46295 + Interview Questions in Chemistry

1.	33. What information do we get from the chemical equation? 2NH3 +3CUO =3Cu +3H2O +N2
Answer» 33. What information do we get from the chemical equation? 2NH3 +3CUO =3Cu +3H2O +N2

Discussion

2.	An alkaline earth metal 'M' readily forms water soluble sulphate and water insoluble hydroxide. Its oxide MO is very stable to heat and does not have rock-salt structure. M is :-
Answer» An alkaline earth metal 'M' readily forms water soluble sulphate and water insoluble hydroxide. Its oxide MO is very stable to heat and does not have rock-salt structure. M is :-

Discussion

3.	14. Explanation of costner method of electrolysis of NaCl
Answer» 14. Explanation of costner method of electrolysis of NaCl

Discussion

4.	The total vapour pressure of a mixture of 1 mole of A(partial pressure = 200) and 3 mole of B(partial pressure = 360) is 350 mm Hg. Then this is positive deviation or negative deviation
Answer» The total vapour pressure of a mixture of 1 mole of A(partial pressure = 200) and 3 mole of B(partial pressure = 360) is 350 mm Hg. Then this is positive deviation or negative deviation

Discussion

5.	In SN1 reaction, the racemisation takes place due to:
Answer» In S_N¹ reaction, the racemisation takes place due to:

Discussion

6.	In given compounds,How many compounds are optically active?
Answer» In given compounds, How many compounds are optically active?

Discussion

7.	Raoult law explanation for non volatile solute.
Answer» Raoult law explanation for non volatile solute.

Discussion

8.	Structure of a mixed oxide is cubic close packed (c. c. p.). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is :
Answer» Structure of a mixed oxide is cubic close packed (c. c. p.). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is :

Discussion

9.	Why W have not 5d5 6s1 valence shell electronic configuration instead 5d4 6s2
Answer» Why W have not 5d5 6s1 valence shell electronic configuration instead 5d4 6s2

Discussion

10.	How many of the following will be zero for free expansion of an ideal gas if the system is thermally isolated?___(a) ΔU(b) ΔH(c) Work done(d) Heat exchanged (q)(e) ΔG(f)(f) ΔSTotal(g) ΔSsystem(h) Temp.change(i) Pressure change(j) ΔSTotal
Answer» How many of the following will be zero for free expansion of an ideal gas if the system is thermally isolated?___ (a) $Δ U$ (b) $Δ H$ (c) Work done (d) Heat exchanged (q) (e) $Δ G (f)$ (f) $Δ S_{T o t a l}$ (g) $Δ S_{s y s t e m}$ (h) Temp.change (i) Pressure change (j) $Δ S_{T o t a l}$

Discussion

11.	For the reaction 2A(g) + 3B(g) → 2C(g), if Δ H^° and Δ S^° for reaction are –27.43 kJ and –50 JK–1mol-1 respectively, then Δ G^° for the reaction is
Answer» For the reaction 2A(g) + 3B(g) → 2C(g), if Δ H^° and Δ S^° for reaction are –27.43 kJ and –50 JK–1mol-1 respectively, then Δ G^° for the reaction is

Discussion

12.	What is the correct order of Coagulating power of the following ions? S2−Cl−PO3−4IIIIII
Answer» What is the correct order of Coagulating power of the following ions? $\begin{matrix} S^{2 -} & C l^{-} & P O_{4}^{3 -} I & I I & I I I \end{matrix}$

Discussion

13.	Of the folowing 0.10 m aqueous solutions, which one will exhibit the largest freezing point depression?(Considering comple dissociation wherever applicable)
Answer» Of the folowing $0.10 m$ aqueous solutions, which one will exhibit the largest freezing point depression? (Considering comple dissociation wherever applicable)

Discussion

14.	Number of unit cell in 58.5 g NaCl is
Answer» Number of unit cell in 58.5 g NaCl is

Discussion

15.	How electron form in nucleus?
Answer» How electron form in nucleus?

Discussion

16.	How gypsum is used in the process of making plaster of Paris?
Answer» How gypsum is used in the process of making plaster of Paris?

Discussion

17.	23 Potassium dichromate reacts with potassium iodide in acidic medium what is the oxidation state of product formed from reductant A. +1 B. Zero C. +3 D. +5
Answer» 23 Potassium dichromate reacts with potassium iodide in acidic medium what is the oxidation state of product formed from reductant A. +1 B. Zero C. +3 D. +5

Discussion

18.	How are impurities in preparation of N2 from Nh4NO2 removed by passing through sulphuric acid and potassium Dichromate?
Answer» How are impurities in preparation of N2 from Nh4NO2 removed by passing through sulphuric acid and potassium Dichromate?

Discussion

19.	Select the correct position of 810 unitson the measuring scale.
Answer» $Select the correct position of \frac{8}{10} units$ $on the measuring scale.$

Discussion

20.	What will be the change in the internal energy (in %) when a gas is cooled from 927° to 27°?
Answer» What will be the change in the internal energy (in %) when a gas is cooled from 927° to 27°?

Discussion

21.	Molality (in mol/kg) of a solution in which 0.13 mole of solute is dissolved in 500 gm of water is:
Answer» Molality (in mol/kg) of a solution in which 0.13 mole of solute is dissolved in 500 gm of water is:

Discussion

22.	Calculate the nearest distance of approach of an alpha particle of energy 2.5 Mev being scattered by a gold nucleus Z=79
Answer» Calculate the nearest distance of approach of an alpha particle of energy 2.5 Mev being scattered by a gold nucleus Z=79

Discussion

23.	43. How to identify the hybridisation from given molecular formula and also its geometry and shape?
Answer» 43. How to identify the hybridisation from given molecular formula and also its geometry and shape?

Discussion

24.	Maximum number of electrons that can be accommodated in the subshell with azimuthal quantum number l = 4, is
Answer» Maximum number of electrons that can be accommodated in the subshell with azimuthal quantum number l = 4, is

Discussion

25.	How will you convert (i) ethanoic acid into methanamine? (ii) hexanenitrile into 1-aminopentane? (iii) Methanol to ethanoic acid? (iv) ethanamine into methanamine? (v) Ethanoic acid into propanoic acid (vi) Methanamine into ethanamine? (vii) nitromethane into dimethylamine? (viii) propanoic acid into ethanoic acid?
Answer» How will you convert (i) ethanoic acid into methanamine? (ii) hexanenitrile into 1-aminopentane? (iii) Methanol to ethanoic acid? (iv) ethanamine into methanamine? (v) Ethanoic acid into propanoic acid (vi) Methanamine into ethanamine? (vii) nitromethane into dimethylamine? (viii) propanoic acid into ethanoic acid?

25.

How will you convert (i) ethanoic acid into methanamine? (ii) hexanenitrile into 1-aminopentane? (iii) Methanol to ethanoic acid? (iv) ethanamine into methanamine? (v) Ethanoic acid into propanoic acid (vi) Methanamine into ethanamine? (vii) nitromethane into dimethylamine? (viii) propanoic acid into ethanoic acid?

Answer»

How will you convert

(i) ethanoic acid into methanamine?

(ii) hexanenitrile into 1-aminopentane?

(iii) Methanol to ethanoic acid?

(iv) ethanamine into methanamine?

(v) Ethanoic acid into propanoic acid

(vi) Methanamine into ethanamine?

(vii) nitromethane into dimethylamine?

(viii) propanoic acid into ethanoic acid?

Discussion

26.	x moles of an organic non-volatile monobasic acid were taken and dissolved in water. The change in boiling point △Tb. pH of the solution will be
Answer» x moles of an organic non-volatile monobasic acid were taken and dissolved in water. The change in boiling point $△ T_{b}$ . pH of the solution will be

Discussion

27.	Disha wants to paint her room a unique brown. For that she uses a certain violet paint which contains 30% blue pigment and 70% red pigment by weight. She mixes that violet paint with a certain green paint which contains 50% blue pigment and 50% yellow pigment. When these paints are mixed to produce the brown paint which she uses, it contains 40% blue pigment. If the brown paint weighs 10 grams, then the red pigment contributes how many grams of that weight?
Answer» Disha wants to paint her room a unique brown. For that she uses a certain violet paint which contains $30 %$ blue pigment and $70 %$ red pigment by weight. She mixes that violet paint with a certain green paint which contains $50 %$ blue pigment and $50 %$ yellow pigment. When these paints are mixed to produce the brown paint which she uses, it contains $40 %$ blue pigment. If the brown paint weighs 10 grams, then the red pigment contributes how many grams of that weight?

