46295 + Interview Questions in Chemistry

1.	For the gas-phase decomposition PCl5(g)△⇌PCl3(g)+Cl2(g):
Answer» For the gas-phase decomposition $P C l_{5} (g) △ ⇌ P C l_{3} (g) + C l_{2} (g) :$

Discussion

2.	An ideal gas is taken from point A to point C on P-V diagram through two process AOC and ABC as shown in the figure. Process AOC is isothermal
Answer» An ideal gas is taken from point A to point C on P-V diagram through two process AOC and ABC as shown in the figure. Process AOC is isothermal

Discussion

3.	One mole of anhydrous MgCl2 dissolves in water and librates 25 cal.mol−1 of heat. ΔHhydration of MgCl2=−30 cal.mol−1 The lattice energy of MgCl2 is:
Answer» One mole of anhydrous $M g C l_{2}$ dissolves in water and librates $25 {cal.mol}^{- 1}$ of heat. $Δ H_{hydration} o f M g C l_{2} = - 30 {cal.mol}^{- 1}$ The lattice energy of $M g C l_{2}$ is:

Discussion

4.	For a first order process A----->B, rate constant k1=0.693min-1&another first order process C---->D, k2=x min-1.If 99% of C--->D requires time same as 50% of reaction A---->B, value of x?
Answer» For a first order process A----->B, rate constant k1=0.693min-1&another first order process C---->D, k2=x min-1.If 99% of C--->D requires time same as 50% of reaction A---->B, value of x?

Discussion

5.	Determine change in enthalpy for the following process:- 0.2 equivalent of acid combines with 0.5 equivalent of base.
Answer» Determine change in enthalpy for the following process:- 0.2 equivalent of acid combines with 0.5 equivalent of base.

Discussion

6.	Why does 'backside attack' occur in SN² reactions?
Answer» Why does 'backside attack' occur in SN² reactions?

Discussion

7.	The solubility of a gas in water which is exposed to the atmosphere, when the partial pressure is 700 mm is 1.4×10−4M. What is the solubility of the gas at 760 mm and at same temperature?
Answer» The solubility of a gas in water which is exposed to the atmosphere, when the partial pressure is 700 mm is $1.4 \times 10^{- 4} M$ . What is the solubility of the gas at 760 mm and at same temperature?

Discussion

8.	Find the major product 'S'.
Answer» Find the major product 'S'.

Discussion

9.	Which of the following has a dipole moment of zero?
Answer» Which of the following has a dipole moment of zero?

Discussion

10.	Two closed bulbs of equal volumes (V) containing an ideal gas initially at pressure pi and temperature T1 are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to T2. The final pressure pf is:
Answer» Two closed bulbs of equal volumes (V) containing an ideal gas initially at pressure $p_{i}$ and temperature $T_{1}$ are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to $T_{2}$ . The final pressure $p_{f}$ is:

Discussion

11.	Consider the following cell reaction :2Fe(s)+O2(g)+4H+(aq)→2Fe2+(aq)+2H2O(I);E0=1.67 VAt [Fe2+=10−3M,P(O)2=0.1 atm and pH=3, the cell potential at 25∘ C is
Answer» Consider the following cell reaction : $2 F e (s) + O_{2} (g) + 4 H^{+} (a q) \to 2 F e^{2 +} (a q) + 2 H_{2} O (I); E^{0} = 1.67 V$ At $[F e^{2 +} = 10^{- 3} M, P (O)_{2} = 0.1 a t m and p H = 3,$ the cell potential at $25^{\circ} C$ is

Discussion

12.	Forthe (positron) emission from a nucleus, there is another competingprocess known as electron capture (electron from an inner orbit, say,the K−shell, is captured by the nucleus and a neutrino isemitted).Showthat if emission is energetically allowed, electron capture is necessarilyallowed but not vice−versa.
Answer» For the (positron) emission from a nucleus, there is another competing process known as electron capture (electron from an inner orbit, say, the K−shell, is captured by the nucleus and a neutrino is emitted). Show that if emission is energetically allowed, electron capture is necessarily allowed but not vice−versa.

