46295 + Interview Questions in Chemistry

1.	G (Gibb's free energy) for every solution is said to be less than 0. but isn't it false to say that as in the non ideal solution with positive deviation the gibbs free energy should increase? and S (entropy) of a solution is also always greater than 0?
Answer» G (Gibb's free energy) for every solution is said to be less than 0. but isn't it false to say that as in the non ideal solution with positive deviation the gibbs free energy should increase? and S (entropy) of a solution is also always greater than 0?

Discussion

2.	total no. of hydrogen ions in the millionth part of 1.33ml of pure water is
Answer» total no. of hydrogen ions in the millionth part of 1.33ml of pure water is

Discussion

3.	In a face centered lattice of X and Y, X atoms are present at the corners while Y atoms are at face centers. What would be the simplest formula of the compound if one of the X atoms is missing from a corner in each unit cell?
Answer» In a face centered lattice of X and Y, X atoms are present at the corners while Y atoms are at face centers. What would be the simplest formula of the compound if one of the X atoms is missing from a corner in each unit cell?

Discussion

4.	Amongst the elements with following electronic configurations, which one may have the highest ionisation energy? [CBSE AIPMT 2009]
Answer» Amongst the elements with following electronic configurations, which one may have the highest ionisation energy? [CBSE AIPMT 2009]

Discussion

5.	A 22.4 L glass bulb has a total pressure of 760 torr at 0∘C and contains three different gases,nitrogen, helium and argon. If the partial pressure of nitrogen is 250 torrand the partial pressureof argon is 130 torr .Given R=62.363L.torr.mol−1K−1Then the number of moles of helium in the bulb will be
Answer» A $22.4 L$ glass bulb has a total pressure of $760 t o r r$ at $0^{\circ} C$ and contains three different gases, nitrogen, helium and argon. If the partial pressure of nitrogen is $250 t o r r$ and the partial pressure of argon is $130 t o r r$ . Given $R = 62.363 L . t o r r . m o l^{- 1} K^{- 1}$ Then the number of moles of helium in the bulb will be

Discussion

6.	The weight of 350 ml of a diatomic gas at 0^°c and 2 atm pressure is 1g. The weight of one atom is :
Answer» The weight of 350 ml of a diatomic gas at 0^°c and 2 atm pressure is 1g. The weight of one atom is :

Discussion

7.	The crystal lattice of electrovalent compound is composed of12.(1) Atoms(2) Molecules(4) Both molecules and ions(3Oppositely charged ions
Answer» The crystal lattice of electrovalent compound is composed of12.(1) Atoms(2) Molecules(4) Both molecules and ions(3Oppositely charged ions

Discussion

8.	Is d pi - d pi bond strength more than p-pi p-pi bond strength ? Also give reason.
Answer» Is d pi - d pi bond strength more than p-pi p-pi bond strength ? Also give reason.

Discussion

9.	C_2O_4^{-2} + H_2SO_4 †extemdash†extemdash†extemdash→ CO_2 + H_2S Calculate the mass of oxalate ion & sulphuric acid to produce 1.7gm of H_2S
Answer» C_2O_4^{-2} + H_2SO_4 †extemdash†extemdash†extemdash→ CO_2 + H_2S Calculate the mass of oxalate ion & sulphuric acid to produce 1.7gm of H_2S

Discussion

10.	here r/nCr=(n-r)/nCn-r how it is possble because its true that nCr=nCn-r but how n-r=r as in numerator
Answer» here r/nCr=(n-r)/nCn-r how it is possble because its true that nCr=nCn-r but how n-r=r as in numerator

Discussion

11.	A glass capillary tube of inner diameter 0.28 mmis lowered vertically into water in a vessel. Thepressure to be applied on the water in the capillarytube sothat water level in the tubeis same as that in the vessel is (surfacetension of water 0.07 N/m and atmosphericpressure = 105 N/m2).COOP(2) 99 x 103(1) 103(4) 101 x 103(3) 100 x 103
Answer» A glass capillary tube of inner diameter 0.28 mmis lowered vertically into water in a vessel. Thepressure to be applied on the water in the capillarytube sothat water level in the tubeis same as that in the vessel is (surfacetension of water 0.07 N/m and atmosphericpressure = 105 N/m2).COOP(2) 99 x 103(1) 103(4) 101 x 103(3) 100 x 103

Discussion

12.	Which among the following groups shows maximum electron withdrawing effect?
Answer» Which among the following groups shows maximum electron withdrawing effect?

Discussion

13.	15.Calculate the total number of atoms in 2 litre gaseous mixture of ch4 and SO2 at STP which have vapour density 26?
Answer» 15.Calculate the total number of atoms in 2 litre gaseous mixture of ch4 and SO2 at STP which have vapour density 26?

Discussion

14.	Which of the following elements has a big jump from its IE1 to IE2?
Answer» Which of the following elements has a big jump from its $I E_{1}$ to $I E_{2}$ ?

Discussion

15.	The isotopes whose extra neutrons are unstable and spontaneous breaks up emitting radiation are called___.Radio Isotopes
Answer» The isotopes whose extra neutrons are unstable and spontaneous breaks up emitting radiation are called___. Radio Isotopes

15.

The isotopes whose extra neutrons are unstable and spontaneous breaks up emitting radiation are called___.Radio Isotopes

Answer»

The isotopes whose extra neutrons are unstable and spontaneous breaks up emitting radiation are called___.

Radio Isotopes

Discussion

16.	What was Navaratna Policy? Make a list of companies included in Navratnas.
Answer» What was Navaratna Policy? Make a list of companies included in Navratnas.

Discussion

17.	explain the graph between intensity and wavelength with respect to temperature in black-body radiation .
Answer» explain the graph between intensity and wavelength with respect to temperature in black-body radiation .

Discussion

18.	Ratio of the radii of two Bohr orbits of H-atom is 4:1.what would be the nomenclature.options are below 1. K & L 2. L & K 3. N & L 4. 2&3 BOTH The answer given is 4th option Bt I think it may be 2nd option.
Answer» Ratio of the radii of two Bohr orbits of H-atom is 4:1.what would be the nomenclature.options are below 1. K & L 2. L & K 3. N & L 4. 2&3 BOTH The answer given is 4th option Bt I think it may be 2nd option.

18.

Ratio of the radii of two Bohr orbits of H-atom is 4:1.what would be the nomenclature.options are below 1. K & L 2. L & K 3. N & L 4. 2&3 BOTH The answer given is 4th option Bt I think it may be 2nd option.

Answer»

Ratio of the radii of two Bohr orbits of H-atom is 4:1.what would be the nomenclature.options are below

1. K & L

2. L & K

3. N & L

4. 2&3 BOTH

The answer given is 4th option

Bt I think it may be 2nd option.

Discussion

19.	A hydrocarbon (X) of the formula C6H12 does not react with bromine water but reacts with the bromine in presence of light, forming compound (Y). Y on treatment with alc. KOH gives compound (Z) which on ozonolysis gives (T) of the formula C6H10O2. T reduces Tollens's reagent which give compound (W) on acidification. W gives iodoform test and after acidification produces compound (U) which when heated with P2O5 forms a cyclic anhydride (V).
Answer» A hydrocarbon (X) of the formula $C_{6} H_{12}$ does not react with bromine water but reacts with the bromine in presence of light, forming compound (Y). Y on treatment with alc. $K O H$ gives compound (Z) which on ozonolysis gives (T) of the formula $C_{6} H_{10} O_{2}$ . T reduces Tollens's reagent which give compound (W) on acidification. W gives iodoform test and after acidification produces compound (U) which when heated with $P_{2} O_{5}$ forms a cyclic anhydride (V).

Discussion

20.	Which one of the following oxides can be correctly classified as a basic oxide?
Answer» Which one of the following oxides can be correctly classified as a basic oxide?

Discussion

21.	A reaction is 50% completed in 30 minutes and 87.5% completed in 90 minutes. The order of reaction is
Answer» A reaction is 50% completed in 30 minutes and 87.5% completed in 90 minutes. The order of reaction is

Discussion

22.	Q9)Complete the series: CMM, EOO, GQQ, _____, KUU
Answer» Q9)Complete the series: CMM, EOO, GQQ, _____, KUU

22.

Q9)Complete the series: CMM, EOO, GQQ, _____, KUU

Answer»

Q9)Complete the series:

CMM, EOO, GQQ, _____, KUU

Discussion

23.	Pressure-temperature relationship for an ideal gas undergoing adiabatic change is
Answer» Pressure-temperature relationship for an ideal gas undergoing adiabatic change is

Discussion

24.	Given below are a few electrolytes, indicate which one among them will bring about the coagulation of a gold sol. quickest and in the least of concentration?
Answer» Given below are a few electrolytes, indicate which one among them will bring about the coagulation of a gold sol. quickest and in the least of concentration?

Discussion

25.	GivenE∘Cl2/Cl−=1.36 V,ECr3+/Cr=−0.74 VECr2O2−7/Cr3+=1.33 V,E∘MnO−4/Mn2+=1.51 VAmong the following, the strongest reducing agent is:
Answer» Given $E_{C l_{2} / C l^{-}}^{\circ} = 1.36 V, E_{C r^{3 +} / C r} = - 0.74 V$ $E_{C r_{2} O_{7}^{2 -} / C r^{3 +}} = 1.33 V, E_{M n O_{4}^{-} / M n^{2 +}}^{\circ} = 1.51 V$ Among the following, the strongest reducing agent is:

Discussion

26.	You are given the following reduction reactions and E∘ values:Fe3+(aq)+e−→Fe2+(aq) E∘=+0.771 VFe2+(aq)+2e−→Fe(s) E∘=−0.447 VCalculate E∘ for the half-cell reaction Fe3+(aq)+3e−→Fe(s).
Answer» You are given the following reduction reactions and $E^{\circ}$ values: $F e^{3 +} (a q) + e^{-} \to F e^{2 +} (a q) E^{\circ} = + 0.771 V$ $F e^{2 +} (a q) + 2 e^{-} \to F e (s) E^{\circ} = - 0.447 V$ Calculate $E^{\circ}$ for the half-cell reaction $F e^{3 +} (a q) + 3 e^{-} \to F e (s)$ .

Discussion

27.	Conc. Aq H2so4 is 98% by mass and has density of 1.80 gm per lit. Volume of acid req. To make 1 lit of 0.1 m h2so4 solution is
Answer» Conc. Aq H2so4 is 98% by mass and has density of 1.80 gm per lit. Volume of acid req. To make 1 lit of 0.1 m h2so4 solution is

Discussion

28.	26 what happens when electricity is passed through aqueous solution of NaCl
Answer» 26 what happens when electricity is passed through aqueous solution of NaCl

Discussion

29.	600 ml of a mixture of O2 and o3 weighs 1 g at NTP . Calculate the volume of o3 in the mixture
Answer» 600 ml of a mixture of O2 and o3 weighs 1 g at NTP . Calculate the volume of o3 in the mixture

Discussion

30.	Equal masses of two liquids are filled in two similar calorimeters. The rate of cooling will
Answer» Equal masses of two liquids are filled in two similar calorimeters. The rate of cooling will

Discussion

31.	What is the name of the process for industrial preparation of sulphuric acid?
Answer» What is the name of the process for industrial preparation of sulphuric acid?

Discussion

32.	Maximum number of electrons in a subshell with l = 3 and n = 4 is:
Answer» Maximum number of electrons in a subshell with l = 3 and n = 4 is:

Discussion

33.	number of geometrical isomers possible for CH_3-CH_2-CH=C=C=CH-CH_2-CH_3
Answer» number of geometrical isomers possible for CH_3-CH_2-CH=C=C=CH-CH_2-CH_3

Discussion

34.	How are clouds formed?How does artificial rain occur when electrified salt is sprayed over clouds?
Answer» How are clouds formed?How does artificial rain occur when electrified salt is sprayed over clouds?

Discussion

35.	When thus zinc blende type ( sphalerite) and wurtzite occur and what is difference between them?
Answer» When thus zinc blende type ( sphalerite) and wurtzite occur and what is difference between them?

Discussion

36.	Q-1 why gay lussac's law is not obey when reactants are not gas?
Answer» Q-1 why gay lussac's law is not obey when reactants are not gas?

Discussion

37.	In order to conclude the resonating structure's stability we should to give more priority to either to the presence of the formal charge or to the octet configuration ?
Answer» In order to conclude the resonating structure's stability we should to give more priority to either to the presence of the formal charge or to the octet configuration ?

Discussion

38.	The observed heat of formation of CH3COOH(g) is -439 kJ. The enthalpy of resonance of CH3COOH(g) is X kJ from the given data. Find the value of \|X\|. Bond energy (kJ)Heat of atomization(kJ)C-H = 413C (solid)=716C-C = 348H2=436C=O = 732O2=498C-O = 351O-H = 463
Answer» The observed heat of formation of $C H_{3} C O O H (g)$ is -439 kJ. The enthalpy of resonance of $C H_{3} C O O H (g)$ is $X$ kJ from the given data. Find the value of $\| X \|$ . $\begin{matrix} Bond energy (kJ) & Heat of atomization(kJ) C-H = 413 & C (solid)=716 C-C = 348 & H_{2} = 436 C=O = 732 & O_{2} = 498 C-O = 351 O-H = 463 \end{matrix}$

Discussion

39.	Among Al2O3,SiO2,P2O3 and SO2 the correct order of acid strength is:
Answer» Among $A l_{2} O_{3}, S i O_{2}, P_{2} O_{3}$ and $S O_{2}$ the correct order of acid strength is:

Discussion

40.	The periodic table consists of 18 groups. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element X as shown below. To which group, element X belongs in the periodic table?___ 6329Cu+11H→610n+42α+211H+X
Answer» The periodic table consists of 18 groups. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element X as shown below. To which group, element X belongs in the periodic table?___ $_{29}^{63} C u +_{1}^{1} H \to 6_{0}^{1} n +_{2}^{4} α + 2_{1}^{1} H + X$

Discussion

41.	One mole of Al is deposited by X coulombs of charge by passing through molten AlCl3. The number of moles of Ag deposited by the same charge from silver nitrate solution is
Answer» One mole of Al is deposited by X coulombs of charge by passing through molten AlCl₃. The number of moles of Ag deposited by the same charge from silver nitrate solution is

Discussion

42.	The least polar among the following is
Answer» The least polar among the following is

Discussion

43.	Which of the following carboxylic acids undergoes decarboxylation easily ?
Answer» Which of the following carboxylic acids undergoes decarboxylation easily ?

Discussion

44.	Asample of pure PCl5was introduced into an evacuated vessel at 473 K. After equilibriumwas attained, concentration of PCl5was found to be0.5× 10–1mol L–1.If value of Kcis 8.3 × 10–3,what are the concentrations of PCl3and Cl2at equilibrium?
Answer» A sample of pure PCl₅ was introduced into an evacuated vessel at 473 K. After equilibrium was attained, concentration of PCl₅ was found to be 0.5 × 10^–1 mol L^–1. If value of K_c is 8.3 × 10^–3, what are the concentrations of PCl₃ and Cl₂ at equilibrium?

44.

Asample of pure PCl5was introduced into an evacuated vessel at 473 K. After equilibriumwas attained, concentration of PCl5was found to be0.5× 10–1mol L–1.If value of Kcis 8.3 × 10–3,what are the concentrations of PCl3and Cl2at equilibrium?

Answer»

A
sample of pure PCl₅
was introduced into an evacuated vessel at 473 K. After equilibrium
was attained, concentration of PCl₅
was found to be

0.5
× 10^–1
mol L^–1.
If value of K_c
is 8.3 × 10^–3,
what are the concentrations of PCl₃
and Cl₂
at equilibrium?

Discussion

45.	[Fe(CN)6]3⊖ has a magnetic moment of 1.73 BM. Thus hybridization of Fe is
Answer» $[F e (C N)_{6}]^{3 ⊖}$ has a magnetic moment of 1.73 BM. Thus hybridization of Fe is

Discussion

46.	(i) What is the role of benzoyl peroxide in the polymerization of ethene?(ii) Identify the monomers in the following polymer:(iii) Arrange the following polymers in the increasing order of their intermolecular forces:Nylon-6, 6, Polythene, Buna-S
Answer» (i) What is the role of benzoyl peroxide in the polymerization of ethene? (ii) Identify the monomers in the following polymer: (iii) Arrange the following polymers in the increasing order of their intermolecular forces: Nylon-6, 6, Polythene, Buna-S

Discussion

47.	Suggest a reagent for the following conversion.
Answer» Suggest a reagent for the following conversion.

Discussion

48.	The splitting of d orbital will be more in F- as compared to Cl-because
Answer» The splitting of d orbital will be more in F^- as compared to Cl^-because

Discussion

49.	What are enzymes ? Write in brief the mechanism of enzyme catalysis ?
Answer» What are enzymes ? Write in brief the mechanism of enzyme catalysis ?

Discussion

50.	Therate constant for the first order decomposition of H2O2is given by the following equation:logk =14.34 − 1.25 × 104K/TCalculateEafor this reaction and at what temperature will its half-period be 256minutes?
Answer» The rate constant for the first order decomposition of H₂O₂ is given by the following equation: log k = 14.34 − 1.25 × 10⁴K/T Calculate E_a for this reaction and at what temperature will its half-period be 256 minutes?

50.

Therate constant for the first order decomposition of H2O2is given by the following equation:logk =14.34 − 1.25 × 104K/TCalculateEafor this reaction and at what temperature will its half-period be 256minutes?

Answer»

The
rate constant for the first order decomposition of H₂O₂
is given by the following equation:

log
k =
14.34 − 1.25 × 10⁴K/T

Calculate
E_a
for this reaction and at what temperature will its half-period be 256
minutes?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

G (Gibb's free energy) for every solution is said to be less than 0. but isn't it false to say that as in the non ideal solution with positive deviation the gibbs free energy should increase? and S (entropy) of a solution is also always greater than 0?

total no. of hydrogen ions in the millionth part of 1.33ml of pure water is

In a face centered lattice of X and Y, X atoms are present at the corners while Y atoms are at face centers. What would be the simplest formula of the compound if one of the X atoms is missing from a corner in each unit cell?

Amongst the elements with following electronic configurations, which one may have the highest ionisation energy? [CBSE AIPMT 2009]

The weight of 350 ml of a diatomic gas at 0^°c and 2 atm pressure is 1g. The weight of one atom is :

The crystal lattice of electrovalent compound is composed of12.(1) Atoms(2) Molecules(4) Both molecules and ions(3Oppositely charged ions

Is d pi - d pi bond strength more than p-pi p-pi bond strength ? Also give reason.

C_2O_4^{-2} + H_2SO_4 †extemdash†extemdash†extemdash→ CO_2 + H_2S Calculate the mass of oxalate ion & sulphuric acid to produce 1.7gm of H_2S

here r/nCr=(n-r)/nCn-r how it is possble because its true that nCr=nCn-r but how n-r=r as in numerator

Which among the following groups shows maximum electron withdrawing effect?

15.Calculate the total number of atoms in 2 litre gaseous mixture of ch4 and SO2 at STP which have vapour density 26?

Which of the following elements has a big jump from its IE1 to IE2?

The isotopes whose extra neutrons are unstable and spontaneous breaks up emitting radiation are called___.Radio Isotopes

What was Navaratna Policy? Make a list of companies included in Navratnas.

explain the graph between intensity and wavelength with respect to temperature in black-body radiation .

Ratio of the radii of two Bohr orbits of H-atom is 4:1.what would be the nomenclature.options are below 1. K &amp; L 2. L &amp; K 3. N &amp; L 4. 2&amp;3 BOTH The answer given is 4th option Bt I think it may be 2nd option.

Which one of the following oxides can be correctly classified as a basic oxide?

A reaction is 50% completed in 30 minutes and 87.5% completed in 90 minutes. The order of reaction is

Q9)Complete the series: CMM, EOO, GQQ, _____, KUU

Pressure-temperature relationship for an ideal gas undergoing adiabatic change is

Given below are a few electrolytes, indicate which one among them will bring about the coagulation of a gold sol. quickest and in the least of concentration?

GivenE∘Cl2/Cl−=1.36 V,ECr3+/Cr=−0.74 VECr2O2−7/Cr3+=1.33 V,E∘MnO−4/Mn2+=1.51 VAmong the following, the strongest reducing agent is:

You are given the following reduction reactions and E∘ values:Fe3+(aq)+e−→Fe2+(aq) E∘=+0.771 VFe2+(aq)+2e−→Fe(s) E∘=−0.447 VCalculate E∘ for the half-cell reaction Fe3+(aq)+3e−→Fe(s).

Conc. Aq H2so4 is 98% by mass and has density of 1.80 gm per lit. Volume of acid req. To make 1 lit of 0.1 m h2so4 solution is

26 what happens when electricity is passed through aqueous solution of NaCl

600 ml of a mixture of O2 and o3 weighs 1 g at NTP . Calculate the volume of o3 in the mixture

Equal masses of two liquids are filled in two similar calorimeters. The rate of cooling will

What is the name of the process for industrial preparation of sulphuric acid?

Maximum number of electrons in a subshell with l = 3 and n = 4 is:

number of geometrical isomers possible for CH_3-CH_2-CH=C=C=CH-CH_2-CH_3

How are clouds formed?How does artificial rain occur when electrified salt is sprayed over clouds?

When thus zinc blende type ( sphalerite) and wurtzite occur and what is difference between them?

Q-1 why gay lussac's law is not obey when reactants are not gas?

In order to conclude the resonating structure's stability we should to give more priority to either to the presence of the formal charge or to the octet configuration ?

The observed heat of formation of CH3COOH(g) is -439 kJ. The enthalpy of resonance of CH3COOH(g) is X kJ from the given data. Find the value of |X|. Bond energy (kJ)Heat of atomization(kJ)C-H = 413C (solid)=716C-C = 348H2=436C=O = 732O2=498C-O = 351O-H = 463

Among Al2O3,SiO2,P2O3 and SO2 the correct order of acid strength is:

The periodic table consists of 18 groups. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element X as shown below. To which group, element X belongs in the periodic table?___ 6329Cu+11H→610n+42α+211H+X

One mole of Al is deposited by X coulombs of charge by passing through molten AlCl3. The number of moles of Ag deposited by the same charge from silver nitrate solution is

The least polar among the following is

Which of the following carboxylic acids undergoes decarboxylation easily ?

Asample of pure PCl5was introduced into an evacuated vessel at 473 K. After equilibriumwas attained, concentration of PCl5was found to be0.5× 10–1mol L–1.If value of Kcis 8.3 × 10–3,what are the concentrations of PCl3and Cl2at equilibrium?

[Fe(CN)6]3⊖ has a magnetic moment of 1.73 BM. Thus hybridization of Fe is

(i) What is the role of benzoyl peroxide in the polymerization of ethene?(ii) Identify the monomers in the following polymer:(iii) Arrange the following polymers in the increasing order of their intermolecular forces:Nylon-6, 6, Polythene, Buna-S

Suggest a reagent for the following conversion.

The splitting of d orbital will be more in F- as compared to Cl-because

What are enzymes ? Write in brief the mechanism of enzyme catalysis ?

Therate constant for the first order decomposition of H2O2is given by the following equation:logk =14.34 − 1.25 × 104K/TCalculateEafor this reaction and at what temperature will its half-period be 256minutes?

Ratio of the radii of two Bohr orbits of H-atom is 4:1.what would be the nomenclature.options are below 1. K & L 2. L & K 3. N & L 4. 2&3 BOTH The answer given is 4th option Bt I think it may be 2nd option.