does not have any electrons in it?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The variation of equilibrium constant (K) of a certain reaction with temperature (T) is lnK=3.0+2.0×104T given R=8.3 JK−1mol−1, the values of ΔHo and ΔSo are:

Which of the following compounds will most readily undergo electrophilic aromatic substitution ?

The number of revolution per second made by an electron in the first Bohr orbit of the hydrogen atom is of the order of,

what is kerb's cycle?

Which of the following orbitals can undergo hybridisation?

element X forms chloride with formula XCl_4 which is a solid with low melting point. In which group and period be X place

what is dawins finches?

Which of the following will be more acidic?

A mixture of 2.3g formic acid and 4.5g oxalic acid is treated with conc. H2SO4. The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be

The s†an drard reducation potential of Ag^+/Ag electrode at 298K is 0.799V and K_{sp} (AgI) is 8.7×10^{-17}.Calutate the potential of Ag^+/Ag electrode in saturated solution of Agl.Also calculate the s†an dard reduction potential of I^-/AgI/Ag

Which of the following reactions have maximum heat of neutralisation?

The conductivity of a saturated solution CaF_2 is found to be 4 ×10^{-5} S cm^{-1}. If λ m infinity= 104(Ca^{+2}) and λ m infinity =48(F^-) in S cm^2 mol^{-1}, the solubility product of CaF_2 will b

21. Enthalpy changes for two reactions are given bythe equation(6)%0+(s)Cr O3(s), AH-1130 kJAH=-110 kJ'(6)0 (6)0+(s)The enthalpy change for the reactionCr Og+3C 2Cr 3CO will be(1) -1460 kJ(2) -800 kJ(3) +800 kJ(4) 1020 kJ

The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is :

An element A crystallises in FCC lattice with an edge length of 362 pm. The radius of smallest atom that can fit into the octahedral void without disturbing the crystal structure?

10mL of gaseous hydrocarbon was mixed with 100mL of oxygen and exploded in a eudiometer tube. The volume of the residual gases was 95mL out of which 20mL was absorbed by caustic soda the remaining by pyrogallol. The molecular formula of the gas is

Four of the lowest energy levels of H−atom are shown in the figure. The number of possible emission lines should be,

(ΔH − ΔU) for the formation of carbon monoxide (CO) from its elements at 298 K is ( R = 8.314 J K−1 mol−1)

Question 2Discuss:(a) Riya pours some water from her bottle into another bottle. Does it change the shape of the water?(b) Halima picks up a small stone from the ground and puts it in the water in a dish. Does the shape of the stone change?

Is the any way to find out whether a reaction is reversible or irreversible reaction?

39. Is CH3-CH=C=CH-CH3 an optically active compound? Explain.

The following molecule is fluorometholone, a steroidal anti-inflammatory agent. How many stereogenic centers does it contain?

The most acidic of the following is

Which of the following are diasteromers?

Which one of the following group of atoms or ions is not isoelectronic?

21 g of nitrogen gas is mixed with 1.2 moles of SO2 gas and 1.21×1023 molecules of O2 gas. Find the volume of the gaseous mixture (assuming no reaction) at STP.

46. 11.2 litre of co2 at 273 degree Celsius and 1 atm pressure contains how many no. of atoms ?

Which of the following can be considered as a buffer solution:

Why do polymerisation reaction using PCR technique require high temperature like 70 degree Celsius

2methyl butane on reaction with chlorine and bromine in presence of sunlight gives some products.write major product of both these reactions.

Many of the important scientific laws were discovered during experiments designed to ___________other phenomena suggest that experimental results are the ___________ of the inevitable naturalforce rather than of planning.

Inwhich of the following crystals alternate tetrahedral voids are occupied?[IIT 2005]

Do 3*10^8 has infinite no. of significant figures?

Is empty space is present between the two atoms of gold foil or it is only present within the atom?

which one is the most stablecyclopropane cyclobutanecyclopentanecyclohexane what is the stability order of cyclohydrocarbons

Perovskite is a mineral that has calcium, oxygen and titanium. The unit cell of it's crystalline structure is shown below The formula of Perovskite and the oxidation number of titanium are respectively:

26.Which bond is strongest 1)1s--1s. 2)2p----2p. 3)2s---2p. 4)1s---2p

For a reaction at 298k A+B gives u C+D : ∆H = -10kJ/mol, ∆S = -33.3kJ/mol. At what temperature will be the reaction become spontaneous in the forward direction ?

Which of the following reactions involves oxidation-reduction

In which case n-factor of underlined species is incorrect?

In the given sequence reaction which of the following is the correct structure of compounds A?

39. Which one is more acidic and why ,propanoic acid and propenoic acid

The product of reaction,

what is law of reciprocal proportion

If α is the degree of dissociation of the reaction 2H2S(g)⇋2H2(g)+S2(g) and p is total equilibrium pressure, then Kp of the reaction is given by

57 The electrode potentials for Cu2+(aq) + e -------> Cu+(aq) and Cu+(aq) + e ---------> Cu(s) are +0.15 V and +0.50 V respectively. The value of E^° 2+ Cu /Cu will be : (1) 0.500 V (2) 0.325 V (3) 0.650 V (4) 0.150 V 53.

Graph of Radial Probability density v/s distance r of the electron from nucleus of 2s can be

Why Cr(24) has an empty 4p shell though it does not have any electrons in it?

Many of the important scientific laws were discovered during experiments designed to _other phenomena suggest that experimental results are the _ of the inevitable naturalforce rather than of planning.