46295 + Interview Questions in Chemistry

1.	What is Kc for the following equilibrium when the equilibrium concentration of each substance is: [SO2]=0.60M,[O2]=0.82M and [SO3]=1.90M ? 2SO2+O2⇌2SO3
Answer» What is $K_{c}$ for the following equilibrium when the equilibrium concentration of each substance is: $[S O_{2}] = 0.60 M, [O_{2}] = 0.82 M$ and $[S O_{3}] = 1.90 M$ ? $2 S O_{2} + O_{2} ⇌ 2 S O_{3}$

Discussion

2.	Nitrogen is prepared by heating
Answer» Nitrogen is prepared by heating

Discussion

3.	Which of the following is true in case of reversible adiabatic expansion?
Answer» Which of the following is true in case of reversible adiabatic expansion?

Discussion

4.	What are conjugate acids and conjugate base
Answer» What are conjugate acids and conjugate base

Discussion

5.	Amongst the following antihistamines, which are antacids? (a) Ranitidine (b) Brompheniramine (c) Terfenadine (d) Cimetidine
Answer» Amongst the following antihistamines, which are antacids? (a) Ranitidine (b) Brompheniramine (c) Terfenadine (d) Cimetidine

Discussion

6.	Inert pair effect
Answer» Inert pair effect

Discussion

7.	How many π - electrons are there in the following structure?
Answer» How many $π$ - electrons are there in the following structure?

7.

How many π - electrons are there in the following structure?

Answer»

How many $π$ - electrons are there in the following structure?

Discussion

8.	Finkelstein reaction for the preparation of alkyl iodide is based upon the fact that
Answer» Finkelstein reaction for the preparation of alkyl iodide is based upon the fact that

Discussion

9.	The vapour pressure of acetone at 20∘C is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at 20∘C, its vapour pressure was 183 torr. The molar mass (gmol−1) of the substance is:
Answer» The vapour pressure of acetone at $20^{\circ} C$ is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at $20^{\circ} C$ , its vapour pressure was 183 torr. The molar mass $(g m o l^{- 1})$ of the substance is:

Discussion

10.	Ortho & para hydrogen differ in
Answer» Ortho & para hydrogen differ in

Discussion

11.	What is the difference between amu and atomic weight in grams for an element
Answer» What is the difference between amu and atomic weight in grams for an element

Discussion

12.	Which of the following is not true for electrolytic refining of Blister Copper?
Answer» Which of the following is not true for electrolytic refining of Blister Copper?

Discussion

13.	For which of the following standard enthalpy of formation is zero?
Answer» For which of the following standard enthalpy of formation is zero?

Discussion

14.	In molecular orbital theory the energy level change when we move from N2 to o2. Why?
Answer» In molecular orbital theory the energy level change when we move from N2 to o2. Why?

Discussion

15.	What is inert pair effect ?
Answer» What is inert pair effect ?

Discussion

16.	Which of the following is/are amphiprotic
Answer» Which of the following is/are amphiprotic

Discussion

17.	The dipole moment of NaCl molecule is 8.5 D and its bond length is 2.36 Ao. The percentage ionic character in this molecule will be
Answer» The dipole moment of $N a C l$ molecule is $8.5 D$ and its bond length is $2.36 A^{o}$ . The percentage ionic character in this molecule will be

Discussion

18.	An electric current is passed through an aqueous solution of lead(II) chloride. What are the half-reactions those takes place at the cathode and anode?
Answer» An electric current is passed through an aqueous solution of lead(II) chloride. What are the half-reactions those takes place at the cathode and anode?

Discussion

19.	Silica reacts with a hydride of superhalogen to form 'X'. On hydrolysis of 'X', another compound 'Y' is formed. 'Y' on heating at 1000∘C losses water to form 'Z'. 'Z' can also be prepared by the reaction
Answer» Silica reacts with a hydride of superhalogen to form 'X'. On hydrolysis of 'X', another compound 'Y' is formed. 'Y' on heating at $1000^{\circ} C$ losses water to form 'Z'. 'Z' can also be prepared by the reaction

Discussion

20.	Which of the following ores can be best concentrated by froth floatation process?
Answer» Which of the following ores can be best concentrated by froth floatation process?

Discussion

21.	Which of the following is Free radical substitution?
Answer» Which of the following is Free radical substitution?

Discussion

22.	The influence of permanent electrical dipole in dipole-Induced Dipole forces
Answer» The influence of permanent electrical dipole in dipole-Induced Dipole forces

Discussion

23.	20 mL of a 0.2 M Al2(SO4)3 solution is mixed with 20 mL of a 0.6 M BaCl2 solution. Determine the molarity of Al3+ ions in the solution.
Answer» $20 mL$ of a $0.2 M A l_{2} (S O_{4})_{3}$ solution is mixed with $20 mL$ of a $0.6 M B a C l_{2}$ solution. Determine the molarity of $A l^{3 +}$ ions in the solution.

Discussion

24.	Number of moles of hydroxide ions in 0.3L of 0.005M solution of Ba (OH)2 is:
Answer» Number of moles of hydroxide ions in 0.3L of 0.005M solution of Ba (OH)₂ is:

Discussion

25.	XeF4 on partial hydrolysis produces
Answer» $X e F_{4}$ on partial hydrolysis produces

Discussion

26.	Which of the following is the strongest conjugate base
Answer» Which of the following is the strongest conjugate base

26.

Which of the following is the strongest conjugate base

Answer»

Which of the following is the strongest conjugate base

Discussion

27.	Which among the following acid is called as Muriatic acid?
Answer» Which among the following acid is called as Muriatic acid?

Discussion

28.	On acidification of aqueous borax solution, it gives white flakes. This is due to formation of
Answer» On acidification of aqueous borax solution, it gives white flakes. This is due to formation of

Discussion

29.	A natural linear polymer of 2-methyl-1, 3-butadiene becomes hard on treatment with sulphur between 373 to 415 K and −s−s− bonds are formed between chains. Write the structure of the product of this treatment?
Answer» A natural linear polymer of 2-methyl-1, 3-butadiene becomes hard on treatment with sulphur between 373 to 415 K and $- s - s -$ bonds are formed between chains. Write the structure of the product of this treatment?

Discussion

30.	Dipole moment of HCl molecule is found to be 0.816 D. Assuming HCl bond length to be equal to 1 ∘A, then find the % ionic character of HCl molecule.
Answer» Dipole moment of $H C l$ molecule is found to be 0.816 D. Assuming $H C l$ bond length to be equal to 1 $\circ A$ , then find the % ionic character of HCl molecule.

Discussion

31.	The masses of two radioactive substance are same and their half lives are 1 hr and 2yr respectively. The ratio of their activities after 4yr will be:
Answer» The masses of two radioactive substance are same and their half lives are 1 hr and 2yr respectively. The ratio of their activities after 4yr will be:

Discussion

32.	The oxidation state of Cu and Fe in CuFeS2 are ___ and___respectively
Answer» The oxidation state of Cu and Fe in $C u F e S_{2}$ are ___ and___respectively

Discussion

33.	The number of α and β− emitted during the radioactive decay chain starting from 22688Ra and ending at 20682Pb is
Answer» The number of $α$ and $β^{-}$ emitted during the radioactive decay chain starting from $\begin{matrix} 22688 \end{matrix} R a$ and ending at $\begin{matrix} 20682 \end{matrix} P b$ is

Discussion

34.	What is band theory of metals?
Answer» What is band theory of metals?

Discussion

35.	Ground state electronic configuration of P atom can be represented as
Answer» Ground state electronic configuration of P atom can be represented as

Discussion

36.	A sp3 hybrid orbital contains 1/4 s-character or 2/3 s-character
Answer» A sp³ hybrid orbital contains 1/4 s-character or 2/3 s-character

36.

A sp3 hybrid orbital contains 1/4 s-character or 2/3 s-character

Answer»

A sp³ hybrid orbital contains

1/4 s-character or 2/3 s-character

Discussion

37.	The equilibrium constant of the reaction A2(g)+B2(g)⇌2AB(g) at 100∘C is 50. If one litre flask containing one mole of A2 is connected to a two litre flask containing two moles of B2 the number of moles of AB formed at 373 K will be -
Answer» The equilibrium constant of the reaction $A 2 (g) + B 2 (g) ⇌ 2 A B (g)$ at $100^{\circ} C$ is 50. If one litre flask containing one mole of $A_{2}$ is connected to a two litre flask containing two moles of $B_{2}$ the number of moles of AB formed at 373 K will be -

37.

The equilibrium constant of the reaction A2(g)+B2(g)⇌2AB(g) at 100∘C is 50. If one litre flask containing one mole of A2 is connected to a two litre flask containing two moles of B2 the number of moles of AB formed at 373 K will be -

Answer»

The equilibrium constant of the reaction $A 2 (g) + B 2 (g) ⇌ 2 A B (g)$ at $100^{\circ} C$ is 50.

If one litre flask containing one mole of $A_{2}$ is connected to a two litre flask containing two moles of $B_{2}$ the number of moles of AB formed at 373 K will be -

Discussion

38.	What is the molecular formula of nonane, octane and decane respectively?
Answer» What is the molecular formula of nonane, octane and decane respectively?

Discussion

39.	On heating Pb(NO3)2 a brown gas is evolved which undergoes dimerization on cooling. Identify the gas.
Answer» On heating $P b (N O_{3})_{2}$ a brown gas is evolved which undergoes dimerization on cooling. Identify the gas.

Discussion

40.	50 ml h20 is added to a 50 ml solution of Ba(OH)2 of strength 0.01M. The pH value of the resulting solution will be
Answer» 50 ml h20 is added to a 50 ml solution of Ba(OH)2 of strength 0.01M. The pH value of the resulting solution will be

Discussion

41.	The frequency of one of the lines in Paschen series of hydrogen atom is 2.750 ×1014 Hz. The quantum number which produces this transition is:
Answer» The frequency of one of the lines in Paschen series of hydrogen atom is $2.750 \times 10^{14}$ Hz. The quantum number which produces this transition is:

Discussion

42.	How much sulphur is present in an organic compound if 0.53g of the compound gave 1.158g of BaSO4 upon analysis?
Answer» How much sulphur is present in an organic compound if 0.53g of the compound gave 1.158g of $B a S O_{4}$ upon analysis?

Discussion

43.	The equation M+(x+y)NH3-->[M(NH3)x]++[e(NH3)y]- in this equation M is a alkali metal what is the meaning of x and y in the equation. I
Answer» The equation M+(x+y)NH3-->[M(NH3)x]⁺+[e(NH3)y]^- in this equation M is a alkali metal what is the meaning of x and y in the equation. I

Discussion

44.	Nylon-66 is not a
Answer» Nylon-66 is not a

Discussion

45.	The number of neutrons in a drop of water (20 drops= 1 mL) at 4∘C is __________.
Answer» The number of neutrons in a drop of water (20 drops= $1 mL$ ) at $4^{\circ} C$ is __________.

Discussion

46.	How are vacancy defects stoichiometric defects if some atoms are absent? Wouldn't that change the stoichiometry of the compound?
Answer» How are vacancy defects stoichiometric defects if some atoms are absent? Wouldn't that change the stoichiometry of the compound?

Discussion

47.	Find the total no. Of nucleons present in 12 g of C-12 atoms.
Answer» Find the total no. Of nucleons present in 12 g of C-12 atoms.

Discussion

48.	For an electron placed in the third orbit of the hydrogen atom, calculate the number of revolutions per second made by it around the nucleus.
Answer» For an electron placed in the third orbit of the hydrogen atom, calculate the number of revolutions per second made by it around the nucleus.

Discussion

49.	What will be the hardness of 105 grams water sample containing 16.2 grams of Ca(HCO3)2?
Answer» What will be the hardness of $10^{5}$ grams water sample containing 16.2 grams of Ca( ${H C O}_{3}$ ) $_{2}$ ?

Discussion

50.	The lanthanoid series starts with:
Answer» The lanthanoid series starts with:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is Kc for the following equilibrium when the equilibrium concentration of each substance is: [SO2]=0.60M,[O2]=0.82M and [SO3]=1.90M ? 2SO2+O2⇌2SO3

Nitrogen is prepared by heating

Which of the following is true in case of reversible adiabatic expansion?

What are conjugate acids and conjugate base

Amongst the following antihistamines, which are antacids? (a) Ranitidine (b) Brompheniramine (c) Terfenadine (d) Cimetidine

Inert pair effect

How many π - electrons are there in the following structure?

Finkelstein reaction for the preparation of alkyl iodide is based upon the fact that

The vapour pressure of acetone at 20∘C is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at 20∘C, its vapour pressure was 183 torr. The molar mass (gmol−1) of the substance is:

Ortho &amp; para hydrogen differ in

What is the difference between amu and atomic weight in grams for an element

Which of the following is not true for electrolytic refining of Blister Copper?

For which of the following standard enthalpy of formation is zero?

In molecular orbital theory the energy level change when we move from N2 to o2. Why?

What is inert pair effect ?

Which of the following is/are amphiprotic

The dipole moment of NaCl molecule is 8.5 D and its bond length is 2.36 Ao. The percentage ionic character in this molecule will be

An electric current is passed through an aqueous solution of lead(II) chloride. What are the half-reactions those takes place at the cathode and anode?

Silica reacts with a hydride of superhalogen to form 'X'. On hydrolysis of 'X', another compound 'Y' is formed. 'Y' on heating at 1000∘C losses water to form 'Z'. 'Z' can also be prepared by the reaction

Which of the following ores can be best concentrated by froth floatation process?

Which of the following is Free radical substitution?

The influence of permanent electrical dipole in dipole-Induced Dipole forces

20 mL of a 0.2 M Al2(SO4)3 solution is mixed with 20 mL of a 0.6 M BaCl2 solution. Determine the molarity of Al3+ ions in the solution.

Number of moles of hydroxide ions in 0.3L of 0.005M solution of Ba (OH)2 is:

XeF4 on partial hydrolysis produces

Which of the following is the strongest conjugate base

Which among the following acid is called as Muriatic acid?

On acidification of aqueous borax solution, it gives white flakes. This is due to formation of

A natural linear polymer of 2-methyl-1, 3-butadiene becomes hard on treatment with sulphur between 373 to 415 K and −s−s− bonds are formed between chains. Write the structure of the product of this treatment?

Dipole moment of HCl molecule is found to be 0.816 D. Assuming HCl bond length to be equal to 1 ∘A, then find the % ionic character of HCl molecule.

The masses of two radioactive substance are same and their half lives are 1 hr and 2yr respectively. The ratio of their activities after 4yr will be:

The oxidation state of Cu and Fe in CuFeS2 are ___ and___respectively

The number of α and β− emitted during the radioactive decay chain starting from 22688Ra and ending at 20682Pb is

What is band theory of metals?

Ground state electronic configuration of P atom can be represented as

A sp3 hybrid orbital contains 1/4 s-character or 2/3 s-character

The equilibrium constant of the reaction A2(g)+B2(g)⇌2AB(g) at 100∘C is 50. If one litre flask containing one mole of A2 is connected to a two litre flask containing two moles of B2 the number of moles of AB formed at 373 K will be -

What is the molecular formula of nonane, octane and decane respectively?

On heating Pb(NO3)2 a brown gas is evolved which undergoes dimerization on cooling. Identify the gas.

50 ml h20 is added to a 50 ml solution of Ba(OH)2 of strength 0.01M. The pH value of the resulting solution will be

The frequency of one of the lines in Paschen series of hydrogen atom is 2.750 ×1014 Hz. The quantum number which produces this transition is:

How much sulphur is present in an organic compound if 0.53g of the compound gave 1.158g of BaSO4 upon analysis?

The equation M+(x+y)NH3-->[M(NH3)x]++[e(NH3)y]- in this equation M is a alkali metal what is the meaning of x and y in the equation. I

Nylon-66 is not a

The number of neutrons in a drop of water (20 drops= 1 mL) at 4∘C is __________.

How are vacancy defects stoichiometric defects if some atoms are absent? Wouldn't that change the stoichiometry of the compound?

Find the total no. Of nucleons present in 12 g of C-12 atoms.

For an electron placed in the third orbit of the hydrogen atom, calculate the number of revolutions per second made by it around the nucleus.

What will be the hardness of 105 grams water sample containing 16.2 grams of Ca(HCO3)2?

The lanthanoid series starts with:

Ortho & para hydrogen differ in

The oxidation state of Cu and Fe in CuFeS2 are _ and_respectively