46295 + Interview Questions in Chemistry

1.	Find the major product 'B' in the above reaction.
Answer» Find the major product 'B' in the above reaction.

Discussion

2.	The number of close neighbour in a facecentred cubic lattice of identical sphere is
Answer» The number of close neighbour in a face centred cubic lattice of identical sphere is

Discussion

3.	Towards catayltic hydrogenation,the least reactive compound is 1) CH2=CH2 2)CH3-CH=CH2 3)H3C-CH=CH-CH3 4)(CH3)2 C=C(CH3)2
Answer» Towards catayltic hydrogenation,the least reactive compound is 1) CH2=CH2 2)CH3-CH=CH2 3)H3C-CH=CH-CH3 4)(CH3)2 C=C(CH3)2

Discussion

4.	15. 5L of a gaseous mixture of ethane and propane are burnt to produce total 11L of CO2 .volume of C2H6 in initial mixture
Answer» 15. 5L of a gaseous mixture of ethane and propane are burnt to produce total 11L of CO2 .volume of C2H6 in initial mixture

Discussion

5.	Which of the following can have meso form?
Answer» Which of the following can have meso form?

Discussion

6.	37.Minimum de-Broglie wavelength is associated with? (1) electron (2)proton (3)CO2 (4)SO2
Answer» 37.Minimum de-Broglie wavelength is associated with? (1) electron (2)proton (3)CO2 (4)SO2

Discussion

7.	Arrange the following as directed:(a) Increasing order of basic strength:Aniline, p – nitroaniline and p – toluidine.(b) Decreasing order of basic strength in gas phase:C2H5NH2, (C2H5)2NH, (C2H5)3N and NH3.(c) Increasing order of solubility in water:C6H5NH2, (C2H5)2NH, C2H5NH2.
Answer» Arrange the following as directed: (a) Increasing order of basic strength: Aniline, p – nitroaniline and p – toluidine. (b) Decreasing order of basic strength in gas phase: C2H5NH2, (C2H5)2NH, (C2H5)3N and NH3. (c) Increasing order of solubility in water: C6H5NH2, (C2H5)2NH, C2H5NH2.

Discussion

8.	Naphthalene, a white solid used to make mothballs, has a vapour pressure of 0.10 mm Hg at 27oC. Kp (in atm) and Kc for the equilibrium are : C10H8(s)⇌C10H8(g)
Answer» Naphthalene, a white solid used to make mothballs, has a vapour pressure of $0.10 m m H g$ at $27^{o} C$ . $K_{p}$ (in atm) and $K_{c}$ for the equilibrium are : $C_{10} H_{8} (s) ⇌ C_{10} H_{8} (g)$

Discussion

9.	How is SO2 an air pollutant?
Answer» How is SO₂ an air pollutant?

Discussion

10.	20. Gold crystallises in an fcc lattice. If the edge length of unit cell of gold is 350 pm, the radius of gold atom will be
Answer» 20. Gold crystallises in an fcc lattice. If the edge length of unit cell of gold is 350 pm, the radius of gold atom will be

Discussion

11.	2 16. The electron in the hydrogen at excited state (n 3) to its ground s and the photons thus emitted at hotosensitive material. If the wor to its ground state (n=1 state ro in a let the 121 function d s 5.1 ev, the stoppingpotential i estimated to be (the energy of the electron h state En-13.6eV) (1) 5.1 V (2) 12.1 V (3) 17.2 V (4) 7 V 13.6 v [AIPMT (Mains) 2010 17.
Answer» 2 16. The electron in the hydrogen at excited state (n 3) to its ground s and the photons thus emitted at hotosensitive material. If the wor to its ground state (n=1 state ro in a let the 121 function d s 5.1 ev, the stoppingpotential i estimated to be (the energy of the electron h state En-13.6eV) (1) 5.1 V (2) 12.1 V (3) 17.2 V (4) 7 V 13.6 v [AIPMT (Mains) 2010 17.

Discussion

12.	What are the possible distances between 2 octahedral voids in FCC lattice?
Answer» What are the possible distances between 2 octahedral voids in FCC lattice?

Discussion

13.	Hybridization state of the central atom in HgCl2 is ?
Answer» Hybridization state of the central atom in HgCl2 is ?

Discussion

14.	What is the product when 2-Methyl-prop-1-ene is reacted with bromine water?
Answer» What is the product when 2-Methyl-prop-1-ene is reacted with bromine water?

