46295 + Interview Questions in Chemistry

1.	The reaction, CO(g)+3H2(g)⇌CH4(g)+H2O(g) is at equilibrium at 1300 K in a one litre flask. The gaseous equilibrium mixture contains 0.30 mol of CO, 0.10 mol of H2, 0.020 mol of H2O and an unknown amount of CH4 in the flask. Determine the concentration of CH4 in the mixture. The equilibrium constant, Kc, for the reaction at the given temperature is 3.90.
Answer» The reaction, $C O (g) + 3 H_{2} (g) ⇌ C H_{4} (g) + H_{2} O (g)$ is at equilibrium at $1300 K$ in a one litre flask. The gaseous equilibrium mixture contains $0.30 m o l$ of $C O, 0.10 m o l$ of $H_{2}, 0.020 m o l$ of $H_{2} O$ and an unknown amount of $C H_{4}$ in the flask. Determine the concentration of $C H_{4}$ in the mixture. The equilibrium constant, $K_{c}$ , for the reaction at the given temperature is $3.90$ .

Discussion

2.	Why Fe has highest binding energy and the binding energy curve become saturated?
Answer» Why Fe has highest binding energy and the binding energy curve become saturated?

Discussion

3.	Question 7Why was carbon-12 preferred over oxygen-16 to be chosen as the standard reference for measuring atomic masses?
Answer» Question 7 Why was carbon-12 preferred over oxygen-16 to be chosen as the standard reference for measuring atomic masses?

3.

Question 7Why was carbon-12 preferred over oxygen-16 to be chosen as the standard reference for measuring atomic masses?

Answer»

Question 7

Why was carbon-12 preferred over oxygen-16 to be chosen as the standard reference for measuring atomic masses?

Discussion

4.	The major product obtained when this substrate is subjected to E1 reaction
Answer» The major product obtained when this substrate is subjected to $E 1$ reaction

Discussion

5.	A man observed a coin placed at the bottom of a beaker which contains two immiscible liquids of refractive indices 1.2 and 1.4 as shown in the figure. Find the depth of the coin below the surface, as observed from above. ___
Answer» A man observed a coin placed at the bottom of a beaker which contains two immiscible liquids of refractive indices 1.2 and 1.4 as shown in the figure. Find the depth of the coin below the surface, as observed from above. ___

Discussion

6.	33. How to find z in solving numerical of density
Answer» 33. How to find z in solving numerical of density

Discussion

7.	In a ccp crystal lattice, the edge length of the unit cell is 80 pm. Find the distance of tetrahedral void from the corner of a cube.
Answer» In a ccp crystal lattice, the edge length of the unit cell is $80 p m$ . Find the distance of tetrahedral void from the corner of a cube.

Discussion

8.	For the combustion of 1 mole of liquid benzene at 25oC, the heat of reaction at constant pressure is given by C6H6(l)+712O2(g)→6CO2(g)+3H2O(l); △U=−780980 calWhat would be the heat of reaction at constant volume?
Answer» For the combustion of 1 mole of liquid benzene at $25^{o} C,$ the heat of reaction at constant pressure is given by $C_{6} H_{6} (l) + 7 \frac{1}{2} O_{2} (g) \to 6 C O_{2} (g) + 3 H_{2} O (l); △ U = - 780980 c a l$ What would be the heat of reaction at constant volume?

Discussion

9.	van't Hoff factor for aqueous Na2SO4 solution with degree of ionisation α = 0.75, is
Answer» van't Hoff factor for aqueous Na2SO4 solution with degree of ionisation α = 0.75, is

Discussion

10.	Which of the following is a pure substanceA) diamond B) CuSO4.5H20 C) Both AandB
Answer» Which of the following is a pure substance A) diamond B) CuSO4.5H20 C) Both AandB

Discussion

11.	Formula for anhydride of deutero sulphuric acid is
Answer» Formula for anhydride of deutero sulphuric acid is

Discussion

12.	Which of the following is oxidised by KMnO4
Answer» Which of the following is oxidised by $K M n O_{4}$

Discussion

13.	assertion-reason (i) If both assertion and reason are true and reason is correct explanation of assertion. (ii) If both assertion and reason are true both reason is not the correct explanation of assertion. (iii) If assertion is true but reason is false (iv) If both assertion and reason are false. A: total carge on N_A ions of co_3^{2-} is 1.93 ×10^{5 }coulamb R:charge on one electron is 96500 coulamb
Answer» assertion-reason (i) If both assertion and reason are true and reason is correct explanation of assertion. (ii) If both assertion and reason are true both reason is not the correct explanation of assertion. (iii) If assertion is true but reason is false (iv) If both assertion and reason are false. A: total carge on N_A ions of co_3^{2-} is 1.93 ×10^{5 }coulamb R:charge on one electron is 96500 coulamb

Discussion

14.	Glycerol is used [Kurukshetra CET 2002]
Answer» Glycerol is used [Kurukshetra CET 2002]

Discussion

15.	How many of the following combinations will produce H2 gas?(a) Cu metal and concentrated HNO3(b) Au metal and NaCN in the presence of air(c) Zn metal and NaOH(aq)(d) Zn metal and dilute HNO3(e) Solid carbon and steam at high temperature
Answer» How many of the following combinations will produce $H_{2}$ gas? $(a) Cu metal and concentrated H N O_{3} (b) Au metal and NaCN in the presence of air (c) Zn metal and NaOH(aq) (d) Zn metal and dilute H N O_{3} (e) Solid carbon and steam at high temperature$

Discussion

16.	Treatment of cyclopentanone with methyl lithium gives which of the following species?
Answer» Treatment of cyclopentanone with methyl lithium gives which of the following species?

Discussion

17.	In a zero order reaction 20%of the reaction complete in 10s .how much time it will take to complete 50%of the reaction?
Answer» In a zero order reaction 20%of the reaction complete in 10s .how much time it will take to complete 50%of the reaction?

Discussion

18.	Body diagonal of a cube is 866 ppm. Its edge length would be
Answer» Body diagonal of a cube is 866 ppm. Its edge length would be

Discussion

19.	21.How many other major contributing resonance saruures are posible for the following heterocycle? (a)2 (b) 4 (c) 6 (d) 8
Answer» 21.How many other major contributing resonance saruures are posible for the following heterocycle? (a)2 (b) 4 (c) 6 (d) 8

Discussion

20.	Which one of the following statements about H3BO3 is not correct ?
Answer» Which one of the following statements about $H_{3} B O_{3}$ is not correct ?

Discussion

21.	2Na + H2 -------> 2 NaH In the above equation, Na is being oxidised because it looses electron to form Na+ but we can think of the above situation as: Reduction, because Hydrogen is added to Na (addition of H is reduction)
Answer» 2Na + H2 -------> 2 NaH In the above equation, Na is being oxidised because it looses electron to form Na+ but we can think of the above situation as: Reduction, because Hydrogen is added to Na (addition of H is reduction)

Discussion

22.	What is thermodynamics
Answer» What is thermodynamics

Discussion

23.	A gas expands in a piston-cylinder device from V1 to V2, the process being described by P=aV+b, where P: Pressure and V: Volume, the work done in process is –
Answer» A gas expands in a piston-cylinder device from $V_{1}$ to $V_{2}$ , the process being described by $P = \frac{a}{V} + b$ , where P: Pressure and V: Volume, the work done in process is –

Discussion

24.	2. Hydrolysis of NCl3 and PCl3 produces different products , why?
Answer» 2. Hydrolysis of NCl3 and PCl3 produces different products , why?

Discussion

25.	acetaldwhyde \xrightarrow{hcn}X \xrightarrow{h2o/h+} Y \xrightarrow{heat}Z the z is
Answer» acetaldwhyde \xrightarrow{hcn}X \xrightarrow{h2o/h+} Y \xrightarrow{heat}Z the z is

Discussion

26.	Which of the following salt undergoes hydrolysis
Answer» Which of the following salt undergoes hydrolysis

Discussion

27.	Find VA−VB in the given figure ?
Answer» Find $V_{A} - V_{B}$ in the given figure ?

Discussion

28.	How number of relations come 2^(mn)?
Answer» How number of relations come 2^(mn)?

Discussion

29.	22. A p-n photoiodide is made of a material with a aband gap of 2eV. The minimum frequency of the radiation that can be absorbed by the material is nearly??
Answer» 22. A p-n photoiodide is made of a material with a aband gap of 2eV. The minimum frequency of the radiation that can be absorbed by the material is nearly??

Discussion

30.	What is the force experienced by two dipole seperated by a distance r?
Answer» What is the force experienced by two dipole seperated by a distance r?

Discussion

31.	The energy of second Bohr orbit of the hydrogen atomis -328 kJ mol-1; hence the energy of fourth Bohr\lbrack AIPMT (Prelims)-2005\rbrack(2) -1312 kJ mol-1(4) -82 kJ mol-torbit would be(1) -41 kJ mol-1(3)-164 kJ mol-1
Answer» The energy of second Bohr orbit of the hydrogen atomis -328 kJ mol-1; hence the energy of fourth Bohr\lbrack AIPMT (Prelims)-2005\rbrack(2) -1312 kJ mol-1(4) -82 kJ mol-torbit would be(1) -41 kJ mol-1(3)-164 kJ mol-1

Discussion

32.	CH3CH2OH+HClZnCl2−−−−→CH3CH2Cl+H2OIn the above reaction, the leaving group is:
Answer» $C H_{3} C H_{2} O H + H C l Z n C l_{2} - --- \to C H_{3} C H_{2} C l + H_{2} O$ In the above reaction, the leaving group is:

Discussion

33.	7.iupac nomenclature of :- cH3cH2cH(cH3)cooH
Answer» 7.iupac nomenclature of :- cH3cH2cH(cH3)cooH

Discussion

34.	Butan-2-one can be converted to propionic acid by using :
Answer» Butan-2-one can be converted to propionic acid by using :

Discussion

35.	22.How to find structural isomerism of C4H8
Answer» 22.How to find structural isomerism of C4H8

Discussion

36.	A gas occupies volume of 580 mL at 17 oC. It is heated to 100 oC at constant pressure. Calculate the final volume of the gas -
Answer» A gas occupies volume of $580 m L$ at $17^{o} C .$ It is heated to $100^{o} C$ at constant pressure. Calculate the final volume of the gas -

Discussion

37.	In catalytic reduction of hydrocarbon, which catalyst is mostly used
Answer» In catalytic reduction of hydrocarbon, which catalyst is mostly used

Discussion

38.	Which of the following compounds are not hydrolysed?
Answer» Which of the following compounds are not hydrolysed?

Discussion

39.	Convert salicylic acid to phenol.
Answer» Convert salicylic acid to phenol.

Discussion

40.	In the following question a statement of assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) Electron gain enthalpy becomes less negative as we go down a group. Reason. (R) size fo the atom inscreses on going down the group and the added electron would be farther from the nucleus. (a) Assertion and reason both are correct statement but reason is not correct explanation for assertion. (b) assertion and reason both are correct statements and reason is correct explanation for assertion . (c) Assertion and reason both are wrong statements. (d) Assertion is wrong statement but reason is correct statement.
Answer» In the following question a statement of assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) Electron gain enthalpy becomes less negative as we go down a group. Reason. (R) size fo the atom inscreses on going down the group and the added electron would be farther from the nucleus. (a) Assertion and reason both are correct statement but reason is not correct explanation for assertion. (b) assertion and reason both are correct statements and reason is correct explanation for assertion . (c) Assertion and reason both are wrong statements. (d) Assertion is wrong statement but reason is correct statement.

Discussion

41.	If x= 10.0+- 0.1 and y =10.0+-0.1 then find 2x-2y Is equal to.
Answer» If x= 10.0+- 0.1 and y =10.0+-0.1 then find 2x-2y Is equal to.

Discussion

42.	Calculate the conc. of CO3^2- ion in 0.1 M H2CO3 if 1st dissociation is 50% & 2nd is 25%?
Answer» Calculate the conc. of CO3^2- ion in 0.1 M H2CO3 if 1st dissociation is 50% & 2nd is 25%?

Discussion

43.	100 mL of 0.6 Macetic acid is shaken with 2 g activated carbon. The final concentration of the solution after adsorption is 0.5 M. What is the amount of acetic acid in gram adsorbed per gram of carbon
Answer» $100 mL$ of $0.6 M$ acetic acid is shaken with $2 g$ activated carbon. The final concentration of the solution after adsorption is $0.5 M .$ What is the amount of acetic acid in gram adsorbed per gram of carbon

Discussion

44.	The nitrogen oxide(s) that contain(s) N−N bond(s) is/are
Answer» The nitrogen oxide(s) that contain(s) $N - N$ bond(s) is/are

Discussion

45.	Which of the following reaction is not correct?
Answer» Which of the following reaction is not correct?

Discussion

46.	190.0 ml of N2 was collected in a jar over water at some temperature, water level inside and outside the jar standing at the same height. If barometer reads 740 mm Hg and aqueous tenstion at the temperature of the experiment is 20 mm Hg, the volume of the gas at 1 atm pressure and at the same temperature would be ?
Answer» 190.0 ml of $N_{2}$ was collected in a jar over water at some temperature, water level inside and outside the jar standing at the same height. If barometer reads 740 mm Hg and aqueous tenstion at the temperature of the experiment is 20 mm Hg, the volume of the gas at 1 atm pressure and at the same temperature would be ?

Discussion

47.	A solution is 4 ppm by weight of solute. The weight percentage of solute in this concentration is
Answer» A solution is 4 ppm by weight of solute. The weight percentage of solute in this concentration is

Discussion

48.	Name an artificial sweetener which is derivative of sucrose.
Answer» Name an artificial sweetener which is derivative of sucrose.

Discussion

49.	At 143 K, the reaction of XeF4 with O2F2 produces a xenon compound Y. The total number of lone pair(s) of electrons present in 1 molecule of Y is:
Answer» At $143 K$ , the reaction of $X e F_{4}$ with $O_{2} F_{2}$ produces a xenon compound Y. The total number of lone pair(s) of electrons present in $1$ molecule of Y is:

Discussion

50.	24.What is 'partial charge' in covalent or co-ordinate bonding?
Answer» 24.What is 'partial charge' in covalent or co-ordinate bonding?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why Fe has highest binding energy and the binding energy curve become saturated?

Question 7Why was carbon-12 preferred over oxygen-16 to be chosen as the standard reference for measuring atomic masses?

The major product obtained when this substrate is subjected to E1 reaction

A man observed a coin placed at the bottom of a beaker which contains two immiscible liquids of refractive indices 1.2 and 1.4 as shown in the figure. Find the depth of the coin below the surface, as observed from above. ___

33. How to find z in solving numerical of density

In a ccp crystal lattice, the edge length of the unit cell is 80 pm. Find the distance of tetrahedral void from the corner of a cube.

For the combustion of 1 mole of liquid benzene at 25oC, the heat of reaction at constant pressure is given by C6H6(l)+712O2(g)→6CO2(g)+3H2O(l); △U=−780980 calWhat would be the heat of reaction at constant volume?

van't Hoff factor for aqueous Na2SO4 solution with degree of ionisation α = 0.75, is

Which of the following is a pure substanceA) diamond B) CuSO4.5H20 C) Both AandB

Formula for anhydride of deutero sulphuric acid is

Which of the following is oxidised by KMnO4

Glycerol is used [Kurukshetra CET 2002]

How many of the following combinations will produce H2 gas?(a) Cu metal and concentrated HNO3(b) Au metal and NaCN in the presence of air(c) Zn metal and NaOH(aq)(d) Zn metal and dilute HNO3(e) Solid carbon and steam at high temperature

Treatment of cyclopentanone with methyl lithium gives which of the following species?

In a zero order reaction 20%of the reaction complete in 10s .how much time it will take to complete 50%of the reaction?

Body diagonal of a cube is 866 ppm. Its edge length would be

21.How many other major contributing resonance saruures are posible for the following heterocycle? (a)2 (b) 4 (c) 6 (d) 8

Which one of the following statements about H3BO3 is not correct ?

2Na + H2 -------> 2 NaH In the above equation, Na is being oxidised because it looses electron to form Na+ but we can think of the above situation as: Reduction, because Hydrogen is added to Na (addition of H is reduction)

What is thermodynamics

A gas expands in a piston-cylinder device from V1 to V2, the process being described by P=aV+b, where P: Pressure and V: Volume, the work done in process is –

2. Hydrolysis of NCl3 and PCl3 produces different products , why?

acetaldwhyde \xrightarrow{hcn}X \xrightarrow{h2o/h+} Y \xrightarrow{heat}Z the z is

Which of the following salt undergoes hydrolysis

Find VA−VB in the given figure ?

How number of relations come 2^(mn)?

22. A p-n photoiodide is made of a material with a aband gap of 2eV. The minimum frequency of the radiation that can be absorbed by the material is nearly??

What is the force experienced by two dipole seperated by a distance r?

The energy of second Bohr orbit of the hydrogen atomis -328 kJ mol-1; hence the energy of fourth Bohr\lbrack AIPMT (Prelims)-2005\rbrack(2) -1312 kJ mol-1(4) -82 kJ mol-torbit would be(1) -41 kJ mol-1(3)-164 kJ mol-1

CH3CH2OH+HClZnCl2−−−−→CH3CH2Cl+H2OIn the above reaction, the leaving group is:

7.iupac nomenclature of :- cH3cH2cH(cH3)cooH

Butan-2-one can be converted to propionic acid by using :

22.How to find structural isomerism of C4H8

A gas occupies volume of 580 mL at 17 oC. It is heated to 100 oC at constant pressure. Calculate the final volume of the gas -

In catalytic reduction of hydrocarbon, which catalyst is mostly used

Which of the following compounds are not hydrolysed?

Convert salicylic acid to phenol.

If x= 10.0+- 0.1 and y =10.0+-0.1 then find 2x-2y Is equal to.

Calculate the conc. of CO3^2- ion in 0.1 M H2CO3 if 1st dissociation is 50% & 2nd is 25%?

100 mL of 0.6 Macetic acid is shaken with 2 g activated carbon. The final concentration of the solution after adsorption is 0.5 M. What is the amount of acetic acid in gram adsorbed per gram of carbon

The nitrogen oxide(s) that contain(s) N−N bond(s) is/are

Which of the following reaction is not correct?

A solution is 4 ppm by weight of solute. The weight percentage of solute in this concentration is

Name an artificial sweetener which is derivative of sucrose.

At 143 K, the reaction of XeF4 with O2F2 produces a xenon compound Y. The total number of lone pair(s) of electrons present in 1 molecule of Y is:

24.What is 'partial charge' in covalent or co-ordinate bonding?