46295 + Interview Questions in Chemistry

1.	CoSO4Cl.5NH3 exists in two isomeric forms 'A and 'B'. Isomer 'A' reacts with AgNO3 to give white precipitate, but does not react with BaCl2. Isomer 'B' gives white precipitate with BaCl2 but does not react with AgNO3. Answer the following questions. (a) Identify \A' and 'B' and white their structural formulae (b) Name the type of isomerism involved. (c) Give the IUPAC name of 'A' and 'B'.
Answer» $C o S O_{4} C l .5 N H_{3}$ exists in two isomeric forms 'A and 'B'. Isomer 'A' reacts with $A g N O_{3}$ to give white precipitate, but does not react with $B a C l_{2} .$ Isomer 'B' gives white precipitate with $B a C l_{2}$ but does not react with $A g N O_{3} .$ Answer the following questions. (a) Identify \A' and 'B' and white their structural formulae (b) Name the type of isomerism involved. (c) Give the IUPAC name of 'A' and 'B'.

Discussion

2.	Explain the important aspects of resonance with reference to the CO2−3 ion.
Answer» Explain the important aspects of resonance with reference to the $C O_{3}^{2 -}$ ion.

Discussion

3.	Two identical containers each of volume V0 are joined by a small pipe. The containers contain identical gases at temperature T0 and pressure P0. One container is heated to temperature 2T0 while maintaining the other at the same temperature T0. The common pressure of the gas is P and n1 is the number of moles of gas in container at temperature 2T0. Then
Answer» Two identical containers each of volume $V_{0}$ are joined by a small pipe. The containers contain identical gases at temperature $T_{0}$ and pressure $P_{0}$ . One container is heated to temperature $2 T_{0}$ while maintaining the other at the same temperature $T_{0}$ . The common pressure of the gas is $P$ and $n_{1}$ is the number of moles of gas in container at temperature $2 T_{0} .$ Then

Discussion

4.	Review the equilibrium and choose the correct statement HClO4 + H2O ⇌ H3O+ + ClO−4
Answer» Review the equilibrium and choose the correct statement $H C l O_{4} + H_{2} O ⇌ H_{3} O^{+} + C l O_{4}^{-}$

4.

Review the equilibrium and choose the correct statement HClO4 + H2O ⇌ H3O+ + ClO−4

Answer»

Review the equilibrium and choose the correct statement

$H C l O_{4} + H_{2} O ⇌ H_{3} O^{+} + C l O_{4}^{-}$

Discussion

5.	Arrange the following compounds in the increasing order of polarity.
Answer» Arrange the following compounds in the increasing order of polarity.

Discussion

6.	In the given reaction, the total number of alkenes formed (including stereoisomers) is:
Answer» In the given reaction, the total number of alkenes formed (including stereoisomers) is:

Discussion

7.	Two coherent light sources each of wavelength λ are separated by a distance 3λ. Find the total number of minima formed on line AB (shown in the figure) which runs from -∞ to +∞ is (Answer upto two digits after the decimal point.)
Answer» Two coherent light sources each of wavelength $λ$ are separated by a distance 3 $λ$ . Find the total number of minima formed on line AB (shown in the figure) which runs from -∞ to +∞ is (Answer upto two digits after the decimal point.)

Discussion

8.	Fig. shows graphs between cut-off voltage V0 and 1λ for three metals 1, 2 and 3, where λ is the wavelength of the incident radiation in nm. If W1,W2 and W3 are the work functions of metals 1, 2 and 3 respectively, then
Answer» Fig. shows graphs between cut-off voltage $V_{0}$ and $\frac{1}{λ}$ for three metals 1, 2 and 3, where $λ$ is the wavelength of the incident radiation in nm. If $W_{1}, W_{2}$ and $W_{3}$ are the work functions of metals 1, 2 and 3 respectively, then

Discussion

9.	Consider the composite system, which is held at 300 K, shown in the following figure. Assuming ideal gas behavior, calculate the total pressure if the barriers separating the compartments are removed. Assume that the volume of the barriers is negligible. (Given: R = 0.082 atm L/mol. K)
Answer» Consider the composite system, which is held at 300 K, shown in the following figure. Assuming ideal gas behavior, calculate the total pressure if the barriers separating the compartments are removed. Assume that the volume of the barriers is negligible. (Given: R = 0.082 atm L/mol. K)

9.

