46295 + Interview Questions in Chemistry

1.	Which of the following is not a meta directing group?
Answer» Which of the following is not a meta directing group?

Discussion

2.	24. Ti dissolve 0.8 g metal completely ,100 ml of 2 N HCl is used. The equivalent weight of the metal is?
Answer» 24. Ti dissolve 0.8 g metal completely ,100 ml of 2 N HCl is used. The equivalent weight of the metal is?

Discussion

3.	3. The total number of electrons in 1.6 g of CH, tothat in 1.8 g of H2O(1) Double(2) Same(3) Triple(4) One fourth
Answer» 3. The total number of electrons in 1.6 g of CH, tothat in 1.8 g of H2O(1) Double(2) Same(3) Triple(4) One fourth

Discussion

4.	49. What is the bond order of carbon dioxide and carbonate
Answer» 49. What is the bond order of carbon dioxide and carbonate

Discussion

5.	Q The number of isomers of [Co(dien)Cl3](Where dien is diethylene triamine) (1) 2(2) 3(3) 4(4) 5
Answer» Q The number of isomers of [Co(dien)Cl3] (Where dien is diethylene triamine) (1) 2 (2) 3 (3) 4 (4) 5

Discussion

6.	What is trigonal lattice??
Answer» What is trigonal lattice??

Discussion

7.	Write structures of theproducts of the following reactions:(i) (ii) (iii)
Answer» Write structures of the products of the following reactions: (i) (ii) (iii)

7.

Write structures of theproducts of the following reactions:(i) (ii) (iii)

Answer»

Write structures of the
products of the following reactions:

(i)

(ii)

(iii)

Discussion

8.	Molecular weight of KMnO4 in acidic medium and neutral medium will be respectively :
Answer» Molecular weight of $K M n O_{4}$ in acidic medium and neutral medium will be respectively :

Discussion

9.	A gas occupies a volume of 2 L at STP. It is provided with 58.65 J of heat so that its volume becomes 2.5 L at 1 atm. Calculate the change in its internal energy. (Take 1atm.L=101.3 J)
Answer» A gas occupies a volume of $2 L$ at STP. It is provided with $58.65 J$ of heat so that its volume becomes $2.5 L$ at $1 a t m$ . Calculate the change in its internal energy. $(T a k e 1 a t m . L = 101. 3 J)$

Discussion

10.	Is there any intermolecular hydrogen bonding in aldehydes and ketones??
Answer» Is there any intermolecular hydrogen bonding in aldehydes and ketones??

Discussion

11.	For a NaCl unit cell, the Na+ occupies the edge centres and body centred positions of cube while Cl− occupies the corners and face centres of the cube. Which is the correct expression for determining packing fraction (P.F.) of NaCl unit cell, if ions along an edge diagonal are absent?
Answer» For a NaCl unit cell, the $N a^{+}$ occupies the edge centres and body centred positions of cube while $C l^{-}$ occupies the corners and face centres of the cube. Which is the correct expression for determining packing fraction (P.F.) of NaCl unit cell, if ions along an edge diagonal are absent?

Discussion

12.	29.Why free radicals don't rearrange as three degree like neopentyl .
Answer» 29.Why free radicals don't rearrange as three degree like neopentyl .

Discussion

13.	27. DMG +NiCl2+NH4OH makes Complex a+ NH4Cl+H2O. What is complex a and find the hybridisation magnetic character and Oxidation state of Nickel in complex a ?
Answer» 27. DMG +NiCl2+NH4OH makes Complex a+ NH4Cl+H2O. What is complex a and find the hybridisation magnetic character and Oxidation state of Nickel in complex a ?

Discussion

14.	The strength of sigma bonds formed by the overlapping of atomic orbitals is in the order:
Answer» The strength of sigma bonds formed by the overlapping of atomic orbitals is in the order:

Discussion

15.	how to find the equivalent weight of k2so4.Al2(so4)3.24H2o.
Answer» how to find the equivalent weight of k2so4.Al2(so4)3.24H2o.

Discussion

16.	Find the total number of test which can be used to differentaite between ethyl alcohol and methyl alcohol.1. Fehling test2. Schiff's reagent3. Victor Mayer test4. Lucas test5. NaOH+I26. Reaction with Na Metal
Answer» Find the total number of test which can be used to differentaite between ethyl alcohol and methyl alcohol. $1. Fehling test$ $2. Schiff's reagent$ $3. Victor Mayer test$ $4. Lucas test$ $5. N a O H + I_{2}$ $6. Reaction with Na Metal$

Discussion

17.	Calculate pH of 1MPO3−4 (aq) solution pkb(PO3−4)=1.62
Answer» Calculate pH of $1 M P O_{4}^{3 -}$ (aq) solution $p^{k_{b}} (P O_{4}^{3 -}) = 1.62$

Discussion

18.	What is the role of Ag2O, H2O in Hoffman exhaustive methylation?
Answer» What is the role of Ag2O, H2O in Hoffman exhaustive methylation?

Discussion

19.	How many moles of electrons weigh one kilogram? (Mass of electron =9.108×10−31 kg, Avogadro’s number =6.023×1023)
Answer» How many moles of electrons weigh one kilogram? (Mass of electron $= 9.108 \times 10^{- 31} k g$ , Avogadro’s number $= 6.023 \times 10^{23}$ )

19.

How many moles of electrons weigh one kilogram? (Mass of electron =9.108×10−31 kg, Avogadro’s number =6.023×1023)

Answer»

How many moles of electrons weigh one kilogram? (Mass of electron $= 9.108 \times 10^{- 31} k g$ , Avogadro’s number $= 6.023 \times 10^{23}$ )

Discussion

20.	31. Calculate the heat of combustion of ethene CH2=CH2(g)+3O2(g) >2CO2(g)+2H2O(l) The bond energy data are given below C=C-619kJ mol-1 C-H-414kJ mol-1 O=O-499kJ mol-1 C=O-724kJ mol-1 O-H-460kJ mol-1
Answer» 31. Calculate the heat of combustion of ethene CH2=CH2(g)+3O2(g) >2CO2(g)+2H2O(l) The bond energy data are given below C=C-619kJ mol-1 C-H-414kJ mol-1 O=O-499kJ mol-1 C=O-724kJ mol-1 O-H-460kJ mol-1

Discussion

21.	How many lattice points are there in one unit cell of each of the following ? a) FCC b) BCC c) Edge centered
Answer» How many lattice points are there in one unit cell of each of the following ? a) FCC b) BCC c) Edge centered

Discussion

22.	conversion of propene to bromopropan
Answer» conversion of propene to bromopropan

Discussion

23.	Select the correct decreasing order of the oxidation state of nitrogen in the following options:
Answer» Select the correct decreasing order of the oxidation state of nitrogen in the following options:

Discussion

24.	Biothional is an example of :
Answer» Biothional is an example of :

Discussion

25.	An element (atomic mass = 100 u) having BCC structure has an edge length of 400 pm. The density of the element is:
Answer» An element (atomic mass = $100 u$ ) having $B C C$ structure has an edge length of $400 p m$ . The density of the element is:

Discussion

26.	45.Predicte the hybridization of (iodine)3'-
Answer» 45.Predicte the hybridization of (iodine)3'-

Discussion

27.	What is meant by Polar molecules? and what are non polar molecules?
Answer» What is meant by Polar molecules? and what are non polar molecules?

Discussion

28.	What is the difference between metals and meta lloids?
Answer» What is the difference between metals and meta lloids?

Discussion

29.	HOW TO IDENTIFY THE LIMITING AGENT IN FOLLOWING 1.100ATOMS OF A +100 ATOMS OF B 2.WHEN 4 MOLES OF H2 REACTS WITH 2 MOLES OF O2, THEN 4 MOLES OF WATER IS FORMED
Answer» HOW TO IDENTIFY THE LIMITING AGENT IN FOLLOWING 1.100ATOMS OF A +100 ATOMS OF B 2.WHEN 4 MOLES OF H2 REACTS WITH 2 MOLES OF O2, THEN 4 MOLES OF WATER IS FORMED

Discussion

30.	Which of the following alkaline earth metal sulphates has its hydration energy greater than its lattice energy?
Answer» Which of the following alkaline earth metal sulphates has its hydration energy greater than its lattice energy?

Discussion

31.	Two moles of an ideal monatomic gas undergo a cyclic process ABCA as shown in the figure. The ratio of temperature at B and A can be represented as 3x2y . Find (x + y).
Answer» Two moles of an ideal monatomic gas undergo a cyclic process ABCA as shown in the figure. The ratio of temperature at B and A can be represented as $\frac{3^{x}}{2^{y}}$ . Find (x + y).

Discussion

32.	The First Law of Thermodynamics states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy. This means that heat energy cannot be created or destroyed. It can, however, be transferred from one location to another and converted to and from other forms of energy.The equation for the first law of thermodynamics is given as;ΔU=q+W Where,Two moles of an ideal gas expanded isothermally and reversibly from 1 L to 10 L at 300 K. What is the enthalpy change?
Answer» The First Law of Thermodynamics states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy. This means that heat energy cannot be created or destroyed. It can, however, be transferred from one location to another and converted to and from other forms of energy. The equation for the first law of thermodynamics is given as; $Δ U = q + W$ Where, Two moles of an ideal gas expanded isothermally and reversibly from $1 L to 10 L$ at $300 K$ . What is the enthalpy change?

32.

The First Law of Thermodynamics states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy. This means that heat energy cannot be created or destroyed. It can, however, be transferred from one location to another and converted to and from other forms of energy.The equation for the first law of thermodynamics is given as;ΔU=q+W Where,Two moles of an ideal gas expanded isothermally and reversibly from 1 L to 10 L at 300 K. What is the enthalpy change?

Answer»

The First Law of Thermodynamics states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy. This means that heat energy cannot be created or destroyed. It can, however, be transferred from one location to another and converted to and from other forms of energy.

The equation for the first law of thermodynamics is given as;

$Δ U = q + W$

Where,

Two moles of an ideal gas expanded isothermally and reversibly from

1 L to 10 L

at

300 K

. What is the enthalpy change?

Discussion

33.	Which of the following are anionic detergents? (a) Sodium salts of sulphonated long chain alcohol (b) Ester of stearic acid and polyethylene glycol (c) Quarternary ammonium salt of amine with acetate ion (d) Sodium salts of sulphonated long chain hydrocarbons
Answer» Which of the following are anionic detergents? (a) Sodium salts of sulphonated long chain alcohol (b) Ester of stearic acid and polyethylene glycol (c) Quarternary ammonium salt of amine with acetate ion (d) Sodium salts of sulphonated long chain hydrocarbons

Discussion

34.	In which of the following pairs of resonating structures first resonating structure is more contributing toward resonance hybrid than second?
Answer» In which of the following pairs of resonating structures first resonating structure is more contributing toward resonance hybrid than second?

Discussion

35.	The structure of CH2=C=CH2 is
Answer» The structure of $C H_{2} = C = C H_{2}$ is

Discussion

36.	assertion:vibrational energy of diatomic molecule corresponding to each degree of freedom is k_BT. reason:for every molecule vibrational degree of freedom is 2 explain how reason will be wrong
Answer» assertion:vibrational energy of diatomic molecule corresponding to each degree of freedom is k_BT. reason:for every molecule vibrational degree of freedom is 2 explain how reason will be wrong

Discussion

37.	1. CH3-CHCl-CH2-CH3 has a chiral centre which one of the following represents its R configuration?
Answer» 1. CH3-CHCl-CH2-CH3 has a chiral centre which one of the following represents its R configuration?

Discussion

38.	Which one of the following statement regarding molecular orbital is incorrect
Answer» Which one of the following statement regarding molecular orbital is incorrect

Discussion

39.	A real gas at its critical points has the value of RTc8Pc=0.2 L/mol. (Where R is the gas constant). If this gas follows the equation P(V − nb) = nRT at STP, then find the volume (in litres) of the container in which 3 moles of this gas is occupied at STP. (Assume T= 0∘ C and P=1 atm at STP)
Answer» A real gas at its critical points has the value of $\frac{R T_{c}}{8 P_{c}} = 0.2 L / m o l$ . (Where R is the gas constant). If this gas follows the equation P(V − nb) = nRT at STP, then find the volume (in litres) of the container in which 3 moles of this gas is occupied at STP. (Assume T= $0^{\circ} C$ and P=1 atm at STP)

Discussion

40.	Which alkylbromide will yield 3-Methyl-1-hexene as the major product upon treatment with potassium t-butoxide in t-butyl alcohol (solvent)?
Answer» Which alkylbromide will yield 3-Methyl-1-hexene as the major product upon treatment with potassium t-butoxide in t-butyl alcohol (solvent)?

Discussion

41.	A sample of limestone is 20% pure. Find the mass of CO2 produced by decomposing 40 g of that sample of limestone.
Answer» A sample of limestone is $20 %$ pure. Find the mass of $C O_{2}$ produced by decomposing $40 g$ of that sample of limestone.

Discussion

42.	What is the resultant pH of the solution if equal volumes of two solutions with pH=5 and pH=9 are mixed at 25 oC?
Answer» What is the resultant $p H$ of the solution if equal volumes of two solutions with $p H = 5$ and $p H = 9$ are mixed at $25^{o} C$ ?

Discussion

43.	An atom X crystallizes in fcc unit cell having an edge length a=100√2 pm . What would be the radius of tetrahedral void present in the unit cell?
Answer» An atom X crystallizes in fcc unit cell having an edge length $a = 100 \sqrt{2} p m$ . What would be the radius of tetrahedral void present in the unit cell?

Discussion

44.	when a less electronegative atom makes bond with more electronegative atom then why it is said to be oxidation of less electronegative element?
Answer» when a less electronegative atom makes bond with more electronegative atom then why it is said to be oxidation of less electronegative element?

Discussion

45.	Identify the product Y in the following reaction sequence
Answer» Identify the product Y in the following reaction sequence

45.

Identify the product Y in the following reaction sequence

Answer»

Identify the product Y in the following reaction sequence

Discussion

46.	K, for A(g)+ B(g) 3C(g) is 30 at 298 K. If a twolitre vessel contains 1, 2 and 5 moles of A, B and Crespectively, the reaction at 298 K shall
Answer» K, for A(g)+ B(g) 3C(g) is 30 at 298 K. If a twolitre vessel contains 1, 2 and 5 moles of A, B and Crespectively, the reaction at 298 K shall

Discussion

47.	What is the concentration of O2 in a fresh water stream in equilibrium with air at 25o C and 1.0 bar ?Given that , at 1 bar oxygen in air is 21% by volume K′H (Henry's law constant) for O2=1.3×10−3 mol/kg bar at 25o C.
Answer» What is the concentration of $O_{2}$ in a fresh water stream in equilibrium with air at $25^{o} C$ and $1.0 b a r$ ? Given that , at $1 b a r$ oxygen in air is $21 % by volume$ $K_{H}^{'}$ (Henry's law constant) for $O_{2} = 1.3 \times 10^{- 3} m o l / k g b a r$ at $25^{o} C .$

Discussion

48.	How many of the following ores belong to either aluminium or copper? Bauxite, Siderite, Diaspore, Cuprite, Malachite, Carborundum, Kaolinite, Azurite, Calamine, Cerussite, Cassiterite, Dolomite
Answer» How many of the following ores belong to either aluminium or copper? Bauxite, Siderite, Diaspore, Cuprite, Malachite, Carborundum, Kaolinite, Azurite, Calamine, Cerussite, Cassiterite, Dolomite

Discussion

49.	The number of octahedral void(s) per atom present in a face - centered cubic unit cell is:[1 mark]
Answer» The number of octahedral void(s) per atom present in a face - centered cubic unit cell is: [1 mark]

Discussion

50.	57.If the de-Broglie wavelength of an electron revolving in 2nd orbit of H atom is X then radius of that orbit is given by. OPTIONS:A)X/pi B)2X/pi C)X/2pi D)Cannot be predicted
Answer» 57.If the de-Broglie wavelength of an electron revolving in 2nd orbit of H atom is X then radius of that orbit is given by. OPTIONS:A)X/pi B)2X/pi C)X/2pi D)Cannot be predicted

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following is not a meta directing group?

24. Ti dissolve 0.8 g metal completely ,100 ml of 2 N HCl is used. The equivalent weight of the metal is?

3. The total number of electrons in 1.6 g of CH, tothat in 1.8 g of H2O(1) Double(2) Same(3) Triple(4) One fourth

49. What is the bond order of carbon dioxide and carbonate

Q The number of isomers of [Co(dien)Cl3](Where dien is diethylene triamine) (1) 2(2) 3(3) 4(4) 5

What is trigonal lattice??

Write structures of theproducts of the following reactions:(i) (ii) (iii)

Molecular weight of KMnO4 in acidic medium and neutral medium will be respectively :

A gas occupies a volume of 2 L at STP. It is provided with 58.65 J of heat so that its volume becomes 2.5 L at 1 atm. Calculate the change in its internal energy. (Take 1atm.L=101.3 J)

Is there any intermolecular hydrogen bonding in aldehydes and ketones??

For a NaCl unit cell, the Na+ occupies the edge centres and body centred positions of cube while Cl− occupies the corners and face centres of the cube. Which is the correct expression for determining packing fraction (P.F.) of NaCl unit cell, if ions along an edge diagonal are absent?

29.Why free radicals don't rearrange as three degree like neopentyl .

27. DMG +NiCl2+NH4OH makes Complex a+ NH4Cl+H2O. What is complex a and find the hybridisation magnetic character and Oxidation state of Nickel in complex a ?

The strength of sigma bonds formed by the overlapping of atomic orbitals is in the order:

how to find the equivalent weight of k2so4.Al2(so4)3.24H2o.

Find the total number of test which can be used to differentaite between ethyl alcohol and methyl alcohol.1. Fehling test2. Schiff's reagent3. Victor Mayer test4. Lucas test5. NaOH+I26. Reaction with Na Metal

Calculate pH of 1MPO3−4 (aq) solution pkb(PO3−4)=1.62

What is the role of Ag2O, H2O in Hoffman exhaustive methylation?

How many moles of electrons weigh one kilogram? (Mass of electron =9.108×10−31 kg, Avogadro’s number =6.023×1023)

31. Calculate the heat of combustion of ethene CH2=CH2(g)+3O2(g) >2CO2(g)+2H2O(l) The bond energy data are given below C=C-619kJ mol-1 C-H-414kJ mol-1 O=O-499kJ mol-1 C=O-724kJ mol-1 O-H-460kJ mol-1

How many lattice points are there in one unit cell of each of the following ? a) FCC b) BCC c) Edge centered

conversion of propene to bromopropan

Select the correct decreasing order of the oxidation state of nitrogen in the following options:

Biothional is an example of :

An element (atomic mass = 100 u) having BCC structure has an edge length of 400 pm. The density of the element is:

45.Predicte the hybridization of (iodine)3'-

What is meant by Polar molecules? and what are non polar molecules?

What is the difference between metals and meta lloids?

HOW TO IDENTIFY THE LIMITING AGENT IN FOLLOWING 1.100ATOMS OF A +100 ATOMS OF B 2.WHEN 4 MOLES OF H2 REACTS WITH 2 MOLES OF O2, THEN 4 MOLES OF WATER IS FORMED

Which of the following alkaline earth metal sulphates has its hydration energy greater than its lattice energy?

Two moles of an ideal monatomic gas undergo a cyclic process ABCA as shown in the figure. The ratio of temperature at B and A can be represented as 3x2y . Find (x + y).

Which of the following are anionic detergents? (a) Sodium salts of sulphonated long chain alcohol (b) Ester of stearic acid and polyethylene glycol (c) Quarternary ammonium salt of amine with acetate ion (d) Sodium salts of sulphonated long chain hydrocarbons

In which of the following pairs of resonating structures first resonating structure is more contributing toward resonance hybrid than second?

The structure of CH2=C=CH2 is

assertion:vibrational energy of diatomic molecule corresponding to each degree of freedom is k_BT. reason:for every molecule vibrational degree of freedom is 2 explain how reason will be wrong

1. CH3-CHCl-CH2-CH3 has a chiral centre which one of the following represents its R configuration?

Which one of the following statement regarding molecular orbital is incorrect

A real gas at its critical points has the value of RTc8Pc=0.2 L/mol. (Where R is the gas constant). If this gas follows the equation P(V − nb) = nRT at STP, then find the volume (in litres) of the container in which 3 moles of this gas is occupied at STP. (Assume T= 0∘ C and P=1 atm at STP)

Which alkylbromide will yield 3-Methyl-1-hexene as the major product upon treatment with potassium t-butoxide in t-butyl alcohol (solvent)?

A sample of limestone is 20% pure. Find the mass of CO2 produced by decomposing 40 g of that sample of limestone.

What is the resultant pH of the solution if equal volumes of two solutions with pH=5 and pH=9 are mixed at 25 oC?

An atom X crystallizes in fcc unit cell having an edge length a=100√2 pm . What would be the radius of tetrahedral void present in the unit cell?

when a less electronegative atom makes bond with more electronegative atom then why it is said to be oxidation of less electronegative element?

Identify the product Y in the following reaction sequence

K, for A(g)+ B(g) 3C(g) is 30 at 298 K. If a twolitre vessel contains 1, 2 and 5 moles of A, B and Crespectively, the reaction at 298 K shall

What is the concentration of O2 in a fresh water stream in equilibrium with air at 25o C and 1.0 bar ?Given that , at 1 bar oxygen in air is 21% by volume K′H (Henry's law constant) for O2=1.3×10−3 mol/kg bar at 25o C.

How many of the following ores belong to either aluminium or copper? Bauxite, Siderite, Diaspore, Cuprite, Malachite, Carborundum, Kaolinite, Azurite, Calamine, Cerussite, Cassiterite, Dolomite

The number of octahedral void(s) per atom present in a face - centered cubic unit cell is:[1 mark]

57.If the de-Broglie wavelength of an electron revolving in 2nd orbit of H atom is X then radius of that orbit is given by. OPTIONS:A)X/pi B)2X/pi C)X/2pi D)Cannot be predicted