Discussion

28.	The dipole moment of AB is 1.82 D and the interionic dis†an ce between cation and anion is 0.83\overset oA. Find the % of covalent character (1) 43.25% (2) 54.32% (3) 50% (4) 83.8%
Answer» The dipole moment of AB is 1.82 D and the interionic dis†an ce between cation and anion is 0.83\overset oA. Find the % of covalent character (1) 43.25% (2) 54.32% (3) 50% (4) 83.8%

Discussion

29.	How to know whether the reaction is reduction or oxidation Give me with an example
Answer» How to know whether the reaction is reduction or oxidation Give me with an example

29.

How to know whether the reaction is reduction or oxidation Give me with an example

Answer»

How to know whether the reaction is reduction or oxidation

Give me with an example

Discussion

30.	Match the following: List - IList - II(A) n=6→n=3(In H- atoms)(p)10 lines in the spectrum(B) n=7→n=3(In H atoms)(q) Spectral lines in visible region(C) n=5→n=2(In H-atoms)(r) 6 lines in the spectrum(D) n=5→n=1(In H-atoms) (s) Spectral lines in infrared region (t) Spectral lines in U.V. region
Answer» Match the following: $\begin{matrix} List - I & List - II (A) n = 6 \to n = 3 (In H- atoms) & (p) 10 lines in the spectrum (B) n = 7 \to n = 3 (In H atoms) & (q) Spectral lines in visible region (C) n = 5 \to n = 2 (In H-atoms) & (r) 6 lines in the spectrum (D) n = 5 \to n = 1 (In H-atoms) & (s) Spectral lines in infrared region (t) Spectral lines in U.V. region \end{matrix}$

Discussion

31.	In Williamson synthesis when one alkyl group in a ether is tertiary it form tertiary alkyl iodide but What is the other product wether it is primary alkyl alcohol or iodide
Answer» In Williamson synthesis when one alkyl group in a ether is tertiary it form tertiary alkyl iodide but What is the other product wether it is primary alkyl alcohol or iodide

Discussion

32.	When Ethyl magnesium bromide is treated with heavy water, the expected compound will be
Answer» When Ethyl magnesium bromide is treated with heavy water, the expected compound will be

Discussion

33.	NO2-CH2-CH=CH2 +HBr\overset{}{→ NO2-CH2-CHBr-CH3(Minor) +NO2-CH2-CH2-CH3Br (major)} why 2nd product is majo
Answer» NO2-CH2-CH=CH2 +HBr\overset{}{→ NO2-CH2-CHBr-CH3(Minor) +NO2-CH2-CH2-CH3Br (major)} why 2nd product is majo

Discussion

34.	The following compound can exhibits (CH_3)_2-C=CH-CH (CH_3)-COOH (1) Tautomerism (2) Optical Isomerism (3) Geometrical Isomerism (4) Geometrical and Optical Isomerism.
Answer» The following compound can exhibits (CH_3)_2-C=CH-CH (CH_3)-COOH (1) Tautomerism (2) Optical Isomerism (3) Geometrical Isomerism (4) Geometrical and Optical Isomerism.

Discussion

35.	The gas A2 in the left flask allowed to react with gas B2 present in right flask as ? A2+B2⇌2AB(g); Kc=4 at 27∘C What is the concentration of AB when equillibrium is established-
Answer» The gas $A_{2}$ in the left flask allowed to react with gas $B_{2}$ present in right flask as ? $A_{2} + B_{2} ⇌ 2 A B (g); K_{c} = 4 a t 27^{\circ} C$ What is the concentration of AB when equillibrium is established-

Discussion

36.	The action of AlCl3 in Friedel crafts reaction is
Answer» The action of $A l C l_{3}$ in Friedel crafts reaction is

Discussion

37.	The de-Broglie wavelength and kinetic energy of a particle are 2000 ˚A and 1 eV , respectively. If its kinetic energy becomes 1 MeV, its de-Broglie wavelength will become,
Answer» The de-Broglie wavelength and kinetic energy of a particle are $2000 ˚ A and 1 eV$ , respectively. If its kinetic energy becomes $1 MeV$ , its de-Broglie wavelength will become,

Discussion

38.	Which of the following methods can produce H2O2?
Answer» Which of the following methods can produce $H_{2} O_{2}$ ?

Discussion

39.	Balance the following reaction by ion electron method:KMnO4+H2SO4+HCl→K2SO4+MnSO4+Cl2+H2O
Answer» Balance the following reaction by ion electron method: $K M n O_{4} + H_{2} S O_{4} + H C l \to K_{2} S O_{4} + M n S O_{4} + C l_{2} + H_{2} O$

Discussion

40.	Lithium crystallizes in a work centered cubic crystal. If the length of the arm of the unit cell is 350 pm, then the minimum distance between the two Li atoms is
Answer» Lithium crystallizes in a work centered cubic crystal. If the length of the arm of the unit cell is 350 pm, then the minimum distance between the two Li atoms is

Discussion

41.	A current of 10 A exists in a wire of cross-sectional area 5 mm2. The drift velocity of the electrons is 2×10−3 m/s. The number of free electrons in each cubic meter of the wire are :
Answer» A current of $10 A$ exists in a wire of cross-sectional area $5 {mm}^{2}$ . The drift velocity of the electrons is $2 \times 10^{- 3} m/s$ . The number of free electrons in each cubic meter of the wire are :

Discussion

42.	The number of gm molecules of oxygen in 6.022×1024 CO molecule is:
Answer» The number of gm molecules of oxygen in $6.022 \times 10^{24}$ CO molecule is:

Discussion

43.

Match the following List-I List-II(A) K<1 (e) Critical state(B) K=1 (f) Sub critical state(C) K>1 (g) Super critical

Answer»

Match the following

List-I	List-II
$(A) K < 1$	$(e) Critical state$
$(B) K = 1$	$(f) Sub critical state$
$(C) K > 1$	$(g) Super critical$

Discussion

44.	An element with atomic mass 60 havimg FCC structure has a density of 6.23g/cm^³.What is the edge length of the unit cell?
Answer» An element with atomic mass 60 havimg FCC structure has a density of 6.23g/cm^³.What is the edge length of the unit cell?

Discussion

45.	Which of the following is a metamer of CH3CH2−S−CH2CH3?
Answer» Which of the following is a metamer of $C H_{3} C H_{2} - S - C H_{2} C H_{3}$ ?

Discussion

46.	The change in entropy of 2 moles of an ideal gas upon isothermal expansion at 250 K from 20 litre until the pressure becomes 1 atm Take R=0.08L atm mol−1K−1 ln 2= 0.3), is :
Answer» The change in entropy of 2 moles of an ideal gas upon isothermal expansion at $250 K$ from $20 l i t r e$ until the pressure becomes $1 a t m$ Take $R = 0.08 L a t m m o l^{- 1} K^{- 1}$ ln 2= 0.3), is :

Discussion

47.	Correct order of radius of the 1st orbit of H, He+,Li2+,Be3+ is:
Answer» Correct order of radius of the $1^{s t}$ orbit of $H$ , $H e^{+}, L i^{2 +}, B e^{3 +}$ is:

Discussion

48.	Write the IUPAC name of \|Pt(NH3)2Cl(NH2CH3)\|Cl.
Answer» Write the IUPAC name of \|Pt(NH₃)₂Cl(NH₂CH₃)\|Cl.

Discussion

49.	In the preparation of chlorobenzene from aniline, the most suitable reagant is
Answer» In the preparation of chlorobenzene from aniline, the most suitable reagant is

Discussion

50.	Determine the molecular formula of an oxide of iron in which the mass percent of iron and oxygen are 69•9 and 30•1 respectively
Answer» Determine the molecular formula of an oxide of iron in which the mass percent of iron and oxygen are 69•9 and 30•1 respectively

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

33. What information do we get from the chemical equation? 2NH3 +3CUO =3Cu +3H2O +N2

An alkaline earth metal 'M' readily forms water soluble sulphate and water insoluble hydroxide. Its oxide MO is very stable to heat and does not have rock-salt structure. M is :-

14. Explanation of costner method of electrolysis of NaCl

The total vapour pressure of a mixture of 1 mole of A(partial pressure = 200) and 3 mole of B(partial pressure = 360) is 350 mm Hg. Then this is positive deviation or negative deviation

In SN1 reaction, the racemisation takes place due to:

In given compounds,How many compounds are optically active?

Raoult law explanation for non volatile solute.

Structure of a mixed oxide is cubic close packed (c. c. p.). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is :

Why W have not 5d5 6s1 valence shell electronic configuration instead 5d4 6s2

How many of the following will be zero for free expansion of an ideal gas if the system is thermally isolated?___(a) ΔU(b) ΔH(c) Work done(d) Heat exchanged (q)(e) ΔG(f)(f) ΔSTotal(g) ΔSsystem(h) Temp.change(i) Pressure change(j) ΔSTotal

For the reaction 2A(g) + 3B(g) → 2C(g), if Δ H^° and Δ S^° for reaction are –27.43 kJ and –50 JK–1mol-1 respectively, then Δ G^° for the reaction is

What is the correct order of Coagulating power of the following ions? S2−Cl−PO3−4IIIIII

Of the folowing 0.10 m aqueous solutions, which one will exhibit the largest freezing point depression?(Considering comple dissociation wherever applicable)

Number of unit cell in 58.5 g NaCl is

How electron form in nucleus?

