46295 + Interview Questions in Chemistry

1.	fire caused by sodium cannot be extinguish by water
Answer» fire caused by sodium cannot be extinguish by water

Discussion

2.	The degree of hydrolysis in hydraulic equilibrium, A−(aq)+H2O(l)⇌HA(aq)+OH−(aq) at salt concentration 0.0001 M is: (Ka=1.0×10−6) (Multiply your answer by 100)
Answer» The degree of hydrolysis in hydraulic equilibrium, $A^{-} (a q) + H_{2} O (l) ⇌ H A (a q) + O H^{-} (a q)$ at salt concentration $0.0001 M$ is: ( $K_{a} = 1.0 \times 10^{- 6})$ (Multiply your answer by $100$ )

Discussion

3.	What is the order of +I effect (inductive effect) for the following 1.Phenyl 2.Methyl 3.Ethyl 4.n propyl5.iso propyl and why?
Answer» What is the order of +I effect (inductive effect) for the following 1.Phenyl 2.Methyl 3.Ethyl 4.n propyl 5.iso propyl and why?

Discussion

4.	Is the Newlands octaves also seen in the modern periodic table
Answer» Is the Newlands octaves also seen in the modern periodic table

Discussion

5.	The radius of the Bohr orbit in the ground state of hydrogen atom is 0.5 ˚A. The radius of the orbit of the electron in the third excited state of He will be,
Answer» The radius of the Bohr orbit in the ground state of hydrogen atom is $0.5 ˚ A$ . The radius of the orbit of the electron in the third excited state of $H e$ will be,

Discussion

6.	The number of waves in the third orbit of h atom is
Answer» The number of waves in the third orbit of h atom is

Discussion

7.	The density of liquid (mol. wt. = 70) is 1.2 g mL−1. If 2 mL of liquid contains 35 drops, the number of molecules of liquid in one drop is
Answer» The density of liquid (mol. wt. = 70) is 1.2 g mL $^{- 1}$ . If 2 mL of liquid contains 35 drops, the number of molecules of liquid in one drop is

Discussion

8.	The total number of electrons in 4.2g of N3- ion is:
Answer» The total number of electrons in 4.2g of N3- ion is:

Discussion

9.	22.Bromobenzene from iodobenzene
Answer» 22.Bromobenzene from iodobenzene

Discussion

10.	54.How to determine no. Of unpaired electron in [Sc(H2o)6](+3)
Answer» 54.How to determine no. Of unpaired electron in [Sc(H2o)6](+3)

Discussion

11.	Does ∆H become more and more negative during process of adsorption
Answer» Does ∆H become more and more negative during process of adsorption

Discussion

12.	Molecule having maximum number of lone pairs of electrons on central atom is
Answer» Molecule having maximum number of lone pairs of electrons on central atom is

Discussion

13.	The trichloromethyl group is meta directing when attached to benzene ring due to 1)hyperconjugation 2)reverse hyperconjugation3) +I effect4) -I effect
Answer» The trichloromethyl group is meta directing when attached to benzene ring due to 1)hyperconjugation 2)reverse hyperconjugation 3) +I effect 4) -I effect

13.

The trichloromethyl group is meta directing when attached to benzene ring due to 1)hyperconjugation 2)reverse hyperconjugation3) +I effect4) -I effect

Answer»

The trichloromethyl group is meta directing when attached to benzene ring due to 1)hyperconjugation

2)reverse hyperconjugation

3) +I effect

4) -I effect

Discussion

14.	12 gram of gaseous mixture of helium and methane was taken in container at pressure p and 8 gram of oxygen was added at same temperature now the pressure becomes 7p/6 what is the composition of helium and methane in the mixture.
Answer» 12 gram of gaseous mixture of helium and methane was taken in container at pressure p and 8 gram of oxygen was added at same temperature now the pressure becomes 7p/6 what is the composition of helium and methane in the mixture.

