46295 + Interview Questions in Chemistry

1.	how many types of nuclear fission are there.What are there produc
Answer» how many types of nuclear fission are there.What are there produc

Discussion

2.	9. Density of 2.03 molar aqueous solution of acetic acid is 1.017 g / ml . Molecular mass of acetic acid is 60. Calculate the molality of solution?
Answer» 9. Density of 2.03 molar aqueous solution of acetic acid is 1.017 g / ml . Molecular mass of acetic acid is 60. Calculate the molality of solution?

Discussion

3.	What accelerating voltage nearly in kilovolt would be required for the electrons of an electron microscope .if the microscope is to have the same resolving power as could be obtained using 100 kev gamma rays?
Answer» What accelerating voltage nearly in kilovolt would be required for the electrons of an electron microscope .if the microscope is to have the same resolving power as could be obtained using 100 kev gamma rays?

Discussion

4.	When a solution of benzoic acid was titrated with NaOH.the pH of the solution when half of the acid is neutralised was 4.2 .Dissociation constant of the acid is?
Answer» When a solution of benzoic acid was titrated with NaOH.the pH of the solution when half of the acid is neutralised was 4.2 .Dissociation constant of the acid is?

Discussion

5.	At 400 K, the root mean square (rms) speed of a gas X (molecular mass = 40) is equal to the most probable speed of gas Y at 60 K. The molecular mass (in amu) of the gas Y is:
Answer» At $400 K$ , the root mean square (rms) speed of a gas $X$ (molecular mass = 40) is equal to the most probable speed of gas $Y$ at $60 K$ . The molecular mass (in amu) of the gas $Y$ is:

Discussion

6.	The star of India sapphire weight 563carats. The carat equals to 200mg. What is weight of gemstone in grams?
Answer» The star of India sapphire weight 563carats. The carat equals to 200mg. What is weight of gemstone in grams?

Discussion

7.	which is true for the combustion of sucrose at 25^° C ? 1)△ H=△ E 2)△ H△ E 4)none
Answer» which is true for the combustion of sucrose at 25^° C ? 1)△ H=△ E 2)△ H△ E 4)none

Discussion

8.	What is the total no. of electrons present in 1.6g of methane ?
Answer» What is the total no. of electrons present in 1.6g of methane ?

Discussion

9.	21.explain the mechanism of wittig reaction.
Answer» 21.explain the mechanism of wittig reaction.

Discussion

10.	Is -NH3 a strong field ligand or not and if it not a strong field ligand with " Copper " then with which elements do it belong as a strong ligand
Answer» Is -NH3 a strong field ligand or not and if it not a strong field ligand with " Copper " then with which elements do it belong as a strong ligand

Discussion

11.	Which of the following graphs represents exothermic reaction ? (a) Only I (b) Only II (c) Only III (d) I and II
Answer» Which of the following graphs represents exothermic reaction ? (a) Only I (b) Only II (c) Only III (d) I and II

11.

Which of the following graphs represents exothermic reaction ? (a) Only I (b) Only II (c) Only III (d) I and II

Answer»

Which of the following graphs represents exothermic reaction ?

(a) Only I
(b) Only II
(c) Only III
(d) I and II

Discussion

12.	30. Number of isomer formed by [Co(en2)BrCl]Br with structure ?
Answer» 30. Number of isomer formed by [Co(en2)BrCl]Br with structure ?

Discussion

13.	Arrange the following compounds in a decreasing order of the rates of electrophilic addition reaction.
Answer» Arrange the following compounds in a decreasing order of the rates of electrophilic addition reaction.

Discussion

14.	14. Why benzene has six carbon and six hydrogen? Explain it
Answer» 14. Why benzene has six carbon and six hydrogen? Explain it

Discussion

15.	The ratio of rates of effusion of SO2 to SO3 is:
Answer» The ratio of rates of effusion of $S O_{2}$ to $S O_{3}$ is:

Discussion

16.	Calculate the minimum frequency required to remove a first shell electron completely from a hydrogen atom. Given: R =1.097×10−2 nm−1
Answer» Calculate the minimum frequency required to remove a first shell electron completely from a hydrogen atom. Given: R $= 1.097 \times 10^{- 2}$ nm $^{- 1}$

Discussion

17.	Metal M3 reacted with a salt of metal M4. The products were M4 and salt of M3. However, metal M4 had no reaction with a salt of M3. What can you say about the reactivities of M3 and M4?
Answer» Metal M₃ reacted with a salt of metal M₄. The products were M₄ and salt of M₃. However, metal M₄ had no reaction with a salt of M₃. What can you say about the reactivities of M₃ and M₄?

Discussion

18.	Which of the following is most soluble?
Answer» Which of the following is most soluble?

Discussion

19.	Given that for a reaction of order , the integrated form of the rate equation is k=1t(n−1)∣∣∣1Cn−1−1Cn−10∣∣∣ where C0 and C are the values of the reactant concentration at the start and after time t . What is the relationship between t3/4 and t1/2 where t3/4 is the time required for to become 14C0?
Answer» Given that for a reaction of order , the integrated form of the rate equation is $k = \frac{1}{t (n - 1)} ∣ ∣ ∣ \begin{matrix} \frac{1}{C^{n - 1} - \frac{1}{C_{0}^{n - 1}}} \end{matrix} ∣ ∣ ∣$ where $C_{0}$ and C are the values of the reactant concentration at the start and after time t . What is the relationship between $t_{3 / 4}$ and $t_{1 / 2}$ where $t_{3 / 4}$ is the time required for to become $\frac{1}{4} C_{0}$ ?

Discussion

20.	For the reaction 2A→B+3C; if −d[A]dt=k1[A]2 ; d[B]dt=k2 [A]2;d[C]dt=k3[A]2 the correct reaction between k1, k2 and k3 is :
Answer» For the reaction $2 A \to B + 3 C; i f - \frac{d [A]}{d t} = k_{1} [A]^{2}; \frac{d [B]}{d t} = k_{2} [A]^{2}; \frac{d [C]}{d t} = k_{3} [A]^{2}$ the correct reaction between $k_{1}, k_{2} a n d k_{3}$ is :

Discussion

21.	What will be the oxidation number of Chromium (Cr) in CrO5?
Answer» What will be the oxidation number of Chromium $(C r)$ in $C r O_{5}$ ?

Discussion

22.	What is meaning of ordered pair
Answer» What is meaning of ordered pair

Discussion

23.	For a chemical reaction of the typeA B , K=2BC , K=0.01Equilirium constant for reaction 2A2C is Options:a.25b.50c.2500 d.4 × 10–4
Answer» For a chemical reaction of the type A<==> B , K=2 B<==>C , K=0.01 Equilirium constant for reaction 2A<==>2C is Options: a.25 b.50 c.2500 d.4 × 10–4

Discussion

24.	The electrophile in nitration of benzene reaction is:
Answer» The electrophile in nitration of benzene reaction is:

Discussion

25.	10 ml of H_{2 }contain 2000 molecules under certain temperature and pressure. Calculate the number of molecules of oxygen whose volume is 150 ml at the same temperature and pressure .
Answer» 10 ml of H_{2 }contain 2000 molecules under certain temperature and pressure. Calculate the number of molecules of oxygen whose volume is 150 ml at the same temperature and pressure .

Discussion

26.	10 L of a monoatomic ideal gas at O ∘C and 5 atm is suddenly released to 1 atm pressure and the gas is expanded adiabatically against the constant pressure. Find the final volume (in L) of the gas:
Answer» $10 L$ of a monoatomic ideal gas at $O^{\circ} C$ and $5 atm$ is suddenly released to $1 atm$ pressure and the gas is expanded adiabatically against the constant pressure. Find the final volume $(in L)$ of the gas:

Discussion

27.	Are the isothermal and adiabatic processes same
Answer» Are the isothermal and adiabatic processes same

Discussion

28.	Q104) Among FeS04 7H20 (A), CuSO.5H2O (B)ZnSO4 7H2O (C), MnSO44H2(D), isomorphous\lbrack DPMT 2003\rbrack salts area) A and C b) A and D c) C and B
Answer» Q104) Among FeS04 7H20 (A), CuSO.5H2O (B)ZnSO4 7H2O (C), MnSO44H2(D), isomorphous\lbrack DPMT 2003\rbrack salts area) A and C b) A and D c) C and B

Discussion

29.	Niobium crystallizes in HCP structure. If all the tetrahedral voids present on the edge of the unit cell (shown in the figure) are occupied by boron atoms and carbon atoms fill half of the octahedral voids present, then the formula of the resulting interstitial compound is:
Answer» Niobium crystallizes in HCP structure. If all the tetrahedral voids present on the edge of the unit cell (shown in the figure) are occupied by boron atoms and carbon atoms fill half of the octahedral voids present, then the formula of the resulting interstitial compound is:

Discussion

30.	IN R-CH2-X substituion or elimination reaction takes place? Which mechanism takes place A.SN1 B.SN2 C.E1 D.E2
Answer» IN R-CH2-X substituion or elimination reaction takes place? Which mechanism takes place A.SN1 B.SN2 C.E1 D.E2

Discussion

31.	magnetic moment (in B.M.) of complex \lbrack Co(H2O)6\rbrack3+ is?
Answer» magnetic moment (in B.M.) of complex \lbrack Co(H2O)6\rbrack3+ is?

Discussion

32.	No. of resonating structures in S03. Draw the
Answer» No. of resonating structures in S03. Draw the

Discussion

33.	All the atoms in the given pictures are _____.
Answer» All the atoms in the given pictures are _____.

Discussion

34.	B2H6+NH3excess ofNH3−−−−−−−−−→low temperatureA Compound A is ionic in nature which on strong heating gives a compound which is aromatic in nature. Sum of number of lone pair(s) present in cationic and anionic part of A is
Answer» $B_{2} H_{6} + N H_{3} excess of N H_{3} - -------- \to low temperature A$ Compound A is ionic in nature which on strong heating gives a compound which is aromatic in nature. Sum of number of lone pair(s) present in cationic and anionic part of A is

Discussion

35.	Increasing order of C−O bond length in CO, CO2 and CO2−3 is:
Answer» Increasing order of $C - O$ bond length in $C O$ , $C O_{2}$ and $C O_{3}^{2 -}$ is:

Discussion

36.	How does water pollution affect biodiversity?
Answer» How does water pollution affect biodiversity?

Discussion

37.	For which element of first transition series the oxidation potential value(M→M2++2e−) is lowest
Answer» For which element of first transition series the oxidation potential value $(M \to M^{2 +} + 2 e^{-})$ is lowest

Discussion

38.	The equilibrium P4 (s)+6Cl2(g)⇋ 4 PCl3 (g) Is attained by mixing equal moles of P4 and Cl2 inana evacuated vessel. Then at equilibrium
Answer» The equilibrium $P_{4} (s) + 6 C l_{2} (g) ⇋ 4 P C l_{3} (g)$ Is attained by mixing equal moles of $P_{4} a n d C l_{2}$ inana evacuated vessel. Then at equilibrium

Discussion

39.	The correct order for electron density at ortho-para positions for the following compounds is :
Answer» The correct order for electron density at ortho-para positions for the following compounds is :

Discussion

40.	What's the difference between position isomerism and stereo isomerism?
Answer» What's the difference between position isomerism and stereo isomerism?

Discussion

41.	Which of the following graphs between wave function and radius of nucleus correspond to one node?
Answer» Which of the following graphs between wave function and radius of nucleus correspond to one node?

Discussion

42.	The enthalpy of combustion of methane, graphite and dihydrogen at 298 K are, –890.3 kJ mol–1 –393.5 kJ mol–1, and –285.8 kJ mol–1 respectively. Enthalpy of formation of CH4(g) will be(i) –74.8 kJ mol–1 (ii) –52.27 kJ mol–1(iii) +74.8 kJ mol–1 (iv) +52.26 kJ mol–1.
Answer» The enthalpy of combustion of methane, graphite and dihydrogen at 298 K are, –890.3 kJ mol^–1 –393.5 kJ mol^–1, and –285.8 kJ mol^–1 respectively. Enthalpy of formation of CH₄₍_g₎ will be (i) –74.8 kJ mol^–1 (ii) –52.27 kJ mol^–1 (iii) +74.8 kJ mol^–1 (iv) +52.26 kJ mol^–1.

42.

The enthalpy of combustion of methane, graphite and dihydrogen at 298 K are, –890.3 kJ mol–1 –393.5 kJ mol–1, and –285.8 kJ mol–1 respectively. Enthalpy of formation of CH4(g) will be(i) –74.8 kJ mol–1 (ii) –52.27 kJ mol–1(iii) +74.8 kJ mol–1 (iv) +52.26 kJ mol–1.

Answer»

The enthalpy of combustion of methane, graphite and dihydrogen at 298 K are, –890.3 kJ mol^–1 –393.5 kJ mol^–1, and –285.8 kJ mol^–1 respectively. Enthalpy of formation of CH₄₍_g₎ will be

(i) –74.8 kJ mol^–1 (ii) –52.27 kJ mol^–1

(iii) +74.8 kJ mol^–1 (iv) +52.26 kJ mol^–1.

Discussion

43.	The correct order of relative stability of half filled and completely filled sub-shell is:
Answer» The correct order of relative stability of half filled and completely filled sub-shell is:

Discussion

44.	How to identify which aldehyde is more reactive towards cannizaro reaction
Answer» How to identify which aldehyde is more reactive towards cannizaro reaction

Discussion

45.	28. Is Na+has positive or negative electron gain enthalpy
Answer» 28. Is Na+has positive or negative electron gain enthalpy

Discussion

46.	the iupac name of the compound is CH3CH=CHCH=CHC≡ CCH3 ?
Answer» the iupac name of the compound is CH3CH=CHCH=CHC≡ CCH3 ?

Discussion

47.	Among the following, the no. of aromatic compound(s) is/are:
Answer» Among the following, the no. of aromatic compound(s) is/are:

Discussion

48.	3. How both gerade and ungerade are take place in mot of 1s2. Because in 1s2 there is only two atoms or orbital
Answer» 3. How both gerade and ungerade are take place in mot of 1s2. Because in 1s2 there is only two atoms or orbital

Discussion

49.	in a given system of unit ,1 unit of mass = 2Kg , 1 unit = 5m, i unit of time = 5s, then in this system 1 N represent:
Answer» in a given system of unit ,1 unit of mass = 2Kg , 1 unit = 5m, i unit of time = 5s, then in this system 1 N represent:

Discussion

50.	What is exchange energy? How can a single electron can exchange energy with other degenerate orbitals at same time? (cause we take the possibility of exchanges but how can a single electron do more than one exchange at a time so it should have only one exchange energy)
Answer» What is exchange energy? How can a single electron can exchange energy with other degenerate orbitals at same time? (cause we take the possibility of exchanges but how can a single electron do more than one exchange at a time so it should have only one exchange energy)

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

how many types of nuclear fission are there.What are there produc

9. Density of 2.03 molar aqueous solution of acetic acid is 1.017 g / ml . Molecular mass of acetic acid is 60. Calculate the molality of solution?

What accelerating voltage nearly in kilovolt would be required for the electrons of an electron microscope .if the microscope is to have the same resolving power as could be obtained using 100 kev gamma rays?

When a solution of benzoic acid was titrated with NaOH.the pH of the solution when half of the acid is neutralised was 4.2 .Dissociation constant of the acid is?

At 400 K, the root mean square (rms) speed of a gas X (molecular mass = 40) is equal to the most probable speed of gas Y at 60 K. The molecular mass (in amu) of the gas Y is:

The star of India sapphire weight 563carats. The carat equals to 200mg. What is weight of gemstone in grams?

which is true for the combustion of sucrose at 25^° C ? 1)△ H=△ E 2)△ H△ E 4)none

What is the total no. of electrons present in 1.6g of methane ?

21.explain the mechanism of wittig reaction.

Is -NH3 a strong field ligand or not and if it not a strong field ligand with " Copper " then with which elements do it belong as a strong ligand

Which of the following graphs represents exothermic reaction ? (a) Only I (b) Only II (c) Only III (d) I and II

30. Number of isomer formed by [Co(en2)BrCl]Br with structure ?

Arrange the following compounds in a decreasing order of the rates of electrophilic addition reaction.

14. Why benzene has six carbon and six hydrogen? Explain it

The ratio of rates of effusion of SO2 to SO3 is:

Calculate the minimum frequency required to remove a first shell electron completely from a hydrogen atom. Given: R =1.097×10−2 nm−1

Metal M3 reacted with a salt of metal M4. The products were M4 and salt of M3. However, metal M4 had no reaction with a salt of M3. What can you say about the reactivities of M3 and M4?

Which of the following is most soluble?

For the reaction 2A→B+3C; if −d[A]dt=k1[A]2 ; d[B]dt=k2 [A]2;d[C]dt=k3[A]2 the correct reaction between k1, k2 and k3 is :

What will be the oxidation number of Chromium (Cr) in CrO5?

What is meaning of ordered pair

For a chemical reaction of the typeA B , K=2BC , K=0.01Equilirium constant for reaction 2A2C is Options:a.25b.50c.2500 d.4 × 10–4

The electrophile in nitration of benzene reaction is:

10 ml of H_{2 }contain 2000 molecules under certain temperature and pressure. Calculate the number of molecules of oxygen whose volume is 150 ml at the same temperature and pressure .

10 L of a monoatomic ideal gas at O ∘C and 5 atm is suddenly released to 1 atm pressure and the gas is expanded adiabatically against the constant pressure. Find the final volume (in L) of the gas:

Are the isothermal and adiabatic processes same

Q104) Among FeS04 7H20 (A), CuSO.5H2O (B)ZnSO4 7H2O (C), MnSO44H2(D), isomorphous\lbrack DPMT 2003\rbrack salts area) A and C b) A and D c) C and B

Niobium crystallizes in HCP structure. If all the tetrahedral voids present on the edge of the unit cell (shown in the figure) are occupied by boron atoms and carbon atoms fill half of the octahedral voids present, then the formula of the resulting interstitial compound is:

IN R-CH2-X substituion or elimination reaction takes place? Which mechanism takes place A.SN1 B.SN2 C.E1 D.E2

magnetic moment (in B.M.) of complex \lbrack Co(H2O)6\rbrack3+ is?

No. of resonating structures in S03. Draw the

All the atoms in the given pictures are _____.

B2H6+NH3excess ofNH3−−−−−−−−−→low temperatureA Compound A is ionic in nature which on strong heating gives a compound which is aromatic in nature. Sum of number of lone pair(s) present in cationic and anionic part of A is

Increasing order of C−O bond length in CO, CO2 and CO2−3 is:

How does water pollution affect biodiversity?

For which element of first transition series the oxidation potential value(M→M2++2e−) is lowest

The equilibrium P4 (s)+6Cl2(g)⇋ 4 PCl3 (g) Is attained by mixing equal moles of P4 and Cl2 inana evacuated vessel. Then at equilibrium

The correct order for electron density at ortho-para positions for the following compounds is :

What's the difference between position isomerism and stereo isomerism?

Which of the following graphs between wave function and radius of nucleus correspond to one node?

The enthalpy of combustion of methane, graphite and dihydrogen at 298 K are, –890.3 kJ mol–1 –393.5 kJ mol–1, and –285.8 kJ mol–1 respectively. Enthalpy of formation of CH4(g) will be(i) –74.8 kJ mol–1 (ii) –52.27 kJ mol–1(iii) +74.8 kJ mol–1 (iv) +52.26 kJ mol–1.

The correct order of relative stability of half filled and completely filled sub-shell is:

How to identify which aldehyde is more reactive towards cannizaro reaction

28. Is Na+has positive or negative electron gain enthalpy

the iupac name of the compound is CH3CH=CHCH=CHC≡ CCH3 ?

Among the following, the no. of aromatic compound(s) is/are:

3. How both gerade and ungerade are take place in mot of 1s2. Because in 1s2 there is only two atoms or orbital

in a given system of unit ,1 unit of mass = 2Kg , 1 unit = 5m, i unit of time = 5s, then in this system 1 N represent:

What is exchange energy? How can a single electron can exchange energy with other degenerate orbitals at same time? (cause we take the possibility of exchanges but how can a single electron do more than one exchange at a time so it should have only one exchange energy)