12.

Forthe (positron) emission from a nucleus, there is another competingprocess known as electron capture (electron from an inner orbit, say,the K−shell, is captured by the nucleus and a neutrino isemitted).Showthat if emission is energetically allowed, electron capture is necessarilyallowed but not vice−versa.

Answer»

For
the

(positron) emission from a nucleus, there is another competing
process known as electron capture (electron from an inner orbit, say,
the K−shell, is captured by the nucleus and a neutrino is
emitted).

Show
that if

emission is energetically allowed, electron capture is necessarily
allowed but not vice−versa.

Discussion

13.	What is the exact difference between heat, energy, temperature and work?
Answer» What is the exact difference between heat, energy, temperature and work?

Discussion

14.	Give any three usage of sulphuric acid.
Answer» Give any three usage of sulphuric acid.

Discussion

15.	50.What wil be formed when 1-PHENYL PROPENE is reacted with HBr in the presence of organic peroxide? ( SHOW THE MECHANISM OF THE REACTION ) A) 1-CHLORO, 1-PHENYL PROPANE B) 2-CHLORO, 1-PHENYL PROPANE
Answer» 50.What wil be formed when 1-PHENYL PROPENE is reacted with HBr in the presence of organic peroxide? ( SHOW THE MECHANISM OF THE REACTION ) A) 1-CHLORO, 1-PHENYL PROPANE B) 2-CHLORO, 1-PHENYL PROPANE

Discussion

16.	89The strongest oxidizing agent among the folowingis(1) CIO4-(2) IO4-(4) Bro4-(3) HS
Answer» 89The strongest oxidizing agent among the folowingis(1) CIO4-(2) IO4-(4) Bro4-(3) HS

Discussion

17.	87. if an element X forms a covalent hydride in which hydrogen is two percent by weight then equivalent mass of element X in the hydride is
Answer» 87. if an element X forms a covalent hydride in which hydrogen is two percent by weight then equivalent mass of element X in the hydride is

Discussion

18.	18. In a crystal of a AB , B form fcc packing and A occupy all the octahedral void if all the particle along the one body diagonal are removed then formula of crystal would be
Answer» 18. In a crystal of a AB , B form fcc packing and A occupy all the octahedral void if all the particle along the one body diagonal are removed then formula of crystal would be

Discussion

19.	List-I contains questions related to the reaction sequence given and List-II contains their answers.Which of the following options has the correct combination considering List-I and List-II?
Answer» List-I contains questions related to the reaction sequence given and List-II contains their answers. Which of the following options has the correct combination considering List-I and List-II?

Discussion

20.	Explain the difference between Buna-N and Buna-S.
Answer» Explain the difference between Buna-N and Buna-S.

Discussion

21.	Which of the following are used to convert RCHO into RCH2OH?
Answer» Which of the following are used to convert RCHO into $R C H_{2} O H$ ?

Discussion

22.	The number of octahedral sites per sphere in a fcc structure is [MP PMT 2000, 01]
Answer» The number of octahedral sites per sphere in a fcc structure is [MP PMT 2000, 01]

22.

The number of octahedral sites per sphere in a fcc structure is [MP PMT 2000, 01]

Answer»

The number of octahedral sites per sphere in a fcc structure is

[MP PMT 2000, 01]

Discussion

23.	The most reactive nucleophile among the following is
Answer» The most reactive nucleophile among the following is

Discussion

24.	Let 1.00 kg of liquid water at 100∘C be converted to steam at 100∘C by boiling at standard atmospheric pressure (which is 1.00 atm or 1.01 × 105 Pa) in the arrangement as shown. The volume of that water changes from an initial value of 1.00×10−3 m3 as a liquid to 1.671 m3 as steam. What is the change in the system's internal energy during the process?
Answer» Let 1.00 kg of liquid water at $100^{\circ} C$ be converted to steam at $100^{\circ} C$ by boiling at standard atmospheric pressure (which is 1.00 atm or 1.01 $\times$ 105 Pa) in the arrangement as shown. The volume of that water changes from an initial value of $1.00 \times 10^{- 3}$ $m^{3}$ as a liquid to 1.671 $m^{3}$ as steam. What is the change in the system's internal energy during the process?