Discussion

15.	What does mean by LCAO mathod ?
Answer» What does mean by LCAO mathod ?

Discussion

16.	5A→ ProductIn above reaction, half-life period is directly proportional to initial concentration of reactant. The initial rate of reaction is 400 mol L−1 min−1Then the order of reaction:
Answer» $5 A \to$ Product In above reaction, half-life period is directly proportional to initial concentration of reactant. The initial rate of reaction is $400 {mol L}^{- 1} {min}^{- 1}$ Then the order of reaction:

Discussion

17.	Assertion:Coordination no. of both Na^+ and Cl^- in Nacl is 6. Reason:Second coordination no. of Cl^- in the Nacl unit is 12
Answer» Assertion:Coordination no. of both Na^+ and Cl^- in Nacl is 6. Reason:Second coordination no. of Cl^- in the Nacl unit is 12

Discussion

18.	Which of the following mentioned positions in the given compound is more reactive towards electrophilic substitutions?___
Answer» Which of the following mentioned positions in the given compound is more reactive towards electrophilic substitutions?___

18.

Which of the following mentioned positions in the given compound is more reactive towards electrophilic substitutions?___

Answer»

Which of the following mentioned positions in the given compound is more reactive towards electrophilic substitutions?___

Discussion

19.	hydrated MgCl_{2 } associates with:- 1)6 H2O 2)8H2O 3)both 4)non
Answer» hydrated MgCl_{2 } associates with:- 1)6 H2O 2)8H2O 3)both 4)non

Discussion

20.	_______ is the site for glycolysis in the cell.
Answer» _______ is the site for glycolysis in the cell.

Discussion

21.	The van't Hoff factor for 0.1 M,Ba(NO3)2 solution is 2.74. The degree of dissociation is:
Answer» The van't Hoff factor for $0.1 M, B a (N O_{3})_{2}$ solution is $2.74$ . The degree of dissociation is:

Discussion

22.	how to calculate no. of coordinate bonds in a compound like how dos so3 have 2 coordinate bonds?
Answer» how to calculate no. of coordinate bonds in a compound like how dos so3 have 2 coordinate bonds?

Discussion

23.	71. 100 ml of 0.5M H2SO4 is mixed with 50ml of 0.1N Ca(OH)2. The final solution is a) acidic 19/30N b) basic 19/30 N c) acidic 1/15 N d) basic 1/30 N
Answer» 71. 100 ml of 0.5M H2SO4 is mixed with 50ml of 0.1N Ca(OH)2. The final solution is a) acidic 19/30N b) basic 19/30 N c) acidic 1/15 N d) basic 1/30 N

Discussion

24.	A sample of 0.50 g ofan organic compound was treated according to Kjeldahl’s method.The ammonia evolved was absorbed in 50 mL of 0.5 M H2SO4.The residual acid required 60 mL of 0.5 M solution of NaOH forneutralisation. Find the percentage composition of nitrogen in thecompound.
Answer» A sample of 0.50 g of an organic compound was treated according to Kjeldahl’s method. The ammonia evolved was absorbed in 50 mL of 0.5 M H₂SO₄. The residual acid required 60 mL of 0.5 M solution of NaOH for neutralisation. Find the percentage composition of nitrogen in the compound.

Discussion

25.	33. If the half time of zero order reaction is 30 minutes.Then how much time required for complete reaction?
Answer» 33. If the half time of zero order reaction is 30 minutes.Then how much time required for complete reaction?

Discussion

26.	The number of moles in 3.00 g of boron tribromide BBr3 is 'x' ×10−2. 'x' is :
Answer» The number of moles in 3.00 g of boron tribromide $B B r_{3}$ is 'x' $\times 10^{- 2}$ . 'x' is :

Discussion

27.	Which of the following compounds undergoes dehydrochlorination most easily when treated with alcoholic KOH ?
Answer» Which of the following compounds undergoes dehydrochlorination most easily when treated with alcoholic $K O H$ ?

Discussion

28.	Why funnel arrangent is necessary in the laboratory preparation of hydrochloric acid?
Answer» Why funnel arrangent is necessary in the laboratory preparation of hydrochloric acid?

Discussion

29.	What is cyclotorn
Answer» What is cyclotorn

Discussion

30.	Which one of the following is a second order reaction?
Answer» Which one of the following is a second order reaction?

