46295 + Interview Questions in Chemistry

1.	Match the followings List-IList-II(I)Cathode rays(P)Helium nuclei(II)Alpha particles(Q)Uncertainty principle(III)J.J. Thomson(R)Electromagnetic radiation(IV)X-rays(S)Plum Pudding Model(T)Atomic number(U)Electrons
Answer» Match the followings $\begin{matrix} List-I & List-II (I) & Cathode rays & (P) & Helium nuclei (I I) & Alpha particles & (Q) & Uncertainty principle (I I I) & J.J. Thomson & (R) & Electromagnetic radiation (I V) & X-rays & (S) & Plum Pudding Model (T) & Atomic number (U) & Electrons \end{matrix}$

Discussion

2.	If R=C2H5, the correct order of basic character of ethyl substituted amines in aqueous medium is:
Answer» If $R = C_{2} H_{5},$ the correct order of basic character of ethyl substituted amines in aqueous medium is:

Discussion

3.	(a) Account for the following : (i) Interhalogens are more reactive than pure halogens. (ii) N2 is less reactive at room temperature. (iii) Reducing character increases from NH3 to BiH3. (b) Draw the structures of the following : (i) H4P2O7 (Pyrophosphoric acid) (ii) XeF4
Answer» (a) Account for the following : (i) Interhalogens are more reactive than pure halogens. (ii) $N_{2}$ is less reactive at room temperature. (iii) Reducing character increases from $N H_{3}$ to $B i H_{3}$ . (b) Draw the structures of the following : $(i) H_{4} P_{2} O_{7}$ (Pyrophosphoric acid) $(i i) X e F_{4}$

Discussion

4.	Consider the sequence of reactions and choose the major product:
Answer» Consider the sequence of reactions and choose the major product:

Discussion

5.	For a 0.01 M solution of carbonic acid, the concentration of CO2−3 would be: Given: pH of the solution is 4.18. Ka1 for H2CO3=4.45×10−7 Ka2 for H2CO3=4.69×10−11 Take 10−4.18=6.6×10−5
Answer» For a 0.01 M solution of carbonic acid, the concentration of $C O_{3}^{2 -}$ would be: Given: pH of the solution is 4.18. $K_{a 1} f o r H_{2} C O_{3} = 4.45 \times 10^{- 7}$ $K_{a 2} f o r H_{2} C O_{3} = 4.69 \times 10^{- 11}$ Take $10^{- 4.18} = 6.6 \times 10^{- 5}$

Discussion

6.	Target of a coolidge tube contains two impurities. Atomic number of the target is Z and that of 1st and 2nd impurities is Z1 and Z2. Wavelength of Kα lines of target is λ and that of impurities are λ1 and λ2 where, λλ1=4 and λλ2=14, then
Answer» Target of a coolidge tube contains two impurities. Atomic number of the target is Z and that of $1^{s t}$ and $2^{n d}$ impurities is $Z_{1} and Z_{2} .$ Wavelength of $K_{α}$ lines of target is $λ$ and that of impurities are $λ_{1}$ and $λ_{2}$ where, $\frac{λ}{λ_{1}} = 4$ and $\frac{λ}{λ_{2}} = \frac{1}{4}$ , then

Discussion

7.	Classify NaCl,O2,kCl,BF3,PCl5 molecules in to those obeying octet rule and those not obeying octet rule?
Answer» Classify NaCl,O2,kCl,BF3,PCl5 molecules in to those obeying octet rule and those not obeying octet rule?

Discussion

8.	In a closed system A(s) gives 2B(g) +3C (g) if the partial pressure of c is doubled then the partial pressure of b will be
Answer» In a closed system A(s) gives 2B(g) +3C (g) if the partial pressure of c is doubled then the partial pressure of b will be

Discussion

9.	Calculate the osmotic pressure at 27∘ C of an aqueous solution, containing 4.4 g of glucose per 100 ml solution.
Answer» Calculate the osmotic pressure at $27^{\circ} C$ of an aqueous solution, containing 4.4 g of glucose per 100 ml solution.

Discussion

10.	Among the following which species has same number of σ and π bonds.
Answer» Among the following which species has same number of $σ$ and $π$ bonds.

Discussion

11.	The ground state electron configuration of Fe is:
Answer» The ground state electron configuration of Fe is:

Discussion

12.	6×10−3molK2Cr2O7reacts completely with 9×10−3 mol Xn to give XO−3 and Cr+3 The valve of n is:
Answer» 6 $\times$ $10^{- 3}$ mol $K_{2} C r_{2} O_{7}$ reacts completely with 9 $\times$ $10^{- 3}$ mol $X^{n}$ to give $X O_{3}^{-}$ and $C r^{+ 3}$ The valve of n is:

Discussion

13.	What is the major product of the following synthesis?
Answer» What is the major product of the following synthesis?

Discussion

14.	The enthalpy change for the reaction, C2H4(g) + 3O2(g) ⟶2CO2(g) + 2H2O(g) is called:
Answer» The enthalpy change for the reaction, $C_{2} H_{4} (g) + 3 O_{2} (g) ⟶ 2 C O_{2} (g) + 2 H_{2} O (g)$ is called:

Discussion

15.	calculate the angular momentum in 5th Orbit of hydrogen atom
Answer» calculate the angular momentum in 5th Orbit of hydrogen atom

Discussion

16.	Sir/Madam In the structure of copper sulphate(CuSO4.5H2o),4 water molecules are coordinated and 1 is hydrogen bonded. The electronic configuration of Cu is [Ar]4s1 3d10 . When the water molecules are sharing 8 electrons, it becomes 4s2 3d10 4p6 5s1. When cu becomes cu2+ion, the configuration becomes 4s2 3d10 4p5. But these 2 configurations aren't stable. Then why did cuso4.5h2o occurs at a reasonably good amount in nature. Kindly explain in "detail"?
Answer» Sir/Madam In the structure of copper sulphate(CuSO4.5H2o),4 water molecules are coordinated and 1 is hydrogen bonded. The electronic configuration of Cu is [Ar]4s¹3d¹⁰. When the water molecules are sharing 8 electrons, it becomes 4s2 3d10 4p6 5s1. When cu becomes cu2+ion, the configuration becomes 4s2 3d10 4p5. But these 2 configurations aren't stable. Then why did cuso4.5h2o occurs at a reasonably good amount in nature. Kindly explain in "detail"?

16.

Sir/Madam In the structure of copper sulphate(CuSO4.5H2o),4 water molecules are coordinated and 1 is hydrogen bonded. The electronic configuration of Cu is [Ar]4s1 3d10 . When the water molecules are sharing 8 electrons, it becomes 4s2 3d10 4p6 5s1. When cu becomes cu2+ion, the configuration becomes 4s2 3d10 4p5. But these 2 configurations aren't stable. Then why did cuso4.5h2o occurs at a reasonably good amount in nature. Kindly explain in "detail"?

Answer»

Sir/Madam

In the structure of copper sulphate(CuSO4.5H2o),4 water molecules are coordinated and 1 is hydrogen bonded. The electronic configuration of Cu is [Ar]4s¹3d¹⁰. When the water molecules are sharing 8 electrons, it becomes 4s2 3d10 4p6 5s1. When cu becomes cu2+ion, the configuration becomes 4s2 3d10 4p5. But these 2 configurations aren't stable. Then why did cuso4.5h2o occurs at a reasonably good amount in nature. Kindly explain in "detail"?

Discussion

17.	Why Peroxide Effect or Kharasch effect is applicable only to addition of HBr???
Answer» Why Peroxide Effect or Kharasch effect is applicable only to addition of HBr???

Discussion

18.	Which of the following statements is not true about NaCl structure [DCE 2001]
Answer» Which of the following statements is not true about NaCl structure [DCE 2001]

18.

Which of the following statements is not true about NaCl structure [DCE 2001]

Answer»

Which of the following statements is not true about NaCl structure

[DCE 2001]

Discussion

19.	The number of atom in 100g of an FCC crystal with density d=10g/cm3 and cell edge equal to 100 pm is equal to
Answer» The number of atom in 100g of an FCC crystal with density d=10g/cm3 and cell edge equal to 100 pm is equal to

Discussion

20.	Benzene reacts with acetyl chloride in the presence of AlCl3 to give:
Answer» Benzene reacts with acetyl chloride in the presence of AlCl₃ to give:

Discussion

21.	Benzonitrile is the IUPAC name of the compound:
Answer» Benzonitrile is the IUPAC name of the compound:

Discussion

22.	When stearic acid reacts with polyethylene glycol what type of detergent is formed?
Answer» When stearic acid reacts with polyethylene glycol what type of detergent is formed?

Discussion

23.	For a 3d-orbital, the orbital angular momentum is
Answer» For a 3d-orbital, the orbital angular momentum is

Discussion

24.	In the above reaction Y can be
Answer» In the above reaction Y can be

24.

In the above reaction Y can be

Answer»

In the above reaction Y can be

Discussion

25.	Which of the following pair will not produce dihydrogen gas?
Answer» Which of the following pair will not produce dihydrogen gas?

Discussion

26.	What is the work done in an adiabatic process?
Answer» What is the work done in an adiabatic process?

Discussion

27.	C2H5Cl+NaDry ether−−−−−−→X+NaCl Number of possible structural and stereo isomers for mono chloro derivatives of 'X' are
Answer» $C_{2} H_{5} C l + N a D r y e t h e r - ----- \to X + N a C l$ Number of possible structural and stereo isomers for mono chloro derivatives of 'X' are

Discussion

28.	Dipole moment of a certain diatomic molecule X-Y is 0.38 D. If X-Y bond length is 158 pm, the percentage of electronic charge developed on ‘X’ atom is: ___
Answer» Dipole moment of a certain diatomic molecule X-Y is 0.38 D. If X-Y bond length is 158 pm, the percentage of electronic charge developed on ‘X’ atom is: ___

Discussion

29.	Oxygen exhibits positive oxidation state in
Answer» Oxygen exhibits positive oxidation state in

Discussion

30.	The correct order of increasing thermal stability of K2CO3,MgCO3,CaCO3 and BeCO3 is:
Answer» The correct order of increasing thermal stability of $K_{2} C O_{3}, M g C O_{3}, C a C O_{3}$ and $B e C O_{3}$ is:

Discussion

31.	The ratio of rates of diffusion of SO2,O2 and CH4 is .....
Answer» The ratio of rates of diffusion of $S O_{2}, O_{2} a n d C H_{4}$ is .....

Discussion

32.	ΔH<ΔE for the reaction:
Answer» $Δ H < Δ E$ for the reaction:

Discussion

33.	Ionization potential is lowest for
Answer» Ionization potential is lowest for

33.

Ionization potential is lowest for

Answer»

Ionization potential is lowest for

Discussion

34.	Wat r regulatory genes ?
Answer» Wat r regulatory genes ?

Discussion

35.	An aqueous solution of salt of sodium (NaX) on boiling with MgCI2 gives white precipitate, hence anion X is:
Answer» An aqueous solution of salt of sodium (NaX) on boiling with $M g C I_{2}$ gives white precipitate, hence anion X is:

Discussion

36.	Suppose, in your lab, you have run out of dilute Sulphuric acid. You require dilute H2SO4 for an important synthesis but only have concentrated Sulphuric acid, water and a glass beaker. How will you synthesize dilute H2SO4 ?
Answer» Suppose, in your lab, you have run out of dilute Sulphuric acid. You require dilute $H_{2} S O_{4}$ for an important synthesis but only have concentrated Sulphuric acid, water and a glass beaker. How will you synthesize dilute $H_{2} S O_{4}$ ?

Discussion

37.	Why radius of alpha particle is more than radius of He+ ?
Answer» Why radius of alpha particle is more than radius of He+ ?

Discussion

38.	Calculate the number of oxygen molecules required to combine with 7g of N2 to form N2O3 when 80% of N2 is converted to N2O3.
Answer» Calculate the number of oxygen molecules required to combine with 7g of $N_{2}$ to form $N_{2} O_{3}$ when $80 %$ of $N_{2}$ is converted to $N_{2} O_{3}$ .

Discussion

39.	For a first order reaction, t0.75 is 138.6 seconds. Its specific rate constant (in s−1) is:
Answer» For a first order reaction, $t_{0.75}$ is 138.6 seconds. Its specific rate constant (in $s^{- 1}$ ) is:

Discussion

40.	The freezing point of an aqueous solution of NaHSO4 is −0.372 oC. The dissociation constant for the reaction HSO−4→H++SO−24 is 0.4. Find the concentration of NaHSO4 in mol/kg. [Kf for H2O=1.86 Kkgmol–1] (Assume dilute solution and take molality = molarity)
Answer» The freezing point of an aqueous solution of $N a H S O_{4}$ is $- 0.372^{o} C$ . The dissociation constant for the reaction $H S O_{4}^{-} \to H^{+} + S O_{4}^{- 2}$ is 0.4. Find the concentration of $N a H S O_{4}$ in mol/kg. [ $K_{f} f o r H_{2} O = 1.86 K k g m o l^{- 1}$ ] (Assume dilute solution and take molality = molarity)

Discussion

41.	What will be the electrode potential for the given half cell reaction at pH= 5?(R=8.314 J mol-1K-1; temp.=298 K; oxygen under std. atm. The pressure of 1 bar.)
Answer» What will be the electrode potential for the given half cell reaction at pH= 5? (R=8.314 J mol^-1K^-1; temp.=298 K; oxygen under std. atm. The pressure of 1 bar.)

41.

What will be the electrode potential for the given half cell reaction at pH= 5?(R=8.314 J mol-1K-1; temp.=298 K; oxygen under std. atm. The pressure of 1 bar.)

Answer»

What will be the electrode potential for the given half cell reaction at pH= 5?

(R=8.314 J mol^-1K^-1; temp.=298 K; oxygen under std. atm. The pressure of 1 bar.)

Discussion

42.	Which of the following molecule has bond order 1/2?
Answer» Which of the following molecule has bond order 1/2?

Discussion

43.	What happens when K2Cr2O7 is treated with KI?
Answer» What happens when K₂Cr₂O₇ is treated with KI?

Discussion

44.	The decomposition of hydrocarbon follows the equation k=(4.5×1011s−1)e−28000 K/T. Calculate the activation energy Ea
Answer» The decomposition of hydrocarbon follows the equation $k = (4.5 \times 10^{11} s^{- 1}) e^{- 28000} K / T$ . Calculate the activation energy $E_{a}$

Discussion

45.	A sample of 1.0 mol of a monoatomic ideal gas is taken through a cyclic process of expansion and compression as shown in figure. What will be the value of ΔH for the cycle as a whole?
Answer» A sample of 1.0 mol of a monoatomic ideal gas is taken through a cyclic process of expansion and compression as shown in figure. What will be the value of $Δ H$ for the cycle as a whole?

Discussion

46.	Which of the following will not be oxidized by ozone?
Answer» Which of the following will not be oxidized by ozone?

Discussion

47.	ClCH2CHCl2alc. KOH−−−−−→A A is:
Answer» $C l C H_{2} C H C l_{2} alc. KOH - ---- \to A$ A is:

Discussion

48.	Setting of plaster of paris is
Answer» Setting of plaster of paris is

Discussion

49.	Among the second period elements the actual ionization enthalpies are in the order Li < B < Be < C < O < N < F < Ne. Explain why (i) Be has higher ∆iH than B (ii)O has lower ΔiH than N and F?
Answer» Among the second period elements the actual ionization enthalpies are in the order Li < B < Be < C < O < N < F < Ne. Explain why (i) Be has higher ∆iH than B (ii)O has lower $Δ i H$ than N and F?

49.

Among the second period elements the actual ionization enthalpies are in the order Li < B < Be < C < O < N < F < Ne. Explain why (i) Be has higher ∆iH than B (ii)O has lower ΔiH than N and F?

Answer»

Among the second period elements the actual ionization enthalpies are in the order Li < B < Be < C < O < N < F < Ne. Explain why

(i) Be has higher ∆iH than B

(ii)O has lower $Δ i H$ than N and F?

Discussion

50.	Low level of noradrenaline is the cause of depression. What types of drugs are needed to cure this problem? Name two drugs.
Answer» Low level of noradrenaline is the cause of depression. What types of drugs are needed to cure this problem? Name two drugs.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Match the followings List-IList-II(I)Cathode rays(P)Helium nuclei(II)Alpha particles(Q)Uncertainty principle(III)J.J. Thomson(R)Electromagnetic radiation(IV)X-rays(S)Plum Pudding Model(T)Atomic number(U)Electrons

If R=C2H5, the correct order of basic character of ethyl substituted amines in aqueous medium is:

(a) Account for the following : (i) Interhalogens are more reactive than pure halogens. (ii) N2 is less reactive at room temperature. (iii) Reducing character increases from NH3 to BiH3. (b) Draw the structures of the following : (i) H4P2O7 (Pyrophosphoric acid) (ii) XeF4

Consider the sequence of reactions and choose the major product:

For a 0.01 M solution of carbonic acid, the concentration of CO2−3 would be: Given: pH of the solution is 4.18. Ka1 for H2CO3=4.45×10−7 Ka2 for H2CO3=4.69×10−11 Take 10−4.18=6.6×10−5

Target of a coolidge tube contains two impurities. Atomic number of the target is Z and that of 1st and 2nd impurities is Z1 and Z2. Wavelength of Kα lines of target is λ and that of impurities are λ1 and λ2 where, λλ1=4 and λλ2=14, then

Classify NaCl,O2,kCl,BF3,PCl5 molecules in to those obeying octet rule and those not obeying octet rule?

In a closed system A(s) gives 2B(g) +3C (g) if the partial pressure of c is doubled then the partial pressure of b will be

Calculate the osmotic pressure at 27∘ C of an aqueous solution, containing 4.4 g of glucose per 100 ml solution.

Among the following which species has same number of σ and π bonds.

The ground state electron configuration of Fe is:

6×10−3molK2Cr2O7reacts completely with 9×10−3 mol Xn to give XO−3 and Cr+3 The valve of n is:

What is the major product of the following synthesis?

The enthalpy change for the reaction, C2H4(g) + 3O2(g) ⟶2CO2(g) + 2H2O(g) is called:

calculate the angular momentum in 5th Orbit of hydrogen atom

Why Peroxide Effect or Kharasch effect is applicable only to addition of HBr???

Which of the following statements is not true about NaCl structure [DCE 2001]

The number of atom in 100g of an FCC crystal with density d=10g/cm3 and cell edge equal to 100 pm is equal to

Benzene reacts with acetyl chloride in the presence of AlCl3 to give:

Benzonitrile is the IUPAC name of the compound:

When stearic acid reacts with polyethylene glycol what type of detergent is formed?

For a 3d-orbital, the orbital angular momentum is

In the above reaction Y can be

Which of the following pair will not produce dihydrogen gas?

What is the work done in an adiabatic process?

C2H5Cl+NaDry ether−−−−−−→X+NaCl Number of possible structural and stereo isomers for mono chloro derivatives of 'X' are

Dipole moment of a certain diatomic molecule X-Y is 0.38 D. If X-Y bond length is 158 pm, the percentage of electronic charge developed on ‘X’ atom is: ___

Oxygen exhibits positive oxidation state in

The correct order of increasing thermal stability of K2CO3,MgCO3,CaCO3 and BeCO3 is:

The ratio of rates of diffusion of SO2,O2 and CH4 is .....

ΔH&lt;ΔE for the reaction:

Ionization potential is lowest for

Wat r regulatory genes ?

An aqueous solution of salt of sodium (NaX) on boiling with MgCI2 gives white precipitate, hence anion X is:

Suppose, in your lab, you have run out of dilute Sulphuric acid. You require dilute H2SO4 for an important synthesis but only have concentrated Sulphuric acid, water and a glass beaker. How will you synthesize dilute H2SO4 ?

Why radius of alpha particle is more than radius of He+ ?

Calculate the number of oxygen molecules required to combine with 7g of N2 to form N2O3 when 80% of N2 is converted to N2O3.

For a first order reaction, t0.75 is 138.6 seconds. Its specific rate constant (in s−1) is:

The freezing point of an aqueous solution of NaHSO4 is −0.372 oC. The dissociation constant for the reaction HSO−4→H++SO−24 is 0.4. Find the concentration of NaHSO4 in mol/kg. [Kf for H2O=1.86 Kkgmol–1] (Assume dilute solution and take molality = molarity)

What will be the electrode potential for the given half cell reaction at pH= 5?(R=8.314 J mol-1K-1; temp.=298 K; oxygen under std. atm. The pressure of 1 bar.)

Which of the following molecule has bond order 1/2?

What happens when K2Cr2O7 is treated with KI?

The decomposition of hydrocarbon follows the equation k=(4.5×1011s−1)e−28000 K/T. Calculate the activation energy Ea

A sample of 1.0 mol of a monoatomic ideal gas is taken through a cyclic process of expansion and compression as shown in figure. What will be the value of ΔH for the cycle as a whole?

Which of the following will not be oxidized by ozone?

ClCH2CHCl2alc. KOH−−−−−→A A is:

Setting of plaster of paris is

Among the second period elements the actual ionization enthalpies are in the order Li &lt; B &lt; Be &lt; C &lt; O &lt; N &lt; F &lt; Ne. Explain why (i) Be has higher ∆iH than B (ii)O has lower ΔiH than N and F?

Low level of noradrenaline is the cause of depression. What types of drugs are needed to cure this problem? Name two drugs.

ΔH<ΔE for the reaction:

Among the second period elements the actual ionization enthalpies are in the order Li < B < Be < C < O < N < F < Ne. Explain why (i) Be has higher ∆iH than B (ii)O has lower ΔiH than N and F?