46295 + Interview Questions in Chemistry

1.	29 Either hydrogen have accurate place in periodic table?
Answer» 29 Either hydrogen have accurate place in periodic table?

Discussion

2.	Identify the correct formula of oleum from the following :
Answer» Identify the correct formula of oleum from the following :

Discussion

3.	Q. Calculate the radius of first orbit of He+ ion.
Answer» Q. Calculate the radius of first orbit of He+ ion.

Discussion

4.	Number of optical isomers of alpha d glucose and beta d glucose?
Answer» Number of optical isomers of alpha d glucose and beta d glucose?

Discussion

5.	Two heavy spheres of masses 104 kg and 106 kg and each of radius 40 cm are separated by a dis†an ce of 100 m. What will be the potential at the mid-point of the line joining t heir centres approximately?
Answer» Two heavy spheres of masses 104 kg and 106 kg and each of radius 40 cm are separated by a dis†an ce of 100 m. What will be the potential at the mid-point of the line joining t heir centres approximately?

Discussion

6.	In order to decrease the density of a gas which of the following changes must be done
Answer» In order to decrease the density of a gas which of the following changes must be done

Discussion

7.	When sodium is exposed to air the products formed will be: 1.Na_{2_{}}O 2.NaOH 3.Na_2CO_3 4.All of these
Answer» When sodium is exposed to air the products formed will be: 1.Na_{2_{}}O 2.NaOH 3.Na_2CO_3 4.All of these

Discussion

8.	Ice and water are placed in a closed container at a pressure of 1 atm and 273.15 K temperature. If pressureof the system is increased by 2 atm keeping temperature constant the correct observation would be(1) The liquid phase disappears completely(2) The amount of ice increases(3) The solid phase (ice) disappears completely(4) Volume of the system increases
Answer» Ice and water are placed in a closed container at a pressure of 1 atm and 273.15 K temperature. If pressure of the system is increased by 2 atm keeping temperature constant the correct observation would be (1) The liquid phase disappears completely (2) The amount of ice increases (3) The solid phase (ice) disappears completely (4) Volume of the system increases

Discussion

9.	geometrical isomer
Answer» geometrical isomer

Discussion

10.	Choral i.e. ccl3cho gives aldol condensation or cannizaro reaction ? And tell the reason.
Answer» Choral i.e. ccl3cho gives aldol condensation or cannizaro reaction ? And tell the reason.

Discussion

11.	47.What is the number of second nearest neighbour in simple cubic unit cell, body center cubic unit cell, face centered cubic unit cell.
Answer» 47.What is the number of second nearest neighbour in simple cubic unit cell, body center cubic unit cell, face centered cubic unit cell.

Discussion

12.	Rahul added some salt crystals to purify the drinking water. Identify the chemical formula of this salt.
Answer» Rahul added some salt crystals to purify the drinking water. Identify the chemical formula of this salt.

Discussion

13.	How to calculate the n-factor of 1)covalent compound 2) ionic compound 3) ion
Answer» How to calculate the n-factor of 1)covalent compound 2) ionic compound 3) ion

Discussion

14.	30. 40% N2O4 molecules are dissociated in a sample ofgas at 27C and 760mmHg Calculate the density of the equilibrium mixture?
Answer» 30. 40% N2O4 molecules are dissociated in a sample ofgas at 27C and 760mmHg Calculate the density of the equilibrium mixture?

Discussion

15.	What is the relation between the interaction energy of ion induced dipole force to the r value( r is the internuclear distance between ion and molecule) like for ion dipole force it is inversely proportional to cube of r value
Answer» What is the relation between the interaction energy of ion induced dipole force to the r value( r is the internuclear distance between ion and molecule) like for ion dipole force it is inversely proportional to cube of r value

Discussion

16.	Arrange the following compounds in the increasing order of their densities. (a) (i) < (ii) < (iii) <(iv) (b) (i) < (iii) < (iv) < (ii) (c) (iv) <(iii) <(ii) < (i) (d) (ii) < (iv) < (iii) < (i)
Answer» Arrange the following compounds in the increasing order of their densities. (a) (i) < (ii) < (iii) <(iv) (b) (i) < (iii) < (iv) < (ii) (c) (iv) <(iii) <(ii) < (i) (d) (ii) < (iv) < (iii) < (i)

16.

Arrange the following compounds in the increasing order of their densities. (a) (i) < (ii) < (iii) <(iv) (b) (i) < (iii) < (iv) < (ii) (c) (iv) <(iii) <(ii) < (i) (d) (ii) < (iv) < (iii) < (i)

Answer»

Arrange the following compounds in the increasing order of their densities.

(a) (i) < (ii) < (iii) <(iv) (b) (i) < (iii) < (iv) < (ii)

(c) (iv) <(iii) <(ii) < (i) (d) (ii) < (iv) < (iii) < (i)

Discussion

17.	Whichis the last element in the series of the actinoids? Write theelectronic configuration of this element. Comment on the possibleoxidation state of this element.
Answer» Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.

Discussion

18.	resonance structure of 1,1,2-trimethyl-4-oxo cyclohex-2,5-diene
Answer» resonance structure of 1,1,2-trimethyl-4-oxo cyclohex-2,5-diene

Discussion

19.	What is the meaning of virtual object?
Answer» What is the meaning of virtual object?

Discussion

20.	Number of sulphur atoms in 0.206 g molecule Na2S2O8 is
Answer» Number of sulphur atoms in 0.206 g molecule Na2S2O8 is

Discussion

21.	What is a COORDINATE bond? It is considered a sigma bond or pi bond? If it is sigma then do we consider it for calculation of geometry,shape and hybridisation ?? Also while finding no. of bond pairs of a compound, do we add the no. of coordinate bonds as well?
Answer» What is a COORDINATE bond? It is considered a sigma bond or pi bond? If it is sigma then do we consider it for calculation of geometry,shape and hybridisation ?? Also while finding no. of bond pairs of a compound, do we add the no. of coordinate bonds as well?

Discussion

22.	Solid AB has CsCl type structure. If the radius of A+ ion is 73.2 pm then the minimum radius of B− (in pm) ion will be:
Answer» Solid $A B$ has $C s C l$ type structure. If the radius of $A^{+}$ ion is $73.2 pm$ then the minimum radius of $B^{-}$ $(in pm)$ ion will be:

Discussion

23.	Mettez ces phrases à la forme négative.p { margin-bottom: 0.25cm; line-height: 120%; }a:link { }(1) Le pharmacien a une secrétaire.(2) Marie a des devoirs de maths.(3) Elles lisent des romans de Victor Hugo.(4) Sophie a un cours de français le mardi matin.(5) Notre école a une bibliothèque.
Answer» Mettez ces phrases à la forme négative. (1) Le pharmacien a une secrétaire. (2) Marie a des devoirs de maths. (3) Elles lisent des romans de Victor Hugo. (4) Sophie a un cours de français le mardi matin. (5) Notre école a une bibliothèque.

23.

Mettez ces phrases à la forme négative.p { margin-bottom: 0.25cm; line-height: 120%; }a:link { }(1) Le pharmacien a une secrétaire.(2) Marie a des devoirs de maths.(3) Elles lisent des romans de Victor Hugo.(4) Sophie a un cours de français le mardi matin.(5) Notre école a une bibliothèque.

Answer» Mettez ces phrases à la forme négative.

(1) Le pharmacien a une secrétaire.

(2) Marie a des devoirs de maths.

(3) Elles lisent des romans de Victor Hugo.

(4) Sophie a un cours de français le mardi matin.

(5) Notre école a une bibliothèque.

Discussion

24.	In a photoelectric emission, electrons are ejected from metals P and Q by light of frequency f. The potential difference V required to stop the electrons is measured for various frequencies. If Q has a greater work function, then P which graph illustrates the expected results?
Answer» In a photoelectric emission, electrons are ejected from metals $P$ and $Q$ by light of frequency $f$ . The potential difference $V$ required to stop the electrons is measured for various frequencies. If $Q$ has a greater work function, then $P$ which graph illustrates the expected results?

Discussion

25.	Why acetic acid dissociate in water and associate in benzene
Answer» Why acetic acid dissociate in water and associate in benzene

Discussion

26.	Reaction with hydrogen peroxide
Answer» Reaction with hydrogen peroxide

Discussion

27.	In the hexagonal close packing ,why the contribution of each corner atom is 1/6?
Answer» In the hexagonal close packing ,why the contribution of each corner atom is 1/6?

Discussion

28.	describe the method for the identification of primary, secondary and tertiary amines. Also write chemical equations of the reactions involved.
Answer» describe the method for the identification of primary, secondary and tertiary amines. Also write chemical equations of the reactions involved.

Discussion

29.	The nature of electolytes used in a salt bridge are:
Answer» The nature of electolytes used in a salt bridge are:

Discussion

30.	no. of Na atoms present in 2 moles of Na?
Answer» no. of Na atoms present in 2 moles of Na?

Discussion

31.	Which is more reactive chlorobenzene and chloroethane in the nucleophilic substitution and why?
Answer» Which is more reactive chlorobenzene and chloroethane in the nucleophilic substitution and why?

Discussion

32.	1) if the density of methankm is 0.793kg l^-1, what is it's volume needed for Making 2.5 l of it's 0.25 m solution?
Answer» 1) if the density of methankm is 0.793kg l^-1, what is it's volume needed for Making 2.5 l of it's 0.25 m solution?

Discussion

33.	Finkelstein reaction for the preparation of alkyl iodide is based upon the fact that
Answer» Finkelstein reaction for the preparation of alkyl iodide is based upon the fact that

Discussion

34.	The reaction of RCONH2 with a mixture of Br2 and KOH gives R−NH2 as the main product. The intermediates involved in this reaction are
Answer» The reaction of $R C O N H_{2}$ with a mixture of $B r_{2}$ and $K O H$ gives $R - N H_{2}$ as the main product. The intermediates involved in this reaction are

Discussion

35.	an hexagonal close packaging crystal lattice has 1)same coordination number as of simple primitive 2)same type of voids as of body centerrd cubic lattice 3)same ratio of atoms and voids as of face centered cubic lattice 4)all of the
Answer» an hexagonal close packaging crystal lattice has 1)same coordination number as of simple primitive 2)same type of voids as of body centerrd cubic lattice 3)same ratio of atoms and voids as of face centered cubic lattice 4)all of the

Discussion

36.	Slove root of 1-cos2x only use ingration as inverse of differentiation
Answer» Slove root of 1-cos2x only use ingration as inverse of differentiation

Discussion

37.	Bicyclohexane was found to undergo parallel first order reactions at 730K to form cyclohexane and methyl cyclopentene. Rate constant for the formation of cyclohexane was 1.26×10^-4 /s andfor the formation of methyl cyclopentene was 3.8×10^-5/sec . Fraction of cyclohexane in the product is ?
Answer» Bicyclohexane was found to undergo parallel first order reactions at 730K to form cyclohexane and methyl cyclopentene. Rate constant for the formation of cyclohexane was 1.26×10^-4 /s andfor the formation of methyl cyclopentene was 3.8×10^-5/sec . Fraction of cyclohexane in the product is ?

Discussion

38.	When D – Glucose is treated with a base it is converted into:
Answer» When D – Glucose is treated with a base it is converted into:

Discussion

39.	A compound is formed by the elements X, Y . It has a cubic structure with atoms of element X occupying corners and half the face centres of the cube. Atoms of element Y are present at the remaining face centres and body centre. What will be the simplest formula of the compound if all the atoms are removed from one body diagonal of the cube?
Answer» A compound is formed by the elements X, Y . It has a cubic structure with atoms of element X occupying corners and half the face centres of the cube. Atoms of element Y are present at the remaining face centres and body centre. What will be the simplest formula of the compound if all the atoms are removed from one body diagonal of the cube?

Discussion

40.	Among the following gases which one has the lowest root mean square velocity at 25∘ C
Answer» Among the following gases which one has the lowest root mean square velocity at 25 $^{\circ}$ C

40.

Among the following gases which one has the lowest root mean square velocity at 25∘ C

Answer»

Among the following gases which one has the lowest root mean square velocity at 25 $^{\circ}$ C

Discussion

41.	What is the ratio of time periods (T1/T2) in second orbit of hydrogen atom to third orbit of He+ ion?
Answer» What is the ratio of time periods $(T_{1} / T_{2})$ in second orbit of hydrogen atom to third orbit of $H e^{+}$ ion?

Discussion

42.	A hydrogen electrode placed in a buffer solution of CH3COOH and acetic acid in the ratio's x:y and y:x has electrode potential values E1 and E2 volts respectively at 25. the pKa value of acetic acid is ?(E1 and E2. Are oxidation patential)
Answer» A hydrogen electrode placed in a buffer solution of CH3COOH and acetic acid in the ratio's x:y and y:x has electrode potential values E1 and E2 volts respectively at 25. the pKa value of acetic acid is ?(E1 and E2. Are oxidation patential)

Discussion

43.	The de-broglie wavelength of an electron is same as that of a photon. If velocity of electron is 50% of the speed of light, then KE of photon/ KE of electron?
Answer» The de-broglie wavelength of an electron is same as that of a photon. If velocity of electron is 50% of the speed of light, then KE of photon/ KE of electron?

Discussion

44.	Dry air was passed through a solution containing 20 g of a substance in 100.0 g of water and then through pure water. The loss in mass of the solution was 3 g and that of pure water was 0.06 g. Calculate the molar mass of the substance.
Answer» Dry air was passed through a solution containing $20 g$ of a substance in $100.0 g$ of water and then through pure water. The loss in mass of the solution was $3 g$ and that of pure water was $0.06 g$ . Calculate the molar mass of the substance.

Discussion

45.	A sample od dolomite contained 45% of CaCO_{}, 40% of MgCO_3 and 15% of clay. Calculate the mass of sulphuric acid of 30% strength requires to react completely with 10g of the sample.
Answer» A sample od dolomite contained 45% of CaCO_{}, 40% of MgCO_3 and 15% of clay. Calculate the mass of sulphuric acid of 30% strength requires to react completely with 10g of the sample.

Discussion

46.	CH_3-CO-CH_2-CH_2-COO-CH_2-CH_3+CH_3MgBr(1eq.) find the product formed and reaction mechanism
Answer» CH_3-CO-CH_2-CH_2-COO-CH_2-CH_3+CH_3MgBr(1eq.) find the product formed and reaction mechanism

Discussion

47.	2 molal urea solution is diluted from 2 kg to 5 kg by addition of water calculate molality of the diluted solution.
Answer» 2 molal urea solution is diluted from 2 kg to 5 kg by addition of water calculate molality of the diluted solution.

Discussion

48.	The decreasing order of relative nucleophilicity of the following nucleophiles in a protic solvent is SH−,AcO−,PhO−,OH−,H2O
Answer» The decreasing order of relative nucleophilicity of the following nucleophiles in a protic solvent is $S H^{-}, A c O^{-}, P h O^{-}, O H^{-}, H_{2} O$

Discussion

49.	what is the IUPAC name of Benzyl ethyl ether ?
Answer» what is the IUPAC name of Benzyl ethyl ether ?

Discussion

50.	For the reaction N2O4(g) Image not present 2NO2(g) the degree of dissociation is 0.2 at equilibrium and 1 atm pressure then equilibrium cons†an t Kp will be :-
Answer» For the reaction N2O4(g) Image not present 2NO2(g) the degree of dissociation is 0.2 at equilibrium and 1 atm pressure then equilibrium cons†an t Kp will be :-

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

29 Either hydrogen have accurate place in periodic table?

Identify the correct formula of oleum from the following :

Q. Calculate the radius of first orbit of He+ ion.

Number of optical isomers of alpha d glucose and beta d glucose?

Two heavy spheres of masses 104 kg and 106 kg and each of radius 40 cm are separated by a dis†an ce of 100 m. What will be the potential at the mid-point of the line joining t heir centres approximately?

In order to decrease the density of a gas which of the following changes must be done

When sodium is exposed to air the products formed will be: 1.Na_{2_{}}O 2.NaOH 3.Na_2CO_3 4.All of these

geometrical isomer

Choral i.e. ccl3cho gives aldol condensation or cannizaro reaction ? And tell the reason.

47.What is the number of second nearest neighbour in simple cubic unit cell, body center cubic unit cell, face centered cubic unit cell.

Rahul added some salt crystals to purify the drinking water. Identify the chemical formula of this salt.

How to calculate the n-factor of 1)covalent compound 2) ionic compound 3) ion

30. 40% N2O4 molecules are dissociated in a sample ofgas at 27C and 760mmHg Calculate the density of the equilibrium mixture?

What is the relation between the interaction energy of ion induced dipole force to the r value( r is the internuclear distance between ion and molecule) like for ion dipole force it is inversely proportional to cube of r value

Arrange the following compounds in the increasing order of their densities. (a) (i) &lt; (ii) &lt; (iii) &lt;(iv) (b) (i) &lt; (iii) &lt; (iv) &lt; (ii) (c) (iv) &lt;(iii) &lt;(ii) &lt; (i) (d) (ii) &lt; (iv) &lt; (iii) &lt; (i)

Whichis the last element in the series of the actinoids? Write theelectronic configuration of this element. Comment on the possibleoxidation state of this element.

resonance structure of 1,1,2-trimethyl-4-oxo cyclohex-2,5-diene

What is the meaning of virtual object?

Number of sulphur atoms in 0.206 g molecule Na2S2O8 is

What is a COORDINATE bond? It is considered a sigma bond or pi bond? If it is sigma then do we consider it for calculation of geometry,shape and hybridisation ?? Also while finding no. of bond pairs of a compound, do we add the no. of coordinate bonds as well?

Solid AB has CsCl type structure. If the radius of A+ ion is 73.2 pm then the minimum radius of B− (in pm) ion will be:

Mettez ces phrases à la forme négative.p { margin-bottom: 0.25cm; line-height: 120%; }a:link { }(1) Le pharmacien a une secrétaire.(2) Marie a des devoirs de maths.(3) Elles lisent des romans de Victor Hugo.(4) Sophie a un cours de français le mardi matin.(5) Notre école a une bibliothèque.

In a photoelectric emission, electrons are ejected from metals P and Q by light of frequency f. The potential difference V required to stop the electrons is measured for various frequencies. If Q has a greater work function, then P which graph illustrates the expected results?

Why acetic acid dissociate in water and associate in benzene

Reaction with hydrogen peroxide

In the hexagonal close packing ,why the contribution of each corner atom is 1/6?

describe the method for the identification of primary, secondary and tertiary amines. Also write chemical equations of the reactions involved.

The nature of electolytes used in a salt bridge are:

no. of Na atoms present in 2 moles of Na?

Which is more reactive chlorobenzene and chloroethane in the nucleophilic substitution and why?

1) if the density of methankm is 0.793kg l^-1, what is it's volume needed for Making 2.5 l of it's 0.25 m solution?

Finkelstein reaction for the preparation of alkyl iodide is based upon the fact that

The reaction of RCONH2 with a mixture of Br2 and KOH gives R−NH2 as the main product. The intermediates involved in this reaction are

an hexagonal close packaging crystal lattice has 1)same coordination number as of simple primitive 2)same type of voids as of body centerrd cubic lattice 3)same ratio of atoms and voids as of face centered cubic lattice 4)all of the

Slove root of 1-cos2x only use ingration as inverse of differentiation

Bicyclohexane was found to undergo parallel first order reactions at 730K to form cyclohexane and methyl cyclopentene. Rate constant for the formation of cyclohexane was 1.26×10^-4 /s andfor the formation of methyl cyclopentene was 3.8×10^-5/sec . Fraction of cyclohexane in the product is ?

When D – Glucose is treated with a base it is converted into:

Among the following gases which one has the lowest root mean square velocity at 25∘ C

What is the ratio of time periods (T1/T2) in second orbit of hydrogen atom to third orbit of He+ ion?

A hydrogen electrode placed in a buffer solution of CH3COOH and acetic acid in the ratio's x:y and y:x has electrode potential values E1 and E2 volts respectively at 25. the pKa value of acetic acid is ?(E1 and E2. Are oxidation patential)

The de-broglie wavelength of an electron is same as that of a photon. If velocity of electron is 50% of the speed of light, then KE of photon/ KE of electron?

Dry air was passed through a solution containing 20 g of a substance in 100.0 g of water and then through pure water. The loss in mass of the solution was 3 g and that of pure water was 0.06 g. Calculate the molar mass of the substance.

A sample od dolomite contained 45% of CaCO_{}, 40% of MgCO_3 and 15% of clay. Calculate the mass of sulphuric acid of 30% strength requires to react completely with 10g of the sample.

CH_3-CO-CH_2-CH_2-COO-CH_2-CH_3+CH_3MgBr(1eq.) find the product formed and reaction mechanism

2 molal urea solution is diluted from 2 kg to 5 kg by addition of water calculate molality of the diluted solution.

The decreasing order of relative nucleophilicity of the following nucleophiles in a protic solvent is SH−,AcO−,PhO−,OH−,H2O

what is the IUPAC name of Benzyl ethyl ether ?

For the reaction N2O4(g) Image not present 2NO2(g) the degree of dissociation is 0.2 at equilibrium and 1 atm pressure then equilibrium cons†an t Kp will be :-

Arrange the following compounds in the increasing order of their densities. (a) (i) < (ii) < (iii) <(iv) (b) (i) < (iii) < (iv) < (ii) (c) (iv) <(iii) <(ii) < (i) (d) (ii) < (iv) < (iii) < (i)