46295 + Interview Questions in Chemistry

1.	Prove that HCN and HNC are Tautomers to eachother.
Answer» Prove that HCN and HNC are Tautomers to eachother.

Discussion

2.	57 What is meant by inert pair effect,noble gas kernel, oxidation state
Answer» 57 What is meant by inert pair effect,noble gas kernel, oxidation state

Discussion

3.	A sample of U238 (half-life =4.47×109 years) ore is found to contain 23.8 g of U238 and 20.6 g of Pb206. Calculate the age of the ore in billion years.
Answer» A sample of $U^{238}$ (half-life = $4.47 \times 10^{9}$ years) ore is found to contain 23.8 g of $U^{238}$ and 20.6 g of $P b^{206}$ . Calculate the age of the ore in billion years.

Discussion

4.	The double bond equivalence of the product formed in the above reaction is
Answer» The double bond equivalence of the product formed in the above reaction is

Discussion

5.	An ionic solid crystallizes as rock salt structure(NaCl) and the edge lenghth of FCC unit cell having rock salt structure is 508pm. If the radius of cation is 110pm , then what is the radius of anion?
Answer» An ionic solid crystallizes as rock salt structure(NaCl) and the edge lenghth of FCC unit cell having rock salt structure is 508pm. If the radius of cation is 110pm , then what is the radius of anion?

Discussion

6.	how many minutes will take to place out 5.0 gram of Cr from a Cr2(So4)3 solution using a current of 1.50 ampere
Answer» how many minutes will take to place out 5.0 gram of Cr from a Cr2(So4)3 solution using a current of 1.50 ampere

Discussion

7.	Formula of caro's acid is
Answer» Formula of caro's acid is

Discussion

8.	The maximum covalent character is seen in which of the following compounds?
Answer» The maximum covalent character is seen in which of the following compounds?

Discussion

9.	In the following scheme, product R is: CaC2H2O−−→PRed hot Fe tube−−−−−−−−−→873 KQCH3Cl−−−−−−−−→anhyd. AlCl3R
Answer» In the following scheme, product R is: $C a C_{2} H_{2} O - - \to P Red hot Fe tube - -------- \to 873 K Q C H_{3} C l - ------- \to anhyd. A l C l_{3} R$

Discussion

10.	In calcium phosphate mass percent of phosphorus is
Answer» In calcium phosphate mass percent of phosphorus is

Discussion

11.	18. 1nitro 2bromo 3 floro benzene +NaSCH3 Will give ?
Answer» 18. 1nitro 2bromo 3 floro benzene +NaSCH3 Will give ?

Discussion

12.	What is the function of stalk in f0f1 particles?
Answer» What is the function of stalk in f0f1 particles?

Discussion

13.	Which compound would give 5-keto-2-methyl hexanal upon ozonolysis?
Answer» Which compound would give 5-keto-2-methyl hexanal upon ozonolysis?

Discussion

14.	1.Equivalent weight of crystalline oxalic acid is 2.what is the ratio of empirical formula mass to molecular formula mass of benzene 3.Haemoglobin contain 0.334%of iron by weight. The molecular weight of haemoglobin is approximately 67200.The number of iron atoms( at.weight Fe 56) present in one molecule of haemoglobin is
Answer» 1.Equivalent weight of crystalline oxalic acid is 2.what is the ratio of empirical formula mass to molecular formula mass of benzene 3.Haemoglobin contain 0.334%of iron by weight. The molecular weight of haemoglobin is approximately 67200.The number of iron atoms( at.weight Fe 56) present in one molecule of haemoglobin is

Discussion

15.	How many of the following will undergo Reimer-Tiemann reaction? Indole, Phenol, Pyrrole, Furan, Catechol, .
Answer» How many of the following will undergo Reimer-Tiemann reaction? Indole, Phenol, Pyrrole, Furan, Catechol, .

Discussion

16.	In the atomic volume vs atomic weight of the elements graph, which of the following element occupies the peak position on the curve?
Answer» In the atomic volume vs atomic weight of the elements graph, which of the following element occupies the peak position on the curve?

