46295 + Interview Questions in Chemistry

1.	3. What is the formula to be used to find hybridisation of a molecule ?
Answer» 3. What is the formula to be used to find hybridisation of a molecule ?

Discussion

2.	Which of the following reactions occur during calcination?
Answer» Which of the following reactions occur during calcination?

Discussion

3.	The length of the unit cell edge of a bcc lattice metal is 350 pm. What is the volume of atoms in one mole of the metal?
Answer» The length of the unit cell edge of a bcc lattice metal is $350 p m$ . What is the volume of atoms in one mole of the metal?

Discussion

4.	If A'∪ B'=U , then show that A⊂
Answer» If A'∪ B'=U , then show that A⊂

Discussion

5.	Which of the following is/are the best reagent(s) for the electrophilic nitration of benzene?
Answer» Which of the following is/are the best reagent(s) for the electrophilic nitration of benzene?

Discussion

6.	19. In a solution between (CH3)2NH and(CH3)3N which one is more basic and WHY
Answer» 19. In a solution between (CH3)2NH and(CH3)3N which one is more basic and WHY

Discussion

7.	Correct order of Bond Angle is 1)F2O>H2O>O3 2)O3>H2O >F2O 3)H2O
Answer» Correct order of Bond Angle is 1)F2O>H2O>O3 2)O3>H2O >F2O 3)H2O

Discussion

8.	The molecule having T-shape is:
Answer» The molecule having T-shape is:

Discussion

9.	according to Bravias lattices, a hexagonal unit cell can have only a primitive lattice. but we see the hexagonal closed pack lattice where the atoms are also at places other than corner, which is not a primitive unit cell by definition, since a primitive unit cell can have the atoms ONLY at corners, but hcp has 3 atoms in between too. then why is the hcp considered as a primitive unit cell?
Answer» according to Bravias lattices, a hexagonal unit cell can have only a primitive lattice. but we see the hexagonal closed pack lattice where the atoms are also at places other than corner, which is not a primitive unit cell by definition, since a primitive unit cell can have the atoms ONLY at corners, but hcp has 3 atoms in between too. then why is the hcp considered as a primitive unit cell?

Discussion

10.	14.Why beryllium conducts electricity better than lithium. Explain
Answer» 14.Why beryllium conducts electricity better than lithium. Explain

Discussion

11.	Why fourine atoms are not placed at equatorial position in the structure of pcl2f3
Answer» Why fourine atoms are not placed at equatorial position in the structure of pcl2f3

Discussion

12.	Which of the following is expected to have a dipole moment of zero?
Answer» Which of the following is expected to have a dipole moment of zero?

Discussion

13.	Question 13You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice.Explain why these sour substances are effective in cleaning the vessels.
Answer» Question 13 You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.

Discussion

14.	What do you understand by fuel efficiency?
Answer» What do you understand by fuel efficiency?

Discussion

15.	Alkene form trialkyl borane and Alkynes form dialkyl borane on rx. with B2H6/H2O2 respectively. Is the statement true
Answer» Alkene form trialkyl borane and Alkynes form dialkyl borane on rx. with B2H6/H2O2 respectively. Is the statement true

Discussion

16.	For a d electron, the orbital angular momentum is:
Answer» For a d electron, the orbital angular momentum is:

Discussion

17.	47. Differene btw HCB and BHC
Answer» 47. Differene btw HCB and BHC

Discussion

18.	Calculate enthalpy change (in kcal) in adibatic compression of 5 moles ideal triatomic non-linear gas against a constant external pressure of 2 atm starting from initial pressure of 1 atm and initial temperature of 300 K: (Given R= 2 cal/mol.K and vibrational degrees of freedom are inactive)
Answer» Calculate enthalpy change (in kcal) in adibatic compression of 5 moles ideal triatomic non-linear gas against a constant external pressure of $2 a t m$ starting from initial pressure of $1 a t m$ and initial temperature of $300 K$ : (Given R= 2 cal/mol.K and vibrational degrees of freedom are inactive)

Discussion

19.	What are branched and unbranched and difference between alpha linkage beta linkage?
Answer» What are branched and unbranched and difference between alpha linkage beta linkage?

