46295 + Interview Questions in Chemistry

1.	The density of the atmosphere at sea level is 1.29 kg/m3 and g =9.8 m/s2 Assume that both do not change with altitude, how high should the atmosphere extend?
Answer» The density of the atmosphere at sea level is 1.29 kg/m3 and g =9.8 m/s2 Assume that both do not change with altitude, how high should the atmosphere extend?

Discussion

2.	If the E∘cell for a given reaction has a negative value, which of the following gives the correct relationships for the values of ΔG∘ and Keq ?
Answer» If the $E_{c e l l}^{\circ}$ for a given reaction has a negative value, which of the following gives the correct relationships for the values of $Δ G^{\circ}$ and $K_{e q}$ ?

Discussion

3.	What are the various important formulae for differentiation? Explain all the formulae briefly
Answer» What are the various important formulae for differentiation? Explain all the formulae briefly

Discussion

4.	H2 + S ⇌ H2S + EnergyWhat would shift the equilibrium to the right?
Answer» H₂ + S ⇌ H₂S + Energy What would shift the equilibrium to the right?

Discussion

5.	The number of moles of KMnO4 reduced one mole of KI in alkaline medium.
Answer» The number of moles of $K M n O_{4}$ reduced one mole of KI in alkaline medium.

Discussion

6.	The equilibrium constant for the reaction 2SO3 (g) ⇌ 2SO2 (g) + O2 (g) is 0.3 atm at 1000 K. One mole of SO2 and two moles of O2 are placed in a vessel that is maintained at a pressure of 4 atm. How much SO3 is present at equilibrium?
Answer» The equilibrium constant for the reaction $2 S O_{3}$ (g) $⇌$ $2 S O_{2}$ (g) + $O_{2}$ (g) is 0.3 atm at 1000 K. One mole of $S O_{2}$ and two moles of $O_{2}$ are placed in a vessel that is maintained at a pressure of 4 atm. How much $S O_{3}$ is present at equilibrium?

Discussion

7.	A spherical vessel of radius r = 5 cm contains hydrogen (H2) at a temperature T = 300K and pressure P = 105 Pa. How many molecules collide on the vessel in 1 s.
Answer» A spherical vessel of radius r = 5 cm contains hydrogen $(H_{2})$ at a temperature T = 300K and pressure P = 105 Pa. How many molecules collide on the vessel in 1 s.

Discussion

8.	If we consider 1 and 2 as priority then which of the following is E?
Answer» If we consider 1 and 2 as priority then which of the following is E?

Discussion

9.	35. 1/(x+4)-1/(x-7)=11/30 ,x is not equals to -4,7.
Answer» 35. 1/(x+4)-1/(x-7)=11/30 ,x is not equals to -4,7.

Discussion

10.	Nitration is an example of aromatic electrophilic substitution and its rate depends upon the group already present in the benzene ring. Out of benzene and phenol, which one is more easily nitrated and why?
Answer» Nitration is an example of aromatic electrophilic substitution and its rate depends upon the group already present in the benzene ring. Out of benzene and phenol, which one is more easily nitrated and why?

Discussion

11.	two particle of exceuting shm of same amplitude of 20cm with same period along the same line about same equillibrium position the max dis†an ce between the two is 20cm .their phase difference is
Answer» two particle of exceuting shm of same amplitude of 20cm with same period along the same line about same equillibrium position the max dis†an ce between the two is 20cm .their phase difference is

Discussion

12.	Boron form covalent compound due to
Answer» Boron form covalent compound due to

12.

Boron form covalent compound due to

Answer»

Boron form covalent compound due to

Discussion

13.	quredCalculate the threshold requency of the metal from which the photoelectrons are emitted withzero velocity when exposed to radiation of wavelength 6800 A.
Answer» quredCalculate the threshold requency of the metal from which the photoelectrons are emitted withzero velocity when exposed to radiation of wavelength 6800 A.

Discussion

14.	Conductivity (unit Siemen's) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is [AIEEE 2002]
Answer» Conductivity (unit Siemen's) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is [AIEEE 2002]

14.

Conductivity (unit Siemen's) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is [AIEEE 2002]

Answer»

Conductivity (unit Siemen's) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is

[AIEEE 2002]

Discussion

15.	Calculate the mass of NaOH flakes that can be completely neutralized by 200ml 0.8N H2SO4.
Answer» Calculate the mass of NaOH flakes that can be completely neutralized by 200ml 0.8N H2SO4.

Discussion

16.	Thethree states of matter are solid, liquid and gas. Which of the followingstatement is/are true about them[AIIMS 1991]
Answer» The three states of matter are solid, liquid and gas. Which of the following statement is/are true about them [AIIMS 1991]

16.

Thethree states of matter are solid, liquid and gas. Which of the followingstatement is/are true about them[AIIMS 1991]

Answer»

The
three states of matter are solid, liquid and gas. Which of the following
statement is/are true about them

[AIIMS 1991]

Discussion

17.	Which of the following species is the weakest Lewis acid?
Answer» Which of the following species is the weakest Lewis acid?

Discussion

18.	74.5 g of metal chloride contains 35.5 g of chlorine. The equivalent weight of metal is 1) 74.5 (3) 35.5 (2) 39 (4) 7.45
Answer» 74.5 g of metal chloride contains 35.5 g of chlorine. The equivalent weight of metal is 1) 74.5 (3) 35.5 (2) 39 (4) 7.45

Discussion

19.	The crystalline solids are:
Answer» The crystalline solids are:

Discussion

20.	25. If 2 moles of A and 3 moles of B are mixed to form an ideal solution vapour pressure of A and B are 120 and 180 mm of Hg respectively, then the composition of A and B in the vapour phase when the first traces of vapour are formed in the above case is
Answer» 25. If 2 moles of A and 3 moles of B are mixed to form an ideal solution vapour pressure of A and B are 120 and 180 mm of Hg respectively, then the composition of A and B in the vapour phase when the first traces of vapour are formed in the above case is

Discussion

21.	For 2SO2 + O2 2SO3 Initial moles of of SO2 and O2 are 8 and 4 respectively.If degree of dissociation of SO2 is 50% then find degree of dissociation of O2 and mole fraction of SO3 at equilibrium.
Answer» For 2SO2 + O2 <> 2SO3 Initial moles of of SO2 and O2 are 8 and 4 respectively.If degree of dissociation of SO2 is 50% then find degree of dissociation of O2 and mole fraction of SO3 at equilibrium.

Discussion

22.	Carbon monoxide is allowed to expand isothermally and reversibly from 15 m3 to 30 m3 at 300 K and work obtained is 8.595 kJ. Calculate the number of moles of carbon monoxide. Take R = 8.3 J K−1mol−1 and ln2 = 0.69
Answer» Carbon monoxide is allowed to expand isothermally and reversibly from $15 m^{3} t o 30 m^{3}$ at $300 K$ and work obtained is $8.595 k J$ . Calculate the number of moles of carbon monoxide. Take R = 8.3 $J K^{- 1} m o l^{- 1}$ and ln2 = 0.69

Discussion

23.	If n = 6 , the correct sequence for filling of electrons will be
Answer» If n = 6 , the correct sequence for filling of electrons will be

Discussion

24.	Calculate the energy associated with the first orbit of He⊕. What is the radius of orbit?
Answer» Calculate the energy associated with the first orbit of $H e^{\oplus}$ . What is the radius of orbit?

Discussion

25.	4 How many chain isomers could be obtained from the alkane C6H14 1)4 2)5 3)6 4)7
Answer» 4 How many chain isomers could be obtained from the alkane C6H14 1)4 2)5 3)6 4)7

Discussion

26.	When 32.25g of ethyl chloride is subjected to de-hydro halogenation reaction, the yield is 50% . The mass of the product formed is (atomic mass of chlorine in 35.5)
Answer» When 32.25g of ethyl chloride is subjected to de-hydro halogenation reaction, the yield is $50 %$ . The mass of the product formed is (atomic mass of chlorine in 35.5)

Discussion

27.	1.82 g of a metal requires 32.5 ml of 1 N HCL to dissolve it. What is the equivalent weight of metal?
Answer» 1.82 g of a metal requires 32.5 ml of 1 N HCL to dissolve it. What is the equivalent weight of metal?

Discussion

28.	Is cyclobutadiene aromatic or anti aromatic?
Answer» Is cyclobutadiene aromatic or anti aromatic?

Discussion

29.	From the list of given metals, which is the most ductile metal?
Answer» From the list of given metals, which is the most ductile metal?

Discussion

30.	The rate of reaction doubles when its temperature changes from 300K to 310 K .activation energy of such a reaction will be (R=8.314 kj/ mol and WG2= 0.031 )
Answer» The rate of reaction doubles when its temperature changes from 300K to 310 K .activation energy of such a reaction will be (R=8.314 kj/ mol and WG2= 0.031 )

Discussion

31.	define formula mass
Answer» define formula mass

Discussion

32.	The number of stereoisomers possible for the given compound is:
Answer» The number of stereoisomers possible for the given compound is:

Discussion

33.	First three nearest neighbour distances for face centered cubic lattice are
Answer» First three nearest neighbour distances for face centered cubic lattice are

Discussion

34.	Ethanoic acid was added to sodium hydrogen-carbonate solution and the gas evolved was tested with a burning splinter. The following four observations were reported:(a) The gas burns with the pop sound and the flame gets extinguished.(b) The gas does not burn but the splinter burns with a pop sound.(c) The flame extinguishes and the gas does not burn.(d) The gas burns with a blue flame and the splinter burns brightly.The correct observation is reported in :(1) (a)(2) (b)(3) (c)(4) (d)
Answer» Ethanoic acid was added to sodium hydrogen-carbonate solution and the gas evolved was tested with a burning splinter. The following four observations were reported: (a) The gas burns with the pop sound and the flame gets extinguished. (b) The gas does not burn but the splinter burns with a pop sound. (c) The flame extinguishes and the gas does not burn. (d) The gas burns with a blue flame and the splinter burns brightly. The correct observation is reported in : (1) (a) (2) (b) (3) (c) (4) (d)

Discussion

35.	8. We know when PCl5 undergoes hydrolysis it forms POCl3 which further hydrolys to give H3PO4. Then why PCl5 on reaction with D2O doesn't form D2PO4
Answer» 8. We know when PCl5 undergoes hydrolysis it forms POCl3 which further hydrolys to give H3PO4. Then why PCl5 on reaction with D2O doesn't form D2PO4

Discussion

36.	Arrange the following compounds in their increasing order of reactivity towards CH3ONa.
Answer» Arrange the following compounds in their increasing order of reactivity towards $C H_{3} O N a$ .

Discussion

37.	33.A: Cyclic silicates and chain silicates have the same general molecular formula. R: In cyclic silicates, three corners of each SiO4 tetrahedron are shared while in chain silicates only two are shared with other tetrahedra.
Answer» 33.A: Cyclic silicates and chain silicates have the same general molecular formula. R: In cyclic silicates, three corners of each SiO4 tetrahedron are shared while in chain silicates only two are shared with other tetrahedra.

Discussion

38.	32.What happens when 2-methylcyclohexanone reacts with CH3I in presence of LDA/THF?{with mechanism}.
Answer» 32.What happens when 2-methylcyclohexanone reacts with CH3I in presence of LDA/THF?{with mechanism}.

Discussion

39.	Writethe structures of the following compounds.(i)α-Methoxypropionaldehyde(ii)3-Hydroxybutanal(iii)2-Hydroxycyclopentanecarbaldehyde(iv)4-Oxopentanal(v)Di-sec-butylketone(vi)4-Fluoroacetophenone
Answer» Write the structures of the following compounds. (i) α-Methoxypropionaldehyde (ii) 3-Hydroxybutanal (iii) 2-Hydroxycyclopentane carbaldehyde (iv) 4-Oxopentanal (v) Di-sec-butyl ketone (vi) 4-Fluoroacetophenone

39.

Writethe structures of the following compounds.(i)α-Methoxypropionaldehyde(ii)3-Hydroxybutanal(iii)2-Hydroxycyclopentanecarbaldehyde(iv)4-Oxopentanal(v)Di-sec-butylketone(vi)4-Fluoroacetophenone

Answer»

Write
the structures of the following compounds.

(i)
α-Methoxypropionaldehyde

(ii)
3-Hydroxybutanal

(iii)
2-Hydroxycyclopentane
carbaldehyde

(iv)
4-Oxopentanal

(v)
Di-sec-butyl
ketone

(vi)
4-Fluoroacetophenone

Discussion

40.	Facial and meridional isomerism will be exhibited by:
Answer» Facial and meridional isomerism will be exhibited by:

Discussion

41.	Among the following compounds, polar covalent bond is present in:
Answer» Among the following compounds, polar covalent bond is present in:

Discussion

42.	One of the following conversion results in the change of hybridization and geometry
Answer» One of the following conversion results in the change of hybridization and geometry

Discussion

43.	Calculate oxidation state of Ag in Ag[(S2O3)2]3− molecule
Answer» Calculate oxidation state of $A g$ in $A g [(S_{2} O_{3})_{2}]^{3 -}$ molecule

Discussion

44.	Derive the force of interaction in dipole dipole interaction with detailed explanation of diagram
Answer» Derive the force of interaction in dipole dipole interaction with detailed explanation of diagram

Discussion

45.	Phenol on treatment with CO2 in the presence of NaOH followed by acidification produces compound X as the major product. X on treatement with(CH3CO)2O in the presence of a catalytic amount of H2SO4 produces:
Answer» Phenol on treatment with $C O_{2}$ in the presence of NaOH followed by acidification produces compound X as the major product. X on treatement with $(C H_{3} C O)_{2} O$ in the presence of a catalytic amount of $H_{2} S O_{4}$ produces:

Discussion

46.	Which compound would give only oxalaldehyde (ethanedial) upon ozonolysis?
Answer» Which compound would give only oxalaldehyde (ethanedial) upon ozonolysis?

Discussion

47.	If α is the degree of dissociation of Na2SO4, the van't Hoff factor ,i , used for calculating the molecular mass is
Answer» If α is the degree of dissociation of Na₂SO₄, the van't Hoff factor ,i , used for calculating the molecular mass is

Discussion

48.	{Br(CH}}_2{)}}_{4 }{COCH}}_3\overset{(i)Mg/ether }{\underset{(ii)H_3 O^+}{→ }}X; Identify the compound X.
Answer» {Br(CH}}_2{)}}_{4 }{COCH}}_3\overset{(i)Mg/ether }{\underset{(ii)H_3 O^+}{→ }}X; Identify the compound X.

Discussion

49.	1 gm mixture of caco3 and nacl reacts completely with 120 ml of 0.1 N hcl. Then the percentage of nacl is? PL also give the relation between mole fraction of solute and molality of solution. Thanx.
Answer» 1 gm mixture of caco3 and nacl reacts completely with 120 ml of 0.1 N hcl. Then the percentage of nacl is? PL also give the relation between mole fraction of solute and molality of solution. Thanx.

Discussion

50.	The unit cel of diamond is made up of
Answer» The unit cel of diamond is made up of

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The density of the atmosphere at sea level is 1.29 kg/m3 and g =9.8 m/s2 Assume that both do not change with altitude, how high should the atmosphere extend?

If the E∘cell for a given reaction has a negative value, which of the following gives the correct relationships for the values of ΔG∘ and Keq ?

What are the various important formulae for differentiation? Explain all the formulae briefly

H2 + S ⇌ H2S + EnergyWhat would shift the equilibrium to the right?

The number of moles of KMnO4 reduced one mole of KI in alkaline medium.

The equilibrium constant for the reaction 2SO3 (g) ⇌ 2SO2 (g) + O2 (g) is 0.3 atm at 1000 K. One mole of SO2 and two moles of O2 are placed in a vessel that is maintained at a pressure of 4 atm. How much SO3 is present at equilibrium?

A spherical vessel of radius r = 5 cm contains hydrogen (H2) at a temperature T = 300K and pressure P = 105 Pa. How many molecules collide on the vessel in 1 s.

If we consider 1 and 2 as priority then which of the following is E?

35. 1/(x+4)-1/(x-7)=11/30 ,x is not equals to -4,7.

Nitration is an example of aromatic electrophilic substitution and its rate depends upon the group already present in the benzene ring. Out of benzene and phenol, which one is more easily nitrated and why?

two particle of exceuting shm of same amplitude of 20cm with same period along the same line about same equillibrium position the max dis†an ce between the two is 20cm .their phase difference is

Boron form covalent compound due to

quredCalculate the threshold requency of the metal from which the photoelectrons are emitted withzero velocity when exposed to radiation of wavelength 6800 A.

Conductivity (unit Siemen's) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is [AIEEE 2002]

Calculate the mass of NaOH flakes that can be completely neutralized by 200ml 0.8N H2SO4.

Thethree states of matter are solid, liquid and gas. Which of the followingstatement is/are true about them[AIIMS 1991]

Which of the following species is the weakest Lewis acid?

74.5 g of metal chloride contains 35.5 g of chlorine. The equivalent weight of metal is 1) 74.5 (3) 35.5 (2) 39 (4) 7.45

The crystalline solids are:

25. If 2 moles of A and 3 moles of B are mixed to form an ideal solution vapour pressure of A and B are 120 and 180 mm of Hg respectively, then the composition of A and B in the vapour phase when the first traces of vapour are formed in the above case is

For 2SO2 + O2 2SO3 Initial moles of of SO2 and O2 are 8 and 4 respectively.If degree of dissociation of SO2 is 50% then find degree of dissociation of O2 and mole fraction of SO3 at equilibrium.

Carbon monoxide is allowed to expand isothermally and reversibly from 15 m3 to 30 m3 at 300 K and work obtained is 8.595 kJ. Calculate the number of moles of carbon monoxide. Take R = 8.3 J K−1mol−1 and ln2 = 0.69

If n = 6 , the correct sequence for filling of electrons will be

Calculate the energy associated with the first orbit of He⊕. What is the radius of orbit?

4 How many chain isomers could be obtained from the alkane C6H14 1)4 2)5 3)6 4)7

When 32.25g of ethyl chloride is subjected to de-hydro halogenation reaction, the yield is 50% . The mass of the product formed is (atomic mass of chlorine in 35.5)

1.82 g of a metal requires 32.5 ml of 1 N HCL to dissolve it. What is the equivalent weight of metal?

Is cyclobutadiene aromatic or anti aromatic?

From the list of given metals, which is the most ductile metal?

The rate of reaction doubles when its temperature changes from 300K to 310 K .activation energy of such a reaction will be (R=8.314 kj/ mol and WG2= 0.031 )

define formula mass

The number of stereoisomers possible for the given compound is:

First three nearest neighbour distances for face centered cubic lattice are

8. We know when PCl5 undergoes hydrolysis it forms POCl3 which further hydrolys to give H3PO4. Then why PCl5 on reaction with D2O doesn't form D2PO4

Arrange the following compounds in their increasing order of reactivity towards CH3ONa.

33.A: Cyclic silicates and chain silicates have the same general molecular formula. R: In cyclic silicates, three corners of each SiO4 tetrahedron are shared while in chain silicates only two are shared with other tetrahedra.

32.What happens when 2-methylcyclohexanone reacts with CH3I in presence of LDA/THF?{with mechanism}.

Writethe structures of the following compounds.(i)α-Methoxypropionaldehyde(ii)3-Hydroxybutanal(iii)2-Hydroxycyclopentanecarbaldehyde(iv)4-Oxopentanal(v)Di-sec-butylketone(vi)4-Fluoroacetophenone

Facial and meridional isomerism will be exhibited by:

Among the following compounds, polar covalent bond is present in:

One of the following conversion results in the change of hybridization and geometry

Calculate oxidation state of Ag in Ag[(S2O3)2]3− molecule

Derive the force of interaction in dipole dipole interaction with detailed explanation of diagram

Phenol on treatment with CO2 in the presence of NaOH followed by acidification produces compound X as the major product. X on treatement with(CH3CO)2O in the presence of a catalytic amount of H2SO4 produces:

Which compound would give only oxalaldehyde (ethanedial) upon ozonolysis?

If α is the degree of dissociation of Na2SO4, the van't Hoff factor ,i , used for calculating the molecular mass is

{Br(CH}}_2{)}}_{4 }{COCH}}_3\overset{(i)Mg/ether }{\underset{(ii)H_3 O^+}{→ }}X; Identify the compound X.

1 gm mixture of caco3 and nacl reacts completely with 120 ml of 0.1 N hcl. Then the percentage of nacl is? PL also give the relation between mole fraction of solute and molality of solution. Thanx.

The unit cel of diamond is made up of