46295 + Interview Questions in Chemistry

1.	What is fibres
Answer» What is fibres

Discussion

2.	Molality of aq. NaOH solution having mole fraction of NaOH = 0.1 is
Answer» Molality of aq. NaOH solution having mole fraction of NaOH = 0.1 is

Discussion

3.	Two waves of lengths 50 cm and 51 cm produced 12beats per second. The velocity of sound is how much
Answer» Two waves of lengths 50 cm and 51 cm produced 12beats per second. The velocity of sound is how much

Discussion

4.	Select the hydrocabrons which are members of the same homologous series. Give the name of each series.C3H8, C4H10, C5H10, C6H10, CH12 and C8H16
Answer» Select the hydrocabrons which are members of the same homologous series. Give the name of each series.C3H8, C4H10, C5H10, C6H10, CH12 and C8H16

Discussion

5.	For the elementary reaction M→N the rate of disappearence of M increases by a factor of 8 after doubling the concentration of M. The order of the reaction with respect to M is
Answer» For the elementary reaction $M \to N$ the rate of disappearence of M increases by a factor of 8 after doubling the concentration of M. The order of the reaction with respect to M is

Discussion

6.	reaction of vanadium pentaoxide with calciu
Answer» reaction of vanadium pentaoxide with calciu

Discussion

7.	The vapour pressure of pure liquids 1 and 2 are 550 mm Hg and 800 mm Hg respectively at 350 K.What will be the mole fraction of component 2 in liquid phase when total vapour pressure of the solution is 600 mm Hg?
Answer» The vapour pressure of pure liquids 1 and 2 are $550 m m H g$ and $800 m m H g$ respectively at $350 K$ . What will be the mole fraction of component 2 in liquid phase when total vapour pressure of the solution is $600 m m H g$ ?

Discussion

8.	24. In the fractionating column which liquid reaches up first, the one with low boiling point or the one with higher boiling point?
Answer» 24. In the fractionating column which liquid reaches up first, the one with low boiling point or the one with higher boiling point?

Discussion

9.	100 mL of HCl solution having molarity 1 M is mixed with 400 mL of water. Calculate final molarity of HCl solution.
Answer» $100 mL$ of $H C l$ solution having molarity $1 M$ is mixed with $400 mL$ of water. Calculate final molarity of $H C l$ solution.

Discussion

10.	what amount of Zn will be required to produce H2 by its action on dilute H2SO4 which will completely react with the oxygen , produced by heating 30 g of KClO3?
Answer» what amount of Zn will be required to produce H2 by its action on dilute H2SO4 which will completely react with the oxygen , produced by heating 30 g of KClO3?

Discussion

11.	Acetaldehyde and excess ethyl alchohol reacts in presence of dry HCl gas. The product obtained is :
Answer» Acetaldehyde and excess ethyl alchohol reacts in presence of dry HCl gas. The product obtained is :

Discussion

12.	What is the product when ethyl bromide is reacted with Mg/dry eather followed by acetic acida)ethanolb)butanoic acidc)ethaned)propanoic acid
Answer» What is the product when ethyl bromide is reacted with Mg/dry eather followed by acetic acid a)ethanol b)butanoic acid c)ethane d)propanoic acid

Discussion

13.	A tertiary alcohol H upon acid catalyzed dehydration gives a product I. Ozonolysis of I leads to compounds J and K.Compound J upon reaction with KOH gives benzyl alcohol and a compound L, whereas K on reaction with KOH gives only M. The structure of compound I is
Answer» A tertiary alcohol H upon acid catalyzed dehydration gives a product I. Ozonolysis of I leads to compounds J and K.Compound J upon reaction with KOH gives benzyl alcohol and a compound L, whereas K on reaction with KOH gives only M. The structure of compound I is

Discussion

14.	'P' from the above reaction is:
Answer» 'P' from the above reaction is:

Discussion

15.	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

16.	What happens when 1- Toluene reacts with N.B.S
Answer» What happens when 1- Toluene reacts with N.B.S

Discussion

17.	Which of the following is oxidised by KMnO4
Answer» Which of the following is oxidised by $K M n O_{4}$

Discussion

18.	Among the following ions which one has the highest paramagnetism?
Answer» Among the following ions which one has the highest paramagnetism?

Discussion

19.	A 38% solution of sulphuric acid is used as electrolyte.(Density=1.294 gmL-¹).The battery , holds 3.5 L of the acid. During the discharge of the battery, the density of H2so4 falls to 1.139 mL-¹. (20% h2so4 by mass). What is the Molarity of sulphuric acid before discharge?
Answer» A 38% solution of sulphuric acid is used as electrolyte.(Density=1.294 gmL-¹).The battery , holds 3.5 L of the acid. During the discharge of the battery, the density of H2so4 falls to 1.139 mL-¹. (20% h2so4 by mass). What is the Molarity of sulphuric acid before discharge?

