46295 + Interview Questions in Chemistry

1.	A solution of weak acid HA was titrated with base NaOH. The equivalence point was reached when 36.12 mL of 0.1 M NaOH was added. Now 18.06 mL of 0.1 M HCl were added to titrated solution, the pH was found to be 4.92. What will be the pH of the solution obtained by mixing 10 mL of 0.2 M NaOH and 10 mL of 0.2 M HA?
Answer» A solution of weak acid $H A$ was titrated with base $N a O H$ . The equivalence point was reached when $36.12 m L$ of $0.1 M N a O H$ was added. Now $18.06 m L$ of $0.1 M H C l$ were added to titrated solution, the pH was found to be $4.92$ . What will be the $p H$ of the solution obtained by mixing $10 m L$ of $0.2 M N a O H$ and $10 m L$ of $0.2 M H A$ ?

Discussion

2.	The correct order in which the O−O bond length increases in the following is:
Answer» The correct order in which the $O - O$ bond length increases in the following is:

Discussion

3.	Xenon crystallizes in the face-centred cubic lattice and the edge of the unit cell is 620 pm. What is the nearest neighbor distance and what is the radius of xenon atom?
Answer» Xenon crystallizes in the face-centred cubic lattice and the edge of the unit cell is 620 pm. What is the nearest neighbor distance and what is the radius of xenon atom?

Discussion

4.	How to knowif an atom in a molecule is situated in an axial or equatorial position?
Answer» How to knowif an atom in a molecule is situated in an axial or equatorial position?

Discussion

5.	The mole fraction of a solute in a 100 molal aqueous solution is ×10−2. (Round off to the nearest integer). [Given : Atomic mass of H = 1.0 u ; Atomic mass of O = 16.0 u]
Answer» The mole fraction of a solute in a 100 molal aqueous solution is $\times 10^{- 2}$ . (Round off to the nearest integer). [Given : Atomic mass of H = 1.0 u ; Atomic mass of O = 16.0 u]

Discussion

6.	Orthoboric acid contain discrete units of
Answer» Orthoboric acid contain discrete units of

Discussion

7.	Domain of 1/1-2sinx
Answer» Domain of 1/1-2sinx

Discussion

8.	Which of the following will have the largest value of entropy at 25`c and 1atm and why? 1)CH4 2)H2 3)C2H6 4)C2H2
Answer» Which of the following will have the largest value of entropy at 25`c and 1atm and why? 1)CH4 2)H2 3)C2H6 4)C2H2

Discussion

9.	When LiNO3 is heated, it gives Li2O whereas other alkali metal nitrates decompose to give corresponding 1)Nitrate 2)both nitrate and oxide 3) peroxide 4)Non
Answer» When LiNO3 is heated, it gives Li2O whereas other alkali metal nitrates decompose to give corresponding 1)Nitrate 2)both nitrate and oxide 3) peroxide 4)Non

Discussion

10.	The number of moles of KCl in 3 L of 3 M solution is
Answer» The number of moles of KCl in 3 L of 3 M solution is

Discussion

11.	Identify the compound which can show geometrical isomerism.
Answer» Identify the compound which can show geometrical isomerism.

Discussion

12.	20.What is the angular momentum of an electron in d orbit ? Options- a.\sqrt{}6h. b.6h. c.3h. d.8h
Answer» 20.What is the angular momentum of an electron in d orbit ? Options- a.\sqrt{}6h. b.6h. c.3h. d.8h

Discussion

13.	7.How to find peroxy linkage in K3CrO8 without drawing structure
Answer» 7.How to find peroxy linkage in K3CrO8 without drawing structure

Discussion

14.	The OH− concentration in a mixture of 5.0mL of 0.0504 MNH4Cl and 2 mL of 0.0210MNH3 solution is x×10−6M. The value of x is .......(Nearest integer) [Given KW=1×10−14andKb=1.8×10−5]
Answer» The $O H^{-}$ concentration in a mixture of 5.0mL of 0.0504 M $N H_{4} C l$ and 2 mL of $0.0210 M N H_{3}$ solution is $x \times 10^{- 6} M$ . The value of x is .......(Nearest integer) [Given $K_{W} = 1 \times 10^{- 14} a n d K b = 1.8 \times 10^{- 5}$ ]

Discussion

15.	I. Ph−CH3i. CrO2Cl2−−−−−−−→ii. H+/H2O II. Ph−CCl3KOH−−−→excess III. Ph−CH2OHPCC−−−→ IV. Ph−O\|\|C−ClH2−−−−−−−→Pd−BaSO4 V. Ph−C≡Ni. SnCl2/HCl−−−−−−−−→ii. H+/H2O VI. Ph−HCO/HCl−−−−−−−−→anhyd. AlCl3 VII. Ph−HCH3Cl−−−−−−−−→anhyd. AlCl3H+,KMnO4−−−−−−−→Δ Consider following reactions and give the number of reactions which prooduce benzaldehyde as final major product.
Answer» $I . P h - C H_{3} i . C r O_{2} C l_{2} - ------ \to i i . H^{+} / H_{2} O$ $I I . P h - C C l_{3} K O H - -- \to excess$ $I I I . P h - C H_{2} O H P C C - -- \to$ $I V . P h - O \| \| C - C l H_{2} - ------ \to P d - B a S O_{4}$ $V . P h - C \equiv N i . S n C l_{2} / H C l - ------- \to i i . H^{+} / H_{2} O$ $V I . P h - H C O / H C l - ------- \to anhyd. A l C l_{3}$ $V I I . P h - H C H_{3} C l - ------- \to anhyd. A l C l_{3} H^{+}, K M n O_{4} - ------ \to Δ$ Consider following reactions and give the number of reactions which prooduce benzaldehyde as final major product.

Discussion

16.	Acetone is obtained by the hydrolysis of the addition product of methyl magnesium iodide and :- (1) HCHO (2) CH3CHO (3) Acetone (4) Ethanenitrile
Answer» Acetone is obtained by the hydrolysis of the addition product of methyl magnesium iodide and :- (1) HCHO (2) CH3CHO (3) Acetone (4) Ethanenitrile

Discussion

17.	smallest possible alkane with ethyl group as substituent possess molecular mass is
Answer» smallest possible alkane with ethyl group as substituent possess molecular mass is

Discussion

18.	Does the force constant of a material depend on length or area of cross section ?
Answer» Does the force constant of a material depend on length or area of cross section ?

Discussion

19.	The volume required to prepare 2.0 L of 3.0 M H2SO4 solution from 96% ( w/w) H2SO4 solution (density =2 g mL−1) is
Answer» The volume required to prepare $2.0 L$ of $3.0 M$ $H_{2} S O_{4}$ solution from $96 % ( w/w)$ $H_{2} S O_{4}$ solution (density $= 2 g {mL}^{- 1}$ ) is

Discussion

20.	53. How to find the oxidation state of an compound ??
Answer» 53. How to find the oxidation state of an compound ??

Discussion

21.	Which of the following compound gives a positive iodoform test ?
Answer» Which of the following compound gives a positive iodoform test ?

Discussion

22.	63. Oxidation no of boron in NaBH4
Answer» 63. Oxidation no of boron in NaBH4

Discussion

23.	What is the molarity of H2SO4 solution that has a density of 1.84 g cc−1 and contains 98% by mass of H2SO4? (Given atomic mass of S = 32 amu)
Answer» What is the molarity of $H_{2} S O_{4}$ solution that has a density of $1.84 {g cc}^{- 1}$ and contains 98% by mass of $H_{2} S O_{4}$ ? (Given atomic mass of S = 32 amu)

Discussion

24.	At constant pressure,the heat needed to increase the temperature of one gram mole oxygen gas through 1°C is (a)2.5R (b)3.5R (c)1.5R (d)R
Answer» At constant pressure,the heat needed to increase the temperature of one gram mole oxygen gas through 1°C is (a)2.5R (b)3.5R (c)1.5R (d)R

Discussion

25.	Which of the following is the major product formed during dinitration of 3-methylphenol?
Answer» Which of the following is the major product formed during dinitration of $3-methylphenol$ ?

Discussion

26.	33.Why compounds having molecular formula Mabcdef form 15 geometerical isomers
Answer» 33.Why compounds having molecular formula Mabcdef form 15 geometerical isomers

Discussion

27.	48. One Mole of an ideal gas taken from A to B along two paths denoted by the solid and the dashed lines as shown in the graph below .If the work done along the solid line path is Es and that along the dotted line path is Wd then what is the closest integer to the ratio Wd/Ws
Answer» 48. One Mole of an ideal gas taken from A to B along two paths denoted by the solid and the dashed lines as shown in the graph below .If the work done along the solid line path is Es and that along the dotted line path is Wd then what is the closest integer to the ratio Wd/Ws

Discussion

28.	Two oxides of a metal, one contain 27.6% and 30% oxygen respectively. If the formula of the first oxide is M3O4, find the formula of the second.
Answer» Two oxides of a metal, one contain 27.6% and 30% oxygen respectively. If the formula of the first oxide is $M_{3} O_{4}$ , find the formula of the second.

Discussion

29.	simple method to find out bond order
Answer» simple method to find out bond order

Discussion

30.	The dissociation constant of a weak acid is 1.0 × 10−5. The equilibrium constant for the reaction with strong base is
Answer» The dissociation constant of a weak acid is $1.0 \times 10^{- 5}$ . The equilibrium constant for the reaction with strong base is

30.

The dissociation constant of a weak acid is 1.0 × 10−5. The equilibrium constant for the reaction with strong base is

Answer»

The dissociation constant of a weak acid is $1.0 \times 10^{- 5}$ . The equilibrium

constant for the reaction with strong base is

Discussion

31.	Under which of the following conditions ∆H=∆E ? i. When a process is carried out in A closed vessel ii. When reaction involves only solid and liquids iii. When ∆ng =0iv. All of these
Answer» Under which of the following conditions ∆H=∆E ? i. When a process is carried out in A closed vessel ii. When reaction involves only solid and liquids iii. When ∆ng =0 iv. All of these

Discussion

32.	57 Aqueous solution of CoCl3.6NH3 upon addition with AgNo3 produces 3 moles white precipitate. Primary and secondary valency of metal in this complex is
Answer» 57 Aqueous solution of CoCl3.6NH3 upon addition with AgNo3 produces 3 moles white precipitate. Primary and secondary valency of metal in this complex is

Discussion

33.	E, m, J & G denote energy, mass, angular momentum and gravitational constant respectively. Find the dimensions of EJ²/m⁵G².
Answer» E, m, J & G denote energy, mass, angular momentum and gravitational constant respectively. Find the dimensions of EJ²/m⁵G².

Discussion

34.	Does a particular p-orbital orientation (px, py, pz) correspond to a particular value of m (magnetic quantum number 0, +1, -1)?
Answer» Does a particular p-orbital orientation (px, py, pz) correspond to a particular value of m (magnetic quantum number 0, +1, -1)?

Discussion

35.	If a 100 mL of urea solution is isotonic with 10% (w/V) solution of cane sugar , then calculate the weight of urea in the urea solutionGiven: The molecular mass of cane sugar is 342 g mol−1 and that of urea is 60 g mol−1.
Answer» If a $100 m L$ of urea solution is isotonic with $10 % (w / V)$ solution of cane sugar , then calculate the weight of urea in the urea solution Given: The molecular mass of cane sugar is $342 g m o l^{- 1}$ and that of urea is $60 g m o l^{- 1}$ .

Discussion

36.	what mass of CaO will be required to remove the hardness of 1000L of water containing 1.62 g of calcium bicarbonate per lt
Answer» what mass of CaO will be required to remove the hardness of 1000L of water containing 1.62 g of calcium bicarbonate per lt

Discussion

37.	How is ammonia manufactures industrially?
Answer» How is ammonia manufactures industrially?

Discussion

38.	How many significant figures are there in 2700kg
Answer» How many significant figures are there in 2700kg

Discussion

39.	Which among the following species is an ambident nucleophile?
Answer» Which among the following species is an ambident nucleophile?

Discussion

40.	10. In the reaction of sodium thiosulphate with I2 in aqueous medium, the equivalent weight of sodium thiosulphate is equal to
Answer» 10. In the reaction of sodium thiosulphate with I2 in aqueous medium, the equivalent weight of sodium thiosulphate is equal to

Discussion

41.	What is pseudo berry rotation in chemistry?
Answer» What is pseudo berry rotation in chemistry?

Discussion

42.	Which of the following is a correct match
Answer» Which of the following is a correct match

Discussion

43.	wha developed long form of periodic table
Answer» wha developed long form of periodic table

Discussion

44.	All formulas of ch real number
Answer» All formulas of ch real number

Discussion

45.	An organic compound contains 20% carbon, 6.7% hydrogen, and 46.67% nitrogen. Its molecular weight was found to be 60. Find the molecular formula of the compound.
Answer» An organic compound contains 20% carbon, 6.7% hydrogen, and 46.67% nitrogen. Its molecular weight was found to be 60. Find the molecular formula of the compound.

Discussion

46.	In which of the following molecules all the atoms follow octet rule?
Answer» In which of the following molecules all the atoms follow octet rule?

Discussion

47.	The concentration of Ag+ ions in a saturated solution of Ag2C2O4 is 2.2×10−4 mol L−1. The Solubility product of Ag2C2O4 is:
Answer» The concentration of $A g^{+}$ ions in a saturated solution of $A g_{2} C_{2} O_{4}$ is $2.2 \times 10^{- 4} m o l L^{- 1}$ . The Solubility product of $A g_{2} C_{2} O_{4}$ is:

Discussion

48.	Equivalent weight of B(OH), is40.t3Mol.mass(2)Mol.massHt23M.mass(4)Mol.mass(3)418.
Answer» Equivalent weight of B(OH), is40.t3Mol.mass(2)Mol.massHt23M.mass(4)Mol.mass(3)418.

Discussion

49.	The paramagnetic species among the following is:Na+,Zn2+,Cu+,Fe3+
Answer» The paramagnetic species among the following is: $N a^{+}, Z n^{2 +}, C u^{+}, F e^{3 +}$

Discussion

50.	A mixture containing 1.12 litres of H_{2 }and 1.12 litres of D_2 (deuterium) at N.T. P, is taken inside a bulb connected to another bulb by a stop-cock with a small opening. The second bulb is fully evacuated, the stop-cock is opened for a certain time and then closed. The first bulb is now found to contain 0.05 g of H_2 Determine the percentage composition by weight of the gases in thesecond bulb.
Answer» A mixture containing 1.12 litres of H_{2 }and 1.12 litres of D_2 (deuterium) at N.T. P, is taken inside a bulb connected to another bulb by a stop-cock with a small opening. The second bulb is fully evacuated, the stop-cock is opened for a certain time and then closed. The first bulb is now found to contain 0.05 g of H_2 Determine the percentage composition by weight of the gases in thesecond bulb.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The correct order in which the O−O bond length increases in the following is:

Xenon crystallizes in the face-centred cubic lattice and the edge of the unit cell is 620 pm. What is the nearest neighbor distance and what is the radius of xenon atom?

How to knowif an atom in a molecule is situated in an axial or equatorial position?

The mole fraction of a solute in a 100 molal aqueous solution is ×10−2. (Round off to the nearest integer). [Given : Atomic mass of H = 1.0 u ; Atomic mass of O = 16.0 u]

Orthoboric acid contain discrete units of

Domain of 1/1-2sinx

Which of the following will have the largest value of entropy at 25`c and 1atm and why? 1)CH4 2)H2 3)C2H6 4)C2H2

When LiNO3 is heated, it gives Li2O whereas other alkali metal nitrates decompose to give corresponding 1)Nitrate 2)both nitrate and oxide 3) peroxide 4)Non

The number of moles of KCl in 3 L of 3 M solution is

Identify the compound which can show geometrical isomerism.

20.What is the angular momentum of an electron in d orbit ? Options- a.\sqrt{}6h. b.6h. c.3h. d.8h

7.How to find peroxy linkage in K3CrO8 without drawing structure

The OH− concentration in a mixture of 5.0mL of 0.0504 MNH4Cl and 2 mL of 0.0210MNH3 solution is x×10−6M. The value of x is .......(Nearest integer) [Given KW=1×10−14andKb=1.8×10−5]

Acetone is obtained by the hydrolysis of the addition product of methyl magnesium iodide and :- (1) HCHO (2) CH3CHO (3) Acetone (4) Ethanenitrile

smallest possible alkane with ethyl group as substituent possess molecular mass is

Does the force constant of a material depend on length or area of cross section ?

The volume required to prepare 2.0 L of 3.0 M H2SO4 solution from 96% ( w/w) H2SO4 solution (density =2 g mL−1) is

53. How to find the oxidation state of an compound ??

Which of the following compound gives a positive iodoform test ?

63. Oxidation no of boron in NaBH4

What is the molarity of H2SO4 solution that has a density of 1.84 g cc−1 and contains 98% by mass of H2SO4? (Given atomic mass of S = 32 amu)

At constant pressure,the heat needed to increase the temperature of one gram mole oxygen gas through 1°C is (a)2.5R (b)3.5R (c)1.5R (d)R

Which of the following is the major product formed during dinitration of 3-methylphenol?

33.Why compounds having molecular formula Mabcdef form 15 geometerical isomers

48. One Mole of an ideal gas taken from A to B along two paths denoted by the solid and the dashed lines as shown in the graph below .If the work done along the solid line path is Es and that along the dotted line path is Wd then what is the closest integer to the ratio Wd/Ws

Two oxides of a metal, one contain 27.6% and 30% oxygen respectively. If the formula of the first oxide is M3O4, find the formula of the second.

simple method to find out bond order

The dissociation constant of a weak acid is 1.0 × 10−5. The equilibrium constant for the reaction with strong base is

Under which of the following conditions ∆H=∆E ? i. When a process is carried out in A closed vessel ii. When reaction involves only solid and liquids iii. When ∆ng =0iv. All of these

57 Aqueous solution of CoCl3.6NH3 upon addition with AgNo3 produces 3 moles white precipitate. Primary and secondary valency of metal in this complex is

E, m, J & G denote energy, mass, angular momentum and gravitational constant respectively. Find the dimensions of EJ²/m⁵G².

Does a particular p-orbital orientation (px, py, pz) correspond to a particular value of m (magnetic quantum number 0, +1, -1)?

If a 100 mL of urea solution is isotonic with 10% (w/V) solution of cane sugar , then calculate the weight of urea in the urea solutionGiven: The molecular mass of cane sugar is 342 g mol−1 and that of urea is 60 g mol−1.

what mass of CaO will be required to remove the hardness of 1000L of water containing 1.62 g of calcium bicarbonate per lt

How is ammonia manufactures industrially?

How many significant figures are there in 2700kg

Which among the following species is an ambident nucleophile?

10. In the reaction of sodium thiosulphate with I2 in aqueous medium, the equivalent weight of sodium thiosulphate is equal to

What is pseudo berry rotation in chemistry?

Which of the following is a correct match

wha developed long form of periodic table

All formulas of ch real number

An organic compound contains 20% carbon, 6.7% hydrogen, and 46.67% nitrogen. Its molecular weight was found to be 60. Find the molecular formula of the compound.

In which of the following molecules all the atoms follow octet rule?

The concentration of Ag+ ions in a saturated solution of Ag2C2O4 is 2.2×10−4 mol L−1. The Solubility product of Ag2C2O4 is:

Equivalent weight of B(OH), is40.t3Mol.mass(2)Mol.massHt23M.mass(4)Mol.mass(3)418.

The paramagnetic species among the following is:Na+,Zn2+,Cu+,Fe3+