46295 + Interview Questions in Chemistry

1.	full form of par sec
Answer» full form of par sec

Discussion

2.	Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?
Answer» Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

Discussion

3.	Considering complete ionization, Van't Hoff factor of Ca(NO3)2 is:
Answer» Considering complete ionization, Van't Hoff factor of Ca(NO₃)₂is:

Discussion

4.	(\0.0036\) moles of (\CrCl_3. 6H_2O\) were passed through cation exchange resin and the solution of acid coming out of it requried (\28.8 ~ml ~0.375~ M~ NaOH\). Then formula of the complex is (\[Cr(H_2O)_wCl_x]Cl_y. zH_2O\). Then find the value of w+x+zy is
Answer» (\0.0036\) moles of (\CrCl_3. 6H_2O\) were passed through cation exchange resin and the solution of acid coming out of it requried (\28.8 ~ml ~0.375~ M~ NaOH\). Then formula of the complex is (\[Cr(H_2O)_wCl_x]Cl_y. zH_2O\). Then find the value of $\frac{w + x + z}{y}$ is

Discussion

5.	If the ionization enthalpy and electron gain enthalpy of an element are 275 Kcal/mole and 86 Kcal mol−1 respectively, then the electro negativity of the element on mulliken scale is
Answer» If the ionization enthalpy and electron gain enthalpy of an element are 275 Kcal/mole and 86 Kcal ${m o l}^{- 1}$ respectively, then the electro negativity of the element on mulliken scale is

Discussion

6.	If 50 mL of 0.1 M Ca(OH)2 solution is required to neutralize 25 mL of H3PO4 solution then what will be the strength of H3PO4 in g/L ?
Answer» If $50 m L$ of $0.1 M C a (O H)_{2}$ solution is required to neutralize $25 m L$ of $H_{3} P O_{4}$ solution then what will be the strength of $H_{3} P O_{4}$ in $g / L$ ?

Discussion

7.	Undercertain circumstances, a nucleus can decay by emitting a particlemore massive than an α-particle. Consider the following decayprocesses:Calculatethe Q-valuesfor these decays and determine that both are energetically allowed.
Answer» Under certain circumstances, a nucleus can decay by emitting a particle more massive than an α-particle. Consider the following decay processes: Calculate the Q-values for these decays and determine that both are energetically allowed.

7.

Undercertain circumstances, a nucleus can decay by emitting a particlemore massive than an α-particle. Consider the following decayprocesses:Calculatethe Q-valuesfor these decays and determine that both are energetically allowed.

Answer»

Under
certain circumstances, a nucleus can decay by emitting a particle
more massive than an α-particle. Consider the following decay
processes:

Calculate
the Q-values
for these decays and determine that both are energetically allowed.

Discussion

8.	Which of the following compound is not coloured ?
Answer» Which of the following compound is not coloured ?

Discussion

9.	The resistance and conductivity of 0.02 M KCl solution are 82.4 ohm and 0.002768Scm−1, respectively. When filled with 0.005NK2SO4, the solution had a resistance of 324 ohm. Calculate equivalent conductivity of K2SO4 solution.
Answer» The resistance and conductivity of 0.02 M KCl solution are 82.4 ohm and $0.002768 S c m^{- 1}$ , respectively. When filled with $0.005 N K_{2} S O_{4}$ , the solution had a resistance of 324 ohm. Calculate equivalent conductivity of $K_{2} S O_{4}$ solution.

Discussion

10.	What is the meaning of derived quantities?
Answer» What is the meaning of derived quantities?

Discussion

11.	Which of the following fluoro-compounds is most likely to behave as a Lewis base ?
Answer» Which of the following fluoro-compounds is most likely to behave as a Lewis base ?

Discussion

12.	Which of the following is the most reactive alkyl halide for a SN1 reaction?
Answer» Which of the following is the most reactive alkyl halide for a $S_{N} 1$ reaction?

Discussion

13.	Calculate the boiling point of solutions when 2 g of Na2SO4 (M=142g mol−1) is dissolved in 50 g of water, assuming Na2SO4 undergoes complete ionization. ( Kb for water = 0.52 K kg mol−1 )
Answer» Calculate the boiling point of solutions when 2 g of $N a_{2} S O_{4} (M = 142 g m o l^{- 1})$ is dissolved in 50 g of water, assuming $N a_{2} S O_{4}$ undergoes complete ionization. ( $K_{b}$ for water = 0.52 K kg $m o l^{- 1}$ )

Discussion

14.	Zinc, Cadmium and mercury shows the property of
Answer» Zinc, Cadmium and mercury shows the property of

Discussion

15.	36. A mixture of 1.65 10power21 molecule of X and 1.85 10power21 molecule of Y weight 0.688g .T he mol . wt.of X is ( mol.wt.nof Y is 187
Answer» 36. A mixture of 1.65 10power21 molecule of X and 1.85 10power21 molecule of Y weight 0.688g .T he mol . wt.of X is ( mol.wt.nof Y is 187

Discussion

16.	. The amine that reacts with Hinsberg's reagent to give an alkali insoluble product?
Answer» . The amine that reacts with Hinsberg's reagent to give an alkali insoluble product?

Discussion

17.	A refrigerator based on ideal vapour compression cycle operates between the temperature limits of −20∘C and 40∘C. The refrigerant enters the condenser as saturated vapour and leaves as saturated liquid. The enthalpy and entropy values for saturated liquid and vapour at these temperatures are given in table below.Thfhgsfsg(∘C)(kJ/kg)(kJ/kg)(kJ/kg K)(kJ/kg K)−20201800.070.736640802000.30.67If refrigerant circulation rate is 0.025 kg/s, the refrigeration effect is equal to
Answer» A refrigerator based on ideal vapour compression cycle operates between the temperature limits of $- 20^{\circ} C$ and $40^{\circ} C$ . The refrigerant enters the condenser as saturated vapour and leaves as saturated liquid. The enthalpy and entropy values for saturated liquid and vapour at these temperatures are given in table below. $\begin{matrix} T & h_{f} & h_{g} & s_{f} & s_{g} (^{\circ} C) & (k J / k g) & (k J / k g) & (k J / k g K) & (k J / k g K) - 20 & 20 & 180 & 0.07 & 0.7366 40 & 80 & 200 & 0.3 & 0.67 \end{matrix}$ If refrigerant circulation rate is $0.025 k g / s$ , the refrigeration effect is equal to

Discussion

18.	24 The rate constant k1 and k2 for two different reactions are 1016 e-2000/T and 1015 e -1000/T respectively . the temperature at which k1 =k2
Answer» 24 The rate constant k1 and k2 for two different reactions are 1016 e-2000/T and 1015 e -1000/T respectively . the temperature at which k1 =k2

Discussion

19.	Which of the following sets of quantum numbers is not possible?Options:n = 3, l = 2, m = 0, s = –1/2Should have chosen n = 4, l = 4, m = +3, s = +1/2Wrong n = 3, l = 1, m = –2, s = –1/2n = 2, l = 0, m = 0, s = +1/2
Answer» Which of the following sets of quantum numbers is not possible? Options: n = 3, l = 2, m = 0, s = –1/2 Should have chosen n = 4, l = 4, m = +3, s = +1/2 Wrong n = 3, l = 1, m = –2, s = –1/2 n = 2, l = 0, m = 0, s = +1/2

Discussion

20.	38. Explain the resonance structure of CO2 molecule.
Answer» 38. Explain the resonance structure of CO2 molecule.

Discussion

21.	Degrees of freedom for monoatomic, diatomic and triatomic gas molecule? And for free triatomic and rigid triatomic what is DOF?
Answer» Degrees of freedom for monoatomic, diatomic and triatomic gas molecule? And for free triatomic and rigid triatomic what is DOF?

Discussion

22.	The free energy change of a reversible reaction at equilibrium is
Answer» The free energy change of a reversible reaction at equilibrium is

Discussion

23.	HCl is added to the following oxides. Which will give H2O2?
Answer» HCl is added to the following oxides. Which will give $H_{2} O_{2}$ ?

