46295 + Interview Questions in Chemistry

1.	On an industrial scale, H2O2 is prepared by oxidation of:
Answer» On an industrial scale, H₂O₂is prepared by oxidation of:

Discussion

2.	when chloro benzenr is reacted with KNH2in presence of liq ammonia product formed is a)3-chloro aniline b) aniline c)2-chloro aniline d)4-chloro aniline
Answer» when chloro benzenr is reacted with KNH2in presence of liq ammonia product formed is a)3-chloro aniline b) aniline c)2-chloro aniline d)4-chloro aniline

Discussion

3.	During the electrolysis of an electrolyte, the number of ions produced, is directly proportional to the [AFMC 2002]
Answer» During the electrolysis of an electrolyte, the number of ions produced, is directly proportional to the [AFMC 2002]

3.

During the electrolysis of an electrolyte, the number of ions produced, is directly proportional to the [AFMC 2002]

Answer»

During the electrolysis of an electrolyte, the number of ions produced, is directly proportional to the

[AFMC 2002]

Discussion

4.	Find the value of log 0.002
Answer» Find the value of log 0.002

Discussion

5.	50. The amount of H2O2 present in 1L of 1.5 N H2O2 solution is (1) 2.5 (2) 25.5 (3) 3.0 (4) 8.0
Answer» 50. The amount of H2O2 present in 1L of 1.5 N H2O2 solution is (1) 2.5 (2) 25.5 (3) 3.0 (4) 8.0

Discussion

6.	A reaction system in equilibrium according to reaction 2SO2(g)+O2(g)⇌2SO3(g) in one litre vessel at a given temperature was found to be 0.12 mol each SO2 and SO3 and 5 mole of O2.In another vessel of one litre contains 32 g of SO2 at tempreture.What mass in grams of O2 must be added to this vessel to order that at equilibrium 20% of SO2 in oxidized toSO2?
Answer» A reaction system in equilibrium according to reaction $2 S O_{2} (g) + O_{2} (g) ⇌ 2 S O_{3} (g)$ in one litre vessel at a given temperature was found to be $0.12 mol$ each $S O_{2}$ and $S O_{3}$ and $5$ mole of $O_{2}$ .In another vessel of one litre contains $32 g$ of $S O_{2}$ at tempreture.What mass in grams of $O_{2}$ must be added to this vessel to order that at equilibrium $20 %$ of $S O_{2}$ in oxidized to $S O_{2}$ ?

Discussion

7.	26. The EMF of the cell Mn\vert Mn+(0.02M)\vert\vert H+(1M)\vert H2(g)(1atm), Pt at 25℃ is 0.18 V. Then the valency of the metal is, if the Standard oxidation potential of the metal is 0.76 V.
Answer» 26. The EMF of the cell Mn\vert Mn+(0.02M)\vert\vert H+(1M)\vert H2(g)(1atm), Pt at 25℃ is 0.18 V. Then the valency of the metal is, if the Standard oxidation potential of the metal is 0.76 V.

Discussion

8.	IUPAC name of CH2=CH-CH2- and CH3-CH=CH- groups respectively.
Answer» IUPAC name of CH2=CH-CH2- and CH3-CH=CH- groups respectively.

Discussion

9.	A substance 'A' undergoes conversion by elementary step to 'B' and 'C' in aqueous phase as shown:A(aq)+H2O→B(aq)+C(aq)If concentration of A(aq) initially and after 6.93 minutes is 1 M & 14 M respectively then calculate rate constant in terms of M−1min−1.(Given: log2=0.3010)
Answer» A substance ' $A$ ' undergoes conversion by elementary step to ' $B$ ' and ' $C$ ' in aqueous phase as shown: $A_{(a q)} + H_{2} O \to B_{(a q)} + C_{(a q)}$ If concentration of $A_{(a q)}$ initially and after $6.93$ minutes is $1 M$ & $\frac{1}{4} M$ respectively then calculate rate constant in terms of $M^{- 1} {min}^{- 1}$ . (Given: $log 2 = 0.3010$ )

Discussion

10.	The amount of energy released on addition of an electron in the outermost shell of atoms is called?
Answer» The amount of energy released on addition of an electron in the outermost shell of atoms is called?

Discussion

11.	Forthe reaction at 298 K,2A+ B → CΔH= 400 kJmol–1and ΔS= 0.2 kJK–1mol–1Atwhat temperature will the reaction become spontaneous considering ΔHand ΔSto beconstant over the temperature range?
Answer» For the reaction at 298 K, 2A + B → C ΔH = 400 kJ mol^–1 and ΔS = 0.2 kJ K^–1 mol^–1 At what temperature will the reaction become spontaneous considering ΔH and ΔS to be constant over the temperature range?

11.

Forthe reaction at 298 K,2A+ B → CΔH= 400 kJmol–1and ΔS= 0.2 kJK–1mol–1Atwhat temperature will the reaction become spontaneous considering ΔHand ΔSto beconstant over the temperature range?

Answer»

For
the reaction at 298 K,

2A
+ B → C

ΔH
= 400 kJ
mol^–1
and ΔS
= 0.2 kJ
K^–1
mol^–1

At
what temperature will the reaction become spontaneous considering ΔH
and ΔS
to be
constant over the temperature range?

Discussion

12.	The isomer of diethyl ether is?
Answer» The isomer of diethyl ether is?

Discussion

13.	The advantage of fuel cells is that they can be:
Answer» The advantage of fuel cells is that they can be:

Discussion

14.	In the following reaction, which of the options acts as an oxidising agent? Fe2++2H++NO−3→Fe3++NO2+H2O
Answer» In the following reaction, which of the options acts as an oxidising agent? $F e^{2 +} + 2 H^{+} + N O_{3}^{-} \to F e^{3 +} + N O_{2} + H_{2} O$

Discussion

15.	Thedrain cleaner, Drainex contains small bits of aluminum which reactwith caustic soda to produce dihydrogen. What volume of dihydrogen at20 °C and one bar will be released when 0.15g of aluminum reacts?
Answer» 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 0.15g of aluminum reacts?

Discussion

16.	Which of the following alkynes is least acidic?
Answer» Which of the following alkynes is least acidic?

Discussion

17.	Which phenomenon illustrates nature of light waves? (a) Interference (b) Diffraction (c) Polarization (d) None of the above
Answer» Which phenomenon illustrates nature of light waves? (a) Interference (b) Diffraction (c) Polarization (d) None of the above

Discussion

18.	40.Four solutions of K2SO4 with the following concentrations 0.1m,0.01m,0.001m,0.0001m are available. the maximum. Value of vant Hoff factor is A)0.0001m solution B)0.001m solution C)0.01m solution D)0.1m solution
Answer» 40.Four solutions of K2SO4 with the following concentrations 0.1m,0.01m,0.001m,0.0001m are available. the maximum. Value of vant Hoff factor is A)0.0001m solution B)0.001m solution C)0.01m solution D)0.1m solution

Discussion

19.	Derivation of rate cons†an t for nth order of reactio
Answer» Derivation of rate cons†an t for nth order of reactio

Discussion

20.	In which of the following dimer empty atomic orbitalof central atom of monomer does not involve in hybridisation?(1) Ga2H6 (2) Al2Br6, (3) Be2H4, (4) Cl2O
Answer» In which of the following dimer empty atomic orbitalof central atom of monomer does not involve in hybridisation?(1) Ga2H6 (2) Al2Br6, (3) Be2H4, (4) Cl2O

Discussion

21.	Which of the following atoms is not used in the formation of interstitial compounds of transition metals?
Answer» Which of the following atoms is not used in the formation of interstitial compounds of transition metals?

Discussion

22.	ntCalculate the mass of 60% H2SO4 required to decompose 50 gm chalk?n
Answer» ntCalculate the mass of 60% H2SO4 required to decompose 50 gm chalk?n

Discussion

23.	how to find the dimentional formula and SI units
Answer» how to find the dimentional formula and SI units

Discussion

24.	For the reaction A+B-----C+D , doubling the concentration of both the reactant increases the reaction rate by 8 times and doubling the concentration of only B simply doublea the reaction rate. Find the rate law for the above equation.
Answer» For the reaction A+B-----C+D , doubling the concentration of both the reactant increases the reaction rate by 8 times and doubling the concentration of only B simply doublea the reaction rate. Find the rate law for the above equation.

Discussion

25.	The energy of an electron in nth state of hydrogen atom is given by En=-(13.6/n^2)eV. Calculate the energy and frequency of photon radiated when the electron de-excites from the first excited state to the ground state. To which spectral series does this photon belong?
Answer» The energy of an electron in nth state of hydrogen atom is given by En=-(13.6/n^2)eV. Calculate the energy and frequency of photon radiated when the electron de-excites from the first excited state to the ground state. To which spectral series does this photon belong?

Discussion

26.	The most basic among the following compound is
Answer» The most basic among the following compound is

Discussion

27.	What do you mean by catenation?
Answer» What do you mean by catenation?

Discussion

28.	If NaCl is doped with 10−4 mol% SrCl2, the concentration of cation vacancies will be (NA=6.02×1023mol−1)
Answer» If NaCl is doped with $10^{- 4} m o l % S r C l_{2}$ , the concentration of cation vacancies will be $(N_{A} = 6.02 \times 10^{23} m o l^{- 1})$

Discussion

29.	Pair the addition statements with the correct images.
Answer» Pair the addition statements with the correct images.

Discussion

30.	What is the colour of aqueous solution of barium chloride?
Answer» What is the colour of aqueous solution of barium chloride?

Discussion

31.	A solution contains 0.1 M H2S and 0.3 M HCl. Calculate the conc. of S2− and HS− ions in solution, Given Ka1 and Ka2 for H2S are 10−7 and 1.3×10−13 respectively.
Answer» A solution contains 0.1 M $H_{2} S$ and 0.3 M HCl. Calculate the conc. of $S^{2 -}$ and $H S^{-}$ ions in solution, Given $K_{a_{1}}$ and $K_{a_{2}}$ for $H_{2} S$ are $10^{- 7}$ and $1.3 \times 10^{- 13}$ respectively.

Discussion

32.	what is berzelius hypothesis?
Answer» what is berzelius hypothesis?

Discussion

33.	In which of the following the enol form is dominant over keto form?
Answer» In which of the following the enol form is dominant over keto form?

Discussion

34.	In which process, the fuel on heating decomposes into simpler components?
Answer» In which process, the fuel on heating decomposes into simpler components?

Discussion

35.	Calculate the molality of 1L solution of 99% of H2SO4 (weight/volume) .the density of the solution is 1.84 g/ml.
Answer» Calculate the molality of 1L solution of 99% of H2SO4 (weight/volume) .the density of the solution is 1.84 g/ml.

Discussion

36.	8 g impure na2co3 is put in 1 L water . 10 ml of this solution required 9 ml 0.1 N hcl for complete neutralization . the percentage purity of na2co3 sample
Answer» 8 g impure na2co3 is put in 1 L water . 10 ml of this solution required 9 ml 0.1 N hcl for complete neutralization . the percentage purity of na2co3 sample

Discussion

37.	what is lawer
Answer» what is lawer

Discussion

38.	19. Formula mass of NaCl is 58.5 g/mol and density of its pure form is 2.167 g/cm3. The averagedistance between adjacent Na\ast and Cl ions in the crystal is 2.814 x 10-8 cm. Calculate the valueof Avogadro's number.
Answer» 19. Formula mass of NaCl is 58.5 g/mol and density of its pure form is 2.167 g/cm3. The averagedistance between adjacent Na\ast and Cl ions in the crystal is 2.814 x 10-8 cm. Calculate the valueof Avogadro's number.

Discussion

39.	Are biphenyls planar if substituent at ortho position are not bulky?
Answer» Are biphenyls planar if substituent at ortho position are not bulky?

Discussion

40.	What are exergonic processes
Answer» What are exergonic processes

Discussion

41.	The change in entropy (ΔS) in an adsorption process will be
Answer» The change in entropy ( $Δ S$ ) in an adsorption process will be

Discussion

42.	The mass percentage composition of dry air at sea level contains approximately 75.5% N2. If the total atmospheric pressure is 1 atm ,then the partial pressure of nitrogen in (a)0.91atm (b)0.56atm (c)0.66atm (d)0.78atm
Answer» The mass percentage composition of dry air at sea level contains approximately 75.5% N2. If the total atmospheric pressure is 1 atm ,then the partial pressure of nitrogen in (a)0.91atm (b)0.56atm (c)0.66atm (d)0.78atm

Discussion

43.	A nitrogenaous compound with molecular mass 180 g/mol shows an increase in molecular mass to 348 g/mol on treatment with a acetyl chloride. The number of possible NH2 groups in the molecule is:
Answer» A nitrogenaous compound with molecular mass $180 g/mol$ shows an increase in molecular mass to $348 g/mol$ on treatment with a acetyl chloride. The number of possible $N H_{2}$ groups in the molecule is:

Discussion

44.	Indicate the types of isomerism exhibited by the following complexes and draw the structures for those isomers C\lbrack{(NH3)}_5(NO2)\rbrack{(NO3)}_2
Answer» Indicate the types of isomerism exhibited by the following complexes and draw the structures for those isomers C\lbrack{(NH3)}_5(NO2)\rbrack{(NO3)}_2

Discussion

45.	In Bohr’s model of hydrogen atom, for dynamic stable orbit, relation between orbit radius (r) and speed of electron (v) is [e− charge on an electron, m− mass of an electron]
Answer» In Bohr’s model of hydrogen atom, for dynamic stable orbit, relation between orbit radius $(r)$ and speed of electron $(v)$ is $[e -$ charge on an electron, $m -$ mass of an electron $]$

Discussion

46.	The total number of possible isomers for Pt(NH3)4Cl2Br2 is:
Answer» The total number of possible isomers for $P t (N H_{3})_{4} C l_{2} B r_{2}$ is:

Discussion

47.	Which of the following is the strongest base?
Answer» Which of the following is the strongest base?

Discussion

48.	Why alkaline hydrolysis of esters is preferred over acidic hydrolysis?
Answer» Why alkaline hydrolysis of esters is preferred over acidic hydrolysis?

Discussion

49.	What are heterorophic bacteria?
Answer» What are heterorophic bacteria?

Discussion

50.	At a temperature under high pressure Kw=10−10, A solution of pH =5.4 ; Under these conditions is said to be -
Answer» At a temperature under high pressure $K_{w} = 10^{- 10}$ , A solution of pH =5.4 ; Under these conditions is said to be -

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

On an industrial scale, H2O2 is prepared by oxidation of:

when chloro benzenr is reacted with KNH2in presence of liq ammonia product formed is a)3-chloro aniline b) aniline c)2-chloro aniline d)4-chloro aniline

During the electrolysis of an electrolyte, the number of ions produced, is directly proportional to the [AFMC 2002]

Find the value of log 0.002

50. The amount of H2O2 present in 1L of 1.5 N H2O2 solution is (1) 2.5 (2) 25.5 (3) 3.0 (4) 8.0

26. The EMF of the cell Mn\vert Mn+(0.02M)\vert\vert H+(1M)\vert H2(g)(1atm), Pt at 25℃ is 0.18 V. Then the valency of the metal is, if the Standard oxidation potential of the metal is 0.76 V.

IUPAC name of CH2=CH-CH2- and CH3-CH=CH- groups respectively.

A substance 'A' undergoes conversion by elementary step to 'B' and 'C' in aqueous phase as shown:A(aq)+H2O→B(aq)+C(aq)If concentration of A(aq) initially and after 6.93 minutes is 1 M &amp; 14 M respectively then calculate rate constant in terms of M−1min−1.(Given: log2=0.3010)

The amount of energy released on addition of an electron in the outermost shell of atoms is called?

Forthe reaction at 298 K,2A+ B → CΔH= 400 kJmol–1and ΔS= 0.2 kJK–1mol–1Atwhat temperature will the reaction become spontaneous considering ΔHand ΔSto beconstant over the temperature range?

The isomer of diethyl ether is?

The advantage of fuel cells is that they can be:

In the following reaction, which of the options acts as an oxidising agent? Fe2++2H++NO−3→Fe3++NO2+H2O

Thedrain cleaner, Drainex contains small bits of aluminum which reactwith caustic soda to produce dihydrogen. What volume of dihydrogen at20 °C and one bar will be released when 0.15g of aluminum reacts?

Which of the following alkynes is least acidic?

Which phenomenon illustrates nature of light waves? (a) Interference (b) Diffraction (c) Polarization (d) None of the above

40.Four solutions of K2SO4 with the following concentrations 0.1m,0.01m,0.001m,0.0001m are available. the maximum. Value of vant Hoff factor is A)0.0001m solution B)0.001m solution C)0.01m solution D)0.1m solution

Derivation of rate cons†an t for nth order of reactio

In which of the following dimer empty atomic orbitalof central atom of monomer does not involve in hybridisation?(1) Ga2H6 (2) Al2Br6, (3) Be2H4, (4) Cl2O

Which of the following atoms is not used in the formation of interstitial compounds of transition metals?

ntCalculate the mass of 60% H2SO4 required to decompose 50 gm chalk?n

how to find the dimentional formula and SI units

For the reaction A+B-----C+D , doubling the concentration of both the reactant increases the reaction rate by 8 times and doubling the concentration of only B simply doublea the reaction rate. Find the rate law for the above equation.

The energy of an electron in nth state of hydrogen atom is given by En=-(13.6/n^2)eV. Calculate the energy and frequency of photon radiated when the electron de-excites from the first excited state to the ground state. To which spectral series does this photon belong?

The most basic among the following compound is

What do you mean by catenation?

If NaCl is doped with 10−4 mol% SrCl2, the concentration of cation vacancies will be (NA=6.02×1023mol−1)

Pair the addition statements with the correct images.

What is the colour of aqueous solution of barium chloride?

A solution contains 0.1 M H2S and 0.3 M HCl. Calculate the conc. of S2− and HS− ions in solution, Given Ka1 and Ka2 for H2S are 10−7 and 1.3×10−13 respectively.

what is berzelius hypothesis?

In which of the following the enol form is dominant over keto form?

In which process, the fuel on heating decomposes into simpler components?

Calculate the molality of 1L solution of 99% of H2SO4 (weight/volume) .the density of the solution is 1.84 g/ml.

8 g impure na2co3 is put in 1 L water . 10 ml of this solution required 9 ml 0.1 N hcl for complete neutralization . the percentage purity of na2co3 sample

what is lawer

19. Formula mass of NaCl is 58.5 g/mol and density of its pure form is 2.167 g/cm3. The averagedistance between adjacent Na\ast and Cl ions in the crystal is 2.814 x 10-8 cm. Calculate the valueof Avogadro's number.

Are biphenyls planar if substituent at ortho position are not bulky?

What are exergonic processes

The change in entropy (ΔS) in an adsorption process will be

The mass percentage composition of dry air at sea level contains approximately 75.5% N2. If the total atmospheric pressure is 1 atm ,then the partial pressure of nitrogen in (a)0.91atm (b)0.56atm (c)0.66atm (d)0.78atm

A nitrogenaous compound with molecular mass 180 g/mol shows an increase in molecular mass to 348 g/mol on treatment with a acetyl chloride. The number of possible NH2 groups in the molecule is:

Indicate the types of isomerism exhibited by the following complexes and draw the structures for those isomers C\lbrack{(NH3)}_5(NO2)\rbrack{(NO3)}_2

In Bohr’s model of hydrogen atom, for dynamic stable orbit, relation between orbit radius (r) and speed of electron (v) is [e− charge on an electron, m− mass of an electron]

The total number of possible isomers for Pt(NH3)4Cl2Br2 is:

Which of the following is the strongest base?

Why alkaline hydrolysis of esters is preferred over acidic hydrolysis?

What are heterorophic bacteria?

At a temperature under high pressure Kw=10−10, A solution of pH =5.4 ; Under these conditions is said to be -

A substance 'A' undergoes conversion by elementary step to 'B' and 'C' in aqueous phase as shown:A(aq)+H2O→B(aq)+C(aq)If concentration of A(aq) initially and after 6.93 minutes is 1 M & 14 M respectively then calculate rate constant in terms of M−1min−1.(Given: log2=0.3010)