46295 + Interview Questions in Chemistry

1.	Which of the following molecule does not obey 18 electron rule?
Answer» Which of the following molecule does not obey 18 electron rule?

Discussion

2.	according to sidewick concept of maximum covalency find maximum covalency of F O N?
Answer» according to sidewick concept of maximum covalency find maximum covalency of F O N?

Discussion

3.	It is found that \|A + B\| = \|A\| this naturally necessarily implies1 B=0 2 A and B are parallel 3 A B are perpendicular 4 A.B is less than equal to 0
Answer» It is found that \|A + B\| = \|A\| this naturally necessarily implies 1 B=0 2 A and B are parallel 3 A B are perpendicular 4 A.B is less than equal to 0

Discussion

4.	How how many moles of benzene contain 7.2 g of carbon
Answer» How how many moles of benzene contain 7.2 g of carbon

Discussion

5.	IfNaCl is doped with 10−3mol % of SrCl2,what is the concentration of cation vacancies?
Answer» If NaCl is doped with 10⁻³ mol % of SrCl₂, what is the concentration of cation vacancies?

Discussion

6.	If 31g of P4 is reacted with excess oxygen, the percentage yield is 60%, then the amount of product formed is?
Answer» If 31g of $P_{4}$ is reacted with excess oxygen, the percentage yield is 60%, then the amount of product formed is?

Discussion

7.	The close packing arrangement of ABCABC in 3-D refers to which of the following?
Answer» The close packing arrangement of ABCABC in 3-D refers to which of the following?

Discussion

8.	The IUPAC name of the compound is
Answer» The IUPAC name of the compound is

Discussion

9.	A radiation of energy E falls on a metal whose threshold energy is E0. Then, the kinetic energy is given as:
Answer» A radiation of energy $E$ falls on a metal whose threshold energy is $E_{0}$ . Then, the kinetic energy is given as:

Discussion

10.	46.Minimum wavelength for paschen series without using value of R is
Answer» 46.Minimum wavelength for paschen series without using value of R is

Discussion

11.	When a mixture of diborane and ammonia is heated, the final product is:
Answer» When a mixture of diborane and ammonia is heated, the final product is:

Discussion

12.	Ifthe pressure on a NaCl structure isincreased, then its coordination number will[AFMC 2000]
Answer» If the pressure on a NaCl structure is increased, then its coordination number will [AFMC 2000]

12.

Ifthe pressure on a NaCl structure isincreased, then its coordination number will[AFMC 2000]

Answer»

If
the pressure on a NaCl structure is
increased, then its coordination number will

[AFMC 2000]

Discussion

13.	Allyl chloride on dehydrochlorination gives
Answer» Allyl chloride on dehydrochlorination gives

Discussion

14.	Alkyl benzene to meta bromo alkyl benzen conversion
Answer» Alkyl benzene to meta bromo alkyl benzen conversion

Discussion

15.	Which of the following has the maximum number of unpaired electrons? ( Given Atomic number: Sc=21,Fe=26,V=23,Ni=28)
Answer» Which of the following has the maximum number of unpaired electrons? ( Given Atomic number: $S c = 21, F e = 26, V = 23, N i = 28)$

Discussion

16.	Innucleophilic addition reactions, the reactivities of carbonyl compounds NO2CH2CHO(I), ClCH2CHO(II), CH3CHO(III) and CH3CH2CHO (IV) are in the order of
Answer» Innucleophilic addition reactions, the reactivities of carbonyl compounds NO₂CH₂CHO(I), ClCH₂CHO(II), CH₃CHO(III) and CH₃CH₂CHO (IV) are in the order of

Discussion

17.	A 2.18 g sample contains a mixture of XO and X2O3. It reacts with 0.015 moles of K2Cr2O7 to oxidize the sample completely to form XO−4 and Cr3+. If 0.0187 moles of XO−4 are formed, what is the atomic mass of X?
Answer» A $2.18 g$ sample contains a mixture of $X O$ and $X_{2} O_{3} .$ It reacts with 0.015 moles of $K_{2} C r_{2} O_{7}$ to oxidize the sample completely to form $X O_{4}^{-}$ and $C r^{3 +}$ . If 0.0187 moles of $X O_{4}^{-}$ are formed, what is the atomic mass of X?

Discussion

18.	Out of the two dimensional close packing which is more obvious
Answer» Out of the two dimensional close packing which is more obvious

Discussion

19.	The relationship between osmotic pressures (πglucose,πureaandπsucrose) at a definite temperature when 1g glucose, 1g urea and 1g sucrose are dissloved in 1litre of water is:(Assume Vant Hoff factor(i)=1 for all):Molecular masses for urea, glucose and sucrose are 60 g/mol,180 g/mol & 342 g/mol respectively
Answer» The relationship between osmotic pressures $(π_{g l u c o s e}, π_{u r e a} a n d π_{s u c r o s e})$ at a definite temperature when $1 g$ glucose, $1 g$ urea and $1 g$ sucrose are dissloved in $1 l i t r e$ of water is: (Assume $Vant Hoff factor (i) = 1$ for all): Molecular masses for urea, glucose and sucrose are $60 g / m o l, 180 g / m o l & 342 g / m o l$ respectively

Discussion

20.	65. Correct order of bond energy is 1)I-Cl less than I2 2) Br-F greater than F2 3)Br-F less than I2 4)F2 less than Cl2 4). infinity
Answer» 65. Correct order of bond energy is 1)I-Cl less than I2 2) Br-F greater than F2 3)Br-F less than I2 4)F2 less than Cl2 4). infinity

Discussion

21.	How recognise which atom is oxo and peroxo
Answer» How recognise which atom is oxo and peroxo

Discussion

22.	What is weak and strong acid and base
Answer» What is weak and strong acid and base

Discussion

23.	72 When molten zinc is converted into solid state, acquires HCP structure. The no. of nearest neighbour will be - A. 6 B. 12 C. 8 D. 4
Answer» 72 When molten zinc is converted into solid state, acquires HCP structure. The no. of nearest neighbour will be - A. 6 B. 12 C. 8 D. 4

Discussion

24.	Which of the following oxides is most acidic?
Answer» Which of the following oxides is most acidic?

Discussion

25.	How to find whether a given non ideal solution have positive or negative deviation?
Answer» How to find whether a given non ideal solution have positive or negative deviation?

Discussion

26.	If in a vernier callipers 10 vsd coincides with 8msd then the least count of vernier callipers is (given 1msd=1mm)
Answer» If in a vernier callipers 10 vsd coincides with 8msd then the least count of vernier callipers is (given 1msd=1mm)

Discussion

27.	Choose the correct order(s) of basic strengths of given amines in aqueous phase.
Answer» Choose the correct order(s) of basic strengths of given amines in aqueous phase.

Discussion

28.	WHICH OF THE FOLLOWING GAS HAS MAXIMUM VALUE OF K_H? (1) He(2)H_2(3)N_2(4)CO_2
Answer» WHICH OF THE FOLLOWING GAS HAS MAXIMUM VALUE OF K_H? (1) He(2)H_2(3)N_2(4)CO_2

Discussion

29.	Domain of √1-x² ?
Answer» Domain of √1-x² ?

Discussion

30.	A 5 percent aqueous solution by mass of a nonvolatile solute boils at 100.13∘C. Calculate the molar mass of the solute. (Given : Kb=0.52 K kg mol−1)
Answer» A $5$ percent aqueous solution by mass of a nonvolatile solute boils at ${100.13}^{\circ} C$ . Calculate the molar mass of the solute. (Given : $K_{b} = 0.52 {K kg mol}^{- 1}$ )

Discussion

31.	For the reactionC2H6→C2H4+H2the reaction enthalpy, ΔrH _____k J mol−1.[Round off to the Nearest Integer][Given : Bond enthalpies in kJmol−1C - C : 347, C = C : 611;C - H : 414, H - H : 436]
Answer» For the reaction $C_{2} H_{6} \to C_{2} H_{4} + H_{2}$ the reaction enthalpy, $Δ_{r} H$ _____ $k J m o l^{- 1}$ . [Round off to the Nearest Integer] [Given : Bond enthalpies in $k J m o l^{- 1}$ C - C : 347, C = C : 611; C - H : 414, H - H : 436]

Discussion

32.	The KE and PE (in eV) of electron present in third Bohr’s orbit of hydrogen atom respectively are
Answer» The KE and PE (in eV) of electron present in third Bohr’s orbit of hydrogen atom respectively are

Discussion

33.	What is the de-Broglie wavelength associated withthe hydrogen electron in its third orbit(1) 9.96 x 1010 cm(3) 9.96 x 104 cm(2) 9.96 x 108 cm(4) 9.96 x 10s cm
Answer» What is the de-Broglie wavelength associated withthe hydrogen electron in its third orbit(1) 9.96 x 1010 cm(3) 9.96 x 104 cm(2) 9.96 x 108 cm(4) 9.96 x 10s cm

Discussion

34.	Percentage of isotope Q1 is 23.4% and that of Q2 is 76.6% If Q2 is 8.082 times heavier than {}^{12}C and Q1 is 7.833 times heavier than {}^{12}C then molecualr mass of compound QO_{2 }will be approximately ________
Answer» Percentage of isotope Q1 is 23.4% and that of Q2 is 76.6% If Q2 is 8.082 times heavier than {}^{12}C and Q1 is 7.833 times heavier than {}^{12}C then molecualr mass of compound QO_{2 }will be approximately ________

Discussion

35.	2h2+o2gives 2h2o10g of H2 and 64g of O2 is given which is the limiting reagent
Answer» 2h2+o2gives 2h2o 10g of H2 and 64g of O2 is given which is the limiting reagent

Discussion

36.	Which of the following compound has electrovalent linkage?
Answer» Which of the following compound has electrovalent linkage?

Discussion

37.	The principal involved in leaching A.)difference in volatility B.)difference in density C.)difference in solubility D.)soluble complex formation
Answer» The principal involved in leaching A.)difference in volatility B.)difference in density C.)difference in solubility D.)soluble complex formation

37.

The principal involved in leaching A.)difference in volatility B.)difference in density C.)difference in solubility D.)soluble complex formation

Answer»

The principal involved in leaching

A.)difference in volatility

B.)difference in density

C.)difference in solubility

D.)soluble complex formation

Discussion

38.	If molality of glucose solution is 2m then the mass percent of glucose in the solution is1) 35.5% 2) 22.8%3) 42.2% 4) 26.5%
Answer» If molality of glucose solution is 2m then the mass percent of glucose in the solution is 1) 35.5% 2) 22.8% 3) 42.2% 4) 26.5%

Discussion

39.	What will happen if a de-shelled egg is kept in a concentrated salt solution for 5 minutes?
Answer» What will happen if a de-shelled egg is kept in a concentrated salt solution for 5 minutes?

Discussion

40.	Show the isomers of Pentene
Answer» Show the isomers of Pentene

Discussion

41.	Calculate the temperature of 4.0 mol of a gas occupying 5dm3 at 3.32 bar. (R=0.083bardm3K–1mol–1).
Answer» Calculate the temperature of 4.0 mol of a gas occupying $5 d m^{3}$ at 3.32 bar. $(R = 0.083 b a r d m^{3} K^{- 1} m o l^{- 1})$ .

Discussion

42.	How many structural isomers of butane are possible?
Answer» How many structural isomers of butane are possible?

Discussion

43.	Atomic number of Cr and Fe are 24 and 26 respectively. Which of the following is paramagnetic with the spin of electron?
Answer» Atomic number of Cr and Fe are 24 and 26 respectively. Which of the following is paramagnetic with the spin of electron?

Discussion

44.	Are trailing zeros significant ??
Answer» Are trailing zeros significant ??

Discussion

45.	Bithional is generally added to the soaps as an additive to function as a/an
Answer» Bithional is generally added to the soaps as an additive to function as a/an

Discussion

46.	Formic acid is a stronger acid than acetic acid. This can be explained using
Answer» Formic acid is a stronger acid than acetic acid. This can be explained using

Discussion

47.	The equilibrium constant KP for the reactionN2O4(g)⇌2NO2 (g) is 4.5.What would be the average molar mass (in g⁄mol) of an equilibrium mixture of N2O4 and NO2 formed by the dissociation of pure N2O4 at a total pressure of 2 atm?
Answer» The equilibrium constant $K_{P}$ for the reaction $N_{2} O_{4} (g) ⇌ 2 N O_{2}$ (g) is $4.5$ . What would be the average molar mass (in g⁄mol) of an equilibrium mixture of $N_{2} O_{4}$ and $N O_{2}$ formed by the dissociation of pure $N_{2} O_{4}$ at a total pressure of 2 atm?

Discussion

48.	A metal having atomic mass 60 amu and it forms face centered cubic unit cell.the edge length of the unit cell is 400 pm.find out the density of the element ?
Answer» A metal having atomic mass 60 amu and it forms face centered cubic unit cell.the edge length of the unit cell is 400 pm.find out the density of the element ?

Discussion

49.	The best method of preparation of alkyl halides is:
Answer» The best method of preparation of alkyl halides is:

Discussion

50.	Which one is not a colloidal solution
Answer» Which one is not a colloidal solution

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following molecule does not obey 18 electron rule?

according to sidewick concept of maximum covalency find maximum covalency of F O N?

It is found that |A + B| = |A| this naturally necessarily implies1 B=0 2 A and B are parallel 3 A B are perpendicular 4 A.B is less than equal to 0

How how many moles of benzene contain 7.2 g of carbon

IfNaCl is doped with 10−3mol % of SrCl2,what is the concentration of cation vacancies?

If 31g of P4 is reacted with excess oxygen, the percentage yield is 60%, then the amount of product formed is?

The close packing arrangement of ABCABC in 3-D refers to which of the following?

The IUPAC name of the compound is

A radiation of energy E falls on a metal whose threshold energy is E0. Then, the kinetic energy is given as:

46.Minimum wavelength for paschen series without using value of R is

When a mixture of diborane and ammonia is heated, the final product is:

Ifthe pressure on a NaCl structure isincreased, then its coordination number will[AFMC 2000]

Allyl chloride on dehydrochlorination gives

Alkyl benzene to meta bromo alkyl benzen conversion

Which of the following has the maximum number of unpaired electrons? ( Given Atomic number: Sc=21,Fe=26,V=23,Ni=28)

Innucleophilic addition reactions, the reactivities of carbonyl compounds NO2CH2CHO(I), ClCH2CHO(II), CH3CHO(III) and CH3CH2CHO (IV) are in the order of

A 2.18 g sample contains a mixture of XO and X2O3. It reacts with 0.015 moles of K2Cr2O7 to oxidize the sample completely to form XO−4 and Cr3+. If 0.0187 moles of XO−4 are formed, what is the atomic mass of X?

Out of the two dimensional close packing which is more obvious

65. Correct order of bond energy is 1)I-Cl less than I2 2) Br-F greater than F2 3)Br-F less than I2 4)F2 less than Cl2 4). infinity

How recognise which atom is oxo and peroxo

What is weak and strong acid and base

72 When molten zinc is converted into solid state, acquires HCP structure. The no. of nearest neighbour will be - A. 6 B. 12 C. 8 D. 4

Which of the following oxides is most acidic?

How to find whether a given non ideal solution have positive or negative deviation?

If in a vernier callipers 10 vsd coincides with 8msd then the least count of vernier callipers is (given 1msd=1mm)

Choose the correct order(s) of basic strengths of given amines in aqueous phase.

WHICH OF THE FOLLOWING GAS HAS MAXIMUM VALUE OF K_H? (1) He(2)H_2(3)N_2(4)CO_2

Domain of √1-x² ?

A 5 percent aqueous solution by mass of a nonvolatile solute boils at 100.13∘C. Calculate the molar mass of the solute. (Given : Kb=0.52 K kg mol−1)

For the reactionC2H6→C2H4+H2the reaction enthalpy, ΔrH _____k J mol−1.[Round off to the Nearest Integer][Given : Bond enthalpies in kJmol−1C - C : 347, C = C : 611;C - H : 414, H - H : 436]

The KE and PE (in eV) of electron present in third Bohr’s orbit of hydrogen atom respectively are

What is the de-Broglie wavelength associated withthe hydrogen electron in its third orbit(1) 9.96 x 1010 cm(3) 9.96 x 104 cm(2) 9.96 x 108 cm(4) 9.96 x 10s cm

Percentage of isotope Q1 is 23.4% and that of Q2 is 76.6% If Q2 is 8.082 times heavier than {}^{12}C and Q1 is 7.833 times heavier than {}^{12}C then molecualr mass of compound QO_{2 }will be approximately ________

2h2+o2gives 2h2o10g of H2 and 64g of O2 is given which is the limiting reagent

Which of the following compound has electrovalent linkage?

The principal involved in leaching A.)difference in volatility B.)difference in density C.)difference in solubility D.)soluble complex formation

If molality of glucose solution is 2m then the mass percent of glucose in the solution is1) 35.5% 2) 22.8%3) 42.2% 4) 26.5%

What will happen if a de-shelled egg is kept in a concentrated salt solution for 5 minutes?

Show the isomers of Pentene

Calculate the temperature of 4.0 mol of a gas occupying 5dm3 at 3.32 bar. (R=0.083bardm3K–1mol–1).

How many structural isomers of butane are possible?

Atomic number of Cr and Fe are 24 and 26 respectively. Which of the following is paramagnetic with the spin of electron?

Are trailing zeros significant ??

Bithional is generally added to the soaps as an additive to function as a/an

Formic acid is a stronger acid than acetic acid. This can be explained using

The equilibrium constant KP for the reactionN2O4(g)⇌2NO2 (g) is 4.5.What would be the average molar mass (in g⁄mol) of an equilibrium mixture of N2O4 and NO2 formed by the dissociation of pure N2O4 at a total pressure of 2 atm?

A metal having atomic mass 60 amu and it forms face centered cubic unit cell.the edge length of the unit cell is 400 pm.find out the density of the element ?

The best method of preparation of alkyl halides is:

Which one is not a colloidal solution