46295 + Interview Questions in Chemistry

1.	Cu+HNO3 -> Cu(NO3)2 +NO2+ H2OBalance the given rection using ion electron method.
Answer» Cu+HNO3 -> Cu(NO3)2 +NO2+ H2O Balance the given rection using ion electron method.

Discussion

2.	14.The half life of 32P is 14.2 days. How long would it take a solution containing 42000 d.p.m. to decay to 500d.p.m.?
Answer» 14.The half life of 32P is 14.2 days. How long would it take a solution containing 42000 d.p.m. to decay to 500d.p.m.?

Discussion

3.	31. How many optical isomers are possible for 2,3 Dihydroxybutanedial
Answer» 31. How many optical isomers are possible for 2,3 Dihydroxybutanedial

Discussion

4.	56 g of nitrogen and 20 g of hydrogen reacts in a closed vessel to form ammonia. Maximum amount of ammonia produced inthis reaction is
Answer» 56 g of nitrogen and 20 g of hydrogen reacts in a closed vessel to form ammonia. Maximum amount of ammonia produced in this reaction is

Discussion

5.	Mention any three properties of phenol.
Answer» Mention any three properties of phenol.

Discussion

6.	Midrib run parallel and diverge towards the margin of lamina in
Answer» Midrib run parallel and diverge towards the margin of lamina in

Discussion

7.	A Cubic is made up of two elements P and Q. Atoms of P are present at the corners of the cube and atoms of Q are present at the body Centre. What is the formula of the compound and what are the coordination numbers of P and Q?Explain in detail how the coordination number is coming 8,8.
Answer» A Cubic is made up of two elements P and Q. Atoms of P are present at the corners of the cube and atoms of Q are present at the body Centre. What is the formula of the compound and what are the coordination numbers of P and Q? Explain in detail how the coordination number is coming 8,8.

Discussion

8.	Why is arsenic suicide a negative sol? What role does preferential absorption play here? Why does sulphur ion prefer to adsorb barium ions? Why does silver ions not adsorb chloride ions?
Answer» Why is arsenic suicide a negative sol? What role does preferential absorption play here? Why does sulphur ion prefer to adsorb barium ions? Why does silver ions not adsorb chloride ions?

Discussion

9.	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

10.	Soft drink bottles and baby feeding bottles are generally made up of
Answer» Soft drink bottles and baby feeding bottles are generally made up of

Discussion

11.	Why this reaction go almost to completion ? A+BC , K=10^{
Answer» Why this reaction go almost to completion ? A+BC , K=10^{

Discussion

12.	What is the mass of the precipitate formed when 50 ml of 16.9% weight by volume solution of AgNO3 is mixed with 50 ml of 5.8% weight by volume NaCl solution?
Answer» What is the mass of the precipitate formed when 50 ml of 16.9% weight by volume solution of AgNO3 is mixed with 50 ml of 5.8% weight by volume NaCl solution?

Discussion

13.	The molarity of orthophosphoric acid having purity of 70% by mass and specific gravity 1.54 would be
Answer» The molarity of orthophosphoric acid having purity of 70% by mass and specific gravity 1.54 would be

Discussion

14.	X––Mn7+2+Y––O2−7→Z––Mn4++A––O2X,Y,Z and A are stoichiometric coefficients.Here, X,Y,Z and A are respectively
Answer» $X - - M n_{2}^{7 +} + Y - - O_{7}^{2 -} \to Z - - M n^{4 +} + A - - O_{2}$ X,Y,Z and A are stoichiometric coefficients. Here, X,Y,Z and A are respectively

Discussion

15.	15. Is the enthalpy of formation (not standard) of pure elements also zero??
Answer» 15. Is the enthalpy of formation (not standard) of pure elements also zero??

Discussion

16.	hudeogen has three isotopes how many diatomic molecule are possible from i
Answer» hudeogen has three isotopes how many diatomic molecule are possible from i

Discussion

17.	What are the two parts of a soap molecule, and how are they different?
Answer» What are the two parts of a soap molecule, and how are they different?

Discussion

18.	On a certain humid day, the mole fraction of the water vapour in air at 25∘C is 0.0287. If total pressure of air is 0.977 bar, calculate the partial pressure of water vapour in air and relative humidity if the vapour pressure of water at 25∘C is 0.0313 bar. The partial pressure of water vapour (PH2O) and relative humidity (RH) respectively are:
Answer» On a certain humid day, the mole fraction of the water vapour in air at $25^{\circ} C$ is 0.0287. If total pressure of air is 0.977 bar, calculate the partial pressure of water vapour in air and relative humidity if the vapour pressure of water at $25^{\circ} C$ is 0.0313 bar. The partial pressure of water vapour ( $P_{H_{2} O}$ ) and relative humidity ( $R_{H}$ ) respectively are:

Discussion

19.	A flask contains ch4 and SO2 in equal weights ratio.The ratio of number of atoms of ch4 to that of SO2 in the flask is______
Answer» A flask contains ch4 and SO2 in equal weights ratio.The ratio of number of atoms of ch4 to that of SO2 in the flask is______

Discussion

20.	10 dm3 of N2 gas and 10 dm3 of a gas X at the same temperature contain the same number of molecules and have the same mass. The gas X is:
Answer» $10 {dm}^{3}$ of $N_{2}$ gas and $10 {dm}^{3}$ of a gas $X$ at the same temperature contain the same number of molecules and have the same mass. The gas $X$ is:

Discussion

21.	What is the minimum mass of CaCO3(s) below which it decomposes completely, required to establish equilibrium in a 6.50 lit container.
Answer» What is the minimum mass of CaCO₃(s) below which it decomposes completely, required to establish equilibrium in a 6.50 lit container.

Discussion

22.	How do you count forthe following observations?(a) Though alkaline potassium permanganate and acidic potassiumpermanganate both are used as oxidants, yet in the manufacture ofbenzoic acid from toluene we use alcoholic potassium permanganate asan oxidant. Why? Write a balanced redox equation for the reaction.(b) When concentrated sulphuric acid is added to an inorganicmixture containing chloride, we get colourless pungent smelling gasHCl, but if the mixture contains bromide then we get red vapour ofbromine. Why?
Answer» How do you count for the following observations? (a) Though alkaline potassium permanganate and acidic potassium permanganate both are used as oxidants, yet in the manufacture of benzoic acid from toluene we use alcoholic potassium permanganate as an oxidant. Why? Write a balanced redox equation for the reaction. (b) When concentrated sulphuric acid is added to an inorganic mixture containing chloride, we get colourless pungent smelling gas HCl, but if the mixture contains bromide then we get red vapour of bromine. Why?

22.

How do you count forthe following observations?(a) Though alkaline potassium permanganate and acidic potassiumpermanganate both are used as oxidants, yet in the manufacture ofbenzoic acid from toluene we use alcoholic potassium permanganate asan oxidant. Why? Write a balanced redox equation for the reaction.(b) When concentrated sulphuric acid is added to an inorganicmixture containing chloride, we get colourless pungent smelling gasHCl, but if the mixture contains bromide then we get red vapour ofbromine. Why?

Answer»

How do you count for
the following observations?

(a) Though alkaline potassium permanganate and acidic potassium
permanganate both are used as oxidants, yet in the manufacture of
benzoic acid from toluene we use alcoholic potassium permanganate as
an oxidant. Why? Write a balanced redox equation for the reaction.

(b) When concentrated sulphuric acid is added to an inorganic
mixture containing chloride, we get colourless pungent smelling gas
HCl, but if the mixture contains bromide then we get red vapour of
bromine. Why?

Discussion

23.	What is virtual image
Answer» What is virtual image

Discussion

24.	Explain periodic function derive it's expression
Answer» Explain periodic function derive it's expression

Discussion

25.	In 180gm of water , what amount of glucose must be added to reduce its vapour pressure by 20%?
Answer» In 180gm of water , what amount of glucose must be added to reduce its vapour pressure by 20%?

Discussion

26.	How do you explain the presence of an aldehydic group in a glucose molecule?
Answer» How do you explain the presence of an aldehydic group in a glucose molecule?

Discussion

27.	what is ph of 10^{-9} M aqueous solution of HCl
Answer» what is ph of 10^{-9} M aqueous solution of HCl

Discussion

28.	The metal with high melting point in 4d series is
Answer» The metal with high melting point in 4d series is

Discussion

29.	From the following ions, which has the highest value of ionic radius?
Answer» From the following ions, which has the highest value of ionic radius?

Discussion

30.	ntvapour pressureof pure benzene and tolueneis 160 and60 torr.mole fractiion of tolune in vapour phasein contact with equimolar solutionof benzene and tolune is?n
Answer» ntvapour pressureof pure benzene and tolueneis 160 and60 torr.mole fractiion of tolune in vapour phasein contact with equimolar solutionof benzene and tolune is?n

Discussion

31.	How will you bring about the following conversion in not more than two steps? Propanone to propene Benzoic acid to benzaldehyde Ethanol to 3-hydroxy butanal Benzene to m-ntroacetophenone Benzaldehyde to benzophenone Bromobenzene to l-phenylethanol Benzaldehyde to 3-phenyl propan-1-ol Benzaldehyde to α-hydroxy phenyl acetic acid Benzoic acid to m-nitrobenzyl alcohol
Answer» How will you bring about the following conversion in not more than two steps? Propanone to propene Benzoic acid to benzaldehyde Ethanol to 3-hydroxy butanal Benzene to m-ntroacetophenone Benzaldehyde to benzophenone Bromobenzene to l-phenylethanol Benzaldehyde to 3-phenyl propan-1-ol Benzaldehyde to $α$ -hydroxy phenyl acetic acid Benzoic acid to m-nitrobenzyl alcohol

31.

How will you bring about the following conversion in not more than two steps? Propanone to propene Benzoic acid to benzaldehyde Ethanol to 3-hydroxy butanal Benzene to m-ntroacetophenone Benzaldehyde to benzophenone Bromobenzene to l-phenylethanol Benzaldehyde to 3-phenyl propan-1-ol Benzaldehyde to α-hydroxy phenyl acetic acid Benzoic acid to m-nitrobenzyl alcohol

Answer»

How will you bring about the following conversion in not more than two steps?
Propanone to propene

Benzoic acid to benzaldehyde

Ethanol to 3-hydroxy butanal

Benzene to m-ntroacetophenone

Benzaldehyde to benzophenone

Bromobenzene to l-phenylethanol

Benzaldehyde to 3-phenyl propan-1-ol

Benzaldehyde to $α$ -hydroxy phenyl acetic acid

Benzoic acid to m-nitrobenzyl alcohol

Discussion

32.	State as to why(a) a solution of Na2CO3is alkaline ?(b) alkali metals are prepared by electrolysis of their fusedchlorides ?(c) sodium is found to be more useful than potassium ?
Answer» State as to why (a) a solution of Na₂CO₃ is alkaline ? (b) alkali metals are prepared by electrolysis of their fused chlorides ? (c) sodium is found to be more useful than potassium ?

32.

State as to why(a) a solution of Na2CO3is alkaline ?(b) alkali metals are prepared by electrolysis of their fusedchlorides ?(c) sodium is found to be more useful than potassium ?

Answer»

State as to why

(a) a solution of Na₂CO₃
is alkaline ?

(b) alkali metals are prepared by electrolysis of their fused
chlorides ?

(c) sodium is found to be more useful than potassium ?

Discussion

33.	100 mL of 1.0 M solution of a monobasic acid (pKa=5) is titrated against Ca(OH)2 solution. At equivalence point the pH of solution is ?
Answer» 100 mL of 1.0 M solution of a monobasic acid $(p K_{a} = 5)$ is titrated against $C a (O H)_{2}$ solution. At equivalence point the pH of solution is ?

Discussion

34.	In which of the following reaction,phenol or sodium phenoxide is not formed. (a)C6H5N2Cl+alcoholic KOH→ (b)C6H5OCl+NaOH→ (c)C6H5N2Cl+aqueous NaOH→ (d)C6H5N2Cl+H2O
Answer» In which of the following reaction,phenol or sodium phenoxide is not formed. (a)C6H5N2Cl+alcoholic KOH→ (b)C6H5OCl+NaOH→ (c)C6H5N2Cl+aqueous NaOH→ (d)C6H5N2Cl+H2O

Discussion

35.	Consider the figure given for solid XY. Answer the following questions: The number of XY units per unit cell is:
Answer» Consider the figure given for solid XY. Answer the following questions: The number of XY units per unit cell is:

35.

Consider the figure given for solid XY. Answer the following questions: The number of XY units per unit cell is:

Answer»

Consider the figure given for solid XY. Answer the following questions:

The number of XY units per unit cell is:

Discussion

36.	What is the graph of {1[A]} vs time for second order reaction looks like?
Answer» What is the graph of ${\frac{1}{[A]}}$ vs time for second order reaction looks like?

Discussion

37.	80mL 0.1M H2SO4 was mixed with 50 mL of 0.1 M NaOH find if final solution is acidic or basic , then find concentration of H+ or OH- ions
Answer» 80mL 0.1M H2SO4 was mixed with 50 mL of 0.1 M NaOH find if final solution is acidic or basic , then find concentration of H+ or OH- ions

Discussion

38.	00833 mol of carbohydrateof empincall forrmula CHO contan 1g of hydrogen. The malecular formula ofcaohydrate is4 CH,O
Answer» 00833 mol of carbohydrateof empincall forrmula CHO contan 1g of hydrogen. The malecular formula ofcaohydrate is4 CH,O

Discussion

39.	The wavelength of the photon emitted, when an electron jumps from fourth orbit to second orbit in hydrogen, is 20.397 cm. Wavelength of the photon emitted for the same transition in He+, is,
Answer» The wavelength of the photon emitted, when an electron jumps from fourth orbit to second orbit in hydrogen, is $20.397 cm .$ Wavelength of the photon emitted for the same transition in $H e^{+}$ , is,

Discussion

40.	12. Which of the following Alkanes can be easily sulphonated? (a) n-Butane (b) Isobutane (c) n-Pentane (d) n-Hexane
Answer» 12. Which of the following Alkanes can be easily sulphonated? (a) n-Butane (b) Isobutane (c) n-Pentane (d) n-Hexane

Discussion

41.	Dow's process the appropriate pressure is 320 atm or 300 atm ?
Answer» Dow's process the appropriate pressure is 320 atm or 300 atm ?

Discussion

42.	Is it important to always use 6.022 * 10^23 while solving numericals of mole concept or using NA (N subscript A) would be suffice ?
Answer» Is it important to always use 6.022 * 10^23 while solving numericals of mole concept or using NA (N subscript A) would be suffice ?

Discussion

43.	Which of the following catalyst is used in the polymerisation of CH≡CH to C6H6
Answer» Which of the following catalyst is used in the polymerisation of $C H \equiv C H$ to $C_{6} H_{6}$

Discussion

44.	What is the equation of carbon dioxide and hydrogen peroxide?
Answer» What is the equation of carbon dioxide and hydrogen peroxide?

Discussion

45.	9. Why sodium form peroxide
Answer» 9. Why sodium form peroxide

Discussion

46.	Antiseptics and disinfectants either skill or prevent the growth of microorganisms. Identify which of the following statements is not true.
Answer» Antiseptics and disinfectants either skill or prevent the growth of microorganisms. Identify which of the following statements is not true.

Discussion

47.	When 0.15 mol of Ammonia is dissolved in water to make 1 L of solution, the [OH]− of solution is 1.34×10−3M. Calculate Kb for NH3.
Answer» When $0.15 m o l$ of Ammonia is dissolved in water to make $1 L$ of solution, the $[O H]^{-}$ of solution is $1.34 \times 10^{- 3} M$ . Calculate $K_{b}$ for $N H_{3}$ .

Discussion

48.	Among the following, the poorest electrolytic conductor would be
Answer» Among the following, the poorest electrolytic conductor would be

Discussion

49.	No. Of possible secondary alcohols in C5H12O
Answer» No. Of possible secondary alcohols in C5H12O

Discussion

50.	what is value of integration of 1/x^2
Answer» what is value of integration of 1/x^2

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Cu+HNO3 -> Cu(NO3)2 +NO2+ H2OBalance the given rection using ion electron method.

14.The half life of 32P is 14.2 days. How long would it take a solution containing 42000 d.p.m. to decay to 500d.p.m.?

31. How many optical isomers are possible for 2,3 Dihydroxybutanedial

56 g of nitrogen and 20 g of hydrogen reacts in a closed vessel to form ammonia. Maximum amount of ammonia produced inthis reaction is

Mention any three properties of phenol.

Midrib run parallel and diverge towards the margin of lamina in

A Cubic is made up of two elements P and Q. Atoms of P are present at the corners of the cube and atoms of Q are present at the body Centre. What is the formula of the compound and what are the coordination numbers of P and Q?Explain in detail how the coordination number is coming 8,8.

Why is arsenic suicide a negative sol? What role does preferential absorption play here? Why does sulphur ion prefer to adsorb barium ions? Why does silver ions not adsorb chloride ions?

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

Soft drink bottles and baby feeding bottles are generally made up of

Why this reaction go almost to completion ? A+BC , K=10^{

What is the mass of the precipitate formed when 50 ml of 16.9% weight by volume solution of AgNO3 is mixed with 50 ml of 5.8% weight by volume NaCl solution?

The molarity of orthophosphoric acid having purity of 70% by mass and specific gravity 1.54 would be

X––Mn7+2+Y––O2−7→Z––Mn4++A––O2X,Y,Z and A are stoichiometric coefficients.Here, X,Y,Z and A are respectively

15. Is the enthalpy of formation (not standard) of pure elements also zero??

hudeogen has three isotopes how many diatomic molecule are possible from i

What are the two parts of a soap molecule, and how are they different?

A flask contains ch4 and SO2 in equal weights ratio.The ratio of number of atoms of ch4 to that of SO2 in the flask is______

10 dm3 of N2 gas and 10 dm3 of a gas X at the same temperature contain the same number of molecules and have the same mass. The gas X is:

What is the minimum mass of CaCO3(s) below which it decomposes completely, required to establish equilibrium in a 6.50 lit container.

What is virtual image

Explain periodic function derive it's expression

In 180gm of water , what amount of glucose must be added to reduce its vapour pressure by 20%?

How do you explain the presence of an aldehydic group in a glucose molecule?

what is ph of 10^{-9} M aqueous solution of HCl

The metal with high melting point in 4d series is

From the following ions, which has the highest value of ionic radius?

ntvapour pressureof pure benzene and tolueneis 160 and60 torr.mole fractiion of tolune in vapour phasein contact with equimolar solutionof benzene and tolune is?n

State as to why(a) a solution of Na2CO3is alkaline ?(b) alkali metals are prepared by electrolysis of their fusedchlorides ?(c) sodium is found to be more useful than potassium ?

100 mL of 1.0 M solution of a monobasic acid (pKa=5) is titrated against Ca(OH)2 solution. At equivalence point the pH of solution is ?

In which of the following reaction,phenol or sodium phenoxide is not formed. (a)C6H5N2Cl+alcoholic KOH→ (b)C6H5OCl+NaOH→ (c)C6H5N2Cl+aqueous NaOH→ (d)C6H5N2Cl+H2O

Consider the figure given for solid XY. Answer the following questions: The number of XY units per unit cell is:

What is the graph of {1[A]} vs time for second order reaction looks like?

80mL 0.1M H2SO4 was mixed with 50 mL of 0.1 M NaOH find if final solution is acidic or basic , then find concentration of H+ or OH- ions

00833 mol of carbohydrateof empincall forrmula CHO contan 1g of hydrogen. The malecular formula ofcaohydrate is4 CH,O

The wavelength of the photon emitted, when an electron jumps from fourth orbit to second orbit in hydrogen, is 20.397 cm. Wavelength of the photon emitted for the same transition in He+, is,

12. Which of the following Alkanes can be easily sulphonated? (a) n-Butane (b) Isobutane (c) n-Pentane (d) n-Hexane

Dow's process the appropriate pressure is 320 atm or 300 atm ?

Is it important to always use 6.022 * 10^23 while solving numericals of mole concept or using NA (N subscript A) would be suffice ?

Which of the following catalyst is used in the polymerisation of CH≡CH to C6H6

What is the equation of carbon dioxide and hydrogen peroxide?

9. Why sodium form peroxide

Antiseptics and disinfectants either skill or prevent the growth of microorganisms. Identify which of the following statements is not true.

When 0.15 mol of Ammonia​ is dissolved in water to make 1 L of solution, the [OH]− of solution is 1.34×10−3M. Calculate Kb​ for NH3​.

Among the following, the poorest electrolytic conductor would be

No. Of possible secondary alcohols in C5H12O

what is value of integration of 1/x^2

When 0.15 mol of Ammonia is dissolved in water to make 1 L of solution, the [OH]− of solution is 1.34×10−3M. Calculate Kb for NH3.