Discussion

20.	16. Low spin complex of d6 action in an octahedral field will have energy?
Answer» 16. Low spin complex of d6 action in an octahedral field will have energy?

Discussion

21.	28. 20g of Mgco3react and gives 8g of Mgo and Co2 then find the purity of Mgco3
Answer» 28. 20g of Mgco3react and gives 8g of Mgo and Co2 then find the purity of Mgco3

Discussion

22.	Two moles of a gas at temperature T and volume V are heated to twice its volume at constant pressure if Cp/Cv=y then increase in internal energy of the gas is 1)RT/y-1 2)2RT/y-1 3)2RT/3(y-1) 4)2T/y-1
Answer» Two moles of a gas at temperature T and volume V are heated to twice its volume at constant pressure if Cp/Cv=y then increase in internal energy of the gas is 1)RT/y-1 2)2RT/y-1 3)2RT/3(y-1) 4)2T/y-1

Discussion

23.	If wavelength λ e of an electron and λ p of a photon of same energy E are related b
Answer» If wavelength λ e of an electron and λ p of a photon of same energy E are related b

Discussion

24.	The correct statement regarding O2+ is
Answer» The correct statement regarding O $_{2}$ $^{+}$ is

24.

The correct statement regarding O2+ is

Answer»

The correct statement regarding O $_{2}$ $^{+}$ is

Discussion

25.	The thermal decomposition of a HCOOH is a first order reaction with rate constant of 2.4 10power -3 per second at a certain temperature .calculate how long will it take for the third fourth of initial quantity of HCOOH to decompose?
Answer» The thermal decomposition of a HCOOH is a first order reaction with rate constant of 2.4 10power -3 per second at a certain temperature .calculate how long will it take for the third fourth of initial quantity of HCOOH to decompose?

Discussion

26.	Which of the following oxides of chromium is amphoteric in nature
Answer» Which of the following oxides of chromium is amphoteric in nature

Discussion

27.	5. K3crO8 Oxidation number of cr & structure
Answer» 5. K3crO8 Oxidation number of cr & structure

Discussion

28.	If the number of aromatic compounds in the given set of compounds is X, and the number of non-aromatic compounds in the same set is Y, then, X+Y is: .
Answer» If the number of aromatic compounds in the given set of compounds is X, and the number of non-aromatic compounds in the same set is Y, then, X+Y is: .

Discussion

29.	In acid rain sulfuric acid and nitric acid are formed. Please give the reactions?
Answer» In acid rain sulfuric acid and nitric acid are formed. Please give the reactions?

Discussion

30.	Rationalise the given statements and give chemical reactions: • Lead (II) chloride reacts with Cl2 to give PbCl4. • Lead (IV) chloride is highly unstable towards heat. • Lead is known not to form an iodide, PbI4.
Answer» Rationalise the given statements and give chemical reactions: • Lead (II) chloride reacts with $C l_{2}$ to give $P b C l_{4}$ . • Lead (IV) chloride is highly unstable towards heat. • Lead is known not to form an iodide, $P b I_{4}$ .

Discussion

31.	The number of electrons in 540ml of water at 4'c is
Answer» The number of electrons in 540ml of water at 4'c is

Discussion

32.	Complete the following reactions:
Answer» Complete the following reactions:

Discussion

33.	The fluoride of Xenon with zero dipole moment is:
Answer» The fluoride of Xenon with zero dipole moment is:

Discussion

34.	48.Why does the melting and boiling point of group 16 elements increases on going down the group?
Answer» 48.Why does the melting and boiling point of group 16 elements increases on going down the group?

Discussion

35.	An element, X has the following isotopic composition; 200X:90%;199X:8.0%;202X:2.0%. The weighted average atomic mass of the naturally occurring element X is closest to :
Answer» An element, X has the following isotopic composition; $^{200} X : 90 %;^{199} X : 8.0 %;^{202} X : 2.0 % .$ The weighted average atomic mass of the naturally occurring element X is closest to :

Discussion

36.	13. What will be the packing fraction of NaCl crystal ? How to calculate it ?
Answer» 13. What will be the packing fraction of NaCl crystal ? How to calculate it ?

Discussion

37.	The ionization constantof acetic acid is 1.74 × 10.Calculate the degree ofdissociation of aceticacid in its 0.05 M solution. Calculate the concentration of acetateion in the solution and its pH.
Answer» The ionization constant of acetic acid is 1.74 × 10. Calculate the degree of dissociation of acetic acid in its 0.05 M solution. Calculate the concentration of acetate ion in the solution and its pH.

37.

The ionization constantof acetic acid is 1.74 × 10.Calculate the degree ofdissociation of aceticacid in its 0.05 M solution. Calculate the concentration of acetateion in the solution and its pH.