Discussion

24.	the colloidal sol of As2S3 prefers to adsorb- A - nitrate ion B - potassium ion C- sulphide ion D- hydrogen ion
Answer» the colloidal sol of As2S3 prefers to adsorb- A - nitrate ion B - potassium ion C- sulphide ion D- hydrogen ion

Discussion

25.	The standard reduction potential of Cu2+/Cu and Cu2+/Cu+ are 0.337 and 0.153 V respectively. The standard electrode potential of Cu+/Cu half cell is:
Answer» The standard reduction potential of $C u^{2 +} / C u$ and $C u^{2 +} / C u^{+}$ are $0.337$ and $0.153 V$ respectively. The standard electrode potential of $C u^{+} / C u$ half cell is:

Discussion

26.	In the manufacture of caustic soda by Castner kellner process, the by - products formed are
Answer» In the manufacture of caustic soda by Castner kellner process, the by - products formed are

Discussion

27.	11.The osmotic pressure of a solution incres if the (1) Number of dilute molecule is increased (2) Temperature is decreased (3) volume is increased (4) value of R is increased
Answer» 11.The osmotic pressure of a solution incres if the (1) Number of dilute molecule is increased (2) Temperature is decreased (3) volume is increased (4) value of R is increased

Discussion

28.	An organic compound having structure as given below:How many of the below given reactions will it give?1. Ceric ammonium nitrate testII. Brisk effervescence with sodium bicarbonateIII. Characteristic colouration with neutral ferric chloride after decarboxylation and reduction by Clemmenson's methodIV. Fehling's testV. Tollen's testVI. Orange dye with benzene diazonium chlorideVII. Molisch test
Answer» An organic compound having structure as given below: How many of the below given reactions will it give? 1. Ceric ammonium nitrate test II. Brisk effervescence with sodium bicarbonate III. Characteristic colouration with neutral ferric chloride after decarboxylation and reduction by Clemmenson's method IV. Fehling's test V. Tollen's test VI. Orange dye with benzene diazonium chloride VII. Molisch test

Discussion

29.	The molar enthalpy of vaporisation of acetone is less than that of water. Why?
Answer» The molar enthalpy of vaporisation of acetone is less than that of water. Why?

Discussion

30.	The complex ions [fe(cn)6]3- and [fe(cn)6]4- are having which configuration and which magnetic nature
Answer» The complex ions [fe(cn)6]3- and [fe(cn)6]4- are having which configuration and which magnetic nature

Discussion

31.	Is Mass and weight is same in terms of chemistry??
Answer» Is Mass and weight is same in terms of chemistry??

Discussion

32.	Product (B) is :
Answer» Product (B) is :

Discussion

33.	HCl of juice converts Fe3+ Fe2+.How?SincerelyHarshiv Ganwani
Answer» HCl of juice converts Fe3+ Fe2+. How? Sincerely Harshiv Ganwani

Discussion

34.	45. Order of solubility of group 1 halides.
Answer» 45. Order of solubility of group 1 halides.

Discussion

35.	42. How to calculate the moles
Answer» 42. How to calculate the moles

Discussion

36.	For the dissociation reaction, N2O4⇌2NO2(g), the equilibrium constant Kp is 0.120 atm at 298 K and total pressure of system is 2 atm. Calculate the degree of dissociation of N2O4.
Answer» For the dissociation reaction, $N_{2} O_{4} ⇌ 2 N O_{2} (g)$ , the equilibrium constant $K_{p}$ is 0.120 atm at 298 K and total pressure of system is 2 atm. Calculate the degree of dissociation of $N_{2} O_{4}$ .

Discussion

37.	Strong nuclear force is not equal to electromagnetic force in nucleus then how nucleus is stable
Answer» Strong nuclear force is not equal to electromagnetic force in nucleus then how nucleus is stable

Discussion

38.	0.3780 g of an organic chloro compound gave 0.5740 g of silver chloride in Carius estimation. Calculate the percentage of chlorine present in the compound.
Answer» 0.3780 g of an organic chloro compound gave 0.5740 g of silver chloride in Carius estimation. Calculate the percentage of chlorine present in the compound.

Discussion

39.	Complete reaction of 2.0 g of calcium (at. wt. = 40) with excess HCL produces 1.125 L of H2 gas. Complete reaction of the same quantity of another metal "M" with excess HCL produces 1.85 L of H2 gas under identical conditions. The equivalent weight of "M" is closest to
Answer» Complete reaction of 2.0 g of calcium (at. wt. = 40) with excess HCL produces 1.125 L of $H_{2}$ gas. Complete reaction of the same quantity of another metal "M" with excess HCL produces 1.85 L of $H_{2}$ gas under identical conditions. The equivalent weight of "M" is closest to

Discussion

40.	51.What will be the ratio of the rms velocities of the molecules of two gases A and B if their vapour densities are in the ratio 9 : 16
Answer» 51.What will be the ratio of the rms velocities of the molecules of two gases A and B if their vapour densities are in the ratio 9 : 16

Discussion

41.	37. A reaction is found to have a rate constant x/sec by what factor the rate is increased if initial concentration of A is tripled a) 3 b)9 c) x d) remains same
Answer» 37. A reaction is found to have a rate constant x/sec by what factor the rate is increased if initial concentration of A is tripled a) 3 b)9 c) x d) remains same

Discussion

42.	The increasing order of the reactivity of the following compund in nucleophilic addition reaction is : Propanal, Benzaldehyde, Propanone, Butanone
Answer» The increasing order of the reactivity of the following compund in nucleophilic addition reaction is : Propanal, Benzaldehyde, Propanone, Butanone

Discussion

43.	Colloidal solution is prepared by following reaction AgNO3 (excess )+KI→AgI↓+KNO3. The most effective electrolyte in the coagulation of this colloidal solution is:
Answer» Colloidal solution is prepared by following reaction $A g N O_{3} (excess) + K I \to A g I ↓ + K N O_{3} .$ The most effective electrolyte in the coagulation of this colloidal solution is:

Discussion

44.	Write the IUPAC name of the following compound C(OH)_2=COH-CH=C(OH)_2
Answer» Write the IUPAC name of the following compound C(OH)_2=COH-CH=C(OH)_2

Discussion

45.	If a,b,c are in H.P,then prove that 2/b=1/(b-a)+1/(b-c)
Answer» If a,b,c are in H.P,then prove that 2/b=1/(b-a)+1/(b-c)

Discussion

46.	33.If an ideal solution is made by mixing 2 moles of benezene (p0 =266 mm Hg ) and 3 moles of another liquid (p0 =236 mm Hg). The total vapour pressure of the solution at the same temperature would be?
Answer» 33.If an ideal solution is made by mixing 2 moles of benezene (p0 =266 mm Hg ) and 3 moles of another liquid (p0 =236 mm Hg). The total vapour pressure of the solution at the same temperature would be?

Discussion

47.	The incorrect electron dot structure for the formation of magnesium chloride areमैग्नीशियम क्लोराइड के निर्माण के लिए गलत इलेक्ट्रॉन बिन्दु संरचना है
Answer» The incorrect electron dot structure for the formation of magnesium chloride are मैग्नीशियम क्लोराइड के निर्माण के लिए गलत इलेक्ट्रॉन बिन्दु संरचना है

Discussion

48.	What is the overall stability of carbanion? Why is phenyl carbanion less stable than cyclopropene carbanion? Are they both resonating?
Answer» What is the overall stability of carbanion? Why is phenyl carbanion less stable than cyclopropene carbanion? Are they both resonating?

Discussion

49.	Which of the following is not an ore of Zinc?
Answer» Which of the following is not an ore of Zinc?

Discussion

50.	Which of the following amine will give the carbylamine test?
Answer» Which of the following amine will give the carbylamine test?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

full form of par sec

Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

Considering complete ionization, Van't Hoff factor of Ca(NO3)2 is:

(\0.0036\) moles of (\CrCl_3. 6H_2O\) were passed through cation exchange resin and the solution of acid coming out of it requried (\28.8 ~ml ~0.375~ M~ NaOH\). Then formula of the complex is (\[Cr(H_2O)_wCl_x]Cl_y. zH_2O\). Then find the value of w+x+zy is

If the ionization enthalpy and electron gain enthalpy of an element are 275 Kcal/mole and 86 Kcal mol−1 respectively, then the electro negativity of the element on mulliken scale is

If 50 mL of 0.1 M Ca(OH)2 solution is required to neutralize 25 mL of H3PO4 solution then what will be the strength of H3PO4 in g/L ?

Undercertain circumstances, a nucleus can decay by emitting a particlemore massive than an α-particle. Consider the following decayprocesses:Calculatethe Q-valuesfor these decays and determine that both are energetically allowed.

Which of the following compound is not coloured ?

The resistance and conductivity of 0.02 M KCl solution are 82.4 ohm and 0.002768Scm−1, respectively. When filled with 0.005NK2SO4, the solution had a resistance of 324 ohm. Calculate equivalent conductivity of K2SO4 solution.

What is the meaning of derived quantities?

Which of the following fluoro-compounds is most likely to behave as a Lewis base ?

Which of the following is the most reactive alkyl halide for a SN1 reaction?

Calculate the boiling point of solutions when 2 g of Na2SO4 (M=142g mol−1) is dissolved in 50 g of water, assuming Na2SO4 undergoes complete ionization. ( Kb for water = 0.52 K kg mol−1 )

Zinc, Cadmium and mercury shows the property of

36. A mixture of 1.65 10power21 molecule of X and 1.85 10power21 molecule of Y weight 0.688g .T he mol . wt.of X is ( mol.wt.nof Y is 187

. The amine that reacts with Hinsberg's reagent to give an alkali insoluble product?

24 The rate constant k1 and k2 for two different reactions are 10*16 e*-2000/T and 10*15 e *-1000/T respectively . the temperature at which k1 =k2

Which of the following sets of quantum numbers is not possible?Options:n = 3, l = 2, m = 0, s = –1/2Should have chosen n = 4, l = 4, m = +3, s = +1/2Wrong n = 3, l = 1, m = –2, s = –1/2n = 2, l = 0, m = 0, s = +1/2

38. Explain the resonance structure of CO2 molecule.

Degrees of freedom for monoatomic, diatomic and triatomic gas molecule? And for free triatomic and rigid triatomic what is DOF?

The free energy change of a reversible reaction at equilibrium is

HCl is added to the following oxides. Which will give H2O2?

the colloidal sol of As2S3 prefers to adsorb- A - nitrate ion B - potassium ion C- sulphide ion D- hydrogen ion

The standard reduction potential of Cu2+/Cu and Cu2+/Cu+ are 0.337 and 0.153 V respectively. The standard electrode potential of Cu+/Cu half cell is:

In the manufacture of caustic soda by Castner kellner process, the by - products formed are

11.The osmotic pressure of a solution incres if the (1) Number of dilute molecule is increased (2) Temperature is decreased (3) volume is increased (4) value of R is increased

The molar enthalpy of vaporisation of acetone is less than that of water. Why?

The complex ions [fe(cn)6]3- and [fe(cn)6]4- are having which configuration and which magnetic nature

Is Mass and weight is same in terms of chemistry??

Product (B) is :

HCl of juice converts Fe3+ Fe2+.How?SincerelyHarshiv Ganwani

45. Order of solubility of group 1 halides.

42. How to calculate the moles

For the dissociation reaction, N2O4⇌2NO2(g), the equilibrium constant Kp is 0.120 atm at 298 K and total pressure of system is 2 atm. Calculate the degree of dissociation of N2O4.

Strong nuclear force is not equal to electromagnetic force in nucleus then how nucleus is stable

0.3780 g of an organic chloro compound gave 0.5740 g of silver chloride in Carius estimation. Calculate the percentage of chlorine present in the compound.

Complete reaction of 2.0 g of calcium (at. wt. = 40) with excess HCL produces 1.125 L of H2 gas. Complete reaction of the same quantity of another metal "M" with excess HCL produces 1.85 L of H2 gas under identical conditions. The equivalent weight of "M" is closest to

51.What will be the ratio of the rms velocities of the molecules of two gases A and B if their vapour densities are in the ratio 9 : 16

37. A reaction is found to have a rate constant x/sec by what factor the rate is increased if initial concentration of A is tripled a) 3 b)9 c) x d) remains same

The increasing order of the reactivity of the following compund in nucleophilic addition reaction is : Propanal, Benzaldehyde, Propanone, Butanone

Colloidal solution is prepared by following reaction AgNO3 (excess )+KI→AgI↓+KNO3. The most effective electrolyte in the coagulation of this colloidal solution is:

Write the IUPAC name of the following compound C(OH)_2=COH-CH=C(OH)_2

If a,b,c are in H.P,then prove that 2/b=1/(b-a)+1/(b-c)

33.If an ideal solution is made by mixing 2 moles of benezene (p0 =266 mm Hg ) and 3 moles of another liquid (p0 =236 mm Hg). The total vapour pressure of the solution at the same temperature would be?

The incorrect electron dot structure for the formation of magnesium chloride areमैग्नीशियम क्लोराइड के निर्माण के लिए गलत इलेक्ट्रॉन बिन्दु संरचना है

What is the overall stability of carbanion? Why is phenyl carbanion less stable than cyclopropene carbanion? Are they both resonating?

Which of the following is not an ore of Zinc?

Which of the following amine will give the carbylamine test?

24 The rate constant k1 and k2 for two different reactions are 1016 e-2000/T and 1015 e -1000/T respectively . the temperature at which k1 =k2