46295 + Interview Questions in Chemistry

1.	What is the quotient(q) and the remainder(r) when 15 is divided by 5?
Answer» What is the quotient( $q$ ) and the remainder( $r$ ) when 15 is divided by 5?

Discussion

2.	What is the accurate representation of a Hydrated Proton in aqueous solution?
Answer» What is the accurate representation of a Hydrated Proton in aqueous solution?

Discussion

3.	Of the given forms of Hydrogen, which is the most stable:
Answer» Of the given forms of Hydrogen, which is the most stable:

Discussion

4.	A 1.50g of an ore containing silver was dissolved and all of the Ag+was converted into 0.24 g of Ag2S .what was the percentage of silver in the ore
Answer» A 1.50g of an ore containing silver was dissolved and all of the Ag⁺was converted into 0.24 g of Ag2S .what was the percentage of silver in the ore

Discussion

5.	Butanal and 2-methyl propanal are examples of which type of isomerism?
Answer» Butanal and 2-methyl propanal are examples of which type of isomerism?

Discussion

6.	According to Einstein photoelectric effect equation, the graph between the kinetic energy of photoelectron ejected and the frequency (ν) of incidented radiations is:
Answer» According to Einstein photoelectric effect equation, the graph between the kinetic energy of photoelectron ejected and the frequency ( $ν$ ) of incidented radiations is:

Discussion

7.	What are polar and non-polar solvents?
Answer» What are polar and non-polar solvents?

Discussion

8.	Law of evaporation
Answer» Law of evaporation

Discussion

9.	The standard heat of formation of CH4(g), CO2(g) and H2O(g) are -76.2, -398.8 and -241.6 kJ mol−1 respectively. Calculate the amount of heat evolved by burning 1m3 of methane measured under normal conditions.
Answer» The standard heat of formation of $C H_{4} (g), C O_{2} (g) a n d H_{2} O (g)$ are -76.2, -398.8 and -241.6 $k J m o l^{- 1}$ respectively. Calculate the amount of heat evolved by burning $1 m^{3}$ of methane measured under normal conditions.

Discussion

10.	According to Avogadro's Law, "Equal volumes of gases at the same temperature and pressure contain equal numbers of molecules". But how is this statement correct? How do we know that equal number of molecules are present in two gases taken in equal volumes? Even if we consider equal volumes of any two gases(let's consider two gases for example) contain equal number of molecules, if we have the two gases in two containers of same volumes, we can add more gas to any one container and increase the density of the gas inside the container. In that case, the volume of the gas remains equal to the volume of the container but the number of gas molecules inside the container has increased and there is no chage to the number of molecules of the other gas we took inside a similar container. So now we have equal volumes of two gases but we have increased the number of molecules of one gas so now how can we say that the equal volumes of these two gases contain equal number of molecules? If we take equal number of molecules of two gases and contain one of the gas in a container of some volume and the other gas in a container of a different volume, we will have unequal volumes of two gases having equal number of particles. So how is Avogadro's Law explained?
Answer» According to Avogadro's Law, "Equal volumes of gases at the same temperature and pressure contain equal numbers of molecules". But how is this statement correct? How do we know that equal number of molecules are present in two gases taken in equal volumes? Even if we consider equal volumes of any two gases(let's consider two gases for example) contain equal number of molecules, if we have the two gases in two containers of same volumes, we can add more gas to any one container and increase the density of the gas inside the container. In that case, the volume of the gas remains equal to the volume of the container but the number of gas molecules inside the container has increased and there is no chage to the number of molecules of the other gas we took inside a similar container. So now we have equal volumes of two gases but we have increased the number of molecules of one gas so now how can we say that the equal volumes of these two gases contain equal number of molecules? If we take equal number of molecules of two gases and contain one of the gas in a container of some volume and the other gas in a container of a different volume, we will have unequal volumes of two gases having equal number of particles. So how is Avogadro's Law explained?

10.

According to Avogadro's Law, "Equal volumes of gases at the same temperature and pressure contain equal numbers of molecules". But how is this statement correct? How do we know that equal number of molecules are present in two gases taken in equal volumes? Even if we consider equal volumes of any two gases(let's consider two gases for example) contain equal number of molecules, if we have the two gases in two containers of same volumes, we can add more gas to any one container and increase the density of the gas inside the container. In that case, the volume of the gas remains equal to the volume of the container but the number of gas molecules inside the container has increased and there is no chage to the number of molecules of the other gas we took inside a similar container. So now we have equal volumes of two gases but we have increased the number of molecules of one gas so now how can we say that the equal volumes of these two gases contain equal number of molecules? If we take equal number of molecules of two gases and contain one of the gas in a container of some volume and the other gas in a container of a different volume, we will have unequal volumes of two gases having equal number of particles. So how is Avogadro's Law explained?

Answer»

According to Avogadro's Law, "Equal volumes of gases at the same temperature and pressure contain equal numbers of molecules". But how is this statement correct? How do we know that equal number of molecules are present in two gases taken in equal volumes?

Even if we consider equal volumes of any two gases(let's consider two gases for example) contain equal number of molecules, if we have the two gases in two containers of same volumes, we can add more gas to any one container and increase the density of the gas inside the container. In that case, the volume of the gas remains equal to the volume of the container but the number of gas molecules inside the container has increased and there is no chage to the number of molecules of the other gas we took inside a similar container. So now we have equal volumes of two gases but we have increased the number of molecules of one gas so now how can we say that the equal volumes of these two gases contain equal number of molecules?

If we take equal number of molecules of two gases and contain one of the gas in a container of some volume and the other gas in a container of a different volume, we will have unequal volumes of two gases having equal number of particles.

So how is Avogadro's Law explained?

Discussion

11.	Define red shift and blue shift in light?
Answer» Define red shift and blue shift in light?

Discussion

12.	a weak acid HX has a dissociation constant 10^-5. the ph of 0.1M solution of this acid will be
Answer» a weak acid HX has a dissociation constant 10^-5. the ph of 0.1M solution of this acid will be

Discussion

13.	A solution of glucose (molar mass = 180 g/mol) in water is labelled as 10% (by mass). what would be the molality and molarity of the solution?(density of solution = 1.2 g/mL)
Answer» A solution of glucose (molar mass = 180 g/mol) in water is labelled as 10% (by mass). what would be the molality and molarity of the solution? (density of solution = 1.2 g/mL)

Discussion

14.	Step 3 of an input is:94 brotula 77 suffix hallmark maintain 37 40 Which of the following will step 6?
Answer» Step 3 of an input is:94 brotula 77 suffix hallmark maintain 37 40 Which of the following will step 6?

14.

Step 3 of an input is:94 brotula 77 suffix hallmark maintain 37 40 Which of the following will step 6?

Answer»

Step 3 of an input is:94 brotula 77 suffix hallmark maintain 37 40

Which of the following will step 6?

Discussion

15.	In nucleophilic addition reactions, the reactivity of carbonyl compounds follows order -
Answer» In nucleophilic addition reactions, the reactivity of carbonyl compounds follows order -

Discussion

16.	Assuming complete precipitation of AgCl, calculate the sum of the molar concentration of all the ions if 2l of 2M Ag2SO4 is mixed with 4l of 1M NaCl solution is
Answer» Assuming complete precipitation of AgCl, calculate the sum of the molar concentration of all the ions if 2l of 2M $A g_{2} S O_{4}$ is mixed with 4l of 1M NaCl solution is

16.

Assuming complete precipitation of AgCl, calculate the sum of the molar concentration of all the ions if 2l of 2M Ag2SO4 is mixed with 4l of 1M NaCl solution is

Answer»

Assuming complete precipitation of AgCl, calculate the sum of the molar concentration of all the ions if 2l of 2M $A g_{2} S O_{4}$ is mixed with 4l of 1M NaCl solution is

Discussion

17.	Which is not true for physical adsorption?
Answer» Which is not true for physical adsorption?

Discussion

18.	One mole of PbS is oxidised to PbSO4 by H2O2. In this process, the number of electrons involved are [N0 = Avagadro number]
Answer» One mole of PbS is oxidised to $P b S O_{4}$ by $H_{2}$ $O_{2}$ . In this process, the number of electrons involved are [ $N_{0}$ = Avagadro number]

Discussion

19.	Why particles are not seen in colloids?
Answer» Why particles are not seen in colloids?

Discussion

20.	Which one of the following electyrolytes has the same value of van’t Hoff factor (i) as that of Al2(SO4)3 (if all are 100% ionized)?
Answer» Which one of the following electyrolytes has the same value of van’t Hoff factor (i) as that of $A l_{2} (S O_{4})_{3}$ (if all are 100% ionized)?

Discussion

21.	Which type of defect is represented by the following figure?
Answer» Which type of defect is represented by the following figure?

Discussion

22.	The IUPAC name of
Answer» The IUPAC name of

Discussion

23.	Which of the following is an oxidizing agent ?
Answer» Which of the following is an oxidizing agent ?

Discussion

24.	Ksp of BaCrO4 is 2 × 10−10 at room temperature. Calculate the mass of Barium chromate lost by washing with three litres of water. Will the loss in mass depend on the quantity of precipitate?
Answer» $K_{s p}$ of $B a C r O_{4}$ is $2 \times 10^{- 10}$ at room temperature. Calculate the mass of Barium chromate lost by washing with three litres of water. Will the loss in mass depend on the quantity of precipitate?

Discussion

25.	An atom of an element contains 29 electrons and 35 neutrons. Deduce (i) the number of protons (ii) the electronic configuration of the element.
Answer» An atom of an element contains 29 electrons and 35 neutrons. Deduce (i) the number of protons (ii) the electronic configuration of the element.

25.

An atom of an element contains 29 electrons and 35 neutrons. Deduce (i) the number of protons (ii) the electronic configuration of the element.

Answer»

An atom of an element contains 29 electrons and 35 neutrons. Deduce
(i) the number of protons

(ii) the electronic configuration of the element.

Discussion

26.	What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 4 to an energy level with n = 2?
Answer» What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 4 to an energy level with n = 2?

Discussion

27.	Number of structural isomers possible for C6H14 and C7H16 are respectively?
Answer» Number of structural isomers possible for $C_{6} H_{14}$ and $C_{7} H_{16}$ are respectively?

Discussion

28.	If a > b and b > c, then,
Answer» If a > b and b > c, then,

Discussion

29.	Calculate the molality of 1 litre solution of 98% H2SO4 (weight/volume). The density of the solution is 1.88 g/mL.
Answer» Calculate the molality of $1$ litre solution of $98 %$ $H_{2} S O_{4}$ (weight/volume). The density of the solution is $1.88 g / m L$ .

Discussion

30.	An ester (A) with mol. formula C9H10O2 was treated with excess of CH3−Mg Br and the complex. So formed was treated with H2SO4 to give on olefin (B). Ozonolysis of (B) gave a ketone with molecular formula C8H8O which shows the iodoform test the structure of (a) is -
Answer» An ester (A) with mol. formula $C_{9} H_{10} O_{2}$ was treated with excess of $C H_{3} - M g B r$ and the complex. So formed was treated with $H_{2} S O_{4}$ to give on olefin (B). Ozonolysis of (B) gave a ketone with molecular formula $C_{8} H_{8} O$ which shows the iodoform test the structure of (a) is -

Discussion

31.	The boiling point of a solution made by dissolving 12.0 g of glucose in 100 g of water is 100.34∘C. Calculate the molecular weight of glucose; Kb for water =0.52∘C/m.
Answer» The boiling point of a solution made by dissolving 12.0 g of glucose in 100 g of water is ${100.34}^{\circ} C$ . Calculate the molecular weight of glucose; $K_{b}$ for water $= {0.52}^{\circ} C / m$ .

