46295 + Interview Questions in Chemistry

1.	In which element shielding effect is not possible ?
Answer» In which element shielding effect is not possible ?

Discussion

2.	An element has face-centred cubic (fcc) structure with a cell edge of a. The distance between the centres of two nearest tetrahedral voids in the lattice is:
Answer» An element has face-centred cubic (fcc) structure with a cell edge of a. The distance between the centres of two nearest tetrahedral voids in the lattice is:

Discussion

3.	What is the density and temperature of Cross-linked polymers?
Answer» What is the density and temperature of Cross-linked polymers?

Discussion

4.	what is the concentration of Ba(CN)2 in the aqueous solution of the mixture of Ba(CN)2 and 0.1 M HCN having pH = 5. given; pKb for CN– at 25°C is 8 :-
Answer» what is the concentration of Ba(CN)2 in the aqueous solution of the mixture of Ba(CN)2 and 0.1 M HCN having pH = 5. given; pKb for CN– at 25°C is 8 :-

Discussion

5.	A hydrocarbon with the minimum number of carbon atoms, capable of showing both geometrical and optical isomerism is (a) 3-methylpentene (b) 3-methylpent-2-ene (c) 4-methylhex-2-ene (d) 4-methylhept-3-ene
Answer» A hydrocarbon with the minimum number of carbon atoms, capable of showing both geometrical and optical isomerism is (a) 3-methylpentene (b) 3-methylpent-2-ene (c) 4-methylhex-2-ene (d) 4-methylhept-3-ene

Discussion

6.	Consider thiol anion RS- and alkoxy anion RO- .Which of the following statements is correct?
Answer» Consider thiol anion RS^- and alkoxy anion RO^- .Which of the following statements is correct?

Discussion

7.	Find the molality of the thiosulphate (Na2S2O3) solution, if the density of a 3 M thiosulphate (Na2S2O3) solution is 1.2 g/mL.
Answer» Find the molality of the thiosulphate $(N a_{2} S_{2} O_{3})$ solution, if the density of a $3 M$ thiosulphate $(N a_{2} S_{2} O_{3})$ solution is $1.2 g/mL$ .

Discussion

8.	For Arrhenius equation, the intercept of the plot lnk vs 1T is:
Answer» For Arrhenius equation, the intercept of the plot lnk vs $\frac{1}{T}$ is:

Discussion

9.	What is the difference between isobutyl and secbutyl.
Answer» What is the difference between isobutyl and secbutyl.

Discussion

10.	60. What is twistane
Answer» 60. What is twistane

Discussion

11.	The product of the reaction between RCHO and NH2NH2 is
Answer» The product of the reaction between $R C H O$ and $N H_{2} N H_{2}$ is

Discussion

12.	Column-I: Subshell Column-II: Number of spherical nodes Column-III: Radial plotThe only correct combination for the last electron of Cl− is:
Answer» Column-I: Subshell Column-II: Number of spherical nodes Column-III: Radial plot The only correct combination for the last electron of $C l^{-}$ is:

12.

Column-I: Subshell Column-II: Number of spherical nodes Column-III: Radial plotThe only correct combination for the last electron of Cl− is:

Answer»

Column-I: Subshell Column-II: Number of spherical nodes Column-III: Radial plot

The only correct combination for the last electron of $C l^{-}$ is:

Discussion

13.	Describe in brief about the phenomenon depicted in the image.
Answer» Describe in brief about the phenomenon depicted in the image.

Discussion

14.	How does the lithium ion battery work and how does it gets charged?
Answer» How does the lithium ion battery work and how does it gets charged?

Discussion

15.	How to calculate the packing efficiency in hexagonal cubic packaging.
Answer» How to calculate the packing efficiency in hexagonal cubic packaging.

Discussion

16.	3-Bromo-2-methylbutane reaction with NaOCH2CH3 give major product?
Answer» 3-Bromo-2-methylbutane reaction with NaOCH2CH3 give major product?

Discussion

17.	dπ-Pπ bond present in( explain with the structues) (1) (CO3)2- (2) (NO3)- (3) (PO4)3- (4) NO2)-
Answer» dπ-Pπ bond present in( explain with the structues) (1) (CO3)2- (2) (NO3)- (3) (PO4)3- (4) NO2)-

Discussion

18.	Which of the following has longest C−O bond length?(Free C−O bond length in CO is 1.128 oA)
Answer» Which of the following has longest $C - O$ bond length? (Free $C - O$ bond length in $C O$ is $1.128 o A$ )

Discussion

19.	21. What is a CGS Unit of Volume ?
Answer» 21. What is a CGS Unit of Volume ?

Discussion

20.	Ka for butyric acid is 2.0×10−5. Calculate pH and hydroxyl ion concentration in 0.2 M aqueous solution of sodium butyrate.
Answer» $K_{a}$ for butyric acid is $2.0 \times 10^{- 5}$ . Calculate pH and hydroxyl ion concentration in $0.2 M$ aqueous solution of sodium butyrate.

Discussion

21.	One mole of an organic compound requires half mole of oxygen to give an acid. The compound may be
Answer» One mole of an organic compound requires half mole of oxygen to give an acid. The compound may be

Discussion

22.	Compare the chemistry of actinoids with that of the lanthanoids with special reference to: (i) electronic configuration (iii) oxidation state (ii) atomic and ionic sizes and (iv) chemical reactivity.
Answer» Compare the chemistry of actinoids with that of the lanthanoids with special reference to: (i) electronic configuration (iii) oxidation state (ii) atomic and ionic sizes and (iv) chemical reactivity.

22.

Compare the chemistry of actinoids with that of the lanthanoids with special reference to: (i) electronic configuration (iii) oxidation state (ii) atomic and ionic sizes and (iv) chemical reactivity.

Answer»

Compare
the chemistry of actinoids with that of the lanthanoids with special
reference to:

(i)
electronic configuration
(iii) oxidation
state

(ii)
atomic and ionic sizes and
(iv) chemical
reactivity.

Discussion

23.	In nitrogen, aluminium, oxygen, calcium the correct order of Paramagnetism is? And why....
Answer» In nitrogen, aluminium, oxygen, calcium the correct order of Paramagnetism is? And why....

23.

In nitrogen, aluminium, oxygen, calcium the correct order of Paramagnetism is? And why....

Answer»

In nitrogen, aluminium, oxygen, calcium the correct order of

Paramagnetism is? And why....

Discussion

24.	how to find atomic weight of cu?
Answer» how to find atomic weight of cu?

Discussion

25.	46. Find pH of solution formed by mixing 50ml of 0.1M NH3 and 10ml of 0.1M HCl. Assume pkb of NH3 to be x
Answer» 46. Find pH of solution formed by mixing 50ml of 0.1M NH3 and 10ml of 0.1M HCl. Assume pkb of NH3 to be x

Discussion

26.	which of the following is least reactive to noucleophlic reagent? A\rbrack. 1 chloro eth_1-ene B\rbrack 2 METHYL 2CHLORO PROPANE c\rbrack ethane chloride \{D\rbrack 1 chloro mistyped do not consider this particular bracket\} D\rbrack 3 chloro prop 1 ene D\rbrack
Answer» which of the following is least reactive to noucleophlic reagent? A\rbrack. 1 chloro eth_1-ene B\rbrack 2 METHYL 2CHLORO PROPANE c\rbrack ethane chloride \{D\rbrack 1 chloro mistyped do not consider this particular bracket\} D\rbrack 3 chloro prop 1 ene D\rbrack

Discussion

27.	18. Convert ethanol to butan -2-ol
Answer» 18. Convert ethanol to butan -2-ol

Discussion

28.	When photons of energy u fall on an aluminium plate, photoelectrons of maximum kinetic energy K are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be:
Answer» When photons of energy $u$ fall on an aluminium plate, photoelectrons of maximum kinetic energy K are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be:

Discussion

29.	The reaction given below, is observed to be a first order with rate constant 7.5×10−3 s−1. Calculate the time required for the total pressure in a system containing A at an initial pressure of 0.1 atm to rise to 0.145 atm. 2A(g)→4B(g)+C(g)
Answer» The reaction given below, is observed to be a first order with rate constant $7.5 \times 10^{- 3} s^{- 1}$ . Calculate the time required for the total pressure in a system containing A at an initial pressure of $0.1 a t m$ to rise to $0.145 a t m$ . $2 A (g) \to 4 B (g) + C (g)$

29.

The reaction given below, is observed to be a first order with rate constant 7.5×10−3 s−1. Calculate the time required for the total pressure in a system containing A at an initial pressure of 0.1 atm to rise to 0.145 atm. 2A(g)→4B(g)+C(g)

Answer»

The reaction given below, is observed to be a first order with rate constant $7.5 \times 10^{- 3} s^{- 1}$ . Calculate the time required for the total pressure in a system containing A at an initial pressure of $0.1 a t m$ to rise to $0.145 a t m$ .

$2 A (g) \to 4 B (g) + C (g)$

Discussion

30.	The chemical properties Depends upon the state of the substance moreover the rate of the chemical reaction depends upon the state of the substance. What does this means.
Answer» The chemical properties Depends upon the state of the substance moreover the rate of the chemical reaction depends upon the state of the substance. What does this means.

Discussion

31.	In the following reaction sequence X and Y are, respectively
Answer» In the following reaction sequence X and Y are, respectively

31.

In the following reaction sequence X and Y are, respectively

Answer»

In the following reaction sequence

X and Y are, respectively

Discussion

32.	Isopropyl alcohol is oxidized with K2Cr2O7 and H2SO4 to give :
Answer» Isopropyl alcohol is oxidized with $K_{2} C r_{2} O_{7} a n d H_{2} S O_{4}$ to give :

Discussion

33.	In Hall's process, the bauxite ore is reacted with:
Answer» In Hall's process, the bauxite ore is reacted with:

Discussion

34.	AgCl on fusion with sodium carbonate gives: (1) Ag2CO3 (2) Ag2O (3) Ag (4) Ag2C2
Answer» AgCl on fusion with sodium carbonate gives: (1) Ag2CO3 (2) Ag2O (3) Ag (4) Ag2C2

Discussion

35.	In certain solid, the oxide ions are arranged in ccp.Cations A occupy one sixth of the tetrahedral voids andcations B occupy one third of the octahedral voids.The probable formula of the compound is
Answer» In certain solid, the oxide ions are arranged in ccp.Cations A occupy one sixth of the tetrahedral voids andcations B occupy one third of the octahedral voids.The probable formula of the compound is

Discussion

36.	98 Which of the following alkanes upon dichlorination gives only two products 1) 2,2-Dimethylpropane 2) Propane 3) Methane 4) Cyclohexane
Answer» 98 Which of the following alkanes upon dichlorination gives only two products 1) 2,2-Dimethylpropane 2) Propane 3) Methane 4) Cyclohexane

Discussion

37.	The correct order of the decreasing ionic radii among the following isoelectronic species is
Answer» The correct order of the decreasing ionic radii among the following isoelectronic species is

Discussion

38.	The specific conductance of N10 KCl solution at 20∘C is 0.0212 ohm−1 cm−1 and the resistance of cell containing this solution at 20∘ C is 55 ohm. The cell constant is
Answer» The specific conductance of $\frac{N}{10} K C l$ solution at $20^{\circ} C$ is $0.0212 o h m^{- 1} c m^{- 1}$ and the resistance of cell containing this solution at $20^{\circ} C$ is 55 ohm. The cell constant is

Discussion

39.	68. Mechanism of fittig reaction and wurtz fittig reaction
Answer» 68. Mechanism of fittig reaction and wurtz fittig reaction

Discussion

40.	hat is the differentiation of d(2r) /dt
Answer» hat is the differentiation of d(2r) /dt

Discussion

41.	95 What is Schmidt reaction ?explain each step of the reaction.
Answer» 95 What is Schmidt reaction ?explain each step of the reaction.

Discussion

42.	a particle explodes into 3 fragments . its mass is 4m . two are each of mass m and velocity v respectively . all three are mutually perpendicular to each other find total energy of all three fragments
Answer» a particle explodes into 3 fragments . its mass is 4m . two are each of mass m and velocity v respectively . all three are mutually perpendicular to each other find total energy of all three fragments

Discussion

43.	Why Acylum ions show resonance?
Answer» Why Acylum ions show resonance?

Discussion

44.	Explain briefly how +2 state becomes more and more stable in the first half of the first row transition elements with increasing atomic number?
Answer» Explain briefly how +2 state becomes more and more stable in the first half of the first row transition elements with increasing atomic number?

Discussion

45.	A and B in the following reactions are:
Answer» A and B in the following reactions are:

Discussion

46.	Number of unshared electron pair in no2
Answer» Number of unshared electron pair in no2

Discussion

47.	The mole fraction of a solute in a solution is 0.1. At 298 K, molarity of this solution is the same as its molality. Density of this solution at 298 K is 2.0 cc. The ratio of the molecular weights of the solute and solvent, (MWsoluteMWsolvent), is ___
Answer» The mole fraction of a solute in a solution is 0.1. At 298 K, molarity of this solution is the same as its molality. Density of this solution at 298 K is 2.0 cc. The ratio of the molecular weights of the solute and solvent, $(\frac{M W_{s o l u t e}}{M W_{s o l v e n t}})$ , is ___

Discussion

48.	Account for the following (i) pKb of aniline is more than that of methyl amine. (ii) Ethylamine is soluble in water whereas aniline is not (iii) Methyl amine in water reacts with ferric chloride to precipitate hydrated ferric oxide (iv) Although amino group is o- and p- directing in aromatic electrophilic substitution, aniline on nitration gives a substantial amount of m-nitroaniline (v) Aniline does not undergo Friedel Crafts reaction (vi) Diazonium salts of aromatic amines are more stable than those of aliphatic amines (vii) Gabriel phthalimide synthesis is preferred for synthesising primary amines
Answer» Account for the following (i) $p K_{b}$ of aniline is more than that of methyl amine. (ii) Ethylamine is soluble in water whereas aniline is not (iii) Methyl amine in water reacts with ferric chloride to precipitate hydrated ferric oxide (iv) Although amino group is o- and p- directing in aromatic electrophilic substitution, aniline on nitration gives a substantial amount of m-nitroaniline (v) Aniline does not undergo Friedel Crafts reaction (vi) Diazonium salts of aromatic amines are more stable than those of aliphatic amines (vii) Gabriel phthalimide synthesis is preferred for synthesising primary amines

48.

Account for the following (i) pKb of aniline is more than that of methyl amine. (ii) Ethylamine is soluble in water whereas aniline is not (iii) Methyl amine in water reacts with ferric chloride to precipitate hydrated ferric oxide (iv) Although amino group is o- and p- directing in aromatic electrophilic substitution, aniline on nitration gives a substantial amount of m-nitroaniline (v) Aniline does not undergo Friedel Crafts reaction (vi) Diazonium salts of aromatic amines are more stable than those of aliphatic amines (vii) Gabriel phthalimide synthesis is preferred for synthesising primary amines

Answer»

Account for the following

(i) $p K_{b}$ of aniline is more than that of methyl amine.

(ii) Ethylamine is soluble in water whereas aniline is not

(iii) Methyl amine in water reacts with ferric chloride to precipitate hydrated ferric oxide

(iv) Although amino group is o- and p- directing in aromatic electrophilic substitution, aniline on nitration gives a substantial amount of m-nitroaniline

(v) Aniline does not undergo Friedel Crafts reaction

(vi) Diazonium salts of aromatic amines are more stable than those of aliphatic amines

(vii) Gabriel phthalimide synthesis is preferred for synthesising primary amines

Discussion

49.	The decomposition of A into product has values of K as 4.5×103s−1 at 10∘ C and energy of activation 60 kJ mol−1. At what temperature would K be 1.5×104s−1
Answer» The decomposition of A into product has values of K as $4.5 \times 10^{3} s^{- 1}$ at $10^{\circ} C$ and energy of activation $60 k J m o l^{- 1}$ . At what temperature would K be $1.5 \times 10^{4} s^{- 1}$

Discussion

50.	4. Molality of an aqueous solution of ethanol is 4m. What is the mole fraction of solute?
Answer» 4. Molality of an aqueous solution of ethanol is 4m. What is the mole fraction of solute?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In which element shielding effect is not possible ?

An element has face-centred cubic (fcc) structure with a cell edge of a. The distance between the centres of two nearest tetrahedral voids in the lattice is:

What is the density and temperature of Cross-linked polymers?

what is the concentration of Ba(CN)2 in the aqueous solution of the mixture of Ba(CN)2 and 0.1 M HCN having pH = 5. given; pKb for CN– at 25°C is 8 :-

A hydrocarbon with the minimum number of carbon atoms, capable of showing both geometrical and optical isomerism is (a) 3-methylpentene (b) 3-methylpent-2-ene (c) 4-methylhex-2-ene (d) 4-methylhept-3-ene

Consider thiol anion RS- and alkoxy anion RO- .Which of the following statements is correct?

Find the molality of the thiosulphate (Na2S2O3) solution, if the density of a 3 M thiosulphate (Na2S2O3) solution is 1.2 g/mL.

For Arrhenius equation, the intercept of the plot lnk vs 1T is:

What is the difference between isobutyl and secbutyl.

60. What is twistane

The product of the reaction between RCHO and NH2NH2 is

Column-I: Subshell Column-II: Number of spherical nodes Column-III: Radial plotThe only correct combination for the last electron of Cl− is:

Describe in brief about the phenomenon depicted in the image.

How does the lithium ion battery work and how does it gets charged?

How to calculate the packing efficiency in hexagonal cubic packaging.

3-Bromo-2-methylbutane reaction with NaOCH2CH3 give major product?

dπ-Pπ bond present in( explain with the structues) (1) (CO3)2- (2) (NO3)- (3) (PO4)3- (4) NO2)-

Which of the following has longest C−O bond length?(Free C−O bond length in CO is 1.128 oA)

21. What is a CGS Unit of Volume ?

Ka for butyric acid is 2.0×10−5. Calculate pH and hydroxyl ion concentration in 0.2 M aqueous solution of sodium butyrate.

One mole of an organic compound requires half mole of oxygen to give an acid. The compound may be

Compare the chemistry of actinoids with that of the lanthanoids with special reference to: (i) electronic configuration (iii) oxidation state (ii) atomic and ionic sizes and (iv) chemical reactivity.

In nitrogen, aluminium, oxygen, calcium the correct order of Paramagnetism is? And why....

how to find atomic weight of cu?

46. Find pH of solution formed by mixing 50ml of 0.1M NH3 and 10ml of 0.1M HCl. Assume pkb of NH3 to be x

which of the following is least reactive to noucleophlic reagent? A\rbrack. 1 chloro eth_1-ene B\rbrack 2 METHYL 2CHLORO PROPANE c\rbrack ethane chloride \{D\rbrack 1 chloro mistyped do not consider this particular bracket\} D\rbrack 3 chloro prop 1 ene D\rbrack

18. Convert ethanol to butan -2-ol

When photons of energy u fall on an aluminium plate, photoelectrons of maximum kinetic energy K are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be:

The reaction given below, is observed to be a first order with rate constant 7.5×10−3 s−1. Calculate the time required for the total pressure in a system containing A at an initial pressure of 0.1 atm to rise to 0.145 atm. 2A(g)→4B(g)+C(g)

The chemical properties Depends upon the state of the substance moreover the rate of the chemical reaction depends upon the state of the substance. What does this means. ​​​​

In the following reaction sequence X and Y are, respectively

Isopropyl alcohol is oxidized with K2Cr2O7 and H2SO4 to give :

In Hall's process, the bauxite ore is reacted with:

AgCl on fusion with sodium carbonate gives: (1) Ag2CO3 (2) Ag2O (3) Ag (4) Ag2C2

In certain solid, the oxide ions are arranged in ccp.Cations A occupy one sixth of the tetrahedral voids andcations B occupy one third of the octahedral voids.The probable formula of the compound is

98 Which of the following alkanes upon dichlorination gives only two products 1) 2,2-Dimethylpropane 2) Propane 3) Methane 4) Cyclohexane

The correct order of the decreasing ionic radii among the following isoelectronic species is

The specific conductance of N10 KCl solution at 20∘C is 0.0212 ohm−1 cm−1 and the resistance of cell containing this solution at 20∘ C is 55 ohm. The cell constant is

68. Mechanism of fittig reaction and wurtz fittig reaction

hat is the differentiation of d(2r) /dt

95 What is Schmidt reaction ?explain each step of the reaction.

a particle explodes into 3 fragments . its mass is 4m . two are each of mass m and velocity v respectively . all three are mutually perpendicular to each other find total energy of all three fragments

Why Acylum ions show resonance?

Explain briefly how +2 state becomes more and more stable in the first half of the first row transition elements with increasing atomic number?

A and B in the following reactions are:

Number of unshared electron pair in no2

The mole fraction of a solute in a solution is 0.1. At 298 K, molarity of this solution is the same as its molality. Density of this solution at 298 K is 2.0 cc. The ratio of the molecular weights of the solute and solvent, (MWsoluteMWsolvent), is ___

The decomposition of A into product has values of K as 4.5×103s−1 at 10∘ C and energy of activation 60 kJ mol−1. At what temperature would K be 1.5×104s−1

4. Molality of an aqueous solution of ethanol is 4m. What is the mole fraction of solute?

The chemical properties Depends upon the state of the substance moreover the rate of the chemical reaction depends upon the state of the substance. What does this means.