Discussion

17.	8. For the homogeneous elementary reaction , A+B-----> C the unit of rate constant is
Answer» 8. For the homogeneous elementary reaction , A+B-----> C the unit of rate constant is

Discussion

18.	Question 9The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?(a) 13(b) 10(c) 14(d) 16
Answer» Question 9 The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion? (a) 13 (b) 10 (c) 14 (d) 16

Discussion

19.	A gas allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy ΔU of the gas in joules will be
Answer» A gas allowed to expand in a well insulated container against a constant external pressure of $2.5 a t m$ from an initial volume of $2.50 L$ to a final volume of $4.50 L$ . The change in internal energy $Δ U$ of the gas in joules will be

Discussion

20.	Suppose you are given a chance to repeat the alpha-particle scattering experiment using a thin sheet of solid hydrogen in place of the gold foil. (Hydrogen is a solid at temperatures below 14 K.) What results do you expect?
Answer» Suppose you are given a chance to repeat the alpha-particle scattering experiment using a thin sheet of solid hydrogen in place of the gold foil. (Hydrogen is a solid at temperatures below 14 K.) What results do you expect?

Discussion

21.	Alkynes react with hydrogen halides to form:
Answer» Alkynes react with hydrogen halides to form:

Discussion

22.	Will alkenes show addition reaction according to Anti-Markownikov rule in presence of -(i) Hydrogen Peroxide(ii) Hydrogen Peroxide with sunlight( h neu) ?
Answer» Will alkenes show addition reaction according to Anti-Markownikov rule in presence of - (i) Hydrogen Peroxide (ii) Hydrogen Peroxide with sunlight( h neu) ?

Discussion

23.	0.3 g of an acid is neutralised by 40 cm3 of 0.125 N NaOH. Equivalent mass of the acid is
Answer» 0.3 g of an acid is neutralised by 40 cm3 of 0.125 N NaOH. Equivalent mass of the acid is

Discussion

24.	Valency of the metal atom with respect to oxygen is maximum in
Answer» Valency of the metal atom with respect to oxygen is maximum in

Discussion

25.	21. Calculate the PH of a solution which contain 9.9 ml 1 M HCL and 100ml of 0.1 M NaOH
Answer» 21. Calculate the PH of a solution which contain 9.9 ml 1 M HCL and 100ml of 0.1 M NaOH

Discussion

26.	4.6 × 1022 atoms of an element weighs 13.8 g. The atomic mass of the element is
Answer» $4.6 \times 10^{22}$ atoms of an element weighs $13.8 g$ . The atomic mass of the element is

Discussion

27.	For a given value of n (principal quantum number), ionization enthalpy is highest for
Answer» For a given value of n (principal quantum number), ionization enthalpy is highest for

Discussion

28.	How many seconds are there in one day?
Answer» How many seconds are there in one day?

Discussion

29.	How to use wavy curve method to solve inequations?
Answer» How to use wavy curve method to solve inequations?

Discussion

30.	The correct sequence of decreasing number of π-bonds in the structures of H2SO3,H2SO4 and H2S2O7 is:
Answer» The correct sequence of decreasing number of $π$ -bonds in the structures of $H_{2} S O_{3}, H_{2} S O_{4} a n d H_{2} S_{2} O_{7}$ is:

Discussion

31.	What will be the work done when 1mole of a gas expands isothermally from 15l to 50 l against a constant pressure of 1 atm at 25⁰C.What is the work done when 1 mole of a gas expands isothermally from 25l to 250l at a constant pressure of 1 atm and q temperature of 300K.
Answer» What will be the work done when 1mole of a gas expands isothermally from 15l to 50 l against a constant pressure of 1 atm at 25⁰C. What is the work done when 1 mole of a gas expands isothermally from 25l to 250l at a constant pressure of 1 atm and q temperature of 300K.

Discussion

32.	Which of the following compound is produced when CH2=CH−(CH2)2COOH reacts with HBr in presence of peroxides
Answer» Which of the following compound is produced when $C H_{2} = C H - (C H_{2})_{2} C O O H$ reacts with HBr in presence of peroxides

Discussion

33.	if [a] = [b] = [a+b] is true then angle between a and b will be ?
Answer» if [a] = [b] = [a+b] is true then angle between a and b will be ?

Discussion

34.	Benzene and chloroform are mixed together. Mole fraction of benzene is 0.45.calculate %by mass of benzene.
Answer» Benzene and chloroform are mixed together. Mole fraction of benzene is 0.45.calculate %by mass of benzene.

Discussion

35.	The existence of two different coloured complexes with the composition of [Co(NH3)4Cl2]+ is due to 1) linkage isomerism 2) geometrical isomerism 3) co-ordinate isomerism 4) ionisation isomerism
Answer» The existence of two different coloured complexes with the composition of [Co(NH3)4Cl2]+ is due to 1) linkage isomerism 2) geometrical isomerism 3) co-ordinate isomerism 4) ionisation isomerism

Discussion

36.	What is depression of freezing point?
Answer» What is depression of freezing point?

Discussion

37.	What is van der waal's radii ?
Answer» What is van der waal's radii ?

Discussion

38.	79 Which of the following nitrogen hallide behave as weakest base ? 1)NF3 2)NCl3 3)NBr3 4)NI3
Answer» 79 Which of the following nitrogen hallide behave as weakest base ? 1)NF3 2)NCl3 3)NBr3 4)NI3

Discussion

39.	if x is electronegativity of S1 and y is electronegativity of S2 then which of the following is true
Answer» if x is electronegativity of $S_{1}$ and y is electronegativity of $S_{2}$ then which of the following is true

39.

if x is electronegativity of S1 and y is electronegativity of S2 then which of the following is true

Answer»

if x is electronegativity of $S_{1}$ and y is electronegativity of $S_{2}$ then which of the following is true

Discussion

40.	Consider the composite system shown in the figure which is held at 300 K. 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−1mol−1k−1 )
Answer» Consider the composite system shown in the figure which is held at 300 K. 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 $L^{- 1} m o l^{- 1} k^{- 1}$ )

40.

Consider the composite system shown in the figure which is held at 300 K. 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−1mol−1k−1 )

Answer»

Consider the composite system shown in the figure which is held at 300 K. 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 $L^{- 1} m o l^{- 1} k^{- 1}$ )

Discussion

41.	What is basicity of H3PO4?
Answer» What is basicity of H₃PO₄?

Discussion

42.	ntA solution containing 13.5g use a per 500 ml of solution in water has same osmotic pressure as a solution of sucrose ( C12H22O11 ) in water . Calculate the mass of sucrose present in 500 ml of its solution .n
Answer» ntA solution containing 13.5g use a per 500 ml of solution in water has same osmotic pressure as a solution of sucrose ( C12H22O11 ) in water . Calculate the mass of sucrose present in 500 ml of its solution .n

Discussion

43.	80.What is the definition of polymorphism and isomorphism?
Answer» 80.What is the definition of polymorphism and isomorphism?

Discussion

44.	why Pbo_2 dissociayes into PbO+O_2 why not Pb+O2 while HgO→ Hg+O_{2
Answer» why Pbo_2 dissociayes into PbO+O_2 why not Pb+O2 while HgO→ Hg+O_{2

Discussion

45.	prove that value of R is 8.314
Answer» prove that value of R is 8.314

Discussion

46.	Consider the following partially labelled figure for an ideal binary solution of benzene and toluene and answer the following questions:The composition of the liquid for which the vapour contains equal number of benzene and toluene molecules is about:
Answer» Consider the following partially labelled figure for an ideal binary solution of benzene and toluene and answer the following questions: The composition of the liquid for which the vapour contains equal number of benzene and toluene molecules is about:

Discussion

47.	HOW DOES THE POTENTIAL DIFFERENCE OCCURS BY BATTERY CONSTITING ONE OR MORE CELLS
Answer» HOW DOES THE POTENTIAL DIFFERENCE OCCURS BY BATTERY CONSTITING ONE OR MORE CELLS

Discussion

48.	what is the capacity (in litre) for 1 mole of nitrogen atoms and one mole of nitrogen molecules ?
Answer» what is the capacity (in litre) for 1 mole of nitrogen atoms and one mole of nitrogen molecules ?

Discussion

49.	Hydrolysis of sucrose is given by the following reaction. Sucrose+H2O⇌Glucose+FructoseIf the equilibrium constant (Kc) is 2×1013 at 300 K, the value of ΔrG0 at the same temperature will be :
Answer» Hydrolysis of sucrose is given by the following reaction. $Sucrose + H_{2} O ⇌ Glucose+Fructose$ If the equilibrium constant $(K_{c})$ is $2 \times 10^{13}$ at $300 K$ , the value of $Δ_{r} G^{0}$ at the same temperature will be :

Discussion

50.	what is the difference between primary focus,secondary focus and first focus,second focus
Answer» what is the difference between primary focus,secondary focus and first focus,second focus

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Prove that HCN and HNC are Tautomers to eachother.

57 What is meant by inert pair effect,noble gas kernel, oxidation state

A sample of U238 (half-life =4.47×109 years) ore is found to contain 23.8 g of U238 and 20.6 g of Pb206. Calculate the age of the ore in billion years.

The double bond equivalence of the product formed in the above reaction is

An ionic solid crystallizes as rock salt structure(NaCl) and the edge lenghth of FCC unit cell having rock salt structure is 508pm. If the radius of cation is 110pm , then what is the radius of anion?

how many minutes will take to place out 5.0 gram of Cr from a Cr2(So4)3 solution using a current of 1.50 ampere

Formula of caro's acid is

The maximum covalent character is seen in which of the following compounds?

In the following scheme, product R is: CaC2H2O−−→PRed hot Fe tube−−−−−−−−−→873 KQCH3Cl−−−−−−−−→anhyd. AlCl3R

In calcium phosphate mass percent of phosphorus is

18. 1nitro 2bromo 3 floro benzene +NaSCH3 Will give ?

What is the function of stalk in f0f1 particles?

Which compound would give 5-keto-2-methyl hexanal upon ozonolysis?

How many of the following will undergo Reimer-Tiemann reaction? Indole, Phenol, Pyrrole, Furan, Catechol, .

In the atomic volume vs atomic weight of the elements graph, which of the following element occupies the peak position on the curve?

8. For the homogeneous elementary reaction , A+B-----> C the unit of rate constant is

Question 9The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?(a) 13(b) 10(c) 14(d) 16

A gas allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy ΔU of the gas in joules will be

Suppose you are given a chance to repeat the alpha-particle scattering experiment using a thin sheet of solid hydrogen in place of the gold foil. (Hydrogen is a solid at temperatures below 14 K.) What results do you expect?

Alkynes react with hydrogen halides to form:

Will alkenes show addition reaction according to Anti-Markownikov rule in presence of -(i) Hydrogen Peroxide(ii) Hydrogen Peroxide with sunlight( h neu) ?

0.3 g of an acid is neutralised by 40 cm3 of 0.125 N NaOH. Equivalent mass of the acid is

Valency of the metal atom with respect to oxygen is maximum in

21. Calculate the PH of a solution which contain 9.9 ml 1 M HCL and 100ml of 0.1 M NaOH

4.6 × 1022 atoms of an element weighs 13.8 g. The atomic mass of the element is

For a given value of n (principal quantum number), ionization enthalpy is highest for

How many seconds are there in one day?

How to use wavy curve method to solve inequations?

The correct sequence of decreasing number of π-bonds in the structures of H2SO3,H2SO4 and H2S2O7 is:

What will be the work done when 1mole of a gas expands isothermally from 15l to 50 l against a constant pressure of 1 atm at 25⁰C.What is the work done when 1 mole of a gas expands isothermally from 25l to 250l at a constant pressure of 1 atm and q temperature of 300K.

Which of the following compound is produced when CH2=CH−(CH2)2COOH reacts with HBr in presence of peroxides

if [a] = [b] = [a+b] is true then angle between a and b will be ?

Benzene and chloroform are mixed together. Mole fraction of benzene is 0.45.calculate %by mass of benzene.

The existence of two different coloured complexes with the composition of [Co(NH3)4Cl2]+ is due to 1) linkage isomerism 2) geometrical isomerism 3) co-ordinate isomerism 4) ionisation isomerism

What is depression of freezing point?

What is van der waal's radii ?

79 Which of the following nitrogen hallide behave as weakest base ? 1)NF3 2)NCl3 3)NBr3 4)NI3

if x is electronegativity of S1 and y is electronegativity of S2 then which of the following is true

Consider the composite system shown in the figure which is held at 300 K. 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−1mol−1k−1 ­­)

What is basicity of H3PO4?

ntA solution containing 13.5g use a per 500 ml of solution in water has same osmotic pressure as a solution of sucrose ( C12H22O11 ) in water . Calculate the mass of sucrose present in 500 ml of its solution .n

80.What is the definition of polymorphism and isomorphism?

why Pbo_2 dissociayes into PbO+O_2 why not Pb+O2 while HgO→ Hg+O_{2

prove that value of R is 8.314

Consider the following partially labelled figure for an ideal binary solution of benzene and toluene and answer the following questions:The composition of the liquid for which the vapour contains equal number of benzene and toluene molecules is about:

HOW DOES THE POTENTIAL DIFFERENCE OCCURS BY BATTERY CONSTITING ONE OR MORE CELLS

what is the capacity (in litre) for 1 mole of nitrogen atoms and one mole of nitrogen molecules ?

Hydrolysis of sucrose is given by the following reaction. Sucrose+H2O⇌Glucose+FructoseIf the equilibrium constant (Kc) is 2×1013 at 300 K, the value of ΔrG0 at the same temperature will be :

what is the difference between primary focus,secondary focus and first focus,second focus

Consider the composite system shown in the figure which is held at 300 K. 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−1mol−1k−1 )