How gypsum is used in the process of making plaster of Paris?

23 Potassium dichromate reacts with potassium iodide in acidic medium what is the oxidation state of product formed from reductant A. +1 B. Zero C. +3 D. +5

How are impurities in preparation of N2 from Nh4NO2 removed by passing through sulphuric acid and potassium Dichromate?

Select the correct position of 810 unitson the measuring scale.

What will be the change in the internal energy (in %) when a gas is cooled from 927° to 27°?

Molality (in mol/kg) of a solution in which 0.13 mole of solute is dissolved in 500 gm of water is:

Calculate the nearest distance of approach of an alpha particle of energy 2.5 Mev being scattered by a gold nucleus Z=79

43. How to identify the hybridisation from given molecular formula and also its geometry and shape?

Maximum number of electrons that can be accommodated in the subshell with azimuthal quantum number l = 4, is

x moles of an organic non-volatile monobasic acid were taken and dissolved in water. The change in boiling point △Tb. pH of the solution will be

The dipole moment of AB is 1.82 D and the interionic dis†an ce between cation and anion is 0.83\overset oA. Find the % of covalent character (1) 43.25% (2) 54.32% (3) 50% (4) 83.8%

How to know whether the reaction is reduction or oxidation Give me with an example

In Williamson synthesis when one alkyl group in a ether is tertiary it form tertiary alkyl iodide but What is the other product wether it is primary alkyl alcohol or iodide

When Ethyl magnesium bromide is treated with heavy water, the expected compound will be

NO2-CH2-CH=CH2 +HBr\overset{}{→ NO2-CH2-CHBr-CH3(Minor) +NO2-CH2-CH2-CH3Br (major)} why 2nd product is majo

The following compound can exhibits (CH_3)_2-C=CH-CH (CH_3)-COOH (1) Tautomerism (2) Optical Isomerism (3) Geometrical Isomerism (4) Geometrical and Optical Isomerism.

The gas A2 in the left flask allowed to react with gas B2 present in right flask as ? A2+B2⇌2AB(g); Kc=4 at 27∘C What is the concentration of AB when equillibrium is established-

The action of AlCl3 in Friedel crafts reaction is

The de-Broglie wavelength and kinetic energy of a particle are 2000 ˚A and 1 eV , respectively. If its kinetic energy becomes 1 MeV, its de-Broglie wavelength will become,

Which of the following methods can produce H2O2?

Balance the following reaction by ion electron method:KMnO4+H2SO4+HCl→K2SO4+MnSO4+Cl2+H2O

Lithium crystallizes in a work centered cubic crystal. If the length of the arm of the unit cell is 350 pm, then the minimum distance between the two Li atoms is

A current of 10 A exists in a wire of cross-sectional area 5 mm2. The drift velocity of the electrons is 2×10−3 m/s. The number of free electrons in each cubic meter of the wire are :

The number of gm molecules of oxygen in 6.022×1024 CO molecule is:

Match the following List-I List-II(A) K&lt;1 (e) Critical state(B) K=1 (f) Sub critical state(C) K&gt;1 (g) Super critical

An element with atomic mass 60 havimg FCC structure has a density of 6.23g/cm^³.What is the edge length of the unit cell?

Which of the following is a metamer of CH3CH2−S−CH2CH3?

The change in entropy of 2 moles of an ideal gas upon isothermal expansion at 250 K from 20 litre until the pressure becomes 1 atm Take R=0.08L atm mol−1K−1 ln 2= 0.3), is :

Correct order of radius of the 1st orbit of H, He+,Li2+,Be3+ is:

Write the IUPAC name of |Pt(NH3)2Cl(NH2CH3)|Cl.

In the preparation of chlorobenzene from aniline, the most suitable reagant is

Determine the molecular formula of an oxide of iron in which the mass percent of iron and oxygen are 69•9 and 30•1 respectively

Match the following List-I List-II(A) K<1 (e) Critical state(B) K=1 (f) Sub critical state(C) K>1 (g) Super critical