24.

Let 1.00 kg of liquid water at 100∘C be converted to steam at 100∘C by boiling at standard atmospheric pressure (which is 1.00 atm or 1.01 × 105 Pa) in the arrangement as shown. The volume of that water changes from an initial value of 1.00×10−3 m3 as a liquid to 1.671 m3 as steam. What is the change in the system's internal energy during the process?

Answer»

Let 1.00 kg of liquid water at $100^{\circ} C$ be converted to steam at $100^{\circ} C$ by boiling at standard atmospheric pressure (which is 1.00 atm or 1.01 $\times$ 105 Pa) in the arrangement as shown. The volume of that water changes from an initial value of $1.00 \times 10^{- 3}$ $m^{3}$ as a liquid to 1.671 $m^{3}$ as steam.

What is the change in the system's internal energy during the process?

Discussion

25.	At 27∘ C, the ratio of rms velocities of ozone to oxygen is
Answer» At 27 $^{\circ}$ C, the ratio of rms velocities of ozone to oxygen is

25.

At 27∘ C, the ratio of rms velocities of ozone to oxygen is

Answer»

At 27 $^{\circ}$ C, the ratio of rms velocities of ozone to oxygen is

Discussion

26.	The structure of (S)-2-Fluorobutane is best represented by :
Answer» The structure of (S)-2-Fluorobutane is best represented by :

Discussion

27.	Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen? (IIT-JEE, 2012)
Answer» Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen? (IIT-JEE, 2012)

Discussion

28.	Which of the alkali metal is having least melting point? (a) Na (b) K (c) Rb (d) Cs
Answer» Which of the alkali metal is having least melting point? (a) Na (b) K (c) Rb (d) Cs

28.

Which of the alkali metal is having least melting point? (a) Na (b) K (c) Rb (d) Cs

Answer»

Which of the alkali metal is having least melting point?

(a) Na (b) K (c) Rb (d) Cs

Discussion

29.	Which of the following compounds containing carbonyl group will give coloured crystalline compound with
Answer» Which of the following compounds containing carbonyl group will give coloured crystalline compound with

Discussion

30.	At constant temperature on increasing the pressure of a gas by 5%, its volume is decreases by -x%. The value of x is (Answer upto two decimal places)
Answer» At constant temperature on increasing the pressure of a gas by 5%, its volume is decreases by -x%. The value of x is (Answer upto two decimal places)

Discussion

31.	39. The unpaired eletrons in Al and Si are present in 3p orbital. Which electrons will experience more effective nuclear charge from the nucleus?
Answer» 39. The unpaired eletrons in Al and Si are present in 3p orbital. Which electrons will experience more effective nuclear charge from the nucleus?

Discussion

32.	what is the pH of 0.0001 M HCl solution
Answer» what is the pH of 0.0001 M HCl solution

Discussion

33.	Alkaline hydrolysis of an ester is called
Answer» Alkaline hydrolysis of an ester is called

Discussion

34.	Calculate the maximum mass of ammonia which can be produced using 56 g of Dinitrogen and 10 g of Dihydrogen
Answer» Calculate the maximum mass of ammonia which can be produced using 56 g of Dinitrogen and 10 g of Dihydrogen

Discussion

35.	The pair of structure given below represent
Answer» The pair of structure given below represent

35.

The pair of structure given below represent

Answer»

The pair of structure given below represent

Discussion

36.	What is the distance between tetrahedral void and an octahedral void?
Answer» What is the distance between tetrahedral void and an octahedral void?

Discussion

37.	NH4Cl crystalizes in a body centered cubic lattice, with a unit cell distance of 400 pm. Calculate the distance (in pm) between the oppositely charged ions in the lattice (sum the answer upto two decimal places)(Given : √3=1.732)
Answer» $N H_{4} C l$ crystalizes in a body centered cubic lattice, with a unit cell distance of $400 pm$ . Calculate the distance $(in pm)$ between the oppositely charged ions in the lattice (sum the answer upto two decimal places) (Given : $\sqrt{3} = 1.732$ )

Discussion

38.	If the magnetic moment of a dioxygen species is 1.73 B.M, it may be:
Answer» If the magnetic moment of a dioxygen species is 1.73 B.M, it may be:

Discussion

39.	All of the following are chain isomers of each other, except one. Which is the exception?
Answer» All of the following are chain isomers of each other, except one. Which is the exception?

Discussion

40.	Explain: H3PO2 shows reducing properties but H3PO4 does not.
Answer» Explain: H3PO2 shows reducing properties but H3PO4 does not.

Discussion

41.	MAT : NUMBER ANALOGY63:31 :: ?:21
Answer» MAT : NUMBER ANALOGY 63:31 :: ?:21

Discussion

42.	The standard Gibbs energy change for the reaction H2OH+ + OH–at 25°C is :- Options1. –100 kJ2. +100 kJ3. –90 kJ4. +90 kJ
Answer» The standard Gibbs energy change for the reaction H2OH+ + OH–at 25°C is :- Options 1. –100 kJ 2. +100 kJ 3. –90 kJ 4. +90 kJ

Discussion

43.	explain sommerfeld extension on bohr theory
Answer» explain sommerfeld extension on bohr theory

Discussion

44.	What is angle of dip?
Answer» What is angle of dip?

Discussion

45.	In benzene solvent 50% of acetic acid dimerises while rest ionises the value of vant Hoff factor is
Answer» In benzene solvent 50% of acetic acid dimerises while rest ionises the value of vant Hoff factor is

Discussion

46.	Why does having 8 electrons in the outermost shell of an atom provide most stability OrIs there any scientific basis or reason behind the octet rule?
Answer» Why does having 8 electrons in the outermost shell of an atom provide most stability Or Is there any scientific basis or reason behind the octet rule?

Discussion

47.	In the reaction of primary alcohol and HCL we take anhydrous ZnCl2 what will happen if we take aqueous in place of anhydrous?
Answer» In the reaction of primary alcohol and HCL we take anhydrous ZnCl2 what will happen if we take aqueous in place of anhydrous?

Discussion

48.	7EH and 5FH are XORed. The output is multiplied by 10H. The result is
Answer» $7 E_{H}$ and $5 F_{H}$ are XORed. The output is multiplied by $10_{H}$ . The result is

Discussion

49.	The molal depression constant of a solvent having a freezing point of −23∘C and latent heat of fusion of 90 J g−1 is:
Answer» The molal depression constant of a solvent having a freezing point of $- 23^{\circ} C$ and latent heat of fusion of $90 J g^{- 1}$ is:

Discussion

50.	In which of the following are the bonds non-directional in nature?
Answer» In which of the following are the bonds non-directional in nature?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

For the gas-phase decomposition PCl5(g)△⇌PCl3(g)+Cl2(g):

An ideal gas is taken from point A to point C on P-V diagram through two process AOC and ABC as shown in the figure. Process AOC is isothermal

One mole of anhydrous MgCl2 dissolves in water and librates 25 cal.mol−1 of heat. ΔHhydration of MgCl2=−30 cal.mol−1 The lattice energy of MgCl2 is:

For a first order process A----->B, rate constant k1=0.693min-1&another first order process C---->D, k2=x min-1.If 99% of C--->D requires time same as 50% of reaction A---->B, value of x?

Determine change in enthalpy for the following process:- 0.2 equivalent of acid combines with 0.5 equivalent of base.

Why does 'backside attack' occur in SN² reactions?

The solubility of a gas in water which is exposed to the atmosphere, when the partial pressure is 700 mm is 1.4×10−4M. What is the solubility of the gas at 760 mm and at same temperature?

Find the major product 'S'.

Which of the following has a dipole moment of zero?

Two closed bulbs of equal volumes (V) containing an ideal gas initially at pressure pi and temperature T1 are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to T2. The final pressure pf is:

Consider the following cell reaction :2Fe(s)+O2(g)+4H+(aq)→2Fe2+(aq)+2H2O(I);E0=1.67 VAt [Fe2+=10−3M,P(O)2=0.1 atm and pH=3, the cell potential at 25∘ C is

What is the exact difference between heat, energy, temperature and work?

Give any three usage of sulphuric acid.

50.What wil be formed when 1-PHENYL PROPENE is reacted with HBr in the presence of organic peroxide? ( SHOW THE MECHANISM OF THE REACTION ) A) 1-CHLORO, 1-PHENYL PROPANE B) 2-CHLORO, 1-PHENYL PROPANE

89The strongest oxidizing agent among the folowingis(1) CIO4-(2) IO4-(4) Bro4-(3) HS

87. if an element X forms a covalent hydride in which hydrogen is two percent by weight then equivalent mass of element X in the hydride is

18. In a crystal of a AB , B form fcc packing and A occupy all the octahedral void if all the particle along the one body diagonal are removed then formula of crystal would be

List-I contains questions related to the reaction sequence given and List-II contains their answers.Which of the following options has the correct combination considering List-I and List-II?

Explain the difference between Buna-N and Buna-S.

Which of the following are used to convert RCHO into RCH2OH?

The number of octahedral sites per sphere in a fcc structure is [MP PMT 2000, 01]

The most reactive nucleophile among the following is

At 27∘ C, the ratio of rms velocities of ozone to oxygen is

The structure of (S)-2-Fluorobutane is best represented by :

Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen? (IIT-JEE, 2012)

Which of the alkali metal is having least melting point? (a) Na (b) K (c) Rb (d) Cs

Which of the following compounds containing carbonyl group will give coloured crystalline compound with

At constant temperature on increasing the pressure of a gas by 5%, its volume is decreases by -x%. The value of x is (Answer upto two decimal places)

39. The unpaired eletrons in Al and Si are present in 3p orbital. Which electrons will experience more effective nuclear charge from the nucleus?

what is the pH of 0.0001 M HCl solution

Alkaline hydrolysis of an ester is called

Calculate the maximum mass of ammonia which can be produced using 56 g of Dinitrogen and 10 g of Dihydrogen

The pair of structure given below represent

What is the distance between tetrahedral void and an octahedral void?

NH4Cl crystalizes in a body centered cubic lattice, with a unit cell distance of 400 pm. Calculate the distance (in pm) between the oppositely charged ions in the lattice (sum the answer upto two decimal places)(Given : √3=1.732)

If the magnetic moment of a dioxygen species is 1.73 B.M, it may be:

All of the following are chain isomers of each other, except one. Which is the exception?

Explain: H3PO2 shows reducing properties but H3PO4 does not.

MAT : NUMBER ANALOGY63:31 :: ?:21

The standard Gibbs energy change for the reaction H2OH+ + OH–at 25°C is :- Options1. –100 kJ2. +100 kJ3. –90 kJ4. +90 kJ

explain sommerfeld extension on bohr theory

What is angle of dip?

In benzene solvent 50% of acetic acid dimerises while rest ionises the value of vant Hoff factor is

Why does having 8 electrons in the outermost shell of an atom provide most stability OrIs there any scientific basis or reason behind the octet rule?

In the reaction of primary alcohol and HCL we take anhydrous ZnCl2 what will happen if we take aqueous in place of anhydrous?

7EH and 5FH are XORed. The output is multiplied by 10H. The result is

The molal depression constant of a solvent having a freezing point of −23∘C and latent heat of fusion of 90 J g−1 is:

In which of the following are the bonds non-directional in nature?