46295 + Interview Questions in Chemistry

1.	Potential energy of the electron at infinity is equal to
Answer» Potential energy of the electron at infinity is equal to

Discussion

2.	n-factor of Ba(MnO4)2 in acidic medium is:
Answer» n-factor of $B a (M n O_{4})_{2}$ in acidic medium is:

Discussion

3.	The best sequence of reaction to prepare 3 - chloro aniline from benzene is
Answer» The best sequence of reaction to prepare 3 - chloro aniline from benzene is

Discussion

4.	The solubility of Sr(OH)2 at 298 K is 19.23 g/L of solution. Calculate the concentrations of strontium and hydroxyl ions and the pH of the solution.
Answer» The solubility of $S r (O H)_{2}$ at 298 K is 19.23 g/L of solution. Calculate the concentrations of strontium and hydroxyl ions and the pH of the solution.

Discussion

5.	Question 43 Why is the vapour pressure of an aqueous solution of glucose lower than that of water?
Answer» Question 43 Why is the vapour pressure of an aqueous solution of glucose lower than that of water?

Discussion

6.	The high boiling point of water is due to:
Answer» The high boiling point of water is due to:

Discussion

7.	Double bond equivalent (degree of unsaturation) of (A) is :___
Answer» Double bond equivalent (degree of unsaturation) of (A) is :___

7.

Double bond equivalent (degree of unsaturation) of (A) is :___

Answer»

Double bond equivalent (degree of unsaturation) of (A) is :___

Discussion

8.	In wurtz reaction cycloalkylhalides are converted into bicyclic compounds but does the same happen for franklands reaction??
Answer» In wurtz reaction cycloalkylhalides are converted into bicyclic compounds but does the same happen for franklands reaction??

Discussion

9.	Give reason why a finely divided substance is more effective as an absorbent?
Answer» Give reason why a finely divided substance is more effective as an absorbent?

Discussion

10.	If pKb for the fluoride ion at 25∘C is 10.83 The ionization constant of hydrofluoric acid in water at this temperature will be: (Given:10−10.83=1.48×10−11)
Answer» If $p K_{b}$ for the fluoride ion at $25^{\circ} C$ is 10.83 The ionization constant of hydrofluoric acid in water at this temperature will be: $(G i v e n : 10^{- 10.83} = 1.48 \times 10^{- 11})$

Discussion

11.	Schemes 1 and 2 describe sequential transformation of alkynes M and N. Consider only the major products formed in each step for both schemes. The product X is -
Answer» Schemes 1 and 2 describe sequential transformation of alkynes M and N. Consider only the major products formed in each step for both schemes. The product X is -

Discussion

12.	Arrange the following groups in decreasing order according to their activating power
Answer» Arrange the following groups in decreasing order according to their activating power

Discussion

13.	Which of the following conformers for ethylene glycol is most stable?
Answer» Which of the following conformers for ethylene glycol is most stable?

Discussion

14.	Gaseous hydrogen contained initially under standard condition in a sealed vessel of volume 5 litre was cooled by ΔT=55 K. Find by how much the internal energy of the gas in joules will change. Answer the nearest multiple of 50
Answer» Gaseous hydrogen contained initially under standard condition in a sealed vessel of volume 5 litre was cooled by $Δ T = 55$ K. Find by how much the internal energy of the gas in joules will change. Answer the nearest multiple of 50

Discussion

15.	A nucleus X emits a beta particle to produce a nucleus Y. If their atomic masses are Mx and My respectively. The maximum energy of the beta particle emitted is (Hint: β− decay) (where me is the mass of an electron and c is the velocity of light)
Answer» A nucleus X emits a beta particle to produce a nucleus Y. If their atomic masses are $M_{x}$ and $M_{y}$ respectively. The maximum energy of the beta particle emitted is (Hint: $β^{-}$ decay) (where $m_{e}$ is the mass of an electron and c is the velocity of light)

15.

A nucleus X emits a beta particle to produce a nucleus Y. If their atomic masses are Mx and My respectively. The maximum energy of the beta particle emitted is (Hint: β− decay) (where me is the mass of an electron and c is the velocity of light)

Answer»

A nucleus X emits a beta particle to produce a nucleus Y. If their atomic masses are $M_{x}$ and $M_{y}$ respectively. The maximum energy of the beta particle emitted is (Hint: $β^{-}$ decay)

(where $m_{e}$ is the mass of an electron and c is the velocity of light)

Discussion

16.	An evacuated glass vessel weighs 50.0 g when empty 148.0 g when filled with a liquid of density 0.98 g mL−1 and 50.5 g when filled with an ideal gas at 760 mm Hg at 300 K, Determine the molar mass of the gas.
Answer» An evacuated glass vessel weighs $50.0 g$ when empty $148.0 g$ when filled with a liquid of density $0.98 g m L^{- 1}$ and $50.5 g$ when filled with an ideal gas at $760 m m H g$ at $300 K$ , Determine the molar mass of the gas.

Discussion

17.	Perlon is [AFMC 2001]
Answer» Perlon is [AFMC 2001]

17.

Perlon is [AFMC 2001]

Answer»

Perlon is [AFMC 2001]

Discussion

18.	The number of geometrical isomers that can be shown by a square planar complex of the type [M(abcd)] are:
Answer» The number of geometrical isomers that can be shown by a square planar complex of the type [M(abcd)] are:

Discussion

19.	Chemical theory of origin of life was given by
Answer» Chemical theory of origin of life was given by

Discussion

20.	The correct order of basicity of the following amines
Answer» The correct order of basicity of the following amines

Discussion

21.	How many coulombs of electricity are required for the oxidation of 1 mole of H2O to O2?
Answer» How many coulombs of electricity are required for the oxidation of 1 mole of $H_{2} O$ to $O_{2}$ ?

Discussion

22.	The IUPAC name of
Answer» The IUPAC name of

22.

The IUPAC name of

Answer»

The IUPAC name of

Discussion

23.	When an ideal gas undergoes free expansion, no cooling occurs since the molecules
Answer» When an ideal gas undergoes free expansion, no cooling occurs since the molecules

Discussion

24.	Methyl acetate & propionic acid are
Answer» Methyl acetate & propionic acid are

Discussion

25.	An unknown compound ( A) has a molecular formula C4 H6. When (A) is treated with excess of Br2 a new substance (B) with formula C4H6 Br4 is formed. (A) forms a white ppt. with ammoniacal silver nitrate. Compound A is
Answer» An unknown compound ( A) has a molecular formula C₄ H₆.When (A) is treated with excess of Br₂ a new substance (B) with formula C₄H₆ Br₄ is formed. (A) forms a white ppt. with ammoniacal silver nitrate. Compound A is

25.

An unknown compound ( A) has a molecular formula C4 H6. When (A) is treated with excess of Br2 a new substance (B) with formula C4H6 Br4 is formed. (A) forms a white ppt. with ammoniacal silver nitrate. Compound A is

Answer»

An unknown compound ( A) has a molecular formula C₄ H₆.When (A) is treated with excess of Br₂ a new substance (B) with formula C₄H₆ Br₄ is formed. (A) forms a white ppt. with ammoniacal silver nitrate. Compound A is

Discussion

26.	Why the sky appears black when the rain comes is there any substance present in the rainy cloud. if it is a dust then why it returns to the earth when rain Falls please answer me
Answer» Why the sky appears black when the rain comes is there any substance present in the rainy cloud. if it is a dust then why it returns to the earth when rain Falls please answer me

Discussion

27.	Which one of the following oxides of nitrogen is a coloured gas ?
Answer» Which one of the following oxides of nitrogen is a coloured gas ?

Discussion

28.	The first IE of Na, Mg and Si are respectively 496, 737, 786 KJ/mol. The IE of Al will be closer to A) 760 KJ/mol. B) 575 KJ/mol. C) 801 KJ/mol. D) 419 KJ/mol. Explain in detail.
Answer» The first IE of Na, Mg and Si are respectively 496, 737, 786 KJ/mol. The IE of Al will be closer to A) 760 KJ/mol. B) 575 KJ/mol. C) 801 KJ/mol. D) 419 KJ/mol. Explain in detail.

28.

The first IE of Na, Mg and Si are respectively 496, 737, 786 KJ/mol. The IE of Al will be closer to A) 760 KJ/mol. B) 575 KJ/mol. C) 801 KJ/mol. D) 419 KJ/mol. Explain in detail.

Answer»

The first IE of Na, Mg and Si are respectively 496, 737, 786 KJ/mol. The IE of Al will be closer to

A) 760 KJ/mol. B) 575 KJ/mol. C) 801 KJ/mol. D) 419 KJ/mol.

Explain in detail.

Discussion

29.	An aqueous solution of CoCl3.6NH3 on mixing with AgNO3 produces 3 moles of a white precipitate. Primary and secondary valency of the metal in this complex is:
Answer» An aqueous solution of $C o C l_{3} . 6 N H_{3}$ on mixing with $A g N O_{3}$ produces $3$ moles of a white precipitate. Primary and secondary valency of the metal in this complex is:

Discussion

30.	Conjugate acid of HF is
Answer» Conjugate acid of $H F$ is

Discussion

31.	Among the following compounds, the one which does not produce nitrogen gas upon heating is:
Answer» Among the following compounds, the one which does not produce nitrogen gas upon heating is:

Discussion

32.	An isomer of ethanol is:
Answer» An isomer of ethanol is:

Discussion

33.	Which of the following is true regarding diamagnetic substance?
Answer» Which of the following is true regarding diamagnetic substance?

Discussion

34.	A semipermeable membrane allows the diffusion of
Answer» A semipermeable membrane allows the diffusion of

Discussion

35.	A photon of energy 70 eV collides with He+ ion. Due to this collision, He+atom gets ionized. The maximum kinetic energy of the emitted electron is
Answer» A photon of energy $70 e V$ collides with $H e^{+}$ ion. Due to this collision, $H e^{+}$ atom gets ionized. The maximum kinetic energy of the emitted electron is

Discussion

36.	For the equilibrium LiCl.3NH3(s)⇌LiCl.NH3(s)+2NH3(g); Kp=9 atm2 at 37∘C. A 5 L vessel contains 0.1 mole of LiCl.NH3. How many moles of NH3 should be added to the flask at this tremperature to derive the backward reaction for completion? Use : R=0.082 atm L/mol K
Answer» For the equilibrium $L i C l . 3 N H_{3} (s) ⇌ L i C l . N H_{3} (s) + 2 N H_{3} (g);$ $K_{p} = 9 a t m^{2}$ at $37^{\circ} C .$ A $5 L$ vessel contains $0.1$ mole of $L i C l . N H_{3}$ . How many moles of $N H_{3}$ should be added to the flask at this tremperature to derive the backward reaction for completion? Use : $R = 0.082 a t m L / m o l K$

Discussion

37.	The correct order of stability of hydrides of alkali metals is:
Answer» The correct order of stability of hydrides of alkali metals is:

Discussion

38.	The correct order of basicity in aqueous media is:
Answer» The correct order of basicity in aqueous media is:

Discussion

39.	The component present in greater proportion in water gas is
Answer» The component present in greater proportion in water gas is

Discussion

40.	How many oxygen atoms are present in 50g of CaCo3 ?
Answer» How many oxygen atoms are present in 50g of $C a C o_{3}$ ?

Discussion

41.	When ice-cubes are pressed together, they fuse because of _____
Answer» When ice-cubes are pressed together, they fuse because of _____

Discussion

42.	Work function of certain metals are listed below.the no. of metals which will show photoelectric effect when light of 300nm wavelength falls on the metal is ____ (integer) metal work function (eV) li 2.4 Na 2.3 k 2.2 Mg 3.7 Cu 4.8 Ag 4.3 Fe 4.7 Pt 6.3 W 4.75
Answer» Work function of certain metals are listed below.the no. of metals which will show photoelectric effect when light of 300nm wavelength falls on the metal is ____ (integer) metal work function (eV) li 2.4 Na 2.3 k 2.2 Mg 3.7 Cu 4.8 Ag 4.3 Fe 4.7 Pt 6.3 W 4.75

Discussion

43.	Which of the following represent p-orbital?
Answer» Which of the following represent p-orbital?

Discussion

44.	Explaine lux_flood concept of acid and base with example
Answer» Explaine lux_flood concept of acid and base with example

Discussion

45.	n the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the coreect answer out of the following choices. (a) Both assertion and reason are true and reason is the coreect explanation of assertion. (b) Both assertion and reason are true but reason is not the correct explanation of assertion. (c) Assertion is true but reason is false. (d) Assertion is false but reason is true. (e) Assertion and reason both are wrong. Assertion (A) Hydrometallurgy involves dissolving the ore in a stuitable reagent followed by precipitation by a more electropositive metal Reason (R) Copper is extracted by hydropetallurgy.
Answer» n the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the coreect answer out of the following choices. (a) Both assertion and reason are true and reason is the coreect explanation of assertion. (b) Both assertion and reason are true but reason is not the correct explanation of assertion. (c) Assertion is true but reason is false. (d) Assertion is false but reason is true. (e) Assertion and reason both are wrong. Assertion (A) Hydrometallurgy involves dissolving the ore in a stuitable reagent followed by precipitation by a more electropositive metal Reason (R) Copper is extracted by hydropetallurgy.

Discussion

46.	(a) For a reaction A+B→P,the rate is given by Rate = k[A][B]2 (i) How is the rate of reaction affected if the concentration of B is doubled? (ii) What is the overall order of reaction if A is present in large excess? (b) A first order reaction takes 23.1 minutes for 50% completion. Calculate the time required for 75% completion of this reaction. (log 2 =0.301, log 3 =0.4771, log 4 =0.6021)
Answer» (a) For a reaction $A + B \to P$ ,the rate is given by Rate = $k [A] [B]^{2}$ (i) How is the rate of reaction affected if the concentration of B is doubled? (ii) What is the overall order of reaction if A is present in large excess? (b) A first order reaction takes 23.1 minutes for 50% completion. Calculate the time required for 75% completion of this reaction. (log 2 =0.301, log 3 =0.4771, log 4 =0.6021)

Discussion

47.	Why is calcium preferred over sodium to remove last traces of moisture from alcohol
Answer» Why is calcium preferred over sodium to remove last traces of moisture from alcohol

Discussion

48.	Write the IUPAC name of the following :
Answer» Write the IUPAC name of the following :

Discussion

49.	Why do Li+ (aq) have bigger size?
Answer» Why do Li⁺ (aq) have bigger size?

Discussion

50.	A cycloalkane having vapour density 35 gives single monochlorinated product upon chlorination. The number of hydrogen present in the cycloalkane is:
Answer» A cycloalkane having vapour density $35$ gives single monochlorinated product upon chlorination. The number of hydrogen present in the cycloalkane is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Potential energy of the electron at infinity is equal to

n-factor of Ba(MnO4)2 in acidic medium is:

The best sequence of reaction to prepare 3 - chloro aniline from benzene is

The solubility of Sr(OH)2 at 298 K is 19.23 g/L of solution. Calculate the concentrations of strontium and hydroxyl ions and the pH of the solution.

Question 43 Why is the vapour pressure of an aqueous solution of glucose lower than that of water?

The high boiling point of water is due to:

Double bond equivalent (degree of unsaturation) of (A) is :___

In wurtz reaction cycloalkylhalides are converted into bicyclic compounds but does the same happen for franklands reaction??

Give reason why a finely divided substance is more effective as an absorbent?

If pKb for the fluoride ion at 25∘C is 10.83 The ionization constant of hydrofluoric acid in water at this temperature will be: (Given:10−10.83=1.48×10−11)

Schemes 1 and 2 describe sequential transformation of alkynes M and N. Consider only the major products formed in each step for both schemes. The product X is -

Arrange the following groups in decreasing order according to their activating power

Which of the following conformers for ethylene glycol is most stable?

Gaseous hydrogen contained initially under standard condition in a sealed vessel of volume 5 litre was cooled by ΔT=55 K. Find by how much the internal energy of the gas in joules will change. Answer the nearest multiple of 50

A nucleus X emits a beta particle to produce a nucleus Y. If their atomic masses are Mx and My respectively. The maximum energy of the beta particle emitted is (Hint: β− decay) (where me is the mass of an electron and c is the velocity of light)

An evacuated glass vessel weighs 50.0 g when empty 148.0 g when filled with a liquid of density 0.98 g mL−1 and 50.5 g when filled with an ideal gas at 760 mm Hg at 300 K, Determine the molar mass of the gas.

Perlon is [AFMC 2001]

The number of geometrical isomers that can be shown by a square planar complex of the type [M(abcd)] are:

Chemical theory of origin of life was given by

The correct order of basicity of the following amines

How many coulombs of electricity are required for the oxidation of 1 mole of H2O to O2?

The IUPAC name of

When an ideal gas undergoes free expansion, no cooling occurs since the molecules

Methyl acetate &amp; propionic acid are

An unknown compound ( A) has a molecular formula C4 H6. When (A) is treated with excess of Br2 a new substance (B) with formula C4H6 Br4 is formed. (A) forms a white ppt. with ammoniacal silver nitrate. Compound A is

Why the sky appears black when the rain comes is there any substance present in the rainy cloud. if it is a dust then why it returns to the earth when rain Falls please answer me

Which one of the following oxides of nitrogen is a coloured gas ?

The first IE of Na, Mg and Si are respectively 496, 737, 786 KJ/mol. The IE of Al will be closer to A) 760 KJ/mol. B) 575 KJ/mol. C) 801 KJ/mol. D) 419 KJ/mol. Explain in detail.

An aqueous solution of CoCl3.6NH3 on mixing with AgNO3 produces 3 moles of a white precipitate. Primary and secondary valency of the metal in this complex is:

Conjugate acid of HF is

Among the following compounds, the one which does not produce nitrogen gas upon heating is:

An isomer of ethanol is:

Which of the following is true regarding diamagnetic substance?

A semipermeable membrane allows the diffusion of

A photon of energy 70 eV collides with He+ ion. Due to this collision, He+atom gets ionized. The maximum kinetic energy of the emitted electron is

For the equilibrium LiCl.3NH3(s)⇌LiCl.NH3(s)+2NH3(g); Kp=9 atm2 at 37∘C. A 5 L vessel contains 0.1 mole of LiCl.NH3. How many moles of NH3 should be added to the flask at this tremperature to derive the backward reaction for completion? Use : R=0.082 atm L/mol K

The correct order of stability of hydrides of alkali metals is:

The correct order of basicity in aqueous media is:

The component present in greater proportion in water gas is

How many oxygen atoms are present in 50g of CaCo3 ?

When ice-cubes are pressed together, they fuse because of _____

Work function of certain metals are listed below.the no. of metals which will show photoelectric effect when light of 300nm wavelength falls on the metal is ____ (integer) metal work function (eV) li 2.4 Na 2.3 k 2.2 Mg 3.7 Cu 4.8 Ag 4.3 Fe 4.7 Pt 6.3 W 4.75

Which of the following represent p-orbital?

Explaine lux_flood concept of acid and base with example

Why is calcium preferred over sodium to remove last traces of moisture from alcohol

Write the IUPAC name of the following :

Why do Li+ (aq) have bigger size?

A cycloalkane having vapour density 35 gives single monochlorinated product upon chlorination. The number of hydrogen present in the cycloalkane is:

Methyl acetate & propionic acid are