Discussion

20.	Dry air was successively passed through a solution of 5g solute in 80 g water and then through pure water. The loss in weight of solution was 2.5g and that of pure water was 0.04g. The mol. wt. of solute is
Answer» Dry air was successively passed through a solution of 5g solute in 80 g water and then through pure water. The loss in weight of solution was 2.5g and that of pure water was 0.04g. The mol. wt. of solute is

Discussion

21.	4 moles of ammonia on reaction with 3 moles of calcium hypochlorite gives a salt (B), a gas (C) and water. Gas (C) on reaction with calcium gives compound (D) which on hydrolysis gives ammonia again . Identify (B), (C) and (D).
Answer» 4 moles of ammonia on reaction with 3 moles of calcium hypochlorite gives a salt $(B)$ , a gas (C) and water. Gas $(C)$ on reaction with calcium gives compound $(D)$ which on hydrolysis gives ammonia again . Identify $(B)$ , $(C)$ and $(D)$ .

Discussion

22.	Photon having wavelength 310 nm is used to break the bond of A2 molecule having bond energy 288 kJmol−1, the % energy of photon converted to kinetic energy is:(hc=12400 eV∘A , 1eV=96 kJ/mol)
Answer» Photon having wavelength $310 nm$ is used to break the bond of $A_{2}$ molecule having bond energy $288 {kJmol}^{- 1}$ , the $%$ energy of photon converted to kinetic energy is: $(h c = 12400 e V \circ A$ , $1 e V = 96 kJ/mol)$

Discussion

23.	Which is incorrect statement in respect to Mendeleev's periodic table?
Answer» Which is incorrect statement in respect to Mendeleev's periodic table?

Discussion

24.	110.1 L of an ideal gas( Y=1.5) at 300 K is suddenly compressed to half of its original volume.Original pressure is 100 kPa.The gas is now expanded isothermally to achieve its original volume of 1 L.Calculate the work done by the gas?
Answer» 110.1 L of an ideal gas( Y=1.5) at 300 K is suddenly compressed to half of its original volume.Original pressure is 100 kPa.The gas is now expanded isothermally to achieve its original volume of 1 L.Calculate the work done by the gas?

Discussion

25.	A thermally insulating cylinder has a thermally insulating and frictionless movable partition in the middle, as shown in the figure below. On each side of the partition, there is one mole of an ideal gas, with specific heat at constant volume, Cv=2R . Here, R is the gas constant. Initially, each side has a volume V0 and temperature T0. The left side has an electric heater, which is turned on at very low power to transfer heat Q to the gas on the left side. As a result the partition moves slowly towards the right reducing the right side volume to V0/2. Consequently, the gas temperatures on the left and the right sides become TL and TR, respectively. Ignore the changes in the temperatures of the cylinder, heater and the partition.The value of TRT0 is
Answer» A thermally insulating cylinder has a thermally insulating and frictionless movable partition in the middle, as shown in the figure below. On each side of the partition, there is one mole of an ideal gas, with specific heat at constant volume, $C_{v} = 2 R$ . Here, $R$ is the gas constant. Initially, each side has a volume $V_{0}$ and temperature $T_{0}$ . The left side has an electric heater, which is turned on at very low power to transfer heat $Q$ to the gas on the left side. As a result the partition moves slowly towards the right reducing the right side volume to $V_{0} / 2$ . Consequently, the gas temperatures on the left and the right sides become $T_{L}$ and $T_{R}$ , respectively. Ignore the changes in the temperatures of the cylinder, heater and the partition. The value of $\frac{T_{R}}{T_{0}}$ is

Discussion

26.	How many sigma bonds are there in P4O10?12017\rbrack(a) 4(c) 12(b) 8(d) 16
Answer» How many sigma bonds are there in P4O10?12017\rbrack(a) 4(c) 12(b) 8(d) 16

Discussion

27.	How many monochloro products are possible for 1,1-Dimethyl cyclopentane excluding isomers?
Answer» How many monochloro products are possible for 1,1-Dimethyl cyclopentane excluding isomers?

Discussion

28.	2 moles of PCl5 were heated in a closed vessel of 2 litre capacity. At equilibrium, 40% of PCl5 is dissociated into PCl3 and Cl2. The value of equilibrium constant is
Answer» 2 moles of $P C l_{5}$ were heated in a closed vessel of 2 litre capacity. At equilibrium, 40% of $P C l_{5}$ is dissociated into $P C l_{3}$ and $C l_{2}$ . The value of equilibrium constant is

28.

2 moles of PCl5 were heated in a closed vessel of 2 litre capacity. At equilibrium, 40% of PCl5 is dissociated into PCl3 and Cl2. The value of equilibrium constant is

Answer»

2 moles of $P C l_{5}$ were heated in a closed vessel of 2 litre capacity. At equilibrium, 40% of $P C l_{5}$ is dissociated into $P C l_{3}$ and $C l_{2}$ . The value of equilibrium constant is

Discussion

29.	The work done during the expansion of a gas from a volume of 4 dm3 to 6 dm3 against a constant external pressure of 3 atm is (1 L atm = 101.32 J)
Answer» The work done during the expansion of a gas from a volume of $4 {dm}^{3}$ to $6 {dm}^{3}$ against a constant external pressure of $3 atm$ is $(1 L atm = 101.32 J)$

Discussion

30.	In which reaction does CO2 gas not evolve?
Answer» In which reaction does $C O_{2}$ gas not evolve?

Discussion

31.	a man can row 15km/h in still water. if it takes him twice as long to row upstream as to row downstream the river, then speed of water is_______________.
Answer» a man can row 15km/h in still water. if it takes him twice as long to row upstream as to row downstream the river, then speed of water is_______________.

Discussion

32.	22. On which carbon electron density is maximum in pyrole and how ?
Answer» 22. On which carbon electron density is maximum in pyrole and how ?

Discussion

33.	The cell Pt, H2(g)(1 atm )/H+,pH=x\|\| Normal calomel electrode has emf of 0.67 V at 25∘ C. The oxidation potential of calomel electrode on H scale is −0.28 V, then pH of solution will be(Given : 2.303RTF=0.0591 V)
Answer» The cell $P t, H_{2 (g)} (1 atm) / H^{+}, p H = x \| \|$ Normal calomel electrode has emf of $0.67 V$ at $25^{\circ} C$ . The oxidation potential of calomel electrode on H scale is $- 0.28 V$ , then $p H$ of solution will be (Given : $\frac{2.303 R T}{F} = 0.0591 V$ )

Discussion

34.	Identify the gas which is readily adsorbed by activated charcoal?
Answer» Identify the gas which is readily adsorbed by activated charcoal?

Discussion

35.	Which amongst the following represents the correct order of covalent nature?
Answer» Which amongst the following represents the correct order of covalent nature?

Discussion

36.	2 The standard half reduction potential of Ag+\|Ag is 0.79V is 25^° C. Given the experimental value Ksp=1.5 10*-10 for AgCl, calculate the standard half cell reduction potential for the Ag\|AgCl electrode. 1) 0.21 V 2) -0.21 V 3) -1.21V 4) 1.21V
Answer» 2 The standard half reduction potential of Ag+\|Ag is 0.79V is 25^° C. Given the experimental value Ksp=1.5 10*-10 for AgCl, calculate the standard half cell reduction potential for the Ag\|AgCl electrode. 1) 0.21 V 2) -0.21 V 3) -1.21V 4) 1.21V

Discussion

37.	When BrO−3 ion reacts with Br− in acid medium, Br2 is liberated. If the molecular weight of Br2 is M, then the equivalent weight of Br2 in this reaction is:
Answer» When $B r O_{3}^{-}$ ion reacts with $B r^{-}$ in acid medium, $B r_{2}$ is liberated. If the molecular weight of $B r_{2}$ is $M$ , then the equivalent weight of $B r_{2}$ in this reaction is:

Discussion

38.	{ Ex-IO. For acetic acid }(CH_3CO_2H) : }} (a) Draw three resonance structures; } (b) draw a structure for the resonance hybrids; } (c) rank the three resonance structures and the resonance hybrid in order } of increasing energy.
Answer» { Ex-IO. For acetic acid }(CH_3CO_2H) : }} (a) Draw three resonance structures; } (b) draw a structure for the resonance hybrids; } (c) rank the three resonance structures and the resonance hybrid in order } of increasing energy.

Discussion

39.	Which of the following is the correct decreasing order of bond angles?
Answer» Which of the following is the correct decreasing order of bond angles?

Discussion

40.	(CH_3)_3CMgCl on reaction with }D_2O produces explai
Answer» (CH_3)_3CMgCl on reaction with }D_2O produces explai

Discussion

41.	Na and Mg crystallize in bcc and fcc type crystals respectively. The number of ions of Na and Mg present in the unit cell of their respective crystal is:
Answer» $N a$ and $M g$ crystallize in bcc and fcc type crystals respectively. The number of ions of $N a$ and $M g$ present in the unit cell of their respective crystal is:

Discussion

42.	Replacement of chlorine from chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene is readily replaced because
Answer» Replacement of chlorine from chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene is readily replaced because

Discussion

43.	Which of the following options represents the correct bond order?
Answer» Which of the following options represents the correct bond order?

Discussion

44.	19. What will be molarity of Cl- when equal volume of 0.5M AgNO3 solution and 0.5M NaCl solution are mixed?
Answer» 19. What will be molarity of Cl- when equal volume of 0.5M AgNO3 solution and 0.5M NaCl solution are mixed?

Discussion

45.	The average concentration of So2 in the atoms over a city on a certain day is 10ppm when the average temperature is 298K.Given that the solubility of So2 in water at 298K is 1.3653 moles per litre and the Pka of H2SO3 is 1.92 estimate the ph of rain on that day.
Answer» The average concentration of So2 in the atoms over a city on a certain day is 10ppm when the average temperature is 298K.Given that the solubility of So2 in water at 298K is 1.3653 moles per litre and the Pka of H2SO3 is 1.92 estimate the ph of rain on that day.

Discussion

46.	The voltage (E0) developed across a glass electrode for pH measurement is related to the temperature (T) by the relation
Answer» The voltage $(E_{0})$ developed across a glass electrode for pH measurement is related to the temperature (T) by the relation

Discussion

47.	A wave pulse on a string has the dimension shown in figure. The wave speed is v = 1 cm/s. If the right end of the string is a free end. The shape of wave at time t = 3s is :
Answer» A wave pulse on a string has the dimension shown in figure. The wave speed is v = 1 cm/s. If the right end of the string is a free end. The shape of wave at time t = 3s is :

Discussion

48.	A solute A dimerizes in water. The boiling point of a 2 molal solution of A is 100.52 ºC. The percentage association of A is________.(Round off to the nearest integer.)[Use : Kb for water = 0.52 K kg mol−1 Boiling point of water = 100 ºC]
Answer» A solute A dimerizes in water. The boiling point of a 2 molal solution of A is 100.52 ºC. The percentage association of A is________.(Round off to the nearest integer.) [Use : $K_{b}$ for water = $0.52 K k g m o l^{- 1}$ Boiling point of water = 100 ºC]

Discussion

49.	The amount of zn required to produce 224ml h2 at STP on treatment with diluted h2so4 will be.
Answer» The amount of zn required to produce 224ml h2 at STP on treatment with diluted h2so4 will be.

Discussion

50.	Saytzuff ruleWurtz reaction
Answer» Saytzuff rule Wurtz reaction

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

3. What is the formula to be used to find hybridisation of a molecule ?

Which of the following reactions occur during calcination?

The length of the unit cell edge of a bcc lattice metal is 350 pm. What is the volume of atoms in one mole of the metal?

If A'∪ B'=U , then show that A⊂

Which of the following is/are the best reagent(s) for the electrophilic nitration of benzene?

19. In a solution between (CH3)2NH and(CH3)3N which one is more basic and WHY

Correct order of Bond Angle is 1)F2O>H2O>O3 2)O3>H2O >F2O 3)H2O

The molecule having T-shape is:

14.Why beryllium conducts electricity better than lithium. Explain

Why fourine atoms are not placed at equatorial position in the structure of pcl2f3

Which of the following is expected to have a dipole moment of zero?

Question 13You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice.Explain why these sour substances are effective in cleaning the vessels.

What do you understand by fuel efficiency?

Alkene form trialkyl borane and Alkynes form dialkyl borane on rx. with B2H6/H2O2 respectively. Is the statement true

For a d electron, the orbital angular momentum is:

47. Differene btw HCB and BHC

Calculate enthalpy change (in kcal) in adibatic compression of 5 moles ideal triatomic non-linear gas against a constant external pressure of 2 atm starting from initial pressure of 1 atm and initial temperature of 300 K: (Given R= 2 cal/mol.K and vibrational degrees of freedom are inactive)

What are branched and unbranched and difference between alpha linkage beta linkage?

Dry air was successively passed through a solution of 5g solute in 80 g water and then through pure water. The loss in weight of solution was 2.5g and that of pure water was 0.04g. The mol. wt. of solute is

4 moles of ammonia on reaction with 3 moles of calcium hypochlorite gives a salt (B), a gas (C) and water. Gas (C) on reaction with calcium gives compound (D) which on hydrolysis gives ammonia again . Identify (B), (C) and (D).

Photon having wavelength 310 nm is used to break the bond of A2 molecule having bond energy 288 kJmol−1, the % energy of photon converted to kinetic energy is:(hc=12400 eV∘A , 1eV=96 kJ/mol)

Which is incorrect statement in respect to Mendeleev's periodic table?

110.1 L of an ideal gas( Y=1.5) at 300 K is suddenly compressed to half of its original volume.Original pressure is 100 kPa.The gas is now expanded isothermally to achieve its original volume of 1 L.Calculate the work done by the gas?

How many sigma bonds are there in P4O10?12017\rbrack(a) 4(c) 12(b) 8(d) 16

How many monochloro products are possible for 1,1-Dimethyl cyclopentane excluding isomers?

2 moles of PCl5 were heated in a closed vessel of 2 litre capacity. At equilibrium, 40% of PCl5 is dissociated into PCl3 and Cl2. The value of equilibrium constant is

The work done during the expansion of a gas from a volume of 4 dm3 to 6 dm3 against a constant external pressure of 3 atm is (1 L atm = 101.32 J)

In which reaction does CO2 gas not evolve?

a man can row 15km/h in still water. if it takes him twice as long to row upstream as to row downstream the river, then speed of water is_______________.

22. On which carbon electron density is maximum in pyrole and how ?

The cell Pt, H2(g)(1 atm )/H+,pH=x|| Normal calomel electrode has emf of 0.67 V at 25∘ C. The oxidation potential of calomel electrode on H scale is −0.28 V, then pH of solution will be(Given : 2.303RTF=0.0591 V)

Identify the gas which is readily adsorbed by activated charcoal?

Which amongst the following represents the correct order of covalent nature?

2 The standard half reduction potential of Ag+|Ag is 0.79V is 25^° C. Given the experimental value Ksp=1.5 10*-10 for AgCl, calculate the standard half cell reduction potential for the Ag|AgCl electrode. 1) 0.21 V 2) -0.21 V 3) -1.21V 4) 1.21V

When BrO−3 ion reacts with Br− in acid medium, Br2 is liberated. If the molecular weight of Br2 is M, then the equivalent weight of Br2 in this reaction is:

{ Ex-IO. For acetic acid }(CH_3CO_2H) : }} (a) Draw three resonance structures; } (b) draw a structure for the resonance hybrids; } (c) rank the three resonance structures and the resonance hybrid in order } of increasing energy.

Which of the following is the correct decreasing order of bond angles?

(CH_3)_3CMgCl on reaction with }D_2O produces explai

Na and Mg crystallize in bcc and fcc type crystals respectively. The number of ions of Na and Mg present in the unit cell of their respective crystal is:

Replacement of chlorine from chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene is readily replaced because

Which of the following options represents the correct bond order?

19. What will be molarity of Cl- when equal volume of 0.5M AgNO3 solution and 0.5M NaCl solution are mixed?

The average concentration of So2 in the atoms over a city on a certain day is 10ppm when the average temperature is 298K.Given that the solubility of So2 in water at 298K is 1.3653 moles per litre and the Pka of H2SO3 is 1.92 estimate the ph of rain on that day.

The voltage (E0) developed across a glass electrode for pH measurement is related to the temperature (T) by the relation

A wave pulse on a string has the dimension shown in figure. The wave speed is v = 1 cm/s. If the right end of the string is a free end. The shape of wave at time t = 3s is :

A solute A dimerizes in water. The boiling point of a 2 molal solution of A is 100.52 ºC. The percentage association of A is________.(Round off to the nearest integer.)[Use : Kb for water = 0.52 K kg mol−1 Boiling point of water = 100 ºC]

The amount of zn required to produce 224ml h2 at STP on treatment with diluted h2so4 will be.

Saytzuff ruleWurtz reaction