46295 + Interview Questions in Chemistry

1.	The free energy of formation of NO is 78 kJ mol−1 at the temperature of 1000 K. What is the equilibrium constant for this reaction at 1000 K? 12N2(g)+12O2(g)⇌NO(g)
Answer» The free energy of formation of NO is $78 k J m o l^{- 1}$ at the temperature of $1000 K$ . What is the equilibrium constant for this reaction at $1000 K$ ? $\frac{1}{2} N_{2} (g) + \frac{1}{2} O_{2} (g) ⇌ N O (g)$

Discussion

2.	The specific heat of hydrogen gas at constant pressure is CP=3.4×103cal/kg∘C and at constant volume is CV=2.4×103cal/kg∘C. If one kilogram hydrogen gas is heated from 10∘C to 20∘C at constant pressure, the external work done on the gas to maintain it at constant pressure is
Answer» The specific heat of hydrogen gas at constant pressure is CP=3.4×103cal/kg∘C and at constant volume is CV=2.4×103cal/kg∘C. If one kilogram hydrogen gas is heated from 10∘C to 20∘C at constant pressure, the external work done on the gas to maintain it at constant pressure is

Discussion

3.	Which of the following amine will give the carbylamine test?
Answer» Which of the following amine will give the carbylamine test?

Discussion

4.	If one mole of carbon atoms weighs 12 grams, what is the mass (in grams) of 1 atom of carbon?
Answer» If one mole of carbon atoms weighs 12 grams, what is the mass (in grams) of 1 atom of carbon?

Discussion

5.	What is the pH value of the solution containing 0.01MHCl and 0.001M NaOH?
Answer» What is the pH value of the solution containing 0.01MHCl and 0.001M NaOH?

Discussion

6.	In a cubic packed structure of mixed oxides, the lattice is made up of oxide ions, one fifth of tetrahedral voids are occupied by divalent X2+ ions, while one-half of the octahedral voids are occupied by trivalent ions Y3+, then the formula of the oxide is:
Answer» In a cubic packed structure of mixed oxides, the lattice is made up of oxide ions, one fifth of tetrahedral voids are occupied by divalent $X^{2 +}$ ions, while one-half of the octahedral voids are occupied by trivalent ions $Y^{3 +}$ , then the formula of the oxide is:

Discussion

7.	7. E not of Galvanic cell is 1.1 volt standard free change can be given as 1)-212.30 kilo joule per mole 2) -21.227 joule per mole 3)+ 21.227 kilo joule per mole 4)+ 21.227 volt
Answer» 7. E not of Galvanic cell is 1.1 volt standard free change can be given as 1)-212.30 kilo joule per mole 2) -21.227 joule per mole 3)+ 21.227 kilo joule per mole 4)+ 21.227 volt

Discussion

8.	Why doesn't a glass slab refract white light like a glass prism?
Answer» Why doesn't a glass slab refract white light like a glass prism?

Discussion

9.	Which has zero dipole moment
Answer» Which has zero dipole moment

9.

Which has zero dipole moment

Answer»

Which has zero dipole moment

Discussion

10.	An exothermic reaction X→Y has an activation energy 30 kJ/mol. If energy change ΔE during the reaction is −20 kJ/mol, the activation energy for the reverse reaction in kJ/mol is ______.
Answer» An exothermic reaction $X \to Y$ has an activation energy $30 k J / m o l$ . If energy change $Δ E$ during the reaction is $- 20 k J / m o l,$ the activation energy for the reverse reaction in $k J / m o l$ is ______.

Discussion

11.	Which of the following(s) will not show geometrical isomerism?
Answer» Which of the following(s) will not show geometrical isomerism?

Discussion

12.	A photon was absorbed by a hydrogen atom and an electron was promoted to the 5th shell. When the excited electron returned to ground state, a visible photon and another quanta were emitted. Which transition is responsible for the emission of the other quanta?
Answer» A photon was absorbed by a hydrogen atom and an electron was promoted to the $5^{t h}$ shell. When the excited electron returned to ground state, a visible photon and another quanta were emitted. Which transition is responsible for the emission of the other quanta?

Discussion

13.	Given, H2S(g)→HS(g)+H(g);△Hrxn=379.6 kJmol−1 H2 (g)+S (s)→H2S (g); △H∘fH2S=−21.1 kJmol−1 H2(g)→2H(g) ; ΔH=438 kJmol−1 ΔHsublimation of S = 280 kJmol−1 Thus, △H∘fHS is
Answer» Given, $H_{2} S_{(g)} \to H S (g) + H (g); △ H_{r x n} = 379.6 k J m o l^{- 1}$ $H_{2} (g) + S (s) \to H_{2} S (g);$ $△ H_{f}^{\circ} H_{2} S = - 21.1$ $k J m o l^{- 1}$ $H_{2 (g)} \to 2 H_{(g)}$ ; $Δ H = 438 k J m o l^{- 1}$ $Δ H_{s u b l i m a t i o n}$ of S = $280 k J m o l^{- 1}$ Thus, $△ H_{f}^{\circ} H S$ is

Discussion

14.	The number of octahedral sites per sphere in F.C.C. structure is
Answer» The number of octahedral sites per sphere in F.C.C. structure is

Discussion

15.	why does the solubility of solid in liquid mixture increase with increase in temperature
Answer» why does the solubility of solid in liquid mixture increase with increase in temperature

Discussion

16.	Which element has the highest first IE?
Answer» Which element has the highest first IE?

Discussion

17.	Which of the following metal halide has the highest ionic character?(Here, M is monovalent metal)
Answer» Which of the following metal halide has the highest ionic character? (Here, $M$ is monovalent metal)

Discussion

18.	Which one of the following alkenes when treated with HCl yields majorly an anti-Markovnikov product?
Answer» Which one of the following alkenes when treated with $H C l$ yields majorly an anti-Markovnikov product?

Discussion

19.	27 Reaction of 1,3dichlorocyclobutane with Na in dry ether
Answer» 27 Reaction of 1,3dichlorocyclobutane with Na in dry ether

Discussion

20.	Find the number of formula units of FeSO4.7H2O present in 11 millimoles of FeSO4.7H2O.
Answer» Find the number of formula units of $F e S O_{4} .7 H_{2} O$ present in 11 millimoles of $F e S O_{4} .7 H_{2} O$ .

Discussion

21.	How does terminal alkyne react with NaNH2 .what is the product formed
Answer» How does terminal alkyne react with NaNH2 .what is the product formed

Discussion

22.	The spectrum produced by white light isOptions:Emission spectrum Continuous spectrumAbsorption spectrum Both emission and continuous spectrum
Answer» The spectrum produced by white light is Options: Emission spectrum Continuous spectrum Absorption spectrum Both emission and continuous spectrum

Discussion

23.	The dihedral angle between two methyl group in partially eclipsed conformation of n-butane is :
Answer» The dihedral angle between two methyl group in partially eclipsed conformation of n-butane is :

Discussion

24.	Assertion. N2O5 is more acidic than N2O3. Reason. Magnitude of positive charge is more on N2O5. 1 Both assertion and reason is true and reason is correct explanation of assertion 2 Both assertion and reason is true and reason is not correct explanation of assertion. 3. Reason is true and assertion is false. 4. Both assertion and reason is false
Answer» Assertion. N2O5 is more acidic than N2O3. Reason. Magnitude of positive charge is more on N2O5. 1 Both assertion and reason is true and reason is correct explanation of assertion 2 Both assertion and reason is true and reason is not correct explanation of assertion. 3. Reason is true and assertion is false. 4. Both assertion and reason is false

Discussion

25.	The distance between a compression and next rarefaction will be
Answer» The distance between a compression and next rarefaction will be

Discussion

26.	Assertion Lithium sulphate does not form alums. Reason Li+ is too small to form a stable lattice required for double-salt/alum formation.
Answer» Assertion Lithium sulphate does not form alums. Reason $L i^{+}$ is too small to form a stable lattice required for double-salt/alum formation.

26.

Assertion Lithium sulphate does not form alums. Reason Li+ is too small to form a stable lattice required for double-salt/alum formation.

Answer»

Assertion

Lithium sulphate does not form alums.

Reason

$L i^{+}$ is too small to form a stable lattice required for double-salt/alum formation.

Discussion

27.	Grignard reaction with methyl amine
Answer» Grignard reaction with methyl amine

Discussion

28.	50. The vapour pressure of a solution containing 2gm of an electrolyte AB in 100gm water is 751mm at 100^° C . What is degree of dissociation of XY? (molar mass of XY=40)
Answer» 50. The vapour pressure of a solution containing 2gm of an electrolyte AB in 100gm water is 751mm at 100^° C . What is degree of dissociation of XY? (molar mass of XY=40)

Discussion

29.	The complete hydrolysis of XeF6 results in the formation of
Answer» The complete hydrolysis of $X e F_{6}$ results in the formation of

Discussion

30.	142. The temperature of 5 moles of a gas at constantvolume is changed from 100^° C to 120^° C. Thecapacity of gas at constant volume will be (in joulelkelvin)(2) 8(4) 0.4(3) 0.8
Answer» 142. The temperature of 5 moles of a gas at constant volume is changed from 100^° C to 120^° C. The capacity of gas at constant volume will be (in joulel kelvin) (2) 8 (4) 0.4 (3) 0.8

Discussion

31.	Which conformation of glycol is the most acidic?
Answer» Which conformation of glycol is the most acidic?

Discussion

32.	calculate the ratio of the radius of 1st orbit of H atom to that of 4th orbi
Answer» calculate the ratio of the radius of 1st orbit of H atom to that of 4th orbi

Discussion

33.	Compound (C) in the following scheme of reactions is: nBu−C≡CHLiNH2−−−−→(A)i) PhCHO−−−−−−→ii) H2O(B)MnO2−−−−→(C)
Answer» Compound $(C)$ in the following scheme of reactions is: $n B u - C \equiv C H L i N H_{2} - --- \to (A) i) P h C H O - ----- \to i i) H_{2} O (B) M n O_{2} - --- \to (C)$

Discussion

34.	33. 3.2 Mole HI (g) was heated in a closed bulb until it received the equilibrium at 444 ^° C, then calculate the number of hydrogen iodide, hydrogen and iodide moles present at the equilibrium point found at 20% of its exaggeration. Calculation of the value of the constant determinant for 2HI (g) ___> H2 (g) + I2 (g) Suppose the volume of the letter is 1L.
Answer» 33. 3.2 Mole HI (g) was heated in a closed bulb until it received the equilibrium at 444 ^° C, then calculate the number of hydrogen iodide, hydrogen and iodide moles present at the equilibrium point found at 20% of its exaggeration. Calculation of the value of the constant determinant for 2HI (g) ___> H2 (g) + I2 (g) Suppose the volume of the letter is 1L.

Discussion

35.	Atomic weight of Boron is 10.81 and it has 2 isotopes 5B10 and 5B11, then the ratio of 5B10:5B11 in nature would be 1. 15:16 2. 10:11 3. 19:81 4. 81:19
Answer» Atomic weight of Boron is 10.81 and it has 2 isotopes 5B10 and 5B11, then the ratio of 5B10:5B11 in nature would be 1. 15:16 2. 10:11 3. 19:81 4. 81:19

Discussion

36.	Rate constant for a nth order reaction has the dimensions(Where M is concentration unit)
Answer» Rate constant for a $n^{t h}$ order reaction has the dimensions (Where M is concentration unit)

Discussion

37.	if at moment t is equal to the seperation between the cars is 90m and length of each car is 5m the moment they will compleletely cross each other is
Answer» if at moment t is equal to the seperation between the cars is 90m and length of each car is 5m the moment they will compleletely cross each other is

Discussion

38.	1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of the metal was formed. What is the equivalent weight of the metal?
Answer» 1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of the metal was formed. What is the equivalent weight of the metal?

Discussion

39.	Equal volumes of three acid solutions of pH 3, 4and 5 are mixed in a vessel. What will be theH+ ion concentration in the mixture?(1) 3.7 x 104 M(3) 1.11 x 103 M (4) 1.11 x 10-4 M(2) 3.7 x 10-3 M
Answer» Equal volumes of three acid solutions of pH 3, 4and 5 are mixed in a vessel. What will be theH+ ion concentration in the mixture?(1) 3.7 x 104 M(3) 1.11 x 103 M (4) 1.11 x 10-4 M(2) 3.7 x 10-3 M

Discussion

40.	Which of the following is a carbanion?
Answer» Which of the following is a carbanion?

Discussion

41.	8. If phenol is treated with HCN,HCl and Aluminium chloride what will be the product?
Answer» 8. If phenol is treated with HCN,HCl and Aluminium chloride what will be the product?

Discussion

42.	21.A 300m long train is moving with a uniform velocity of 90 km/he.The time taken by train to cross a bridge of length 1700m is?
Answer» 21.A 300m long train is moving with a uniform velocity of 90 km/he.The time taken by train to cross a bridge of length 1700m is?

Discussion

43.	Percentage of ionization of different acid/base will vary in water, like-H2SO4>H2SO3 or HI>HCl. So there will be different concentration of H3O+ /OH- for different acid/base. Then why according to 'Levelling effect of water' all the acids/ base will have same strength in water?
Answer» Percentage of ionization of different acid/base will vary in water, like-H2SO4>H2SO3 or HI>HCl. So there will be different concentration of H3O+ /OH- for different acid/base. Then why according to 'Levelling effect of water' all the acids/ base will have same strength in water?

Discussion

44.	what is ins†an teneous velocit
Answer» what is ins†an teneous velocit

Discussion

45.	A sample of H2O2 solution labelled as "28 volume" has density of 265 g/L. Mark the correct option(s) representing concentration of same solution in other units:
Answer» A sample of $H_{2} O_{2}$ solution labelled as " $28$ volume" has density of $265 g/L$ . Mark the correct option(s) representing concentration of same solution in other units:

Discussion

46.	What is equliliequi ?
Answer» What is equliliequi ?

Discussion

47.	Which of the following structures represent a cis form?
Answer» Which of the following structures represent a cis form?

Discussion

48.	Ph-CH(CH_3)-CH_2-CH_3\xrightarrow[{hv}]{Cl_2}Products\xrightarrow[{distillation}]{Fractional}Fractions, No. of products and no. of fractions are respectively; (1)6,5 (2)6,4 (3)10,5 4)6,3
Answer» Ph-CH(CH_3)-CH_2-CH_3\xrightarrow[{hv}]{Cl_2}Products\xrightarrow[{distillation}]{Fractional}Fractions, No. of products and no. of fractions are respectively; (1)6,5 (2)6,4 (3)10,5 4)6,3

Discussion

49.	(1) DEFINE THESE IN SHORT A. CRYSTALLINE SOLID B. AMOROPHOUS SOLID C. MOLECULAR SOLID D. IONIC SOLID E. METALLIC SOLID F. COVALENT OR NETWORK SOLID G. CRYSTAL LATTICE H. BRAVAIS LATTICE I. PRIMITIVE UNIT CELL J. CENTERED UNIT CELL K. BODY CENTERED UNIT CELL L. FACE CENTERED UNIT CELL M. END CENTERED UNIT CELL
Answer» (1) DEFINE THESE IN SHORT A. CRYSTALLINE SOLID B. AMOROPHOUS SOLID C. MOLECULAR SOLID D. IONIC SOLID E. METALLIC SOLID F. COVALENT OR NETWORK SOLID G. CRYSTAL LATTICE H. BRAVAIS LATTICE I. PRIMITIVE UNIT CELL J. CENTERED UNIT CELL K. BODY CENTERED UNIT CELL L. FACE CENTERED UNIT CELL M. END CENTERED UNIT CELL

49.

(1) DEFINE THESE IN SHORT A. CRYSTALLINE SOLID B. AMOROPHOUS SOLID C. MOLECULAR SOLID D. IONIC SOLID E. METALLIC SOLID F. COVALENT OR NETWORK SOLID G. CRYSTAL LATTICE H. BRAVAIS LATTICE I. PRIMITIVE UNIT CELL J. CENTERED UNIT CELL K. BODY CENTERED UNIT CELL L. FACE CENTERED UNIT CELL M. END CENTERED UNIT CELL

Answer»

(1) DEFINE THESE IN SHORT

A. CRYSTALLINE SOLID

B. AMOROPHOUS SOLID

C. MOLECULAR SOLID

D. IONIC SOLID

E. METALLIC SOLID

F. COVALENT OR NETWORK SOLID

G. CRYSTAL LATTICE

H. BRAVAIS LATTICE

I. PRIMITIVE UNIT CELL

J. CENTERED UNIT CELL

K. BODY CENTERED UNIT CELL

L. FACE CENTERED UNIT CELL

M. END CENTERED UNIT CELL

Discussion

50.	Which of the following will be having the highest bond enthalpy?
Answer» Which of the following will be having the highest bond enthalpy?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The free energy of formation of NO is 78 kJ mol−1 at the temperature of 1000 K. What is the equilibrium constant for this reaction at 1000 K? 12N2(g)+12O2(g)⇌NO(g)

The specific heat of hydrogen gas at constant pressure is CP​=3.4×103cal/kg∘C and at constant volume is CV​=2.4×103cal/kg∘C. If one kilogram hydrogen gas is heated from 10∘C to 20∘C at constant pressure, the external work done on the gas to maintain it at constant pressure is

Which of the following amine will give the carbylamine test?

If one mole of carbon atoms weighs 12 grams, what is the mass (in grams) of 1 atom of carbon?

What is the pH value of the solution containing 0.01MHCl and 0.001M NaOH?

In a cubic packed structure of mixed oxides, the lattice is made up of oxide ions, one fifth of tetrahedral voids are occupied by divalent X2+ ions, while one-half of the octahedral voids are occupied by trivalent ions Y3+, then the formula of the oxide is:

7. E not of Galvanic cell is 1.1 volt standard free change can be given as 1)-212.30 kilo joule per mole 2) -21.227 joule per mole 3)+ 21.227 kilo joule per mole 4)+ 21.227 volt

Why doesn't a glass slab refract white light like a glass prism?

Which has zero dipole moment

An exothermic reaction X→Y has an activation energy 30 kJ/mol. If energy change ΔE during the reaction is −20 kJ/mol, the activation energy for the reverse reaction in kJ/mol is ______.

Which of the following(s) will not show geometrical isomerism?

A photon was absorbed by a hydrogen atom and an electron was promoted to the 5th shell. When the excited electron returned to ground state, a visible photon and another quanta were emitted. Which transition is responsible for the emission of the other quanta?

Given, H2S(g)→HS(g)+H(g);△Hrxn=379.6 kJmol−1 H2 (g)+S (s)→H2S (g); △H∘fH2S=−21.1 kJmol−1 H2(g)→2H(g) ; ΔH=438 kJmol−1 ΔHsublimation of S = 280 kJmol−1 Thus, △H∘fHS is

The number of octahedral sites per sphere in F.C.C. structure is

why does the solubility of solid in liquid mixture increase with increase in temperature

Which element has the highest first IE?

Which of the following metal halide has the highest ionic character?(Here, M is monovalent metal)

Which one of the following alkenes when treated with HCl yields majorly an anti-Markovnikov product?

27 Reaction of 1,3dichlorocyclobutane with Na in dry ether

Find the number of formula units of FeSO4.7H2O present in 11 millimoles of FeSO4.7H2O.

How does terminal alkyne react with NaNH2 .what is the product formed

The spectrum produced by white light isOptions:Emission spectrum Continuous spectrumAbsorption spectrum Both emission and continuous spectrum

The dihedral angle between two methyl group in partially eclipsed conformation of n-butane is :

The distance between a compression and next rarefaction will be

Assertion Lithium sulphate does not form alums. Reason Li+ is too small to form a stable lattice required for double-salt/alum formation.

Grignard reaction with methyl amine

50. The vapour pressure of a solution containing 2gm of an electrolyte AB in 100gm water is 751mm at 100^° C . What is degree of dissociation of XY? (molar mass of XY=40)

The complete hydrolysis of XeF6 results in the formation of

142. The temperature of 5 moles of a gas at constantvolume is changed from 100^° C to 120^° C. Thecapacity of gas at constant volume will be (in joulelkelvin)(2) 8(4) 0.4(3) 0.8

Which conformation of glycol is the most acidic?

calculate the ratio of the radius of 1st orbit of H atom to that of 4th orbi

Compound (C) in the following scheme of reactions is: nBu−C≡CHLiNH2−−−−→(A)i) PhCHO−−−−−−→ii) H2O(B)MnO2−−−−→(C)

Atomic weight of Boron is 10.81 and it has 2 isotopes 5B10 and 5B11, then the ratio of 5B10:5B11 in nature would be 1. 15:16 2. 10:11 3. 19:81 4. 81:19

Rate constant for a nth order reaction has the dimensions(Where M is concentration unit)

if at moment t is equal to the seperation between the cars is 90m and length of each car is 5m the moment they will compleletely cross each other is

1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of the metal was formed. What is the equivalent weight of the metal?

Equal volumes of three acid solutions of pH 3, 4and 5 are mixed in a vessel. What will be theH+ ion concentration in the mixture?(1) 3.7 x 104 M(3) 1.11 x 103 M (4) 1.11 x 10-4 M(2) 3.7 x 10-3 M

Which of the following is a carbanion?

8. If phenol is treated with HCN,HCl and Aluminium chloride what will be the product?

21.A 300m long train is moving with a uniform velocity of 90 km/he.The time taken by train to cross a bridge of length 1700m is?

Percentage of ionization of different acid/base will vary in water, like-H2SO4>H2SO3 or HI>HCl. So there will be different concentration of H3O+ /OH- for different acid/base. Then why according to 'Levelling effect of water' all the acids/ base will have same strength in water?

what is ins†an teneous velocit

A sample of H2O2 solution labelled as "28 volume" has density of 265 g/L. Mark the correct option(s) representing concentration of same solution in other units:

What is equliliequi ?

Which of the following structures represent a cis form?

Ph-CH(CH_3)-CH_2-CH_3\xrightarrow[{hv}]{Cl_2}Products\xrightarrow[{distillation}]{Fractional}Fractions, No. of products and no. of fractions are respectively; (1)6,5 (2)6,4 (3)10,5 4)6,3

Which of the following will be having the highest bond enthalpy?

The specific heat of hydrogen gas at constant pressure is CP=3.4×103cal/kg∘C and at constant volume is CV=2.4×103cal/kg∘C. If one kilogram hydrogen gas is heated from 10∘C to 20∘C at constant pressure, the external work done on the gas to maintain it at constant pressure is