46295 + Interview Questions in Chemistry

1.	For the reaction N2(g)+3H2(g)⇌2NH3(g),ΔH=−93.6 kJ mol−1. The concentration of H2 at equilibrium will increase if
Answer» For the reaction $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g), Δ H = - 93.6 k J m o l^{- 1}$ . The concentration of $H_{2}$ at equilibrium will increase if

Discussion

2.	9. Phenol dimerises to benzene having van't hoff factor 0.54.what degree of association is
Answer» 9. Phenol dimerises to benzene having van't hoff factor 0.54.what degree of association is

Discussion

3.	if a molecule has a double bond and a single bond then is it right to say that it has 3 bond pairs.
Answer» if a molecule has a double bond and a single bond then is it right to say that it has 3 bond pairs.

Discussion

4.	The structure of (A) is:
Answer» The structure of (A) is:

Discussion

5.	Benzene was found to form only one ortho disubstituted product
Answer» Benzene was found to form only one ortho disubstituted product

Discussion

6.	The radius (r) of the nucleus of an atom is related to { its mass number (A) as r=R_0A^\ast . The value of x is
Answer» The radius (r) of the nucleus of an atom is related to { its mass number (A) as r=R_0A^\ast . The value of x is

Discussion

7.	The wrong statement about the isoelectric point is:
Answer» The wrong statement about the isoelectric point is:

Discussion

8.	Aqueous solution of Na2SO3 on reaction with Cl2 gives:
Answer» Aqueous solution of $N a_{2} S O_{3}$ on reaction with $C l_{2}$ gives:

Discussion

9.	Calculate the n-factor of KMnO4?
Answer» Calculate the n-factor of $K M n O_{4}$ ?

Discussion

10.	How to determine whether a salt will precipitate or not among some given salts by seeing their Ksp values ?
Answer» How to determine whether a salt will precipitate or not among some given salts by seeing their Ksp values ?

Discussion

11.	What happens when keyltpnes react with aldehydes
Answer» What happens when keyltpnes react with aldehydes

Discussion

12.	A compound does not give a positive test with 2,4-DNP. The compound is:
Answer» A compound does not give a positive test with 2,4-DNP. The compound is:

Discussion

13.	-\|x\|>-3 Then \|x\| is
Answer» -\|x\|>-3 Then \|x\| is

Discussion

14.	The compound that will react most readily with gaseous bromine has the formula is :
Answer» The compound that will react most readily with gaseous bromine has the formula is :

Discussion

15.	During the electrolysis of molten sodium chloride, the time required to produce 0.10 mole of chlorine gas using a current of 3 amperes is: (select the approximate ans)
Answer» During the electrolysis of molten sodium chloride, the time required to produce $0.10 m o l e$ of chlorine gas using a current of $3 a m p e r e s$ is: (select the approximate ans)

Discussion

16.	40. A horizontal tube of length l closed at both the ends contain an ideal gas of molecular mass M. The tube is rotated with angular velocity β about a vertical axis passing through an end. If temperature is constant and P1, P2 are pressures at free end and fixed end respectively, then 1) P1
Answer» 40. A horizontal tube of length l closed at both the ends contain an ideal gas of molecular mass M. The tube is rotated with angular velocity β about a vertical axis passing through an end. If temperature is constant and P1, P2 are pressures at free end and fixed end respectively, then 1) P1

Discussion

17.	How many significant figures are there in this =0.0125 + 0.7864 + 0.0215
Answer» How many significant figures are there in this =0.0125 + 0.7864 + 0.0215

17.

How many significant figures are there in this =0.0125 + 0.7864 + 0.0215

Answer»

How many significant figures are there in this

=0.0125 + 0.7864 + 0.0215

Discussion

18.	23. Calculate the percentage composition of each element in the pure sample of green vitriol
Answer» 23. Calculate the percentage composition of each element in the pure sample of green vitriol

Discussion

19.	in NO3_, ion number of bond p air and lone pair ofelectrons on nitrogen atom are(1) 2,2(2) 3, 1(3) 1,3(4) 4, 0
Answer» in NO3_, ion number of bond p air and lone pair ofelectrons on nitrogen atom are(1) 2,2(2) 3, 1(3) 1,3(4) 4, 0

Discussion

20.	Iodine molecules are held in the crystals lattice by .............. (a) London forces (b) dipole-dipole interacions (c) Covalent bonds (d) coulombic forces
Answer» Iodine molecules are held in the crystals lattice by .............. (a) London forces (b) dipole-dipole interacions (c) Covalent bonds (d) coulombic forces

20.

Iodine molecules are held in the crystals lattice by .............. (a) London forces (b) dipole-dipole interacions (c) Covalent bonds (d) coulombic forces

Answer»

Iodine molecules are held in the crystals lattice by ..............

(a) London forces (b) dipole-dipole interacions

(c) Covalent bonds (d) coulombic forces

Discussion

21.	Sort the following in decreasing order of their magnetic moments.
Answer» Sort the following in decreasing order of their magnetic moments.

Discussion

22.	13Al27 is a stable isotope. 13Al29 is expected to disintegrate by :
Answer» $13^{A l^{27}}$ is a stable isotope. $13^{A l^{29}}$ is expected to disintegrate by :

Discussion

23.	31 At what conc. of solute 'P' the solution will be isotonic with a 5% solution of urea? (Molecular mass of P=342g/mol)
Answer» 31 At what conc. of solute 'P' the solution will be isotonic with a 5% solution of urea? (Molecular mass of P=342g/mol)

Discussion

24.	92 5 moles of solvent A formed ideal solution when mixed with 10 moles of solvent B at a particular temperature .if the vapour pressure of pure A and B be 220 mm of Hg and 550mm of Hg at that temperature find the vapour pressure of the mixture .
Answer» 92 5 moles of solvent A formed ideal solution when mixed with 10 moles of solvent B at a particular temperature .if the vapour pressure of pure A and B be 220 mm of Hg and 550mm of Hg at that temperature find the vapour pressure of the mixture .

Discussion

25.	what is resonance? what is conjugation?
Answer» what is resonance? what is conjugation?

Discussion

26.	Oxygen atom of ether is:
Answer» Oxygen atom of ether is:

Discussion

27.	For a given chemical reaction A→B at 300 K the free energy change is −49.4kJmol−1 and the enthalpy of reaction is 51.4kJmol−1. The entropy change of the reaction is _____JK−1mol−1.
Answer» For a given chemical reaction $A \to B$ at $300 K$ the free energy change is $- 49.4 k J m o l^{- 1}$ and the enthalpy of reaction is $51.4 k J m o l^{- 1}$ . The entropy change of the reaction is _____ $J K^{- 1} m o l^{- 1}$ .

Discussion

28.	11. What is the difference betweem freundilich adsorption curve and langumir adsorption curve?
Answer» 11. What is the difference betweem freundilich adsorption curve and langumir adsorption curve?

Discussion

29.	Q. A chips manufacturing company needs nitrogen for food preservation and packaging? Help them by suggesting the steps to obtain nitrogen from air.
Answer» Q. A chips manufacturing company needs nitrogen for food preservation and packaging? Help them by suggesting the steps to obtain nitrogen from air.

Discussion

30.	R(alkyl) should not be:
Answer» R(alkyl) should not be:

Discussion

31.	Which of the following best describes solids?
Answer» Which of the following best describes solids?

Discussion

32.	How many O-atoms are present in 38 millimoles of [Co(H2O)4Cl2]Cl?
Answer» How many O-atoms are present in $\frac{3}{8}$ millimoles of $[C o (H_{2} O)_{4} C l_{2}] C l$ ?

Discussion

33.	Ether is more volatile than alcohol having same molecular formula. This is due to:
Answer» Ether is more volatile than alcohol having same molecular formula. This is due to:

Discussion

34.	What is the difference between orbital and orbit?Explain detailed.
Answer» What is the difference between orbital and orbit? Explain detailed.

