46295 + Interview Questions in Chemistry

1.	Pb+NaOH----->Pb+NaOH+H20------->Complete and balance the reactions with names of each compound
Answer» Pb+NaOH-----> Pb+NaOH+H20-------> Complete and balance the reactions with names of each compound

Discussion

2.	hybridisation of silicon in pyrosilicates
Answer» hybridisation of silicon in pyrosilicates

Discussion

3.	A metal has a fcc lattice . The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm-3. The molar mass of the metal is:(NA Avogadro's constant =6.02×1023 mol-1)
Answer» A metal has a fcc lattice . The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm^-3. The molar mass of the metal is: (N_A Avogadro's constant =6.02×10²³ mol^-1)

3.

A metal has a fcc lattice . The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm-3. The molar mass of the metal is:(NA Avogadro's constant =6.02×1023 mol-1)

Answer»

A metal has a fcc lattice . The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm^-3. The molar mass of the metal is:

(N_A Avogadro's constant =6.02×10²³ mol^-1)

Discussion

4.	According to Avogadro's law at the same temperature and pressure:
Answer» According to Avogadro's law at the same temperature and pressure:

Discussion

5.	1000g of 1molal aquous solution of sucrose is cooled and maintained at -3.5 degree C .Find how much ice will seperate out if Kf of water is =1.86
Answer» 1000g of 1molal aquous solution of sucrose is cooled and maintained at -3.5 degree C .Find how much ice will seperate out if Kf of water is =1.86

Discussion

6.	In a crystal lattice the cation has left a lattice site and is located at an interstitial position, the lattice defect is
Answer» In a crystal lattice the cation has left a lattice site and is located at an interstitial position, the lattice defect is

Discussion

7.	sodium and oxygen combines to form two compounds of which one isna2o .the percentage of sodium in other compound is 59%.find the formula of another
Answer» sodium and oxygen combines to form two compounds of which one isna2o .the percentage of sodium in other compound is 59%.find the formula of another

Discussion

8.	CFCl3 is responsible for the decomposition of ozone layer. Which of the following reacts with ozone to form oxygen?
Answer» $C F C l_{3}$ is responsible for the decomposition of ozone layer. Which of the following reacts with ozone to form oxygen?

Discussion

9.	Calculate the degree of ionization of 0.04 M HOCI solution having ionization constant 1.25 x 10^{-4}?(4) 0.05(3) 0.5(1) 0.025 (2) 0.25
Answer» Calculate the degree of ionization of 0.04 M HOCI solution having ionization constant 1.25 x 10^{-4}?(4) 0.05(3) 0.5(1) 0.025 (2) 0.25

Discussion

10.	11. What is Kernel in Atomic structure? How many Kernel electrons found in Argon and Iron?
Answer» 11. What is Kernel in Atomic structure? How many Kernel electrons found in Argon and Iron?

Discussion

11.	49. Reaction between sodium hydrogen carbonate and ethanoic acid
Answer» 49. Reaction between sodium hydrogen carbonate and ethanoic acid

Discussion

12.	56. Glucose is added to water such that the mole fraction of water in the solution becomes 0.8. Theboiling point of this solution is (Given Kb for water- 0.52 K kg/mol
Answer» 56. Glucose is added to water such that the mole fraction of water in the solution becomes 0.8. Theboiling point of this solution is (Given Kb for water- 0.52 K kg/mol

Discussion

13.	1. The higlest 2nd IE is for Oxygen, Flurione, Nitrogen. carbon?2. Why Neon has higher electron gain enthalpy than Argon and other noble gases?
Answer» 1. The higlest 2nd IE is for Oxygen, Flurione, Nitrogen. carbon? 2. Why Neon has higher electron gain enthalpy than Argon and other noble gases?

Discussion

14.	The kinetic energy of an electron emitted when a radiation of frequency 1.0×1015 s−1 hits the metal is 2×10−19 J. Calculate the threshold frequency of the metal.
Answer» The kinetic energy of an electron emitted when a radiation of frequency $1.0 \times 10^{15} s^{- 1}$ hits the metal is $2 \times 10^{- 19} J$ . Calculate the threshold frequency of the metal.

Discussion

15.	Possible product(s) of the given reaction is/are:
Answer» Possible product(s) of the given reaction is/are:

Discussion

16.	In a experiment, 4.90g of copper oxide was obtained from 3.92g of copper. In another experiment, 4.55g copper oxide gave on reduction 3.64g of copper. Show that these figures verify the law of constant proportion.
Answer» In a experiment, 4.90g of copper oxide was obtained from 3.92g of copper. In another experiment, 4.55g copper oxide gave on reduction 3.64g of copper. Show that these figures verify the law of constant proportion.

Discussion

17.	When aniline is treated with benzene diazonium chloride in acidic medium, the final product obtained is :
Answer» When aniline is treated with benzene diazonium chloride in acidic medium, the final product obtained is :

Discussion

18.	17. Which of the following species has maximum charge to mass ratio? 1. D^+ 2. H^+ 3. He^+ 4. He^{2+
Answer» 17. Which of the following species has maximum charge to mass ratio? 1. D^+ 2. H^+ 3. He^+ 4. He^{2+

Discussion

19.	A compound contains c=34.6percent ,H=3.85 percent, andO=61.55percent .Calculate the empirical formula
Answer» A compound contains c=34.6percent ,H=3.85 percent, andO=61.55percent .Calculate the empirical formula

Discussion

20.	The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequency.
Answer» The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequency.

Discussion

21.	Q. Which of the following gives RNC, when treated with CHCl_3 and alcoholic KOH? a\rbrack RNH_{2 } b\rbrack R_2NH c\rbrack R_3N d\rbrack R_4N^+Cl^{-
Answer» Q. Which of the following gives RNC, when treated with CHCl_3 and alcoholic KOH? a\rbrack RNH_{2 } b\rbrack R_2NH c\rbrack R_3N d\rbrack R_4N^+Cl^{-

Discussion

22.	ques : no. of non zero sulutions of 3[x]= 5{x} + x, are?
Answer» ques : no. of non zero sulutions of 3[x]= 5{x} + x, are?

Discussion

23.	Write the conditions for the solid (A+ B-) to show Schottky defect
Answer» Write the conditions for the solid (A+ B-) to show Schottky defect

Discussion

24.	36. Oxidation potential of 1)Ag 2)Au 3)Pt
Answer» 36. Oxidation potential of 1)Ag 2)Au 3)Pt

Discussion

25.	ntsulphuric acid used in a lead storage batteryis 38%by mass and has a density of 1.30g/cm3. calculate its molarity.n
Answer» ntsulphuric acid used in a lead storage batteryis 38%by mass and has a density of 1.30g/cm3. calculate its molarity.n

Discussion

26.	The value for Henry's constant for helium, hydrogen, nitrogen and oxygen at 293 K are 144.97 kbar, 69.16 kbar, 76.48 kbar and 34.86 kbar respectively. Which of the gas will be having maximum solubility?
Answer» The value for Henry's constant for helium, hydrogen, nitrogen and oxygen at 293 K are 144.97 kbar, 69.16 kbar, 76.48 kbar and 34.86 kbar respectively. Which of the gas will be having maximum solubility?

Discussion

27.	Tl+H2O+O2→A. A is
Answer» $T l + H_{2} O + O_{2} \to A$ . A is

Discussion

28.	First order X-ray reflection (λ = 154 pm) is maximum from a set of (2, 0, 0) planes of a B.C.C lattice was observed at 16∘, 6’. Then, the edge length of unit cell is
Answer» First order X-ray reflection ( $λ$ = 154 pm) is maximum from a set of (2, 0, 0) planes of a B.C.C lattice was observed at $16^{\circ}$ , 6’. Then, the edge length of unit cell is

Discussion

29.	The zeolites which are used as ion exchangers in softening of "hard" water are:
Answer» The zeolites which are used as ion exchangers in softening of "hard" water are:

Discussion

30.	40. The number of degenerate orbitals present in an energy level of a H-atom characterized by E = -R/16 where R is the Rydberg constant is: A. 16. B. 9. C. 4. D. 1
Answer» 40. The number of degenerate orbitals present in an energy level of a H-atom characterized by E = -R/16 where R is the Rydberg constant is: A. 16. B. 9. C. 4. D. 1

Discussion

31.	Which of the following reaction will evolve CO2(g) as product?
Answer» Which of the following reaction will evolve $C O_{2}$ (g) as product?

