46295 + Interview Questions in Chemistry

1.	The correct statement about the compounds A, B and C are
Answer» The correct statement about the compounds A, B and C are

1.

The correct statement about the compounds A, B and C are

Answer»

The correct statement about the compounds A, B and C are

2.	In which of the following compounds, nitrogen exhibits highest oxidation state? (1) N3H (2) NH2OH (3) N2H4 (4) NH
Answer» In which of the following compounds, nitrogen exhibits highest oxidation state? (1) N3H (2) NH2OH (3) N2H4 (4) NH

Discussion

3.	Whar are Lewis acids?
Answer» Whar are Lewis acids?

Discussion

4.	The number of electrons that are paired in oxygen molecule is
Answer» The number of electrons that are paired in oxygen molecule is

Discussion

5.	The end product of the following reaction is
Answer» The end product of the following reaction is

Discussion

6.	Calculate the total pressure in mixture of 8 g of dioxygen and 8 g of dihydrogen confined in a vessel of 1 dm3 at 27 oC.[Take R=0.083 bar dm3 K−1 mol−1]
Answer» Calculate the total pressure in mixture of $8 g$ of dioxygen and $8 g$ of dihydrogen confined in a vessel of $1 {dm}^{3}$ at $27^{o} C$ . [Take $R = 0.083 {bar dm}^{3} K^{- 1} {mol}^{- 1}$ ]

Discussion

7.	The number of nodal planes in 4d subshell is 8 .The number of nodal planes in 4d orbital is 2 except in dz^2.Are the above 2 statements right ?
Answer» The number of nodal planes in 4d subshell is 8 . The number of nodal planes in 4d orbital is 2 except in dz^2. Are the above 2 statements right ?

Discussion

8.	A monoatomic ideal gas undergoes a process in which the ratio from P to V at any instant is constant and equal to 1. What is molar heat capacity of gas? s
Answer» A monoatomic ideal gas undergoes a process in which the ratio from P to V at any instant is constant and equal to 1. What is molar heat capacity of gas? s

Discussion

9.	what is half man reaction?
Answer» what is half man reaction?

Discussion

10.	What is Raoult's FIRST Law of relative lowering of vapour pressure?What is Raoult's SECOND Law of relative lowering of vapour pressure?
Answer» What is Raoult's FIRST Law of relative lowering of vapour pressure? What is Raoult's SECOND Law of relative lowering of vapour pressure?

Discussion

11.	Name some ions and write their symbols.
Answer» Name some ions and write their symbols.

Discussion

12.	An element is represented by ZXA, where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element.Mass number (A) = Number of protons (Z) + Number of neutrons.Isotopes: Atoms having same number of proton Isobar: Elements having same mass numberIsotones: Elements having same number of neutron (A-Z)Which of the following is a pair of isobar?
Answer» An element is represented by $_{Z} X^{A}$ , where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element. Mass number (A) = Number of protons (Z) + Number of neutrons. Isotopes: Atoms having same number of proton Isobar: Elements having same mass number Isotones: Elements having same number of neutron (A-Z) Which of the following is a pair of isobar?

Discussion

13.	What is the solubility order of haloalkanes with respect to the halide ?
Answer» What is the solubility order of haloalkanes with respect to the halide ?

Discussion

14.	Atomic numbers of actinides are from
Answer» Atomic numbers of actinides are from

Discussion

15.	Q3. (a) Which constituents of the air make up to 1% of the total composition of air?(b) Give an example where the air has mass.
Answer» Q3. (a) Which constituents of the air make up to 1% of the total composition of air? (b) Give an example where the air has mass.

Discussion

16.	In an aryl halide halogen atom is bonded to:
Answer» In an aryl halide halogen atom is bonded to:

Discussion

17.	48. identify the group and period of an element having atomic number 117.if group number is x and period is y and x+y=24
Answer» 48. identify the group and period of an element having atomic number 117.if group number is x and period is y and x+y=24

Discussion

18.	55. How much charge is required for the reduction of 1 molecular of MnO4- to mn2+ ?
Answer» 55. How much charge is required for the reduction of 1 molecular of MnO4- to mn2+ ?

Discussion

19.	Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with (i) Iodide (ii) Iron (iii) H2S
Answer» Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with (i) Iodide (ii) Iron (iii) $H_{2} S$

19.

Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with (i) Iodide (ii) Iron (iii) H2S

Answer»

Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with

(i) Iodide

(ii) Iron

(iii) $H_{2} S$

Discussion

20.	Is concentrated hcl and hno3 react or not if yes then what is product?
Answer» Is concentrated hcl and hno3 react or not if yes then what is product?

Discussion

21.	What is the minimum uncertainty in the location (in mm) of a photon of wavelength 2000 ∘A if this wavelength is known to an accuracy of one part in million? (Take π=3,h=6.6×10−34 J s)
Answer» What is the minimum uncertainty in the location (in mm) of a photon of wavelength 2000 $\circ A$ if this wavelength is known to an accuracy of one part in million? (Take $π = 3, h = 6.6 \times 10^{- 34} J s$ )

Discussion

22.	condensation blw which of following compounds followed by dehydration gives methyl vinyl ketone}1)formaldehyde, acetaldehyde2)}formaldehyde, acetone3)two molecules of acetone4)TWO MOLECULES OF ACETALDEHYDE
Answer» condensation blw which of following compounds followed by dehydration gives methyl vinyl ketone}1)formaldehyde, acetaldehyde2)}formaldehyde, acetone3)two molecules of acetone4)TWO MOLECULES OF ACETALDEHYDE

Discussion

23.	Artificial sweetner which is stable under cold conditions only is
Answer» Artificial sweetner which is stable under cold conditions only is

Discussion

24.	What is the mass of urea required for making 2.5kg of 0.25 molality aqueous solution?
Answer» What is the mass of urea required for making 2.5kg of 0.25 molality aqueous solution?

Discussion

25.	Reaction in which, the yield of product(s) increases with an increase in pressure is:
Answer» Reaction in which, the yield of product(s) increases with an increase in pressure is:

Discussion

26.	A 1.2% solution of NaCl is isotonic with 7.2% solution of glucose. Calculate the van't Hoff factor of NaCl
Answer» A $1.2 %$ solution of $N a C l$ is isotonic with $7.2 %$ solution of glucose. Calculate the van't Hoff factor of $N a C l$

Discussion

27.	In the following compounds, The order of acidity is
Answer» In the following compounds, The order of acidity is

27.

In the following compounds, The order of acidity is

Answer»

In the following compounds,

The order of acidity is

Discussion

28.	when mercuric iodide is added to potassium iodide, effect on boiling and freezing point?
Answer» when mercuric iodide is added to potassium iodide, effect on boiling and freezing point?

Discussion

29.	For oxidizing alcohols, several oxidants – each with a multivalent central atom as the active species – can be used. When Dess-Martin periodinane (DMP), with I as the multivalent atom is used, how many bonds to oxygen atoms does each central multivalent atom have just before and immediately after the oxidation respectively?
Answer» For oxidizing alcohols, several oxidants – each with a multivalent central atom as the active species – can be used. When Dess-Martin periodinane (DMP), with I as the multivalent atom is used, how many bonds to oxygen atoms does each central multivalent atom have just before and immediately after the oxidation respectively?

Discussion

30.	ionic character of alkali metal flourides ar
Answer» ionic character of alkali metal flourides ar

Discussion

31.	Definition of inductive effect?
Answer» Definition of inductive effect?

Discussion

32.	Enthalpy of vaporisation of water is 40, 800 J/Mole at 1 atm. pressure. The mountain, where the pressure is 380 mm of H g, water will boil at
Answer» Enthalpy of vaporisation of water is 40, 800 J/Mole at 1 atm. pressure. The mountain, where the pressure is 380 mm of H g, water will boil at

Discussion

33.	What is the number of orbitals In the second energy level of a hydrogen atom?
Answer» What is the number of orbitals In the second energy level of a hydrogen atom?

Discussion

34.	A vessel contains equal mass of CO and CO2. The ratio of their number of molecules in the vessel is
Answer» A vessel contains equal mass of CO and CO2. The ratio of their number of molecules in the vessel is

Discussion

35.	Percentage of ionization of different acid/base will vary in water, like-H2SO4>H2SO3 or HI>HCl. So there will be different concentration of H3O+ /OH- for different acid/base. Then why according to 'Levelling effect of water' all the acids/ base will have same strength in water?
Answer» Percentage of ionization of different acid/base will vary in water, like-H2SO4>H2SO3 or HI>HCl. So there will be different concentration of H3O+ /OH- for different acid/base. Then why according to 'Levelling effect of water' all the acids/ base will have same strength in water?

Discussion

36.	What is the mass of the ppt formed when 50ml of 16.9% solution of AgNo3 is mixed with 50ml of 5.8% NaCl solution.
Answer» What is the mass of the ppt formed when 50ml of 16.9% solution of AgNo3 is mixed with 50ml of 5.8% NaCl solution.

Discussion

37.	what is pentohalides?
Answer» what is pentohalides?

Discussion

38.	On the basis of the following graph (P – V graph), choose the correct statements.
Answer» On the basis of the following graph (P – V graph), choose the correct statements.

Discussion

39.	The magnetic moment of a transition metal ion is found to be 3.87 B.M. It is probably
Answer» The magnetic moment of a transition metal ion is found to be 3.87 B.M. It is probably

Discussion

40.	19. In the electrolysis of CuSO4 sokution How many grams of cu are placed out on the cathode in the time tgat it takes to liberate 5.6gn of O2(g) measured at STP at the anode?a)31.75 b)14.2 c)4.32 d)25.2 A. 90 ml B.10 ml C. 990 ml D. 100 ml
Answer» 19. In the electrolysis of CuSO4 sokution How many grams of cu are placed out on the cathode in the time tgat it takes to liberate 5.6gn of O2(g) measured at STP at the anode?a)31.75 b)14.2 c)4.32 d)25.2 A. 90 ml B.10 ml C. 990 ml D. 100 ml

Discussion

41.	Which of the following is a synthetic polymer
Answer» Which of the following is a synthetic polymer

Discussion

42.	22.Aldehyde group , carboxylic acid group , fluorine Order of -I effect with reason
Answer» 22.Aldehyde group , carboxylic acid group , fluorine Order of -I effect with reason

Discussion

43.	The compounds (P) and (R) are respectively
Answer» The compounds (P) and (R) are respectively

Discussion

44.	The correct order of stability for the following free radicals is:
Answer» The correct order of stability for the following free radicals is:

Discussion

45.	Chlorobenzeneconc H2SO4, conc HNO3−−−−−−−−−−−−−−−→ΔAi. KOH, Δ−−−−−−→ii. H+(B)(B)Br2/H2O−−−−−→(1 equiv.)(C)Sn/HCl−−−−−→(D)Ac2O−−−−−→(1 equiv.)(E)E will be:
Answer» $Chlorobenzene conc H_{2} S O_{4}, conc H N O_{3} - -------------- \to Δ A i . K O H, Δ - ----- \to i i . H^{+} (B)$ $(B) B r_{2} / H_{2} O - ---- \to (1 equiv.) (C) S n / H C l - ---- \to (D) A c_{2} O - ---- \to (1 equiv.) (E)$ E will be:

Discussion

46.	Which one of the following carbocation is the most stable?
Answer» Which one of the following carbocation is the most stable?

Discussion

47.	Q 13/15 Among F2, Cl2, O2 and N2 which has leastbond dissociation enthalpy?1.F2 2.C_{}2 3.O2 4.N2
Answer» Q 13/15 Among F2, Cl2, O2 and N2 which has leastbond dissociation enthalpy?1.F2 2.C_{}2 3.O2 4.N2

Discussion

48.	17. Which of the following reactions can be used for the preparation of alkyl halide A)CH3CH2OH +HCL in presence of anhydrous zncl2 B)CH3CH2OH + HCL C)(CH3)3COH + HCL D)(CH3)2CHOH+ HCL 1-D 2-3&4 3-1,3,4 4-1&2
Answer» 17. Which of the following reactions can be used for the preparation of alkyl halide A)CH3CH2OH +HCL in presence of anhydrous zncl2 B)CH3CH2OH + HCL C)(CH3)3COH + HCL D)(CH3)2CHOH+ HCL 1-D 2-3&4 3-1,3,4 4-1&2

Discussion

49.	Consider the nuclear reaction,X200→A110+B90If the binding energy per nucleon for X, A and B are 7.4 MeV, 8.2 MeV and 8.2 MeV respectively, then the amount of the energy released is-
Answer» Consider the nuclear reaction, $X^{200} \to A^{110} + B^{90}$ If the binding energy per nucleon for $X, A and B$ are $7.4 MeV, 8.2 MeV$ and $8.2 MeV$ respectively, then the amount of the energy released is-

Discussion

50.	Mechanism of polymerisation of ethyne in presence of CuCl and NH4Cl.
Answer» Mechanism of polymerisation of ethyne in presence of CuCl and NH4Cl.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The correct statement about the compounds A, B and C are

In which of the following compounds, nitrogen exhibits highest oxidation state? (1) N3H (2) NH2OH (3) N2H4 (4) NH

Whar are Lewis acids?

The number of electrons that are paired in oxygen molecule is

The end product of the following reaction is

Calculate the total pressure in mixture of 8 g of dioxygen and 8 g of dihydrogen confined in a vessel of 1 dm3 at 27 oC.[Take R=0.083 bar dm3 K−1 mol−1]

The number of nodal planes in 4d subshell is 8 .The number of nodal planes in 4d orbital is 2 except in dz^2.Are the above 2 statements right ?

A monoatomic ideal gas undergoes a process in which the ratio from P to V at any instant is constant and equal to 1. What is molar heat capacity of gas? s

what is half man reaction?

What is Raoult's FIRST Law of relative lowering of vapour pressure?What is Raoult's SECOND Law of relative lowering of vapour pressure?

Name some ions and write their symbols.

What is the solubility order of haloalkanes with respect to the halide ?

Atomic numbers of actinides are from

Q3. (a) Which constituents of the air make up to 1% of the total composition of air?(b) Give an example where the air has mass.

In an aryl halide halogen atom is bonded to:

48. identify the group and period of an element having atomic number 117.if group number is x and period is y and x+y=24

55. How much charge is required for the reduction of 1 molecular of MnO4- to mn2+ ?

Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with (i) Iodide (ii) Iron (iii) H2S

Is concentrated hcl and hno3 react or not if yes then what is product?

What is the minimum uncertainty in the location (in mm) of a photon of wavelength 2000 ∘A if this wavelength is known to an accuracy of one part in million? (Take π=3,h=6.6×10−34 J s)

condensation blw which of following compounds followed by dehydration gives methyl vinyl ketone}1)formaldehyde, acetaldehyde2)}formaldehyde, acetone3)two molecules of acetone4)TWO MOLECULES OF ACETALDEHYDE

Artificial sweetner which is stable under cold conditions only is

What is the mass of urea required for making 2.5kg of 0.25 molality aqueous solution?

Reaction in which, the yield of product(s) increases with an increase in pressure is:

A 1.2% solution of NaCl is isotonic with 7.2% solution of glucose. Calculate the van't Hoff factor of NaCl

In the following compounds, The order of acidity is

when mercuric iodide is added to potassium iodide, effect on boiling and freezing point?

ionic character of alkali metal flourides ar

Definition of inductive effect?

Enthalpy of vaporisation of water is 40, 800 J/Mole at 1 atm. pressure. The mountain, where the pressure is 380 mm of H g, water will boil at

What is the number of orbitals In the second energy level of a hydrogen atom?

A vessel contains equal mass of CO and CO2. The ratio of their number of molecules in the vessel is

Percentage of ionization of different acid/base will vary in water, like-H2SO4>H2SO3 or HI>HCl. So there will be different concentration of H3O+ /OH- for different acid/base. Then why according to 'Levelling effect of water' all the acids/ base will have same strength in water?

What is the mass of the ppt formed when 50ml of 16.9% solution of AgNo3 is mixed with 50ml of 5.8% NaCl solution.

what is pentohalides?

On the basis of the following graph (P – V graph), choose the correct statements.

The magnetic moment of a transition metal ion is found to be 3.87 B.M. It is probably

19. In the electrolysis of CuSO4 sokution How many grams of cu are placed out on the cathode in the time tgat it takes to liberate 5.6gn of O2(g) measured at STP at the anode?a)31.75 b)14.2 c)4.32 d)25.2 A. 90 ml B.10 ml C. 990 ml D. 100 ml

Which of the following is a synthetic polymer

22.Aldehyde group , carboxylic acid group , fluorine Order of -I effect with reason

The compounds (P) and (R) are respectively

The correct order of stability for the following free radicals is:

Chlorobenzeneconc H2SO4, conc HNO3−−−−−−−−−−−−−−−→ΔAi. KOH, Δ−−−−−−→ii. H+(B)(B)Br2/H2O−−−−−→(1 equiv.)(C)Sn/HCl−−−−−→(D)Ac2O−−−−−→(1 equiv.)(E)E will be:

Which one of the following carbocation is the most stable?

Q 13/15 Among F2, Cl2, O2 and N2 which has leastbond dissociation enthalpy?1.F2 2.C_{}2 3.O2 4.N2

17. Which of the following reactions can be used for the preparation of alkyl halide A)CH3CH2OH +HCL in presence of anhydrous zncl2 B)CH3CH2OH + HCL C)(CH3)3COH + HCL D)(CH3)2CHOH+ HCL 1-D 2-3&4 3-1,3,4 4-1&2

Consider the nuclear reaction,X200→A110+B90If the binding energy per nucleon for X, A and B are 7.4 MeV, 8.2 MeV and 8.2 MeV respectively, then the amount of the energy released is-

Mechanism of polymerisation of ethyne in presence of CuCl and NH4Cl.