Discussion

35.	An isomer of ethanol is:
Answer» An isomer of ethanol is:

Discussion

36.	5.In a flask colourless N2O4 is in equilibrium with brown coloured NO2 at equilibrium when the flask is heated at 100 degree the brown coloured deepens and on cooling it becomes less coloured.what is delta H for for formation of NO2 and why? 1) negative 2) positive 3) zero 4) undefined
Answer» 5.In a flask colourless N2O4 is in equilibrium with brown coloured NO2 at equilibrium when the flask is heated at 100 degree the brown coloured deepens and on cooling it becomes less coloured.what is delta H for for formation of NO2 and why? 1) negative 2) positive 3) zero 4) undefined

Discussion

37.	Several sodium compounds find use in industries. Which of the following compounds are used for textile industry? 9 a) Na2CO3 (b) NaHCO3 (c) NaOH (d) NaCl
Answer» Several sodium compounds find use in industries. Which of the following compounds are used for textile industry? 9 a) $N a_{2} C O_{3}$ (b) $N a H C O_{3}$ (c) NaOH (d) NaCl

Discussion

38.	how to find out equivalent weight? What is the equivalent weight of hydrogen ?
Answer» how to find out equivalent weight? What is the equivalent weight of hydrogen ?

Discussion

39.	The dissociation constant of 0.05 M CH3COOH is given as 1.8×10−5. Calculate the percentage dissociation of CH3COOH in 0.2 M HCl solution.
Answer» The dissociation constant of $0.05 M C H_{3} C O O H$ is given as $1.8 \times 10^{- 5}$ . Calculate the percentage dissociation of $C H_{3} C O O H$ in $0.2 M H C l$ solution.

Discussion

40.	Hoffmann bromamide degradation reaction is shown by
Answer» Hoffmann bromamide degradation reaction is shown by

Discussion

41.	The polytropic process for an ideal gas is given as PVn=constant. For this process, the expression for the work obtained is:W=P1V1[(V2V1)x−1](y)What is the value of (x+y)?
Answer» The polytropic process for an ideal gas is given as $P V^{n} = constant$ . For this process, the expression for the work obtained is: $W = \frac{P_{1} V_{1} [{(\frac{V_{2}}{V_{1}})}^{x} - 1]}{(y)}$ What is the value of $(x + y)$ ?

Discussion

42.	What is the significance of maximum buffer capacity in the case of weak acid strong base conductometric titration?
Answer» What is the significance of maximum buffer capacity in the case of weak acid strong base conductometric titration?

Discussion

43.	Which of the following cannot undergo hydrolysis:
Answer» Which of the following cannot undergo hydrolysis:

Discussion

44.	why is the order of crystal field splitting C donor>N donor> O donor
Answer» why is the order of crystal field splitting C donor>N donor> O donor

Discussion

45.	In which of the following, resonance will be possible?
Answer» In which of the following, resonance will be possible?

Discussion

46.	Is it correct to say that the polarisibility and covalent bonding increases with increse in hybridisation from sp to sp3d
Answer» Is it correct to say that the polarisibility and covalent bonding increases with increse in hybridisation from sp to sp3d

Discussion

47.	can rate law include catalyst in its reaction
Answer» can rate law include catalyst in its reaction

Discussion

48.	The number of moles present in 24.5 gms of H2SO4 is
Answer» The number of moles present in $24.5 g m s$ of $H_{2} S O_{4}$ is

Discussion

49.	The crystalline solids have definite orderly arrangement of their constituent particles in three dimensions known as lattice. The smallest repeating part in the lattice is known as unit cell. The unit cell are described as simple cubic face centred and body centred unit cell. For the stable ionic crystalline structures, there is definite radius ratio limit for a cation to fit perfectly in the lattice of anions called radius ratio rule. This also defines the coordination number of an ion. (ii) In a cubic lattice ABC, A atom present at all corners except one at corner which is occupied by B atoms. C atoms are present at face centres. The formula of the compound is:
Answer» The crystalline solids have definite orderly arrangement of their constituent particles in three dimensions known as lattice. The smallest repeating part in the lattice is known as unit cell. The unit cell are described as simple cubic face centred and body centred unit cell. For the stable ionic crystalline structures, there is definite radius ratio limit for a cation to fit perfectly in the lattice of anions called radius ratio rule. This also defines the coordination number of an ion. (ii) In a cubic lattice ABC, A atom present at all corners except one at corner which is occupied by B atoms. C atoms are present at face centres. The formula of the compound is:

Discussion

50.	water is oxide of hydrogen explain. water is amphoteric or neutral
Answer» water is oxide of hydrogen explain. water is amphoteric or neutral

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

For the reaction N2(g)+3H2(g)⇌2NH3(g),ΔH=−93.6 kJ mol−1. The concentration of H2 at equilibrium will increase if

9. Phenol dimerises to benzene having van't hoff factor 0.54.what degree of association is

if a molecule has a double bond and a single bond then is it right to say that it has 3 bond pairs.