Discussion

32.	The structure of a binary solid substances like zinc blende. B ions from the lattice. A ions fulfill 25% of the tetrahedral holes determine the formula of the solid substance.
Answer» The structure of a binary solid substances like zinc blende. B ions from the lattice. A ions fulfill 25% of the tetrahedral holes determine the formula of the solid substance.

Discussion

33.	Which of the following are characteristics of thermosetting polymers? (a) Heavily branched cross linked polymers (b) Linear slightly branched long chain molecules (c) Become infusible on moulding so cannot be resused (d) Soften on heating and harden on cooling, can be reused
Answer» Which of the following are characteristics of thermosetting polymers? (a) Heavily branched cross linked polymers (b) Linear slightly branched long chain molecules (c) Become infusible on moulding so cannot be resused (d) Soften on heating and harden on cooling, can be reused

33.

Which of the following are characteristics of thermosetting polymers? (a) Heavily branched cross linked polymers (b) Linear slightly branched long chain molecules (c) Become infusible on moulding so cannot be resused (d) Soften on heating and harden on cooling, can be reused

Answer»

Which of the following are characteristics of thermosetting polymers?

(a) Heavily branched cross linked polymers

(b) Linear slightly branched long chain molecules

(c) Become infusible on moulding so cannot be resused

(d) Soften on heating and harden on cooling, can be reused

Discussion

34.	The dissociation constants of two acids HA1 and HA2 with equal concentrations are 3×10−4 and 1.8×10−5 respectively. The relative strength of the acids will be :
Answer» The dissociation constants of two acids $H A_{1}$ and $H A_{2}$ with equal concentrations are $3 \times 10^{- 4}$ and $1.8 \times 10^{- 5}$ respectively. The relative strength of the acids will be :

Discussion

35.	Find the maximum value of λ such that 18^λ divides 28!.
Answer» Find the maximum value of λ such that 18^λ divides 28!.

Discussion

36.	No. of possible products upon dehydration are (structural only)
Answer» No. of possible products upon dehydration are (structural only)

36.

No. of possible products upon dehydration are (structural only)

Answer»

No. of possible products upon dehydration are (structural only)

Discussion

37.	17. Relation between relative lowering of vapour pressure and molar mass.
Answer» 17. Relation between relative lowering of vapour pressure and molar mass.

Discussion

38.	Which of the following element is the most malleable metal?
Answer» Which of the following element is the most malleable metal?

Discussion

39.	11. A hydrocarbon (c5h8) on reductive ozolysis to give formaldehyde and 2-keto propanal .Assign the structure and name of the hydrocarbon .
Answer» 11. A hydrocarbon (c5h8) on reductive ozolysis to give formaldehyde and 2-keto propanal .Assign the structure and name of the hydrocarbon .

Discussion

40.	The metal that cannot be produced on reduction of its oxide by aluminium is
Answer» The metal that cannot be produced on reduction of its oxide by aluminium is

Discussion

41.	The number of geometrical isomers that can exist for square planar [Pt(Cl)(py)(NH3)(NH2OH)]+ is . (py = pyridine)
Answer» The number of geometrical isomers that can exist for square planar $[P t (C l) (p y) (N H_{3}) (N H_{2} O H)]^{+}$ is . (py = pyridine)

Discussion

42.	A compound contains 2 dissimilar asymmetric carbon atoms. The no. of optically active isomers is:-
Answer» A compound contains 2 dissimilar asymmetric carbon atoms. The no. of optically active isomers is:-

Discussion

43.	In the chemical reaction between stoichiometric quantities of KMnO4 and KI in weakly basic solution, what is the number of moles of I2 released for 4 mol of KMnO4 consumed?
Answer» In the chemical reaction between stoichiometric quantities of $K M n O_{4}$ and $K I$ in weakly basic solution, what is the number of moles of $I_{2}$ released for $4$ mol of $K M n O_{4}$ consumed?

Discussion

44.	36. Give the bond order and find the no. of electrons in ABO of CO and CO+ molecule with the help of molecular orbital energy diagram.
Answer» 36. Give the bond order and find the no. of electrons in ABO of CO and CO+ molecule with the help of molecular orbital energy diagram.

Discussion

45.	45. Acetoxime react's with P2O5 to give (1) Methyl cyanide (2) Methyl cyanate (3) Ethyl cyanide (4) Acetamide
Answer» 45. Acetoxime react's with P2O5 to give (1) Methyl cyanide (2) Methyl cyanate (3) Ethyl cyanide (4) Acetamide

Discussion

46.	Which one of the following is the correct order of increasing size?
Answer» Which one of the following is the correct order of increasing size?

Discussion

47.	metallic charged shell of radius R has a charge Q on its surface, the ratio of potential at A and B ie Va/Vb is? If point A lies on surface and point B at R/2 distance from surface.
Answer» metallic charged shell of radius R has a charge Q on its surface, the ratio of potential at A and B ie Va/Vb is? If point A lies on surface and point B at R/2 distance from surface.

Discussion

48.	Whichalkyl halide from the following pairs would you expect to react morerapidly by an SN2mechanism? Explain your answer.(i) (ii) (iii)
Answer» Which alkyl halide from the following pairs would you expect to react more rapidly by an S_N2 mechanism? Explain your answer. (i) (ii) (iii)

48.

Whichalkyl halide from the following pairs would you expect to react morerapidly by an SN2mechanism? Explain your answer.(i) (ii) (iii)

Answer»

Which
alkyl halide from the following pairs would you expect to react more
rapidly by an S_N2
mechanism? Explain your answer.

(i)

(ii)

(iii)

Discussion

49.	Which of the following oxide is the most acidic?
Answer» Which of the following oxide is the most acidic?

Discussion

50.	19. Why the e/m ratio of proton changes from each gas while the e/m ratio of the electron remains same and why the hydrogen atom doesn't have the neutron
Answer» 19. Why the e/m ratio of proton changes from each gas while the e/m ratio of the electron remains same and why the hydrogen atom doesn't have the neutron

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Pb+NaOH----->Pb+NaOH+H20------->Complete and balance the reactions with names of each compound

hybridisation of silicon in pyrosilicates

A metal has a fcc lattice . The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm-3. The molar mass of the metal is:(NA Avogadro's constant =6.02×1023 mol-1)

According to Avogadro's law at the same temperature and pressure:

1000g of 1molal aquous solution of sucrose is cooled and maintained at -3.5 degree C .Find how much ice will seperate out if Kf of water is =1.86

In a crystal lattice the cation has left a lattice site and is located at an interstitial position, the lattice defect is

sodium and oxygen combines to form two compounds of which one isna2o .the percentage of sodium in other compound is 59%.find the formula of another

CFCl3 is responsible for the decomposition of ozone layer. Which of the following reacts with ozone to form oxygen?

Calculate the degree of ionization of 0.04 M HOCI solution having ionization constant 1.25 x 10^{-4}?(4) 0.05(3) 0.5(1) 0.025 (2) 0.25

11. What is Kernel in Atomic structure? How many Kernel electrons found in Argon and Iron?

49. Reaction between sodium hydrogen carbonate and ethanoic acid

56. Glucose is added to water such that the mole fraction of water in the solution becomes 0.8. Theboiling point of this solution is (Given Kb for water- 0.52 K kg/mol

1. The higlest 2nd IE is for Oxygen, Flurione, Nitrogen. carbon?2. Why Neon has higher electron gain enthalpy than Argon and other noble gases?

The kinetic energy of an electron emitted when a radiation of frequency 1.0×1015 s−1 hits the metal is 2×10−19 J. Calculate the threshold frequency of the metal.

Possible product(s) of the given reaction is/are:

In a experiment, 4.90g of copper oxide was obtained from 3.92g of copper. In another experiment, 4.55g copper oxide gave on reduction 3.64g of copper. Show that these figures verify the law of constant proportion.

When aniline is treated with benzene diazonium chloride in acidic medium, the final product obtained is :

17. Which of the following species has maximum charge to mass ratio? 1. D^+ 2. H^+ 3. He^+ 4. He^{2+

A compound contains c=34.6percent ,H=3.85 percent, andO=61.55percent .Calculate the empirical formula

The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequency.

Q. Which of the following gives RNC, when treated with CHCl_3 and alcoholic KOH? a\rbrack RNH_{2 } b\rbrack R_2NH c\rbrack R_3N d\rbrack R_4N^+Cl^{-

ques : no. of non zero sulutions of 3[x]= 5{x} + x, are?

Write the conditions for the solid (A+ B-) to show Schottky defect

36. Oxidation potential of 1)Ag 2)Au 3)Pt

ntsulphuric acid used in a lead storage batteryis 38%by mass and has a density of 1.30g/cm3. calculate its molarity.n

The value for Henry's constant for helium, hydrogen, nitrogen and oxygen at 293 K are 144.97 kbar, 69.16 kbar, 76.48 kbar and 34.86 kbar respectively. Which of the gas will be having maximum solubility?

Tl+H2O+O2→A. A is

First order X-ray reflection (λ = 154 pm) is maximum from a set of (2, 0, 0) planes of a B.C.C lattice was observed at 16∘, 6’. Then, the edge length of unit cell is

The zeolites which are used as ion exchangers in softening of "hard" water are:

40. The number of degenerate orbitals present in an energy level of a H-atom characterized by E = -R/16 where R is the Rydberg constant is: A. 16. B. 9. C. 4. D. 1

Which of the following reaction will evolve CO2(g) as product?

The structure of a binary solid substances like zinc blende. B ions from the lattice. A ions fulfill 25% of the tetrahedral holes determine the formula of the solid substance.

Which of the following are characteristics of thermosetting polymers? (a) Heavily branched cross linked polymers (b) Linear slightly branched long chain molecules (c) Become infusible on moulding so cannot be resused (d) Soften on heating and harden on cooling, can be reused

The dissociation constants of two acids HA1 and HA2 with equal concentrations are 3×10−4 and 1.8×10−5 respectively. The relative strength of the acids will be :

Find the maximum value of λ such that 18^λ divides 28!.

No. of possible products upon dehydration are (structural only)

17. Relation between relative lowering of vapour pressure and molar mass.

Which of the following element is the most malleable metal?

11. A hydrocarbon (c5h8) on reductive ozolysis to give formaldehyde and 2-keto propanal .Assign the structure and name of the hydrocarbon .

The metal that cannot be produced on reduction of its oxide by aluminium is

The number of geometrical isomers that can exist for square planar [Pt(Cl)(py)(NH3)(NH2OH)]+ is . (py = pyridine)

A compound contains 2 dissimilar asymmetric carbon atoms. The no. of optically active isomers is:-

In the chemical reaction between stoichiometric quantities of KMnO4 and KI in weakly basic solution, what is the number of moles of I2 released for 4 mol of KMnO4 consumed?

36. Give the bond order and find the no. of electrons in ABO of CO and CO+ molecule with the help of molecular orbital energy diagram.

45. Acetoxime react's with P2O5 to give (1) Methyl cyanide (2) Methyl cyanate (3) Ethyl cyanide (4) Acetamide

Which one of the following is the correct order of increasing size?

metallic charged shell of radius R has a charge Q on its surface, the ratio of potential at A and B ie Va/Vb is? If point A lies on surface and point B at R/2 distance from surface.

Whichalkyl halide from the following pairs would you expect to react morerapidly by an SN2mechanism? Explain your answer.(i) (ii) (iii)

Which of the following oxide is the most acidic?

19. Why the e/m ratio of proton changes from each gas while the e/m ratio of the electron remains same and why the hydrogen atom doesn't have the neutron