46295 + Interview Questions in Chemistry

1.	Which one is a Lewis acid
Answer» Which one is a Lewis acid

Discussion

2.	On heating NaNO3, it gives : -
Answer» On heating $N a N O_{3}$ , it gives : -

Discussion

3.	Which of the following compounds shows both Frenkel and Schottky defects:
Answer» Which of the following compounds shows both Frenkel and Schottky defects:

Discussion

4.	Which of the following does not have a metal carbon bond?
Answer» Which of the following does not have a metal carbon bond?

Discussion

5.	The reduction potential of hydrogen electrode will be positive if
Answer» The reduction potential of hydrogen electrode will be positive if

Discussion

6.	Which series of reactions will achieve the following transformation?
Answer» Which series of reactions will achieve the following transformation?

6.

Which series of reactions will achieve the following transformation?

Answer»

Which series of reactions will achieve the following transformation?

Discussion

7.	The compound not isomeric with diethyl ether is
Answer» The compound not isomeric with diethyl ether is

Discussion

8.	What is the effect of temperature on specific rate of a reaction ?
Answer» What is the effect of temperature on specific rate of a reaction ?

Discussion

9.	Compounds P and R upon ozonolysis produce Q and S, respectively. The molecular formula of Q and S is C8H8O. Q undergoes Cannizzaro reaction but not haloform reaction, whereas S undergoes haloform reaction but not Cannizzaro reaction. (i) Pi) O3/CH2Cl2−−−−−−−−−→ii) Zn/H2OQ(C8H8O) (ii) Ri) O3/CH2Cl2−−−−−−−−−→ii) Zn/H2OS(C8H8O) The option(s) with suitable combination of P and R, respectively, is(are):
Answer» Compounds P and R upon ozonolysis produce Q and S, respectively. The molecular formula of Q and S is $C_{8} H_{8} O$ . Q undergoes Cannizzaro reaction but not haloform reaction, whereas S undergoes haloform reaction but not Cannizzaro reaction. (i) $P i) O_{3} / C H_{2} C l_{2} - -------- \to i i) Z n / H_{2} O Q (C_{8} H_{8} O)$ (ii) $R i) O_{3} / C H_{2} C l_{2} - -------- \to i i) Z n / H_{2} O S (C_{8} H_{8} O)$ The option(s) with suitable combination of P and R, respectively, is(are):

Discussion

10.	The major product of the following reaction is:
Answer» The major product of the following reaction is:

Discussion

11.	The correct order of rate of SN2 reactivity of H2O, −OCH3, −OH and CH3COO− is
Answer» The correct order of rate of ${S_{N}}^{2}$ reactivity of $H_{2} O$ , $^{-} O C H_{3},^{-} O H$ and $C H_{3} C O O^{-}$ is

Discussion

12.	Which of the following displaces bromine from an aqueous solution of bromide ions?
Answer» Which of the following displaces bromine from an aqueous solution of bromide ions?

Discussion

13.	The radial distribution functions for all orbitals is given by:
Answer» The radial distribution functions for all orbitals is given by:

Discussion

14.	Sir/ Madam Whycan't ozone be a reducing agent? The highest oxidation state of oxygen is +2 which is possible when it combines with fluorine. Now then, why can't ozone be a reducing agent? What happens when ozone reacts with fluorine or fluorine containing compound? Please explain in detail.
Answer» Sir/ Madam Whycan't ozone be a reducing agent? The highest oxidation state of oxygen is +2 which is possible when it combines with fluorine. Now then, why can't ozone be a reducing agent? What happens when ozone reacts with fluorine or fluorine containing compound? Please explain in detail.

14.

Sir/ Madam Whycan't ozone be a reducing agent? The highest oxidation state of oxygen is +2 which is possible when it combines with fluorine. Now then, why can't ozone be a reducing agent? What happens when ozone reacts with fluorine or fluorine containing compound? Please explain in detail.

Answer»

Sir/ Madam

Whycan't ozone be a reducing agent?

The highest oxidation state of oxygen is +2 which is possible when it combines with fluorine. Now then, why can't ozone be a reducing agent?

What happens when ozone reacts with fluorine or fluorine containing compound?

Please explain in detail.

Discussion

15.	Which of the following most accurately describes the first step in the reaction of HCl with but-1-ene?
Answer» Which of the following most accurately describes the first step in the reaction of $H C l$ with but-1-ene?

Discussion

16.	Copper crystallises into a fcc lattice with edge length 3.61×10−8cm. Show that the calculated density is in agreement with its measured value of 8.92 g cm−3
Answer» Copper crystallises into a fcc lattice with edge length $3.61 \times 10^{- 8} c m .$ Show that the calculated density is in agreement with its measured value of $8.92 g c m^{- 3}$

Discussion

17.	If the threshold wavelength (λo) of a metal is 330 nm, then the work function for the photoelectric emission is:
Answer» If the threshold wavelength $(λ^{o})$ of a metal is $330 nm$ , then the work function for the photoelectric emission is:

Discussion

18.	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 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 The structure of compound I is

18.

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 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

The structure of compound I is

Discussion

19.	If Z is a compressibility factor, Van der Waals equation at low pressure can be written as
Answer» If Z is a compressibility factor, Van der Waals equation at low pressure can be written as

Discussion

20.	A known mass of oxalic acid dihydrate is dissolved in water to make 100 ml solution. 10 ml of this solution is diluted to 100 ml. 20 mL of the solution requires 20 mL of 0.1 N NaOH for complete neutralisation. (eq. mass of oxalic acid dihydrate = 63). The mass of oxalic acid in gram in the original solution is
Answer» A known mass of oxalic acid dihydrate is dissolved in water to make 100 ml solution. 10 ml of this solution is diluted to 100 ml. 20 mL of the solution requires 20 mL of 0.1 N NaOH for complete neutralisation. (eq. mass of oxalic acid dihydrate = 63). The mass of oxalic acid in gram in the original solution is

Discussion

21.	In the given reaction CH3−CH2−Br Na/dry ether−−−−−−−−→ Product; Product will be:
Answer» In the given reaction $C H_{3} - C H_{2} - B r$ $N a / d r y e t h e r - ------- \to$ Product; Product will be:

Discussion

22.	The rate of a first-order reaction is 0.04 mol–1s–1 at 10 seconds and 0.03 mol–1s–1 at 20 seconds after initiation of the reaction. The half-life period of the reaction is
Answer» The rate of a first-order reaction is $0.04 m o l^{- 1} s^{- 1}$ at 10 seconds and 0.03 $m o l^{- 1} s^{- 1}$ at 20 seconds after initiation of the reaction. The half-life period of the reaction is

Discussion

23.	The quantity of charge q coulomb passing through a conductor varies with time tsecond according to the relation q=2t2+8t+1 .The current through the conductor at t=1 s is
Answer» The quantity of charge $q$ coulomb passing through a conductor varies with time tsecond according to the relation $q = 2 t^{2} + 8 t + 1$ .The current through the conductor at t=1 s is

Discussion

24.	De-Broglie wavelength of neutron at 27∘C is λ and its wavelength at 927∘C is nλ, then n is (The kinetic energy of the neutron is due to the thermal energy) [Write upto two places after the decimal]
Answer» De-Broglie wavelength of neutron at $27^{\circ} C$ is $λ$ and its wavelength at $927^{\circ} C$ is $n λ$ , then n is (The kinetic energy of the neutron is due to the thermal energy) [Write upto two places after the decimal]

Discussion

25.	What needs to be attached to the carbon-carbon double bond to geometric isomers?
Answer» What needs to be attached to the carbon-carbon double bond to geometric isomers?

Discussion

26.	A collapsible balloon is inflated to a volume of 10 L at a pressure of 1 atm. When the balloon is submerged all the way to the bottom of a lake, its volume reduces to 1.25 L. Assume the atmospheric pressure to be equivalent to a 10 m column of water and that there is no change in the temperature. If the depth of the lake is x×103 cm, what is the value of x?
Answer» A collapsible balloon is inflated to a volume of 10 L at a pressure of 1 atm. When the balloon is submerged all the way to the bottom of a lake, its volume reduces to 1.25 L. Assume the atmospheric pressure to be equivalent to a 10 m column of water and that there is no change in the temperature. If the depth of the lake is $x \times 10^{3} cm$ , what is the value of $x$ ?

Discussion

27.	A mixture of hydrogen and oxygen at one bar pressure contains 20% by weight of hydrogen. Find the partial pressure of hydrogen.
Answer» A mixture of hydrogen and oxygen at one bar pressure contains 20% by weight of hydrogen. Find the partial pressure of hydrogen.

Discussion

28.	Which of the following species has the negative electron gain enthalpy?
Answer» Which of the following species has the negative electron gain enthalpy?

Discussion

29.	The standard potential is given below, of the following at 25∘C. MnO2→Mn3+ E∘=0.95V Mn+3→Mn2+ E∘=1.51V The standard potential of MnO2→Mn2+ is :
Answer» The standard potential is given below, of the following at $25^{\circ} C$ . $M n O_{2} \to M n^{3 +} E^{\circ} = 0.95 V$ $M n^{+ 3} \to M n^{2 +} E^{\circ} = 1.51 V$ The standard potential of $M n O_{2} \to M n^{2 +}$ is :

Discussion

30.	The second line of Lyman series of H coincides with the 6th line of Paschen series of an Ionic species X. The atomic number Z for X is
Answer» The second line of Lyman series of $H$ coincides with the 6th line of Paschen series of an Ionic species X. The atomic number Z for X is

Discussion

31.	Which of the following is a non-aromatic compound?
Answer» Which of the following is a non-aromatic compound?

Discussion

32.	The 5 age group element which exhibit wide range of oxidation States is
Answer» The 5 age group element which exhibit wide range of oxidation States is

Discussion

33.	Which of the following statements about overlap integrals of the various orbital is true - 1)2p>2s>2sp^3>2sp^2>2sp 2)2p>2sp^3>2sp^2>2sp>2s 3)2p>2sp>2sp^2>2sp^3>2s 4)2sp^3>2sp^2>2sp>2p>2s
Answer» Which of the following statements about overlap integrals of the various orbital is true - 1)2p>2s>2sp^3>2sp^2>2sp 2)2p>2sp^3>2sp^2>2sp>2s 3)2p>2sp>2sp^2>2sp^3>2s 4)2sp^3>2sp^2>2sp>2p>2s

33.

Which of the following statements about overlap integrals of the various orbital is true - 1)2p>2s>2sp^3>2sp^2>2sp 2)2p>2sp^3>2sp^2>2sp>2s 3)2p>2sp>2sp^2>2sp^3>2s 4)2sp^3>2sp^2>2sp>2p>2s

Answer»

Which of the following statements about overlap integrals of the various orbital is true -

1)2p>2s>2sp^3>2sp^2>2sp

2)2p>2sp^3>2sp^2>2sp>2s

3)2p>2sp>2sp^2>2sp^3>2s

4)2sp^3>2sp^2>2sp>2p>2s

Discussion

34.	What is 5 litres of a solution in m3 ?
Answer» What is 5 litres of a solution in $m^{3}$ ?

Discussion

35.	Pb3O4+A→2Pb(NO3)2+PbO2+H2
Answer» $P b_{3} O_{4} + A \to 2 P b (N O_{3})_{2} + P b O_{2} + H_{2}$

Discussion

36.	Match the following: 1) i)FCC 2) ii) BCC 3) iii) Primitive
Answer» Match the following: 1) i)FCC 2) ii) BCC 3) iii) Primitive

36.

Match the following: 1) i)FCC 2) ii) BCC 3) iii) Primitive

Answer»

Match the following:

1) i)FCC

2) ii) BCC

3) iii) Primitive

Discussion

37.	Explain isomerism in coordination compounds with examples?
Answer» Explain isomerism in coordination compounds with examples?

Discussion

38.	In given reactions what are the eq.weight of H3PO4? (1)H3PO4 + OH- = H2PO 4 + H2O (2)H3PO4 + 2OH- = HPO42-+ H2O (3)H3PO4 + 3OH- = PO43- + 3H2O
Answer» In given reactions what are the eq.weight of H₃PO₄? (1)H₃PO₄ + OH^-= H₂PO ₄ + H₂O (2)H₃PO₄+ 2OH^- = HPO₄^2-+ H₂O (3)H₃PO₄ + 3OH^- = PO₄^3- + 3H₂O

Discussion

39.	A gaseous mixture of helium and oxygen is found to have a density of 0.5 g dm−3 at 25 ∘C and 0.662 atm. What is the percentage by mass of helium in this mixture? (Given: R=0.08 L atm mol−1 K−1, 5960331=18)
Answer» A gaseous mixture of helium and oxygen is found to have a density of $0.5 {g dm}^{- 3}$ at $25^{\circ} C$ and $0.662 a t m$ . What is the percentage by mass of helium in this mixture? (Given: $R = 0.08 L a t m m o l^{- 1} K^{- 1}, \frac{5960}{331} = 18$ )

Discussion

40.	Except nitrogen , all the 15 group element is allotropy?what is the meaning of allotropy ??
Answer» Except nitrogen , all the 15 group element is allotropy?what is the meaning of allotropy ??

Discussion

41.	The solution of sulphuric acid contains 80% by weight H2SO4. Specific gravity of this solution is 1.71. Its normality is about. Please Elaborate
Answer» The solution of sulphuric acid contains 80% by weight H2SO4. Specific gravity of this solution is 1.71. Its normality is about. Please Elaborate

Discussion

42.	Analysis shows that FeO has a non-stoichiometric composition with formula Fe0.95O. Give reason.
Answer» Analysis shows that FeO has a non-stoichiometric composition with formula $F e_{0.95}$ O. Give reason.

Discussion

43.	Find the volume strength of H2O2 solution prepared by mixing 250 mL of 3N H2O2 and 750 mL of 1N H2O2 solution:
Answer» Find the volume strength of $H_{2} O_{2}$ solution prepared by mixing $250 mL$ of $3 N H_{2} O_{2}$ and $750 mL$ of $1 N H_{2} O_{2}$ solution:

Discussion

44.	Number of acyclic isomers represented by molecular formula C4H10O are:
Answer» Number of acyclic isomers represented by molecular formula $C_{4} H_{10} O$ are:

Discussion

45.	Which of the following is the strongest base?
Answer» Which of the following is the strongest base?

Discussion

46.	A certain dye absorbs 4700 ∘A and fluoresces at 5080 ∘A, these are being wavelengths of maximum absorption that under given conditions 47% of the absorbed energy is emitted. Calculate the ratio of the number of quanta emitted to the number of quanta absorbed.
Answer» A certain dye absorbs $4700 \circ A$ and fluoresces at $5080 \circ A$ , these are being wavelengths of maximum absorption that under given conditions 47% of the absorbed energy is emitted. Calculate the ratio of the number of quanta emitted to the number of quanta absorbed.

Discussion

47.	In a reaction if the concentration of reactant A is tripled, the rate of reaction becomes twenty seven times. What is the order of the reaction?
Answer» In a reaction if the concentration of reactant A is tripled, the rate of reaction becomes twenty seven times. What is the order of the reaction?

Discussion

48.	Two closed vessel A and B of equal volume containing air at pressure P1 and temperature T1 are connected to each other through a narrow open tube. If the temperature of one is now maintained at T1 and other at T2 (where T1>T2) then that what will be the final pressure?
Answer» Two closed vessel $A$ and $B$ of equal volume containing air at pressure $P_{1}$ and temperature $T_{1}$ are connected to each other through a narrow open tube. If the temperature of one is now maintained at $T_{1}$ and other at $T_{2}$ (where $T_{1} > T_{2}$ ) then that what will be the final pressure?

Discussion

49.	Calculate volume of .4Molar NaOH required to react with following mixture (HCl[1mol] H2SO4 [2mol] ?
Answer» Calculate volume of .4Molar NaOH required to react with following mixture (HCl[1mol] H2SO4 [2mol] ?

Discussion

50.	Give reason which of the followoing will give only 1 monochloroderavative. Neo pentane N hexane 2 methlypentane 3 methylpentane
Answer» Give reason which of the followoing will give only 1 monochloroderavative. Neo pentane N hexane 2 methlypentane 3 methylpentane

50.

Give reason which of the followoing will give only 1 monochloroderavative. Neo pentane N hexane 2 methlypentane 3 methylpentane

Answer»

Give reason which of the followoing will give only 1 monochloroderavative.

Neo pentane

N hexane

2 methlypentane

3 methylpentane

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which one is a Lewis acid

On heating NaNO3, it gives : -

Which of the following compounds shows both Frenkel and Schottky defects:

Which of the following does not have a metal carbon bond?

The reduction potential of hydrogen electrode will be positive if

Which series of reactions will achieve the following transformation?

The compound not isomeric with diethyl ether is

What is the effect of temperature on specific rate of a reaction ?

The major product of the following reaction is:

The correct order of rate of SN2 reactivity of H2O, −OCH3, −OH and CH3COO− is

Which of the following displaces bromine from an aqueous solution of bromide ions?

The radial distribution functions for all orbitals is given by:

Sir/ Madam Whycan't ozone be a reducing agent? The highest oxidation state of oxygen is +2 which is possible when it combines with fluorine. Now then, why can't ozone be a reducing agent? What happens when ozone reacts with fluorine or fluorine containing compound? Please explain in detail.

Which of the following most accurately describes the first step in the reaction of HCl with but-1-ene?

Copper crystallises into a fcc lattice with edge length 3.61×10−8cm. Show that the calculated density is in agreement with its measured value of 8.92 g cm−3

If the threshold wavelength (λo) of a metal is 330 nm, then the work function for the photoelectric emission is:

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 The structure of compound I is

If Z is a compressibility factor, Van der Waals equation at low pressure can be written as

In the given reaction CH3−CH2−Br Na/dry ether−−−−−−−−→ Product; Product will be:

The rate of a first-order reaction is 0.04 mol–1s–1 at 10 seconds and 0.03 mol–1s–1 at 20 seconds after initiation of the reaction. The half-life period of the reaction is

The quantity of charge q coulomb passing through a conductor varies with time tsecond according to the relation q=2t2+8t+1 .The current through the conductor at t=1 s is

De-Broglie wavelength of neutron at 27∘C is λ and its wavelength at 927∘C is nλ, then n is (The kinetic energy of the neutron is due to the thermal energy) [Write upto two places after the decimal]

What needs to be attached to the carbon-carbon double bond to geometric isomers?

A mixture of hydrogen and oxygen at one bar pressure contains 20% by weight of hydrogen. Find the partial pressure of hydrogen.

Which of the following species has the negative electron gain enthalpy?

The standard potential is given below, of the following at 25∘C. MnO2→Mn3+ E∘=0.95V Mn+3→Mn2+ E∘=1.51V The standard potential of MnO2→Mn2+ is :

The second line of Lyman series of H coincides with the 6th line of Paschen series of an Ionic species X. The atomic number Z for X is

Which of the following is a non-aromatic compound?

The 5 age group element which exhibit wide range of oxidation States is

Which of the following statements about overlap integrals of the various orbital is true - 1)2p&gt;2s&gt;2sp^3&gt;2sp^2&gt;2sp 2)2p&gt;2sp^3&gt;2sp^2&gt;2sp&gt;2s 3)2p&gt;2sp&gt;2sp^2&gt;2sp^3&gt;2s 4)2sp^3&gt;2sp^2&gt;2sp&gt;2p&gt;2s

What is 5 litres of a solution in m3 ?

Pb3O4+A→2Pb(NO3)2+PbO2+H2

Match the following: 1) i)FCC 2) ii) BCC 3) iii) Primitive

Explain isomerism in coordination compounds with examples?

In given reactions what are the eq.weight of H3PO4? (1)H3PO4 + OH- = H2PO 4 + H2O (2)H3PO4 + 2OH- = HPO42-+ H2O (3)H3PO4 + 3OH- = PO43- + 3H2O

A gaseous mixture of helium and oxygen is found to have a density of 0.5 g dm−3 at 25 ∘C and 0.662 atm. What is the percentage by mass of helium in this mixture? (Given: R=0.08 L atm mol−1 K−1, 5960331=18)

Except nitrogen , all the 15 group element is allotropy?what is the meaning of allotropy ??

The solution of sulphuric acid contains 80% by weight H2SO4. Specific gravity of this solution is 1.71. Its normality is about. Please Elaborate

Analysis shows that FeO has a non-stoichiometric composition with formula Fe0.95O. Give reason.

Find the volume strength of H2O2 solution prepared by mixing 250 mL of 3N H2O2 and 750 mL of 1N H2O2 solution:

Number of acyclic isomers represented by molecular formula C4H10O are:

Which of the following is the strongest base?

A certain dye absorbs 4700 ∘A and fluoresces at 5080 ∘A, these are being wavelengths of maximum absorption that under given conditions 47% of the absorbed energy is emitted. Calculate the ratio of the number of quanta emitted to the number of quanta absorbed.

In a reaction if the concentration of reactant A is tripled, the rate of reaction becomes twenty seven times. What is the order of the reaction?

Two closed vessel A and B of equal volume containing air at pressure P1 and temperature T1 are connected to each other through a narrow open tube. If the temperature of one is now maintained at T1 and other at T2 (where T1&gt;T2) then that what will be the final pressure?

Calculate volume of .4Molar NaOH required to react with following mixture (HCl[1mol] H2SO4 [2mol] ?

Give reason which of the followoing will give only 1 monochloroderavative. Neo pentane N hexane 2 methlypentane 3 methylpentane

Which of the following statements about overlap integrals of the various orbital is true - 1)2p>2s>2sp^3>2sp^2>2sp 2)2p>2sp^3>2sp^2>2sp>2s 3)2p>2sp>2sp^2>2sp^3>2s 4)2sp^3>2sp^2>2sp>2p>2s

Two closed vessel A and B of equal volume containing air at pressure P1 and temperature T1 are connected to each other through a narrow open tube. If the temperature of one is now maintained at T1 and other at T2 (where T1>T2) then that what will be the final pressure?