46295 + Interview Questions in Chemistry

1.	Read the following statements carefully (i) An electrostatic precipitator removes particulate matter by imposing negative charge on them. (ii) Catalytic converters convert unburnt hydrocarbons into CO2 & water. (iii) Peroxyacyl nitrate (PAN) is a secondary pollutant. (iv) DDT is a non – biodegradable pollutant. Which of the above statements are incorrect?
Answer» Read the following statements carefully (i) An electrostatic precipitator removes particulate matter by imposing negative charge on them. (ii) Catalytic converters convert unburnt hydrocarbons into $C O_{2}$ & water. (iii) Peroxyacyl nitrate (PAN) is a secondary pollutant. (iv) DDT is a non – biodegradable pollutant. Which of the above statements are incorrect?

1.

Read the following statements carefully (i) An electrostatic precipitator removes particulate matter by imposing negative charge on them. (ii) Catalytic converters convert unburnt hydrocarbons into CO2 & water. (iii) Peroxyacyl nitrate (PAN) is a secondary pollutant. (iv) DDT is a non – biodegradable pollutant. Which of the above statements are incorrect?

Answer»

Read the following statements carefully

(i) An electrostatic precipitator removes particulate matter by imposing negative charge on them.

(ii) Catalytic converters convert unburnt hydrocarbons into $C O_{2}$ & water.

(iii) Peroxyacyl nitrate (PAN) is a secondary pollutant.

(iv) DDT is a non – biodegradable pollutant.

Which of the above statements are incorrect?

Discussion

2.	Considering the basic strength of amines in aqueous solutions, which one has the smallest pKb value?
Answer» Considering the basic strength of amines in aqueous solutions, which one has the smallest $p K_{b}$ value?

Discussion

3.	The resistance of 0.01 N NaCl solution at 25∘C is 200 Ω. Cell constant of conductivity cell is 1 cm−1. The equivalent conductance is :
Answer» The resistance of $0.01 N N a C l$ solution at $25^{\circ} C$ is $200 Ω$ . Cell constant of conductivity cell is $1 c m^{- 1}$ . The equivalent conductance is :

Discussion

4.	Which of the following is ferroelectric compound[AFMC 1997]
Answer» Which of the following is ferroelectric compound [AFMC 1997]

4.

Which of the following is ferroelectric compound[AFMC 1997]

Answer»

Which of the following is ferroelectric compound

[AFMC 1997]

Discussion

5.	If 40 ml of 1.6 M HCl reacts with 60 ml of 2 M NaOH, the mass of NaCl produced is :
Answer» If 40 ml of 1.6 M HCl reacts with 60 ml of 2 M NaOH, the mass of NaCl produced is :

Discussion

6.	The number of neutrons emitted when 23592U undergoes controlled nuclear fission to 14254Xe and 9038Sr is ___
Answer» The number of neutrons emitted when $_{92}^{235} U$ undergoes controlled nuclear fission to $_{54}^{142} X e$ and $_{38}^{90} S r$ is ___

Discussion

7.	When a point light source, of power W emitting light of wavelength λ is kept at a distance 'a' from a photosensitive surface of work function ϕ and area S, we will have
Answer» When a point light source, of power W emitting light of wavelength λ is kept at a distance 'a' from a photosensitive surface of work function ϕ and area S, we will have

Discussion

8.	The decomposition of hydrogen peroxide in an aqueous solution is a reaction of first order. It can be followed by titrating 10 mL portions of reaction mixture at various times from the beginning of reaction against a standard solution of KMnO4. Volume of KMnO4 solution used in each case is proportional to the remaining concentration of H2O2. From the following data, calculate the rate constant of the reaction. Time (in seconds)06001200KMnO4 sol. used (in mL)22.813.88.20
Answer» The decomposition of hydrogen peroxide in an aqueous solution is a reaction of first order. It can be followed by titrating 10 mL portions of reaction mixture at various times from the beginning of reaction against a standard solution of $K M n O_{4}$ . Volume of $K M n O_{4}$ solution used in each case is proportional to the remaining concentration of $H_{2} O_{2}$ . From the following data, calculate the rate constant of the reaction. $\begin{matrix} Time (in seconds) & 0 & 600 & 1200 K M n O_{4} sol. used (in mL) & 22.8 & 13.8 & 8.20 \end{matrix}$

Discussion

9.	At 25∘ C, ksp of AgCN is 4×10−16 while Ka of HCN is 4×10−10. The value of molar solubility of AgCN in 0.01 M HNO3 is 10−y. The value of y is
Answer» At $25^{\circ} C$ , $k_{s p}$ of $A g C N$ is $4 \times 10^{- 16}$ while $K_{a}$ of $H C N$ is $4 \times 10^{- 10}$ . The value of molar solubility of $A g C N$ in $0.01 M H N O_{3}$ is $10^{- y}$ . The value of $y$ is

Discussion

10.	Ratio of angular momentum for an electron in 3rd orbit of Li++ and 5th orbit of He+ is
Answer» Ratio of angular momentum for an electron in $3^{r d}$ orbit of $L i^{+ +}$ and $5^{t h}$ orbit of $H e^{+}$ is

Discussion

11.	A certain radioactive element disintegrates for an interval of time equal to its mean life. The fraction that has disintegrated is
Answer» A certain radioactive element disintegrates for an interval of time equal to its mean life. The fraction that has disintegrated is

Discussion

12.	The equilibrium constant for, 2H2S(g)⇌2H2(g)+S2(g) is 0.0118 at 1300 K while the heat of dissociation is 597.4 kJ. The standard equilibrium constant of the reaction at 1200 K is:
Answer» The equilibrium constant for, $2 H_{2} S (g) ⇌ 2 H_{2} (g) + S_{2} (g)$ is 0.0118 at 1300 K while the heat of dissociation is 597.4 kJ. The standard equilibrium constant of the reaction at 1200 K is:

Discussion

13.	The radioactive nuclide decays according to 116C→115B+e++ν.The disintegration energy of this process is Q(in MeV). Given that atomic masses mC=11.011433u,me=0.0005486u,mB=11.009305u,1 amu=931 MeV. Then the value of 100Q19 is
Answer» The radioactive nuclide decays according to $_{6}^{11} C \to_{5}^{11} B + e^{+} + ν$ .The disintegration energy of this process is $Q$ (in $M e V$ ). Given that atomic masses $m_{C} = 11.011433 u, m_{e} = 0.0005486 u, m_{B} = 11.009305 u, 1 a m u = 931 M e V$ . Then the value of $\frac{100 Q}{19}$ is

Discussion

14.	In the given reaction: The number of alkenes formed would be:
Answer» In the given reaction: The number of alkenes formed would be:

Discussion

15.	Difference between atom and molecule.
Answer» Difference between atom and molecule.

Discussion

16.	In the alkane H3C−CH2−C(CH3)2−CH2−CH(CH3)2, identify 1∘,2∘,3∘ carbon atoms and give the number of H atoms bonded to each one of these.
Answer» In the alkane $H_{3} C - C H_{2} - C (C H_{3})_{2} - C H_{2} - C H (C H_{3})_{2}$ , identify $1^{\circ}, 2^{\circ}, 3^{\circ}$ carbon atoms and give the number of H atoms bonded to each one of these.

Discussion

17.	Write the favourable factors for the formation of ionic bond.
Answer» Write the favourable factors for the formation of ionic bond.

Discussion

18.	Which of the following has highest first ionization enthalpy?
Answer» Which of the following has highest first ionization enthalpy?

Discussion

19.	Benzaldehyde condenses with N, N-dimethylaniline in the presence of anhydrous ZnCl2 to give
Answer» Benzaldehyde condenses with N, N-dimethylaniline in the presence of anhydrous $Z n C l_{2}$ to give

Discussion

20.	Which nomenclature is correct?--- a) 1,6-dimethylcyclohex-1-ene b) 2,3-dimethylcyclohex-1-ene
Answer» Which nomenclature is correct?--- a) 1,6-dimethylcyclohex-1-ene b) 2,3-dimethylcyclohex-1-ene

20.

Which nomenclature is correct?--- a) 1,6-dimethylcyclohex-1-ene b) 2,3-dimethylcyclohex-1-ene

Answer»

Which nomenclature is correct?---

a) 1,6-dimethylcyclohex-1-ene

b) 2,3-dimethylcyclohex-1-ene

Discussion

21.	How does H2+ O2 -> H2O
Answer» How does H2+ O2 -> H2O

Discussion

22.	CaCl2 + C2H5OH = CaCl2.xC2H5OH . Then 'x' is
Answer» CaCl2 + C2H5OH = CaCl2.xC2H5OH . Then 'x' is

Discussion

23.	Calculate the volume occupied by 16 gram O2 at 300 K and 8.31 Mpa if PcVRTc=38 and PrVrTr=2.21 ⟮:R=8.314 MpaK−mol⟯
Answer» Calculate the volume occupied by 16 gram $O_{2}$ at 300 K and 8.31 Mpa if $\frac{P_{c} V}{R T_{c}} = \frac{3}{8} a n d \frac{P_{r} V_{r}}{T_{r}} = 2.21 ⟮ : R = 8.314 \frac{M p a}{K - m o l} ⟯$

Discussion

24.	In the compound 1CH2 = 2C−H\|3C\|H−4H\|C\|H−5C ≡ 6CH, the hybridization of C3 is:
Answer» In the compound $^{1} C H_{2}$ = $^{2} C - H \|^{3} C \| H -^{4} H \| C \| H -^{5} C$ ≡ $^{6} C H$ , the hybridization of $C_{3}$ is:

Discussion

25.	The ratio of energy of the electron in ground state of hydrogen to the electron in first excited state of Be+3 is :
Answer» The ratio of energy of the electron in ground state of hydrogen to the electron in first excited state of Be⁺³ is :

Discussion

26.	In bujus video . It is said that ch3cooNa salt completely dissociate.. My doubt is, is all salt completely dissociate(strong salt) ?. If not, which all are weak ie. Very lowly dissociate?
Answer» In bujus video . It is said that ch3cooNa salt completely dissociate.. My doubt is, is all salt completely dissociate(strong salt) ?. If not, which all are weak ie. Very lowly dissociate?

Discussion

27.	What will be the normality of a solution obtained by mixing 0.5 N Ca(OH)2 and 0.5 N Mg(OH)2 solution in the ratio 1:5 by volume?
Answer» What will be the normality of a solution obtained by mixing $0.5 N C a (O H)_{2}$ and $0.5 N M g (O H)_{2}$ solution in the ratio $1 : 5$ by volume?

Discussion

28.	The drain cleaner, Drainex contains small bits of aluminum which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20∘C and one bar will be released when 0.15 g aluminum is allowed to react?
Answer» The drain cleaner, Drainex contains small bits of aluminum which react with caustic soda to produce dihydrogen. What volume of dihydrogen at $20^{\circ} C$ and one bar will be released when $0.15 g$ aluminum is allowed to react?

Discussion

29.	Explain why Ccl4 cannot be hydrolysed? Also explain what is hyrodysis.!?
Answer» Explain why Ccl₄ cannot be hydrolysed? Also explain what is hyrodysis.!?

Discussion

30.	Law of conservation of mass was given by:
Answer» Law of conservation of mass was given by:

Discussion

31.	Experimentally it was found that a metal oxide has a formula of M0.98 . Metal M is present as M^+2 and M^+3 in its oxide. Fraction of the metal which exists as M^+3 would be ? Options ----- (A) 4.08 percentage (B) 6.05 percentage (C) 5.08 percentage (D) 7.01 percentage
Answer» Experimentally it was found that a metal oxide has a formula of M0.98 . Metal M is present as M^+2 and M^+3 in its oxide. Fraction of the metal which exists as M^+3 would be ? Options ----- (A) 4.08 percentage (B) 6.05 percentage (C) 5.08 percentage (D) 7.01 percentage

31.

Experimentally it was found that a metal oxide has a formula of M0.98 . Metal M is present as M^+2 and M^+3 in its oxide. Fraction of the metal which exists as M^+3 would be ? Options ----- (A) 4.08 percentage (B) 6.05 percentage (C) 5.08 percentage (D) 7.01 percentage

Answer»

Experimentally it was found that a metal oxide has a formula of M0.98 . Metal M is present as M^+2 and M^+3 in its oxide. Fraction of the metal which exists as M^+3 would be ?

Options -----

(A) 4.08 percentage

(B) 6.05 percentage

(C) 5.08 percentage

(D) 7.01 percentage

Discussion

32.	In van der Waals' equation of state for a non-ideal gas, the term that accounts for intermolecular forces is:
Answer» In van der Waals' equation of state for a non-ideal gas, the term that accounts for intermolecular forces is:

Discussion

33.	Let a fully charged lead_storage battery contains 1.5L of 5M H2SO4 . What will be the concentration of H2SO4 in the battery after 2.5 A current is drawn from the battery for 6 hours ? Opts- A. 0.1865M B. 4.626M C . 0.373M D. 9.627M
Answer» Let a fully charged lead_storage battery contains 1.5L of 5M H₂SO₄ . What will be the concentration of H₂SO₄ in the battery after 2.5 A current is drawn from the battery for 6 hours ? Opts- A. 0.1865M B. 4.626M C . 0.373M D. 9.627M

33.

Let a fully charged lead_storage battery contains 1.5L of 5M H2SO4 . What will be the concentration of H2SO4 in the battery after 2.5 A current is drawn from the battery for 6 hours ? Opts- A. 0.1865M B. 4.626M C . 0.373M D. 9.627M

Answer»

Let a fully charged lead_storage battery contains 1.5L of 5M

H₂SO₄ . What will be the concentration of H₂SO₄ in the battery after 2.5 A current is drawn from the battery for 6 hours ?

Opts-

A. 0.1865M

B. 4.626M

C . 0.373M

D. 9.627M

Discussion

34.	Write the structures of the following: (i) (HPO3)3 (ii) XeF4
Answer» Write the structures of the following: (i) $(H P O_{3})_{3}$ (ii) $X e F_{4}$

Discussion

35.	The concentration of cation vacancies when NaCl doped with 10^-3 mole% of SrCl 2
Answer» The concentration of cation vacancies when NaCl doped with 10^-3 mole% of SrCl 2

Discussion

36.	Which of the following will show least dipole character
Answer» Which of the following will show least dipole character

36.

Which of the following will show least dipole character

Answer»

Which of the following will show least dipole character

Discussion

37.	H2C=CH2+H2Ni−→H3C−CH3+Xkj/mole The relation between X and Y is
Answer» $H_{2} C = C H_{2} + H_{2} N i - \to H_{3} C - C H_{3} + X k j / m o l e$ The relation between X and Y is

37.

H2C=CH2+H2Ni−→H3C−CH3+Xkj/mole The relation between X and Y is

Answer»

$H_{2} C = C H_{2} + H_{2} N i - \to H_{3} C - C H_{3} + X k j / m o l e$

The relation between X and Y is

Discussion

38.	In compounds of higher oxidation states in transition metals the bonds formed are mostly:
Answer» In compounds of higher oxidation states in transition metals the bonds formed are mostly:

Discussion

39.	Suppose the chemists had chosen 1020 as the number of particles in a mole. What would be the molar mass of oxygen gas?
Answer» Suppose the chemists had chosen $10^{20}$ as the number of particles in a mole. What would be the molar mass of oxygen gas?

Discussion

40.	Which of the following acts as a better metal?
Answer» Which of the following acts as a better metal?

Discussion

41.	Which among the following is likely to show geometrical isomerism?
Answer» Which among the following is likely to show geometrical isomerism?

Discussion

42.	Compounds [A] and [B] are respectively
Answer» Compounds [A] and [B] are respectively

Discussion

43.	Which one of the following is an acyl group?
Answer» Which one of the following is an acyl group?

Discussion

44.	Strongest acid is
Answer» Strongest acid is

44.

Strongest acid is

Answer»

Strongest acid is

Discussion

45.	What is the basic difference in approach between the Mendeleev’s Periodic Law and the Modern Periodic Law?
Answer» What is the basic difference in approach between the Mendeleev’s Periodic Law and the Modern Periodic Law?

Discussion

46.	For the two gaseous reactions (i) and (ii), at 25∘C (i) NO(g)+12O2(g)⇌NO2(g) (ii) 2NO2(g)⇌2NO(g)+O2(g), The equilibrium constants are K1 and K2 respectively are related as:
Answer» For the two gaseous reactions (i) and (ii), at $25^{\circ} C$ (i) $N O (g) + \frac{1}{2} O_{2} (g) ⇌ N O_{2} (g)$ (ii) $2 N O_{2} (g) ⇌ 2 N O (g) + O_{2} (g)$ , The equilibrium constants are $K_{1}$ and $K_{2}$ respectively are related as:

46.

For the two gaseous reactions (i) and (ii), at 25∘C (i) NO(g)+12O2(g)⇌NO2(g) (ii) 2NO2(g)⇌2NO(g)+O2(g), The equilibrium constants are K1 and K2 respectively are related as:

Answer»

For the two gaseous reactions (i) and (ii), at $25^{\circ} C$

(i) $N O (g) + \frac{1}{2} O_{2} (g) ⇌ N O_{2} (g)$

(ii) $2 N O_{2} (g) ⇌ 2 N O (g) + O_{2} (g)$ ,

The equilibrium constants are $K_{1}$ and $K_{2}$ respectively are related as:

Discussion

47.	Arrange the following in order of increasing reactivity towards Grignard reagent -
Answer» Arrange the following in order of increasing reactivity towards Grignard reagent -

Discussion

48.	Choose the given reaction(s) in which water act as an oxidising agent.
Answer» Choose the given reaction(s) in which water act as an oxidising agent.

Discussion

49.	Salol can be used in
Answer» Salol can be used in

Discussion

50.	Which of the following has the highest dipole moment?
Answer» Which of the following has the highest dipole moment?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Considering the basic strength of amines in aqueous solutions, which one has the smallest pKb value?

The resistance of 0.01 N NaCl solution at 25∘C is 200 Ω. Cell constant of conductivity cell is 1 cm−1. The equivalent conductance is :

Which of the following is ferroelectric compound[AFMC 1997]

If 40 ml of 1.6 M HCl reacts with 60 ml of 2 M NaOH, the mass of NaCl produced is :

The number of neutrons emitted when 23592U undergoes controlled nuclear fission to 14254Xe and 9038Sr is ___

When a point light source, of power W emitting light of wavelength λ is kept at a distance 'a' from a photosensitive surface of work function ϕ and area S, we will have

At 25∘ C, ksp of AgCN is 4×10−16 while Ka of HCN is 4×10−10. The value of molar solubility of AgCN in 0.01 M HNO3 is 10−y. The value of y is

Ratio of angular momentum for an electron in 3rd orbit of Li++ and 5th orbit of He+ is

A certain radioactive element disintegrates for an interval of time equal to its mean life. The fraction that has disintegrated is

The equilibrium constant for, 2H2S(g)⇌2H2(g)+S2(g) is 0.0118 at 1300 K while the heat of dissociation is 597.4 kJ. The standard equilibrium constant of the reaction at 1200 K is:

The radioactive nuclide decays according to 116C→115B+e++ν.The disintegration energy of this process is Q(in MeV). Given that atomic masses mC=11.011433u,me=0.0005486u,mB=11.009305u,1 amu=931 MeV. Then the value of 100Q19 is

In the given reaction: The number of alkenes formed would be:

Difference between atom and molecule.

In the alkane H3C−CH2−C(CH3)2−CH2−CH(CH3)2, identify 1∘,2∘,3∘ carbon atoms and give the number of H atoms bonded to each one of these.

Write the favourable factors for the formation of ionic bond.

Which of the following has highest first ionization enthalpy?

Benzaldehyde condenses with N, N-dimethylaniline in the presence of anhydrous ZnCl2 to give

Which nomenclature is correct?--- a) 1,6-dimethylcyclohex-1-ene b) 2,3-dimethylcyclohex-1-ene

How does H2+ O2 -&gt; H2O

CaCl2 + C2H5OH = CaCl2.xC2H5OH . Then 'x' is

Calculate the volume occupied by 16 gram O2 at 300 K and 8.31 Mpa if PcVRTc=38 and PrVrTr=2.21 ⟮:R=8.314 MpaK−mol⟯

In the compound 1CH2 = 2C−H|3C|H−4H|C|H−5C ≡ 6CH, the hybridization of C3 is:

The ratio of energy of the electron in ground state of hydrogen to the electron in first excited state of Be+3 is :

In bujus video . It is said that ch3cooNa salt completely dissociate.. My doubt is, is all salt completely dissociate(strong salt) ?. If not, which all are weak ie. Very lowly dissociate?

What will be the normality of a solution obtained by mixing 0.5 N Ca(OH)2 and 0.5 N Mg(OH)2 solution in the ratio 1:5 by volume?

The drain cleaner, Drainex contains small bits of aluminum which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20∘C and one bar will be released when 0.15 g aluminum is allowed to react?

Explain why Ccl4 cannot be hydrolysed? Also explain what is hyrodysis.!?

Law of conservation of mass was given by:

Experimentally it was found that a metal oxide has a formula of M0.98 . Metal M is present as M^+2 and M^+3 in its oxide. Fraction of the metal which exists as M^+3 would be ? Options ----- (A) 4.08 percentage (B) 6.05 percentage (C) 5.08 percentage (D) 7.01 percentage

In van der Waals' equation of state for a non-ideal gas, the term that accounts for intermolecular forces is:

Let a fully charged lead_storage battery contains 1.5L of 5M H2SO4 . What will be the concentration of H2SO4 in the battery after 2.5 A current is drawn from the battery for 6 hours ? Opts- A. 0.1865M B. 4.626M C . 0.373M D. 9.627M

Write the structures of the following: (i) (HPO3)3 (ii) XeF4

The concentration of cation vacancies when NaCl doped with 10^-3 mole% of SrCl 2

Which of the following will show least dipole character

H2C=CH2+H2Ni−→H3C−CH3+Xkj/mole The relation between X and Y is

In compounds of higher oxidation states in transition metals the bonds formed are mostly:

Suppose the chemists had chosen 1020 as the number of particles in a mole. What would be the molar mass of oxygen gas?

Which of the following acts as a better metal?

Which among the following is likely to show geometrical isomerism?

Compounds [A] and [B] are respectively

Which one of the following is an acyl group?

Strongest acid is

What is the basic difference in approach between the Mendeleev’s Periodic Law and the Modern Periodic Law?

For the two gaseous reactions (i) and (ii), at 25∘C (i) NO(g)+12O2(g)⇌NO2(g) (ii) 2NO2(g)⇌2NO(g)+O2(g), The equilibrium constants are K1 and K2 respectively are related as:

Arrange the following in order of increasing reactivity towards Grignard reagent -

Choose the given reaction(s) in which water act as an oxidising agent.

Salol can be used in

Which of the following has the highest dipole moment?

How does H2+ O2 -> H2O