46295 + Interview Questions in Chemistry

1.	The molar solubility of Zn(OH)2 in 0.1 M NaOH solution is x×10−18M. The value of x is .......(Nearest integer)(Given: The solubility product of Zn(OH)2 is 2×10−20)
Answer» The molar solubility of $Z n {(O H)}_{2}$ in 0.1 M NaOH solution is $x \times 10^{- 18} M$ . The value of x is .......(Nearest integer) (Given: The solubility product of $Z n (O H)_{2} is 2 \times 10^{- 20}$ )

Discussion

2.	What is the volume occupied by spheres of a body centred cubic unit cell?
Answer» What is the volume occupied by spheres of a body centred cubic unit cell?

Discussion

3.	Which of the following reagents could be used to distinguish between propan-2-ol and tert-butyl alcohol?
Answer» Which of the following reagents could be used to distinguish between propan-2-ol and tert-butyl alcohol?

Discussion

4.	What is the difference between chiral carbon and an anomeric carbon
Answer» What is the difference between chiral carbon and an anomeric carbon

Discussion

5.	When formaldehyde reacts with melamine, it forms:
Answer» When formaldehyde reacts with melamine, it forms:

Discussion

6.	10. Explain Serpecks method of heating bauxite
Answer» 10. Explain Serpecks method of heating bauxite

Discussion

7.	Which of the following will have highest melting point?
Answer» Which of the following will have highest melting point?

Discussion

8.	If lattice site in a pure crystal cannot be occupied by electrons then how do electrons occupy the anionic vacancies in metal excess defect
Answer» If lattice site in a pure crystal cannot be occupied by electrons then how do electrons occupy the anionic vacancies in metal excess defect

Discussion

9.	What is the reaction of Silicon Carbide with water?
Answer» What is the reaction of Silicon Carbide with water?

Discussion

10.	Arrange the following in increasing order of their radius 1) Cr Mo W 2) H- Li+ Be2+3) N O P S
Answer» Arrange the following in increasing order of their radius 1) Cr Mo W 2) H- Li+ Be2+ 3) N O P S

Discussion

11.	1g mixture of CaCO_{3_{}} and NaCl react completely with 100 ml of N/10 HCl. The % of CaCO_{3_{}} in the mixture is
Answer» 1g mixture of CaCO_{3_{}} and NaCl react completely with 100 ml of N/10 HCl. The % of CaCO_{3_{}} in the mixture is

Discussion

12.	The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is:
Answer» The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is:

Discussion

13.	33. Phenol, when it first reacted with concentrated sulphuric acid and then with concentrated nitric acid, gives A)2,4,6-trinitrophenol B)o-nitrophenol C)p-nitrophenol D)nitrobenzene
Answer» 33. Phenol, when it first reacted with concentrated sulphuric acid and then with concentrated nitric acid, gives A)2,4,6-trinitrophenol B)o-nitrophenol C)p-nitrophenol D)nitrobenzene

Discussion

14.	Oxidation states of P in H4P2O5,H4P2O6,H4P2O7 are respectively:
Answer» Oxidation states of P in $H_{4} P_{2} O_{5}, H_{4} P_{2} O_{6}, H_{4} P_{2} O_{7}$ are respectively:

Discussion

15.	30 mL of a solution containing 9.15 gm L−1 of an oxalate KxHy(C2O4)z.nH2O are required for titrating 27 mL of 0.12 N NaOH and 36 mL of 0.12 M KMnO4 separately. The value of x+y+z is:
Answer» $30 m L$ of a solution containing $9.15 g m L^{- 1}$ of an oxalate $K_{x} H_{y} (C_{2} O_{4})_{z} . n H_{2} O$ are required for titrating $27 m L$ of $0.12 N N a O H$ and $36 m L$ of $0.12 M K M n O_{4}$ separately. The value of $x + y + z$ is:

Discussion

16.	There is possible of rotating motion in one dimension
Answer» There is possible of rotating motion in one dimension

Discussion

17.	For the redox reactionMnO−4+C2O−24+H+⟶Mn2++CO2+H2Othe correct coefficients of the reactants MnO−4, C2O2−4 and H+ for the balanced reaction are
Answer» For the redox reaction $M n O_{4}^{-} + C_{2} O_{4}^{- 2} + H^{+} ⟶ M n^{2 +} + C O_{2} + H_{2} O$ the correct coefficients of the reactants $M n O_{4}^{-}, C_{2} O_{4}^{2 -} a n d H^{+}$ for the balanced reaction are

Discussion

18.	26. Which will show lowest first ionisation energy? A)N B)O C)P D)S
Answer» 26. Which will show lowest first ionisation energy? A)N B)O C)P D)S

Discussion

19.	How much minimum volume of co at stp is needed to react completely with 0.112 l of o2 at 1.5 atm pressure and 127 c to give co2?
Answer» How much minimum volume of co at stp is needed to react completely with 0.112 l of o2 at 1.5 atm pressure and 127 c to give co2?

Discussion

20.	What is the hybridization on carbon (2)?
Answer» What is the hybridization on carbon (2)?

20.

What is the hybridization on carbon (2)?

Answer»

What is the hybridization on carbon (2)?

Discussion

21.	Eqimolar solutions of these are prepared separetely which one of these will record highest value of ph and WHY( with proper scientifical explanations)? 1)BaCl2 2)AlCl3 3)LiCl 4)BeCl2
Answer» Eqimolar solutions of these are prepared separetely which one of these will record highest value of ph and WHY( with proper scientifical explanations)? 1)BaCl₂ 2)AlCl₃ ₃₎LiCl ₄₎BeCl₂

21.

Eqimolar solutions of these are prepared separetely which one of these will record highest value of ph and WHY( with proper scientifical explanations)? 1)BaCl2 2)AlCl3 3)LiCl 4)BeCl2

Answer»

Eqimolar solutions of these are prepared separetely which one of these will record highest value of ph and WHY( with proper scientifical explanations)?

1)BaCl₂

2)AlCl₃

₃₎LiCl

₄₎BeCl₂

Discussion

22.	what is the meaning of term intensity
Answer» what is the meaning of term intensity

Discussion

23.	Which of the following pairs.will form the most stable ionic bond.li and f. 2 .mg and.f
Answer» Which of the following pairs.will form the most stable ionic bond.li and f. 2 .mg and.f

Discussion

24.	A circular disc of radius R is free to oscillate about an axis passing through a point on its rim and perpendicular to its plane. The disc is turned through an angle of 60o and released. Its angular velocity when it reaches the equilibrium position will be
Answer» A circular disc of radius R is free to oscillate about an axis passing through a point on its rim and perpendicular to its plane. The disc is turned through an angle of 60o and released. Its angular velocity when it reaches the equilibrium position will be

Discussion

25.	What shall be the minimum percentage error in velocity if the uncertainty in position is equal to the de Broglie wavelength of a particle?
Answer» What shall be the minimum percentage error in velocity if the uncertainty in position is equal to the de Broglie wavelength of a particle?

Discussion

26.	29. Calculate no of sigma bonds pie bonds lone pairin the following molecules 1 xeO2F2 2 H2so4 3 H3po4
Answer» 29. Calculate no of sigma bonds pie bonds lone pairin the following molecules 1 xeO2F2 2 H2so4 3 H3po4

Discussion

27.	Identify the incorrect statement about boric acid(1) Layered polymer due to H-bonding(2) It's aqueous solution strong, lewis acid with cis-1, 2 diol(3) Obtained on heating borax(4) Gives B(OC_2H_5)_3 with C_2H_5OH
Answer» Identify the incorrect statement about boric acid(1) Layered polymer due to H-bonding(2) It's aqueous solution strong, lewis acid with cis-1, 2 diol(3) Obtained on heating borax(4) Gives B(OC_2H_5)_3 with C_2H_5OH

Discussion

28.	A sample of hydrogen gas contains 300 atoms. Each atom is supplied with 10.2 eV of energy. During deexcitation maximum number of spectral lines observed are 1.3002.503.104.1
Answer» A sample of hydrogen gas contains 300 atoms. Each atom is supplied with 10.2 eV of energy. During deexcitation maximum number of spectral lines observed are 1.300 2.50 3.10 4.1

Discussion

29.	why does only HBr show peroxide effect ?
Answer» why does only HBr show peroxide effect ?

Discussion

30.	Chlorobenzene on reaction with sodium in presence of dry ether forms:
Answer» Chlorobenzene on reaction with sodium in presence of dry ether forms:

Discussion

31.	If dipole moment of HI is 0.38 D and bond lengthof HI is 1.6 A, then percentage covalent characterin HI bond is(1) 4.95%(2) 5.9%(3) 95.05%(4) 47.5%
Answer» If dipole moment of HI is 0.38 D and bond lengthof HI is 1.6 A, then percentage covalent characterin HI bond is(1) 4.95%(2) 5.9%(3) 95.05%(4) 47.5%

Discussion

32.	when 1gm ice at -50 degree celcius is mixed with 1 gm water at 50 degree celcius then final temp & composition i
Answer» when 1gm ice at -50 degree celcius is mixed with 1 gm water at 50 degree celcius then final temp & composition i

Discussion

33.	20.Total no of bond angle of 120 & 109.28 in toluene , acetylene,vinyl acetylene is …
Answer» 20.Total no of bond angle of 120 & 109.28 in toluene , acetylene,vinyl acetylene is …

Discussion

34.	An ideal gas is taken through the cycle A→B→C→A as shown in figure. If the heat supplied to the gas in the cycle is 5 J. The work done by the gas in the process C→A
Answer» An ideal gas is taken through the cycle $A \to B \to C \to A$ as shown in figure. If the heat supplied to the gas in the cycle is $5 J$ . The work done by the gas in the process $C \to A$

Discussion

35.	For the reaction, N2(g)+3H2(g)⇌2NH3(g), equilibrium constant KC is:
Answer» For the reaction, $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)$ , equilibrium constant $K_{C}$ is:

Discussion

36.	A vessel contains a non-linear triatomic gas. If 50% of gas dissociate into individual atom, then find new value of degree of freedom by ignoring the vibrational mode and any further dissociation. (1) 2.15 (3) 5.25 (2) 3.75 (4) 6.35
Answer» A vessel contains a non-linear triatomic gas. If 50% of gas dissociate into individual atom, then find new value of degree of freedom by ignoring the vibrational mode and any further dissociation. (1) 2.15 (3) 5.25 (2) 3.75 (4) 6.35

Discussion

37.	Glycerol is a [DPMT 1984, 2000; MP PET 2001; J & K 2005]
Answer» Glycerol is a [DPMT 1984, 2000; MP PET 2001; J & K 2005]

Discussion

38.	The expanded form of DDT is:
Answer» The expanded form of DDT is:

Discussion

39.	22.Maximum number of orbital are present for which set of quantum number? (1) l = 2, m = 2 (2) l = 1, m = 0 (3) l = 0, m = 0 (4) l = 3, m = 0
Answer» 22.Maximum number of orbital are present for which set of quantum number? (1) l = 2, m = 2 (2) l = 1, m = 0 (3) l = 0, m = 0 (4) l = 3, m = 0

Discussion

40.	31. How propanone is converted into mesitylene in presence of concentrated sulphuric acid?
Answer» 31. How propanone is converted into mesitylene in presence of concentrated sulphuric acid?

Discussion

41.	What is an oxidation reaction? Identify in the following reaction (a) the substance oxidized, and (b) the substance reduced:ZnO + C → Zn + CO
Answer» What is an oxidation reaction? Identify in the following reaction (a) the substance oxidized, and (b) the substance reduced: ZnO + C → Zn + CO

Discussion

42.	In the closest packing of spheres of uniform size, the ratio of radii of octahedral and tetrahedral holes is :
Answer» In the closest packing of spheres of uniform size, the ratio of radii of octahedral and tetrahedral holes is :

Discussion

43.	Which one of the following aldehyde gives Cannizzaro reaction when heated with strong alkali?
Answer» Which one of the following aldehyde gives Cannizzaro reaction when heated with strong alkali?

Discussion

44.	which is more stable CH3-O-CH2+ OR OH-CH2+ ?
Answer» which is more stable CH3-O-CH2+ OR OH-CH2+ ?

Discussion

45.	Can √a be in negative form??
Answer» Can √a be in negative form??

Discussion

46.	how octahedral voids are surrounded by 8 spheres?
Answer» how octahedral voids are surrounded by 8 spheres?

Discussion

47.	What is the work done in this case?Request solution with explanation
Answer» What is the work done in this case? Request solution with explanation

Discussion

48.	What will be molarity of chloroform in the water sample which contains 15ppm chloroform by mass? (mass of chloroform=119.5)
Answer» What will be molarity of chloroform in the water sample which contains 15ppm chloroform by mass? (mass of chloroform=119.5)

Discussion

49.	Which of the following is not optically active?
Answer» Which of the following is not optically active?

Discussion

50.	what is packing fraction and alpha and beta deacy?
Answer» what is packing fraction and alpha and beta deacy?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The molar solubility of Zn(OH)2 in 0.1 M NaOH solution is x×10−18M. The value of x is .......(Nearest integer)(Given: The solubility product of Zn(OH)2 is 2×10−20)

What is the volume occupied by spheres of a body centred cubic unit cell?

Which of the following reagents could be used to distinguish between propan-2-ol and tert-butyl alcohol?

What is the difference between chiral carbon and an anomeric carbon

When formaldehyde reacts with melamine, it forms:

10. Explain Serpecks method of heating bauxite

Which of the following will have highest melting point?

If lattice site in a pure crystal cannot be occupied by electrons then how do electrons occupy the anionic vacancies in metal excess defect

What is the reaction of Silicon Carbide with water?

