46295 + Interview Questions in Chemistry

1.	Select the chair conformation of cyclohexane from the following.
Answer» Select the chair conformation of cyclohexane from the following.

Discussion

2.	Oxides which combine with water to form acids are called __ oxides.
Answer» Oxides which combine with water to form acids are called __ oxides.

Discussion

3.	We know that at equilibrium Ecell is zero but E(naught)cell is not zero?
Answer» We know that at equilibrium Ecell is zero but E(naught)cell is not zero?

Discussion

4.	Using the log table find the value of (0.021)^1/5
Answer» Using the log table find the value of (0.021)^1/5

Discussion

5.	which of the following is not oxidised by MnO21. F-2.Cl-3.Br-4.I-
Answer» which of the following is not oxidised by MnO2 1. F- 2.Cl- 3.Br- 4.I-

Discussion

6.	The wavelength range of the visible spectrum extends from violet (400 nm) to red (750 nm). Express these wavelength in frequencies (Hz). (1 nm = 10−9 m).
Answer» The wavelength range of the visible spectrum extends from violet (400 nm) to red (750 nm). Express these wavelength in frequencies (Hz). $(1 n m = 10^{- 9} m)$ .

Discussion

7.	Which of the following is correct regarding to bonding of Al2(CH3)6:- 1. 22(2C-2e bond ) & 2(3C-2e) bond 2. 4(2C-2e ) bond & 2(3C-2e) bond 3. All central atom are having complete octet 4. Molecule is planar
Answer» Which of the following is correct regarding to bonding of Al2(CH3)6:- 1. 22(2C-2e bond ) & 2(3C-2e) bond 2. 4(2C-2e ) bond & 2(3C-2e) bond 3. All central atom are having complete octet 4. Molecule is planar

Discussion

8.	What is the drawbacks of bohr model??
Answer» What is the drawbacks of bohr model??

Discussion

9.	Why do we heat heat the iron before we press the cloths?
Answer» Why do we heat heat the iron before we press the cloths?

Discussion

10.	5. Which of the following options represent correct composition of a gaseous mixture containing CH4 and N2O5 and vapour density equal to 19.5 ? 1) Mass % of CH4 is 25 2) Mole % of CH4 is 25 3) Mass % of CH4 is 75 4) Mole % of CH4 is 75
Answer» 5. Which of the following options represent correct composition of a gaseous mixture containing CH4 and N2O5 and vapour density equal to 19.5 ? 1) Mass % of CH4 is 25 2) Mole % of CH4 is 25 3) Mass % of CH4 is 75 4) Mole % of CH4 is 75

Discussion

11.	For chlorobenzene is -I effect considered or +M effect considered ?
Answer» For chlorobenzene is -I effect considered or +M effect considered ?

Discussion

12.	37. What is the volume strength of 1.5 N hydrogen peroxide solution
Answer» 37. What is the volume strength of 1.5 N hydrogen peroxide solution

Discussion

13.	Which of the following carbocations is least stable?
Answer» Which of the following carbocations is least stable?

Discussion

14.	The rate constant is numerical e numerically the same for 3 reaction of first second and third order respectively which one is true for rate of 3 reaction if concentration of reactant is greater than 1 M.r1=r2=r3 or r1is greater than r2 is greater than r3 or r1 is less than r2 is less than r3
Answer» The rate constant is numerical e numerically the same for 3 reaction of first second and third order respectively which one is true for rate of 3 reaction if concentration of reactant is greater than 1 M.r1=r2=r3 or r1is greater than r2 is greater than r3 or r1 is less than r2 is less than r3

Discussion

15.	27. At 627^° C and 1 atm SO3 is partially dissociated into SO2 and O2 by SO3 SO2+ 1/2O2 The density of the equilibrium mixture is 0.925g/L. What is degree of dissociation. 1) 40.20% 2) 34.12% 3) 57.32% 4) 21.11%
Answer» 27. At 627^° C and 1 atm SO3 is partially dissociated into SO2 and O2 by SO3<==> SO2+ 1/2O2 The density of the equilibrium mixture is 0.925g/L. What is degree of dissociation. 1) 40.20% 2) 34.12% 3) 57.32% 4) 21.11%

Discussion

16.	One mole each of H3PO2, H3PO3 and H3PO4 will neutralize 'x' mol of NaOH,'y' mol of Ca(OH)2 and 'z' mol of Al(OH)3 (assuming all to be strong electrolytes) respectively. x,y and z are in the ratio:
Answer» One mole each of $H_{3} P O_{2}, H_{3} P O_{3}$ and $H_{3} P O_{4}$ will neutralize ' $x$ ' mol of $N a O H,' y' mol of Ca {(O H)}_{2}$ and $' z' mol of Al {(O H)}_{3}$ (assuming all to be strong electrolytes) respectively. $x, y$ and $z$ are in the ratio:

Discussion

17.	50 mL solution having NaOH and Na2CO3 require, 0.5 M 10 mL HCl for complete titration with phenolphthalein indicator and another 50 mL solution require 0.5 M,12 mL HCl solution in methyl orange indicator then what is the ratio of number of mole of NaOH and Na2CO3?
Answer» $50 mL$ solution having $N a O H$ and $N a_{2} C O_{3}$ require, $0.5 M 10 mL H C l$ for complete titration with phenolphthalein indicator and another $50 mL$ solution require $0.5 M, 12 mL H C l$ solution in methyl orange indicator then what is the ratio of number of mole of $N a O H$ and $N a_{2} C O_{3}$ ?

Discussion

18.	10.Does Knoevenegel, Reformatsky and Perkin Reaction Lead to the formation of Cinnamic Acid Only?
Answer» 10.Does Knoevenegel, Reformatsky and Perkin Reaction Lead to the formation of Cinnamic Acid Only?

Discussion

19.	What is the major organic product of the following reaction?
Answer» What is the major organic product of the following reaction?

Discussion

20.	The strength of the bonds formed by overlapping of atomic orbitals is in the order:
Answer» The strength of the bonds formed by overlapping of atomic orbitals is in the order:

Discussion

21.	30. The percentage composition by weight of nonelectrolyte solute in an aqeuous solution(molecular mass of solute=150) which boils at 373.26K is (Kb=0.52 K kg/mol) 1) 2.6% 2) 7% 3) 5.2% 4) 17%
Answer» 30. The percentage composition by weight of nonelectrolyte solute in an aqeuous solution(molecular mass of solute=150) which boils at 373.26K is (Kb=0.52 K kg/mol) 1) 2.6% 2) 7% 3) 5.2% 4) 17%

Discussion

22.	Out of , which one is an example of benzylic halide?
Answer» Out of , which one is an example of benzylic halide?

Discussion

23.	Gas G also evolved by heating
Answer» Gas G also evolved by heating

Discussion

24.	Volume occupied by a gas at one atmospheric pressure and 0∘ C is V ml. Its volume at 273 K will be
Answer» Volume occupied by a gas at one atmospheric pressure and 0 $^{\circ}$ C is V ml. Its volume at 273 K will be

24.

Volume occupied by a gas at one atmospheric pressure and 0∘ C is V ml. Its volume at 273 K will be

Answer»

Volume occupied by a gas at one atmospheric pressure and 0 $^{\circ}$ C is V ml. Its volume at 273 K will be

Discussion

25.	In the following reaction:P4(s)+OH−(aq)→PH3(g)+H2PO−2(aq)Calculate the stoichiometric coefficient of OH− and H2O respectively present in a balanced equation in a basic medium?
Answer» In the following reaction: $P_{4} (s) + O H^{-} (a q) \to P H_{3} (g) + H_{2} P O_{2}^{-} (a q)$ Calculate the stoichiometric coefficient of $O H^{-}$ and $H_{2} O$ respectively present in a balanced equation in a basic medium?

Discussion

26.	The de Broglie wavelength of a particle with mass 1 gram and velocity 100 m/sec is
Answer» The de Broglie wavelength of a particle with mass 1 gram and velocity 100 m/sec is

Discussion

27.	Which of the following is the most ionic?
Answer» Which of the following is the most ionic?

Discussion

28.	50. Which has stronger intermolecular hydrogen bonding and why ? : HF or H2O
Answer» 50. Which has stronger intermolecular hydrogen bonding and why ? : HF or H2O

Discussion

29.	Write the IUPAC name of the following compound: CH3−CH3\|C\|CH3−CH\|Cl−CH3
Answer» Write the IUPAC name of the following compound: $C H_{3} - C H_{3} \| C \| C H_{3} - C H \| C l - C H_{3}$

Discussion

30.	If pH of pure water comes out to be 6 while solving numericals,then is the solution considered acidic?
Answer» If pH of pure water comes out to be 6 while solving numericals,then is the solution considered acidic?

Discussion

31.	18.A sampal of nitrogen occupies a volume of 350 cm3 at STP.Then,its volume at 550K and 0.5atm pressure is approximately (a) 1280 cm3 (b) 1409 cm3 (c) 1050 cm3 (d) 1428 cm3
Answer» 18.A sampal of nitrogen occupies a volume of 350 cm3 at STP.Then,its volume at 550K and 0.5atm pressure is approximately (a) 1280 cm3 (b) 1409 cm3 (c) 1050 cm3 (d) 1428 cm3

Discussion

32.	Which of the following reaction involves homogeneous reduction?
Answer» Which of the following reaction involves homogeneous reduction?

Discussion

33.	5. The number of Ions formed on dissolving 1 molecule of FeSO4(NH4)2SO4.6H2O is/are 1)6 2)3 3)5 4)4
Answer» 5. The number of Ions formed on dissolving 1 molecule of FeSO4(NH4)2SO4.6H2O is/are 1)6 2)3 3)5 4)4

Discussion

34.	{ 24. One mole of He is mixed with }2 moles of Ne, both at the }}{ same temperature and pressure. Determine }Δ S for the }}{ process in }J/K in nearest possible integers. If the total }}{ volume remain constant, }Δ S for the process in }J/K is }8X . }}{ The value of }X is }...}{\operatorname{log}3=0.48;\operatorname{log}2=0.3
Answer» { 24. One mole of He is mixed with }2 moles of Ne, both at the }}{ same temperature and pressure. Determine }Δ S for the }}{ process in }J/K in nearest possible integers. If the total }}{ volume remain constant, }Δ S for the process in }J/K is }8X . }}{ The value of }X is }...}{\operatorname{log}3=0.48;\operatorname{log}2=0.3

Discussion

35.	The Half Life period of zero order reaction was found to be 10 minutes when initial concentration was 1 mole per litre what will be the half life period if initial concentration is made to mole per litre
Answer» The Half Life period of zero order reaction was found to be 10 minutes when initial concentration was 1 mole per litre what will be the half life period if initial concentration is made to mole per litre

Discussion

36.	What is half life of second order reaction?
Answer» What is half life of second order reaction?

Discussion

37.	10. Why their is fix composition of element in compound
Answer» 10. Why their is fix composition of element in compound

Discussion

38.	For [CrCl3.XNH3] the elevation in boiling point of one molal aqueous solution is three times that of one molal aqueous solution of urea. Assuming 100% ionisation of the complex molecule and the coordination number of six, calculate the value of X.
Answer» For $[C r C l_{3} . X N H_{3}]$ the elevation in boiling point of one molal aqueous solution is three times that of one molal aqueous solution of urea. Assuming 100% ionisation of the complex molecule and the coordination number of six, calculate the value of X.

Discussion

39.	Lewis dot structure of P_4O_{6 }and P_4O_1
Answer» Lewis dot structure of P_4O_{6 }and P_4O_1

Discussion

40.	why KMnO_4 is coloured though its Mn have 0 electron in its d orbital
Answer» why KMnO_4 is coloured though its Mn have 0 electron in its d orbital

Discussion

41.	The wavelength of photons emitted by electron transition between two similar levels in H and He+ are λ1 and λ2 resepectively. Then the relation between λ1 and λ2 is:
Answer» The wavelength of photons emitted by electron transition between two similar levels in $H$ and $H e^{+}$ are $λ_{1}$ and $λ_{2}$ resepectively. Then the relation between $λ_{1} and λ_{2}$ is:

Discussion

42.	Acids turn blue litmus to
Answer» Acids turn blue litmus to

Discussion

43.	1,3-butadiene reacts with ethylene to form (a) benzene (b) cyclohexane (c) cyclohexene (d) 2,3 dimethyl butane
Answer» 1,3-butadiene reacts with ethylene to form (a) benzene (b) cyclohexane (c) cyclohexene (d) 2,3 dimethyl butane

Discussion

44.	Pd/BaSO4 is called as:.
Answer» $Pd / {BaSO}_{4} is called as :$ .

Discussion

45.	On treatment with chlorine in presence of sunlight, benzene gives the product
Answer» On treatment with chlorine in presence of sunlight, benzene gives the product

Discussion

46.	The correct order of C-O bond order among CO,CO_3^{2-} ,CO_{2 }is? HO
Answer» The correct order of C-O bond order among CO,CO_3^{2-} ,CO_{2 }is? HO

Discussion

47.	Lowering of vapour pressure due to solute in 1 molal aqueous solution at 100°C is BOOK ANSWER - 13.44 Torr MY SOLUTION Since molality is 1 mole kg-1 That's mean 1 mole of solute is present in 1 kg of solvent (H2O) No. Of moles of Water = 1000g/18 = 55.55 No. Of moles of solute = 1 Mole Fraction of solute = 1/1+55.55 = 0.0176 .... (I) Pressure of solvent (assuming ideal behaviour) PV = nRT P = 55.55 x 0.0821 x 373 / 1 (d of water = 1) P = 1701.2774 atm 1 atm = 760 Torr psolvent = 1292970.8 Torr We know from Raoult Law ∆p = Xsolute . P(solvent) ∆p = 0.0176 x 1292970.8 ∆p = 22756.286 So, According to my answer ∆p amount of vapour pressure will be low. But my answer and book answer is not same. I don't want solution of this question. You just tell me the place where I am going in wrong direction in my solution.
Answer» Lowering of vapour pressure due to solute in 1 molal aqueous solution at 100°C is BOOK ANSWER - 13.44 Torr MY SOLUTION Since molality is 1 mole kg^-1 That's mean 1 mole of solute is present in 1 kg of solvent (H₂O) No. Of moles of Water = 1000g/18 = 55.55 No. Of moles of solute = 1 Mole Fraction of solute = 1/1+55.55 = 0.0176 .... (I) Pressure of solvent (assuming ideal behaviour) PV = nRT P = 55.55 x 0.0821 x 373 / 1 (d of water = 1) P = 1701.2774 atm 1 atm = 760 Torr p_solvent= 1292970.8 Torr We know from Raoult Law ∆p = X_solute. P(solvent) ∆p = 0.0176 x 1292970.8 ∆p = 22756.286 So, According to my answer ∆p amount of vapour pressure will be low. But my answer and book answer is not same. I don't want solution of this question. You just tell me the place where I am going in wrong direction in my solution.

47.

Lowering of vapour pressure due to solute in 1 molal aqueous solution at 100°C is BOOK ANSWER - 13.44 Torr MY SOLUTION Since molality is 1 mole kg-1 That's mean 1 mole of solute is present in 1 kg of solvent (H2O) No. Of moles of Water = 1000g/18 = 55.55 No. Of moles of solute = 1 Mole Fraction of solute = 1/1+55.55 = 0.0176 .... (I) Pressure of solvent (assuming ideal behaviour) PV = nRT P = 55.55 x 0.0821 x 373 / 1 (d of water = 1) P = 1701.2774 atm 1 atm = 760 Torr psolvent = 1292970.8 Torr We know from Raoult Law ∆p = Xsolute . P(solvent) ∆p = 0.0176 x 1292970.8 ∆p = 22756.286 So, According to my answer ∆p amount of vapour pressure will be low. But my answer and book answer is not same. I don't want solution of this question. You just tell me the place where I am going in wrong direction in my solution.

Answer»

Lowering of vapour pressure due to solute in 1 molal aqueous solution at 100°C is

BOOK ANSWER - 13.44 Torr

MY SOLUTION

Since molality is 1 mole kg^-1

That's mean 1 mole of solute is present in 1 kg of solvent (H₂O)

No. Of moles of Water = 1000g/18 = 55.55

No. Of moles of solute = 1

Mole Fraction of solute = 1/1+55.55 = 0.0176 .... (I)

Pressure of solvent (assuming ideal behaviour)

PV = nRT

P = 55.55 x 0.0821 x 373 / 1 (d of water = 1)

P = 1701.2774 atm

1 atm = 760 Torr

p_solvent= 1292970.8 Torr

We know from Raoult Law

∆p = X_solute. P(solvent)

∆p = 0.0176 x 1292970.8

∆p = 22756.286

So, According to my answer ∆p amount of vapour pressure will be low. But my answer and book answer is not same.

I don't want solution of this question.

You just tell me the place where I am going in wrong direction in my solution.

Discussion

48.	The antibodies produced during Type I hypersensitivity
Answer» The antibodies produced during Type I hypersensitivity

Discussion

49.	Which of the following biphenyls hinders C−C single bond rotation?
Answer» Which of the following biphenyls hinders $C - C$ single bond rotation?

Discussion

50.	Give two examples to show the anomalous behaviour of fluorine.
Answer» Give two examples to show the anomalous behaviour of fluorine.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Select the chair conformation of cyclohexane from the following.

Oxides which combine with water to form acids are called __ oxides.

We know that at equilibrium Ecell is zero but E(naught)cell is not zero?

Using the log table find the value of (0.021)^1/5

which of the following is not oxidised by MnO21. F-2.Cl-3.Br-4.I-

The wavelength range of the visible spectrum extends from violet (400 nm) to red (750 nm). Express these wavelength in frequencies (Hz). (1 nm = 10−9 m).

Which of the following is correct regarding to bonding of Al2(CH3)6:- 1. 22(2C-2e bond ) & 2(3C-2e) bond 2. 4(2C-2e ) bond & 2(3C-2e) bond 3. All central atom are having complete octet 4. Molecule is planar

What is the drawbacks of bohr model??

Why do we heat heat the iron before we press the cloths?

5. Which of the following options represent correct composition of a gaseous mixture containing CH4 and N2O5 and vapour density equal to 19.5 ? 1) Mass % of CH4 is 25 2) Mole % of CH4 is 25 3) Mass % of CH4 is 75 4) Mole % of CH4 is 75

For chlorobenzene is -I effect considered or +M effect considered ?

37. What is the volume strength of 1.5 N hydrogen peroxide solution

Which of the following carbocations is least stable?

The rate constant is numerical e numerically the same for 3 reaction of first second and third order respectively which one is true for rate of 3 reaction if concentration of reactant is greater than 1 M.r1=r2=r3 or r1is greater than r2 is greater than r3 or r1 is less than r2 is less than r3

27. At 627^° C and 1 atm SO3 is partially dissociated into SO2 and O2 by SO3 SO2+ 1/2O2 The density of the equilibrium mixture is 0.925g/L. What is degree of dissociation. 1) 40.20% 2) 34.12% 3) 57.32% 4) 21.11%

One mole each of H3PO2, H3PO3 and H3PO4 will neutralize 'x' mol of NaOH,'y' mol of Ca(OH)2 and 'z' mol of Al(OH)3 (assuming all to be strong electrolytes) respectively. x,y and z are in the ratio:

50 mL solution having NaOH and Na2CO3 require, 0.5 M 10 mL HCl for complete titration with phenolphthalein indicator and another 50 mL solution require 0.5 M,12 mL HCl solution in methyl orange indicator then what is the ratio of number of mole of NaOH and Na2CO3?

10.Does Knoevenegel, Reformatsky and Perkin Reaction Lead to the formation of Cinnamic Acid Only?

What is the major organic product of the following reaction?

The strength of the bonds formed by overlapping of atomic orbitals is in the order:

30. The percentage composition by weight of nonelectrolyte solute in an aqeuous solution(molecular mass of solute=150) which boils at 373.26K is (Kb=0.52 K kg/mol) 1) 2.6% 2) 7% 3) 5.2% 4) 17%

Out of , which one is an example of benzylic halide?

Gas G also evolved by heating

Volume occupied by a gas at one atmospheric pressure and 0∘ C is V ml. Its volume at 273 K will be

In the following reaction:P4(s)+OH−(aq)→PH3(g)+H2PO−2(aq)Calculate the stoichiometric coefficient of OH− and H2O respectively present in a balanced equation in a basic medium?

The de Broglie wavelength of a particle with mass 1 gram and velocity 100 m/sec is

Which of the following is the most ionic?

50. Which has stronger intermolecular hydrogen bonding and why ? : HF or H2O

Write the IUPAC name of the following compound: CH3−CH3|C|CH3−CH|Cl−CH3

If pH of pure water comes out to be 6 while solving numericals,then is the solution considered acidic?

18.A sampal of nitrogen occupies a volume of 350 cm3 at STP.Then,its volume at 550K and 0.5atm pressure is approximately (a) 1280 cm3 (b) 1409 cm3 (c) 1050 cm3 (d) 1428 cm3

Which of the following reaction involves homogeneous reduction?

5. The number of Ions formed on dissolving 1 molecule of FeSO4(NH4)2SO4.6H2O is/are 1)6 2)3 3)5 4)4

The Half Life period of zero order reaction was found to be 10 minutes when initial concentration was 1 mole per litre what will be the half life period if initial concentration is made to mole per litre

What is half life of second order reaction?

10. Why their is fix composition of element in compound

For [CrCl3.XNH3] the elevation in boiling point of one molal aqueous solution is three times that of one molal aqueous solution of urea. Assuming 100% ionisation of the complex molecule and the coordination number of six, calculate the value of X.

Lewis dot structure of P_4O_{6 }and P_4O_1

why KMnO_4 is coloured though its Mn have 0 electron in its d orbital

The wavelength of photons emitted by electron transition between two similar levels in H and He+ are λ1 and λ2 resepectively. Then the relation between λ1 and λ2 is:

Acids turn blue litmus to

1,3-butadiene reacts with ethylene to form (a) benzene (b) cyclohexane (c) cyclohexene (d) 2,3 dimethyl butane

Pd/BaSO4 is called as:.

On treatment with chlorine in presence of sunlight, benzene gives the product

The correct order of C-O bond order among CO,CO_3^{2-} ,CO_{2 }is? HO

The antibodies produced during Type I hypersensitivity

Which of the following biphenyls hinders C−C single bond rotation?

Give two examples to show the anomalous behaviour of fluorine.