46295 + Interview Questions in Chemistry

1.	Why are solids incompressible ?
Answer» Why are solids incompressible ?

Discussion

2.	If a = b = c and α=β=γ=90∘ (the Axial angular characteristics) then it represents which crystal system?
Answer» If a = b = c and $α = β = γ = 90^{\circ}$ (the Axial angular characteristics) then it represents which crystal system?

Discussion

3.	A current of 10.0A is passed through 1.0 L of 1.0 M HCl solution for 965 seconds pH of the solution at the end of the experiment is
Answer» A current of 10.0A is passed through 1.0 L of 1.0 M HCl solution for 965 seconds pH of the solution at the end of the experiment is

Discussion

4.	Identify the starting material of the following reaction:
Answer» Identify the starting material of the following reaction:

Discussion

5.	Assertion: Frenkel defect doesn’t have any effect on density of the crystal. Reason: Dislocated cation occupies the interstitial site
Answer» Assertion: Frenkel defect doesn’t have any effect on density of the crystal. Reason: Dislocated cation occupies the interstitial site

5.

Assertion: Frenkel defect doesn’t have any effect on density of the crystal. Reason: Dislocated cation occupies the interstitial site

Answer»

Assertion: Frenkel defect doesn’t have any effect on density of the crystal.

Reason: Dislocated cation occupies the interstitial site

Discussion

6.	Ethane to bromoethane
Answer» Ethane to bromoethane

Discussion

7.	Langmuir adsorption isotherm is deduced using the assumption
Answer» Langmuir adsorption isotherm is deduced using the assumption

Discussion

8.	A solution of protein (extracted from crabs) was prepared by dissolving 0.75 in 125 cm3 of an aqueous solution. At 4°C an osmotic pressure rise of 2.6 mm of the solution was observed. Then molecular weight of protein is ( Assume density of solution is 1.00 g/cm3)
Answer» A solution of protein (extracted from crabs) was prepared by dissolving 0.75 in 125 cm3 of an aqueous solution. At 4°C an osmotic pressure rise of 2.6 mm of the solution was observed. Then molecular weight of protein is ( Assume density of solution is 1.00 g/cm3)

Discussion

9.	Oxidation number of carbon in C3O2 ,Mg2C3,are respectively
Answer» Oxidation number of carbon in $C_{3} O_{2}$ , $M g_{2} C_{3}$ ,are respectively

Discussion

10.	Compare the carbon-carbon bond rotation across the compounds A, B and C:
Answer» Compare the carbon-carbon bond rotation across the compounds A, B and C:

Discussion

11.	At 25∘C the pH of a 10−8 molar solution of HCl in water is
Answer» At $25^{\circ}$ C the pH of a $10^{- 8}$ molar solution of HCl in water is

Discussion

12.	How many grams of NaOH should be dissolved to make 100cm^3 of 0.15 molar sodium hydroxide solution?
Answer» How many grams of NaOH should be dissolved to make 100cm^3 of 0.15 molar sodium hydroxide solution?

Discussion

13.	For a gas sample which shows negligible expansion on heating,
Answer» For a gas sample which shows negligible expansion on heating,

Discussion

14.	In which of the following adduct is formed most easily?
Answer» In which of the following adduct is formed most easily?

Discussion

15.	What would be the formula of metal halide if successive ionisation energies of metal are 5eV, 50eV, 68eV, 90 eV and 120eV?
Answer» What would be the formula of metal halide if successive ionisation energies of metal are 5eV, 50eV, 68eV, 90 eV and 120eV?

Discussion

16.	Photoelectric emission is observed from a metal surface when the metal is subjected to radiations of incident frequencies ν1 and ν2 (where ν1>ν2). If the kinetic energies of the photoelectrons emitted in the two cases are in the ratio 2:1, then the threshold frequency v0 of the metal is:
Answer» Photoelectric emission is observed from a metal surface when the metal is subjected to radiations of incident frequencies $ν_{1}$ and $ν_{2}$ (where $ν_{1} > ν_{2}$ ). If the kinetic energies of the photoelectrons emitted in the two cases are in the ratio $2 : 1$ , then the threshold frequency $v_{0}$ of the metal is:

Discussion

17.	How much current is required to deposit 0.195g of elemental Pt from a solution containing [PtCl6]2− ion with a time period of 2 hrs? (Atomic Mass of Pt = 195)
Answer» How much current is required to deposit 0.195g of elemental Pt from a solution containing $[P t C l_{6}]^{2 -}$ ion with a time period of 2 hrs? (Atomic Mass of Pt = 195)