Answer»

The ionization constant
of acetic acid is 1.74 × 10.
Calculate the degree of

dissociation of acetic
acid in its 0.05 M solution. Calculate the concentration of acetate
ion in the solution and its pH.

Discussion

38.	the conductivity of saturated solution of silver oxalate is 4.5×10^{-5}ohm^{-1}cm^{-1}.if its K_{sp}=1.35×10^{-11}M^3.the molar conductivity of saturated solution would b
Answer» the conductivity of saturated solution of silver oxalate is 4.5×10^{-5}ohm^{-1}cm^{-1}.if its K_{sp}=1.35×10^{-11}M^3.the molar conductivity of saturated solution would b

Discussion

39.	BF3 is planar and electron deficient compound. Hybridisation and number of electrons around the central atom, respectively are:
Answer» $B F_{3}$ is planar and electron deficient compound. Hybridisation and number of electrons around the central atom, respectively are:

Discussion

40.	Question 12Write the molecular formulae for the following compounds(a) Copper (II) bromide(b) Aluminium (III) nitrate(c) Calcium (II) phosphate(d) Iron (III) sulphide(e) Mercury (II) chloride(f) Magnesium (II) acetate
Answer» Question 12 Write the molecular formulae for the following compounds (a) Copper (II) bromide (b) Aluminium (III) nitrate (c) Calcium (II) phosphate (d) Iron (III) sulphide (e) Mercury (II) chloride (f) Magnesium (II) acetate

40.

Question 12Write the molecular formulae for the following compounds(a) Copper (II) bromide(b) Aluminium (III) nitrate(c) Calcium (II) phosphate(d) Iron (III) sulphide(e) Mercury (II) chloride(f) Magnesium (II) acetate

Answer»

Question 12

Write the molecular formulae for the following compounds

(a) Copper (II) bromide

(b) Aluminium (III) nitrate

(c) Calcium (II) phosphate

(d) Iron (III) sulphide

(e) Mercury (II) chloride

(f) Magnesium (II) acetate

Discussion

41.	A person is detected with polycythemia. Which radioactive isotope can be used for his treatment?
Answer» A person is detected with polycythemia. Which radioactive isotope can be used for his treatment?

Discussion

42.	What is the chemical formula of Calamine?
Answer» What is the chemical formula of Calamine?

Discussion

43.	Which is the best reaction for preparation of t-butyl ethyl ether ?
Answer» Which is the best reaction for preparation of t-butyl ethyl ether ?

Discussion

44.	how to find whether the compounds is ccp or hcp?
Answer» how to find whether the compounds is ccp or hcp?

Discussion

45.	In the reaction : [Ag(CN)2]– + Zn → the complex formed will betetrahedral. WHY----
Answer» In the reaction : [Ag(CN)2]– + Zn → the complex formed will be tetrahedral. WHY----

Discussion

46.	Which reagent converts CH,-CH-CH-CHO to CH-CH-CH-COO (1) KMno,/OH (2) [Ag(NH3l /OH (3) both1 and 2(4) None of these
Answer» Which reagent converts CH,-CH-CH-CHO to CH-CH-CH-COO (1) KMno,/OH (2) [Ag(NH3l /OH (3) both1 and 2(4) None of these

Discussion

47.	The fraction of total volume occupied by the atoms in a simple cube is -
Answer» The fraction of total volume occupied by the atoms in a simple cube is -

Discussion

48.	The correct order of the stability for the given carbanions is:
Answer» The correct order of the stability for the given carbanions is:

Discussion

49.	For the reaction at 300 K, A(g)⇌V(g)+S(g)△rHo=−30 kJ/mol, △rSo=−0.1 kJ K−1.mol−1What is the value of equilibrium constant?
Answer» For the reaction at $300 K$ , $A (g) ⇌ V (g) + S (g)$ $△_{r} H^{o} = - 30 k J / m o l, △_{r} S^{o} = - 0.1 k J K^{- 1} . m o l^{- 1}$ What is the value of equilibrium constant?

Discussion

50.	Discuss barrier protection methods for the prevention of corrosion of iron.
Answer» Discuss barrier protection methods for the prevention of corrosion of iron.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is fibres

Molality of aq. NaOH solution having mole fraction of NaOH = 0.1 is

Two waves of lengths 50 cm and 51 cm produced 12beats per second. The velocity of sound is how much

Select the hydrocabrons which are members of the same homologous series. Give the name of each series.C3H8, C4H10, C5H10, C6H10, CH12 and C8H16

For the elementary reaction M→N the rate of disappearence of M increases by a factor of 8 after doubling the concentration of M. The order of the reaction with respect to M is

reaction of vanadium pentaoxide with calciu

The vapour pressure of pure liquids 1 and 2 are 550 mm Hg and 800 mm Hg respectively at 350 K.What will be the mole fraction of component 2 in liquid phase when total vapour pressure of the solution is 600 mm Hg?

