46295 + Interview Questions in Chemistry

1.	Although geometries of NH3 and H2O molecules are distorted tetrahedral, bond angle in water is less than that of ammonia. Discuss.
Answer» Although geometries of $N H_{3}$ and $H_{2} O$ molecules are distorted tetrahedral, bond angle in water is less than that of ammonia. Discuss.

Discussion

2.	what is the main difference between charge and electron and and what actually a charge in quantum physics
Answer» what is the main difference between charge and electron and and what actually a charge in quantum physics

Discussion

3.	(a) The conductivity of 0.001 mol L−1 solution of CH3COOH is 3.905×10−5S cm−1. Calculate its molar conductivity and degree of dissociation α. Given λ∘(H+)=349.6 S cm2 mol−1 and λ∘(CH3COO−)=40.9 S cm2 mol−1. (b) Define electrochemical cell. What happens if external potential applied becomes greater than E∘cell of electrochemical cell?
Answer» (a) The conductivity of 0.001 $m o l L^{- 1}$ solution of $C H_{3} C O O H$ is $3.905 \times 10^{- 5} S c m^{- 1}$ . Calculate its molar conductivity and degree of dissociation $α$ . Given $λ^{\circ} (H^{+}) = 349.6 S c m^{2} m o l^{- 1}$ and $λ^{\circ} (C H_{3} C O O^{-}) = 40.9 S c m^{2} m o l^{- 1}$ . (b) Define electrochemical cell. What happens if external potential applied becomes greater than $E_{c e l l}^{\circ}$ of electrochemical cell?

Discussion

4.	For the given reaction :R(i) O3−−−−−→(ii) H2OOnly one productHere R can be :
Answer» For the given reaction : $R (i) O_{3} - ---- \to (i i) H_{2} O Only one product$ Here R can be :

Discussion

5.	The free radical which is most stable is 1).C_2H_52)CH_2=CH-CH_2\cdot 3)(H_3C)_3C\cdot
Answer» The free radical which is most stable is 1).C_2H_52)CH_2=CH-CH_2\cdot 3)(H_3C)_3C\cdot

Discussion

6.	Consider the following statements :(i) With increase in dilution, molar conductance ofa weak electrolyte solution increases whereasspecific conductance decreases due todecrease in interionic attractions(ii) ∧m∞ for AgCl can be determined by extrapolationof the graph between ∧m and C(iii) For weak electrolytes, ∧m or ∧eq increasesrapidly with dilution in the lower concentrationrange.Choose the correct statement (s)(1) I, II, III (2) only III(3) I, II (4) II, III
Answer» Consider the following statements : (i) With increase in dilution, molar conductance of a weak electrolyte solution increases whereas specific conductance decreases due to decrease in interionic attractions (ii) ∧m∞ for AgCl can be determined by extrapolation of the graph between ∧m and C (iii) For weak electrolytes, ∧m or ∧eq increases rapidly with dilution in the lower concentration range. Choose the correct statement (s) (1) I, II, III (2) only III (3) I, II (4) II, III

Discussion

7.	atomic number.6.3 Jonization Enthalplesalkaline earth metals have low ionizationthalpies due to fairly large size of the atoms.ce the atomic size increases down theup, their ionization enthalpy decreasesble 10.2). The first ionisation enthalpies ofalkaline earth metals are higher than thosehe corresponding Group 1 metals. This isto their small size as compared to theesponding alkali metals. It is interestingote that the second ionisation enthalpiesy why inwritten largw size it should be smal
Answer» atomic number.6.3 Jonization Enthalplesalkaline earth metals have low ionizationthalpies due to fairly large size of the atoms.ce the atomic size increases down theup, their ionization enthalpy decreasesble 10.2). The first ionisation enthalpies ofalkaline earth metals are higher than thosehe corresponding Group 1 metals. This isto their small size as compared to theesponding alkali metals. It is interestingote that the second ionisation enthalpiesy why inwritten largw size it should be smal

Discussion

8.	When a 0.374 m of tetrachloroethane is added to benzene, the solution freezes at 3.55∘ C. Find the Kf of benzene? [Pure benzene freezes at 5.45o C]
Answer» When a $0.374 m$ of tetrachloroethane is added to benzene, the solution freezes at ${3.55}^{\circ} C$ . Find the $K_{f}$ of benzene? [Pure benzene freezes at ${5.45}^{o} C$ ]

Discussion

9.	In a calorimeter (water equivalent = 40 gm) are 200 gm of water and 50 gm of ice all at 0∘C. Into this is poured 30 gm of water at 90∘C. What will be the final condition of the system?
Answer» In a calorimeter (water equivalent = 40 gm) are 200 gm of water and 50 gm of ice all at $0^{\circ} C$ . Into this is poured 30 gm of water at $90^{\circ} C$ . What will be the final condition of the system?

Discussion

10.	The pH of 0.5 L of 1.0 M NaCl after the electrolysis for 965 s using 5.0 A current is
Answer» The $p H$ of $0.5 L$ of $1.0 M NaCl$ after the electrolysis for $965 s$ using $5.0 A$ current is

Discussion

11.	In FCC structure octahedral sites are present at:
Answer» In FCC structure octahedral sites are present at:

Discussion

12.	Good quality bleaching powder contains available chlorine about:
Answer» Good quality bleaching powder contains available chlorine about:

Discussion

13.	Why line spectrum of atoms is obtained?
Answer» Why line spectrum of atoms is obtained?

Discussion

14.	Black Jack is an ore of
Answer» Black Jack is an ore of

Discussion

15.	For PCl5(g)⇌PCl3(g)+Cl2(g), Write the expression for Kc?
Answer» For $P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g),$ Write the expression for $K_{c} ?$

Discussion

16.	Which of the following solutions in water will have the lowest vapour pressure
Answer» Which of the following solutions in water will have the lowest vapour pressure

Discussion

17.	Why halogens can't exhibit the +2 oxidation state?
Answer» Why halogens can't exhibit the +2 oxidation state?

Discussion

18.	Which reaction is used for the preparation of acetophenone?
Answer» Which reaction is used for the preparation of acetophenone?

Discussion

19.	There is octahedral arrangement then when we place third layer which is similar to first layer then octahedral arrangement will be occupied or not or we have to place third layer different so it will be occupied?
Answer» There is octahedral arrangement then when we place third layer which is similar to first layer then octahedral arrangement will be occupied or not or we have to place third layer different so it will be occupied?

Discussion

20.	Find total no of ether with moleculer formula C7H16O and also find total no. of structural isomer of molecular formula C5H10(cyclic Acyclic
Answer» Find total no of ether with moleculer formula C7H16O and also find total no. of structural isomer of molecular formula C5H10(cyclic Acyclic

Discussion

21.	Methanol on heating with salicylic acid and a few drops of conc. H2SO4 gives the smell of ( 1 ) Bitter almonds ( 2) Oil of wintergreen (3 ) Rotten eggs (4 ) Mustard oil
Answer» Methanol on heating with salicylic acid and a few drops of conc. H2SO4 gives the smell of ( 1 ) Bitter almonds ( 2) Oil of wintergreen (3 ) Rotten eggs (4 ) Mustard oil

Discussion

22.	Which of the following is/are examples of amphoteric oxide?
Answer» Which of the following is/are examples of amphoteric oxide?

Discussion

23.	What is the meaning of Thermodynamical controlled product and kinetically controlled product?
Answer» What is the meaning of Thermodynamical controlled product and kinetically controlled product?

Discussion

24.	What is the hybridization of i3 Negative Ion
Answer» What is the hybridization of i3 Negative Ion

Discussion

25.	8. Show resonance in tertiary benzylic and tertiary allylic in diagram
Answer» 8. Show resonance in tertiary benzylic and tertiary allylic in diagram

Discussion

26.	Find theprojection of the vectoronthe vector.
Answer» Find the projection of the vectoron the vector.

Discussion

27.	Acetamide reacts with NaOBr in alkaline medium to form:
Answer» Acetamide reacts with NaOBr in alkaline medium to form:

Discussion

28.	Which point equals to 13 on the number line.
Answer» Which point equals to $\frac{1}{3}$ on the number line.

Discussion

29.	35.which of the following pairs of gases will have identical rate of effusion under similar conditions? 1)Dideuterium and Helium 2)Diprotium and Dideuterium 3)Propene and Propane
Answer» 35.which of the following pairs of gases will have identical rate of effusion under similar conditions? 1)Dideuterium and Helium 2)Diprotium and Dideuterium 3)Propene and Propane

Discussion

30.	The metal calcium crystallizes in F.C.C unit cell with a = 600 pm. The density of metal if it contains 0.2% schottky deficits.
Answer» The metal calcium crystallizes in F.C.C unit cell with a = 600 pm. The density of metal if it contains $0.2 %$ schottky deficits.

Discussion

31.	Which is true about enzymes?
Answer» Which is true about enzymes?

Discussion

32.	Primary alcohols are obtained by the action of Grignard Reagent with
Answer» Primary alcohols are obtained by the action of Grignard Reagent with

Discussion

33.	How to write bond line structures for different orangic compounds
Answer» How to write bond line structures for different orangic compounds

Discussion

34.	What is polyester?
Answer» What is polyester?

Discussion

35.	The conjugate acid of NH−2 is
Answer» The conjugate acid of $N H_{2}^{-}$ is

Discussion

36.	CO2 crystallined into FCC. calculate numbr of atoms present in 1 unit cell of CO
Answer» CO2 crystallined into FCC. calculate numbr of atoms present in 1 unit cell of CO

Discussion

37.	Select the correct relation.
Answer» Select the correct relation.

Discussion

38.	Open refrigerator makes the surrounding more hot. WHY?
Answer» Open refrigerator makes the surrounding more hot. WHY?

Discussion

39.	Which of the following pairs of species has the same bond order?
Answer» Which of the following pairs of species has the same bond order?

Discussion

40.	32g of O2 diffuses in 5 seconds then calculate the mass of SO3 will diffuse in 10 seconds
Answer» 32g of O2 diffuses in 5 seconds then calculate the mass of SO3 will diffuse in 10 seconds

Discussion

41.	The color of KMnO4 is due to:
Answer» The color of $K M n O_{4}$ is due to:

Discussion

42.	At 500 K, 0.10 mole of PCl5 are heated in a 8.2 L flask. The pressure of equilibrium mixture is found to be 0.1 atm. Calculate Kp(in atm) for the reaction.PCl5(g)⇌PCl3(g)+Cl2(g)Given: R=0.082 L atm K−1 mol−1
Answer» At $500 K$ , $0.10$ mole of $P C l_{5}$ are heated in a $8.2 L$ flask. The pressure of equilibrium mixture is found to be $0.1 a t m$ . Calculate $K_{p} (i n a t m)$ for the reaction. $P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)$ $G i v e n : R = 0.082 {L atm K}^{- 1} m o l^{- 1}$

Discussion

43.	20 g of solvent containing 0.25 g of solute (mol. mass 122 g/mol) freezes at 0.3∘C below the freezing point of pure solvent. If the solvent exists as dimer in the solvent, find its degree of association. (Kf)solvent=5.12 K kg−1 mol−1
Answer» $20 g$ of solvent containing $0.25 g$ of solute (mol. mass 122 g/mol) freezes at ${0.3}^{\circ} C$ below the freezing point of pure solvent. If the solvent exists as dimer in the solvent, find its degree of association. $(K_{f})_{solvent} = 5.12 K k g^{- 1} m o l^{- 1}$

Discussion

44.	Reaction in which reactants give products but products do not give back reactants under the same condition is:
Answer» Reaction in which reactants give products but products do not give back reactants under the same condition is:

Discussion

45.	8. H2S gas is used in qualitative analysisi of inorganications. Its solubility in water at STP is 0.195 mol /kg. Thus Henry's constant for h2s is (in atom)
Answer» 8. H2S gas is used in qualitative analysisi of inorganications. Its solubility in water at STP is 0.195 mol /kg. Thus Henry's constant for h2s is (in atom)

Discussion

46.	Which of the following reaction can produce 1o amine as major product?
Answer» Which of the following reaction can produce $1^{o}$ amine as major product?

Discussion

47.	What is the increase in entropy when 11.2 L of O2 are mixed with 11.2 L of H2 at STP
Answer» What is the increase in entropy when 11.2 L of O2 are mixed with 11.2 L of H2 at STP

Discussion

48.	What is the Anomalous Position of Hydrogen ?
Answer» What is the Anomalous Position of Hydrogen ?

Discussion

49.	61 How to find number of resonating structures of compounds have functional groups bonded with benzene ring.
Answer» 61 How to find number of resonating structures of compounds have functional groups bonded with benzene ring.

Discussion

50.	24. What is coordination isomerism?explain
Answer» 24. What is coordination isomerism?explain

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Although geometries of NH3 and H2O molecules are distorted tetrahedral, bond angle in water is less than that of ammonia. Discuss.

what is the main difference between charge and electron and and what actually a charge in quantum physics

For the given reaction :R(i) O3−−−−−→(ii) H2OOnly one productHere R can be :

The free radical which is most stable is 1).C_2H_52)CH_2=CH-CH_2\cdot 3)(H_3C)_3C\cdot

When a 0.374 m of tetrachloroethane is added to benzene, the solution freezes at 3.55∘ C. Find the Kf of benzene? [Pure benzene freezes at 5.45o C]

In a calorimeter (water equivalent = 40 gm) are 200 gm of water and 50 gm of ice all at 0∘C. Into this is poured 30 gm of water at 90∘C. What will be the final condition of the system?

The pH of 0.5 L of 1.0 M NaCl after the electrolysis for 965 s using 5.0 A current is

In FCC structure octahedral sites are present at:

Good quality bleaching powder contains available chlorine about:

Why line spectrum of atoms is obtained?

Black Jack is an ore of

For PCl5(g)⇌PCl3(g)+Cl2(g), Write the expression for Kc?

Which of the following solutions in water will have the lowest vapour pressure

Why halogens can't exhibit the +2 oxidation state?

Which reaction is used for the preparation of acetophenone?

There is octahedral arrangement then when we place third layer which is similar to first layer then octahedral arrangement will be occupied or not or we have to place third layer different so it will be occupied?

Find total no of ether with moleculer formula C7H16O and also find total no. of structural isomer of molecular formula C5H10(cyclic Acyclic

Methanol on heating with salicylic acid and a few drops of conc. H2SO4 gives the smell of ( 1 ) Bitter almonds ( 2) Oil of wintergreen (3 ) Rotten eggs (4 ) Mustard oil

Which of the following is/are examples of amphoteric oxide?

What is the meaning of Thermodynamical controlled product and kinetically controlled product?

What is the hybridization of i3 Negative Ion

8. Show resonance in tertiary benzylic and tertiary allylic in diagram

Find theprojection of the vectoronthe vector.

Acetamide reacts with NaOBr in alkaline medium to form:

Which point equals to 13 on the number line.

35.which of the following pairs of gases will have identical rate of effusion under similar conditions? 1)Dideuterium and Helium 2)Diprotium and Dideuterium 3)Propene and Propane

The metal calcium crystallizes in F.C.C unit cell with a = 600 pm. The density of metal if it contains 0.2% schottky deficits.

Which is true about enzymes?

Primary alcohols are obtained by the action of Grignard Reagent with

How to write bond line structures for different orangic compounds

What is polyester?

The conjugate acid of NH−2 is

CO2 crystallined into FCC. calculate numbr of atoms present in 1 unit cell of CO

Select the correct relation.

Open refrigerator makes the surrounding more hot. WHY?

Which of the following pairs of species has the same bond order?

32g of O2 diffuses in 5 seconds then calculate the mass of SO3 will diffuse in 10 seconds

The color of KMnO4 is due to:

At 500 K, 0.10 mole of PCl5 are heated in a 8.2 L flask. The pressure of equilibrium mixture is found to be 0.1 atm. Calculate Kp(in atm) for the reaction.PCl5(g)⇌PCl3(g)+Cl2(g)Given: R=0.082 L atm K−1 mol−1

20 g of solvent containing 0.25 g of solute (mol. mass 122 g/mol) freezes at 0.3∘C below the freezing point of pure solvent. If the solvent exists as dimer in the solvent, find its degree of association. (Kf)solvent=5.12 K kg−1 mol−1

Reaction in which reactants give products but products do not give back reactants under the same condition is:

8. H2S gas is used in qualitative analysisi of inorganications. Its solubility in water at STP is 0.195 mol /kg. Thus Henry's constant for h2s is (in atom)

Which of the following reaction can produce 1o amine as major product?

What is the increase in entropy when 11.2 L of O2 are mixed with 11.2 L of H2 at STP

What is the Anomalous Position of Hydrogen ?

61 How to find number of resonating structures of compounds have functional groups bonded with benzene ring.

24. What is coordination isomerism?explain