Discussion

18.	Ti+3 is purple, but Ti+4 is colourless. This is because
Answer» $T i^{+ 3}$ is purple, but $T i^{+ 4}$ is colourless. This is because

Discussion

19.	Which of the following is not a nucleophile?
Answer» Which of the following is not a nucleophile?

Discussion

20.	If an atom is present in the centre of the cube, the participation of that atom per unit cell is
Answer» If an atom is present in the centre of the cube, the participation of that atom per unit cell is

Discussion

21.	The standard molar enthalpies of formation of cyclohexane(l) and benzene(l) at 25oC are −156 and +49 kJ mol−1 respectively. The standard enthalpy of hydogenation of cyclohexene(l) at 25oC is −119 kJ mol−1. Use these data to estimate the magnitude of resonance energy of benzene in kJ/mol.
Answer» The standard molar enthalpies of formation of cyclohexane $(l)$ and benzene $(l)$ at $25^{o} C$ are $- 156$ and $+ 49$ $k J m o l^{- 1}$ respectively. The standard enthalpy of hydogenation of cyclohexene $(l)$ at $25^{o} C$ is $- 119 k J m o l^{- 1}$ . Use these data to estimate the magnitude of resonance energy of benzene in $k J / m o l$ .

Discussion

22.	Where a,b,c,d,e,f,g,h are 3rd period elements. If difference between atomic numbers of elements b and e is x and difference between atomic numbers of elements c and f is y. What is the value of x - y.
Answer» Where $a, b, c, d, e, f, g, h$ are 3rd period elements. If difference between atomic numbers of elements b and e is x and difference between atomic numbers of elements c and f is y. What is the value of x - y.

Discussion

23.	List two tests for experimentally distinguishing alcohol and carboxylic acids.
Answer» List two tests for experimentally distinguishing alcohol and carboxylic acids.

Discussion

24.	How can we find the number of unpaired electrons in a given element?
Answer» How can we find the number of unpaired electrons in a given element?

Discussion

25.	For a reaction ΔH = 9.08 kJ mol−1 and ΔS = 35.7 JK−1 mol−1 Which of the following statements is correct for the reaction
Answer» For a reaction $Δ H = 9.08 k J m o l^{- 1}$ and $Δ S = 35.7 J K^{- 1} m o l^{- 1}$ Which of the following statements is correct for the reaction

Discussion

26.	Which has higher dipole moment?
Answer» Which has higher dipole moment?

Discussion

27.	Which of the following statements related to the modern periodic table is incorrect?
Answer» Which of the following statements related to the modern periodic table is incorrect?

Discussion

28.	When benzene sulphonic acid and p-nitrophenol are treated with NaHCO3, the gases released, respectively, are:
Answer» When benzene sulphonic acid and p-nitrophenol are treated with $N a H C O_{3},$ the gases released, respectively, are:

Discussion

29.	How much time is required for the complete decomposition of two moles of water using a current of 4 A.
Answer» How much time is required for the complete decomposition of two moles of water using a current of 4 A.

Discussion

30.	Assuming complete ionization, calculate freezing point of solution prepared by adding 6g Glauber's salt Na2SO4.10H2O in 0.1 kg of water ?(Given Kf = 1.86 K kg/mol , Atomic masses, Na=23,O=16,S=32,H=1 )
Answer» Assuming complete ionization, calculate freezing point of solution prepared by adding 6g Glauber's salt ${N a}_{2} S O_{4} .10 H_{2} O$ in 0.1 kg of water ?(Given $K_{f}$ = 1.86 K kg/mol , Atomic masses, $N a = 23, O = 16, S = 32, H = 1$ )

Discussion

31.	Balance the reaction using half reaction methodMnO−4 + SO2−4 ⟶ Mn2+ + HSO−4
Answer» Balance the reaction using half reaction method $M n O_{4}^{-}$ $+$ $S O_{4}^{2 -}$ $⟶$ $M n^{2 +}$ $+$ $H S O_{4}^{-}$

31.

Balance the reaction using half reaction methodMnO−4 + SO2−4 ⟶ Mn2+ + HSO−4

Answer»

Balance the reaction using half reaction method

$M n O_{4}^{-}$ $+$ $S O_{4}^{2 -}$ $⟶$ $M n^{2 +}$ $+$ $H S O_{4}^{-}$

Discussion

32.	Of the following 0.10 m aqueous solution, which one will exhibit the largest freezing point depression?
Answer» Of the following 0.10 m aqueous solution, which one will exhibit the largest freezing point depression?

Discussion

33.	The shape of covalent molecule MX3 is
Answer» The shape of covalent molecule $M X_{3}$ is

Discussion

34.	The amount of ice that will separate out on cooling a solution containing 50 gram of Ethylene glycol in 200 gram water to -9.30C (Kf=1.86K/molal)
Answer» The amount of ice that will separate out on cooling a solution containing 50 gram of Ethylene glycol in 200 gram water to -9.3⁰C (K_f=1.86K/molal)

34.

The amount of ice that will separate out on cooling a solution containing 50 gram of Ethylene glycol in 200 gram water to -9.30C (Kf=1.86K/molal)

Answer»

The amount of ice that will separate out on cooling a solution containing 50 gram of Ethylene glycol in 200 gram water to -9.3⁰C

(K_f=1.86K/molal)

Discussion

35.	What is the significance of even odd series in Mendeleev periodic table?
Answer» What is the significance of even odd series in Mendeleev periodic table?

Discussion

36.	How to find the electronegativity of a particular element ? Suppose how to find the electronegativity of chlorine and nitrogen?? Please explain.
Answer» How to find the electronegativity of a particular element ? Suppose how to find the electronegativity of chlorine and nitrogen?? Please explain.

Discussion

37.	Are covalent radius vanderwall radius and metallic radius are the types of atomic radius?
Answer» Are covalent radius vanderwall radius and metallic radius are the types of atomic radius?

Discussion

38.	What is meissner's effect ? Write the value of magnetic permeability for perfect diamagnetism.
Answer» What is meissner's effect ? Write the value of magnetic permeability for perfect diamagnetism.

Discussion

39.	Noble gases have positive electron gain enthalpy.Explain
Answer» Noble gases have positive electron gain enthalpy.Explain

Discussion

40.	4L of 0.02M aqueous solution of NaCl was diluted by adding 1L of water. The molality of the sol. Is
Answer» 4L of 0.02M aqueous solution of NaCl was diluted by adding 1L of water. The molality of the sol. Is

Discussion

41.	1 mole is equal to how many electrons
Answer» 1 mole is equal to how many electrons

Discussion

42.	We can classify chemical substances as acids,base so or salts. Can be classify elements and compounds as acids bases or salts?
Answer» We can classify chemical substances as acids,base so or salts. Can be classify elements and compounds as acids bases or salts?

Discussion

43.	112ml of oxygen at STP is subjected to liquefication . The mass of liquid oxygen obtained is??
Answer» 112ml of oxygen at STP is subjected to liquefication . The mass of liquid oxygen obtained is??

Discussion

44.	Write the IUPAC name of the given compound.
Answer» Write the IUPAC name of the given compound.

44.

Write the IUPAC name of the given compound.

Answer»

Write the IUPAC name of the given compound.

Discussion

45.	Calculate the pH of solution obtained by mixing 10ml of 0.2M HCL and 40ml of 0.1M H2SO4.
Answer» Calculate the pH of solution obtained by mixing 10ml of 0.2M HCL and 40ml of 0.1M H2SO4.

Discussion

46.	Allyl chloride on dehydrochlorination gives
Answer» Allyl chloride on dehydrochlorination gives

Discussion

47.	The density of elements of 3d series across a period:
Answer» The density of elements of 3d series across a period:

Discussion

48.	Which of the following is a pair of metamers?
Answer» Which of the following is a pair of metamers?

Discussion

49.	How to test for presence of Potassium and Sodium in Shampoo? This is for a investigative project.
Answer» How to test for presence of Potassium and Sodium in Shampoo? This is for a investigative project.

Discussion

50.	In chemistry, in the chapter hydrocarbons, R-CH=CH2when reacted in the presence of Hg(OAc)2 H2O.THF gives R-CHOH-CH2HgOAc + AcOH here, what is the meaning of OAc??????
Answer» In chemistry, in the chapter hydrocarbons, R-CH=CH₂when reacted in the presence of Hg(OAc)₂H₂O.THF gives R-CHOH-CH₂HgOAc + AcOH here, what is the meaning of OAc??????

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why are solids incompressible ?

If a = b = c and α=β=γ=90∘ (the Axial angular characteristics) then it represents which crystal system?

A current of 10.0A is passed through 1.0 L of 1.0 M HCl solution for 965 seconds pH of the solution at the end of the experiment is

Identify the starting material of the following reaction:

Assertion: Frenkel defect doesn’t have any effect on density of the crystal. Reason: Dislocated cation occupies the interstitial site

Ethane to bromoethane

Langmuir adsorption isotherm is deduced using the assumption

A solution of protein (extracted from crabs) was prepared by dissolving 0.75 in 125 cm3 of an aqueous solution. At 4°C an osmotic pressure rise of 2.6 mm of the solution was observed. Then molecular weight of protein is ( Assume density of solution is 1.00 g/cm3)

Oxidation number of carbon in C3O2 ,Mg2C3,are respectively

Compare the carbon-carbon bond rotation across the compounds A, B and C:

At 25∘C the pH of a 10−8 molar solution of HCl in water is

How many grams of NaOH should be dissolved to make 100cm^3 of 0.15 molar sodium hydroxide solution?

For a gas sample which shows negligible expansion on heating,

In which of the following adduct is formed most easily?

What would be the formula of metal halide if successive ionisation energies of metal are 5eV, 50eV, 68eV, 90 eV and 120eV?

Photoelectric emission is observed from a metal surface when the metal is subjected to radiations of incident frequencies ν1 and ν2 (where ν1&gt;ν2). If the kinetic energies of the photoelectrons emitted in the two cases are in the ratio 2:1, then the threshold frequency v0 of the metal is:

How much current is required to deposit 0.195g of elemental Pt from a solution containing [PtCl6]2− ion with a time period of 2 hrs? (Atomic Mass of Pt = 195)

Ti+3 is purple, but Ti+4 is colourless. This is because

Which of the following is not a nucleophile?

If an atom is present in the centre of the cube, the participation of that atom per unit cell is

The standard molar enthalpies of formation of cyclohexane(l) and benzene(l) at 25oC are −156 and +49 kJ mol−1 respectively. The standard enthalpy of hydogenation of cyclohexene(l) at 25oC is −119 kJ mol−1. Use these data to estimate the magnitude of resonance energy of benzene in kJ/mol.

Where a,b,c,d,e,f,g,h are 3rd period elements. If difference between atomic numbers of elements b and e is x and difference between atomic numbers of elements c and f is y. What is the value of x - y.

List two tests for experimentally distinguishing alcohol and carboxylic acids.

How can we find the number of unpaired electrons in a given element?

For a reaction ΔH = 9.08 kJ mol−1 and ΔS = 35.7 JK−1 mol−1 Which of the following statements is correct for the reaction

Which has higher dipole moment?

Which of the following statements related to the modern periodic table is incorrect?

When benzene sulphonic acid and p-nitrophenol are treated with NaHCO3, the gases released, respectively, are:

How much time is required for the complete decomposition of two moles of water using a current of 4 A.

Assuming complete ionization, calculate freezing point of solution prepared by adding 6g Glauber's salt Na2SO4.10H2O in 0.1 kg of water ?(Given Kf = 1.86 K kg/mol , Atomic masses, Na=23,O=16,S=32,H=1 )

Balance the reaction using half reaction methodMnO−4 + SO2−4 ⟶ Mn2+ + HSO−4

Of the following 0.10 m aqueous solution, which one will exhibit the largest freezing point depression?

The shape of covalent molecule MX3 is

The amount of ice that will separate out on cooling a solution containing 50 gram of Ethylene glycol in 200 gram water to -9.30C (Kf=1.86K/molal)

What is the significance of even odd series in Mendeleev periodic table?

How to find the electronegativity of a particular element ? Suppose how to find the electronegativity of chlorine and nitrogen?? Please explain.

Are covalent radius vanderwall radius and metallic radius are the types of atomic radius?

What is meissner's effect ? Write the value of magnetic permeability for perfect diamagnetism.

Noble gases have positive electron gain enthalpy.Explain

4L of 0.02M aqueous solution of NaCl was diluted by adding 1L of water. The molality of the sol. Is

1 mole is equal to how many electrons

We can classify chemical substances as acids,base so or salts. Can be classify elements and compounds as acids bases or salts?

112ml of oxygen at STP is subjected to liquefication . The mass of liquid oxygen obtained is??

Write the IUPAC name of the given compound.

Calculate the pH of solution obtained by mixing 10ml of 0.2M HCL and 40ml of 0.1M H2SO4.

Allyl chloride on dehydrochlorination gives

The density of elements of 3d series across a period:

Which of the following is a pair of metamers?

How to test for presence of Potassium and Sodium in Shampoo? This is for a investigative project.

In chemistry, in the chapter hydrocarbons, R-CH=CH2when reacted in the presence of Hg(OAc)2 H2O.THF gives R-CHOH-CH2HgOAc + AcOH here, what is the meaning of OAc??????

Photoelectric emission is observed from a metal surface when the metal is subjected to radiations of incident frequencies ν1 and ν2 (where ν1>ν2). If the kinetic energies of the photoelectrons emitted in the two cases are in the ratio 2:1, then the threshold frequency v0 of the metal is: