46295 + Interview Questions in Chemistry

1.	If i0,irms and imean are the values of peak, rms and mean currents of a.c, then
Answer» If $i_{0}, i_{r m s} a n d i_{m e a n}$ are the values of peak, rms and mean currents of a.c, then

Discussion

2.	An aromatic amine (A) was treated with alcoholic potash and another compound (Y) when a foul smelling gas was formed with formula C6H5NC. (Y) was formed upon reaction of a compound (Z) with Cl2 in the presence of slaked lime. Identify compound (Z) from the following options.
Answer» An aromatic amine (A) was treated with alcoholic potash and another compound (Y) when a foul smelling gas was formed with formula $C_{6} H_{5} N C .$ (Y) was formed upon reaction of a compound (Z) with $C l_{2}$ in the presence of slaked lime. Identify compound (Z) from the following options.

Discussion

3.	A hydrocarbon `x' decolourises bromine water. On hydrogenation `x' gives 2-methyl butane. On ozonalysis it gives acetone and acetaldehyde as the products. The hydrocarbon `x' is
Answer» A hydrocarbon `x' decolourises bromine water. On hydrogenation `x' gives 2-methyl butane. On ozonalysis it gives acetone and acetaldehyde as the products. The hydrocarbon `x' is

3.

A hydrocarbon `x' decolourises bromine water. On hydrogenation `x' gives 2-methyl butane. On ozonalysis it gives acetone and acetaldehyde as the products. The hydrocarbon `x' is

Answer»

A hydrocarbon `x' decolourises bromine water. On hydrogenation `x' gives

2-methyl butane. On ozonalysis it gives acetone and acetaldehyde as the

products. The hydrocarbon `x' is

Discussion

4.	What weight of CaCO3 must be decomposed to produce a sufficient quantity of carbon dioxide to convert 21.2 g of Na2CO3 completely into NaHCO3. (Molar mass of Na=23 g/mol,Ca=40 g/mol):CaCO3→CaO+CO2 Na2CO3+CO2+H2O→2NaHCO3
Answer» What weight of $C a C O_{3}$ must be decomposed to produce a sufficient quantity of carbon dioxide to convert $21.2 g$ of $N a_{2} C O_{3}$ completely into $N a H C O_{3}$ . (Molar mass of $N a = 23 g/mol, C a = 40 g/mol$ ): $C a C O_{3} \to C a O + C O_{2}$ $N a_{2} C O_{3} + C O_{2} + H_{2} O \to 2 N a H C O_{3}$

Discussion

5.	Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseoushydrocarbon containing less than four carbon atoms. (A) is:
Answer» Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is:

Discussion

6.	11.The PV-graph for a monoatomic gas is shown in the figure. Find the energy absorbed by the gas during this process.
Answer» 11.The PV-graph for a monoatomic gas is shown in the figure. Find the energy absorbed by the gas during this process.

Discussion

7.	The number of particles crossing per unit area perpendicular to Z axis per unit time is given by N=-D{N2-N1}/ {Z2-Z1} , where N2 and N1 are the number of particles per unit volume at Z2 and Z1 respectively. What is the dimensional formula for D?
Answer» The number of particles crossing per unit area perpendicular to Z axis per unit time is given by N=-D{N2-N1}/ {Z2-Z1} , where N2 and N1 are the number of particles per unit volume at Z2 and Z1 respectively. What is the dimensional formula for D?

Discussion

8.	Sodium oxalate on heating with conc. H2SO4 gives
Answer» Sodium oxalate on heating with conc. $H_{2} S O_{4}$ gives

Discussion

9.	1 kg of a gas does 20 kJ of work and receives 16 kJ of heat when it is expanded between two states. A second kind of expansion can be found between the initial and final state which requires a heat input of 9 kJ. The work done by the gas in the second expansion is
Answer» $1 kg$ of a gas does $20 kJ$ of work and receives $16 kJ$ of heat when it is expanded between two states. A second kind of expansion can be found between the initial and final state which requires a heat input of $9 kJ$ . The work done by the gas in the second expansion is

Discussion

10.	What is the acid where replacable atom is 2
Answer» What is the acid where replacable atom is 2

Discussion

11.	Question 12(b)A milkman adds a very small amount of baking soda to fresh milk.(b) Why does this milk take a long time to set as curd?
Answer» Question 12(b) A milkman adds a very small amount of baking soda to fresh milk. (b) Why does this milk take a long time to set as curd?

Discussion

12.	What is muonic hydrogen atom? How to calculate its ionization enthalpy
Answer» What is muonic hydrogen atom? How to calculate its ionization enthalpy

Discussion

13.	Does a FCC Tetragonal unit cell exist?
Answer» Does a FCC Tetragonal unit cell exist?

Discussion

14.	The polymer of ethene is known as
Answer» The polymer of ethene is known as

Discussion

15.	Which of the following molecules has three-fold axis of symmetry[UPSEAT 2004]
Answer» Which of the following molecules has three-fold axis of symmetry [UPSEAT 2004]

15.

Which of the following molecules has three-fold axis of symmetry[UPSEAT 2004]

Answer»

Which of the following molecules has three-fold axis of symmetry

[UPSEAT 2004]

Discussion

16.	Which of the following has high heat of hydrogenation? a.but-2-ene b.2-methylprop-1-ene c.2,2-dimethylbut-2-ene d.2-methylbut-2-ene
Answer» Which of the following has high heat of hydrogenation? a.but-2-ene b.2-methylprop-1-ene c.2,2-dimethylbut-2-ene d.2-methylbut-2-ene

Discussion

17.	What is spectrochemical series? Explain the difference between a weak field ligand and a strong field ligand.
Answer» What is spectrochemical series? Explain the difference between a weak field ligand and a strong field ligand.

Discussion

18.	But 1 yne and but 1 ene can be chemically distinguished by
Answer» But 1 yne and but 1 ene can be chemically distinguished by

Discussion

19.	38. how pai is irational derive
Answer» 38. how pai is irational derive

Discussion

20.	what is polyspermy
Answer» what is polyspermy

Discussion

21.	A meter-scale is made of copper and iron rods as shown in the figure. If the length of copper rod is λ meter and the coefficients of linear expansion of copper and iron are α1 and α2 respectively, then the equivalent coefficient of linear expansion of the combined material of the meter-scale is
Answer» A meter-scale is made of copper and iron rods as shown in the figure. If the length of copper rod is $λ$ meter and the coefficients of linear expansion of copper and iron are $α_{1}$ and $α_{2}$ respectively, then the equivalent coefficient of linear expansion of the combined material of the meter-scale is

Discussion

22.	Calculate the heat of formation of acetic acid from the following data.CH3COOH(l) + 2O2(g) →2CO2(g) + 2H2O(l), △H= −207.9 K calC(s) + O2(g)→CO2(g) △H = −94.48 K calH2(g) + 12O2(g)→H2O(l) △ H = −68.4 K cal
Answer» Calculate the heat of formation of acetic acid from the following data. $C H_{3} C O O H (l) + 2 O_{2} (g) \to 2 C O_{2} (g) + 2 H_{2} O (l), △ H = - 207.9 K c a l$ $C (s) + O_{2} (g) \to C O 2 (g) △ H = - 94.48 K c a l$ $H_{2} (g) + \frac{1}{2} O_{2} (g) \to H_{2} O (l) △ H = - 68.4 K c a l$

Discussion

23.	34 Oxidation no. Of cr in [Cr(NO)(NH3)2]cl2br
Answer» 34 Oxidation no. Of cr in [Cr(NO)(NH3)2]cl2br

Discussion

24.	What is the dimension formula of epcilon ?
Answer» What is the dimension formula of epcilon ?

Discussion

25.	Electronic configuration of Pd (Z=46) is (1) (Kr) 4d^85s^2 (2) (Kr) 4d^9 5s^1 (3) (Kr) 4d^{10}5s^0 (4) 4d^75s^1
Answer» Electronic configuration of Pd (Z=46) is (1) (Kr) 4d^85s^2 (2) (Kr) 4d^9 5s^1 (3) (Kr) 4d^{10}5s^0 (4) 4d^75s^1

Discussion

26.	how much chlorine can be absorbed by 1g activated chlorine
Answer» how much chlorine can be absorbed by 1g activated chlorine

Discussion

27.	Calculate the radius of tetrahedral void present in the unit cell of an atom X which crystallizes in fcc unit cell having an edge length a=50√2 pm
Answer» Calculate the radius of tetrahedral void present in the unit cell of an atom X which crystallizes in fcc unit cell having an edge length $a = 50 \sqrt{2} p m$

Discussion

28.	Which of the following will liberate H2 when reacting with NaOH?
Answer» Which of the following will liberate H $_{2}$ when reacting with NaOH?

Discussion

29.	17. The volume of H2 gas produced at STP in lane's process by 10g Fe (44./. Impure ) is
Answer» 17. The volume of H2 gas produced at STP in lane's process by 10g Fe (44./. Impure ) is

Discussion

30.	24. In which of the following pairs hydrogen bonding is not possible and why ? A NH3, NH3 B NH3, CH4 C H2O, CH3OCH3 D CH3OH, CH3OCH3
Answer» 24. In which of the following pairs hydrogen bonding is not possible and why ? A NH3, NH3 B NH3, CH4 C H2O, CH3OCH3 D CH3OH, CH3OCH3

Discussion

31.	which among CH4,CO2,H2O,SF6 have bond angle nearly 90degree
Answer» which among CH4,CO2,H2O,SF6 have bond angle nearly 90degree

Discussion

32.	Is burning of natural gas a combination reaction
Answer» Is burning of natural gas a combination reaction

Discussion

33.	63 Propyl benzene reacts with bromine in presence of light to give the major product X. What is X?
Answer» 63 Propyl benzene reacts with bromine in presence of light to give the major product X. What is X?

Discussion

34.	The radius of H-atom is supposed to be 0.53 Angstrom. Assuming that atom is spherical, the weight of hydrogen atom is (density of hydrogen atom = 2.675 g/cm^3)
Answer» The radius of H-atom is supposed to be 0.53 Angstrom. Assuming that atom is spherical, the weight of hydrogen atom is (density of hydrogen atom = 2.675 g/cm^3)

Discussion

35.	For reaction: A + B → Products, the rate if the reaction at various concentration are given below:Expt. No.(A)(B)Rate10.20.2220.20.4430.60.436
Answer» For reaction: A + B $\to$ Products, the rate if the reaction at various concentration are given below: $\begin{matrix} E x p t . N o . & (A) & (B) & R a t e 1 & 0.2 & 0.2 & 2 2 & 0.2 & 0.4 & 4 3 & 0.6 & 0.4 & 36 \end{matrix}$

Discussion

36.	Anaqueous solution of 2% non-volatile solute exerts a pressure of 1.004bar at the normal boiling point of the solvent. What is the molarmass of the solute?
Answer» An aqueous solution of 2% non-volatile solute exerts a pressure of 1.004 bar at the normal boiling point of the solvent. What is the molar mass of the solute?

Discussion

37.	43. Methane reacts with oxygen to produce carbon dioxide and water. a) Find out the mole reaction between reactants and products. b) Volume relation at STP between reactants and products. c) Mass relation between reactants and products.
Answer» 43. Methane reacts with oxygen to produce carbon dioxide and water. a) Find out the mole reaction between reactants and products. b) Volume relation at STP between reactants and products. c) Mass relation between reactants and products.

Discussion

38.	Using IUPAC norms write the formulae of the following: (i) Tetrahydroxozincate (II) (ii) Potassium tetrachloropalladate (II) (iii) Diamminedichlorido platinum (II) (iv) Potassium tetracyanonickelate (II) (v) Pentaamminenitro-O-cobalt (III) (vi) Hexaamminecobalt (III) sulphate (vii) Potassiumtri(oxalato) chromate (III) (viii) Hexaammineplatinum (IV) (ix) Tetrabromidocuprate (II) (x) Pentaamminenitrito-N-cobalt (III)
Answer» Using IUPAC norms write the formulae of the following: (i) Tetrahydroxozincate (II) (ii) Potassium tetrachloropalladate (II) (iii) Diamminedichlorido platinum (II) (iv) Potassium tetracyanonickelate (II) (v) Pentaamminenitro-O-cobalt (III) (vi) Hexaamminecobalt (III) sulphate (vii) Potassiumtri(oxalato) chromate (III) (viii) Hexaammineplatinum (IV) (ix) Tetrabromidocuprate (II) (x) Pentaamminenitrito-N-cobalt (III)

38.

Using IUPAC norms write the formulae of the following: (i) Tetrahydroxozincate (II) (ii) Potassium tetrachloropalladate (II) (iii) Diamminedichlorido platinum (II) (iv) Potassium tetracyanonickelate (II) (v) Pentaamminenitro-O-cobalt (III) (vi) Hexaamminecobalt (III) sulphate (vii) Potassiumtri(oxalato) chromate (III) (viii) Hexaammineplatinum (IV) (ix) Tetrabromidocuprate (II) (x) Pentaamminenitrito-N-cobalt (III)

Answer»

Using IUPAC norms write the formulae of the following:
(i) Tetrahydroxozincate (II)

(ii) Potassium tetrachloropalladate (II)

(iii) Diamminedichlorido platinum (II)

(iv) Potassium tetracyanonickelate (II)

(v) Pentaamminenitro-O-cobalt (III)

(vi) Hexaamminecobalt (III) sulphate

(vii) Potassiumtri(oxalato) chromate (III)

(viii) Hexaammineplatinum (IV)

(ix) Tetrabromidocuprate (II)

(x) Pentaamminenitrito-N-cobalt (III)

Discussion

39.	13.As2S3 sol is a positive, negative or neutral colloid?(or All of these)
Answer» 13.As2S3 sol is a positive, negative or neutral colloid?(or All of these)

Discussion

40.	93.An alpha particle and a proton have same velocity when they enter perpendicularly to a uniform magnetic field. The period of rotation of proton will be ? (1) Double that of alpha particle (2) Four times that of alpha particle (3) One half times the alpha particle (4) Same as that of alpha particle
Answer» 93.An alpha particle and a proton have same velocity when they enter perpendicularly to a uniform magnetic field. The period of rotation of proton will be ? (1) Double that of alpha particle (2) Four times that of alpha particle (3) One half times the alpha particle (4) Same as that of alpha particle

Discussion

41.	Why ionic solids dissolve in water
Answer» Why ionic solids dissolve in water

Discussion

42.	0.1 M weak acid HA (pH = 3) is titrated with 0.05 M NaOH solution. Calculate the pH (approx.) when 25% of acid has been neutralised. (\log 3 = 0.48)
Answer» 0.1 M weak acid HA (pH = 3) is titrated with 0.05 M NaOH solution. Calculate the pH (approx.) when 25% of acid has been neutralised. (\log 3 = 0.48)

Discussion

43.	Explain self and cross aldol condensation
Answer» Explain self and cross aldol condensation

Discussion

44.	Consider a prototypical fullerene, C60. Let, a = number of 5-membred rings b = number of 6-membered rings c = number of π bonds in C60 Find the value of (3a – 2b + c). Report your answer after dividing it by 13.___
Answer» Consider a prototypical fullerene, $C_{60} .$ Let, a = number of 5-membred rings b = number of 6-membered rings c = number of $π$ bonds in $C_{60}$ Find the value of (3a – 2b + c). Report your answer after dividing it by 13.___

Discussion

45.	When the hybridization state of carbon atom changes from sp3 to sp2 and finally to sp, the angle between the hybridized orbitals:
Answer» When the hybridization state of carbon atom changes from $s p^{3}$ to $s p^{2}$ and finally to $s p$ , the angle between the hybridized orbitals:

Discussion

46.	Why does C2 molecule have 2 pi bonds and no sigma bonds
Answer» Why does C2 molecule have 2 pi bonds and no sigma bonds

Discussion

47.	One litre of CO_2 is passed through red hot coke.The volume becomes 1.4 litres at sametemperature and pressure. The composition ofproducts is
Answer» One litre of CO_2 is passed through red hot coke.The volume becomes 1.4 litres at sametemperature and pressure. The composition ofproducts is

Discussion

48.	The wavelength of characteristic X - Ray Kα Line emitted from zinc (Z=30) is λ, find the wavelength of Kα Line emitted from Molybendum (Z=42).
Answer» The wavelength of characteristic X - Ray $K_{α}$ Line emitted from zinc (Z=30) is $λ$ , find the wavelength of $K_{α}$ Line emitted from Molybendum (Z=42).

Discussion

49.	On the addition of 1 ml. of 10% solution of sodium chloride to 10 ml. of gold sol in presence of 0.025 g of starch, the coagulation is just prevented. The gold number of starch is
Answer» On the addition of 1 ml. of 10% solution of sodium chloride to 10 ml. of gold sol in presence of 0.025 g of starch, the coagulation is just prevented. The gold number of starch is

Discussion

50.	The silver metal crystallizes with a face-centred cubic lattice. The edge length of the unit cell is 4.08 oA. Calculate the percentage of empty space in the FCC structure?
Answer» The silver metal crystallizes with a face-centred cubic lattice. The edge length of the unit cell is $4.08 o A$ . Calculate the percentage of empty space in the FCC structure?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If i0,irms and imean are the values of peak, rms and mean currents of a.c, then

An aromatic amine (A) was treated with alcoholic potash and another compound (Y) when a foul smelling gas was formed with formula C6H5NC. (Y) was formed upon reaction of a compound (Z) with Cl2 in the presence of slaked lime. Identify compound (Z) from the following options.

A hydrocarbon `x' decolourises bromine water. On hydrogenation `x' gives 2-methyl butane. On ozonalysis it gives acetone and acetaldehyde as the products. The hydrocarbon `x' is

What weight of CaCO3 must be decomposed to produce a sufficient quantity of carbon dioxide to convert 21.2 g of Na2CO3 completely into NaHCO3. (Molar mass of Na=23 g/mol,Ca=40 g/mol):CaCO3→CaO+CO2 Na2CO3+CO2+H2O→2NaHCO3

Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseoushydrocarbon containing less than four carbon atoms. (A) is:

11.The PV-graph for a monoatomic gas is shown in the figure. Find the energy absorbed by the gas during this process.

The number of particles crossing per unit area perpendicular to Z axis per unit time is given by N=-D{N2-N1}/ {Z2-Z1} , where N2 and N1 are the number of particles per unit volume at Z2 and Z1 respectively. What is the dimensional formula for D?

Sodium oxalate on heating with conc. H2SO4 gives

1 kg of a gas does 20 kJ of work and receives 16 kJ of heat when it is expanded between two states. A second kind of expansion can be found between the initial and final state which requires a heat input of 9 kJ. The work done by the gas in the second expansion is

What is the acid where replacable atom is 2

Question 12(b)A milkman adds a very small amount of baking soda to fresh milk.(b) Why does this milk take a long time to set as curd?

What is muonic hydrogen atom? How to calculate its ionization enthalpy

Does a FCC Tetragonal unit cell exist?

The polymer of ethene is known as

Which of the following molecules has three-fold axis of symmetry[UPSEAT 2004]

Which of the following has high heat of hydrogenation? a.but-2-ene b.2-methylprop-1-ene c.2,2-dimethylbut-2-ene d.2-methylbut-2-ene

What is spectrochemical series? Explain the difference between a weak field ligand and a strong field ligand.

But 1 yne and but 1 ene can be chemically distinguished by

38. how pai is irational derive

what is polyspermy

A meter-scale is made of copper and iron rods as shown in the figure. If the length of copper rod is λ meter and the coefficients of linear expansion of copper and iron are α1 and α2 respectively, then the equivalent coefficient of linear expansion of the combined material of the meter-scale is

Calculate the heat of formation of acetic acid from the following data.CH3COOH(l) + 2O2(g) →2CO2(g) + 2H2O(l), △H= −207.9 K calC(s) + O2(g)→CO2(g) △H = −94.48 K calH2(g) + 12O2(g)→H2O(l) △ H = −68.4 K cal

34 Oxidation no. Of cr in [Cr(NO)(NH3)2]cl2br

What is the dimension formula of epcilon ?

Electronic configuration of Pd (Z=46) is (1) (Kr) 4d^85s^2 (2) (Kr) 4d^9 5s^1 (3) (Kr) 4d^{10}5s^0 (4) 4d^75s^1

how much chlorine can be absorbed by 1g activated chlorine

Calculate the radius of tetrahedral void present in the unit cell of an atom X which crystallizes in fcc unit cell having an edge length a=50√2 pm

Which of the following will liberate H2 when reacting with NaOH?

17. The volume of H2 gas produced at STP in lane's process by 10g Fe (44./. Impure ) is

24. In which of the following pairs hydrogen bonding is not possible and why ? A NH3, NH3 B NH3, CH4 C H2O, CH3OCH3 D CH3OH, CH3OCH3

which among CH4,CO2,H2O,SF6 have bond angle nearly 90degree

Is burning of natural gas a combination reaction

63 Propyl benzene reacts with bromine in presence of light to give the major product X. What is X?

The radius of H-atom is supposed to be 0.53 Angstrom. Assuming that atom is spherical, the weight of hydrogen atom is (density of hydrogen atom = 2.675 g/cm^3)

For reaction: A + B → Products, the rate if the reaction at various concentration are given below:Expt. No.(A)(B)Rate10.20.2220.20.4430.60.436

Anaqueous solution of 2% non-volatile solute exerts a pressure of 1.004bar at the normal boiling point of the solvent. What is the molarmass of the solute?

43. Methane reacts with oxygen to produce carbon dioxide and water. a) Find out the mole reaction between reactants and products. b) Volume relation at STP between reactants and products. c) Mass relation between reactants and products.

13.As2S3 sol is a positive, negative or neutral colloid?(or All of these)

Why ionic solids dissolve in water

0.1 M weak acid HA (pH = 3) is titrated with 0.05 M NaOH solution. Calculate the pH (approx.) when 25% of acid has been neutralised. (\log 3 = 0.48)

Explain self and cross aldol condensation

Consider a prototypical fullerene, C60. Let, a = number of 5-membred rings b = number of 6-membered rings c = number of π bonds in C60 Find the value of (3a – 2b + c). Report your answer after dividing it by 13.___

When the hybridization state of carbon atom changes from sp3 to sp2 and finally to sp, the angle between the hybridized orbitals:

Why does C2 molecule have 2 pi bonds and no sigma bonds

One litre of CO_2 is passed through red hot coke.The volume becomes 1.4 litres at sametemperature and pressure. The composition ofproducts is

The wavelength of characteristic X - Ray Kα Line emitted from zinc (Z=30) is λ, find the wavelength of Kα Line emitted from Molybendum (Z=42).

On the addition of 1 ml. of 10% solution of sodium chloride to 10 ml. of gold sol in presence of 0.025 g of starch, the coagulation is just prevented. The gold number of starch is

The silver metal crystallizes with a face-centred cubic lattice. The edge length of the unit cell is 4.08 oA. Calculate the percentage of empty space in the FCC structure?