Consider the composite system, which is held at 300 K, shown in the following figure. Assuming ideal gas behavior, calculate the total pressure if the barriers separating the compartments are removed. Assume that the volume of the barriers is negligible. (Given: R = 0.082 atm L/mol. K)

Answer»

Consider the composite system, which is held at 300 K, shown in the following figure. Assuming ideal gas behavior, calculate the total pressure if the barriers separating the compartments are removed. Assume that the volume of the barriers is negligible. (Given: R = 0.082 atm L/mol. K)

Discussion

10.	One of the following is a micronutrient in plants
Answer» One of the following is a micronutrient in plants

Discussion

11.	A is a alcohol.
Answer» A is a alcohol.

Discussion

12.	Which of the following has different bond angles?
Answer» Which of the following has different bond angles?

Discussion

13.	Product ‘A’ is:
Answer» Product ‘A’ is:

Discussion

14.	Which of the following compound is non aromatic:
Answer» Which of the following compound is non aromatic:

Discussion

15.	The standard reduction potential value of three metallic cations X, Y and Z are 0.52, - 3.303 and – 1.18 V respectively. The order of reducing power of the corresponding metals is
Answer» The standard reduction potential value of three metallic cations X, Y and Z are 0.52, - 3.303 and – 1.18 V respectively. The order of reducing power of the corresponding metals is

Discussion

16.	The decreasing order of pKa value of the following is: I. CH≡CH II. III.
Answer» The decreasing order of $p K_{a}$ value of the following is: I. $C H \equiv C H$ II. III.

Discussion

17.	What are the products expected in the disproportion reaction of HClO?
Answer» What are the products expected in the disproportion reaction of $H C l O$ ?

Discussion

18.	What's the molarity and molality of a 13% solution by weight of sulphuric acid with the density of 1.02g/ml?
Answer» What's the molarity and molality of a $13 %$ solution by weight of sulphuric acid with the density of 1.02g/ml?

Discussion

19.	The rate of a reaction is given by rate r=k[H+]n if the rate becomes 100 times when the pH changes from 2 to 1, the order of the reaction is
Answer» The rate of a reaction is given by rate $r = k [H^{+}]^{n}$ if the rate becomes 100 times when the pH changes from 2 to 1, the order of the reaction is

Discussion

20.	Caffeine has a molecular weight of 194.If it contains 28.9% by mass of Nitrogen, the number of atoms of Nitrogen in one molecule of caffeine is(pls give an explanation for necessary steps)
Answer» Caffeine has a molecular weight of 194.If it contains 28.9% by mass of Nitrogen, the number of atoms of Nitrogen in one molecule of caffeine is(pls give an explanation for necessary steps)

Discussion

21.	Stable oxidation state of Thallium III-A group element is
Answer» Stable oxidation state of Thallium III-A group element is

Discussion

22.	For a diagram The IUPAC name of the compund is given as 1,6-Dimethylcyclohex-1-ene. Why can't it be 2,3 Dimethylcyclohex-1-ene? Is it because the substitutuion should get the least number?
Answer» For a diagram The IUPAC name of the compund is given as 1,6-Dimethylcyclohex-1-ene. Why can't it be 2,3 Dimethylcyclohex-1-ene? Is it because the substitutuion should get the least number?

Discussion

23.	What is the difference between atoms and molecules ?
Answer» What is the difference between atoms and molecules ?

Discussion

24.	Market for a product is in equilibrium. Supply of the product decreases. Explain the chain of effects of this change until the market reaches equilibrium.
Answer» Market for a product is in equilibrium. Supply of the product decreases. Explain the chain of effects of this change until the market reaches equilibrium.

Discussion

25.	The total number of electrons that take part in forming the bonds in N2
Answer» The total number of electrons that take part in forming the bonds in $N_{2}$

Discussion

26.	The vapour pressure of a dilute solution of a solute is influenced by:
Answer» The vapour pressure of a dilute solution of a solute is influenced by:

Discussion

27.	Calculate the weight of CO having same no. of oxygen atoms present in 88gms of CO2.
Answer» Calculate the weight of CO having same no. of oxygen atoms present in 88gms of CO2.

Discussion

28.	An oxy acid of phosphorus is a white deliquescent crystalline solid. It can be prepared by the hydrolysis of P2O3 or PCl3. The formula of the compund is
Answer» An oxy acid of phosphorus is a white deliquescent crystalline solid. It can be prepared by the hydrolysis of $P_{2} O_{3}$ or $P C l_{3}$ . The formula of the compund is

Discussion

29.	Which of the following solutes will produce the largest total molality of solute particles upon addition of 1 kg of water?
Answer» Which of the following solutes will produce the largest total molality of solute particles upon addition of 1 kg of water?

Discussion

30.	The drawbacks of Mendeleev's Periodic Table are:
Answer» The drawbacks of Mendeleev's Periodic Table are:

Discussion

31.	Which combination results in formation of antibonding molecular orbital?
Answer» Which combination results in formation of antibonding molecular orbital?

Discussion

32.	Which of the following proves the dual nature of electrons?
Answer» Which of the following proves the dual nature of electrons?

Discussion

33.	Ferric hydroxide is a negative sol, which of the following electrolyte will coagulate it most:
Answer» Ferric hydroxide is a negative sol, which of the following electrolyte will coagulate it most:

Discussion

34.	Which of the following molecule having perfect tetrahedral shape, according to VSEPR theory?
Answer» Which of the following molecule having perfect tetrahedral shape, according to VSEPR theory?

Discussion

35.	Among the species given below which one is isoster of N2?
Answer» Among the species given below which one is isoster of $N_{2}$ ?

Discussion

36.	Ionisation enthalpies of elements of second period are given below Ioniisation enthalpy / k cal mol−1 : 520, 899, 801, 1086, 1402, 1314, 1681,2080. Match the correct enthalpy with the elements and complete the graph given in figure. Also write symols of elements with their atomic number.
Answer» Ionisation enthalpies of elements of second period are given below Ioniisation enthalpy / k cal $m o l^{- 1}$ : 520, 899, 801, 1086, 1402, 1314, 1681,2080. Match the correct enthalpy with the elements and complete the graph given in figure. Also write symols of elements with their atomic number.

36.

Ionisation enthalpies of elements of second period are given below Ioniisation enthalpy / k cal mol−1 : 520, 899, 801, 1086, 1402, 1314, 1681,2080. Match the correct enthalpy with the elements and complete the graph given in figure. Also write symols of elements with their atomic number.

Answer»

Ionisation enthalpies of elements of second period are given below Ioniisation enthalpy / k cal $m o l^{- 1}$ : 520, 899, 801, 1086, 1402, 1314, 1681,2080. Match the correct enthalpy with the elements and complete the graph given in figure. Also write symols of elements with their atomic number.

Discussion

37.	The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order.K2CO3(I), MgCO3(II), CaCO3 (III), BeCO3 (IV)
Answer» The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order.K₂CO₃(I), MgCO₃(II), CaCO₃ (III), BeCO₃ (IV)

Discussion

38.	What is the boiling point of a 3 molal aqueous solution if Kb is 0.512 oC/m?
Answer» What is the boiling point of a 3 molal aqueous solution if K_bis 0.512 ^oC/m?

Discussion

39.	A cubical block of ice floating in water has to support a metal piece weighing 0.5 kg. What can be the minimum edge of the block so that it does not sink in water? Specific gravity of ice = 0.9.
Answer» A cubical block of ice floating in water has to support a metal piece weighing 0.5 kg. What can be the minimum edge of the block so that it does not sink in water? Specific gravity of ice = 0.9.

Discussion

40.	Predict the order of electron density for the following compounds :
Answer» Predict the order of electron density for the following compounds :

Discussion

41.	What is the mode of action of antimicrobial drugs?
Answer» What is the mode of action of antimicrobial drugs?

Discussion

42.	In electrolytic refining of Cu, when 9.65 A of current is passed through an electrolytic cell for 30000 seconds to purify 100 g of an impure Cu metal at the cathode. What is % of impurity in the metal? (Atomic mass of Cu = 63.5 amu)
Answer» In electrolytic refining of Cu, when 9.65 A of current is passed through an electrolytic cell for 30000 seconds to purify 100 g of an impure Cu metal at the cathode. What is % of impurity in the metal? (Atomic mass of Cu = 63.5 amu)

Discussion

43.	Sir hybridisation or Molecular orbital theory in this which theory that doesn't have limitations and we are using now?
Answer» Sir hybridisation or Molecular orbital theory in this which theory that doesn't have limitations and we are using now?

Discussion

44.	On reacting ethene with HCl we get:
Answer» On reacting ethene with HCl we get:

Discussion

45.	Carbon-60 contains ______ pentagons and ______ hexagons.
Answer» Carbon-60 contains ______ pentagons and ______ hexagons.

Discussion

46.	Why Phosphorus has d orbital?
Answer» Why Phosphorus has d orbital?

Discussion

47.	In F-, H-, Cl-, Br- , which has smallest radius? And why...
Answer» In F-, H-, Cl-, Br- , which has smallest radius? And why...

Discussion

48.	Why atoms are electrically neutral?
Answer» Why atoms are electrically neutral?

Discussion

49.	Given NO−2+H2O⇋HNO2+OH−, Ka(HNO2)=7.2×10−4 Thus, the degree of hydrolysis of 0.05 M NaNO2 solution is:
Answer» Given $N O_{2}^{-} + H_{2} O ⇋ H N O_{2} + O H^{-}$ , $K_{a} (H N O_{2}) = 7.2 \times 10^{- 4}$ Thus, the degree of hydrolysis of 0.05 $M$ $N a N O_{2}$ solution is:

Discussion

50.	Out of H2+ and H2- which one is more stable and why though the B.O. is same
Answer» Out of H2+ and H2- which one is more stable and why though the B.O. is same

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Explain the important aspects of resonance with reference to the CO2−3 ion.

Review the equilibrium and choose the correct statement HClO4 + H2O ⇌ H3O+ + ClO−4

Arrange the following compounds in the increasing order of polarity.

In the given reaction, the total number of alkenes formed (including stereoisomers) is:

Two coherent light sources each of wavelength λ are separated by a distance 3λ. Find the total number of minima formed on line AB (shown in the figure) which runs from -∞ to +∞ is (Answer upto two digits after the decimal point.)

Fig. shows graphs between cut-off voltage V0 and 1λ for three metals 1, 2 and 3, where λ is the wavelength of the incident radiation in nm. If W1,W2 and W3 are the work functions of metals 1, 2 and 3 respectively, then

Consider the composite system, which is held at 300 K, shown in the following figure. Assuming ideal gas behavior, calculate the total pressure if the barriers separating the compartments are removed. Assume that the volume of the barriers is negligible. (Given: R = 0.082 atm L/mol. K)

One of the following is a micronutrient in plants

A is a alcohol.

Which of the following has different bond angles?

Product ‘A’ is:

Which of the following compound is non aromatic:

The standard reduction potential value of three metallic cations X, Y and Z are 0.52, - 3.303 and – 1.18 V respectively. The order of reducing power of the corresponding metals is

​​​​​​The decreasing order of pKa value of the following is: I. CH≡CH II. III.

What are the products expected in the disproportion reaction of HClO?

What's the molarity and molality of a 13% solution by weight of sulphuric acid with the density of 1.02g/ml?

The rate of a reaction is given by rate r=k[H+]n if the rate becomes 100 times when the pH changes from 2 to 1, the order of the reaction is

Caffeine has a molecular weight of 194.If it contains 28.9% by mass of Nitrogen, the number of atoms of Nitrogen in one molecule of caffeine is(pls give an explanation for necessary steps)

Stable oxidation state of Thallium III-A group element is

For a diagram The IUPAC name of the compund is given as 1,6-Dimethylcyclohex-1-ene. Why can't it be 2,3 Dimethylcyclohex-1-ene? Is it because the substitutuion should get the least number?

What is the difference between atoms and molecules ?

Market for a product is in equilibrium. Supply of the product decreases. Explain the chain of effects of this change until the market reaches equilibrium.

The total number of electrons that take part in forming the bonds in N2

The vapour pressure of a dilute solution of a solute is influenced by:

Calculate the weight of CO having same no. of oxygen atoms present in 88gms of CO2.

An oxy acid of phosphorus is a white deliquescent crystalline solid. It can be prepared by the hydrolysis of P2O3 or PCl3. The formula of the compund is

Which of the following solutes will produce the largest total molality of solute particles upon addition of 1 kg of water?

The drawbacks of Mendeleev's Periodic Table are:

Which combination results in formation of antibonding molecular orbital?

Which of the following proves the dual nature of electrons?

Ferric hydroxide is a negative sol, which of the following electrolyte will coagulate it most:

Which of the following molecule having perfect tetrahedral shape, according to VSEPR theory?

Among the species given below which one is isoster of N2?

Ionisation enthalpies of elements of second period are given below Ioniisation enthalpy / k cal mol−1 : 520, 899, 801, 1086, 1402, 1314, 1681,2080. Match the correct enthalpy with the elements and complete the graph given in figure. Also write symols of elements with their atomic number.

The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order.K2CO3(I), MgCO3(II), CaCO3 (III), BeCO3 (IV)

What is the boiling point of a 3 molal aqueous solution if Kb is 0.512 oC/m?

A cubical block of ice floating in water has to support a metal piece weighing 0.5 kg. What can be the minimum edge of the block so that it does not sink in water? Specific gravity of ice = 0.9.

Predict the order of electron density for the following compounds :

What is the mode of action of antimicrobial drugs?

In electrolytic refining of Cu, when 9.65 A of current is passed through an electrolytic cell for 30000 seconds to purify 100 g of an impure Cu metal at the cathode. What is % of impurity in the metal? (Atomic mass of Cu = 63.5 amu)

Sir hybridisation or Molecular orbital theory in this which theory that doesn't have limitations and we are using now?

On reacting ethene with HCl we get:

Carbon-60 contains ______ pentagons and ______ hexagons.

Why Phosphorus has d orbital?

In F-, H-, Cl-, Br- , which has smallest radius? And why...

Why atoms are electrically neutral?

Given NO−2+H2O⇋HNO2+OH−, Ka(HNO2)=7.2×10−4 Thus, the degree of hydrolysis of 0.05 M NaNO2 solution is:

Out of H2+ and H2- which one is more stable and why though the B.O. is same

The decreasing order of pKa value of the following is: I. CH≡CH II. III.

Carbon-60 contains pentagons and hexagons.