Discussion

31.	(a) Give reasons for the following :(i) Sulphur in vapour state shows paramagnetic behaviour.ii) N-Nbond is weaker than P-P bond.(iii) Ozone is thermodynamically less stable than oxygen.(b) Write the name of gas released when Cu is added to (i) dilute HNO3 and (ii) conc. HNO3
Answer» (a) Give reasons for the following : (i) Sulphur in vapour state shows paramagnetic behaviour. ii) N-Nbond is weaker than P-P bond. (iii) Ozone is thermodynamically less stable than oxygen. (b) Write the name of gas released when Cu is added to (i) dilute $H N O_{3}$ and (ii) conc. $H N O_{3}$

Discussion

32.	How g varies with depth?
Answer» How g varies with depth?

Discussion

33.	Both geometrical and optical isomersim are shown by
Answer» Both geometrical and optical isomersim are shown by

Discussion

34.	19. When does water acts as a strong field ligand and when as a weak field ligand?
Answer» 19. When does water acts as a strong field ligand and when as a weak field ligand?

Discussion

35.	How many moles of nitric acid are required to convert 1 mol of sulfur to sulfuric acid?
Answer» How many moles of nitric acid are required to convert $1 m o l$ of sulfur to sulfuric acid?

Discussion

36.	what will be the molality of chloroform in water sample which contains 15ppm chloroform by mass
Answer» what will be the molality of chloroform in water sample which contains 15ppm chloroform by mass

Discussion

37.	The monomer of the given polymer can be:
Answer» The monomer of the given polymer can be:

Discussion

38.	In a solid AB having the NaCl structure, A atoms occupy the corners of the cubic unit cell. If all the face centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is (A) AB2. (B) A2B. (C) A4B3. (D) A3B4
Answer» In a solid AB having the NaCl structure, A atoms occupy the corners of the cubic unit cell. If all the face centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is (A) AB_2.(B) A₂B. (C) A₄B_3.(D) A₃B₄

Discussion

39.	46.Find max no of electron belongs to n= 3 M= 0
Answer» 46.Find max no of electron belongs to n= 3 M= 0

Discussion

40.	Packing fraction in a hexagonal arrangement is:
Answer» Packing fraction in a hexagonal arrangement is:

Discussion

41.	Estimation by 'Flame photometry' is not helpful in the case of
Answer» Estimation by 'Flame photometry' is not helpful in the case of

Discussion

42.	Electrons are accelerated by voltage V0, initially electrons were at rest, speed after covering distance x is
Answer» Electrons are accelerated by voltage $V_{0},$ initially electrons were at rest, speed after covering distance x is

Discussion

43.	Discuss briefly the physical and chemical properties of ethanoic acid.
Answer» Discuss briefly the physical and chemical properties of ethanoic acid.

Discussion

44.	Two gases A and B having the same volume diffuse through a porous partition in 20 and 10 seconds respectively. The molecular mass of A is 49 u. Molecular mass of B will be:
Answer» Two gases $A$ and $B$ having the same volume diffuse through a porous partition in $20$ and $10$ seconds respectively. The molecular mass of $A$ is $49 u$ . Molecular mass of $B$ will be:

Discussion

45.	WHICH ELEMENT HAVE HIGHEST ELECTRON AFFINITY
Answer» WHICH ELEMENT HAVE HIGHEST ELECTRON AFFINITY

Discussion

46.	What is anomeric carbon atom
Answer» What is anomeric carbon atom

Discussion

47.	Medating particle of graviational force
Answer» Medating particle of graviational force

Discussion

48.	How more lattice energy causes less solubility ?
Answer» How more lattice energy causes less solubility ?

Discussion

49.	What happens when phenol reacts with mercury
Answer» What happens when phenol reacts with mercury

Discussion

50.	Four diatomic species are listed below. Identify the correct order of increasing bond order:
Answer» Four diatomic species are listed below. Identify the correct order of increasing bond order:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

fire caused by sodium cannot be extinguish by water

The degree of hydrolysis in hydraulic equilibrium, A−(aq)+H2O(l)⇌HA(aq)+OH−(aq) at salt concentration 0.0001 M is: (Ka=1.0×10−6) (Multiply your answer by 100)

What is the order of +I effect (inductive effect) for the following 1.Phenyl 2.Methyl 3.Ethyl 4.n propyl5.iso propyl and why?

