46295 + Interview Questions in Chemistry

1.	The electrophile involved in the above reaction is :
Answer» The electrophile involved in the above reaction is :

1.

The electrophile involved in the above reaction is :

Answer»

The electrophile involved in the above reaction is :

2.	45 g of acid of molecular weight 90 is neutralized by 200 ml of 5N caustic potash. What is the basicity of the acid?
Answer» $45 g$ of acid of molecular weight 90 is neutralized by $200 m l$ of 5N caustic potash. What is the basicity of the acid?

Discussion

3.	Select which of the option is incorrect using following diagrams: (Take z axis as inter-nuclear axis)
Answer» Select which of the option is incorrect using following diagrams: (Take z axis as inter-nuclear axis)

3.

Select which of the option is incorrect using following diagrams: (Take z axis as inter-nuclear axis)

Answer»

Select which of the option is incorrect using following diagrams:

(Take z axis as inter-nuclear axis)

Discussion

4.	When acetylene is treated with HBr,the product is:
Answer» When acetylene is treated with HBr,the product is:

Discussion

5.	In a reaction, A → Products. The concentration of A decreases from 0.5 mol L-1 to 0.3 mol L-1 in 10 min. The rate during this interval will be
Answer» In a reaction, A → Products. The concentration of A decreases from 0.5 mol L^-1 to 0.3 mol L^-1 in 10 min. The rate during this interval will be

Discussion

6.	Magnitude of H-bond is maximum in:
Answer» Magnitude of H-bond is maximum in:

Discussion

7.	In the balanced equation: I2+xO3→I4O9+O2, the 'x' is___
Answer» In the balanced equation: $I_{2} + x O_{3} \to I_{4} O_{9} + O_{2},$ the 'x' is___

Discussion

8.	Write the isomers of the compound having formula C4H9Br
Answer» Write the isomers of the compound having formula $C_{4} H_{9} B r$

Discussion

9.	Explain why is ortho nitrophenol more acidic than ortho methoxyphenol?
Answer» Explain why is ortho nitrophenol more acidic than ortho methoxyphenol?

Discussion

10.	Bismuth chloride on hydrolysis forms a white ppt of
Answer» Bismuth chloride on hydrolysis forms a white ppt of

Discussion

11.	A solution containing 30 gms of non-volatile solute in exactly 90 gm water has a vapour pressure of 21.85 mm Hg at 250C. Further 18 gms of water is then added to the solution. The resulting solution has a vapour pressure of 22.15 mm Hg at 250C. Calculate the molecular weight of the solute.
Answer» A solution containing 30 gms of non-volatile solute in exactly 90 gm water has a vapour pressure of 21.85 mm Hg at 25⁰C. Further 18 gms of water is then added to the solution. The resulting solution has a vapour pressure of 22.15 mm Hg at 25⁰C. Calculate the molecular weight of the solute.

Discussion

12.	Crown ether-metal ion complex are called as
Answer» Crown ether-metal ion complex are called as

Discussion

13.	To achieve the above conversion, the reagents used will be:
Answer» To achieve the above conversion, the reagents used will be:

Discussion

14.	Zn\|ZnSO4(0.01M)\|\|CuSO4(1.0M)\|Cu The emf of the cell is E1. When the concentration of ZnSO4 is changed to 1.0 M and that of CuSO4 changed to 0.01 M, the emf changes to E2. From the following, which one is the relationship between E1 and E2? (Given, RTF=0.059)
Answer» $Z n \| Z n S O_{4} (0.01 M) \| \| C u S O_{4} (1.0 M) \| C u$ The emf of the cell is $E_{1}$ . When the concentration of $Z n S O_{4}$ is changed to $1.0 M$ and that of $C u S O_{4}$ changed to $0.01 M$ , the emf changes to $E_{2}$ . From the following, which one is the relationship between $E_{1}$ and $E_{2}$ ? (Given, $\frac{R T}{F} = 0.059)$

Discussion

15.	The increasing order of acidic nature of the following oxides is
Answer» The increasing order of acidic nature of the following oxides is

Discussion

16.	100 ml of a gas occupies a pressure of 720 mm of Hg. At what pressure will the same gas occupy a volume of 84 ml?
Answer» 100 ml of a gas occupies a pressure of 720 mm of Hg. At what pressure will the same gas occupy a volume of 84 ml?

Discussion

17.	The compound C3H4 has triple bond, which is indicated by its reaction with
Answer» The compound $C_{3} H_{4}$ has triple bond, which is indicated by its reaction with

Discussion

18.	A compound A with molecular formula C10H13Cl gives a white precipitate on adding silver nitrate solution. A on reacting with alcoholic KOH gives compound B as the main product. B on ozonolysis gives C and D. C gives Cannizaro reaction but not alodol condensation. D gives aldol condensation but not Cannizaro reaction. A is:
Answer» A compound A with molecular formula $C_{10} H_{13} C l$ gives a white precipitate on adding silver nitrate solution. A on reacting with alcoholic KOH gives compound B as the main product. B on ozonolysis gives C and D. C gives Cannizaro reaction but not alodol condensation. D gives aldol condensation but not Cannizaro reaction. A is:

Discussion

19.	The following reaction is known as:
Answer» The following reaction is known as:

Discussion

20.	Which of the following solutions will have the highest specific conductance?
Answer» Which of the following solutions will have the highest specific conductance?

Discussion

21.	The equivalent conductivity of acetic acid at infinite dilution is 390.6 Scm2eqv−1 and for a certain concentration C of acetic acid solution it is 78.12 Scm2eqv−1. The osmotic pressure of the same solution with concentration C of acetic acid is found to be 14.76 atm at 300 K. What is the value of C? (Take R= 0.082 atm-L/molK)
Answer» The equivalent conductivity of acetic acid at infinite dilution is $390.6 S c m^{2} e q v^{- 1}$ and for a certain concentration C of acetic acid solution it is $78.12 S c m^{2} e q v^{- 1}$ . The osmotic pressure of the same solution with concentration C of acetic acid is found to be 14.76 atm at 300 K. What is the value of C? (Take R= 0.082 atm-L/molK)

Discussion

22.	Chemical formula for calcium pyrophosphate is Ca2P2O7 The formula for ferric pyrophosphate will be
Answer» Chemical formula for calcium pyrophosphate is $C a_{2} P_{2} O_{7}$ The formula for ferric pyrophosphate will be

Discussion

23.	A sample of Ne is originally 20% by moles Ne20 isotope and the rest is Ne24 isotopes. In how many steps of effusion can a 33.33% ratio of Ne20 be achieved?
Answer» A sample of $N e$ is originally 20% by moles $N e^{20}$ isotope and the rest is $N e^{24}$ isotopes. In how many steps of effusion can a 33.33% ratio of $N e^{20}$ be achieved?

Discussion

24.	The general formula of silicones is
Answer» The general formula of silicones is

Discussion

25.	KClO3 on heating decomposes to give KCl and Oxygen. What is the volume of oxygen liberated at NTP by 0.1mol of KClO3?
Answer» KClO3 on heating decomposes to give KCl and Oxygen. What is the volume of oxygen liberated at NTP by 0.1mol of KClO3?

Discussion

26.	Discuss, in brief, the possibility of development of non-conventional energy.
Answer» Discuss, in brief, the possibility of development of non-conventional energy.

Discussion

27.	A metal is burnt in air and the ash on moistening smells of ammonia. The metal is
Answer» A metal is burnt in air and the ash on moistening smells of ammonia. The metal is

Discussion

28.	For 10th grade (1) Could you explain aboutabout the potential difference in the circuit? (Provide an image if possible) (2) What is delocalisation? I've heard this term in chemistry, so is it similar?
Answer» For 10th grade (1) Could you explain aboutabout the potential difference in the circuit? (Provide an image if possible) (2) What is delocalisation? I've heard this term in chemistry, so is it similar?

Discussion

29.	Depict the galvanic cell in which the reaction, Zn(s)+2Ag+(aq)→Zn2+(aq)+2Ag(s) takes place . Further show : Which of the electrode is negatively charged The carriers of the current in the cell Individual reaction at each electrode
Answer» Depict the galvanic cell in which the reaction, $Z n (s) + 2 A g^{+} (a q) \to Z n^{2 +} (a q) + 2 A g (s)$ takes place . Further show : Which of the electrode is negatively charged The carriers of the current in the cell Individual reaction at each electrode

29.

Depict the galvanic cell in which the reaction, Zn(s)+2Ag+(aq)→Zn2+(aq)+2Ag(s) takes place . Further show : Which of the electrode is negatively charged The carriers of the current in the cell Individual reaction at each electrode

Answer»

Depict the galvanic cell in which the reaction, $Z n (s) + 2 A g^{+} (a q) \to Z n^{2 +} (a q) + 2 A g (s)$ takes place . Further show :

Which of the electrode is negatively charged

The carriers of the current in the cell

Individual reaction at each electrode

Discussion

30.	Define electronegativity. How does it differ from electron gain enthalpy?
Answer» Define electronegativity. How does it differ from electron gain enthalpy?

Discussion

31.	A polyatomic gas with six degrees of freedom does 25 J of work when it is expanded at constant pressure. The heat given to the gas is
Answer» A polyatomic gas with six degrees of freedom does $25 J$ of work when it is expanded at constant pressure. The heat given to the gas is

Discussion

32.	The species that contains 24 protons, 26 neutrons and 22 electrons would be represented by the symbol:
Answer» The species that contains 24 protons, 26 neutrons and 22 electrons would be represented by the symbol:

Discussion

33.	What is the role of zinc metal in the extraction of silver?
Answer» What is the role of zinc metal in the extraction of silver?

Discussion

34.	Which of the following has unstable enol form?
Answer» Which of the following has unstable enol form?

Discussion

35.	Which is the major monobromination product when ethylcyclohexane is subjected to free radical bromination?
Answer» Which is the major monobromination product when ethylcyclohexane is subjected to free radical bromination?

Discussion

36.	What volume of air at 1 atm and 273 K containing 21% of oxygen by volume is required to completely burn sulphur (S8) present in 200 g of sample, which contains 20% inert material which does not burn. Sulpur burns according to the reaction 18S8(s)+O2(g)→SO2(g)
Answer» What volume of air at $1 a t m$ and $273 K$ containing 21% of oxygen by volume is required to completely burn sulphur $(S_{8})$ present in $200 g$ of sample, which contains $20 %$ inert material which does not burn. Sulpur burns according to the reaction $\frac{1}{8} S_{8} (s) + O_{2} (g) \to S O_{2} (g)$

Discussion

37.	One mole of a monatomic ideal gas is taken through a cycle ABCDA as shown in the PV diagram. Column II gives the characteristics involved in the cycle. Match them with each of the processes given in Column I. Given Process DA is isothermal. Column IColumn IIA) Process A → Bp) Internal energy decreases.B) Process B → Cq) Internal energy increases.C) Process C → Dr) Heat is lostD) Process D → As) Heat is gained.t) Work is done one the gas.
Answer» One mole of a monatomic ideal gas is taken through a cycle ABCDA as shown in the PV diagram. Column II gives the characteristics involved in the cycle. Match them with each of the processes given in Column I. Given Process DA is isothermal. $\begin{matrix} Column I & Column II A) Process A \to B & p) Internal energy decreases. B) Process B \to C & q) Internal energy increases. C) Process C \to D & r) Heat is lost D) Process D \to A & s) Heat is gained. t) Work is done one the gas. \end{matrix}$

Discussion

38.	0.56 litre each of three samples of H2O2 labelled as 10 vol, 15 vol and 20 vol are mixed. The resultant normality of H2O2 solution is:
Answer» $0.56$ litre each of three samples of $H_{2} O_{2}$ labelled as $10 v o l, 15 v o l$ and $20 v o l$ are mixed. The resultant normality of $H_{2} O_{2}$ solution is:

Discussion

39.	1 dm3 of an ideal gas at a pressure of 10 bar expands reversibly and isothermally to final volume of 20 litre. What will be the magnitude of heat involved in the process (in kJ)? (Take ln 20 = 3)
Answer» $1 d m^{3}$ of an ideal gas at a pressure of 10 bar expands reversibly and isothermally to final volume of 20 litre. What will be the magnitude of heat involved in the process (in kJ)? (Take ln 20 = 3)

Discussion

40.	The equilibrium, NH4HS(s)⇌NH3(g)+H2S(g), is followed to set-up at 127 ∘C in a closed vessel. The total pressure at equilibrium was 20 atm. The Kc for the reaction is: (Given R=0.08 L atm K−1 mol−1)
Answer» The equilibrium, $N H_{4} H S (s) ⇌ N H_{3} (g) + H_{2} S (g)$ , is followed to set-up at $127^{\circ} C$ in a closed vessel. The total pressure at equilibrium was $20 atm$ . The $K_{c}$ for the reaction is: (Given $R = 0.08 {L atm K}^{- 1} {mol}^{- 1}$ )

Discussion

41.	Which of the following alkali metals have the least ionization enthalpy?
Answer» Which of the following alkali metals have the least ionization enthalpy?

Discussion

42.	For the hypothetical reaction A2(g) + B2(g) ⇌ 2AB(g) ΔrG∘ and ΔrS∘ are 20 kJ/mol and −20JK−1 mol−1 respectively at 200K. If ΔrCp is 20 JK−1 mol−1 then ΔrH∘ at 400K is
Answer» For the hypothetical reaction $A_{2} (g) + B_{2} (g) ⇌ 2 A B (g) Δ_{r} G^{\circ}$ and $Δ_{r} S^{\circ}$ are $20 k J / m o l$ and $- 20 J K^{- 1} m o l^{- 1}$ respectively at $200 K$ . If $Δ_{r} C^{p}$ is $20 J K^{- 1} m o l^{- 1}$ then $Δ_{r} H^{\circ}$ at $400 K$ is

Discussion

43.	Why is an electric field inside a cylindrical capacitor not uniform?
Answer» Why is an electric field inside a cylindrical capacitor not uniform?

Discussion

44.	At time t=0, a battery of 10 V is connected across point A and B in the given circuit. If the capacitors have no charge initially, the time (in seconds) at which the voltage across them becomes 4 V is (answer upto two decimal places) [Take ln5=1.6 , ln3=1.1]
Answer» At time $t = 0$ , a battery of 10 V is connected across point A and B in the given circuit. If the capacitors have no charge initially, the time (in seconds) at which the voltage across them becomes 4 V is (answer upto two decimal places) $[Take ln 5 = 1.6, ln 3 = 1.1]$

Discussion

45.	The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is: (a0 is bohr radius)
Answer» The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is: ( $a_{0}$ is bohr radius)

Discussion

46.	What is the number of tetrahedral voids in FCC Unit cell? ___
Answer» What is the number of tetrahedral voids in FCC Unit cell? ___

46.

What is the number of tetrahedral voids in FCC Unit cell? ___

Answer»

What is the number of tetrahedral voids in FCC Unit cell?

___

Discussion

47.	Why is benzene extraordinarily stable though it contains 3 double bonds?
Answer» Why is benzene extraordinarily stable though it contains 3 double bonds?

Discussion

48.	Benzene and toluene form nearly ideal solution .At 313K the vapour pressure of pure benzene is 150mm Hg and of pure toluene is 50 mm Hg .calculate vapour pressure of mixture of these two containing their equal masses at 313 K .
Answer» Benzene and toluene form nearly ideal solution .At 313K the vapour pressure of pure benzene is 150mm Hg and of pure toluene is 50 mm Hg .calculate vapour pressure of mixture of these two containing their equal masses at 313 K .

Discussion

49.	A Boron mineral have pentaborate anion whose molecular formula is [B5O6(OH)4]−. The number of B−O−B linkage present in one molecule of the mineral are
Answer» A Boron mineral have pentaborate anion whose molecular formula is $[B_{5} O_{6} (O H)_{4}]^{-}$ . The number of $B - O - B$ linkage present in one molecule of the mineral are

Discussion

50.	Binding energy per nucleon for deuteron 1H2 is 1.1 MeV and that for helium 2He4 is 7 MeV respectively. Energy released in MeV when two deutrons fuse to form a helium nucleus 2He4 is (Write upto two difgits after the decimal point.)
Answer» Binding energy per nucleon for deuteron $_{1} H^{2}$ is 1.1 MeV and that for helium $_{2} H e^{4}$ is 7 MeV respectively. Energy released in MeV when two deutrons fuse to form a helium nucleus $_{2} H e^{4}$ is (Write upto two difgits after the decimal point.)

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The electrophile involved in the above reaction is :

45 g of acid of molecular weight 90 is neutralized by 200 ml of 5N caustic potash. What is the basicity of the acid?

Select which of the option is incorrect using following diagrams: (Take z axis as inter-nuclear axis)

When acetylene is treated with HBr,the product is:

In a reaction, A → Products. The concentration of A decreases from 0.5 mol L-1 to 0.3 mol L-1 in 10 min. The rate during this interval will be

Magnitude of H-bond is maximum in:

In the balanced equation: I2+xO3→I4O9+O2, the 'x' is___

Write the isomers of the compound having formula C4H9Br

Explain why is ortho nitrophenol more acidic than ortho methoxyphenol?

Bismuth chloride on hydrolysis forms a white ppt of

A solution containing 30 gms of non-volatile solute in exactly 90 gm water has a vapour pressure of 21.85 mm Hg at 250C. Further 18 gms of water is then added to the solution. The resulting solution has a vapour pressure of 22.15 mm Hg at 250C. Calculate the molecular weight of the solute.

Crown ether-metal ion complex are called as

To achieve the above conversion, the reagents used will be:

Zn|ZnSO4(0.01M)||CuSO4(1.0M)|Cu The emf of the cell is E1. When the concentration of ZnSO4 is changed to 1.0 M and that of CuSO4 changed to 0.01 M, the emf changes to E2. From the following, which one is the relationship between E1 and E2? (Given, RTF=0.059)

The increasing order of acidic nature of the following oxides is

100 ml of a gas occupies a pressure of 720 mm of Hg. At what pressure will the same gas occupy a volume of 84 ml?

The compound C3H4 has triple bond, which is indicated by its reaction with

The following reaction is known as:

Which of the following solutions will have the highest specific conductance?

Chemical formula for calcium pyrophosphate is Ca2P2O7 The formula for ferric pyrophosphate will be

A sample of Ne is originally 20% by moles Ne20 isotope and the rest is Ne24 isotopes. In how many steps of effusion can a 33.33% ratio of Ne20 be achieved?

The general formula of silicones is

KClO3 on heating decomposes to give KCl and Oxygen. What is the volume of oxygen liberated at NTP by 0.1mol of KClO3?

Discuss, in brief, the possibility of development of non-conventional energy.

A metal is burnt in air and the ash on moistening smells of ammonia. The metal is

*For 10th grade* (1) Could you explain aboutabout the potential difference in the circuit? (Provide an image if possible) (2) What is delocalisation? I've heard this term in chemistry, so is it similar?

Depict the galvanic cell in which the reaction, Zn(s)+2Ag+(aq)→Zn2+(aq)+2Ag(s) takes place . Further show : Which of the electrode is negatively charged The carriers of the current in the cell Individual reaction at each electrode

Define electronegativity. How does it differ from electron gain enthalpy?

A polyatomic gas with six degrees of freedom does 25 J of work when it is expanded at constant pressure. The heat given to the gas is

The species that contains 24 protons, 26 neutrons and 22 electrons would be represented by the symbol:

What is the role of zinc metal in the extraction of silver?

Which of the following has unstable enol form?

Which is the major monobromination product when ethylcyclohexane is subjected to free radical bromination?

What volume of air at 1 atm and 273 K containing 21% of oxygen by volume is required to completely burn sulphur (S8) present in 200 g of sample, which contains 20% inert material which does not burn. Sulpur burns according to the reaction 18S8(s)+O2(g)→SO2(g)

0.56 litre each of three samples of H2O2 labelled as 10 vol, 15 vol and 20 vol are mixed. The resultant normality of H2O2 solution is:

1 dm3 of an ideal gas at a pressure of 10 bar expands reversibly and isothermally to final volume of 20 litre. What will be the magnitude of heat involved in the process (in kJ)? (Take ln 20 = 3)

The equilibrium, NH4HS(s)⇌NH3(g)+H2S(g), is followed to set-up at 127 ∘C in a closed vessel. The total pressure at equilibrium was 20 atm. The Kc for the reaction is: (Given R=0.08 L atm K−1 mol−1)

Which of the following alkali metals have the least ionization enthalpy?

For the hypothetical reaction A2(g) + B2(g) ⇌ 2AB(g) ΔrG∘ and ΔrS∘ are 20 kJ/mol and −20JK−1 mol−1 respectively at 200K. If ΔrCp is 20 JK−1 mol−1 then ΔrH∘ at 400K is

Why is an electric field inside a cylindrical capacitor not uniform?

At time t=0, a battery of 10 V is connected across point A and B in the given circuit. If the capacitors have no charge initially, the time (in seconds) at which the voltage across them becomes 4 V is (answer upto two decimal places) [Take ln5=1.6 , ln3=1.1]

The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is: (a0 is bohr radius)​

What is the number of tetrahedral voids in FCC Unit cell? ___

Why is benzene extraordinarily stable though it contains 3 double bonds?

Benzene and toluene form nearly ideal solution .At 313K the vapour pressure of pure benzene is 150mm Hg and of pure toluene is 50 mm Hg .calculate vapour pressure of mixture of these two containing their equal masses at 313 K .

A Boron mineral have pentaborate anion whose molecular formula is [B5O6(OH)4]−. The number of B−O−B linkage present in one molecule of the mineral are

Binding energy per nucleon for deuteron 1H2 is 1.1 MeV and that for helium 2He4 is 7 MeV respectively. Energy released in MeV when two deutrons fuse to form a helium nucleus 2He4 is (Write upto two difgits after the decimal point.)

For 10th grade (1) Could you explain aboutabout the potential difference in the circuit? (Provide an image if possible) (2) What is delocalisation? I've heard this term in chemistry, so is it similar?

The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is: (a0 is bohr radius)