46295 + Interview Questions in Chemistry

1.	ntif all the ions present at one of the rectangular planes are removed from a nacl structure. Predict its new formulan
Answer» ntif all the ions present at one of the rectangular planes are removed from a nacl structure. Predict its new formulan

Discussion

2.	In the reaction CH3−CH3\|CH−CH2O−CH2−CH3+heatedHI→.......... Which of the following compounds will be formed?
Answer» In the reaction $C H_{3} - C H_{3} \| C H - C H_{2} O - C H_{2} - C H_{3} + h e a t e d H I \to . . . . . . . . . .$ Which of the following compounds will be formed?

2.

In the reaction CH3−CH3|CH−CH2O−CH2−CH3+heatedHI→.......... Which of the following compounds will be formed?

Answer»

In the reaction $C H_{3} - C H_{3} | C H - C H_{2} O - C H_{2} - C H_{3} + h e a t e d H I \to . . . . . . . . . .$

Which of the following compounds will be formed?

Discussion

3.	Aqueous solution of Na2S2O3 on reaction with Cl2 gives
Answer» Aqueous solution of $N a_{2} S_{2} O_{3}$ on reaction with $C l_{2}$ gives

Discussion

4.	15. The correct order of lattice energy of the following ionic compounds is 1 NaCl>MgCl2>CaO>Al2O3 2NaCl>CaO>MgCl2>Al2O3 3 Al2O3>CaO>MgCl2>NaCl 4Al2O3>MgCl2>CaO>NaCl
Answer» 15. The correct order of lattice energy of the following ionic compounds is 1 NaCl>MgCl2>CaO>Al2O3 2NaCl>CaO>MgCl2>Al2O3 3 Al2O3>CaO>MgCl2>NaCl 4Al2O3>MgCl2>CaO>NaCl

Discussion

5.	30. Silver has a density of g/cm^3 the number of silver atoms on a surface of area 10^{-22} meter^2 can be expressed in scientific notation
Answer» 30. Silver has a density of g/cm^3 the number of silver atoms on a surface of area 10^{-22} meter^2 can be expressed in scientific notation

Discussion

6.	Question 29.Show the dilute aqueous solution of hydrochloric acid (a) H3O++Cl−(b) H3O++OH−(c) Cl−+OH−(d) unionised HCl
Answer» Question 29. Show the dilute aqueous solution of hydrochloric acid (a) $H_{3} O^{+} + {Cl}^{-}$ (b) $H_{3} O^{+} + {OH}^{-}$ (c) ${Cl}^{-} + {OH}^{-}$ (d) unionised HCl

Discussion

7.	Turnbull’s blue is
Answer» Turnbull’s blue is

Discussion

8.	Justify the electronic configurations of d-block and f-block elements.for d-block explain why the s orbital has a possibility of having 0 electrons in case of ns0-2 and (n-1)d1-10 as according to Aufbau principal/n+l rule, the lower subshells are filled firstSame for the f-block elements, why can d subshell have 0-1 electrons as in (n-2)f1-14 (n-1)d1-10 ns0-2, and also clarify the same concept of s orbital having a chance of having 0 electrons at the minimum
Answer» Justify the electronic configurations of d-block and f-block elements. for d-block explain why the s orbital has a possibility of having 0 electrons in case of ns0-2 and (n-1)d1-10 as according to Aufbau principal/n+l rule, the lower subshells are filled first Same for the f-block elements, why can d subshell have 0-1 electrons as in (n-2)f1-14 (n-1)d1-10 ns0-2, and also clarify the same concept of s orbital having a chance of having 0 electrons at the minimum

Discussion

9.	When H2O2 is oxidised by a suitable oxidant, the product is
Answer» When $H_{2} O_{2}$ is oxidised by a suitable oxidant, the product is

Discussion

10.	The equilibrium constant for the reaction,N2+2O2⇌2NO2 is 100. The equilibrium constant for the reactions:(a) 2NO2⇌N2+2O2 is K1(b) NO2⇌12N2+O2 is K2Find the value of K1×K2.
Answer» The equilibrium constant for the reaction, $N_{2} + 2 O_{2} ⇌ 2 N O_{2}$ is $100$ . The equilibrium constant for the reactions: (a) $2 N O_{2} ⇌ N_{2} + 2 O_{2}$ is $K_{1}$ (b) $N O_{2} ⇌ \frac{1}{2} N_{2} + O_{2}$ is $K_{2}$ Find the value of $K_{1} \times K_{2}$ .