The structure of (A) is:

Benzene was found to form only one ortho disubstituted product

The radius (r) of the nucleus of an atom is related to { its mass number (A) as r=R_0A^\ast . The value of x is

The wrong statement about the isoelectric point is:

Aqueous solution of Na2SO3 on reaction with Cl2 gives:

Calculate the n-factor of KMnO4?

How to determine whether a salt will precipitate or not among some given salts by seeing their Ksp values ?

What happens when keyltpnes react with aldehydes

A compound does not give a positive test with 2,4-DNP. The compound is:

-|x|>-3 Then |x| is

The compound that will react most readily with gaseous bromine has the formula is :

During the electrolysis of molten sodium chloride, the time required to produce 0.10 mole of chlorine gas using a current of 3 amperes is: (select the approximate ans)

40. A horizontal tube of length l closed at both the ends contain an ideal gas of molecular mass M. The tube is rotated with angular velocity β about a vertical axis passing through an end. If temperature is constant and P1, P2 are pressures at free end and fixed end respectively, then 1) P1

How many significant figures are there in this =0.0125 + 0.7864 + 0.0215

23. Calculate the percentage composition of each element in the pure sample of green vitriol

in NO3_, ion number of bond p air and lone pair ofelectrons on nitrogen atom are(1) 2,2(2) 3, 1(3) 1,3(4) 4, 0

Iodine molecules are held in the crystals lattice by .............. (a) London forces (b) dipole-dipole interacions (c) Covalent bonds (d) coulombic forces

Sort the following in decreasing order of their magnetic moments.

13Al27 is a stable isotope. 13Al29 is expected to disintegrate by :

31 At what conc. of solute 'P' the solution will be isotonic with a 5% solution of urea? (Molecular mass of P=342g/mol)

92 5 moles of solvent A formed ideal solution when mixed with 10 moles of solvent B at a particular temperature .if the vapour pressure of pure A and B be 220 mm of Hg and 550mm of Hg at that temperature find the vapour pressure of the mixture .

what is resonance? what is conjugation?

Oxygen atom of ether is:

For a given chemical reaction A→B at 300 K the free energy change is −49.4kJmol−1 and the enthalpy of reaction is 51.4kJmol−1. The entropy change of the reaction is _____JK−1mol−1.

11. What is the difference betweem freundilich adsorption curve and langumir adsorption curve?

Q. A chips manufacturing company needs nitrogen for food preservation and packaging? Help them by suggesting the steps to obtain nitrogen from air.

R(alkyl) should not be:

Which of the following best describes solids?

How many O-atoms are present in 38 millimoles of [Co(H2O)4Cl2]Cl?

Ether is more volatile than alcohol having same molecular formula. This is due to:

What is the difference between orbital and orbit?Explain detailed.

An isomer of ethanol is:

5.In a flask colourless N2O4 is in equilibrium with brown coloured NO2 at equilibrium when the flask is heated at 100 degree the brown coloured deepens and on cooling it becomes less coloured.what is delta H for for formation of NO2 and why? 1) negative 2) positive 3) zero 4) undefined

Several sodium compounds find use in industries. Which of the following compounds are used for textile industry? 9 a) Na2CO3 (b) NaHCO3 (c) NaOH (d) NaCl

how to find out equivalent weight? What is the equivalent weight of hydrogen ?

The dissociation constant of 0.05 M CH3COOH is given as 1.8×10−5. Calculate the percentage dissociation of CH3COOH in 0.2 M HCl solution.

Hoffmann bromamide degradation reaction is shown by

The polytropic process for an ideal gas is given as PVn=constant. For this process, the expression for the work obtained is:W=P1V1[(V2V1)x−1](y)What is the value of (x+y)?

What is the significance of maximum buffer capacity in the case of weak acid strong base conductometric titration?

Which of the following cannot undergo hydrolysis:

why is the order of crystal field splitting C donor>N donor> O donor

In which of the following, resonance will be possible?

Is it correct to say that the polarisibility and covalent bonding increases with increse in hybridisation from sp to sp3d

can rate law include catalyst in its reaction

The number of moles present in 24.5 gms of H2SO4 is

water is oxide of hydrogen explain. water is amphoteric or neutral