46295 + Interview Questions in Chemistry

1.	A compound of vanadium has a spin magnetic moment of 1.73 BM. Work out the electronic configuration of the vanadium ion in the compound.
Answer» A compound of vanadium has a spin magnetic moment of 1.73 BM. Work out the electronic configuration of the vanadium ion in the compound.

Discussion

2.	Calculate the enthalpy change for the following reaction CH4(g) + 2O2(g)→CO2(g) + 2H2O(l) Given enthalpies of formation of CH4, CO2 & H2O are −74.8KJ mol−1,−393.5KJ mol−1 and −286.2KJ mol−1 respectively.
Answer» Calculate the enthalpy change for the following reaction $C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O (l)$ Given enthalpies of formation of $C H_{4}, C O_{2} & H_{2} O$ are $- 74.8 K J m o l^{- 1}, - 393.5 K J m o l^{- 1}$ and $- 286.2 K J m o l^{- 1}$ respectively.

Discussion

3.	The compound formed upon combustion of Na in excess air is
Answer» The compound formed upon combustion of Na in excess air is

Discussion

4.	The number of atoms in 100 g of a fcc crystal with density =10.0 g/cm3 and cell edge equal to 200 pm is equal to:
Answer» The number of atoms in 100 g of a fcc crystal with density $= 10.0 {g/cm}^{3}$ and cell edge equal to 200 pm is equal to:

Discussion

5.	How for liquids coefficient of volume expansion is independant of temperature ? and how bottom of lake or pond start to freeze if water does not have anomalous behaviour?
Answer» How for liquids coefficient of volume expansion is independant of temperature ? and how bottom of lake or pond start to freeze if water does not have anomalous behaviour?

Discussion

6.	Q. Why sodium peroxide is used as an oxidising agent in inorganic chemistry , since sodium is a strong reducing agent ?
Answer» Q. Why sodium peroxide is used as an oxidising agent in inorganic chemistry , since sodium is a strong reducing agent ?

Discussion

7.	The efficiency of a fuel cell is given by
Answer» The efficiency of a fuel cell is given by

Discussion

8.	Sulphide ions in alkaline solution react with solid sulphur to form polyvalent sulphide ions. The equilibrium constant for the formation of S2−2 and S2−3 from S and S2− ions are 1.7 and 5.3 respectively. Equilibrium constant for the formation of S−23 from S is:
Answer» Sulphide ions in alkaline solution react with solid sulphur to form polyvalent sulphide ions. The equilibrium constant for the formation of $S_{2}^{2 -}$ and $S_{3}^{2 -}$ from S and $S^{2 -}$ ions are 1.7 and 5.3 respectively. Equilibrium constant for the formation of $S_{3}^{- 2}$ from S is:

Discussion

9.	For enthalpy of formation/combustion questions, how would one know the chemical formula of the compound given in the question if the compound is given in words?
Answer» For enthalpy of formation/combustion questions, how would one know the chemical formula of the compound given in the question if the compound is given in words?

Discussion

10.	An organic compound A(C2H6O) reacts with Na to give compound B with evolution of H2gas. A is heated with conc H2SO4 at 413K to give compound C. Compound A is :
Answer» An organic compound A(C₂H₆O) reacts with Na to give compound B with evolution of H₂gas. A is heated with conc H₂SO₄ at 413K to give compound C. Compound A is :

Discussion

11.	Fill in the blank. Boiling point of solution containing a non volatile solute is always ---- the boiling point of pure solvent in which solution is prepared.
Answer» Fill in the blank. Boiling point of solution containing a non volatile solute is always ---- the boiling point of pure solvent in which solution is prepared.

Discussion

12.	In set of reactions, ethylbenzene yielded a product D D should be
Answer» In set of reactions, ethylbenzene yielded a product D D should be

12.

In set of reactions, ethylbenzene yielded a product D D should be

Answer»

In set of reactions, ethylbenzene yielded a product D

D should be

Discussion

13.	To get a uniform and smooth coating of superior metal,
Answer» To get a uniform and smooth coating of superior metal,

Discussion

14.	If 'x' is the molecular axis then which kind of overlapping will form a π bond:
Answer» If 'x' is the molecular axis then which kind of overlapping will form a $π$ bond:

Discussion

15.	Which of the following species are formed by Lewis acid-base interaction?
Answer» Which of the following species are formed by Lewis acid-base interaction?

Discussion

16.	An alkene (A) C16H16 on ozonolysis gives only one product (B) (C8H8O). Compound (B) on reaction with NH2OHH2SO4,Δ gives N - methyl benzamide the compound 'A' is -
Answer» An alkene (A) $C_{16} H_{16}$ on ozonolysis gives only one product (B) $(C_{8} H_{8} O)$ . Compound (B) on reaction with $\frac{N H_{2} O H}{H_{2} S O_{4}}, Δ$ gives N - methyl benzamide the compound 'A' is -

Discussion

17.	For an isothermal expansion of a perfect gas, the value of △PP is equal
Answer» For an isothermal expansion of a perfect gas, the value of $\frac{△ P}{P}$ is equal

Discussion

18.	The number of isomers possible for a disubstituted benzene are:
Answer» The number of isomers possible for a disubstituted benzene are:

Discussion

19.	Reduction of BaSO4 with C gives
Answer» Reduction of $B a S O_{4}$ with C gives

Discussion

20.	Catenation is self linking property of:
Answer» Catenation is self linking property of:

Discussion

21.	Determine which substance is oxidized and which substance is reduced in the following reactions: CO2(g)+H2(g)→CO(g)+H2O(g)
Answer» Determine which substance is oxidized and which substance is reduced in the following reactions: $C O_{2} (g) + H_{2} (g) \to C O (g) + H_{2} O (g)$

Discussion

22.	Red lead is:
Answer» Red lead is:

Discussion

23.	Which of the among the following is more acidic ?
Answer» Which of the among the following is more acidic ?

Discussion

24.	Which of the following is not a valid condition for hybridisation?
Answer» Which of the following is not a valid condition for hybridisation?

24.

Which of the following is not a valid condition for hybridisation?

Answer»

Which of the following is not a valid condition for hybridisation?

Discussion

25.	What is ozonolysis pls explain in detail with a diagram?
Answer» What is ozonolysis pls explain in detail with a diagram?

Discussion

26.	Which of the following inner orbital octahedral complex ions are diamagnetic?
Answer» Which of the following inner orbital octahedral complex ions are diamagnetic?

Discussion

27.	Atomicity of ammonium phosphate molecule is a)5 b)10 c)15 d)20 What is atomicity?
Answer» Atomicity of ammonium phosphate molecule is a)5 b)10 c)15 d)20 What is atomicity?

Discussion

28.	What is the correct condensed representation of the following structure?
Answer» What is the correct condensed representation of the following structure?

Discussion

29.	Which of the following is not a transition element?
Answer» Which of the following is not a transition element?

Discussion

30.	Which bond angle will result in maximum dipole moment for XY2?
Answer» Which bond angle will result in maximum dipole moment for $X Y_{2}$ ?

Discussion

31.	Sublimation energy is the heat required to change one mole of solid to gas. I don't understand why metals have sublimation energy, the reason being that they are solid substances and even at very high temperatures, they exist as a liquid. How can there be a metal in gaseous form?
Answer» Sublimation energy is the heat required to change one mole of solid to gas. I don't understand why metals have sublimation energy, the reason being that they are solid substances and even at very high temperatures, they exist as a liquid. How can there be a metal in gaseous form?

31.

Sublimation energy is the heat required to change one mole of solid to gas. I don't understand why metals have sublimation energy, the reason being that they are solid substances and even at very high temperatures, they exist as a liquid. How can there be a metal in gaseous form?

Answer»

Sublimation energy is the heat required to change one mole of solid to gas.

I don't understand why metals have sublimation energy, the reason being that they are solid substances and even at very high temperatures, they exist as a liquid. How can there be a metal in gaseous form?

Discussion

32.	The half of the chapter of linear inequalities do not present in byju's
Answer» The half of the chapter of linear inequalities do not present in byju's

Discussion

33.	Can I get the formulae related to mole concept?
Answer» Can I get the formulae related to mole concept?

Discussion

34.	End product of the following reaction is
Answer» End product of the following reaction is

Discussion

35.	Electrolysis is carried out in three cells : (A) - 1.0M CuSO4, Pt electrodes; (B) - 1.0 M CuSO4,, Copper electrode; (C) - 1.0 M KCl, Pt electrodes. If the volume of electrolytic solution is maintained constant in each of the cells, which is correct set of pH changes in (A), (B) and (C) cells respectively?
Answer» Electrolysis is carried out in three cells : (A) - 1.0 $M C u S O_{4},$ Pt electrodes; (B) - 1.0 $M C u S O_{4},$ , Copper electrode; (C) - 1.0 $M K C l$ , Pt electrodes. If the volume of electrolytic solution is maintained constant in each of the cells, which is correct set of pH changes in (A), (B) and (C) cells respectively?

Discussion

36.	A solid has a structure in which W atoms are located at the corners of a cubic lattice, O atoms at the centres of edges and Na atom at the centre of the cube. The formula of the compound is
Answer» A solid has a structure in which W atoms are located at the corners of a cubic lattice, O atoms at the centres of edges and Na atom at the centre of the cube. The formula of the compound is

Discussion

37.	In the equation k = PZAB e-Ea/RT, P (probability factor) takes into account the fact that during a collision, molecules must be:
Answer» In the equation k = PZ_AB e^-E_a^/RT, P (probability factor) takes into account the fact that during a collision, molecules must be:

Discussion

38.	2.5 mL of 25M weak monoacidic base (Kb=1×10−12) at 25oC is titrated with 215M HCl in water at 25oC. The concentration of H+ at equivalence point is (Kw=1×10−14 at 25oC)
Answer» 2.5 mL of $\frac{2}{5} M$ weak monoacidic base ( $K_{b} = 1 \times 10^{- 12}$ ) at $25^{o} C$ is titrated with $\frac{2}{15} M$ HCl in water at $25^{o} C .$ The concentration of $H^{+}$ at equivalence point is $(K_{w} = 1 \times 10^{- 14} a t 25^{o} C)$

Discussion

39.	How much must be a 0.02 M solution of sodium be diluted at 250C in order to double the degree of hydrolysis?
Answer» How much must be a 0.02 M solution of sodium be diluted at 25⁰C in order to double the degree of hydrolysis?

Discussion

40.	The number of secondary carbon atom in (CH3)2CHCH2CH(CH3)2 is:
Answer» The number of secondary carbon atom in (CH₃)₂CHCH₂CH(CH₃)₂ is:

Discussion

41.	18 g of glucose is added to 178.2 g of water. The vapour pressure of water for this aqueous solution at 100º C is:
Answer» 18 g of glucose is added to 178.2 g of water. The vapour pressure of water for this aqueous solution at 100º C is:

Discussion

42.	What is stoichiometry? and it's calculations
Answer» What is stoichiometry? and it's calculations

Discussion

43.	The Correct IUPAC name of the following compound is HOOC−CH2−COOH\|C\|OH−CH2−COOH
Answer» The Correct IUPAC name of the following compound is $H O O C - C H_{2} - C O O H \| C \| O H - C H_{2} - C O O H$

Discussion

44.	In a DNA molecule, the distance between two bases is
Answer» In a DNA molecule, the distance between two bases is

Discussion

45.	The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight. The crystal class is
Answer» The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight. The crystal class is

Discussion

46.	Which kind of defects are introduced by doping? (a) Dislocation defect (b) Schottky defect (c) Frenkel defect (d) Electronic defect
Answer» Which kind of defects are introduced by doping? (a) Dislocation defect (b) Schottky defect (c) Frenkel defect (d) Electronic defect

46.

Which kind of defects are introduced by doping? (a) Dislocation defect (b) Schottky defect (c) Frenkel defect (d) Electronic defect

Answer»

Which kind of defects are introduced by doping?

(a) Dislocation defect (b) Schottky defect

(c) Frenkel defect (d) Electronic defect

Discussion

47.	If the ionisation energy of hydrogen atom is 13.6 eV, what will be the ionisation energy of He+ and Li2+ ions respectively?
Answer» If the ionisation energy of hydrogen atom is $13.6 e V$ , what will be the ionisation energy of $H e^{+}$ and $L i^{2 +}$ ions respectively?

Discussion

48.	Which of the following shape of the molecule is not obtained from the trigonal bipyramidal electron geometry of the central atom?
Answer» Which of the following shape of the molecule is not obtained from the trigonal bipyramidal electron geometry of the central atom?

Discussion

49.	HCl is added to the following oxides which one would give H2O2
Answer» HCl is added to the following oxides which one would give $H_{2} O_{2}$

49.

HCl is added to the following oxides which one would give H2O2

Answer»

HCl is added to the following oxides which one would give $H_{2} O_{2}$

Discussion

50.	The main product of the following reaction is
Answer» The main product of the following reaction is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A compound of vanadium has a spin magnetic moment of 1.73 BM. Work out the electronic configuration of the vanadium ion in the compound.

Calculate the enthalpy change for the following reaction CH4(g) + 2O2(g)→CO2(g) + 2H2O(l) Given enthalpies of formation of CH4, CO2 &amp; H2O are −74.8KJ mol−1,−393.5KJ mol−1 and −286.2KJ mol−1 respectively.

The compound formed upon combustion of Na in excess air is

The number of atoms in 100 g of a fcc crystal with density =10.0 g/cm3 and cell edge equal to 200 pm is equal to:

How for liquids coefficient of volume expansion is independant of temperature ? and how bottom of lake or pond start to freeze if water does not have anomalous behaviour?

Q. Why sodium peroxide is used as an oxidising agent in inorganic chemistry , since sodium is a strong reducing agent ?

The efficiency of a fuel cell is given by

Sulphide ions in alkaline solution react with solid sulphur to form polyvalent sulphide ions. The equilibrium constant for the formation of S2−2 and S2−3 from S and S2− ions are 1.7 and 5.3 respectively. Equilibrium constant for the formation of S−23 from S is:

For enthalpy of formation/combustion questions, how would one know the chemical formula of the compound given in the question if the compound is given in words?

An organic compound A(C2H6O) reacts with Na to give compound B with evolution of H2gas. A is heated with conc H2SO4 at 413K to give compound C. Compound A is :

Fill in the blank. Boiling point of solution containing a non volatile solute is always ---- the boiling point of pure solvent in which solution is prepared.

In set of reactions, ethylbenzene yielded a product D D should be

To get a uniform and smooth coating of superior metal,

If 'x' is the molecular axis then which kind of overlapping will form a π bond:

Which of the following species are formed by Lewis acid-base interaction?

An alkene (A) C16H16 on ozonolysis gives only one product (B) (C8H8O). Compound (B) on reaction with NH2OHH2SO4,Δ gives N - methyl benzamide the compound 'A' is -

For an isothermal expansion of a perfect gas, the value of △PP is equal

The number of isomers possible for a disubstituted benzene are:

Reduction of BaSO4 with C gives

Catenation is self linking property of:

Determine which substance is oxidized and which substance is reduced in the following reactions: CO2(g)+H2(g)→CO(g)+H2O(g)

Red lead is:

Which of the among the following is more acidic ?

Which of the following is not a valid condition for hybridisation?

What is ozonolysis pls explain in detail with a diagram?

Which of the following inner orbital octahedral complex ions are diamagnetic?

Atomicity of ammonium phosphate molecule is a)5 b)10 c)15 d)20 What is atomicity?

What is the correct condensed representation of the following structure?

Which of the following is not a transition element?

Which bond angle will result in maximum dipole moment for XY2?

Sublimation energy is the heat required to change one mole of solid to gas. I don't understand why metals have sublimation energy, the reason being that they are solid substances and even at very high temperatures, they exist as a liquid. How can there be a metal in gaseous form?

The half of the chapter of linear inequalities do not present in byju's

Can I get the formulae related to mole concept?

End product of the following reaction is

A solid has a structure in which W atoms are located at the corners of a cubic lattice, O atoms at the centres of edges and Na atom at the centre of the cube. The formula of the compound is

In the equation k = PZAB e-Ea/RT, P (probability factor) takes into account the fact that during a collision, molecules must be:

2.5 mL of 25M weak monoacidic base (Kb=1×10−12) at 25oC is titrated with 215M HCl in water at 25oC. The concentration of H+ at equivalence point is (Kw=1×10−14 at 25oC)

How much must be a 0.02 M solution of sodium be diluted at 250C in order to double the degree of hydrolysis?

The number of secondary carbon atom in (CH3)2CHCH2CH(CH3)2 is:

18 g of glucose is added to 178.2 g of water. The vapour pressure of water for this aqueous solution at 100º C is:

What is stoichiometry? and it's calculations

The Correct IUPAC name of the following compound is HOOC−CH2−COOH|C|OH−CH2−COOH

In a DNA molecule, the distance between two bases is

The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight. The crystal class is

Which kind of defects are introduced by doping? (a) Dislocation defect (b) Schottky defect (c) Frenkel defect (d) Electronic defect

If the ionisation energy of hydrogen atom is 13.6 eV, what will be the ionisation energy of He+ and Li2+ ions respectively?

Which of the following shape of the molecule is not obtained from the trigonal bipyramidal electron geometry of the central atom?

HCl is added to the following oxides which one would give H2O2

The main product of the following reaction is

Calculate the enthalpy change for the following reaction CH4(g) + 2O2(g)→CO2(g) + 2H2O(l) Given enthalpies of formation of CH4, CO2 & H2O are −74.8KJ mol−1,−393.5KJ mol−1 and −286.2KJ mol−1 respectively.