Is the Newlands octaves also seen in the modern periodic table

The radius of the Bohr orbit in the ground state of hydrogen atom is 0.5 ˚A. The radius of the orbit of the electron in the third excited state of He will be,

The number of waves in the third orbit of h atom is

The density of liquid (mol. wt. = 70) is 1.2 g mL−1. If 2 mL of liquid contains 35 drops, the number of molecules of liquid in one drop is

The total number of electrons in 4.2g of N3- ion is:

22.Bromobenzene from iodobenzene

54.How to determine no. Of unpaired electron in [Sc(H2o)6](+3)

Does ∆H become more and more negative during process of adsorption

Molecule having maximum number of lone pairs of electrons on central atom is

The trichloromethyl group is meta directing when attached to benzene ring due to 1)hyperconjugation 2)reverse hyperconjugation3) +I effect4) -I effect

12 gram of gaseous mixture of helium and methane was taken in container at pressure p and 8 gram of oxygen was added at same temperature now the pressure becomes 7p/6 what is the composition of helium and methane in the mixture.

What does mean by LCAO mathod ?

5A→ ProductIn above reaction, half-life period is directly proportional to initial concentration of reactant. The initial rate of reaction is 400 mol L−1 min−1Then the order of reaction:

Assertion:Coordination no. of both Na^+ and Cl^- in Nacl is 6. Reason:Second coordination no. of Cl^- in the Nacl unit is 12

Which of the following mentioned positions in the given compound is more reactive towards electrophilic substitutions?___

hydrated MgCl_{2 } associates with:- 1)6 H2O 2)8H2O 3)both 4)non

_______ is the site for glycolysis in the cell.

The van't Hoff factor for 0.1 M,Ba(NO3)2 solution is 2.74. The degree of dissociation is:

how to calculate no. of coordinate bonds in a compound like how dos so3 have 2 coordinate bonds?

71. 100 ml of 0.5M H2SO4 is mixed with 50ml of 0.1N Ca(OH)2. The final solution is a) acidic 19/30N b) basic 19/30 N c) acidic 1/15 N d) basic 1/30 N

A sample of 0.50 g ofan organic compound was treated according to Kjeldahl’s method.The ammonia evolved was absorbed in 50 mL of 0.5 M H2SO4.The residual acid required 60 mL of 0.5 M solution of NaOH forneutralisation. Find the percentage composition of nitrogen in thecompound.

33. If the half time of zero order reaction is 30 minutes.Then how much time required for complete reaction?

The number of moles in 3.00 g of boron tribromide BBr3 is 'x' ×10−2. 'x' is :

Which of the following compounds undergoes dehydrochlorination most easily when treated with alcoholic KOH ?

Why funnel arrangent is necessary in the laboratory preparation of hydrochloric acid?

What is cyclotorn

Which one of the following is a second order reaction?

(a) Give reasons for the following :(i) Sulphur in vapour state shows paramagnetic behaviour.ii) N-Nbond is weaker than P-P bond.(iii) Ozone is thermodynamically less stable than oxygen.(b) Write the name of gas released when Cu is added to (i) dilute HNO3 and (ii) conc. HNO3

How g varies with depth?

Both geometrical and optical isomersim are shown by

19. When does water acts as a strong field ligand and when as a weak field ligand?

How many moles of nitric acid are required to convert 1 mol of sulfur to sulfuric acid?

what will be the molality of chloroform in water sample which contains 15ppm chloroform by mass

The monomer of the given polymer can be:

In a solid AB having the NaCl structure, A atoms occupy the corners of the cubic unit cell. If all the face centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is (A) AB2. (B) A2B. (C) A4B3. (D) A3B4

46.Find max no of electron belongs to n= 3 M= 0

Packing fraction in a hexagonal arrangement is:

Estimation by 'Flame photometry' is not helpful in the case of

Electrons are accelerated by voltage V0, initially electrons were at rest, speed after covering distance x is

Discuss briefly the physical and chemical properties of ethanoic acid.

Two gases A and B having the same volume diffuse through a porous partition in 20 and 10 seconds respectively. The molecular mass of A is 49 u. Molecular mass of B will be:

WHICH ELEMENT HAVE HIGHEST ELECTRON AFFINITY

What is anomeric carbon atom

Medating particle of graviational force

How more lattice energy causes less solubility ?

What happens when phenol reacts with mercury

Four diatomic species are listed below. Identify the correct order of increasing bond order: