46295 + Interview Questions in Chemistry

1.	The ionisation energy and electron affinity of an element are 13 eV and 3.8 eV respectively. Find the electronegativity of this element on Pauling's scale.
Answer» The ionisation energy and electron affinity of an element are $13 e V$ and $3.8 e V$ respectively. Find the electronegativity of this element on Pauling's scale.

Discussion

2.	Acc. to the given reaction, mass of sucrose produced by mixing 84 g of carbon, 12 g of hydrogen and 56 litres of o2 at 1 atm and 273k is-C+H2+O2 -> C12H22O11
Answer» Acc. to the given reaction, mass of sucrose produced by mixing 84 g of carbon, 12 g of hydrogen and 56 litres of o2 at 1 atm and 273k is- C+H2+O2 -> C12H22O11

Discussion

3.	"The formal charge is factor based on a pure covalent view of bonding in which electron pairs are shared equally by nieghbouring atoms" - what is the meaning of this statement ?
Answer» "The formal charge is factor based on a pure covalent view of bonding in which electron pairs are shared equally by nieghbouring atoms" - what is the meaning of this statement ?

Discussion

4.	The vapour pressure of pure water is 760 mm at 25^°C. The vapour pressure of solution containing 1molal solution of glucose will be ?
Answer» The vapour pressure of pure water is 760 mm at 25^°C. The vapour pressure of solution containing 1molal solution of glucose will be ?

Discussion

5.	why we have to differentiate again if we have a function inside?
Answer» why we have to differentiate again if we have a function inside?

Discussion

6.	In a first order reaction, 75% of the reactants disappeared in 1.386 hr. The value of the rate constant is :
Answer» In a first order reaction, $75 %$ of the reactants disappeared in $1.386 h r$ . The value of the rate constant is :

Discussion

7.	How to convert ethane to bromoethane
Answer» How to convert ethane to bromoethane

Discussion

8.	The value of 2nd excitation energy of a single electron species is 'x' e V. Find its ionization energy: 1 . x/8 2 . 4x/8 3 . 9x/8 4 . None
Answer» The value of 2nd excitation energy of a single electron species is 'x' e V. Find its ionization energy: 1 . x/8 2 . 4x/8 3 . 9x/8 4 . None

Discussion

9.	A glass rod was rubbed with silk and was found to have +5μC of charge. How many electrons got transferred and from which material?
Answer» A glass rod was rubbed with silk and was found to have +5 $μ$ C of charge. How many electrons got transferred and from which material?

Discussion

10.	30. The ph of a solution is increased from 3 to 6 , its H+ concentration will be (a) reduced to half B). Doubled C) reduced by 1000 times D) increased by 1000 times
Answer» 30. The ph of a solution is increased from 3 to 6 , its H+ concentration will be (a) reduced to half B). Doubled C) reduced by 1000 times D) increased by 1000 times

Discussion

11.	How to remember sandmeyers reaction
Answer» How to remember sandmeyers reaction

Discussion

12.	Theconductivity of sodium chloride at 298 K has been determined atdifferent concentrations and the results are given below:Concentration/M 0.001 0.010 0.020 0.050 0.100102× κ/S m−1 1.237 11.85 23.15 55.53 106.74Calculatefor all concentrations and draw aplot between andc½. Find the value of.
Answer» The conductivity of sodium chloride at 298 K has been determined at different concentrations and the results are given below: Concentration/M 0.001 0.010 0.020 0.050 0.100 10² × κ/S m⁻¹ 1.237 11.85 23.15 55.53 106.74 Calculate for all concentrations and draw a plot between and c½. Find the value of.

12.

Theconductivity of sodium chloride at 298 K has been determined atdifferent concentrations and the results are given below:Concentration/M 0.001 0.010 0.020 0.050 0.100102× κ/S m−1 1.237 11.85 23.15 55.53 106.74Calculatefor all concentrations and draw aplot between andc½. Find the value of.

Answer»

The
conductivity of sodium chloride at 298 K has been determined at
different concentrations and the results are given below:

Concentration/M
0.001 0.010 0.020 0.050 0.100

10²
× κ/S m⁻¹
1.237 11.85 23.15 55.53 106.74

Calculate
for all concentrations and draw a
plot between
and
c½. Find the value of.

Discussion

13.	law of multiple proportions
Answer» law of multiple proportions

Discussion

14.	de briglie wavelength associated with an electron revolving in the nth state if hydrogen atom is directly proportional t
Answer» de briglie wavelength associated with an electron revolving in the nth state if hydrogen atom is directly proportional t

Discussion

15.	If we plot a graph of radiation against the stopping potential of photoelectron, its slope would be equal to
Answer» If we plot a graph of radiation against the stopping potential of photoelectron, its slope would be equal to

Discussion

16.	Explain the difference between tetrahedral void and octahedral void?
Answer» Explain the difference between tetrahedral void and octahedral void?

Discussion

17.	why zero order reactions are never elementary reactions
Answer» why zero order reactions are never elementary reactions

Discussion

18.	Find the number of quanta of radiations of frequency 5.03×1013 s−1 that must be absorbed in order to melt 5 g of ice. The energy required to melt 1 g of ice is 333 J.
Answer» Find the number of quanta of radiations of frequency $5.03 \times 10^{13} s^{- 1}$ that must be absorbed in order to melt 5 g of ice. The energy required to melt 1 g of ice is 333 J.

Discussion

19.	which carbohydrates does not show mutarotation?
Answer» which carbohydrates does not show mutarotation?

Discussion

20.	The conductivity of 0.01 mol/dm3 aqueous acetic acid at 300 K is 19.5×10−5 ohm−1 cm−1 and the maximum limiting molar conductivity of acetic acid at the same temperature is 390 ohm−1 cm2mol−1. The degree of dissociation of acetic acid is:
Answer» The conductivity of $0.01 {mol/dm}^{3}$ aqueous acetic acid at $300 K is 19.5 \times 10^{- 5} {ohm}^{- 1} {cm}^{- 1}$ and the maximum limiting molar conductivity of acetic acid at the same temperature is $390 {ohm}^{- 1} {cm}^{2} {mol}^{- 1}$ . The degree of dissociation of acetic acid is:

Discussion

21.	45. Mg2C3 + H2O-----> (A) The product (A) is a/an (1) Terminal alkyne (2) Non-terminal alkyne (3) Alkene (4) Alkane
Answer» 45. Mg2C3 + H2O-----> (A) The product (A) is a/an (1) Terminal alkyne (2) Non-terminal alkyne (3) Alkene (4) Alkane

Discussion

22.	From which of the following species, it is easiest to remove one electron?
Answer» From which of the following species, it is easiest to remove one electron?

Discussion

23.	If atom is stable, then why electron revovle around nucleus and how do electron get energy to revovle?
Answer» If atom is stable, then why electron revovle around nucleus and how do electron get energy to revovle?

Discussion

24.	The potential of standard hydrogen electrode is zero. This implies that
Answer» The potential of standard hydrogen electrode is zero. This implies that

Discussion

25.	How many H atoms can be exchanged by deuterium when the shown compound is kept with OD−/D2O?
Answer» How many $H$ atoms can be exchanged by deuterium when the shown compound is kept with $O D^{-} / D_{2} O$ ?

Discussion

26.	if the ratio of coordination no. of A to that of B is x:y, then the ratio of no. of atoms of A to that no. of atom B i unit cell i
Answer» if the ratio of coordination no. of A to that of B is x:y, then the ratio of no. of atoms of A to that no. of atom B i unit cell i

Discussion

27.	10 How does the two H atoms bounded directly to P atom in H3PO2 impart reducing character to the acid CONCEPTUALLY? How can they be reducing if they are non ionizable?
Answer» 10 How does the two H atoms bounded directly to P atom in H3PO2 impart reducing character to the acid CONCEPTUALLY? How can they be reducing if they are non ionizable?

Discussion

28.	37. Which of the following is most reactive toward electrophilic aromatic substitution for halogen toulene or nitrobenzene
Answer» 37. Which of the following is most reactive toward electrophilic aromatic substitution for halogen toulene or nitrobenzene

Discussion

29.	Among 3d transition series the ionization enthalpy:
Answer» Among 3d transition series the ionization enthalpy:

Discussion

30.	A given element A has a face centred unit cell in which A is absent from two of the corners.The packing fraction is :
Answer» A given element A has a face centred unit cell in which A is absent from two of the corners. The packing fraction is :

Discussion

31.	When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide solution, the ratio of volumes of hydrogen evolved is
Answer» When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide solution, the ratio of volumes of hydrogen evolved is

Discussion

32.	The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is ____ BM.
Answer» The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is ____ BM .

Discussion

33.	perform the conversion of pent-3-en-2-ol to pent-3-en-2-one
Answer» perform the conversion of pent-3-en-2-ol to pent-3-en-2-one

Discussion

34.	At 273 K, the density of a gaseous oxide at 2 bar is same as that of nitrogen at 5 bar. Calculate the molar mass of oxide.
Answer» At 273 K, the density of a gaseous oxide at 2 bar is same as that of nitrogen at 5 bar. Calculate the molar mass of oxide.

Discussion

35.	A nucleus disintegrates into two daughter nuclei with masses in the ratio 1:26 if radius of the parent nucleus is r, radius of the lighter daughter nucleus is
Answer» A nucleus disintegrates into two daughter nuclei with masses in the ratio 1:26 if radius of the parent nucleus is r, radius of the lighter daughter nucleus is

Discussion

36.	Given that EoO2/H2O=+1.23V;EoS2O2−8/SO2−4=2.05VEoBr2/Br−=+1.09VEoAu3+/Au=+1.4VThe strongest oxidising agent is:
Answer» Given that $E_{O_{2} / H_{2} O}^{o} = + 1.23 V;$ $E_{S_{2} O_{8}^{2 -} / S O_{4}^{2 -}}^{o} = 2.05 V$ $E_{B r_{2} / B r^{-}}^{o} = + 1.09 V$ $E_{A u^{3 +} / A u}^{o} = + 1.4 V$ The strongest oxidising agent is:

Discussion

37.	19. 3-methyl pent2ene -{O3/H2O-Zn}->A+B. When the mixture of A and B is treated with dil.NaOH how many aldols can be formed?
Answer» 19. 3-methyl pent2ene -{O3/H2O-Zn}->A+B. When the mixture of A and B is treated with dil.NaOH how many aldols can be formed?

Discussion

38.	Which of the following is the cell representation for the given cell reaction? Zn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s)
Answer» Which of the following is the cell representation for the given cell reaction? $Z n (s) + C u^{2 +} (a q) \to Z n^{2 +} (a q) + C u (s)$

Discussion

39.	29.Why are the melting and boiling points of group 14 elements higher than the corresponding group 13 elements?
Answer» 29.Why are the melting and boiling points of group 14 elements higher than the corresponding group 13 elements?

Discussion

40.	Two oxides of a metal contain 27.6% and 30.0% of Oxygen, respectively. If the formula of the first be M3O4. Find that of the second.
Answer» Two oxides of a metal contain $27.6 % a n d 30.0 %$ of Oxygen, respectively. If the formula of the first be $M_{3}$ $O_{4}$ . Find that of the second.

Discussion

41.	A solution containing 10 g dm−3 of urea (Molecular weight 60 g/mol) is isotonic with a 5% (w/V) solution of a non - volatile solute at the same temperature. The molecular mass of this non volatile solute is :
Answer» A solution containing $10 g d m^{- 3}$ of urea (Molecular weight 60 g/mol) is isotonic with a $5 % (w / V)$ solution of a non - volatile solute at the same temperature. The molecular mass of this non volatile solute is :

Discussion

42.	what is the n-factor of H2O2 in dispropertionation reaction
Answer» what is the n-factor of H2O2 in dispropertionation reaction

Discussion

43.	Which of the following group contain mostly radioactive elements ?
Answer» Which of the following group contain mostly radioactive elements ?

Discussion

44.	If 2M, 1L solution of acetic acid is added to 3M, 1L etthyl alcohol then following elementary reaction takes place: CH3COOH+C2H5OH==>CH3COOC2H5+H2O If each solution is diluted by 1 litre, then initial rate become how many times? 1) 4 2) 2 3) 0.5 4) 0.25
Answer» If 2M, 1L solution of acetic acid is added to 3M, 1L etthyl alcohol then following elementary reaction takes place: CH3COOH+C2H5OH==>CH3COOC2H5+H2O If each solution is diluted by 1 litre, then initial rate become how many times? 1) 4 2) 2 3) 0.5 4) 0.25

Discussion

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

Discussion

46.	the ionic radii of A^+and b ions are 0.98×10^{-10} mand 1.81×10^{-10} m.the coordination no of each ion in AB is
Answer» the ionic radii of A^+and b ions are 0.98×10^{-10} mand 1.81×10^{-10} m.the coordination no of each ion in AB is

Discussion

47.	The hydrated salt Na2SO4 xH2O under goes 55% loss in weight on heating and become anhydrous .The value of x will be
Answer» The hydrated salt Na2SO4 xH2O under goes 55% loss in weight on heating and become anhydrous .The value of x will be

Discussion

48.	What are collateral fibre present at the nodes of Ranvir
Answer» What are collateral fibre present at the nodes of Ranvir

Discussion

49.	At low pressure, the van der waal's equation is written as (P+ a/V^2)V=RT . Then compressibility factor is then equal to :-
Answer» At low pressure, the van der waal's equation is written as (P+ a/V^2)V=RT . Then compressibility factor is then equal to :-

Discussion

50.	The molecular mass of benzoic acid in benzene, as determined by depression in freezing point method, corresponds to:
Answer» The molecular mass of benzoic acid in benzene, as determined by depression in freezing point method, corresponds to:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The ionisation energy and electron affinity of an element are 13 eV and 3.8 eV respectively. Find the electronegativity of this element on Pauling's scale.

Acc. to the given reaction, mass of sucrose produced by mixing 84 g of carbon, 12 g of hydrogen and 56 litres of o2 at 1 atm and 273k is-C+H2+O2 -> C12H22O11

"The formal charge is factor based on a pure covalent view of bonding in which electron pairs are shared equally by nieghbouring atoms" - what is the meaning of this statement ?

The vapour pressure of pure water is 760 mm at 25^°C. The vapour pressure of solution containing 1molal solution of glucose will be ?

why we have to differentiate again if we have a function inside?

In a first order reaction, 75% of the reactants disappeared in 1.386 hr. The value of the rate constant is :

How to convert ethane to bromoethane

The value of 2nd excitation energy of a single electron species is 'x' e V. Find its ionization energy: 1 . x/8 2 . 4x/8 3 . 9x/8 4 . None

A glass rod was rubbed with silk and was found to have +5μC of charge. How many electrons got transferred and from which material?

30. The ph of a solution is increased from 3 to 6 , its H+ concentration will be (a) reduced to half B). Doubled C) reduced by 1000 times D) increased by 1000 times

How to remember sandmeyers reaction

Theconductivity of sodium chloride at 298 K has been determined atdifferent concentrations and the results are given below:Concentration/M 0.001 0.010 0.020 0.050 0.100102× κ/S m−1 1.237 11.85 23.15 55.53 106.74Calculatefor all concentrations and draw aplot between andc½. Find the value of.

law of multiple proportions

de briglie wavelength associated with an electron revolving in the nth state if hydrogen atom is directly proportional t

If we plot a graph of radiation against the stopping potential of photoelectron, its slope would be equal to

Explain the difference between tetrahedral void and octahedral void?

why zero order reactions are never elementary reactions

Find the number of quanta of radiations of frequency 5.03×1013 s−1 that must be absorbed in order to melt 5 g of ice. The energy required to melt 1 g of ice is 333 J.

which carbohydrates does not show mutarotation?

The conductivity of 0.01 mol/dm3 aqueous acetic acid at 300 K is 19.5×10−5 ohm−1 cm−1 and the maximum limiting molar conductivity of acetic acid at the same temperature is 390 ohm−1 cm2mol−1. The degree of dissociation of acetic acid is:

45. Mg2C3 + H2O-----> (A) The product (A) is a/an (1) Terminal alkyne (2) Non-terminal alkyne (3) Alkene (4) Alkane

From which of the following species, it is easiest to remove one electron?

If atom is stable, then why electron revovle around nucleus and how do electron get energy to revovle?

The potential of standard hydrogen electrode is zero. This implies that

How many H atoms can be exchanged by deuterium when the shown compound is kept with OD−/D2O?

if the ratio of coordination no. of A to that of B is x:y, then the ratio of no. of atoms of A to that no. of atom B i unit cell i

10 How does the two H atoms bounded directly to P atom in H3PO2 impart reducing character to the acid CONCEPTUALLY? How can they be reducing if they are non ionizable?

37. Which of the following is most reactive toward electrophilic aromatic substitution for halogen toulene or nitrobenzene

Among 3d transition series the ionization enthalpy:

A given element A has a face centred unit cell in which A is absent from two of the corners.The packing fraction is :

When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide solution, the ratio of volumes of hydrogen evolved is

The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is ____ BM.

perform the conversion of pent-3-en-2-ol to pent-3-en-2-one

At 273 K, the density of a gaseous oxide at 2 bar is same as that of nitrogen at 5 bar. Calculate the molar mass of oxide.

A nucleus disintegrates into two daughter nuclei with masses in the ratio 1:26 if radius of the parent nucleus is r, radius of the lighter daughter nucleus is

Given that EoO2/H2O=+1.23V;EoS2O2−8/SO2−4=2.05VEoBr2/Br−=+1.09VEoAu3+/Au=+1.4VThe strongest oxidising agent is:

19. 3-methyl pent2ene -{O3/H2O-Zn}->A+B. When the mixture of A and B is treated with dil.NaOH how many aldols can be formed?

Which of the following is the cell representation for the given cell reaction? Zn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s)

29.Why are the melting and boiling points of group 14 elements higher than the corresponding group 13 elements?

Two oxides of a metal contain 27.6% and 30.0% of Oxygen, respectively. If the formula of the first be M3O4. Find that of the second.

A solution containing 10 g dm−3 of urea (Molecular weight 60 g/mol) is isotonic with a 5% (w/V) solution of a non - volatile solute at the same temperature. The molecular mass of this non volatile solute is :

what is the n-factor of H2O2 in dispropertionation reaction

Which of the following group contain mostly radioactive elements ?

If 2M, 1L solution of acetic acid is added to 3M, 1L etthyl alcohol then following elementary reaction takes place: CH3COOH+C2H5OH==>CH3COOC2H5+H2O If each solution is diluted by 1 litre, then initial rate become how many times? 1) 4 2) 2 3) 0.5 4) 0.25

Which of the following is not a transition element?

the ionic radii of A^+and b ions are 0.98×10^{-10} mand 1.81×10^{-10} m.the coordination no of each ion in AB is

The hydrated salt Na2SO4 xH2O under goes 55% loss in weight on heating and become anhydrous .The value of x will be

What are collateral fibre present at the nodes of Ranvir

At low pressure, the van der waal's equation is written as (P+ a/V^2)V=RT . Then compressibility factor is then equal to :-

The molecular mass of benzoic acid in benzene, as determined by depression in freezing point method, corresponds to: