46295 + Interview Questions in Chemistry

1.	One mole of a non-ideal gas undergoes a change of state (2.0 atm, 3.0 litre, 95 k) → (4.0 atm, 5.0 litre, 245 k) with a change in internal energy, Δ U = 30.0 L atm. The change in enthalpy (Δ H) of the process in L-atm is
Answer» One mole of a non-ideal gas undergoes a change of state (2.0 atm, 3.0 litre, 95 k) $\to$ (4.0 atm, 5.0 litre, 245 k) with a change in internal energy, $Δ U$ = 30.0 L atm. The change in enthalpy ( $Δ H$ ) of the process in L-atm is

Discussion

2.	Calculate the entropy change accompanying the following change of state 5 mol of O2(27∘C,1atm) → 5mol of O2(117∘C,5atm) CP for O2 = 6.95 cal deg−1 mol−1
Answer» Calculate the entropy change accompanying the following change of state $5 m o l$ of $O_{2} (27^{\circ} C, 1 a t m) \to 5 m o l$ of $O_{2} (117^{\circ} C, 5 a t m)$ $C_{P}$ for $O_{2} = 6.95 c a l d e g^{- 1} m o l^{- 1}$

2.

Calculate the entropy change accompanying the following change of state 5 mol of O2(27∘C,1atm) → 5mol of O2(117∘C,5atm) CP for O2 = 6.95 cal deg−1 mol−1

Answer»

Calculate the entropy change accompanying the following change of state

$5 m o l$ of $O_{2} (27^{\circ} C, 1 a t m) \to 5 m o l$ of $O_{2} (117^{\circ} C, 5 a t m)$

$C_{P}$ for $O_{2} = 6.95 c a l d e g^{- 1} m o l^{- 1}$

Discussion

3.	The correct order of relative stability of half filled and completely filled orbitals is
Answer» The correct order of relative stability of half filled and completely filled orbitals is

Discussion

4.	An enzyme/protein is formed by chemically bonding together
Answer» An enzyme/protein is formed by chemically bonding together

Discussion

5.	For the process to occur under adiabatic conditions, the correct condition is:
Answer» For the process to occur under adiabatic conditions, the correct condition is:

Discussion

6.	SO2 when passed through water forms a solution of :
Answer» SO₂ when passed through water forms a solution of :

Discussion

7.	Which β- keto acid shown below will not undergo decarboxylation on heating with an acid?
Answer» Which $β$ - keto acid shown below will not undergo decarboxylation on heating with an acid?

Discussion

8.	Match the soaps given in Column I with items given in Column II. Column~IColumn~IIA. Soap chips1. dried miniature soap bubblesB. Soap granules2. Small broken pieces of soap formed from melted soapsC. Soap powder4. Soap powder + abrasives + builders (Na2CO3,Na3PO4)D. Scouring soap 4. Soap powder + bilders like Na2CO3 and Na3PO4
Answer» Match the soaps given in Column I with items given in Column II. $\begin{matrix} Column~I & Column~II A. Soap chips & 1. dried miniature soap bubbles B. Soap granules & 2. Small broken pieces of soap formed from melted soaps C. Soap powder & 4. Soap powder + abrasives + builders (N a_{2} C O_{3}, N a_{3} P O_{4}) D. Scouring soap & 4. Soap powder + bilders like N a_{2} C O_{3} and N a_{3} P O_{4} \end{matrix}$

Discussion

9.	Partial hydrolysis of XeF6 yields:
Answer» Partial hydrolysis of XeF₆ yields:

Discussion

10.	The reaction that takes place in the Clarke's process is
Answer» The reaction that takes place in the Clarke's process is

Discussion

11.	10 ml of gaseous hydrocarbon on combustion gives 40 ml of CO2(g) and 50 ml ofH2O (vap.). The hydrocarbon is
Answer» 10 ml of gaseous hydrocarbon on combustion gives 40 ml of $C O_{2}$ (g) and 50 ml of $H_{2} O$ (vap.). The hydrocarbon is

Discussion

12.	The incorrect reaction out of the following is:
Answer» The incorrect reaction out of the following is:

Discussion

13.	Helium gas at 1 atm and SO2 at 2 atm pressure, temperature being the same, are released seprately at the same moment into 1m long evacuated tubes of equal diameters. If helium reaches the other end of the tube in ts, what distance SO2 would traverse in the same time interval in the other tube ?
Answer» Helium gas at 1 atm and $S O_{2}$ at 2 atm pressure, temperature being the same, are released seprately at the same moment into 1m long evacuated tubes of equal diameters. If helium reaches the other end of the tube in ts, what distance $S O_{2}$ would traverse in the same time interval in the other tube ?

Discussion

14.	25.4 g of iodine and 7.1 g chlorine are made to react to give a mixture of ICl and ICl3. Number of moles of ICl and ICl3 formed are respectively ?
Answer» 25.4 g of iodine and 7.1 g chlorine are made to react to give a mixture of ICl and $I C l_{3}$ . Number of moles of ICl and $I C l_{3}$ formed are respectively ?

Discussion

15.	A subatomic particle has a -1 relative unit charge and the ratio of charge to mass is 1.758820×1011 C kg–1. Find the absolute mass of the sub-atomic particle in kg.
Answer» A subatomic particle has a -1 relative unit charge and the ratio of charge to mass is $1.758820 \times 10^{11} C k g^{- 1}$ . Find the absolute mass of the sub-atomic particle in kg.

Discussion

16.	Which of the following is true regarding Teflon?
Answer» Which of the following is true regarding Teflon?

Discussion

17.	Which of the following represents the staggered conformation with dihedral angle ϕ=60∘ ?
Answer» Which of the following represents the staggered conformation with dihedral angle $ϕ = 60^{\circ}$ ?

Discussion

18.	Why is AgNO3 not used in electroplating? Are there more such cases where a compound is a unit for use in electroplating?
Answer» Why is $A g N O_{3}$ not used in electroplating? Are there more such cases where a compound is a unit for use in electroplating?

Discussion

19.	The product in the following reaction is
Answer» The product in the following reaction is

Discussion

20.	100 ml of CH4 and C2H2 were exploded with excess of O2. After explosion and cooling, the mixture was treated with KOH, where a reduction of 165 ml was observed. Therefore the composition of the mixture is -
Answer» 100 ml of $C H_{4}$ and $C_{2} H_{2}$ were exploded with excess of $O_{2}$ . After explosion and cooling, the mixture was treated with KOH, where a reduction of 165 ml was observed. Therefore the composition of the mixture is -

Discussion

21.	When 0.0976 g of magnesium was heated in air, 0.1627 g of magnesium oxide (MgO) was produced. What is the mass of oxygen needed to produce 0.1627 g of MgO?
Answer» When 0.0976 g of magnesium was heated in air, 0.1627 g of magnesium oxide $(M g O)$ was produced. What is the mass of oxygen needed to produce 0.1627 g of $M g O$ ?

Discussion

22.	In which of the following reactions the final product will give a black precipitate of HgS when treated with CS2 followed by HgCl2?
Answer» In which of the following reactions the final product will give a black precipitate of HgS when treated with $C S_{2}$ followed by $H g C l_{2}$ ?

Discussion

23.	When petroleum is heated, the vapor contain mainly
Answer» When petroleum is heated, the vapor contain mainly

Discussion

24.	At 25∘C, the dissociation constant of a base BOH is 1.0 × 10−12. The concentration of Hydroxyl ions in 0.01 M aqueous solution of the base would be
Answer» At $25^{\circ} C$ , the dissociation constant of a base BOH is $1.0 \times 10^{- 12}$ . The concentration of Hydroxyl ions in 0.01 M aqueous solution of the base would be

24.

At 25∘C, the dissociation constant of a base BOH is 1.0 × 10−12. The concentration of Hydroxyl ions in 0.01 M aqueous solution of the base would be

Answer»

At $25^{\circ} C$ , the dissociation constant of a base BOH is $1.0 \times 10^{- 12}$ . The

concentration of Hydroxyl ions in 0.01 M aqueous solution of the base

would be

Discussion

25.	For the gaseous elementary reaction: 2A(g)+B(g)⟶product , if the pressure is increased three times keeping temperature and volume constant then the rate of reaction will be increased by how many times?
Answer» For the gaseous elementary reaction: $2 A (g) + B (g) ⟶ product$ , if the pressure is increased three times keeping temperature and volume constant then the rate of reaction will be increased by how many times?

Discussion

26.	Which of the following is a redox reaction?
Answer» Which of the following is a redox reaction?

Discussion

27.	A nucleus with Z=92 emits the following in a sequence : α,β−,β−,α,α,α,α,α,β−,β−,β+,α,β+,α The Z of the resulting nucleus is
Answer» A nucleus with $Z = 92$ emits the following in a sequence : $α, β -, β -, α, α, α, α, α, β -, β -, β +, α, β +, α$ The $Z$ of the resulting nucleus is

Discussion

28.	Out of the following which has smallest bond length [RPMT 1997]
Answer» Out of the following which has smallest bond length [RPMT 1997]

28.

Out of the following which has smallest bond length [RPMT 1997]

Answer»

Out of the following which has smallest bond length

[RPMT 1997]

Discussion

29.	Which of the following has highest coagulating power for As2S3 sol?
Answer» Which of the following has highest coagulating power for $A s_{2} S_{3} s o l$ ?

Discussion

30.	Potassium permanganate on heating gives
Answer» Potassium permanganate on heating gives

Discussion

31.	The shape of XeO3 molecule is __
Answer» The shape of $X e O_{3}$ molecule is __

Discussion

32.	BaSO4 and carbon on heating reacts to produces:
Answer» $B a S O_{4}$ and carbon on heating reacts to produces:

Discussion

33.	In a 0.2 molal aqueous solution of a weak acid HX the degree of ionization is 0.3 . Taking kƒ for water as 1.85, the freezing point of the solution will be nearly:
Answer» In a 0.2 molal aqueous solution of a weak acid HX the degree of ionization is 0.3 . Taking kƒ for water as 1.85, the freezing point of the solution will be nearly:

Discussion

34.	What is isoelectronic species?
Answer» What is isoelectronic species?

Discussion

35.	Boron halides are monomeric while AlCl3 forms dimer. Why?
Answer» Boron halides are monomeric while AlCl₃ forms dimer. Why?

Discussion

36.	The volume of oxygen liberated from 15 ml of 20 volume H2O2 is
Answer» The volume of oxygen liberated from 15 ml of 20 volume $H_{2} O_{2}$ is

Discussion

37.	In which of the following compounds, the Fluorine atoms are placed axially in a trigonal bipyramidal geometry?
Answer» In which of the following compounds, the Fluorine atoms are placed axially in a trigonal bipyramidal geometry?

Discussion

38.	The Henry's law constant for the solubility of N2 gas in water at 298K is 1.0 x 105 atm. The mole fraction of N2 is 0.8. The number of moles of N2 from air dissolved in 10 moles of water at 298K and 5 atm pressure is
Answer» The Henry's law constant for the solubility of N₂ gas in water at 298K is 1.0 x 10⁵ atm. The mole fraction of N₂ is 0.8. The number of moles of N₂ from air dissolved in 10 moles of water at 298K and 5 atm pressure is

Discussion

39.	Why the cu size is lesser than Na...? Thn how the cu shielding... Effect is less compared to Na?
Answer» Why the cu size is lesser than Na...? Thn how the cu shielding... Effect is less compared to Na?

Discussion

40.	Four faradays of electricity were passed through AgNO3 (l), CdSO4(l), AlCl3(l), & PbCl4(l) kept in four vessels using inert electrodes. The ratio of moles of Ag, Cd, Al,& Pb deposited will be A. 12 : 4 : 6 : 3 B.12 : 6 : 4 : 3
Answer» Four faradays of electricity were passed through AgNO₃ (l), CdSO₄(l), AlCl₃(l), & PbCl₄(l) kept in four vessels using inert electrodes. The ratio of moles of Ag, Cd, Al,& Pb deposited will be A. 12 : 4 : 6 : 3 B.12 : 6 : 4 : 3

40.

Four faradays of electricity were passed through AgNO3 (l), CdSO4(l), AlCl3(l), & PbCl4(l) kept in four vessels using inert electrodes. The ratio of moles of Ag, Cd, Al,& Pb deposited will be A. 12 : 4 : 6 : 3 B.12 : 6 : 4 : 3

Answer»

Four faradays of electricity were passed through AgNO₃ (l), CdSO₄(l), AlCl₃(l), & PbCl₄(l) kept in four vessels using inert electrodes. The ratio of moles of Ag, Cd, Al,& Pb deposited will be

A. 12 : 4 : 6 : 3

B.12 : 6 : 4 : 3

Discussion

41.	how did we found out the mass of positive particles in canal rays experiment with discharge tube
Answer» how did we found out the mass of positive particles in canal rays experiment with discharge tube

Discussion

42.	d-block elements are also called as:
Answer» d-block elements are also called as:

Discussion

43.	Which of the following is intermediate in Sandmeyer's reaction?
Answer» Which of the following is intermediate in Sandmeyer's reaction?

Discussion

44.	What happens if the factors in column A are increased? ABA) Cation sizeI)Polarizability increasesB) Cation chargeII) Polarizing power decreaseC) Anion ChargeIII) Polarizability increasesD) Anion SizeIV) Polarizing power increases
Answer» What happens if the factors in column A are increased? $\begin{matrix} A & B A) Cation size & I) Polarizability increases B) Cation charge & II) Polarizing power decrease C) Anion Charge & III) Polarizability increases D) Anion Size & IV) Polarizing power increases \end{matrix}$

44.

What happens if the factors in column A are increased? ABA) Cation sizeI)Polarizability increasesB) Cation chargeII) Polarizing power decreaseC) Anion ChargeIII) Polarizability increasesD) Anion SizeIV) Polarizing power increases

Answer»

What happens if the factors in column A are increased?

$\begin{matrix} A & B A) Cation size & I) Polarizability increases B) Cation charge & II) Polarizing power decrease C) Anion Charge & III) Polarizability increases D) Anion Size & IV) Polarizing power increases \end{matrix}$

Discussion

45.	The average annual rate at which the initial salary offered in Software, increases
Answer» The average annual rate at which the initial salary offered in Software, increases

Discussion

46.	Among the following which one has the highest paramagnetism?
Answer» Among the following which one has the highest paramagnetism?

Discussion

47.	The ratio of number of σ - bonds to π - bonds in C2(CN)4 molecule
Answer» The ratio of number of $σ$ - bonds to $π$ - bonds in $C_{2} (C N)_{4}$ molecule

Discussion

48.	What is steric hindrance & steric effects?
Answer» What is steric hindrance & steric effects?

Discussion

49.	What is the charge of 96 amu of S2-
Answer» What is the charge of 96 amu of S2-

Discussion

50.	In a certain code LATE is written as PEXI then code for TRACE is:
Answer» In a certain code LATE is written as PEXI then code for TRACE is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

One mole of a non-ideal gas undergoes a change of state (2.0 atm, 3.0 litre, 95 k) → (4.0 atm, 5.0 litre, 245 k) with a change in internal energy, Δ U = 30.0 L atm. The change in enthalpy (Δ H) of the process in L-atm is

Calculate the entropy change accompanying the following change of state 5 mol of O2(27∘C,1atm) → 5mol of O2(117∘C,5atm) CP for O2 = 6.95 cal deg−1 mol−1

The correct order of relative stability of half filled and completely filled orbitals is

An enzyme/protein is formed by chemically bonding together

For the process to occur under adiabatic conditions, the correct condition is:

SO2 when passed through water forms a solution of :

Which β- keto acid shown below will not undergo decarboxylation on heating with an acid?

Partial hydrolysis of XeF6 yields:

The reaction that takes place in the Clarke's process is

10 ml of gaseous hydrocarbon on combustion gives 40 ml of CO2(g) and 50 ml ofH2O (vap.). The hydrocarbon is

The incorrect reaction out of the following is:

Helium gas at 1 atm and SO2 at 2 atm pressure, temperature being the same, are released seprately at the same moment into 1m long evacuated tubes of equal diameters. If helium reaches the other end of the tube in ts, what distance SO2 would traverse in the same time interval in the other tube ?

25.4 g of iodine and 7.1 g chlorine are made to react to give a mixture of ICl and ICl3. Number of moles of ICl and ICl3 formed are respectively ?

A subatomic particle has a -1 relative unit charge and the ratio of charge to mass is 1.758820×1011 C kg–1. Find the absolute mass of the sub-atomic particle in kg.

Which of the following is true regarding Teflon?

Which of the following represents the staggered conformation with dihedral angle ϕ=60∘ ?

Why is AgNO3 not used in electroplating? Are there more such cases where a compound is a unit for use in electroplating?

The product in the following reaction is

100 ml of CH4 and C2H2 were exploded with excess of O2. After explosion and cooling, the mixture was treated with KOH, where a reduction of 165 ml was observed. Therefore the composition of the mixture is -

When 0.0976 g of magnesium was heated in air, 0.1627 g of magnesium oxide (MgO) was produced. What is the mass of oxygen needed to produce 0.1627 g of MgO?

In which of the following reactions the final product will give a black precipitate of HgS when treated with CS2 followed by HgCl2?

When petroleum is heated, the vapor contain mainly

At 25∘C, the dissociation constant of a base BOH is 1.0 × 10−12. The concentration of Hydroxyl ions in 0.01 M aqueous solution of the base would be

For the gaseous elementary reaction: 2A(g)+B(g)⟶product , if the pressure is increased three times keeping temperature and volume constant then the rate of reaction will be increased by how many times?

Which of the following is a redox reaction?

A nucleus with Z=92 emits the following in a sequence : α,β−,β−,α,α,α,α,α,β−,β−,β+,α,β+,α The Z of the resulting nucleus is

Out of the following which has smallest bond length [RPMT 1997]

Which of the following has highest coagulating power for As2S3 sol?

Potassium permanganate on heating gives

The shape of XeO3 molecule is __

BaSO4 and carbon on heating reacts to produces:

In a 0.2 molal aqueous solution of a weak acid HX the degree of ionization is 0.3 . Taking kƒ for water as 1.85, the freezing point of the solution will be nearly:

What is isoelectronic species?

Boron halides are monomeric while AlCl3 forms dimer. Why?

The volume of oxygen liberated from 15 ml of 20 volume H2O2 is

In which of the following compounds, the Fluorine atoms are placed axially in a trigonal bipyramidal geometry?

The Henry's law constant for the solubility of N2 gas in water at 298K is 1.0 x 105 atm. The mole fraction of N2 is 0.8. The number of moles of N2 from air dissolved in 10 moles of water at 298K and 5 atm pressure is

Why the cu size is lesser than Na...? Thn how the cu shielding... Effect is less compared to Na?

Four faradays of electricity were passed through AgNO3 (l), CdSO4(l), AlCl3(l), &amp; PbCl4(l) kept in four vessels using inert electrodes. The ratio of moles of Ag, Cd, Al,&amp; Pb deposited will be A. 12 : 4 : 6 : 3 B.12 : 6 : 4 : 3

how did we found out the mass of positive particles in canal rays experiment with discharge tube

d-block elements are also called as:

Which of the following is intermediate in Sandmeyer's reaction?

What happens if the factors in column A are increased? ABA) Cation sizeI)Polarizability increasesB) Cation chargeII) Polarizing power decreaseC) Anion ChargeIII) Polarizability increasesD) Anion SizeIV) Polarizing power increases

The average annual rate at which the initial salary offered in Software, increases

Among the following which one has the highest paramagnetism?

The ratio of number of σ - bonds to π - bonds in C2(CN)4 molecule

What is steric hindrance &amp; steric effects?

What is the charge of 96 amu of S2-

In a certain code LATE is written as PEXI then code for TRACE is:

Four faradays of electricity were passed through AgNO3 (l), CdSO4(l), AlCl3(l), & PbCl4(l) kept in four vessels using inert electrodes. The ratio of moles of Ag, Cd, Al,& Pb deposited will be A. 12 : 4 : 6 : 3 B.12 : 6 : 4 : 3

What is steric hindrance & steric effects?