Arrange the following in increasing order of their radius 1) Cr Mo W 2) H- Li+ Be2+3) N O P S

1g mixture of CaCO_{3_{}} and NaCl react completely with 100 ml of N/10 HCl. The % of CaCO_{3_{}} in the mixture is

The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is:

33. Phenol, when it first reacted with concentrated sulphuric acid and then with concentrated nitric acid, gives A)2,4,6-trinitrophenol B)o-nitrophenol C)p-nitrophenol D)nitrobenzene

Oxidation states of P in H4P2O5,H4P2O6,H4P2O7 are respectively:

30 mL of a solution containing 9.15 gm L−1 of an oxalate KxHy(C2O4)z.nH2O are required for titrating 27 mL of 0.12 N NaOH and 36 mL of 0.12 M KMnO4 separately. The value of x+y+z is:

There is possible of rotating motion in one dimension

For the redox reactionMnO−4+C2O−24+H+⟶Mn2++CO2+H2Othe correct coefficients of the reactants MnO−4, C2O2−4 and H+ for the balanced reaction are

26. Which will show lowest first ionisation energy? A)N B)O C)P D)S

How much minimum volume of co at stp is needed to react completely with 0.112 l of o2 at 1.5 atm pressure and 127 c to give co2?

What is the hybridization on carbon (2)?

Eqimolar solutions of these are prepared separetely which one of these will record highest value of ph and WHY( with proper scientifical explanations)? 1)BaCl2 2)AlCl3 3)LiCl 4)BeCl2

what is the meaning of term intensity

Which of the following pairs.will form the most stable ionic bond.li and f. 2 .mg and.f

A circular disc of radius R is free to oscillate about an axis passing through a point on its rim and perpendicular to its plane. The disc is turned through an angle of 60o and released. Its angular velocity when it reaches the equilibrium position will be

What shall be the minimum percentage error in velocity if the uncertainty in position is equal to the de Broglie wavelength of a particle?

29. Calculate no of sigma bonds pie bonds lone pairin the following molecules 1 xeO2F2 2 H2so4 3 H3po4

Identify the incorrect statement about boric acid(1) Layered polymer due to H-bonding(2) It's aqueous solution strong, lewis acid with cis-1, 2 diol(3) Obtained on heating borax(4) Gives B(OC_2H_5)_3 with C_2H_5OH

A sample of hydrogen gas contains 300 atoms. Each atom is supplied with 10.2 eV of energy. During deexcitation maximum number of spectral lines observed are 1.3002.503.104.1

why does only HBr show peroxide effect ?

Chlorobenzene on reaction with sodium in presence of dry ether forms:

If dipole moment of HI is 0.38 D and bond lengthof HI is 1.6 A, then percentage covalent characterin HI bond is(1) 4.95%(2) 5.9%(3) 95.05%(4) 47.5%

when 1gm ice at -50 degree celcius is mixed with 1 gm water at 50 degree celcius then final temp & composition i

20.Total no of bond angle of 120 & 109.28 in toluene , acetylene,vinyl acetylene is …

An ideal gas is taken through the cycle A→B→C→A as shown in figure. If the heat supplied to the gas in the cycle is 5 J. The work done by the gas in the process C→A

For the reaction, N2(g)+3H2(g)⇌2NH3(g), equilibrium constant KC is:

A vessel contains a non-linear triatomic gas. If 50% of gas dissociate into individual atom, then find new value of degree of freedom by ignoring the vibrational mode and any further dissociation. (1) 2.15 (3) 5.25 (2) 3.75 (4) 6.35

Glycerol is a [DPMT 1984, 2000; MP PET 2001; J &amp; K 2005]

The expanded form of DDT is:

22.Maximum number of orbital are present for which set of quantum number? (1) l = 2, m = 2 (2) l = 1, m = 0 (3) l = 0, m = 0 (4) l = 3, m = 0

31. How propanone is converted into mesitylene in presence of concentrated sulphuric acid?

What is an oxidation reaction? Identify in the following reaction (a) the substance oxidized, and (b) the substance reduced:ZnO + C → Zn + CO

In the closest packing of spheres of uniform size, the ratio of radii of octahedral and tetrahedral holes is :

Which one of the following aldehyde gives Cannizzaro reaction when heated with strong alkali?

which is more stable CH3-O-CH2+ OR OH-CH2+ ?

Can √a be in negative form??

how octahedral voids are surrounded by 8 spheres?

What is the work done in this case?Request solution with explanation

What will be molarity of chloroform in the water sample which contains 15ppm chloroform by mass? (mass of chloroform=119.5)

Which of the following is not optically active?

what is packing fraction and alpha and beta deacy?

Glycerol is a [DPMT 1984, 2000; MP PET 2001; J & K 2005]