46295 + Interview Questions in Chemistry Page 1 InterviewSolution

1.	33 If the molality of the aqueous solution is 0.111 then the mole fraction of solute will be
Answer» 33 If the molality of the aqueous solution is 0.111 then the mole fraction of solute will be

Discussion

2.	Water lost through transpiration is in the form of water vapor. Hence, it is pure water.
Answer» Water lost through transpiration is in the form of water vapor. Hence, it is pure water.

Discussion

3.	when one mol of oxalic acid is treated wih excess NAOH in dil aq solution ,108 KJ of heat liberated ,then the enthalpy of ionisation of the oxalic acid is (H+OH=H2O)△ H=57.3KJ/mol
Answer» when one mol of oxalic acid is treated wih excess NAOH in dil aq solution ,108 KJ of heat liberated ,then the enthalpy of ionisation of the oxalic acid is (H+OH=H2O)△ H=57.3KJ/mol

Discussion

4.	what is plorized by refrection?
Answer» what is plorized by refrection?

Discussion

5.	42. in an atom 2K,8L,8M,2N electrons are present if m=0,s=0.5, then find number of such electron a.6 b.2 c.8d.16
Answer» 42. in an atom 2K,8L,8M,2N electrons are present if m=0,s=0.5, then find number of such electron a.6 b.2 c.8d.16

Discussion

6.	For the reaction, PCl3 (g) + Cl2 (g) = PCl5 (g) , ∆H = -x KJ If the ∆ Hf°PCl3 is -y KJ, what is ∆Hf°PCl5?
Answer» For the reaction, PCl3 (g) + Cl2 (g) = PCl5 (g) , ∆H = -x KJ If the ∆ Hf°PCl3 is -y KJ, what is ∆Hf°PCl5?

Discussion

7.	63. The edge length of FCC cell is 508pm.If radius of action is 110pm ,what will be radius of anion and also describes the two dimensional lattices and three dimensional primitive unit cells
Answer» 63. The edge length of FCC cell is 508pm.If radius of action is 110pm ,what will be radius of anion and also describes the two dimensional lattices and three dimensional primitive unit cells

Discussion

8.	45. Assertion:In dichromate ion, Size of Cr atom is nearly Tl Reason: All Cr-O bond length in dichromate ion are equal. A)A and R are correct, and R is the correct explaination of A b)A and R are correct but Ris not a correct explaination of A c)A is correct but R is not correct d)Both A and R are not correct
Answer» 45. Assertion:In dichromate ion, Size of Cr atom is nearly Tl Reason: All Cr-O bond length in dichromate ion are equal. A)A and R are correct, and R is the correct explaination of A b)A and R are correct but Ris not a correct explaination of A c)A is correct but R is not correct d)Both A and R are not correct

Discussion

9.	1 mole of a gas is changed from its initial value (15L,2atm) to final state (4L,10atm) respectively. If the change can be represented by a straight line in P-V curve. Calculate the maximum temperature attained by the gas.
Answer» 1 mole of a gas is changed from its initial value (15L,2atm) to final state (4L,10atm) respectively. If the change can be represented by a straight line in P-V curve. Calculate the maximum temperature attained by the gas.

Discussion

10.	The angular momentum of the allowed orbits in a H− like species is integral multiple of:
Answer» The angular momentum of the allowed orbits in a $H -$ like species is integral multiple of:

Discussion

11.	The ratio of SI unit of work to its CGS unit is?
Answer» The ratio of SI unit of work to its CGS unit is?

Discussion

12.	54. Hydrochloric acid is 38% by mass. If the density of solution is 1.19gm cm-3, then what will be the minority of solution?
Answer» 54. Hydrochloric acid is 38% by mass. If the density of solution is 1.19gm cm-3, then what will be the minority of solution?

Discussion

13.	Which of the following is the strongest acid ?
Answer» Which of the following is the strongest acid ?

Discussion

14.	The osmotic pressure of a solution containing 9.2g of a substances (molar mass =176) in 302 ml of solution was found to be 4.1 atmosphere at 15.5 degree Celsius calculate the value of solution content
Answer» The osmotic pressure of a solution containing 9.2g of a substances (molar mass =176) in 302 ml of solution was found to be 4.1 atmosphere at 15.5 degree Celsius calculate the value of solution content

Discussion

15.	Which of the following is correct as the cause of stability of completely filled and Half-filled sub-shells?
Answer» Which of the following is correct as the cause of stability of completely filled and Half-filled sub-shells?

Discussion

16.	The first three spectral lines of H−atom in the Balmer series are given λ1,λ2,λ3 considering the Bohr atomic model, the ratio of wavelengths of first and third spectral lines (λ1λ3) are related by a factor of approximately ′x′×10−1. The value of x, to the nearest integer, is .
Answer» The first three spectral lines of $H -$ atom in the Balmer series are given $λ_{1}, λ_{2}, λ_{3}$ considering the Bohr atomic model, the ratio of wavelengths of first and third spectral lines $(\frac{λ_{1}}{λ_{3}})$ are related by a factor of approximately $^{'} x^{'} \times 10^{- 1}$ . The value of $x$ , to the nearest integer, is .

Discussion

17.	An elephant weighs 3000 N. Find the pressure exerted by the elephant on the ground ifeach of its feet measures 100 cm2A box has sides 10 cm, 20 cm and 15 cm. If its weight is 5 N, find the pressure exerted by the box when it is placed on its (i) largest face and (ii) smallest face.
Answer» An elephant weighs 3000 N. Find the pressure exerted by the elephant on the ground if each of its feet measures 100 cm2 A box has sides 10 cm, 20 cm and 15 cm. If its weight is 5 N, find the pressure exerted by the box when it is placed on its (i) largest face and (ii) smallest face.

Discussion

18.	What happens if factors in column A are increased?ABA) Cation sizeI)More CovalentB) Cation chargeII) Less ionicC) Anion SizeIII) More CovalentD) Anion ChargeIV) More ionic
Answer» What happens if factors in column A are increased? $\begin{matrix} A & B A) Cation size & I) More Covalent B) Cation charge & II) Less ionic C) Anion Size & III) More Covalent D) Anion Charge & IV) More ionic \end{matrix}$

18.

What happens if factors in column A are increased?ABA) Cation sizeI)More CovalentB) Cation chargeII) Less ionicC) Anion SizeIII) More CovalentD) Anion ChargeIV) More ionic

Answer»

What happens if factors in column A are increased?

$\begin{matrix} A & B A) Cation size & I) More Covalent B) Cation charge & II) Less ionic C) Anion Size & III) More Covalent D) Anion Charge & IV) More ionic \end{matrix}$

Discussion

19.	The elemental analysis of an organic compound containing C, H and O gives the percentage compositions of C and H to be 39.9% and 6.7% respectively. If the molecular weight of the compound is 180 u, then the number of carbon atoms present in the molecule is:
Answer» The elemental analysis of an organic compound containing $C, H and O$ gives the percentage compositions of $C$ and $H$ to be $39.9 %$ and $6.7 %$ respectively. If the molecular weight of the compound is $180 u$ , then the number of carbon atoms present in the molecule is:

Discussion

20.	To synthesize the unsymmetrical alkyne the reagents needed would be
Answer» To synthesize the unsymmetrical alkyne the reagents needed would be

20.

To synthesize the unsymmetrical alkyne the reagents needed would be

Answer»

To synthesize the unsymmetrical alkyne

the reagents needed would be

Discussion

21.	Out of the following, how many compounds on hydrogenation will produce optically inactive compounds:
Answer» Out of the following, how many compounds on hydrogenation will produce optically inactive compounds:

Discussion

22.	32. Why does the vapour pressure of a liquid decrease when it is present in a mixture ?
Answer» 32. Why does the vapour pressure of a liquid decrease when it is present in a mixture ?

Discussion

23.	2019/8/5 07:18A cylinder containing H,0() at 25^° C recorded apressure of 500 torr. The volume of cylinder isreduced to half by forcing the piston downward atthe same temperature; the pressure reading wouldbe (Aq.Tension= 23 torr)10.(A) 977 torr(B) 1000 torr(C) 1100 torr(D) 1023 torr
Answer» 2019/8/5 07:18A cylinder containing H,0() at 25^° C recorded apressure of 500 torr. The volume of cylinder isreduced to half by forcing the piston downward atthe same temperature; the pressure reading wouldbe (Aq.Tension= 23 torr)10.(A) 977 torr(B) 1000 torr(C) 1100 torr(D) 1023 torr

Discussion

24.	In a hydrogen atom, following the Bohr's postulate, the product of linear momentum and angular momentum is proportional to nx where n is the orbit number. Then x is
Answer» In a hydrogen atom, following the Bohr's postulate, the product of linear momentum and angular momentum is proportional to $n^{x}$ where $n$ is the orbit number. Then $x$ is

Discussion

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

Discussion

26.	The coordination number of Cs+ in CsCl structure is:
Answer» The coordination number of $C s^{+}$ in $C s C l$ structure is:

Discussion

27.	74.5g of a metallic chloride contains 35.5g of chlorine. The exact atomic weight of the metal is x and its specific heat is 0.0406 Cal/g°C .What will be the value of x?
Answer» 74.5g of a metallic chloride contains 35.5g of chlorine. The exact atomic weight of the metal is x and its specific heat is 0.0406 Cal/g°C .What will be the value of x?

Discussion

28.	How the followingconversions can be carried out?(i) Propene topropan-1-ol(ii) Ethanol tobut-1-yne(iii) 1-Bromopropane to 2-bromopropane(iv) Toluene tobenzyl alcohol(v) Benzene to4-bromonitrobenzene(vi) Benzylalcohol to 2-phenylethanoic acid(vii) Ethanolto propanenitrile(viii) Anilineto chlorobenzene(ix) 2-Chlorobutane to 3, 4-dimethylhexane(x) 2-Methyl-1-propene to 2-chloro-2-methylpropane(xi) Ethylchloride to propanoic acid(xii) But-1-eneto n-butyliodide(xiii) 2-Chloropropane to 1-propanol(xiv) Isopropylalcohol to iodoform(xv) Chlorobenzene to p-nitrophenol(xvi) 2-Bromopropane to 1-bromopropane(xvii) Chloroethane to butane(xviii) Benzeneto diphenyl(xix) tert-Butylbromide to isobutyl bromide(xx) Aniline tophenylisocyanide
Answer» How the following conversions can be carried out? (i) Propene to propan-1-ol (ii) Ethanol to but-1-yne (iii) 1-Bromopropane to 2-bromopropane (iv) Toluene to benzyl alcohol (v) Benzene to 4-bromonitrobenzene (vi) Benzyl alcohol to 2-phenylethanoic acid (vii) Ethanol to propanenitrile (viii) Aniline to chlorobenzene (ix) 2-Chlorobutane to 3, 4-dimethylhexane (x) 2-Methyl-1-propene to 2-chloro-2-methylpropane (xi) Ethyl chloride to propanoic acid (xii) But-1-ene to n-butyliodide (xiii) 2-Chloropropane to 1-propanol (xiv) Isopropyl alcohol to iodoform (xv) Chlorobenzene to p-nitrophenol (xvi) 2-Bromopropane to 1-bromopropane (xvii) Chloroethane to butane (xviii) Benzene to diphenyl (xix) tert-Butyl bromide to isobutyl bromide (xx) Aniline to phenylisocyanide

28.

How the followingconversions can be carried out?(i) Propene topropan-1-ol(ii) Ethanol tobut-1-yne(iii) 1-Bromopropane to 2-bromopropane(iv) Toluene tobenzyl alcohol(v) Benzene to4-bromonitrobenzene(vi) Benzylalcohol to 2-phenylethanoic acid(vii) Ethanolto propanenitrile(viii) Anilineto chlorobenzene(ix) 2-Chlorobutane to 3, 4-dimethylhexane(x) 2-Methyl-1-propene to 2-chloro-2-methylpropane(xi) Ethylchloride to propanoic acid(xii) But-1-eneto n-butyliodide(xiii) 2-Chloropropane to 1-propanol(xiv) Isopropylalcohol to iodoform(xv) Chlorobenzene to p-nitrophenol(xvi) 2-Bromopropane to 1-bromopropane(xvii) Chloroethane to butane(xviii) Benzeneto diphenyl(xix) tert-Butylbromide to isobutyl bromide(xx) Aniline tophenylisocyanide

Answer»

How the following
conversions can be carried out?

(i) Propene to
propan-1-ol

(ii) Ethanol to
but-1-yne

(iii)
1-Bromopropane to 2-bromopropane

(iv) Toluene to
benzyl alcohol

(v) Benzene to
4-bromonitrobenzene

(vi) Benzyl
alcohol to 2-phenylethanoic acid

(vii) Ethanol
to propanenitrile

(viii) Aniline
to chlorobenzene

(ix)
2-Chlorobutane to 3, 4-dimethylhexane

(x)
2-Methyl-1-propene to 2-chloro-2-methylpropane

(xi) Ethyl
chloride to propanoic acid

(xii) But-1-ene
to n-butyliodide

(xiii)
2-Chloropropane to 1-propanol

(xiv) Isopropyl
alcohol to iodoform

(xv)
Chlorobenzene to p-nitrophenol

(xvi)
2-Bromopropane to 1-bromopropane

(xvii)
Chloroethane to butane

(xviii) Benzene
to diphenyl

(xix) tert-Butyl
bromide to isobutyl bromide

(xx) Aniline to
phenylisocyanide

Discussion

29.	33. atom A present in ccp from atom B are present in all octahedral void and atom c is presnt in all tetrahedral void if one of the body diagonal is removes all rouching particle find impirical formula of solid
Answer» 33. atom A present in ccp from atom B are present in all octahedral void and atom c is presnt in all tetrahedral void if one of the body diagonal is removes all rouching particle find impirical formula of solid

Discussion

30.	Explain the characteristics of synthetic fibres in detail.
Answer» Explain the characteristics of synthetic fibres in detail.

Discussion

31.	On a sunday morning Paheli's friend visited her home. She wanted to see some flowering plants in the nearby garden. Both of them went to the garden. While returning from the garden they also observed some flowering plants on the road side. But to their surprise they found that the leaves were comparatively dull.Can you help them to know why?
Answer» On a sunday morning Paheli's friend visited her home. She wanted to see some flowering plants in the nearby garden. Both of them went to the garden. While returning from the garden they also observed some flowering plants on the road side. But to their surprise they found that the leaves were comparatively dull. Can you help them to know why?

Discussion

32.	Which of the following is not a redox reaction?
Answer» Which of the following is not a redox reaction?

Discussion

33.	The sketch shows the plot of Z vs P for 1 mole of a hypothetical gas at three distincttemperatures:Boyle's temperature is the temperature at which a gas shows ideal behaviour over apressure range in the low pressure region. Boyle's temperature (Tb)=aRb. If a plot isobtained at temperatures well below Boyle's temperature, then the curve will show a negative deviation in the low pressure region and a positive deviation in the high pressureregion. In the first figure, in the plot at 500 K,Z changes from 2 to 2.2 as the pressure varies from 1000 atm to 1200 atm (high pressure). The value of bRT will be:
Answer» The sketch shows the plot of Z vs P for 1 mole of a hypothetical gas at three distinct temperatures: Boyle's temperature is the temperature at which a gas shows ideal behaviour over a pressure range in the low pressure region. Boyle's temperature $(T_{b}) = \frac{a}{R b}$ . If a plot is obtained at temperatures well below Boyle's temperature, then the curve will show a negative deviation in the low pressure region and a positive deviation in the high pressure region. In the first figure, in the plot at $500 K, Z$ changes from 2 to 2.2 as the pressure varies from 1000 atm to $1200 atm$ (high pressure). The value of $\frac{b}{R T}$ will be:

Discussion

34.	Why is the enthalpy of neutralization of weak acid less than that of a strong acid
Answer» Why is the enthalpy of neutralization of weak acid less than that of a strong acid

Discussion

35.	Which of the following intermediate is least stable?
Answer» Which of the following intermediate is least stable?

Discussion

36.	A 0.1 N solution of sodium bicarbonate has a pHvalue of(1) 5.6(2) 7.08.4(4) 4.0
Answer» A 0.1 N solution of sodium bicarbonate has a pHvalue of(1) 5.6(2) 7.08.4(4) 4.0

Discussion

37.	The magnitude of standard Gibbs free energy for the given cell reaction in KJmol−1 at 298 K isZn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s),E∘=2 V at 298 K (Faraday′s constant,F=96000 Cmol−1)
Answer» The magnitude of standard Gibbs free energy for the given cell reaction in $K J m o l^{- 1} a t 298 K$ is $Z n (s) + C u^{2 +} (a q) \to Z n^{2 +} (a q) + C u (s), E^{\circ} = 2 V a t 298 K$ $(F a r a d a y^{'} s c o n s t a n t, F = 96000 C m o l^{- 1})$

Discussion

38.	500 ml of a gaseous hydrocarbon when burnt in excess of o2 gave 2.5 lt of co2 and 3lt of h2o vapours under same conditions. molecular formula of the hydrocarbon is ?a)c4h8b)c4h10c)c5h10d)c5h12
Answer» 500 ml of a gaseous hydrocarbon when burnt in excess of o2 gave 2.5 lt of co2 and 3lt of h2o vapours under same conditions. molecular formula of the hydrocarbon is ? a)c4h8 b)c4h10 c)c5h10 d)c5h12

Discussion

39.	If face centred atom contributes one third atom per unit cell then calculate the total number of atoms in FCC unit cell. (correct answer +2, wrong answer -0.5)
Answer» If face centred atom contributes one third atom per unit cell then calculate the total number of atoms in FCC unit cell. (correct answer +2, wrong answer -0.5)

Discussion

40.	What is cine substitution and what is addition elimination reaction?
Answer» What is cine substitution and what is addition elimination reaction?

Discussion

41.	The bulb in the circuit shown does not glow. Can you identify the problem? Suggest necessary changes in the circuit to make the bulb glow.
Answer» The bulb in the circuit shown does not glow. Can you identify the problem? Suggest necessary changes in the circuit to make the bulb glow.

Discussion

42.	The molar freezing point constant for water is 1.86 °C mole-1. If 342 gm of canesugar (C12H22O11) are dissolved in 1000 gm of water, the solution will freeze at
Answer» The molar freezing point constant for water is 1.86 °C mole^-1. If 342 gm of canesugar (C₁₂H₂₂O₁₁) are dissolved in 1000 gm of water, the solution will freeze at

Discussion

43.	Due to schottky defect density and stability decreases but electrical conductivity increases while due to frenkel defect density remains unaffected,stability decreases but electrical conductivity and dielectic cons†an t increases . Give reason
Answer» Due to schottky defect density and stability decreases but electrical conductivity increases while due to frenkel defect density remains unaffected,stability decreases but electrical conductivity and dielectic cons†an t increases . Give reason

Discussion

44.	At 48oC, the vapour pressure of pure CS2 in 850 torr. A solution of 2.0 g of sulphur in 100 g of CS2 has a vapour pressure 844.9 torr. Determine the atomicity of sulphur molecule.
Answer» At $48^{o} C$ , the vapour pressure of pure $C S_{2}$ in $850 torr$ . A solution of $2.0 g$ of sulphur in $100 g$ of $C S_{2}$ has a vapour pressure $844.9 torr$ . Determine the atomicity of sulphur molecule.

Discussion

45.	Total number of hydrogen atoms in ethynyl should be 2 or 1?
Answer» Total number of hydrogen atoms in ethynyl should be 2 or 1?

Discussion

46.	Plot graph between number of molecules vs weight in gram of a substance
Answer» Plot graph between number of molecules vs weight in gram of a substance

Discussion

47.	A container contains SO3 (g) and SO3 (g) can be dissociated into SO2 (g) and O2 (g) . If average molar mass of gaseous mixture is 64 g , then calculate the (%) dissociation of SO3 .
Answer» A container contains SO3 (g) and SO3 (g) can be dissociated into SO2 (g) and O2 (g) . If average molar mass of gaseous mixture is 64 g , then calculate the (%) dissociation of SO3 .

Discussion

48.	22. Why benzene does not show addition reaction?
Answer» 22. Why benzene does not show addition reaction?

Discussion

49.	KBr is 80% dissociated in solution. The freezing point of 0.5 molal solution is:
Answer» KBr is 80% dissociated in solution. The freezing point of 0.5 molal solution is:

Discussion

50.	65. the value of planck's constant is 6.63\ast10^{-34} Js. the speed of light is 3\ast10^{17}nms^{-1} . which value is closest to the wavelength in nm of a quantum of light with frequency of 6\ast10^{15}s^{-1}?
Answer» 65. the value of planck's constant is 6.63\ast10^{-34} Js. the speed of light is 3\ast10^{17}nms^{-1} . which value is closest to the wavelength in nm of a quantum of light with frequency of 6\ast10^{15}s^{-1}?

Discussion

Explore topic-wise InterviewSolutions in .

33 If the molality of the aqueous solution is 0.111 then the mole fraction of solute will be

Water lost through transpiration is in the form of water vapor. Hence, it is pure water.

when one mol of oxalic acid is treated wih excess NAOH in dil aq solution ,108 KJ of heat liberated ,then the enthalpy of ionisation of the oxalic acid is (H+OH=H2O)△ H=57.3KJ/mol

what is plorized by refrection?

42. in an atom 2K,8L,8M,2N electrons are present if m=0,s=0.5, then find number of such electron a.6 b.2 c.8d.16

For the reaction, PCl3 (g) + Cl2 (g) = PCl5 (g) , ∆H = -x KJ If the ∆ Hf°PCl3 is -y KJ, what is ∆Hf°PCl5?

63. The edge length of FCC cell is 508pm.If radius of action is 110pm ,what will be radius of anion and also describes the two dimensional lattices and three dimensional primitive unit cells

1 mole of a gas is changed from its initial value (15L,2atm) to final state (4L,10atm) respectively. If the change can be represented by a straight line in P-V curve. Calculate the maximum temperature attained by the gas.

The angular momentum of the allowed orbits in a H− like species is integral multiple of:

The ratio of SI unit of work to its CGS unit is?

54. Hydrochloric acid is 38% by mass. If the density of solution is 1.19gm cm-3, then what will be the minority of solution?

Which of the following is the strongest acid ?

The osmotic pressure of a solution containing 9.2g of a substances (molar mass =176) in 302 ml of solution was found to be 4.1 atmosphere at 15.5 degree Celsius calculate the value of solution content

Which of the following is correct as the cause of stability of completely filled and Half-filled sub-shells?

The first three spectral lines of H−atom in the Balmer series are given λ1,λ2,λ3 considering the Bohr atomic model, the ratio of wavelengths of first and third spectral lines (λ1λ3) are related by a factor of approximately ′x′×10−1. The value of x, to the nearest integer, is .

An elephant weighs 3000 N. Find the pressure exerted by the elephant on the ground ifeach of its feet measures 100 cm2A box has sides 10 cm, 20 cm and 15 cm. If its weight is 5 N, find the pressure exerted by the box when it is placed on its (i) largest face and (ii) smallest face.

What happens if factors in column A are increased?ABA) Cation sizeI)More CovalentB) Cation chargeII) Less ionicC) Anion SizeIII) More CovalentD) Anion ChargeIV) More ionic

The elemental analysis of an organic compound containing C, H and O gives the percentage compositions of C and H to be 39.9% and 6.7% respectively. If the molecular weight of the compound is 180 u, then the number of carbon atoms present in the molecule is:

To synthesize the unsymmetrical alkyne the reagents needed would be

Out of the following, how many compounds on hydrogenation will produce optically inactive compounds:

32. Why does the vapour pressure of a liquid decrease when it is present in a mixture ?

2019/8/5 07:18A cylinder containing H,0() at 25^° C recorded apressure of 500 torr. The volume of cylinder isreduced to half by forcing the piston downward atthe same temperature; the pressure reading wouldbe (Aq.Tension= 23 torr)10.(A) 977 torr(B) 1000 torr(C) 1100 torr(D) 1023 torr

In a hydrogen atom, following the Bohr's postulate, the product of linear momentum and angular momentum is proportional to nx where n is the orbit number. Then x is

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

The coordination number of Cs+ in CsCl structure is:

74.5g of a metallic chloride contains 35.5g of chlorine. The exact atomic weight of the metal is x and its specific heat is 0.0406 Cal/g°C .What will be the value of x?

33. atom A present in ccp from atom B are present in all octahedral void and atom c is presnt in all tetrahedral void if one of the body diagonal is removes all rouching particle find impirical formula of solid

Explain the characteristics of synthetic fibres in detail.

Which of the following is not a redox reaction?

Why is the enthalpy of neutralization of weak acid less than that of a strong acid

Which of the following intermediate is least stable?

A 0.1 N solution of sodium bicarbonate has a pHvalue of(1) 5.6(2) 7.08.4(4) 4.0

The magnitude of standard Gibbs free energy for the given cell reaction in KJmol−1 at 298 K isZn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s),E∘=2 V at 298 K (Faraday′s constant,F=96000 Cmol−1)

500 ml of a gaseous hydrocarbon when burnt in excess of o2 gave 2.5 lt of co2 and 3lt of h2o vapours under same conditions. molecular formula of the hydrocarbon is ?a)c4h8b)c4h10c)c5h10d)c5h12

If face centred atom contributes one third atom per unit cell then calculate the total number of atoms in FCC unit cell. (correct answer +2, wrong answer -0.5)

What is cine substitution and what is addition elimination reaction?

The bulb in the circuit shown does not glow. Can you identify the problem? Suggest necessary changes in the circuit to make the bulb glow.

The molar freezing point constant for water is 1.86 °C mole-1. If 342 gm of canesugar (C12H22O11) are dissolved in 1000 gm of water, the solution will freeze at

Due to schottky defect density and stability decreases but electrical conductivity increases while due to frenkel defect density remains unaffected,stability decreases but electrical conductivity and dielectic cons†an t increases . Give reason

At 48oC, the vapour pressure of pure CS2 in 850 torr. A solution of 2.0 g of sulphur in 100 g of CS2 has a vapour pressure 844.9 torr. Determine the atomicity of sulphur molecule.

Total number of hydrogen atoms in ethynyl should be 2 or 1?

Plot graph between number of molecules vs weight in gram of a substance

A container contains SO3 (g) and SO3 (g) can be dissociated into SO2 (g) and O2 (g) . If average molar mass of gaseous mixture is 64 g , then calculate the (%) dissociation of SO3 .

22. Why benzene does not show addition reaction?

KBr is 80% dissociated in solution. The freezing point of 0.5 molal solution is:

65. the value of planck's constant is 6.63\ast10^{-34} Js. the speed of light is 3\ast10^{17}nms^{-1} . which value is closest to the wavelength in nm of a quantum of light with frequency of 6\ast10^{15}s^{-1}?