46295 + Interview Questions in Chemistry

1.	The correct order of wavelength (λmax) of the halide to metal charge-transfer band of (i) [Co(NH3)5Cl]2+ (ii) [Co(NH3)5Br]2+ (iii) [Co(NH3)5I]2+
Answer» The correct order of wavelength ( $λ_{m a x}$ ) of the halide to metal charge-transfer band of $(i) [C o (N H_{3})_{5} C l]^{2 +}$ $(i i) [C o (N H_{3})_{5} B r]^{2 +}$ $(i i i) [C o (N H_{3})_{5} I]^{2 +}$

Discussion

2.	3py orbital has___ nodal plane:
Answer» $3 p_{y}$ orbital has___ nodal plane:

Discussion

3.	Consider the following experiment shown alongside. Which among the following statements are correct? (i) water moves from the vessel M to N through Y (ii) Sugar solution moves from conc solution to dilute solution through X (iii) Water moves from the vessel N to M through Y (iv) Water moves from B to A through X
Answer» Consider the following experiment shown alongside. Which among the following statements are correct? (i) water moves from the vessel M to N through Y (ii) Sugar solution moves from conc solution to dilute solution through X (iii) Water moves from the vessel N to M through Y (iv) Water moves from B to A through X

Discussion

4.	In which of the following, a salt of type KMO2 (M = Al or B) is obtained?
Answer» In which of the following, a salt of type $K M O_{2}$ (M = Al or B) is obtained?

Discussion

5.	Calculate the amount of KClO3 needed to supply sufficient oxygen for burning 112 l of CO gas at NTP? Please elaborate nicely.
Answer» Calculate the amount of KClO3 needed to supply sufficient oxygen for burning 112 l of CO gas at NTP? Please elaborate nicely.

5.

Calculate the amount of KClO3 needed to supply sufficient oxygen for burning 112 l of CO gas at NTP? Please elaborate nicely.

Answer»

Calculate the amount of KClO3 needed to supply sufficient oxygen for burning 112 l of CO gas at NTP?

Please elaborate nicely.

Discussion

6.	Aluminium chloride exists as a dimer, Al2Cl3, in solid state as well as in solution of no-polar solvents such as benzene. When dissolved in water it gives.
Answer» Aluminium chloride exists as a dimer, $A l_{2} C l_{3}$ , in solid state as well as in solution of no-polar solvents such as benzene. When dissolved in water it gives.

Discussion

7.	Discuss the differences between the contributions of Taylor and Fayol.
Answer» Discuss the differences between the contributions of Taylor and Fayol.

Discussion

8.	A compound has the molecular formula X4O6 . If 11 g of X4O6 has 6.2 g of X, then what is the atomic mass of X?
Answer» A compound has the molecular formula $X_{4} O_{6}$ . If 11 g of $X_{4} O_{6}$ has 6.2 g of X, then what is the atomic mass of X?

Discussion

9.	Ice starts forming in lake with water at 0o C and when the atmospheric temperature is −10o C. If the time taken for 1 cm of ice to form is 7 hours, then the time taken for the thickness of ice to change from 1 cm to 2 cm is
Answer» Ice starts forming in lake with water at $0^{o} C$ and when the atmospheric temperature is $- 10^{o} C$ . If the time taken for 1 cm of ice to form is 7 hours, then the time taken for the thickness of ice to change from 1 cm to 2 cm is

Discussion

10.	In methyl alcohol solution, bromine reacts with ethylene to yield in addition to 1, 2-dibromoethane because
Answer» In methyl alcohol solution, bromine reacts with ethylene to yield in addition to 1, 2-dibromoethane because

Discussion

11.	What is the mass percentage of Fe3+ ion present in Fe(0.93)O?
Answer» What is the mass percentage of Fe3+ ion present in Fe(0.93)O?

Discussion

12.	What is trivial name
Answer» What is trivial name

Discussion

13.	Among the following species, identify the iso-structural pairs. NF3, NO−3, BF3, H3O+, N3H
Answer» Among the following species, identify the iso-structural pairs. $N F_{3}, N O_{3}^{-}, B F_{3}, H_{3} O^{+}, N_{3} H$

13.

Among the following species, identify the iso-structural pairs. NF3, NO−3, BF3, H3O+, N3H

Answer»

Among the following species, identify the iso-structural pairs.

$N F_{3}, N O_{3}^{-}, B F_{3}, H_{3} O^{+}, N_{3} H$

Discussion

14.	Electron gain enthalpy of oxygen is less than that of sulphur. Why?
Answer» Electron gain enthalpy of oxygen is less than that of sulphur. Why?

Discussion

15.	Methyl alcohol can be distinguished from ethyl alcohol using [KCET 1984; BHU 2000]
Answer» Methyl alcohol can be distinguished from ethyl alcohol using [KCET 1984; BHU 2000]

Discussion

16.	In presence of air, fermentation of ethyl alcohol by azotobactor bacteria forms [MP PMT 1989]
Answer» In presence of air, fermentation of ethyl alcohol by azotobactor bacteria forms [MP PMT 1989]

Discussion

17.	What is the application of Henry's law in deep sea diving?
Answer» What is the application of Henry's law in deep sea diving?

Discussion

18.	Halides of alkaline earth metals form hydrates such as MgCl2.6H2O,CaCl2.6H2O, BaCl2.2H2O and SrCl2.2H2O. This shows that halides of group 2 elements
Answer» Halides of alkaline earth metals form hydrates such as MgCl₂.6H₂O,CaCl₂.6H₂O, BaCl₂.2H₂O and SrCl₂.2H₂O. This shows that halides of group 2 elements

Discussion

19.	Consider the following reactions A(i)CH3MgBr−−−−−−−−→(ii)H3O+BCu−−−→573K→2-methyl-2-butene The mass percentage of carbon in A is:
Answer» Consider the following reactions $A (i) C H_{3} M g B r - ------- \to (i i) H_{3} O^{+} B C u - -- \to 573 K \to 2-methyl-2-butene$ The mass percentage of carbon in A is:

Discussion

20.	Is the electron gain enthalpy value of Fluorine is positive or less negative?
Answer» Is the electron gain enthalpy value of Fluorine is positive or less negative?

Discussion

21.	The correct order of atomic radii for the following isoelectronic species F−, O2−, Na+, Mg2+ is:
Answer» The correct order of atomic radii for the following isoelectronic species $F^{-}, O^{2 -}, N a^{+}, M g^{2 +}$ is:

Discussion

22.	How many structural isomers of C6H12 having 3 member ring?
Answer» How many structural isomers of C6H12 having 3 member ring?

Discussion

23.	K2[Ni(CN)4]K in liq.NH3−−−−−−−−→ "X", regarding this reaction correct statement is/are
Answer» $K_{2} [N i (C N)_{4}] K i n l i q . N H_{3} - ------- \to$ "X", regarding this reaction correct statement is/are

Discussion

24.	Marine life prefer to be at the lower level during summer
Answer» Marine life prefer to be at the lower level during summer

Discussion

25.	Write the uses of medicines.
Answer» Write the uses of medicines.

Discussion

26.	What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per 500 mL ? (a) 4 mol L−1 (b) 20 mol L−1 (c) 0.2 mol L−1 (d) 2 mol L−1
Answer» What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per 500 mL ? (a) $4 m o l L^{- 1}$ (b) $20 m o l L^{- 1}$ (c) $0.2 m o l L^{- 1}$ (d) $2 m o l L^{- 1}$

26.

What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per 500 mL ? (a) 4 mol L−1 (b) 20 mol L−1 (c) 0.2 mol L−1 (d) 2 mol L−1

Answer»

What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per 500 mL ?

(a) $4 m o l L^{- 1}$ (b) $20 m o l L^{- 1}$

(c) $0.2 m o l L^{- 1}$ (d) $2 m o l L^{- 1}$

Discussion

27.	A mixture of FeO and Fe3O4 when heated in air to a constant mass gains 5% by mass. calculate the composition of the mixture?
Answer» A mixture of FeO and Fe₃O₄when heated in air to a constant mass gains 5% by mass. calculate the composition of the mixture?

Discussion

28.	Select the correct statement(s):- i)Schottky defect is shown by CsCl ii)Frenkel defect is shown by Zns iii)Hexagonal close packing (hcp) & Cubic close packing (ccp) structure has same co-ordination no.12 iv) At high pressure, the co-ordination number increases.
Answer» Select the correct statement(s):- i)Schottky defect is shown by CsCl ii)Frenkel defect is shown by Zns iii)Hexagonal close packing (hcp) & Cubic close packing (ccp) structure has same co-ordination no.12 iv) At high pressure, the co-ordination number increases.

Discussion

29.	Adenosine is an example of:
Answer» Adenosine is an example of:

Discussion

30.	In order to cause coagulation of 100 mL arsenous sulphide sol 11.2 mL of 2 M NaCl solution is used. What will be the flocculation value of NaCl?
Answer» In order to cause coagulation of $100 mL$ arsenous sulphide sol $11.2 mL$ of $2 M N a C l$ solution is used. What will be the flocculation value of $N a C l$ ?

Discussion

31.	The element which has not yet been reacted with F2 is :
Answer» The element which has not yet been reacted with F₂ is :

Discussion

32.	Why carbon is hydrophobic??
Answer» Why carbon is hydrophobic??

Discussion

33.	If pressure of a gas contained in a closed vessel is increased by 0.4% when heated by 1∘C, the initial temperature must be
Answer» If pressure of a gas contained in a closed vessel is increased by 0.4% when heated by $1^{\circ} C$ , the initial temperature must be

Discussion

34.	The solubility of CaF2 is a moles/litre. Then its solubility product is .....
Answer» The solubility of $C a F_{2}$ is a moles/litre. Then its solubility product is .....

34.

The solubility of CaF2 is a moles/litre. Then its solubility product is .....

Answer»

The solubility of $C a F_{2}$ is a moles/litre. Then its solubility product is .....

Discussion

35.	(i) Draw the resonating structure of ozone molecule (ii) Draw the resonating structure of nitrate ion
Answer» (i) Draw the resonating structure of ozone molecule (ii) Draw the resonating structure of nitrate ion

35.

(i) Draw the resonating structure of ozone molecule (ii) Draw the resonating structure of nitrate ion

Answer»

(i)

Draw the resonating structure of

ozone molecule

(ii)

Draw the resonating structure of

nitrate ion

Discussion

36.	In the following set of reactions: A→2C+D3A→5E+2F 15 moles of A was consumed. It was found that 10 moles of C were formed. Find the amount of E formed in moles.
Answer» In the following set of reactions: $A \to 2 C + D 3 A \to 5 E + 2 F$ 15 moles of A was consumed. It was found that 10 moles of C were formed. Find the amount of E formed in moles.

Discussion

37.	The total number of diprotic acids among the following is: H2SO4, H2CrO4, H3PO3, H2SO3, H3BO3, H2S2O7, H3PO4. ___
Answer» The total number of diprotic acids among the following is: $H_{2} S O_{4}, H_{2} C r O_{4}, H_{3} P O_{3}, H_{2} S O_{3}, H_{3} B O_{3}, H_{2} S_{2} O_{7}, H_{3} P O_{4} .$ ___

Discussion

38.	The coordination number of cation and anion in Fluorite CaF2 and CsCl are respectively
Answer» The coordination number of cation and anion in Fluorite $C a F_{2}$ and CsCl are respectively

Discussion

39.	Consider a weak monobasic acid HA having a concentration C with degree of dissociation, α<<1.. The pH of this weak acid in terms of acid dissociation constant Ka and concentration C is :
Answer» Consider a weak monobasic acid $H A$ having a concentration C with degree of dissociation, $α << 1.$ . The pH of this weak acid in terms of acid dissociation constant $K_{a}$ and concentration $C$ is :

Discussion

40.	A mixture of 4 gm helium and 28 gm of nitrogen is enclosed in a vessel of constant volume at 300∘K. The quantity of heat absorbed by the mixture to double the root-mean velocity of its molecules is (R = Universal gas constant)
Answer» A mixture of $4 gm$ helium and $28 gm$ of nitrogen is enclosed in a vessel of constant volume at $300^{\circ} K$ . The quantity of heat absorbed by the mixture to double the root-mean velocity of its molecules is ( $R$ = Universal gas constant)

Discussion

41.	The mass & volume of a body are 22.00 g & 7.0 cm3 respectively. The density of material of body in correct significant figures is
Answer» The mass & volume of a body are 22.00 $g$ & $7.0 c m^{3}$ respectively. The density of material of body in correct significant figures is

Discussion

42.	Calculate the mass of a photon with wavelength 3.6˚A.
Answer» Calculate the mass of a photon with wavelength $3.6 ˚ A$ .

Discussion

43.	Isomerism that occurs due to different alkyl chains on either side of the functional group in the molecule is:
Answer» Isomerism that occurs due to different alkyl chains on either side of the functional group in the molecule is:

Discussion

44.	One mole of a non - ideal gas undergoes a change of state (2.0 atm, 3.0 L, 95K) → (4.0 atm, 5.0L, 245 K) with a change in internal energy ΔU=30.0L atm. The change in enthalpy of the process in L atm is ?
Answer» One mole of a non - ideal gas undergoes a change of state (2.0 atm, 3.0 L, 95K) $\to$ (4.0 atm, 5.0L, 245 K) with a change in internal energy $Δ U = 30.0 L$ atm. The change in enthalpy of the process in L atm is ?

Discussion

45.	What is the octet rule?
Answer» What is the octet rule?

Discussion

46.	If the dispersed phase is solid and the dispersion medium is liquid, then the colloid is known as ___ .
Answer» If the dispersed phase is solid and the dispersion medium is liquid, then the colloid is known as ___ .

Discussion

47.	In the electrochemical cell: Zn\|ZnSO4 (0.01M)\|\| CuSO4(1.0M)Cu, the emf of this Daniell cell is E1. When the concentration of ZnSO4 is changed to 1.0 M and that of CuSO4 changed to 0.01 M, the emf changes to E2. From the followings, which one is the relationship between E1 and E2? (Given, RT/F = 0.059)
Answer» In the electrochemical cell: $Z n \| Z n S O_{4} (0.01 M) \| \| C u S O_{4} (1.0 M) C u$ , the emf of this Daniell cell is $E_{1}$ . When the concentration of $Z n S O_{4}$ is changed to 1.0 M and that of $C u S O_{4}$ changed to 0.01 M, the emf changes to $E_{2}$ . From the followings, which one is the relationship between $E_{1}$ and $E_{2}$ ? (Given, RT/F = 0.059)

Discussion

48.	A closed container has a gas A at a pressure of 200 mm of Hg at 300 K. When the container is heated to 600 K, A starts decomposing via first order kinetics as, A(g)→3B(g)+2C(g) After 1 hour and 20 minutes, the total pressure of the gaseous mixture is 1900 mm of Hg. What is the half-life of the reaction (in min) at 600 K?
Answer» A closed container has a gas A at a pressure of 200 mm of Hg at 300 K. When the container is heated to 600 K, A starts decomposing via first order kinetics as, $A (g) \to 3 B (g) + 2 C (g)$ After 1 hour and 20 minutes, the total pressure of the gaseous mixture is 1900 mm of Hg. What is the half-life of the reaction (in min) at 600 K?

Discussion

49.	Carnation is diamagnetic or paramagnetic
Answer» Carnation is diamagnetic or paramagnetic

Discussion

50.	A solution which has 10−3 M each of Mn2+,Fe2+,Zn2+ and Hg2+ is treated with 10−16 M sulphide ion. If Ksp of MnS, FeS, ZnSand HgS are 10−15, 10−23, 10−20 and 10−54 respectively, which one will precipitate first?
Answer» A solution which has $10^{- 3}$ M each of $M n^{2 +}, F e^{2 +}, Z n^{2 +}$ and $H g^{2 +}$ is treated with $10^{- 16}$ M sulphide ion. If $K_{s p}$ of $M n S$ , $F e S$ , $Z n S$ and $H g S$ are $10^{- 15}$ , $10^{- 23}$ , $10^{- 20}$ and $10^{- 54}$ respectively, which one will precipitate first?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The correct order of wavelength (λmax) of the halide to metal charge-transfer band of (i) [Co(NH3)5Cl]2+ (ii) [Co(NH3)5Br]2+ (iii) [Co(NH3)5I]2+

3py orbital has___ nodal plane:

In which of the following, a salt of type KMO2 (M = Al or B) is obtained?

Calculate the amount of KClO3 needed to supply sufficient oxygen for burning 112 l of CO gas at NTP? Please elaborate nicely.

Aluminium chloride exists as a dimer, Al2Cl3, in solid state as well as in solution of no-polar solvents such as benzene. When dissolved in water it gives.

Discuss the differences between the contributions of Taylor and Fayol.

A compound has the molecular formula X4O6 . If 11 g of X4O6 has 6.2 g of X, then what is the atomic mass of X?

Ice starts forming in lake with water at 0o C and when the atmospheric temperature is −10o C. If the time taken for 1 cm of ice to form is 7 hours, then the time taken for the thickness of ice to change from 1 cm to 2 cm is

In methyl alcohol solution, bromine reacts with ethylene to yield in addition to 1, 2-dibromoethane because

What is the mass percentage of Fe3+ ion present in Fe(0.93)O?

What is trivial name

Among the following species, identify the iso-structural pairs. NF3, NO−3, BF3, H3O+, N3H

Electron gain enthalpy of oxygen is less than that of sulphur. Why?

Methyl alcohol can be distinguished from ethyl alcohol using [KCET 1984; BHU 2000]

In presence of air, fermentation of ethyl alcohol by azotobactor bacteria forms [MP PMT 1989]

What is the application of Henry's law in deep sea diving?

Halides of alkaline earth metals form hydrates such as MgCl2.6H2O,CaCl2.6H2O, BaCl2.2H2O and SrCl2.2H2O. This shows that halides of group 2 elements

Consider the following reactions A(i)CH3MgBr−−−−−−−−→(ii)H3O+BCu−−−→573K→2-methyl-2-butene The mass percentage of carbon in A is:

Is the electron gain enthalpy value of Fluorine is positive or less negative?

The correct order of atomic radii for the following isoelectronic species F−, O2−, Na+, Mg2+ is:

How many structural isomers of C6H12 having 3 member ring?

K2[Ni(CN)4]K in liq.NH3−−−−−−−−→ "X", regarding this reaction correct statement is/are

Marine life prefer to be at the lower level during summer

Write the uses of medicines.

What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per 500 mL ? (a) 4 mol L−1 (b) 20 mol L−1 (c) 0.2 mol L−1 (d) 2 mol L−1

A mixture of FeO and Fe3O4 when heated in air to a constant mass gains 5% by mass. calculate the composition of the mixture?

Select the correct statement(s):- i)Schottky defect is shown by CsCl ii)Frenkel defect is shown by Zns iii)Hexagonal close packing (hcp) &amp; Cubic close packing (ccp) structure has same co-ordination no.12 iv) At high pressure, the co-ordination number increases.

Adenosine is an example of:

In order to cause coagulation of 100 mL arsenous sulphide sol 11.2 mL of 2 M NaCl solution is used. What will be the flocculation value of NaCl?

The element which has not yet been reacted with F2 is :

Why carbon is hydrophobic??

If pressure of a gas contained in a closed vessel is increased by 0.4% when heated by 1∘C, the initial temperature must be

The solubility of CaF2 is a moles/litre. Then its solubility product is .....

(i) Draw the resonating structure of ozone molecule (ii) Draw the resonating structure of nitrate ion

In the following set of reactions: A→2C+D3A→5E+2F 15 moles of A was consumed. It was found that 10 moles of C were formed. Find the amount of E formed in moles.

The total number of diprotic acids among the following is: H2SO4, H2CrO4, H3PO3, H2SO3, H3BO3, H2S2O7, H3PO4. ___

The coordination number of cation and anion in Fluorite CaF2 and CsCl are respectively

Consider a weak monobasic acid HA having a concentration C with degree of dissociation, α&lt;&lt;1.. The pH of this weak acid in terms of acid dissociation constant Ka and concentration C is :

A mixture of 4 gm helium and 28 gm of nitrogen is enclosed in a vessel of constant volume at 300∘K. The quantity of heat absorbed by the mixture to double the root-mean velocity of its molecules is (R = Universal gas constant)

The mass &amp; volume of a body are 22.00 g &amp; 7.0 cm3 respectively. The density of material of body in correct significant figures is

Calculate the mass of a photon with wavelength 3.6˚A.

Isomerism that occurs due to different alkyl chains on either side of the functional group in the molecule is:

One mole of a non - ideal gas undergoes a change of state (2.0 atm, 3.0 L, 95K) → (4.0 atm, 5.0L, 245 K) with a change in internal energy ΔU=30.0L atm. The change in enthalpy of the process in L atm is ?

What is the octet rule?

If the dispersed phase is solid and the dispersion medium is liquid, then the colloid is known as ___ .

Carnation is diamagnetic or paramagnetic

A solution which has 10−3 M each of Mn2+,Fe2+,Zn2+ and Hg2+ is treated with 10−16 M sulphide ion. If Ksp of MnS, FeS, ZnSand HgS are 10−15, 10−23, 10−20 and 10−54 respectively, which one will precipitate first?

Select the correct statement(s):- i)Schottky defect is shown by CsCl ii)Frenkel defect is shown by Zns iii)Hexagonal close packing (hcp) & Cubic close packing (ccp) structure has same co-ordination no.12 iv) At high pressure, the co-ordination number increases.

Consider a weak monobasic acid HA having a concentration C with degree of dissociation, α<<1.. The pH of this weak acid in terms of acid dissociation constant Ka and concentration C is :

The mass & volume of a body are 22.00 g & 7.0 cm3 respectively. The density of material of body in correct significant figures is