Discussion

32.	What are steroids and how do they differ from other derived lipids?
Answer» What are steroids and how do they differ from other derived lipids?

Discussion

33.	Specify the hybridization of the central atom in the following species respectively (N−3,NOCl,N2O):
Answer» Specify the hybridization of the central atom in the following species respectively $(N_{3}^{-}, N O C l, N_{2} O)$ :

Discussion

34.	Compound (C) was prepared in a three step sequence from ethyl trifluoroacetate. The first step in a sequence involved treating ethyl trifluoroacetate with NH3 to give a compound (A), which on heating with (X) gives (B). (B) on treatment with an orangometallic (Y), followed by hydrolysis produces (C) . Based on above passage attempt the following questions: Structure of (B) , would be
Answer» Compound (C) was prepared in a three step sequence from ethyl trifluoroacetate. The first step in a sequence involved treating ethyl trifluoroacetate with NH₃ to give a compound (A), which on heating with (X) gives (B). (B) on treatment with an orangometallic (Y), followed by hydrolysis produces (C) . Based on above passage attempt the following questions: Structure of (B) , would be

Discussion

35.	P4O6 is hydrolysed to
Answer» $P_{4} O_{6}$ is hydrolysed to

Discussion

36.	Major product is :
Answer» Major product is :

Discussion

37.	For the system 3A + 2B ⇌ C, the expression for equilibrium constant is
Answer» For the system 3A + 2B $⇌$ C, the expression for equilibrium constant is

37.

For the system 3A + 2B ⇌ C, the expression for equilibrium constant is

Answer»

For the system 3A + 2B $⇌$ C, the expression for equilibrium constant is

Discussion

38.	Standard molar enthalpy of formation of CO2 is equal to
Answer» Standard molar enthalpy of formation of $C O_{2}$ is equal to

Discussion

39.	On going from right to left in a period in the periodic table the electronegativity of the elements
Answer» On going from right to left in a period in the periodic table the electronegativity of the elements

Discussion

40.	The total sum of number of pπ−dπ bonds in the following molecules. SO3,SO2,XeO4,IO−3
Answer» The total sum of number of $p π - d π$ bonds in the following molecules. $S O_{3}, S O_{2}, X e O_{4}, I O_{3}^{-}$

Discussion

41.	van der Waals' constant 'b' of Ar is 3.22×10−5m3mol−1.Calculate the molecular diameter(in nm) of Ar.
Answer» van der Waals' constant ' $b$ ' of $A r$ is $3.22 \times 10^{- 5} m^{3} {mol}^{- 1}$ .Calculate the molecular diameter(in $n m$ ) of $A r$ .

Discussion

42.	Which of the following options cannot be represented by the plot given below?
Answer» Which of the following options cannot be represented by the plot given below?

Discussion

43.	The structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is?
Answer» The structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is?

Discussion

44.	In a compound C,H & N are present in the ratio of 18:2:7 by weight. The empirical formula of the compound is:
Answer» In a compound $C, H$ & $N$ are present in the ratio of $18 : 2 : 7$ by weight. The empirical formula of the compound is:

Discussion

45.	Consider following equilibrium at 400 K and 24 atm. 3A⇌2B+2C+D If the equilibrium pressure of A is 4 atm then Kc (in mol2 L−2) will be: (Take R=0.08 L atm K−1 mol−1)
Answer» Consider following equilibrium at $400 K$ and $24 atm$ . $3 A ⇌ 2 B + 2 C + D$ If the equilibrium pressure of $A$ is $4 atm$ then $K_{c} ({in mol}^{2} L^{- 2})$ will be: (Take $R = 0.08 {L atm K}^{- 1} {mol}^{- 1}$ )

Discussion

46.	One 11H atom weighs 1.6736 × 10−24 g. Express 11H atom's weight in amu.
Answer» One $_{1}^{1} H$ atom weighs 1.6736 $\times$ $10^{- 24}$ g. Express $_{1}^{1} H$ atom's weight in amu.

Discussion

47.	I. CO II. PCl5 III. BF3 IV. BCl3 V. SiH4 VI. SiF4 VII. CCl4 VIII. BeCl2 IX. N(SiH3)3 X. H2O The number of molecules showing back bonding among the given molecules
Answer» $I . C O$ $I I . P C l_{5}$ $I I I . B F_{3}$ $I V . B C l_{3}$ $V . S i H_{4}$ $V I . S i F_{4}$ $V I I . C C l_{4}$ $V I I I . B e C l_{2}$ $I X . N (S i H_{3})_{3}$ $X . H_{2} O$ The number of molecules showing back bonding among the given molecules

Discussion

48.	One mole of O2 gas having a volume equal to 22.4 litres at 0∘C and 1 atmospheric pressure in compressed isothermally so that its volume reduces to 11.2 litres. The work done in this process is
Answer» One mole of $O_{2}$ gas having a volume equal to 22.4 litres at $0^{\circ} C$ and 1 atmospheric pressure in compressed isothermally so that its volume reduces to 11.2 litres. The work done in this process is

Discussion

49.	A uniform metallic spherical shell is suspended from ceiling. It has two holes A and B at top and bottom respectively.
Answer» A uniform metallic spherical shell is suspended from ceiling. It has two holes A and B at top and bottom respectively.

49.

A uniform metallic spherical shell is suspended from ceiling. It has two holes A and B at top and bottom respectively.

Answer»

A uniform metallic spherical shell is suspended from ceiling. It has two holes A and B at top and bottom respectively.

Discussion

50.	The vapour pressure of water at 80∘C is 355 mm of Hg. The total pressure of a 1 L vessel containing O2 saturated with water at 80∘C is 760 mm of Hg. The contents of the vessel are pumped into a 0.3 L vessel at the same temperature. What is the partial pressure of O2?
Answer» The vapour pressure of water at $80^{\circ} C$ is $355 mm$ of $H g$ . The total pressure of a $1 L$ vessel containing $O_{2}$ saturated with water at $80^{\circ} C$ is $760 mm$ of $H g$ . The contents of the vessel are pumped into a $0.3 L$ vessel at the same temperature. What is the partial pressure of $O_{2}$ ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the quotient(q) and the remainder(r) when 15 is divided by 5?

What is the accurate representation of a Hydrated Proton in aqueous solution?

Of the given forms of Hydrogen, which is the most stable:

A 1.50g of an ore containing silver was dissolved and all of the Ag​​​​​+was converted into 0.24 g of Ag2S .what was the percentage of silver in the ore

Butanal and 2-methyl propanal are examples of which type of isomerism?

According to Einstein photoelectric effect equation, the graph between the kinetic energy of photoelectron ejected and the frequency (ν) of incidented radiations is:

What are polar and non-polar solvents?

Law of evaporation

The standard heat of formation of CH4(g), CO2(g) and H2O(g) are -76.2, -398.8 and -241.6 kJ mol−1 respectively. Calculate the amount of heat evolved by burning 1m3 of methane measured under normal conditions.

Define red shift and blue shift in light?

a weak acid HX has a dissociation constant 10^-5. the ph of 0.1M solution of this acid will be

A solution of glucose (molar mass = 180 g/mol) in water is labelled as 10% (by mass). what would be the molality and molarity of the solution?(density of solution = 1.2 g/mL)

Step 3 of an input is:94 brotula 77 suffix hallmark maintain 37 40 Which of the following will step 6?

In nucleophilic addition reactions, the reactivity of carbonyl compounds follows order -

Assuming complete precipitation of AgCl, calculate the sum of the molar concentration of all the ions if 2l of 2M Ag2SO4 is mixed with 4l of 1M NaCl solution is

Which is not true for physical adsorption?

One mole of PbS is oxidised to PbSO4 by H2O2. In this process, the number of electrons involved are [N0 = Avagadro number]

Why particles are not seen in colloids?

Which one of the following electyrolytes has the same value of van’t Hoff factor (i) as that of Al2(SO4)3 (if all are 100% ionized)?

Which type of defect is represented by the following figure?

The IUPAC name of

Which of the following is an oxidizing agent ?

Ksp of BaCrO4 is 2 × 10−10 at room temperature. Calculate the mass of Barium chromate lost by washing with three litres of water. Will the loss in mass depend on the quantity of precipitate?

An atom of an element contains 29 electrons and 35 neutrons. Deduce (i) the number of protons (ii) the electronic configuration of the element.

What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 4 to an energy level with n = 2?

Number of structural isomers possible for C6H14 and C7H16 are respectively?

If a &gt; b and b &gt; c, then,

Calculate the molality of 1 litre solution of 98% H2SO4 (weight/volume). The density of the solution is 1.88 g/mL.

An ester (A) with mol. formula C9H10O2 was treated with excess of CH3−Mg Br and the complex. So formed was treated with H2SO4 to give on olefin (B). Ozonolysis of (B) gave a ketone with molecular formula C8H8O which shows the iodoform test the structure of (a) is -

The boiling point of a solution made by dissolving 12.0 g of glucose in 100 g of water is 100.34∘C. Calculate the molecular weight of glucose; Kb for water =0.52∘C/m.

What are steroids and how do they differ from other derived lipids?

Specify the hybridization of the central atom in the following species respectively (N−3,NOCl,N2O):

P4O6 is hydrolysed to

Major product is :

For the system 3A + 2B ⇌ C, the expression for equilibrium constant is

Standard molar enthalpy of formation of CO2 is equal to

On going from right to left in a period in the periodic table the electronegativity of the elements

The total sum of number of pπ−dπ bonds in the following molecules. SO3,SO2,XeO4,IO−3

van der Waals' constant 'b' of Ar is 3.22×10−5m3mol−1.Calculate the molecular diameter(in nm) of Ar.

Which of the following options cannot be represented by the plot given below?

The structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is?

In a compound C,H &amp; N are present in the ratio of 18:2:7 by weight. The empirical formula of the compound is:

Consider following equilibrium at 400 K and 24 atm. 3A⇌2B+2C+D If the equilibrium pressure of A is 4 atm then Kc (in mol2 L−2) will be: (Take R=0.08 L atm K−1 mol−1)

One 11H atom weighs 1.6736 × 10−24 g. Express 11H atom's weight in amu.

I. CO II. PCl5 III. BF3 IV. BCl3 V. SiH4 VI. SiF4 VII. CCl4 VIII. BeCl2 IX. N(SiH3)3 X. H2O The number of molecules showing back bonding among the given molecules

One mole of O2 gas having a volume equal to 22.4 litres at 0∘C and 1 atmospheric pressure in compressed isothermally so that its volume reduces to 11.2 litres. The work done in this process is

A uniform metallic spherical shell is suspended from ceiling. It has two holes A and B at top and bottom respectively.

The vapour pressure of water at 80∘C is 355 mm of Hg. The total pressure of a 1 L vessel containing O2 saturated with water at 80∘C is 760 mm of Hg. The contents of the vessel are pumped into a 0.3 L vessel at the same temperature. What is the partial pressure of O2?

A 1.50g of an ore containing silver was dissolved and all of the Ag+was converted into 0.24 g of Ag2S .what was the percentage of silver in the ore

If a > b and b > c, then,

In a compound C,H & N are present in the ratio of 18:2:7 by weight. The empirical formula of the compound is: