46295 + Interview Questions in Chemistry

1.	51.Electronegavity & electron affinity of an element are X and Y respectively according to mulliken scale, hence ionisation potential of A is - 1) X+Y/2 2) 2X-Y 3) 2Y-X 4) 2X+Y
Answer» 51.Electronegavity & electron affinity of an element are X and Y respectively according to mulliken scale, hence ionisation potential of A is - 1) X+Y/2 2) 2X-Y 3) 2Y-X 4) 2X+Y

Discussion

2.	The correct structural formula of 1,2-Diethyl-1,8-dimethyl-5- propylcyclooctane is :
Answer» The correct structural formula of 1,2-Diethyl-1,8-dimethyl-5- propylcyclooctane is :

Discussion

3.	An unknown compound A has a molecular formula C4H6. When A is treated with an excess of Br2 a new substance B with formula C4H6Br4 is formed. A forms a white precipitate with ammoniacal silver nitrate solution. A may be
Answer» An unknown compound A has a molecular formula C₄H₆. When A is treated with an excess of Br₂ a new substance B with formula C₄H₆Br₄ is formed. A forms a white precipitate with ammoniacal silver nitrate solution. A may be

Discussion

4.	37. Of radius of first Bohr orbit is x, then de Broglie wavelength of electron in 3rd orbit is
Answer» 37. Of radius of first Bohr orbit is x, then de Broglie wavelength of electron in 3rd orbit is

Discussion

5.	which of the following compounds show H bonding chcl3 ch3cl hcl ch3Och3 why do other 3 do not show h bondin
Answer» which of the following compounds show H bonding chcl3 ch3cl hcl ch3Och3 why do other 3 do not show h bondin

Discussion

6.	How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium ?
Answer» How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium ?

Discussion

7.	Total number of degree of unsaturation in compound D is:
Answer» Total number of degree of unsaturation in compound D is:

Discussion

8.	The central atom in OSF4 is
Answer» The central atom in $O S F_{4}$ is

Discussion

9.	The magnitude of difference in oxidation number of ′O′ in OF2 and O2F2 respectively is
Answer» The magnitude of difference in oxidation number of $^{'} O^{'}$ in $O F_{2}$ and $O_{2} F_{2}$ respectively is

Discussion

10.	NiS on reacting with aqua regia gives
Answer» $N i S$ on reacting with aqua regia gives

Discussion

11.	In gold leaf elecroscope, what is the reason that only gold leaves are used?
Answer» In gold leaf elecroscope, what is the reason that only gold leaves are used?

Discussion

12.	Ether and alcohol can be distinguished by the reaction with?
Answer» Ether and alcohol can be distinguished by the reaction with?

Discussion

13.	Why the solubility of gas in liquid decreases with increase in KH value at given pressure
Answer» Why the solubility of gas in liquid decreases with increase in KH value at given pressure

Discussion

14.	calorific value of ethane in kj/g if for the reaction 2C2H6+7O2\overset{}{→4CO2+6H2O △ H =-746.5kca
Answer» calorific value of ethane in kj/g if for the reaction 2C2H6+7O2\overset{}{→4CO2+6H2O △ H =-746.5kca

Discussion

15.	Silicon crystallises in a unit cell to that of diamond. Find unit cell content for Silicon (Hint: Diamond had a face centered cubic unit cell containing a tetrahedron of atoms.)
Answer» Silicon crystallises in a unit cell to that of diamond. Find unit cell content for Silicon (Hint: Diamond had a face centered cubic unit cell containing a tetrahedron of atoms.)

Discussion

16.	A diesel engine is working with a compression ratio of 15 and expansion ratio of 10. The air standard efficiency of the cycle is (Assume γ for air=1.4)63.05
Answer» A diesel engine is working with a compression ratio of 15 and expansion ratio of 10. The air standard efficiency of the cycle is $(Assume γ for air=1.4)$ 63.05

Discussion

17.	Explain the calculation of % of free SO3 in oleum with easy numericals
Answer» Explain the calculation of % of free SO3 in oleum with easy numericals

Discussion

18.	14. the gastric juice contain 3g HCL per litre if a person produce 2.5L of gastric juice per day how many antaacid tabletsveach containing 400 mg of Al(OH)3 are needed to netrulized all the hcl produce in 1 day
Answer» 14. the gastric juice contain 3g HCL per litre if a person produce 2.5L of gastric juice per day how many antaacid tabletsveach containing 400 mg of Al(OH)3 are needed to netrulized all the hcl produce in 1 day

Discussion

19.	The maximum number of molecules are present in :-
Answer» The maximum number of molecules are present in :-

Discussion

20.	The ratio of the mass of C-12 atom to that of an atom of element X (whose atomicity is four) is 1 : 9. Themolecular mass of element X is
Answer» The ratio of the mass of C-12 atom to that of an atom of element $X$ (whose atomicity is four) is 1 : 9. Themolecular mass of element $X$ is

Discussion

21.	ntat normal temp and pressure 0.24 g volatile subs produces 43ml vapour ,. then vapour density of subs will be [demsity of hydrogen =0.000089g/mln
Answer» ntat normal temp and pressure 0.24 g volatile subs produces 43ml vapour ,. then vapour density of subs will be [demsity of hydrogen =0.000089g/mln

Discussion

22.	In which of the following crystals are the alternate tetrahedral voids occupied?
Answer» In which of the following crystals are the alternate tetrahedral voids occupied?

Discussion

23.	The number of moles of Ca(OH)2 that is dissolved to produce 250 mL of an aqueous solution of pH 10.0, assuming complete dissociation, is x×10−5. Determine the value of x.
Answer» The number of moles of $C a (O H)_{2}$ that is dissolved to produce $250 m L$ of an aqueous solution of $p H 10.0$ , assuming complete dissociation, is $x \times 10^{- 5}$ . Determine the value of $x$ .

Discussion

24.	At 27°C and 37°C the rates of a reaction are given as 1.610^-2 mol L^-1s^-1 and 3.210^-2 mol L^-1s^-1.Calculate the energy of activation for the give reaction.
Answer» At 27°C and 37°C the rates of a reaction are given as 1.610^-2 mol L^-1s^-1 and 3.210^-2 mol L^-1s^-1.Calculate the energy of activation for the give reaction.

Discussion

25.	Is percentage yeild same as Mass Percent?
Answer» Is percentage yeild same as Mass Percent?

Discussion

26.	Which of the following hydr ide have significantcovalent character) LiH 2) BeH 3) MgH,4All
Answer» Which of the following hydr ide have significantcovalent character) LiH 2) BeH 3) MgH,4All

Discussion

27.	compare the conductivity of aqueous solution of LiCl ,NaCl, KCl
Answer» compare the conductivity of aqueous solution of LiCl ,NaCl, KCl

Discussion

28.	Writechemical reactions to show the amphoteric nature of water.
Answer» Write chemical reactions to show the amphoteric nature of water.

Discussion

29.	On increasing temperature, physical adsorption:
Answer» On increasing temperature, physical adsorption:

Discussion

30.	The number of possible isomers for compound C2H3Cl2Br is
Answer» The number of possible isomers for compound $C_{2} H_{3} C l_{2} B r$ is

30.

The number of possible isomers for compound C2H3Cl2Br is

Answer»

The number of possible isomers for compound $C_{2} H_{3} C l_{2} B r$ is

Discussion

31.	50.0ml of AgNO3 solution of 0.05 M is mixed with 50.0ml of 0.01M KBrO3 solution. Will the precipitate of AgBrO3 be formed? Given : Ksp of AgBrO3 = 6.0 × 10−5
Answer» 50.0ml of $A g N O_{3}$ solution of 0.05 M is mixed with 50.0ml of 0.01M $K B r O_{3}$ solution. Will the precipitate of $A g B r O_{3}$ be formed? Given : $K_{s p}$ of $A g B r O_{3}$ = $6.0 \times 10^{- 5}$

31.

50.0ml of AgNO3 solution of 0.05 M is mixed with 50.0ml of 0.01M KBrO3 solution. Will the precipitate of AgBrO3 be formed? Given : Ksp of AgBrO3 = 6.0 × 10−5

Answer»

50.0ml of $A g N O_{3}$ solution of 0.05 M is mixed with 50.0ml of 0.01M $K B r O_{3}$ solution. Will the precipitate of $A g B r O_{3}$ be formed?

Given : $K_{s p}$ of $A g B r O_{3}$ = $6.0 \times 10^{- 5}$

Discussion

32.	Using the data (all value are in kilocalorie per mole at 25∘C ) given below, the bond energy of C−C and bond C−H bond is m kcal and n kcal, respectively. Calculate the value of m+nΔH∘combustion of ethane=−372.0ΔH∘Combustion of propane=−530.0ΔH∘forC(graphite)→C(g)=+172.0Bond energy of H - H bond=+104.0ΔH∘f of H2O(l)=−68.0ΔH∘f of CO2(g)=−94.0
Answer» Using the data (all value are in kilocalorie per mole at $25^{\circ} C$ ) given below, the bond energy of $C - C$ and bond $C - H$ bond is $m k c a l$ and $n k c a l$ , respectively. Calculate the value of $m + n$ $Δ H_{combustion of ethane}^{\circ} = - 372.0 Δ H_{Combustion of propane}^{\circ} = - 530.0 Δ H^{\circ} f o r C_{(graphite)} \to C (g) = + 172.0 Bond energy of H - H bond = + 104.0 Δ H_{f}^{\circ} o f H_{2} O (l) = - 68.0 Δ H_{f}^{\circ} o f C O_{2} (g) = - 94.0$

Discussion

33.	22. How many structural isomer possible for C7H16 ?
Answer» 22. How many structural isomer possible for C7H16 ?

Discussion

34.	If NaCl is doped with 10−3 mol % of SrCl2, the concentration of cation vacancies per mol of NaCl is
Answer» If $N a C l$ is doped with $10^{- 3}$ mol % of $S r C l_{2}$ , the concentration of cation vacancies per mol of $N a C l$ is

Discussion

35.	How could you prepare a sample of oxygen gas in the laboratory?
Answer» How could you prepare a sample of oxygen gas in the laboratory?

Discussion

36.	The smallest ratio of time periods of an electron revolving in the second orbit of a hydrogen atom to another electron revolving in the third orbit of He+ is x:y. Find the value of x+y
Answer» The smallest ratio of time periods of an electron revolving in the second orbit of a hydrogen atom to another electron revolving in the third orbit of $H e^{+}$ is $x : y$ . Find the value of $x + y$

Discussion

37.	4. Explain Sugden's concept of singlet linkage
Answer» 4. Explain Sugden's concept of singlet linkage

Discussion

38.	17. Which of the following does not give benzoic acid on hydrolysis 1) phenyl cyanide 2) benzyl chloride 3) benzoyl chloride 4) methyl benzoate
Answer» 17. Which of the following does not give benzoic acid on hydrolysis 1) phenyl cyanide 2) benzyl chloride 3) benzoyl chloride 4) methyl benzoate

Discussion

39.	Why q is not equal to zero in an isothermal process?
Answer» Why q is not equal to zero in an isothermal process?

Discussion

40.	25.when 1-butyne undergoes oxymercuration with the help of HgSO4+H2SO4, the product (s) formed are A)CH3CH2COOH+HCOOH B)CH3CH2COÇH3 C)CH3CH2CH2COOH D)CH3CH2CH2CHO
Answer» 25.when 1-butyne undergoes oxymercuration with the help of HgSO4+H2SO4, the product (s) formed are A)CH3CH2COOH+HCOOH B)CH3CH2COÇH3 C)CH3CH2CH2COOH D)CH3CH2CH2CHO

Discussion

41.	Equivalent conductance of 0.1 M HA (weakacid) solution is 10 Scm2 equivalent1 and thatat infinite dilution is 200 Scm2 equivalent-1Hence pH of HA solution is. (approx)(1) 1.3(2) 1.7c(3)23 (4) 3.6
Answer» Equivalent conductance of 0.1 M HA (weakacid) solution is 10 Scm2 equivalent1 and thatat infinite dilution is 200 Scm2 equivalent-1Hence pH of HA solution is. (approx)(1) 1.3(2) 1.7c(3)23 (4) 3.6

Discussion

42.	Computethe indicated products(i) (ii) (iii) (iv) (v) (vi)
Answer» Compute the indicated products (i) (ii) (iii) (iv) (v) (vi)

42.

Computethe indicated products(i) (ii) (iii) (iv) (v) (vi)

Answer»

Compute
the indicated products

(i)

(ii)

(iii)

(iv)

(v)

(vi)

Discussion

43.	Depict the galvaniccell in which the reaction Zn(s) + 2Ag+(aq) → Zn2+(aq)+ 2Ag(s) takes place, further show:(i) which of theelectrode is negatively charged,(ii) the carriers ofthe current in the cell, and(iii) individualreaction at each electrode.
Answer» Depict the galvanic cell in which the reaction Zn(s) + 2Ag⁺(aq) → Zn²⁺(aq) + 2Ag(s) takes place, further show: (i) which of the electrode is negatively charged, (ii) the carriers of the current in the cell, and (iii) individual reaction at each electrode.

43.

Depict the galvaniccell in which the reaction Zn(s) + 2Ag+(aq) → Zn2+(aq)+ 2Ag(s) takes place, further show:(i) which of theelectrode is negatively charged,(ii) the carriers ofthe current in the cell, and(iii) individualreaction at each electrode.

Answer»

Depict the galvanic
cell in which the reaction Zn(s) + 2Ag⁺(aq) → Zn²⁺(aq)
+ 2Ag(s) takes place, further show:

(i) which of the
electrode is negatively charged,

(ii) the carriers of
the current in the cell, and

(iii) individual
reaction at each electrode.

Discussion

44.	Zn+Cu^+2(aq)-->Zn^+2(aq)+Cu;E cell=1.1V if at constant pressure delta H for reaction is -216.7Kj/mol then standard entropy change is
Answer» Zn+Cu^+2(aq)-->Zn^+2(aq)+Cu;E cell=1.1V if at constant pressure delta H for reaction is -216.7Kj/mol then standard entropy change is

Discussion

45.	Give the general trends of ionic and covalent character.
Answer» Give the general trends of ionic and covalent character.

Discussion

46.	Silver acetate. The main product of this reaction is[Kurukshetra CET 2002]
Answer» Silver acetate. The main product of this reaction is [Kurukshetra CET 2002]

46.

Silver acetate. The main product of this reaction is[Kurukshetra CET 2002]

Answer»

Silver acetate. The main product of this reaction is

[Kurukshetra CET 2002]

Discussion

47.	Is there any equipotential surface perpendicular to the dipole at its middle?
Answer» Is there any equipotential surface perpendicular to the dipole at its middle?

Discussion

48.	Two vessels contain a mixture of two liquids A and B in the ratio 9:4 and 5:3 respectively.In which ratio must liquids ken from each vessel to give a mixture of the liquids A and B in the ratio of 2:1
Answer» Two vessels contain a mixture of two liquids A and B in the ratio 9:4 and 5:3 respectively.In which ratio must liquids ken from each vessel to give a mixture of the liquids A and B in the ratio of 2:1

Discussion

49.	Which of the following statement is incorrect about H2O2?
Answer» Which of the following statement is incorrect about $H_{2}$ $O_{2}$ ?

Discussion

50.	What are the reagents needed for conversion of benzene to phenyl acetylene?
Answer» What are the reagents needed for conversion of benzene to phenyl acetylene?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

51.Electronegavity & electron affinity of an element are X and Y respectively according to mulliken scale, hence ionisation potential of A is - 1) X+Y/2 2) 2X-Y 3) 2Y-X 4) 2X+Y

The correct structural formula of 1,2-Diethyl-1,8-dimethyl-5- propylcyclooctane is :

An unknown compound A has a molecular formula C4H6. When A is treated with an excess of Br2 a new substance B with formula C4H6Br4 is formed. A forms a white precipitate with ammoniacal silver nitrate solution. A may be

37. Of radius of first Bohr orbit is x, then de Broglie wavelength of electron in 3rd orbit is

which of the following compounds show H bonding chcl3 ch3cl hcl ch3Och3 why do other 3 do not show h bondin

How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium ?

Total number of degree of unsaturation in compound D is:

The central atom in OSF4 is

The magnitude of difference in oxidation number of ′O′ in OF2 and ​ O2F2 respectively is

NiS on reacting with aqua regia gives

In gold leaf elecroscope, what is the reason that only gold leaves are used?

Ether and alcohol can be distinguished by the reaction with?

Why the solubility of gas in liquid decreases with increase in KH value at given pressure

calorific value of ethane in kj/g if for the reaction 2C2H6+7O2\overset{}{→4CO2+6H2O △ H =-746.5kca

Silicon crystallises in a unit cell to that of diamond. Find unit cell content for Silicon (Hint: Diamond had a face centered cubic unit cell containing a tetrahedron of atoms.)

A diesel engine is working with a compression ratio of 15 and expansion ratio of 10. The air standard efficiency of the cycle is (Assume γ for air=1.4)63.05

Explain the calculation of % of free SO3 in oleum with easy numericals

14. the gastric juice contain 3g HCL per litre if a person produce 2.5L of gastric juice per day how many antaacid tabletsveach containing 400 mg of Al(OH)3 are needed to netrulized all the hcl produce in 1 day

The maximum number of molecules are present in :-

The ratio of the mass of C-12 atom to that of an atom of element X (whose atomicity is four) is 1 : 9. Themolecular mass of element X is

ntat normal temp and pressure 0.24 g volatile subs produces 43ml vapour ,. then vapour density of subs will be [demsity of hydrogen =0.000089g/mln

In which of the following crystals are the alternate tetrahedral voids occupied?

The number of moles of Ca(OH)2 that is dissolved to produce 250 mL of an aqueous solution of pH 10.0, assuming complete dissociation, is x×10−5. Determine the value of x.

At 27°C and 37°C the rates of a reaction are given as 1.6*10^-2 mol L^-1s^-1 and 3.2*10^-2 mol L^-1s^-1.Calculate the energy of activation for the give reaction.

Is percentage yeild same as Mass Percent?

Which of the following hydr ide have significantcovalent character) LiH 2) BeH 3) MgH,4All

compare the conductivity of aqueous solution of LiCl ,NaCl, KCl

Writechemical reactions to show the amphoteric nature of water.

On increasing temperature, physical adsorption:

The number of possible isomers for compound C2H3Cl2Br is

50.0ml of AgNO3 solution of 0.05 M is mixed with 50.0ml of 0.01M KBrO3 solution. Will the precipitate of AgBrO3 be formed? Given : Ksp of AgBrO3 = 6.0 × 10−5

22. How many structural isomer possible for C7H16 ?

If NaCl is doped with 10−3 mol % of SrCl2, the concentration of cation vacancies per mol of NaCl is

How could you prepare a sample of oxygen gas in the laboratory?

The smallest ratio of time periods of an electron revolving in the second orbit of a hydrogen atom to another electron revolving in the third orbit of He+ is x:y. Find the value of x+y

4. Explain Sugden's concept of singlet linkage

17. Which of the following does not give benzoic acid on hydrolysis 1) phenyl cyanide 2) benzyl chloride 3) benzoyl chloride 4) methyl benzoate

Why q is not equal to zero in an isothermal process?

25.when 1-butyne undergoes oxymercuration with the help of HgSO4+H2SO4, the product (s) formed are A)CH3CH2COOH+HCOOH B)CH3CH2COÇH3 C)CH3CH2CH2COOH D)CH3CH2CH2CHO

Equivalent conductance of 0.1 M HA (weakacid) solution is 10 Scm2 equivalent1 and thatat infinite dilution is 200 Scm2 equivalent-1Hence pH of HA solution is. (approx)(1) 1.3(2) 1.7c(3)23 (4) 3.6

Computethe indicated products(i) (ii) (iii) (iv) (v) (vi)

Depict the galvaniccell in which the reaction Zn(s) + 2Ag+(aq) → Zn2+(aq)+ 2Ag(s) takes place, further show:(i) which of theelectrode is negatively charged,(ii) the carriers ofthe current in the cell, and(iii) individualreaction at each electrode.

Zn+Cu^+2(aq)-->Zn^+2(aq)+Cu;E cell=1.1V if at constant pressure delta H for reaction is -216.7Kj/mol then standard entropy change is

Give the general trends of ionic and covalent character.

Silver acetate. The main product of this reaction is[Kurukshetra CET 2002]

Is there any equipotential surface perpendicular to the dipole at its middle?

Two vessels contain a mixture of two liquids A and B in the ratio 9:4 and 5:3 respectively.In which ratio must liquids ken from each vessel to give a mixture of the liquids A and B in the ratio of 2:1

Which of the following statement is incorrect about H2O2?

What are the reagents needed for conversion of benzene to phenyl acetylene?

The magnitude of difference in oxidation number of ′O′ in OF2 and O2F2 respectively is

At 27°C and 37°C the rates of a reaction are given as 1.610^-2 mol L^-1s^-1 and 3.210^-2 mol L^-1s^-1.Calculate the energy of activation for the give reaction.