Discussion

11.	How do Pd, Pt and Ni provide hydrogen to the reaction? Where do they get the hydrogens from?
Answer» How do Pd, Pt and Ni provide hydrogen to the reaction? Where do they get the hydrogens from?

Discussion

12.	The process that yields 99.99% pure aluminium is:
Answer» The process that yields 99.99% pure aluminium is:

Discussion

13.	The hybrid states of C in diamond and graphite are respectively:
Answer» The hybrid states of C in diamond and graphite are respectively:

Discussion

14.	Na2C2HCl−−→ (excess) NaNH2−−−−−−−−−−→(excess) CH3I H2−−−−−−−→Pd−BaSO4 i. O3−−−−−−−→ii. Zn−H2O Final product can be obtained by:
Answer» $N a_{2} C_{2} H C l - - \to (excess) N a N H_{2} - --------- \to (excess) C H_{3} I H_{2} - ------ \to P d - B a S O_{4} i . O_{3} - ------ \to i i . Z n - H_{2} O$ Final product can be obtained by:

Discussion

15.	Ethylene reacts with Br2 to give 1,2−dibromoethane. The anti addition takes place due to the formation of which intermediate?
Answer» Ethylene reacts with $B r_{2}$ to give $1, 2 - dibromoethane$ . The anti addition takes place due to the formation of which intermediate?

Discussion

16.	The IUPAC name of ethylidene chloride is:
Answer» The IUPAC name of ethylidene chloride is:

Discussion

17.	11.Products formed when unsaturated hydrocarbon reacts in the presence of Li liq NH3
Answer» 11.Products formed when unsaturated hydrocarbon reacts in the presence of Li liq NH3

Discussion

18.	The oxidation state of Fe in FeSO4.(NH4)2SO4.6H2O is
Answer» The oxidation state of $F e$ in $F e S O_{4}$ . $(N H_{4})_{2} S O_{4}$ . $6 H_{2} O$ is

Discussion

19.	what is erect image ?
Answer» what is erect image ?

Discussion

20.	For a gas sample with N∘ number of molecules, function N(V) is given by :N(V)=dNdV=(3N∘V3∘)V2 for 0<V<V∘and N(V)=0 for V>V∘where dN is the number of molecules in the speed range V to V+dV. If the rms speed of the molecules is √nV0.Then the value of n is
Answer» For a gas sample with $N_{\circ}$ number of molecules, function N(V) is given by : $N (V) = \frac{d N}{d V} = (\frac{3 N_{\circ}}{V_{\circ}^{3}}) V^{2} f o r 0 < V < V_{\circ} a n d N (V) = 0 f o r V > V_{\circ}$ where dN is the number of molecules in the speed range $V t o V + d V$ . If the rms speed of the molecules is $\sqrt{n} V_{0}$ .Then the value of $n$ is

Discussion

21.	The correct order of lattice energy order is:
Answer» The correct order of lattice energy order is:

Discussion

22.	Among the following species, which has the maximum hydration energy?
Answer» Among the following species, which has the maximum hydration energy?

Discussion

23.	What will be the product of these Bayer-Villiger Oxidations ? 1) CH3-CO-CO-CH3 2) Ph-CH2-CO-CH3
Answer» What will be the product of these Bayer-Villiger Oxidations ? 1) CH3-CO-CO-CH3 2) Ph-CH2-CO-CH3

Discussion

24.	12. total numbers of electrons present in D2o
Answer» 12. total numbers of electrons present in D2o

Discussion

25.	Give the structures of A, B and C in the following reactions : (i) C6H5NO2Sn+HCl−−−−−→A NaNO2+HCl−−−−−−−−→273K BH2O−−→C (ii) CH3CNH2O/H+−−−−−→ ANH3−−−→Δ BBr2+KOH−−−−−−−→C
Answer» Give the structures of A, B and C in the following reactions : (i) $C_{6} H_{5} N O_{2} S n + H C l - ---- \to A N a N O_{2} + H C l - ------- \to 273 K B H_{2} O - - \to C$ (ii) $C H_{3} C N H_{2} O / H^{+} - ---- \to A N H_{3} - -- \to Δ B B r_{2} + K O H - ------ \to C$

Discussion

26.	Themajor organic product formed in the following reaction is:
Answer» The major organic product formed in the following reaction is:

26.

Themajor organic product formed in the following reaction is:

Answer»

The
major organic product formed in the following reaction is:

Discussion

27.	meaning of " SUPERCONDUCTIVITY AROUND 125 K HAS ALREADY BEEN ACHIEVED AND EFFORTS ARE ON TO IMPROVE "
Answer» meaning of " SUPERCONDUCTIVITY AROUND 125 K HAS ALREADY BEEN ACHIEVED AND EFFORTS ARE ON TO IMPROVE "

Discussion

28.	ntConsider a compound slab consisting of two different materials having equal thickness and thermal conductivities K and 2K respectively .The equivalent thermal conductivity of slab is ?n ntExplain in detailn
Answer» ntConsider a compound slab consisting of two different materials having equal thickness and thermal conductivities K and 2K respectively .The equivalent thermal conductivity of slab is ?n ntExplain in detailn

Discussion

29.	Product (A) of the reaction is:
Answer» Product (A) of the reaction is:

Discussion

30.	Mixture X=0.02 mol of [Co(NH3)5SO4]Br and 0.02 mol of [Co(NH3)5Br]SO4 was prepared in 2 litre of solution.1 litre of mixture X+ excess AgNO3→Y1 litre of mixture X + excess BaCl2→ZNumber of moles of Y and Z are
Answer» Mixture $X = 0.02 m o l$ of $[C o (N H_{3})_{5} S O_{4}] B r$ and $0.02 m o l$ of $[C o (N H_{3})_{5} B r] S O_{4}$ was prepared in 2 litre of solution. $1 litre of mixture X+ excess A g N O_{3} \to Y$ $1 litre of mixture X + excess B a C l_{2} \to Z$ Number of moles of Y and Z are

Discussion

31.	Why should magnesium ribbon be cleaned before burning?
Answer» Why should magnesium ribbon be cleaned before burning?

Discussion

32.	In order to decrease the density of a gas which of the following changes must be done
Answer» In order to decrease the density of a gas which of the following changes must be done

Discussion

33.	33. Calculate the difference in the work done when one mole of Al4C3(s) reacts with water in a closed vessel at 27° C against atmospheric pressure and that in an open vessel under the same condition. [Al4C3 + H2O CH4 + Al(OH)3]
Answer» 33. Calculate the difference in the work done when one mole of Al4C3(s) reacts with water in a closed vessel at 27° C against atmospheric pressure and that in an open vessel under the same condition. [Al4C3 + H2O CH4 + Al(OH)3]

Discussion

34.	What is chain isomerism?
Answer» What is chain isomerism?

Discussion

35.	What sorts ofinformations can you draw from the following reaction ?
Answer» What sorts of informations can you draw from the following reaction ?

35.

What sorts ofinformations can you draw from the following reaction ?

Answer»

What sorts of
informations can you draw from the following reaction ?

Discussion

36.	How many sigma and pi bonds will form when one s-orbital undergo head-on overlapping with one p-orbital?
Answer» How many sigma and pi bonds will form when one s-orbital undergo head-on overlapping with one p-orbital?

Discussion

37.	Role of depressants in froth floatation method
Answer» Role of depressants in froth floatation method

Discussion

38.	Howmuch electricity is required in coulomb for the oxidation of(i) 1 mol of H2Oto O2.(ii) 1 mol of FeO to Fe2O3.
Answer» How much electricity is required in coulomb for the oxidation of (i) 1 mol of H₂O to O₂. (ii) 1 mol of FeO to Fe₂O₃.

38.

Howmuch electricity is required in coulomb for the oxidation of(i) 1 mol of H2Oto O2.(ii) 1 mol of FeO to Fe2O3.

Answer»

How
much electricity is required in coulomb for the oxidation of

(i)
1 mol of H₂O
to O₂.

(ii)
1 mol of FeO to Fe₂O₃.

Discussion

39.	For a molecule of benzene, n=2.76×1019 cm−3 and mean free path λ=2.2×10−10 m. Calculate diameter of benzene molecule.
Answer» For a molecule of benzene, $n = 2.76 \times 10^{19} {cm}^{- 3}$ and mean free path $λ = 2.2 \times 10^{- 10} m$ . Calculate diameter of benzene molecule.

Discussion

40.	29. How many gm of NaOH is needed to completely neutralise 25.2 g HNO2 ? a. 22.4 g b. 26.4 g c. 44.8 g d. 50.4 g
Answer» 29. How many gm of NaOH is needed to completely neutralise 25.2 g HNO2 ? a. 22.4 g b. 26.4 g c. 44.8 g d. 50.4 g

Discussion

41.	Which of the following leads to carbon -carbon double bond?
Answer» Which of the following leads to carbon -carbon double bond?

41.

Which of the following leads to carbon -carbon double bond?

Answer»

Which of the following leads to carbon -carbon double bond?

Discussion

42.	24. Why the O-nitrophenol as the major product of the reaction of dil.HNO3 with alcohol in elactrophilic aromatic substitution
Answer» 24. Why the O-nitrophenol as the major product of the reaction of dil.HNO3 with alcohol in elactrophilic aromatic substitution

Discussion

43.	Conductivity (unit Siemen's ) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is
Answer» Conductivity (unit Siemen's ) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is

Discussion

44.	Which of the following does not decolourise iodine? (1) Na2SO3(2) Na2S2O3(3) NaCl(4)NaOH
Answer» Which of the following does not decolourise iodine? (1) Na2SO3 (2) Na2S2O3 (3) NaCl (4)NaOH

Discussion

45.	Two solid spheres are made of copper. The radius of second sphere is 3 times that of the first. The quantities of heat required to raise temperature of each sphere by 2 K are in the ratio of
Answer» Two solid spheres are made of copper. The radius of second sphere is $3$ times that of the first. The quantities of heat required to raise temperature of each sphere by $2 K$ are in the ratio of

Discussion

46.	15. Two solutions A and B form ideal solutions. At 300K, the vapour pressure of the solution containing 1 mole of A and 3 mole of B ie 550mmHg. At the same temperature, if one more mole of B is added to this solution, the vapour pressure of the solution increase by 10mmHg. The vapour pressure of A and B in their pure state (in mmHg) respectively are (1)400,600 (2) 500,500 (3) 200,400 (4) 300,600
Answer» 15. Two solutions A and B form ideal solutions. At 300K, the vapour pressure of the solution containing 1 mole of A and 3 mole of B ie 550mmHg. At the same temperature, if one more mole of B is added to this solution, the vapour pressure of the solution increase by 10mmHg. The vapour pressure of A and B in their pure state (in mmHg) respectively are (1)400,600 (2) 500,500 (3) 200,400 (4) 300,600

Discussion

47.	50. Isnt double displacement: AgNO3 + NaCl a reversible reaction?
Answer» 50. Isnt double displacement: AgNO3 + NaCl a reversible reaction?

Discussion

48.	47.Number of soluble salts among the following are AgCl, PbCl2, NaNO3, Ca(OH)2
Answer» 47.Number of soluble salts among the following are AgCl, PbCl2, NaNO3, Ca(OH)2

Discussion

49.	Which species contain only π−bond among the following?
Answer» Which species contain only $π -$ bond among the following?

Discussion

50.	The equilibrium constant of a given cell reaction at 298 K will be Mg ( s ) + Cu^2 + ( aq ) Mg^2+ ( aq ) + Cu ( s ) ( Given : E = 2.7 V ) (a)10^72.1 (b) 10^82.5 (c) 10^55.6 (d) 10^91.5
Answer» The equilibrium constant of a given cell reaction at 298 K will be Mg ( s ) + Cu^2 + ( aq ) Mg^2+ ( aq ) + Cu ( s ) ( Given : E = 2.7 V ) (a)10^72.1 (b) 10^82.5 (c) 10^55.6 (d) 10^91.5

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

ntif all the ions present at one of the rectangular planes are removed from a nacl structure. Predict its new formulan

In the reaction CH3−CH3|CH−CH2O−CH2−CH3+heatedHI→.......... Which of the following compounds will be formed?

Aqueous solution of Na2S2O3 on reaction with Cl2 gives

15. The correct order of lattice energy of the following ionic compounds is 1 NaCl>MgCl2>CaO>Al2O3 2NaCl>CaO>MgCl2>Al2O3 3 Al2O3>CaO>MgCl2>NaCl 4Al2O3>MgCl2>CaO>NaCl

30. Silver has a density of g/cm^3 the number of silver atoms on a surface of area 10^{-22} meter^2 can be expressed in scientific notation

Question 29.Show the dilute aqueous solution of hydrochloric acid (a) H3O++Cl−(b) H3O++OH−(c) Cl−+OH−(d) unionised HCl

Turnbull’s blue is

When H2O2 is oxidised by a suitable oxidant, the product is

The equilibrium constant for the reaction,N2+2O2⇌2NO2 is 100. The equilibrium constant for the reactions:(a) 2NO2⇌N2+2O2 is K1(b) NO2⇌12N2+O2 is K2Find the value of K1×K2.

How do Pd, Pt and Ni provide hydrogen to the reaction? Where do they get the hydrogens from?

The process that yields 99.99% pure aluminium is:

The hybrid states of C in diamond and graphite are respectively:

Na2C2HCl−−→ (excess) NaNH2−−−−−−−−−−→(excess) CH3I H2−−−−−−−→Pd−BaSO4 i. O3−−−−−−−→ii. Zn−H2O Final product can be obtained by:

Ethylene reacts with Br2 to give 1,2−dibromoethane. The anti addition takes place due to the formation of which intermediate?

The IUPAC name of ethylidene chloride is:

11.Products formed when unsaturated hydrocarbon reacts in the presence of Li liq NH3

The oxidation state of Fe in FeSO4.(NH4)2SO4.6H2O is

what is erect image ?

For a gas sample with N∘ number of molecules, function N(V) is given by :N(V)=dNdV=(3N∘V3∘)V2 for 0&lt;V&lt;V∘and N(V)=0 for V&gt;V∘where dN is the number of molecules in the speed range V to V+dV. If the rms speed of the molecules is √nV0.Then the value of n is

The correct order of lattice energy order is:

Among the following species, which has the maximum hydration energy?

What will be the product of these Bayer-Villiger Oxidations ? 1) CH3-CO-CO-CH3 2) Ph-CH2-CO-CH3

12. total numbers of electrons present in D2o

Give the structures of A, B and C in the following reactions : (i) C6H5NO2Sn+HCl−−−−−→A NaNO2+HCl−−−−−−−−→273K BH2O−−→C (ii) CH3CNH2O/H+−−−−−→ ANH3−−−→Δ BBr2+KOH−−−−−−−→C

Themajor organic product formed in the following reaction is:

meaning of " SUPERCONDUCTIVITY AROUND 125 K HAS ALREADY BEEN ACHIEVED AND EFFORTS ARE ON TO IMPROVE "

ntConsider a compound slab consisting of two different materials having equal thickness and thermal conductivities K and 2K respectively .The equivalent thermal conductivity of slab is ?n ntExplain in detailn

Product (A) of the reaction is:

Mixture X=0.02 mol of [Co(NH3)5SO4]Br and 0.02 mol of [Co(NH3)5Br]SO4 was prepared in 2 litre of solution.1 litre of mixture X+ excess AgNO3→Y1 litre of mixture X + excess BaCl2→ZNumber of moles of Y and Z are

Why should magnesium ribbon be cleaned before burning?

In order to decrease the density of a gas which of the following changes must be done

33. Calculate the difference in the work done when one mole of Al4C3(s) reacts with water in a closed vessel at 27° C against atmospheric pressure and that in an open vessel under the same condition. [Al4C3 + H2O CH4 + Al(OH)3]

What is chain isomerism?

What sorts ofinformations can you draw from the following reaction ?

How many sigma and pi bonds will form when one s-orbital undergo head-on overlapping with one p-orbital?

Role of depressants in froth floatation method

Howmuch electricity is required in coulomb for the oxidation of(i) 1 mol of H2Oto O2.(ii) 1 mol of FeO to Fe2O3.

For a molecule of benzene, n=2.76×1019 cm−3 and mean free path λ=2.2×10−10 m. Calculate diameter of benzene molecule.

29. How many gm of NaOH is needed to completely neutralise 25.2 g HNO2 ? a. 22.4 g b. 26.4 g c. 44.8 g d. 50.4 g

Which of the following leads to carbon -carbon double bond?

24. Why the O-nitrophenol as the major product of the reaction of dil.HNO3 with alcohol in elactrophilic aromatic substitution

Conductivity (unit Siemen's ) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is

Which of the following does not decolourise iodine? (1) Na2SO3(2) Na2S2O3(3) NaCl(4)NaOH

Two solid spheres are made of copper. The radius of second sphere is 3 times that of the first. The quantities of heat required to raise temperature of each sphere by 2 K are in the ratio of

50. Isnt double displacement: AgNO3 + NaCl a reversible reaction?

47.Number of soluble salts among the following are AgCl, PbCl2, NaNO3, Ca(OH)2

Which species contain only π−bond among the following?

The equilibrium constant of a given cell reaction at 298 K will be Mg ( s ) + Cu^2 + ( aq ) Mg^2+ ( aq ) + Cu ( s ) ( Given : E = 2.7 V ) (a)10^72.1 (b) 10^82.5 (c) 10^55.6 (d) 10^91.5

For a gas sample with N∘ number of molecules, function N(V) is given by :N(V)=dNdV=(3N∘V3∘)V2 for 0<V<V∘and N(V)=0 for V>V∘where dN is the number of molecules in the speed range V to V+dV. If the rms speed of the molecules is √nV0.Then the value of n is