Discussion

15.	31. Which of the following organic compounds has same hybridization as its combustion products 1.Ethane 2.Ethyne 3.Ethene 4.Ethanol
Answer» 31. Which of the following organic compounds has same hybridization as its combustion products 1.Ethane 2.Ethyne 3.Ethene 4.Ethanol

Discussion

16.	The equivalent weight of metal whose 1g carbonate on heating gives 0.6 of metal oxide, i
Answer» The equivalent weight of metal whose 1g carbonate on heating gives 0.6 of metal oxide, i

Discussion

17.	The correct statement regarding F - centre is
Answer» The correct statement regarding F - centre is

Discussion

18.	Consider the following relations for emf of an electrochemical cell:(i) EMF of cell = (Oxidation potential of anode) – (Reduction potential of cathode)(ii) EMF of cell = (Oxidation potential of anode) + (Reduction potential of cathode)(iii)) EMF of cell = (Reductional potential of anode) + (Reduction potential of cathode)(iv) ) EMF of cell = (Oxidation potential of anode) – (Oxidation potential of cathode)
Answer» Consider the following relations for emf of an electrochemical cell: $(i) EMF of cell = (Oxidation potential of anode) - (Reduction potential of cathode) (ii) EMF of cell = (Oxidation potential of anode) + (Reduction potential of cathode) (iii)) EMF of cell = (Reductional potential of anode) + (Reduction potential of cathode) (i v)) EMF of cell = (Oxidation potential of anode) - (Oxidation potential of cathode)$

Discussion

19.	Geometrical isomerism is shown by:
Answer» Geometrical isomerism is shown by:

Discussion

20.	160) C6H5CONHCH3 can be converted into C6H5CH2NHCH3 by 1) NaBH4 2) H2-Pd/C 3) LiAlH4 4) Zn-Hg/HC
Answer» 160) C6H5CONHCH3 can be converted into C6H5CH2NHCH3 by 1) NaBH4 2) H2-Pd/C 3) LiAlH4 4) Zn-Hg/HC

Discussion

21.	A large flask fitted with a stop-cock is evacuated and weighed; its mass is found to be 134.567g . It is then filled to a pressure of 735mm at 31^†extdegree C with a gas of unknown molecular mass and then reweighed; its mass is 137.456g. The flask is then filled with water and weighed again ; its mass is now 1067.9g . Assuming that the gas is ideal , calculate the molar mass of the gas.
Answer» A large flask fitted with a stop-cock is evacuated and weighed; its mass is found to be 134.567g . It is then filled to a pressure of 735mm at 31^†extdegree C with a gas of unknown molecular mass and then reweighed; its mass is 137.456g. The flask is then filled with water and weighed again ; its mass is now 1067.9g . Assuming that the gas is ideal , calculate the molar mass of the gas.

Discussion

22.	For the reaction 2NO + Br2 ------> 2NOBr Mechanism given is NO +Br2 <------> NOBr, (fast) NOBr2 + NO ------> 2NOBr (slow) Then which of the following is true? (1) Order of the above reaction is less than molecularity of reaction (2) Order of the above reaction is equal to molecularity of reaction (3) Order is greater than molecularity of reaction (4) Relation between order and molecularity cannot be predicted
Answer» For the reaction 2NO + Br2 ------> 2NOBr Mechanism given is NO +Br2 <------> NOBr, (fast) NOBr2 + NO ------> 2NOBr (slow) Then which of the following is true? (1) Order of the above reaction is less than molecularity of reaction (2) Order of the above reaction is equal to molecularity of reaction (3) Order is greater than molecularity of reaction (4) Relation between order and molecularity cannot be predicted

Discussion

23.	An acidified solution of 0.05 M Zn2+ is saturated with 0.1 M H2S. What is the minimum molar concentration (M) of H+ required to prevent the precipitation of ZnS?Use KSP(ZnS)=1.25×10−22 and overall dissociation constant of H2S.KNET=K1K2=1×10−21
Answer» An acidified solution of $0.05 M Z n^{2 +}$ is saturated with $0.1 M H_{2} S$ . What is the minimum molar concentration $(M)$ of $H^{+}$ required to prevent the precipitation of $Z n S$ ? Use $K_{S P} (Z n S) = 1.25 \times 10^{- 22}$ and overall dissociation constant of $H_{2} S$ . $K_{N E T} = K_{1} K_{2} = 1 \times 10^{- 21}$

Discussion

24.	The following is a partial redox equation:MnO−4+8H++xe−⟶Mn2++4H2OThe value of the coefficient 'x' is:
Answer» The following is a partial redox equation: $M n O_{4}^{-} + 8 H^{+} + x e^{-} ⟶ M n^{2 +} + 4 H_{2} O$ The value of the coefficient 'x' is:

Discussion

25.	35. The rate of reaction is triple when temperature changes from 20^° C to 50^° C calculate the energy of activation
Answer» 35. The rate of reaction is triple when temperature changes from 20^° C to 50^° C calculate the energy of activation

Discussion

26.	A Galvanic cell is composed of two hydrogen electrodes, one of which is a standard one. In which of the following solutions should the other electrode be immersed to get maximum emf.
Answer» A Galvanic cell is composed of two hydrogen electrodes, one of which is a standard one. In which of the following solutions should the other electrode be immersed to get maximum emf.

Discussion

27.	49. Difference between zero order reaction and pseudo zero order reaction .
Answer» 49. Difference between zero order reaction and pseudo zero order reaction .

Discussion

28.	Why does an electron not fall in the nucleus?
Answer» Why does an electron not fall in the nucleus?

Discussion

29.	....... is the by-product obtained in the Serpeck's process -
Answer» ....... is the by-product obtained in the Serpeck's process -

Discussion

30.	What is a Ficin ? And what is its function ? Explain in detail.
Answer» What is a Ficin ? And what is its function ? Explain in detail.

Discussion

31.	The area enclosed by y2=4x and line y=mx is equal to 2 then the value of m is
Answer» The area enclosed by $y^{2} = 4 x$ and line $y = m x$ is equal to $2$ then the value of $m$ is

Discussion

32.	Carry out the following reactions:-a)benzene to m-bromonitrobenzene b)acetylene to but-1-yne c)ethane to ethanoic acidm
Answer» Carry out the following reactions:-a)benzene to m-bromonitrobenzene b)acetylene to but-1-yne c)ethane to ethanoic acidm

Discussion

33.	What are isotopes
Answer» What are isotopes

Discussion

34.	The size of iso electronic species F− , Ne and Na+ is affected by
Answer» The size of iso electronic species $F^{-}$ , $N e$ and $N a^{+}$ is affected by

Discussion

35.	Why isnt the half life of zero order reactions infinite?
Answer» Why isnt the half life of zero order reactions infinite?

Discussion

36.	Two bulbs ‘A’ and ‘B’ emit red light and yellow light at 8000 Å and 4000 Å respectively. The number of photons emitted by both the bulbs per second is the same. If the red bulb is labelled as 100 watts, find the wattage of the yellow bulb.
Answer» Two bulbs ‘A’ and ‘B’ emit red light and yellow light at $8000 Å$ and $4000 Å$ respectively. The number of photons emitted by both the bulbs per second is the same. If the red bulb is labelled as $100$ watts, find the wattage of the yellow bulb.

Discussion

37.	How many isomeric dienes with a six membered ring are possible of the compound with the molecular formula C7H10, while two consecutive double bonds are not possible in six membered ring?
Answer» How many isomeric dienes with a six membered ring are possible of the compound with the molecular formula $C_{7} H_{10}$ , while two consecutive double bonds are not possible in six membered ring?

Discussion

38.	What is NAND and AND gate?
Answer» What is NAND and AND gate?

Discussion

39.	A decapeptide (Mol. Wt. 796) on complete hydrolysis gives glycine (Mol. Wt. 75), alanine and phenylalanine. Glycine contributes 47.0% to the total weight of the hydrolysed products. The number of glycine units present in the decapeptide is ___
Answer» A decapeptide (Mol. Wt. 796) on complete hydrolysis gives glycine (Mol. Wt. 75), alanine and phenylalanine. Glycine contributes $47.0 %$ to the total weight of the hydrolysed products. The number of glycine units present in the decapeptide is ___

Discussion

40.	4. With 63 gm of oxalic acid how many litres of N/10 solution can be preoared (1) 100 litre (2) 10 litre (3) 1 litre (4) 1000 litre
Answer» 4. With 63 gm of oxalic acid how many litres of N/10 solution can be preoared (1) 100 litre (2) 10 litre (3) 1 litre (4) 1000 litre

Discussion

41.	(i) An atomic orbital has n = 3. What are the possible values of l and ml ? (ii) List the quantum numbers (ml and l) of electrons for 3d orbital. (iii) Which of the following orbitals are possible? 1p, 2s, 2p and 3f
Answer» (i) An atomic orbital has n = 3. What are the possible values of l and m_l ? (ii) List the quantum numbers (m_l and l) of electrons for 3d orbital. (iii) Which of the following orbitals are possible? 1p, 2s, 2p and 3f

41.

(i) An atomic orbital has n = 3. What are the possible values of l and ml ? (ii) List the quantum numbers (ml and l) of electrons for 3d orbital. (iii) Which of the following orbitals are possible? 1p, 2s, 2p and 3f

Answer»

(i) An atomic orbital has n = 3. What are the possible values of l and m_l ?

(ii) List the quantum numbers (m_l and l) of electrons for 3d orbital.

(iii) Which of the following orbitals are possible?

1p, 2s, 2p and 3f

Discussion

42.	Why are crystalline solids anisotropic
Answer» Why are crystalline solids anisotropic

Discussion

43.	ntwhy are tertiary amines recemic mixture?n
Answer» ntwhy are tertiary amines recemic mixture?n

Discussion

44.	Dites vrai ou faux.1. En été, il fait beau.2. En hiver, il fait nuit tard.3. En automne, il pleut.4. La neige tombe en été.5. Il fait chaud au mois de juin en Inde.
Answer» Dites vrai ou faux. 1. En été, il fait beau. 2. En hiver, il fait nuit tard. 3. En automne, il pleut. 4. La neige tombe en été. 5. Il fait chaud au mois de juin en Inde.

Discussion

45.	Two water taps together can fill a tank in 75/8 hrs. The tap of larger diameter takes 10 hours less than the smaller one to fill the tank separately. Find the time in which each tap can separately fill the tank.
Answer» Two water taps together can fill a tank in 75/8 hrs. The tap of larger diameter takes 10 hours less than the smaller one to fill the tank separately. Find the time in which each tap can separately fill the tank.

Discussion

46.	The instantaneous magnetic flux associated with a closed loop of resistance 10 Ω is given by, ϕ=6t2−5t+1, then the magnitude of induced current at t=0.25 s will be -
Answer» The instantaneous magnetic flux associated with a closed loop of resistance $10 Ω$ is given by, $ϕ = 6 t^{2} - 5 t + 1$ , then the magnitude of induced current at $t = 0.25 s$ will be -

Discussion

47.	What is the integration of 1/kx dx ?
Answer» What is the integration of 1/kx dx ?

Discussion

48.	Which of the following is/are true in case of molecules?
Answer» Which of the following is/are true in case of molecules?

Discussion

49.	Sulphurous acid (H2SO3) has Ka1=1.7×10−2 and Ka2=6.4×10−8. The pH of 0.588 M H2SO3 is.(Round off to the nearest integer)
Answer» Sulphurous acid $(H_{2} S O_{3})$ has $K_{a_{1}} = 1.7 \times 10^{- 2}$ and $K_{a_{2}} = 6.4 \times 10^{- 8}$ . The $p H$ of $0.588 M H_{2} S O_{3}$ is. (Round off to the nearest integer)

Discussion

50.	Decomposition of 3A(g)→2B(g)+2C(g) follows first-order kinetic. Initially, only A is present in the container. The pressure developed after 20 min and infinite time are 3.5 and 4 atm, respectively. Which of the following is true?
Answer» Decomposition of $3 A (g) \to 2 B (g) + 2 C (g)$ follows first-order kinetic. Initially, only $A$ is present in the container. The pressure developed after $20 min$ and infinite time are $3.5$ and $4 atm$ , respectively. Which of the following is true?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Find the major product 'B' in the above reaction.

The number of close neighbour in a facecentred cubic lattice of identical sphere is

Towards catayltic hydrogenation,the least reactive compound is 1) CH2=CH2 2)CH3-CH=CH2 3)H3C-CH=CH-CH3 4)(CH3)2 C=C(CH3)2

15. 5L of a gaseous mixture of ethane and propane are burnt to produce total 11L of CO2 .volume of C2H6 in initial mixture

Which of the following can have meso form?

37.Minimum de-Broglie wavelength is associated with? (1) electron (2)proton (3)CO2 (4)SO2

Arrange the following as directed:(a) Increasing order of basic strength:Aniline, p – nitroaniline and p – toluidine.(b) Decreasing order of basic strength in gas phase:C2H5NH2, (C2H5)2NH, (C2H5)3N and NH3.(c) Increasing order of solubility in water:C6H5NH2, (C2H5)2NH, C2H5NH2.

Naphthalene, a white solid used to make mothballs, has a vapour pressure of 0.10 mm Hg at 27oC. Kp (in atm) and Kc for the equilibrium are : C10H8(s)⇌C10H8(g)

How is SO2 an air pollutant?

20. Gold crystallises in an fcc lattice. If the edge length of unit cell of gold is 350 pm, the radius of gold atom will be

What are the possible distances between 2 octahedral voids in FCC lattice?

Hybridization state of the central atom in HgCl2 is ?

What is the product when 2-Methyl-prop-1-ene is reacted with bromine water?

31. Which of the following organic compounds has same hybridization as its combustion products 1.Ethane 2.Ethyne 3.Ethene 4.Ethanol

The equivalent weight of metal whose 1g carbonate on heating gives 0.6 of metal oxide, i

The correct statement regarding F - centre is

Geometrical isomerism is shown by:

160) C6H5CONHCH3 can be converted into C6H5CH2NHCH3 by 1) NaBH4 2) H2-Pd/C 3) LiAlH4 4) Zn-Hg/HC

An acidified solution of 0.05 M Zn2+ is saturated with 0.1 M H2S. What is the minimum molar concentration (M) of H+ required to prevent the precipitation of ZnS?Use KSP(ZnS)=1.25×10−22 and overall dissociation constant of H2S.KNET=K1K2=1×10−21

The following is a partial redox equation:MnO−4+8H++xe−⟶Mn2++4H2OThe value of the coefficient 'x' is:

35. The rate of reaction is triple when temperature changes from 20^° C to 50^° C calculate the energy of activation

A Galvanic cell is composed of two hydrogen electrodes, one of which is a standard one. In which of the following solutions should the other electrode be immersed to get maximum emf.

49. Difference between zero order reaction and pseudo zero order reaction .

Why does an electron not fall in the nucleus?

....... is the by-product obtained in the Serpeck's process -

What is a Ficin ? And what is its function ? Explain in detail.

The area enclosed by y2=4x and line y=mx is equal to 2 then the value of m is

Carry out the following reactions:-a)benzene to m-bromonitrobenzene b)acetylene to but-1-yne c)ethane to ethanoic acidm

What are isotopes

The size of iso electronic species F− , Ne and Na+ is affected by

Why isnt the half life of zero order reactions infinite?

Two bulbs ‘A’ and ‘B’ emit red light and yellow light at 8000 Å and 4000 Å respectively. The number of photons emitted by both the bulbs per second is the same. If the red bulb is labelled as 100 watts, find the wattage of the yellow bulb.

How many isomeric dienes with a six membered ring are possible of the compound with the molecular formula C7H10, while two consecutive double bonds are not possible in six membered ring?

What is NAND and AND gate?

A decapeptide (Mol. Wt. 796) on complete hydrolysis gives glycine (Mol. Wt. 75), alanine and phenylalanine. Glycine contributes 47.0% to the total weight of the hydrolysed products. The number of glycine units present in the decapeptide is ___

4. With 63 gm of oxalic acid how many litres of N/10 solution can be preoared (1) 100 litre (2) 10 litre (3) 1 litre (4) 1000 litre

(i) An atomic orbital has n = 3. What are the possible values of l and ml ? (ii) List the quantum numbers (ml and l) of electrons for 3d orbital. (iii) Which of the following orbitals are possible? 1p, 2s, 2p and 3f

Why are crystalline solids anisotropic

ntwhy are tertiary amines recemic mixture?n

Dites vrai ou faux.1. En été, il fait beau.2. En hiver, il fait nuit tard.3. En automne, il pleut.4. La neige tombe en été.5. Il fait chaud au mois de juin en Inde.

Two water taps together can fill a tank in 75/8 hrs. The tap of larger diameter takes 10 hours less than the smaller one to fill the tank separately. Find the time in which each tap can separately fill the tank.

The instantaneous magnetic flux associated with a closed loop of resistance 10 Ω is given by, ϕ=6t2−5t+1, then the magnitude of induced current at t=0.25 s will be -

What is the integration of 1/kx dx ?

Which of the following is/are true in case of molecules?

Sulphurous acid (H2SO3) has Ka1=1.7×10−2 and Ka2=6.4×10−8. The pH of 0.588 M H2SO3 is.(Round off to the nearest integer)

Decomposition of 3A(g)→2B(g)+2C(g) follows first-order kinetic. Initially, only A is present in the container. The pressure developed after 20 min and infinite time are 3.5 and 4 atm, respectively. Which of the following is true?