46295 + Interview Questions in Chemistry

1.	The relationship between osmotic pressure at 273 K when 10 g glucose (P1), 10 g urea (P2) and 10 g sucrose (P3) are dissolved in 250 mL of water is:
Answer» The relationship between osmotic pressure at 273 K when 10 g glucose $(P_{1})$ , 10 g urea $(P_{2})$ and 10 g sucrose $(P_{3})$ are dissolved in 250 mL of water is:

Discussion

2.	Which of the following reaction don’t produce primary amines?
Answer» Which of the following reaction don’t produce primary amines?

Discussion

3.	The bond energies of C−C, C=C, H−H and C−H are 350, 600, 400 and 410 kJ/mol respectively. The heat of hydrogenation of ethylene is:
Answer» The bond energies of $C - C, C = C, H - H$ and $C - H$ are $350, 600, 400$ and $410 kJ/mol$ respectively. The heat of hydrogenation of ethylene is:

Discussion

4.	In the given set of reactions, 2 – Bromopropane AgCN−−−−−→alc./heatXLiA/H4−−−−−→Y The IUPAC name of product ‘Y’ is
Answer» In the given set of reactions, 2 – Bromopropane $A g C N - ---- \to a l c . / h e a t X L i A / H_{4} - ---- \to Y$ The IUPAC name of product ‘Y’ is

4.

In the given set of reactions, 2 – Bromopropane AgCN−−−−−→alc./heatXLiA/H4−−−−−→Y The IUPAC name of product ‘Y’ is

Answer»

In the given set of reactions, 2 – Bromopropane

$A g C N - ---- \to a l c . / h e a t X L i A / H_{4} - ---- \to Y$

The IUPAC name of product ‘Y’ is

Discussion

5.	In a solid AB that has a rock salt structure, B atoms occupy the corners of the cubic unit cell. If all the face centred atoms along one of the axis are removed, then the stoichiometry of the resultant structure will be:
Answer» In a solid AB that has a rock salt structure, B atoms occupy the corners of the cubic unit cell. If all the face centred atoms along one of the axis are removed, then the stoichiometry of the resultant structure will be:

Discussion

6.	When 2-bromobutane reacts with alcoholic KOH, the reaction is
Answer» When 2-bromobutane reacts with alcoholic KOH, the reaction is

Discussion

7.	Oxygen is available in plenty in the air yet fuels do not burn by themselves at room temperature. Explain.
Answer» Oxygen is available in plenty in the air yet fuels do not burn by themselves at room temperature. Explain.

Discussion

8.	Sodium salts of some acids are very useful as food preservatives. Suggest a few such acids.
Answer» Sodium salts of some acids are very useful as food preservatives. Suggest a few such acids.

Discussion

9.	A sample of calcium carbonate (CaCO3) has the following percentage composition Ca=40%;C=12%;O=48% If the law of constant proportions is true, then the weight of calcium in 4 g of a sample of calcium carbonate from another source will be
Answer» A sample of calcium carbonate $(C a C O_{3})$ has the following percentage composition $C a = 40 %; C = 12 %; O = 48 %$ If the law of constant proportions is true, then the weight of calcium in $4 g$ of a sample of calcium carbonate from another source will be

Discussion

10.	When phenyl magnesium bromide reacts with tertiary butyl alcohol, the product formed would be
Answer» When phenyl magnesium bromide reacts with tertiary butyl alcohol, the product formed would be

Discussion

11.	The most acidic carboxylic acid among the following is:
Answer» The most acidic carboxylic acid among the following is:

Discussion

12.	0.1 N K2C2O4.3H2C2O4.4H2O solution reacts completely with 20 ml of 0.05 M KMnO4 solution in acidic medium. Another sample of the same solution of K2C2O4.3H2C2O4.4H2O having the same volume is titrated with 18 M NaOH solution. Then, the volume of NaOH solution (in ml) required for titration is:
Answer» $0.1 N K_{2} C_{2} O_{4} .3 H_{2} C_{2} O_{4} .4 H_{2} O$ solution reacts completely with $20 ml of 0.05 M$ $K M n O_{4}$ solution in acidic medium. Another sample of the same solution of $K_{2} C_{2} O_{4} .3 H_{2} C_{2} O_{4} .4 H_{2} O$ having the same volume is titrated with $\frac{1}{8} M N a O H$ solution. Then, the volume of $N a O H$ solution (in ml) required for titration is:

Discussion

13.	A monoatomic ideal gas follows the process: TV32= constant The molar specific heat for this process is (5Ry), where R is the gas constant. Find the value of y. (Answer upto two digit after decimal point)
Answer» A monoatomic ideal gas follows the process: $T V^{\frac{3}{2}} =$ constant The molar specific heat for this process is $(\frac{5 R}{y})$ , where R is the gas constant. Find the value of $y$ . (Answer upto two digit after decimal point)

Discussion

14.	Pyrosilicate ion is:
Answer» Pyrosilicate ion is:

Discussion

15.	In which of the following, the O−N−O bond angle is highest :
Answer» In which of the following, the $O - N - O$ bond angle is highest :

Discussion

16.	An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure. The efficiency of the gas cycle is
Answer» An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure. The efficiency of the gas cycle is

16.

An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure. The efficiency of the gas cycle is

Answer»

An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure. The efficiency of the gas cycle is

Discussion

17.	1 L of a N2HCl solution is heated in a beaker. It was observed that when the volume of the solution was reduced to 600 mL, 3.25 g of HCl is lost. Calculate the normality of the new solution.
Answer» $1 L$ of a $\frac{N}{2} H C l$ solution is heated in a beaker. It was observed that when the volume of the solution was reduced to $600 mL$ , $3.25 g$ of $H C l$ is lost. Calculate the normality of the new solution.

Discussion

18.	Most stable carbanion is
Answer» Most stable carbanion is

18.

Most stable carbanion is

Answer»

Most stable carbanion is

Discussion

19.	Which of the following is/are carbocation(s)?
Answer» Which of the following is/are carbocation(s)?

Discussion

20.	A and B in the following reactions are Identify A and B ?
Answer» A and B in the following reactions are Identify A and B ?

Discussion

21.	Write the equations involved in the following reactions : (i) Reimer - Tiemann reaction (ii) Williamson's ether synthesis
Answer» Write the equations involved in the following reactions : (i) Reimer - Tiemann reaction (ii) Williamson's ether synthesis

Discussion

22.	Why NO2 shows -M effect.
Answer» Why NO2 shows -M effect.

Discussion

23.	The cause of periodicity of properties is
Answer» The cause of periodicity of properties is

Discussion

24.	The ionization enthalpy of hydrogen atom is 1.312×106 Jmol−1. The energy required to excite the atom from n = 1 to n = 2 is:
Answer» The ionization enthalpy of hydrogen atom is $1.312 \times 10^{6} J m o l^{- 1}$ . The energy required to excite the atom from n = 1 to n = 2 is:

Discussion

25.	10 mole of ideal gas expand isothermally and reversibly from a pressure of 10 atm to 1 atm at 300 K. What is the largest mass which can lifted through a height of 100 meter?
Answer» 10 mole of ideal gas expand isothermally and reversibly from a pressure of 10 atm to 1 atm at 300 K. What is the largest mass which can lifted through a height of 100 meter?

Discussion

26.	A student was given Water, Benzene, Orange juice, and Glycerol to pipette out in four different beakers. The liquid that will be relatively difficult to be sucked into the pipette will be:
Answer» A student was given Water, Benzene, Orange juice, and Glycerol to pipette out in four different beakers. The liquid that will be relatively difficult to be sucked into the pipette will be:

Discussion

27.	The circulation of blood in human body supplies O2 and releases CO2. The concentration of O2 and CO2 is variable but on an average, 100 mL blood contains 0.02 g of O2 and 0.08 g of CO2. The volume of O2 and CO2 at 1 atm and at body temperature 37∘ C, assuming 10 L blood in human body, is
Answer» The circulation of blood in human body supplies $O_{2}$ and releases $C O_{2}$ . The concentration of $O_{2}$ and $C O_{2}$ is variable but on an average, $100 mL$ blood contains $0.02 g$ of $O_{2}$ and $0.08 g$ of $C O_{2}$ . The volume of $O_{2}$ and $C O_{2}$ at $1 atm$ and at body temperature $37^{\circ} C$ , assuming $10 L$ blood in human body, is

Discussion

28.	1 gram of ice is mixed with 1 gram of steam. At thermal equilibrium, the temperature of the mixture is
Answer» 1 gram of ice is mixed with 1 gram of steam. At thermal equilibrium, the temperature of the mixture is

Discussion

29.	The base imidazole has a Kb of 9.8×10−8 at 25∘ C. In what ratio of volumes should 0.02 M HCl and 0.02 M imidazole be mixed to make 100 ml of a buffer at pH 7 ?
Answer» The base imidazole has a $K_{b}$ of $9.8 \times 10^{- 8}$ at $25^{\circ}$ C. In what ratio of volumes should 0.02 M HCl and 0.02 M imidazole be mixed to make 100 ml of a buffer at pH 7 ?

29.

The base imidazole has a Kb of 9.8×10−8 at 25∘ C. In what ratio of volumes should 0.02 M HCl and 0.02 M imidazole be mixed to make 100 ml of a buffer at pH 7 ?

Answer»

The base imidazole has a $K_{b}$ of $9.8 \times 10^{- 8}$ at $25^{\circ}$ C.

In what ratio of volumes should 0.02 M HCl and 0.02 M imidazole be mixed to make 100 ml of a buffer at pH 7 ?

Discussion

30.	Which of the following conditions are not suitable for liquefaction of gases?
Answer» Which of the following conditions are not suitable for liquefaction of gases?

Discussion

31.	A 3:2 molar ratio mixture of FeO and Fe2O3 react with oxygen to produce a 2:3 molar ratio mixture of FeO and Fe2O3. Find the mass (in g) of O2 gas required per mole of the initial mixture.
Answer» A $3 : 2$ molar ratio mixture of $F e O$ and $F e_{2} O_{3}$ react with oxygen to produce a $2 : 3$ molar ratio mixture of $F e O$ and $F e_{2} O_{3}$ . Find the mass (in g) of $O_{2}$ gas required per mole of the initial mixture.

Discussion

32.	The increasing order of reactivity of the following compounds in SN2 reaction is
Answer» The increasing order of reactivity of the following compounds in $S_{N} 2$ reaction is

Discussion

33.	For the redox reaction, xC2O−24+yMnO−4+zH+→yMn+2+z2H2O+2xCO2 x, y and z respectively are:
Answer» For the redox reaction, $x C_{2} O_{4}^{- 2} + y M n O_{4}^{-} + z H^{+} \to y M n^{+ 2} + \frac{z}{2} H_{2} O + 2 x C O_{2}$ x, y and z respectively are:

Discussion

34.	Find the work done (in kJ) when one mole of the gas is expanded reversibly and isothermally from 5 atm to 1 atm at 25oC.
Answer» Find the work done (in $k J$ ) when one mole of the gas is expanded reversibly and isothermally from $5 a t m$ to $1 a t m$ at $25^{o} C$ .

Discussion

35.	The noble gases have closed-shell electronic configuration and are monoatomic gases used normal conditions. The low boiling points of the lighter noble gases are due to weak dispersion forces between the atoms and the absence of other interatomic interactions. The direct reaction of xenon with fluorine leads to a series of compounds with oxidation number +2, +4 and +6. XeF4 reacts violently with water to give XeO3. The compounds of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell. The structure of XeO3 is
Answer» The noble gases have closed-shell electronic configuration and are monoatomic gases used normal conditions. The low boiling points of the lighter noble gases are due to weak dispersion forces between the atoms and the absence of other interatomic interactions. The direct reaction of xenon with fluorine leads to a series of compounds with oxidation number +2, +4 and +6. $X e F_{4}$ reacts violently with water to give $X e O_{3}$ . The compounds of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell. The structure of $X e O_{3}$ is

Discussion

36.	Two glass bulbs of equal volume are connected by a narrow tube and are filled with a gas at 0∘C and a pressure of 76 cm of mercury. One of the bulbs is then placed in melting ice and the other is placed in a water bath maintained at 62∘C. What will be the new pressure (in cm of Hg) in the tube? (Answer upto two decimal places)
Answer» Two glass bulbs of equal volume are connected by a narrow tube and are filled with a gas at $0^{\circ} C$ and a pressure of 76 cm of mercury. One of the bulbs is then placed in melting ice and the other is placed in a water bath maintained at $62^{\circ} C$ . What will be the new pressure (in cm of Hg) in the tube? (Answer upto two decimal places)

Discussion

37.	What are the correct species present in KHF2?
Answer» What are the correct species present in $K H F_{2}$ ?

Discussion

38.	The vapour density of a mixture of NO2 and N2O4 at 27∘C is 36.8. How many moles of NO2 will be present in 92 g of the mixture?
Answer» The vapour density of a mixture of $N O_{2}$ and $N_{2} O_{4}$ at $27^{\circ} C$ is 36.8. How many moles of $N O_{2}$ will be present in $92 g$ of the mixture?

Discussion

39.	Find the degree measure corresponding to -4 radian measure
Answer» Find the degree measure corresponding to -4 radian measure

Discussion

40.	The number of atoms in 1 mL of ammonia gas at STP is:
Answer» The number of atoms in $1 mL$ of ammonia gas at STP is:

Discussion

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

Discussion

42.	Can you please explain me the langmuir isotherm at low and high pressure what happens to the term aP/1+bP!and how those terms are neglected! Please elaborate it nicely and explain Thanks and regards, Vineet
Answer» Can you please explain me the langmuir isotherm at low and high pressure what happens to the term aP/1+bP!and how those terms are neglected! Please elaborate it nicely and explain Thanks and regards, Vineet

42.

Can you please explain me the langmuir isotherm at low and high pressure what happens to the term aP/1+bP!and how those terms are neglected! Please elaborate it nicely and explain Thanks and regards, Vineet

Answer»

Can you please explain me the langmuir isotherm at low and high pressure what happens to the term aP/1+bP!and how those terms are neglected! Please elaborate it nicely and explain

Thanks and regards,

Vineet

Discussion

43.	The I.E1 of an element M(g) is 6000 kJ/mol. The ratio of I.E2I.E3 is 3 : 2. If ΔH for conversion, M(g)→M3+(g) is 10000 kJ/mol, what is the value of I.E2 and I.E3 respectively (in kJ/mol)? (I.E1= first ionization energy, I.E2= second ionization energy and I.E3= third ionization energy)
Answer» The $I . E_{1}$ of an element M(g) is 6000 kJ/mol. The ratio of $\frac{I . E_{2}}{I . E_{3}}$ is 3 : 2. If $Δ H$ for conversion, $M (g) \to M^{3 +} (g)$ is 10000 kJ/mol, what is the value of $I . E_{2}$ and $I . E_{3}$ respectively (in kJ/mol)? ( $I . E_{1} =$ first ionization energy, $I . E_{2} =$ second ionization energy and $I . E_{3} =$ third ionization energy)

Discussion

44.	The molarity of 0.006 mole of NaCl in 100ml solution is:
Answer» The molarity of 0.006 mole of NaCl in 100ml solution is:

Discussion

45.	H3BO3 is
Answer» $H_{3} B O_{3}$ is

Discussion

46.	Which of the following is the correct expression of ΔS for an isobaric process?
Answer» Which of the following is the correct expression of $Δ S$ for an isobaric process?

Discussion

47.	When ice melts into water, entropy:
Answer» When ice melts into water, entropy:

Discussion

48.	The compound which contains both ionic and covalent bond is
Answer» The compound which contains both ionic and covalent bond is

Discussion

49.	Consider the setup represented in the figure below. If heat is added to the gas by increasing the thermal reservoir's temperature from 200 K to 400 K, calculate the work done by the gas. Initial condition: pressure = 1 atm; volume = 1×10−3 m3.
Answer» Consider the setup represented in the figure below. If heat is added to the gas by increasing the thermal reservoir's temperature from 200 K to 400 K, calculate the work done by the gas. Initial condition: pressure = 1 atm; volume = $1 \times 10^{- 3} m^{3}$ .

49.

Consider the setup represented in the figure below. If heat is added to the gas by increasing the thermal reservoir's temperature from 200 K to 400 K, calculate the work done by the gas. Initial condition: pressure = 1 atm; volume = 1×10−3 m3.

Answer»

Consider the setup represented in the figure below. If heat is added to the gas by increasing the thermal reservoir's temperature from 200 K to 400 K, calculate the work done by the gas.

Initial condition: pressure = 1 atm; volume = $1 \times 10^{- 3} m^{3}$ .

Discussion

50.	Explain the method for determination of standard half-cell potential.
Answer» Explain the method for determination of standard half-cell potential.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The relationship between osmotic pressure at 273 K when 10 g glucose (P1), 10 g urea (P2) and 10 g sucrose (P3) are dissolved in 250 mL of water is:

Which of the following reaction don’t produce primary amines?

The bond energies of C−C, C=C, H−H and C−H are 350, 600, 400 and 410 kJ/mol respectively. The heat of hydrogenation of ethylene is:

In the given set of reactions, 2 – Bromopropane AgCN−−−−−→alc./heatXLiA/H4−−−−−→Y The IUPAC name of product ‘Y’ is

In a solid AB that has a rock salt structure, B atoms occupy the corners of the cubic unit cell. If all the face centred atoms along one of the axis are removed, then the stoichiometry of the resultant structure will be:

When 2-bromobutane reacts with alcoholic KOH, the reaction is

Oxygen is available in plenty in the air yet fuels do not burn by themselves at room temperature. Explain.

Sodium salts of some acids are very useful as food preservatives. Suggest a few such acids.

A sample of calcium carbonate (CaCO3) has the following percentage composition Ca=40%;C=12%;O=48% If the law of constant proportions is true, then the weight of calcium in 4 g of a sample of calcium carbonate from another source will be

When phenyl magnesium bromide reacts with tertiary butyl alcohol, the product formed would be

The most acidic carboxylic acid among the following is:

0.1 N K2C2O4.3H2C2O4.4H2O solution reacts completely with 20 ml of 0.05 M KMnO4 solution in acidic medium. Another sample of the same solution of K2C2O4.3H2C2O4.4H2O having the same volume is titrated with 18 M NaOH solution. Then, the volume of NaOH solution (in ml) required for titration is:

A monoatomic ideal gas follows the process: TV32= constant The molar specific heat for this process is (5Ry), where R is the gas constant. Find the value of y. (Answer upto two digit after decimal point)

Pyrosilicate ion is:

In which of the following, the O−N−O bond angle is highest :

An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure. The efficiency of the gas cycle is

1 L of a N2HCl solution is heated in a beaker. It was observed that when the volume of the solution was reduced to 600 mL, 3.25 g of HCl is lost. Calculate the normality of the new solution.

Most stable carbanion is

Which of the following is/are carbocation(s)?

A and B in the following reactions are Identify A and B ?

Write the equations involved in the following reactions : (i) Reimer - Tiemann reaction (ii) Williamson's ether synthesis

Why NO2 shows -M effect.

The cause of periodicity of properties is

The ionization enthalpy of hydrogen atom is 1.312×106 Jmol−1. The energy required to excite the atom from n = 1 to n = 2 is:

10 mole of ideal gas expand isothermally and reversibly from a pressure of 10 atm to 1 atm at 300 K. What is the largest mass which can lifted through a height of 100 meter?

A student was given Water, Benzene, Orange juice, and Glycerol to pipette out in four different beakers. The liquid that will be relatively difficult to be sucked into the pipette will be:

The circulation of blood in human body supplies O2 and releases CO2. The concentration of O2 and CO2 is variable but on an average, 100 mL blood contains 0.02 g of O2 and 0.08 g of CO2. The volume of O2 and CO2 at 1 atm and at body temperature 37∘ C, assuming 10 L blood in human body, is

1 gram of ice is mixed with 1 gram of steam. At thermal equilibrium, the temperature of the mixture is

The base imidazole has a Kb of 9.8×10−8 at 25∘ C. In what ratio of volumes should 0.02 M HCl and 0.02 M imidazole be mixed to make 100 ml of a buffer at pH 7 ?

Which of the following conditions are not suitable for liquefaction of gases?

A 3:2 molar ratio mixture of FeO and Fe2O3 react with oxygen to produce a 2:3 molar ratio mixture of FeO and Fe2O3. Find the mass (in g) of O2 gas required per mole of the initial mixture.

The increasing order of reactivity of the following compounds in SN2 reaction is

For the redox reaction, xC2O−24+yMnO−4+zH+→yMn+2+z2H2O+2xCO2 x, y and z respectively are:

Find the work done (in kJ) when one mole of the gas is expanded reversibly and isothermally from 5 atm to 1 atm at 25oC.

What are the correct species present in KHF2?

The vapour density of a mixture of NO2 and N2O4 at 27∘C is 36.8. How many moles of NO2 will be present in 92 g of the mixture?

Find the degree measure corresponding to -4 radian measure

The number of atoms in 1 mL of ammonia gas at STP is:

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

Can you please explain me the langmuir isotherm at low and high pressure what happens to the term aP/1+bP!and how those terms are neglected! Please elaborate it nicely and explain Thanks and regards, Vineet

The I.E1 of an element M(g) is 6000 kJ/mol. The ratio of I.E2I.E3 is 3 : 2. If ΔH for conversion, M(g)→M3+(g) is 10000 kJ/mol, what is the value of I.E2 and I.E3 respectively (in kJ/mol)? (I.E1= first ionization energy, I.E2= second ionization energy and I.E3= third ionization energy)

The molarity of 0.006 mole of NaCl in 100ml solution is:

H3BO3 is

Which of the following is the correct expression of ΔS for an isobaric process?

When ice melts into water, entropy:

The compound which contains both ionic and covalent bond is

Consider the setup represented in the figure below. If heat is added to the gas by increasing the thermal reservoir's temperature from 200 K to 400 K, calculate the work done by the gas. Initial condition: pressure = 1 atm; volume = 1×10−3 m3.

Explain the method for determination of standard half-cell potential.