46295 + Interview Questions in Chemistry

1.	The hydrides which are polymeric
Answer» The hydrides which are polymeric

Discussion

2.	Unsymmetrical alkane can be prepared in good yield by -
Answer» Unsymmetrical alkane can be prepared in good yield by -

Discussion

3.	Phenol is less soluble in water.It is due to
Answer» Phenol is less soluble in water.It is due to

Discussion

4.	A solution prepared by mixing 200 ml of 0.025 M CaCl2 and 400 ml of 0.15 M Na2SO4? Given Ksp of CaSO4 = 2.4 × 10−5 Then
Answer» A solution prepared by mixing $200 m l$ of $0.025 M$ $C a C l_{2}$ and $400 m l$ of $0.15 M$ $N a_{2} S O_{4}$ ? Given $K_{s p}$ of $C a S O_{4}$ = $2.4 \times 10^{- 5}$ Then

Discussion

5.	Which of the following will undergo a faster SN1?
Answer» Which of the following will undergo a faster $S_{N} 1$ ?

Discussion

6.	Pls tell me sir, E=hv is for particle or wave ?
Answer» Pls tell me sir, E=hv is for particle or wave ?

Discussion

7.	Explain me the concept of vernier callipers with diagrams
Answer» Explain me the concept of vernier callipers with diagrams

Discussion

8.	Explain the following, giving reasons : (i) When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequency as the incident frequency. (ii) When light travels from a rarer to a denser medium, the speed decreases. Does this decrease in speed imply a reduction in the energy carried by the wave ? iii) In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave. What determines the intensity in the photon picture of light ?
Answer» Explain the following, giving reasons : (i) When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequency as the incident frequency. (ii) When light travels from a rarer to a denser medium, the speed decreases. Does this decrease in speed imply a reduction in the energy carried by the wave ? iii) In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave. What determines the intensity in the photon picture of light ?

Discussion

9.	The d and l isomer of [Co(en)3]3+ are type of:
Answer» The d and l isomer of [Co(en)₃]³⁺are type of:

Discussion

10.	Thermally most stable compound is:-
Answer» Thermally most stable compound is:-

Discussion

11.	What is the formula of a compound in which the element Y forms HCP lattice and atoms of X occupy 23rd of tetrahedral voids?
Answer» What is the formula of a compound in which the element Y forms HCP lattice and atoms of X occupy ${\frac{2}{3}}^{r d}$ of tetrahedral voids?

Discussion

12.	Choose the sugars arranged in the ascending order of the number of carbon atoms they possess.
Answer» Choose the sugars arranged in the ascending order of the number of carbon atoms they possess.

Discussion

13.	Which of the following does not have a coordinate bond
Answer» Which of the following does not have a coordinate bond

Discussion

14.	X––Mn7+2+Y––O2−7→Z––Mn4++A––O2 X,Y,Z and A are stoichiometric coefficients. Here, X,Y,Z and A are respectively
Answer» $X - - M n_{2}^{7 +} + Y - - O_{7}^{2 -} \to Z - - M n^{4 +} + A - - O_{2}$ X,Y,Z and A are stoichiometric coefficients. Here, X,Y,Z and A are respectively

Discussion

15.	What is the difference between contact process and lead chamber process?
Answer» What is the difference between contact process and lead chamber process?

Discussion

16.	Which of the following carbocation is least stable
Answer» Which of the following carbocation is least stable

Discussion

17.	Value of i1947+i(−1947) is
Answer» Value of $i^{1947} + i^{(- 1947)}$ is

Discussion

18.	Which of the following 0.10 M aqueous solution will have the lowest freezing point.
Answer» Which of the following 0.10 M aqueous solution will have the lowest freezing point.

Discussion

19.	Which is the following changes does not require a reducing agent:
Answer» Which is the following changes does not require a reducing agent:

Discussion

20.	Column Matching:Column (I)Column (II)(A) In R2, if the magnitude of the projectionvector of the vector α^i+β^j on √3^i+^jis √3 and if α=2+√3β, then possiblevalue(s) of \|α\| is (are)(P) 1(B) Let a and b be real numbers such thatthe functionf(x)={−3ax2−2, x<1bx+a2, x≥1 is differentiable for all x∈R. Thenpossible value(s) of a is (are) (Q) 2(C) Let ω≠1 be a complex cube root ofunity. If (3−3ω+2ω2)4n+3+(2+3ω−3ω2)4n+3+(−3+2ω+3ω2)4n+3=0,then possible value(s) of n is (are)(R) 3(D) Let the harmonic mean of two positive realnumbers a and b be 4. If q is a positive realnumber such that a,5,q,b is an arithmeticprogression, then the value(s) of \|q−a\| is (are)(S) 4(T) 5Option (D) matches with which of the elements of right hand column?
Answer» Column Matching: $Column (I)Column (II)(A) In R2, if the magnitude of the projectionvector of the vector α^i+β^j on √3^i+^jis √3 and if α=2+√3β, then possiblevalue(s) of \|α\| is (are)(P) 1(B) Let a and b be real numbers such thatthe functionf(x)={−3ax2−2, x<1bx+a2, x≥1 is differentiable for all x∈R. Thenpossible value(s) of a is (are) (Q) 2(C) Let ω≠1 be a complex cube root ofunity. If (3−3ω+2ω2)4n+3+(2+3ω−3ω2)4n+3+(−3+2ω+3ω2)4n+3=0,then possible value(s) of n is (are)(R) 3(D) Let the harmonic mean of two positive realnumbers a and b be 4. If q is a positive realnumber such that a,5,q,b is an arithmeticprogression, then the value(s) of \|q−a\| is (are)(S) 4(T) 5$ Option $(D)$ matches with which of the elements of right hand column?

Discussion

21.	The freezing point of one molal NaCl solution assuming NaCl to be 100% dissociated in water is (molal depression constant = 1.86)
Answer» The freezing point of one molal NaCl solution assuming NaCl to be 100% dissociated in water is (molal depression constant = 1.86)

Discussion

22.	The radioactive decay Bi21183→Tl20781, takes place in a 100 L closed vessel at 27∘C. Starting with 2 moles of Bi21183 (t1/2 = 130 seconds), the pressure developed in the vessel after 520 seconds will be:
Answer» The radioactive decay $B i_{83}^{211} \to T l_{81}^{207}$ , takes place in a $100 L$ closed vessel at $27^{\circ} C$ . Starting with 2 moles of $B i_{83}^{211}$ ( $t_{1 / 2}$ = 130 seconds), the pressure developed in the vessel after 520 seconds will be:

Discussion

23.	White phosphorus burns in a limited supply of air to form Phosphorus trioxide. When this soft white solid is burnt in plentiful supply of air, we get phosphorus __.
Answer» White phosphorus burns in a limited supply of air to form Phosphorus trioxide. When this soft white solid is burnt in plentiful supply of air, we get phosphorus __.

Discussion

24.	Although both CO2 and H2O are triatomic molecules, the shape of H2O molecule is bent while that of CO2 is linear. Explain this on the basis of dipole moment.
Answer» Although both $C O_{2}$ and $H_{2} O$ are triatomic molecules, the shape of $H_{2} O$ molecule is bent while that of $C O_{2}$ is linear. Explain this on the basis of dipole moment.

Discussion

25.	Mond process is used for refining:
Answer» Mond process is used for refining:

Discussion

26.	Energy levels, A, B, C, of a certain atom correspond to increasing values of energy i.e., EA<EB<EC If λ1,λ2,λ3 are the wave lengths of radiations corresponding to the transition from C to B, B to A and C to A respectively, which of the following statements is correct ?
Answer» Energy levels, A, B, C, of a certain atom correspond to increasing values of energy i.e., $E_{A} < E_{B} < E_{C}$ If $λ_{1}, λ_{2}, λ_{3}$ are the wave lengths of radiations corresponding to the transition from C to B, B to A and C to A respectively, which of the following statements is correct ?

Discussion

27.	Molality (in mol/kg) of a solution in which 0.13 mole of solute is dissolved in 500 gm of water is:
Answer» Molality (in mol/kg) of a solution in which 0.13 mole of solute is dissolved in 500 gm of water is:

Discussion

28.	The magnetic nature of [Cr(NH3)6]3+and[Co(NH3)6]3+ are
Answer» The magnetic nature of $[C r (N H_{3})_{6}]^{3 +} a n d [C o (N H_{3})_{6}]^{3 +}$ are

Discussion

29.	Which of the following behaves as an ambiphilic reagent?
Answer» Which of the following behaves as an ambiphilic reagent?

Discussion

30.	Thermodynamic feasibility of the reaction alone cannot decide the rate of the reaction. Explain with the help of one example.
Answer» Thermodynamic feasibility of the reaction alone cannot decide the rate of the reaction. Explain with the help of one example.

Discussion

31.	On heating in air, sodium burns violently with golden yellow flame forming
Answer» On heating in air, sodium burns violently with golden yellow flame forming

Discussion

32.	As compared to potassium, sodium has
Answer» As compared to potassium, sodium has

Discussion

33.	If 2 moles of H2 and O2 are available for the reaction, identify the limiting reagent for the reaction, 2H2 + O2 → 2H2O
Answer» If 2 moles of H₂ and O₂ are available for the reaction, identify the limiting reagent for the reaction, 2H₂ + O₂ → 2H₂O

33.

If 2 moles of H2 and O2 are available for the reaction, identify the limiting reagent for the reaction, 2H2 + O2 → 2H2O

Answer»

If 2 moles of H₂ and O₂ are available for the reaction, identify the limiting reagent for the reaction,

2H₂ + O₂ → 2H₂O

Discussion

34.	The most unlikely representation of resonance structures of p-nitrophenoxide ion is :
Answer» The most unlikely representation of resonance structures of p-nitrophenoxide ion is :

Discussion

35.	If the value of an equilibrium constant for a particular reaction is 1.6 × 1012, then at equilibrium the system will contain :
Answer» If the value of an equilibrium constant for a particular reaction is 1.6 $\times$ $10^{12}$ , then at equilibrium the system will contain :

Discussion

36.	In the following reactions, the major product W is:
Answer» In the following reactions, the major product W is:

Discussion

37.	Present a comparative account of the alkali and alkaline earth metals with respect to the following charactieristics. (i) Tendency to form ionic / covalent compounds (ii) Nature fo oxides and their solubility in water (iii) Formation of oxosalts (iv) Solubility of oxosalts. (v) Thermal stability of oxosalts.
Answer» Present a comparative account of the alkali and alkaline earth metals with respect to the following charactieristics. (i) Tendency to form ionic / covalent compounds (ii) Nature fo oxides and their solubility in water (iii) Formation of oxosalts (iv) Solubility of oxosalts. (v) Thermal stability of oxosalts.

37.

Present a comparative account of the alkali and alkaline earth metals with respect to the following charactieristics. (i) Tendency to form ionic / covalent compounds (ii) Nature fo oxides and their solubility in water (iii) Formation of oxosalts (iv) Solubility of oxosalts. (v) Thermal stability of oxosalts.

Answer»

Present a comparative account of the alkali and alkaline earth metals with respect to the following charactieristics.

(i) Tendency to form ionic / covalent compounds

(ii) Nature fo oxides and their solubility in water

(iii) Formation of oxosalts

(iv) Solubility of oxosalts.

(v) Thermal stability of oxosalts.

Discussion

38.	Enthalpy of sublimation of iodine is 8.3 kcalmol−1 at 350 K. If molar heat capacity of I2(s) and I2(vap) are 14 and 8 calmol−1 K−1 respectively, then what is entropy of sublimation of I2(s) at 400 K in calmol−1K−1? (pressure = 1 atm)
Answer» Enthalpy of sublimation of iodine is 8.3 $k c a l m o l^{- 1}$ at 350 K. If molar heat capacity of $I_{2 (s)}$ and $I_{2 (v a p)}$ are 14 and 8 $c a l m o l^{- 1} K^{- 1}$ respectively, then what is entropy of sublimation of $I_{2 (s)}$ at 400 K in $c a l m o l^{- 1} K^{- 1}$ ? (pressure = 1 atm)

Discussion

39.	If a mixture of CO2 and N2 in equal amount exert a total pressure of 1 atm, the partial pressure of N2 in the mixture is –
Answer» If a mixture of $C O_{2} a n d N_{2}$ in equal amount exert a total pressure of 1 atm, the partial pressure of $N_{2}$ in the mixture is –

Discussion

40.	Incorrect matching amongst the following is (i) Linear →H2O, SO2 (ii) V - shaped →CH2Cl2, SnCl2 (iii) See-saw shaped →SF4, TeCl4 (iv) T - shaped →ICl3, ClF3
Answer» Incorrect matching amongst the following is (i) Linear $\to H_{2} O, S O_{2}$ (ii) V - shaped $\to C H_{2} C l_{2}, S n C l_{2}$ (iii) See-saw shaped $\to S F_{4}, T e C l_{4}$ (iv) T - shaped $\to I C l_{3}, C l F_{3}$

Discussion

41.	\(N_2 ~+ ~O_2 ~\rightleftharpoons~ 2NO ~+~ (-Q cals)\) In the above reaction which is the essential condition for the higher production of NO
Answer» \(N_2 ~+ ~O_2 ~\rightleftharpoons~ 2NO ~+~ (-Q cals)\) In the above reaction which is the essential condition for the higher production of $N O$

41.

$N_2 ~+ ~O_2 ~\rightleftharpoons~ 2NO ~+~ (-Q cals)$ In the above reaction which is the essential condition for the higher production of NO

Answer»

$N_2 ~+ ~O_2 ~\rightleftharpoons~ 2NO ~+~ (-Q cals)$

In the above reaction which is the essential condition for the higher production of $N O$

Discussion

42.	The ratio of Earth's orbital angular momentum (about sun) to its mass is 4.4×1015 m2s−1. The area enclosed by the earth's orbit is approximately
Answer» The ratio of Earth's orbital angular momentum (about sun) to its mass is $4.4 \times 10^{15} m^{2} s^{- 1}$ . The area enclosed by the earth's orbit is approximately

Discussion

43.	The wavelength of the third line of the Balmer series for a hydrogen atom is :
Answer» The wavelength of the third line of the Balmer series for a hydrogen atom is :

Discussion

44.	22.7 mL of a N10Na2CO3 solution neutralizes 10.2 mL of dilute H2SO4. Find the volume of water to be added to 400 mL of the same H2SO4 solution to make its concentration exactly N10.
Answer» $22.7 mL$ of a $\frac{N}{10} N a_{2} C O_{3}$ solution neutralizes $10.2 mL$ of dilute $H_{2} S O_{4}$ . Find the volume of water to be added to $400 mL$ of the same $H_{2} S O_{4}$ solution to make its concentration exactly $\frac{N}{10}$ .

Discussion

45.	Let’s try another question. Which of the following are possible wedge – dash representations for Glyceraldehyde. Assume the H and OH on the second carbon are coming out of the plane.
Answer» Let’s try another question. Which of the following are possible wedge – dash representations for Glyceraldehyde. Assume the H and OH on the second carbon are coming out of the plane.

Discussion

46.	In physical adsorption, the gas molecules are held on solid surface by:
Answer» In physical adsorption, the gas molecules are held on solid surface by:

Discussion

47.	Consider the following species: CN+, CN–, NO and CN Which one of these will have the highest bond order?
Answer» Consider the following species: $C N^{+}$ , $C N^{-}$ , $N O$ and $C N$ Which one of these will have the highest bond order?

Discussion

48.	How many names can be assigned to a hydroxyl substituted benzene dicarbonitrile?
Answer» How many names can be assigned to a hydroxyl substituted benzene dicarbonitrile?

Discussion

49.	In a crystal cations and anions are held together by
Answer» In a crystal cations and anions are held together by

49.

In a crystal cations and anions are held together by

Answer»

In a crystal cations and anions are held together by

Discussion

50.	The substance which is used to catch fire due to which combustion reaction starts in Holme’s signal is:
Answer» The substance which is used to catch fire due to which combustion reaction starts in Holme’s signal is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The hydrides which are polymeric

Unsymmetrical alkane can be prepared in good yield by -

Phenol is less soluble in water.It is due to

A solution prepared by mixing 200 ml of 0.025 M CaCl2 and 400 ml of 0.15 M Na2SO4? Given Ksp of CaSO4 = 2.4 × 10−5 Then

Which of the following will undergo a faster SN1?

Pls tell me sir, E=hv is for particle or wave ?

Explain me the concept of vernier callipers with diagrams

The d and l isomer of [Co(en)3]3+ are type of:

Thermally most stable compound is:-

What is the formula of a compound in which the element Y forms HCP lattice and atoms of X occupy 23rd of tetrahedral voids?

Choose the sugars arranged in the ascending order of the number of carbon atoms they possess.

Which of the following does not have a coordinate bond

X––Mn7+2+Y––O2−7→Z––Mn4++A––O2 X,Y,Z and A are stoichiometric coefficients. Here, X,Y,Z and A are respectively

What is the difference between contact process and lead chamber process?

Which of the following carbocation is least stable

Value of i1947+i(−1947) is

Which of the following 0.10 M aqueous solution will have the lowest freezing point.

Which is the following changes does not require a reducing agent:

The freezing point of one molal NaCl solution assuming NaCl to be 100% dissociated in water is (molal depression constant = 1.86)

The radioactive decay Bi21183→Tl20781, takes place in a 100 L closed vessel at 27∘C. Starting with 2 moles of Bi21183 (t1/2 = 130 seconds), the pressure developed in the vessel after 520 seconds will be:

White phosphorus burns in a limited supply of air to form Phosphorus trioxide. When this soft white solid is burnt in plentiful supply of air, we get phosphorus __.

Although both CO2 and H2O are triatomic molecules, the shape of H2O molecule is bent while that of CO2 is linear. Explain this on the basis of dipole moment.

Mond process is used for refining:

Energy levels, A, B, C, of a certain atom correspond to increasing values of energy i.e., EA&lt;EB&lt;EC If λ1,λ2,λ3 are the wave lengths of radiations corresponding to the transition from C to B, B to A and C to A respectively, which of the following statements is correct ?

Molality (in mol/kg) of a solution in which 0.13 mole of solute is dissolved in 500 gm of water is:

The magnetic nature of [Cr(NH3)6]3+and[Co(NH3)6]3+ are

Which of the following behaves as an ambiphilic reagent?

Thermodynamic feasibility of the reaction alone cannot decide the rate of the reaction. Explain with the help of one example.

On heating in air, sodium burns violently with golden yellow flame forming

As compared to potassium, sodium has

If 2 moles of H2 and O2 are available for the reaction, identify the limiting reagent for the reaction, 2H2 + O2 → 2H2O

The most unlikely representation of resonance structures of p-nitrophenoxide ion is :

If the value of an equilibrium constant for a particular reaction is 1.6 × 1012, then at equilibrium the system will contain :

In the following reactions, the major product W is:

Enthalpy of sublimation of iodine is 8.3 kcalmol−1 at 350 K. If molar heat capacity of I2(s) and I2(vap) are 14 and 8 calmol−1 K−1 respectively, then what is entropy of sublimation of I2(s) at 400 K in calmol−1K−1? (pressure = 1 atm)

If a mixture of CO2 and N2 in equal amount exert a total pressure of 1 atm, the partial pressure of N2 in the mixture is –

Incorrect matching amongst the following is (i) Linear →H2O, SO2 (ii) V - shaped →CH2Cl2, SnCl2 (iii) See-saw shaped →SF4, TeCl4 (iv) T - shaped →ICl3, ClF3

\(N_2 ~+ ~O_2 ~\rightleftharpoons~ 2NO ~+~ (-Q cals)\) In the above reaction which is the essential condition for the higher production of NO

The ratio of Earth's orbital angular momentum (about sun) to its mass is 4.4×1015 m2s−1. The area enclosed by the earth's orbit is approximately

The wavelength of the third line of the Balmer series for a hydrogen atom is :

22.7 mL of a N10Na2CO3 solution neutralizes 10.2 mL of dilute H2SO4. Find the volume of water to be added to 400 mL of the same H2SO4 solution to make its concentration exactly N10.

Let’s try another question. Which of the following are possible wedge – dash representations for Glyceraldehyde. Assume the H and OH on the second carbon are coming out of the plane.

In physical adsorption, the gas molecules are held on solid surface by:

Consider the following species: CN+, CN–, NO and CN Which one of these will have the highest bond order?

How many names can be assigned to a hydroxyl substituted benzene dicarbonitrile?

In a crystal cations and anions are held together by

The substance which is used to catch fire due to which combustion reaction starts in Holme’s signal is:

Energy levels, A, B, C, of a certain atom correspond to increasing values of energy i.e., EA<EB<EC If λ1,λ2,λ3 are the wave lengths of radiations corresponding to the transition from C to B, B to A and C to A respectively, which of the following statements is correct ?