24. In the fractionating column which liquid reaches up first, the one with low boiling point or the one with higher boiling point?

100 mL of HCl solution having molarity 1 M is mixed with 400 mL of water. Calculate final molarity of HCl solution.

what amount of Zn will be required to produce H2 by its action on dilute H2SO4 which will completely react with the oxygen , produced by heating 30 g of KClO3?

Acetaldehyde and excess ethyl alchohol reacts in presence of dry HCl gas. The product obtained is :

What is the product when ethyl bromide is reacted with Mg/dry eather followed by acetic acida)ethanolb)butanoic acidc)ethaned)propanoic acid

A tertiary alcohol H upon acid catalyzed dehydration gives a product I. Ozonolysis of I leads to compounds J and K.Compound J upon reaction with KOH gives benzyl alcohol and a compound L, whereas K on reaction with KOH gives only M. The structure of compound I is

'P' from the above reaction is:

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 happens when 1- Toluene reacts with N.B.S

Which of the following is oxidised by KMnO4

Among the following ions which one has the highest paramagnetism?

A 38% solution of sulphuric acid is used as electrolyte.(Density=1.294 gmL-¹).The battery , holds 3.5 L of the acid. During the discharge of the battery, the density of H2so4 falls to 1.139 mL-¹. (20% h2so4 by mass). What is the Molarity of sulphuric acid before discharge?

16. Low spin complex of d6 action in an octahedral field will have energy?

28. 20g of Mgco3react and gives 8g of Mgo and Co2 then find the purity of Mgco3

Two moles of a gas at temperature T and volume V are heated to twice its volume at constant pressure if Cp/Cv=y then increase in internal energy of the gas is 1)RT/y-1 2)2RT/y-1 3)2RT/3(y-1) 4)2T/y-1

If wavelength λ e of an electron and λ p of a photon of same energy E are related b

The correct statement regarding O2+ is

The thermal decomposition of a HCOOH is a first order reaction with rate constant of 2.4 10power -3 per second at a certain temperature .calculate how long will it take for the third fourth of initial quantity of HCOOH to decompose?

Which of the following oxides of chromium is amphoteric in nature

5. K3crO8 Oxidation number of cr & structure

If the number of aromatic compounds in the given set of compounds is X, and the number of non-aromatic compounds in the same set is Y, then, X+Y is: .

In acid rain sulfuric acid and nitric acid are formed. Please give the reactions?

Rationalise the given statements and give chemical reactions: • Lead (II) chloride reacts with Cl2 to give PbCl4. • Lead (IV) chloride is highly unstable towards heat. • Lead is known not to form an iodide, PbI4.

The number of electrons in 540ml of water at 4'c is

Complete the following reactions:

The fluoride of Xenon with zero dipole moment is:

48.Why does the melting and boiling point of group 16 elements increases on going down the group?

An element, X has the following isotopic composition; 200X:90%;199X:8.0%;202X:2.0%. The weighted average atomic mass of the naturally occurring element X is closest to :

13. What will be the packing fraction of NaCl crystal ? How to calculate it ?

The ionization constantof acetic acid is 1.74 × 10.Calculate the degree ofdissociation of aceticacid in its 0.05 M solution. Calculate the concentration of acetateion in the solution and its pH.

the conductivity of saturated solution of silver oxalate is 4.5×10^{-5}ohm^{-1}cm^{-1}.if its K_{sp}=1.35×10^{-11}M^3.the molar conductivity of saturated solution would b

BF3 is planar and electron deficient compound. Hybridisation and number of electrons around the central atom, respectively are:

Question 12Write the molecular formulae for the following compounds(a) Copper (II) bromide(b) Aluminium (III) nitrate(c) Calcium (II) phosphate(d) Iron (III) sulphide(e) Mercury (II) chloride(f) Magnesium (II) acetate

A person is detected with polycythemia. Which radioactive isotope can be used for his treatment?

What is the chemical formula of Calamine?

Which is the best reaction for preparation of t-butyl ethyl ether ?

how to find whether the compounds is ccp or hcp?

In the reaction : [Ag(CN)2]– + Zn → the complex formed will betetrahedral. WHY----

Which reagent converts CH,-CH-CH-CHO to CH-CH-CH-COO (1) KMno,/OH (2) [Ag(NH3l /OH (3) both1 and 2(4) None of these

The fraction of total volume occupied by the atoms in a simple cube is -

The correct order of the stability for the given carbanions is:

For the reaction at 300 K, A(g)⇌V(g)+S(g)△rHo=−30 kJ/mol, △rSo=−0.1 kJ K−1.mol−1What is the value of equilibrium constant?

Discuss barrier protection methods for the prevention of corrosion of iron.