46295 + Interview Questions in Chemistry

1.	Considering the given reaction, the major product among the following is:
Answer» Considering the given reaction, the major product among the following is:

Discussion

2.	why pent-4-yn-1ene is not resonance stabilised?
Answer» why pent-4-yn-1ene is not resonance stabilised?

Discussion

3.	An electron of mass me and a proton of mass mp are moving with the same speed. The ratio of their de-Brogile wave length (λeλp) is
Answer» An electron of mass m_e and a proton of mass $m_{p}$ are moving with the same speed. The ratio of their de-Brogile wave length $(\frac{λ_{e}}{λ_{p}})$ is

Discussion

4.	Ni(CO)4 is high spin complex or low spin complex ? It is tetrahedral molecule so it should be high spin complex ( as tetrahedral complex are always high spin )
Answer» Ni(CO)4 is high spin complex or low spin complex ? It is tetrahedral molecule so it should be high spin complex ( as tetrahedral complex are always high spin )

Discussion

5.	Which of the following fischer projections is different from the other three?
Answer» Which of the following fischer projections is different from the other three?

Discussion

6.	Steel is not a pure form of iron. What does it consist of? What is the advantage of adding another substance to iron?
Answer» Steel is not a pure form of iron. What does it consist of? What is the advantage of adding another substance to iron?

Discussion

7.	the types of bond present in NH4Cl are1) Electrovalent,covelent and coordinate2)Only Ionic3)Only covalent 4)Covalent and coordinate
Answer» the types of bond present in NH4Cl are 1) Electrovalent,covelent and coordinate 2)Only Ionic 3)Only covalent 4)Covalent and coordinate

Discussion

8.	How do you write electronic configuration for compound like CN by molecular orbital theory? If it is to be written for a diatomic molecule like H2 then we have to consider electronic configuration of H but for a compound like CN should we consider E.C. of C or N or both? Could you generalize how to write E.C. for compounds by MOT?
Answer» How do you write electronic configuration for compound like CN by molecular orbital theory? If it is to be written for a diatomic molecule like $H_{2}$ then we have to consider electronic configuration of H but for a compound like CN should we consider E.C. of C or N or both? Could you generalize how to write E.C. for compounds by MOT?

Discussion

9.	While separating a mixture of ortho and para nitrophenols by steam distillation, name the isomer which will be steam volatile. Give reason.
Answer» While separating a mixture of ortho and para nitrophenols by steam distillation, name the isomer which will be steam volatile. Give reason.

Discussion

10.	which is more basic so42- or nh2- and why
Answer» which is more basic so42- or nh2- and why

Discussion

11.	Each of the compounds shown below has two aromatic rings, labelled as A and B. Identify the number of compounds in which ring B is more active than ring A for electrophilic aromatic substitution reaction ___
Answer» Each of the compounds shown below has two aromatic rings, labelled as A and B. Identify the number of compounds in which ring B is more active than ring A for electrophilic aromatic substitution reaction ___

Discussion

12.	n-factor of KMnO4 in neutral medium is:
Answer» n-factor of ${KMnO}_{4}$ in neutral medium is:

Discussion

13.	Equal weights of ethane and hydrogen are mixed in an empty container at 25 oC. The fraction of total pressure exerted by hydrogen is x:y. Find the value of x:y.
Answer» Equal weights of ethane and hydrogen are mixed in an empty container at $25^{o} C$ . The fraction of total pressure exerted by hydrogen is $x : y$ . Find the value of $x : y$ .

Discussion

14.	42. What is the hybridisation of nitrogen in NH4NO3 ?
Answer» 42. What is the hybridisation of nitrogen in NH4NO3 ?

Discussion

15.	What are vector laws that are given in it's definition?
Answer» What are vector laws that are given in it's definition?

Discussion

16.	The total number of lone pairs present in XeF4 is A) 10 B) 12 C) 14 D) 16 I did not understand the question because I know that there are only 2 lone pairs in XeF4. Can I please get the answer with an explanatation. Thank you
Answer» The total number of lone pairs present in XeF4 is A) 10 B) 12 C) 14 D) 16 I did not understand the question because I know that there are only 2 lone pairs in XeF4. Can I please get the answer with an explanatation. Thank you

Discussion

17.	Soap forms a precipitate in hard water. Explain.
Answer» Soap forms a precipitate in hard water. Explain.

Discussion

18.	In the closest packing of atoms A(radius:ra), the radius of atom B that can be fitted into tetrahedral void is:
Answer» In the closest packing of atoms $A (radius : r_{a})$ , the radius of atom $B$ that can be fitted into tetrahedral void is:

Discussion

19.	For the reaction A(g)⇌B(g) at 495 K, ΔG∘= –9.478 kJ mol−1. If we start the reaction in a closed container at 495 K with 22 millimoles of A, the amount of B in the equilibrium mixture is millimoles. (Round off to the nearest Integer).[R=8.314 J mol−1K−1; ln10=2.303]
Answer» For the reaction $A (g) ⇌ B (g)$ at $495 K, Δ G^{\circ} = - 9.478 {kJ mol}^{- 1}$ . If we start the reaction in a closed container at $495 K$ with $22$ millimoles of $A$ , the amount of $B$ in the equilibrium mixture is millimoles. (Round off to the nearest Integer). $[R = 8.314 {J mol}^{- 1} K^{- 1}; l n 10 = 2.303]$

Discussion

20.	The number of electrons which can have the quantum numbers n=3, l=anything, ml=1 and ms=anything is:
Answer» The number of electrons which can have the quantum numbers $n = 3$ , $l = anything$ , $m_{l} = 1$ and $m_{s} = anything$ is:

Discussion

21.	why are flourides of dblock elements instable in lower oxidation states?
Answer» why are flourides of dblock elements instable in lower oxidation states?

Discussion

22.	What will be the major product?
Answer» What will be the major product?

Discussion

23.	Which of the following will give Cannizzaro’s reaction?
Answer» Which of the following will give Cannizzaro’s reaction?

Discussion

24.	there are three kinds of fruits in the market how many ways are there to purchase 25 of them if each kind is having at least 25 of its fruits available??
Answer» there are three kinds of fruits in the market how many ways are there to purchase 25 of them if each kind is having at least 25 of its fruits available??

Discussion

25.	For the synthesis of HI (g) from H2 (g) and I2 (g) equilibrium constant Kc is 50. The degree of dissociation of HI is:H2(g)+I2(g)⇌2HI(g)(Value of √150=0.1414)
Answer» For the synthesis of $H I$ (g) from $H_{2} (g)$ and $I_{2} (g)$ equilibrium constant $K_{c}$ is $50$ . The degree of dissociation of $H I$ is: $H_{2} (g) + I_{2} (g) ⇌ 2 H I (g)$ (Value of $\sqrt{\frac{1}{50}} = 0.1414$ )

Discussion

26.	Which of the following are aromatic?
Answer» Which of the following are aromatic?

Discussion

27.	75.2 g of C6H5OH is dissolved in 1 kg of solvent of Kf=14 Kmolal−1. If the depression in freezing point is 7 K and the percentage of phenol that dimerises is x%, find the value of x.
Answer» 75.2 g of $C_{6} H_{5} O H$ is dissolved in 1 kg of solvent of $K_{f} = 14 K m o l a l^{- 1}$ . If the depression in freezing point is 7 K and the percentage of phenol that dimerises is x%, find the value of x.

Discussion

28.	Why pyrometallurgy is used in the process of metallurgy is it helpful for us
Answer» Why pyrometallurgy is used in the process of metallurgy is it helpful for us

Discussion

29.	In the extraction of Iron, the function of limestone is:
Answer» In the extraction of Iron, the function of limestone is:

Discussion

30.	23. If in a crystal structure Y constitutes ccp unit cell with Y again occupying 1/2 of the tetrahedral voids, then find approximate packing fraction of the solid.
Answer» 23. If in a crystal structure Y constitutes ccp unit cell with Y again occupying 1/2 of the tetrahedral voids, then find approximate packing fraction of the solid.

Discussion

31.	The oxidation state of S in H2SO5 is
Answer» The oxidation state of $S$ in $H_{2} S O_{5}$ is

Discussion

32.	Among the following ethers, which one will produce methyl alcohol on treatment with hot HI?
Answer» Among the following ethers, which one will produce methyl alcohol on treatment with hot $H I$ ?

Discussion

33.	A block of ice with mass m falls into a lake. After impact, a mass of ice melts. Both the block of ice and the lake have a temperature of 00. If L represents the latent heat of fusion, the distance the ice falls before striking the surface is.
Answer» A block of ice with mass m falls into a lake. After impact, a mass of ice melts. Both the block of ice and the lake have a temperature of 0⁰. If L represents the latent heat of fusion, the distance the ice falls before striking the surface is.

Discussion

34.	According to Heinsbergs the principal, the product of uncertainty is position and velocity for an electron of mass -31 9.1×10 -3 -5 -5 -6 (a) 2.8×10 (b) 3.8×10 (c)5.8×10 (d)6.8×10 How to solve it
Answer» According to Heinsbergs the principal, the product of uncertainty is position and velocity for an electron of mass -31 9.1×10 -3 -5 -5 -6 (a) 2.8×10 (b) 3.8×10 (c)5.8×10 (d)6.8×10 How to solve it

34.

According to Heinsbergs the principal, the product of uncertainty is position and velocity for an electron of mass -31 9.1×10 -3 -5 -5 -6 (a) 2.8×10 (b) 3.8×10 (c)5.8×10 (d)6.8×10 How to solve it

Answer»

According to Heinsbergs the principal, the product of uncertainty is position and velocity for an electron of mass -31

9.1×10

-3 -5 -5 -6

(a) 2.8×10 (b) 3.8×10 (c)5.8×10 (d)6.8×10

How to solve it

Discussion

35.	The only correct combination in which diazonium group has been replaced
Answer» The only correct combination in which diazonium group has been replaced

Discussion

36.	Factors on which the acidity of an organic compound depends are
Answer» Factors on which the acidity of an organic compound depends are

Discussion

37.	Choose the correct option regarding basicity of amines in aqueous phase.
Answer» Choose the correct option regarding basicity of amines in aqueous phase.

Discussion

38.	Consider an acidic buffer solution of acetic acid and sodium acetate at 25oC. What should be the ratio of concentration of sodium acetate and acetic acid so that pH=5 is obtained ? Given :Ka value of acetic acid is 1.8×10−5 log101.8=0.25 and 10(0.25)=1.8
Answer» Consider an acidic buffer solution of acetic acid and sodium acetate at $25^{o} C$ . What should be the ratio of concentration of sodium acetate and acetic acid so that $p H = 5$ is obtained ? Given : $K_{a}$ value of acetic acid is $1.8 \times 10^{- 5}$ ${log}_{10} 1.8 = 0.25 and 10^{(0.25)} = 1.8$

Discussion

39.	The maximum number of unpaired electrons present in p, orbital is
Answer» The maximum number of unpaired electrons present in p, orbital is

Discussion

40.	2.0 g of chalk was dissolved in 10 ml of 4N HCl and the solution was made up to 100 ml. 25 ml of this solution required 18.75 ml of 0.2 N NaOH solution for complete neutralization. Calculate the percentage of pure CaCO3 in the sample of chalk?
Answer» 2.0 g of chalk was dissolved in 10 ml of 4N HCl and the solution was made up to 100 ml. 25 ml of this solution required 18.75 ml of 0.2 N NaOH solution for complete neutralization. Calculate the percentage of pure $C a C O_{3}$ in the sample of chalk?

Discussion

41.	Name an alkaline earth metal whose salt does not impart colour to a flame?
Answer» Name an alkaline earth metal whose salt does not impart colour to a flame?

Discussion

42.	The halogen that is used as an antiseptic is:
Answer» The halogen that is used as an antiseptic is:

Discussion

43.	The reagent which does not give acid chloride on treating with a carboxylic acid is
Answer» The reagent which does not give acid chloride on treating with a carboxylic acid is

Discussion

44.	63.What are odd electron molecules? Explain in detail why they are known as odd electron molecule
Answer» 63.What are odd electron molecules? Explain in detail why they are known as odd electron molecule

Discussion

45.	What would be the end product of following reactions:1)Al2o3 + HCl2)Al + HCL3)Zn +Hcl4)Zno +HCl
Answer» What would be the end product of following reactions: 1)Al2o3 + HCl 2)Al + HCL 3)Zn +Hcl 4)Zno +HCl

Discussion

46.	If the line ax+by+c=0 is normal to the curve xy=1, then:
Answer» If the line $a x + b y + c = 0$ is normal to the curve $x y = 1$ , then:

Discussion

47.	What is the mechanism by which Stephen reaction proceeds
Answer» What is the mechanism by which Stephen reaction proceeds

Discussion

48.	CH_3CHO and }C_6H_5CH_2CHO can be distinguished chemically by
Answer» CH_3CHO and }C_6H_5CH_2CHO can be distinguished chemically by

Discussion

49.	what will the ph of a so\ln formed by mixing 40ml,0.1M HCl with 10ml,0.45M NaOH
Answer» what will the ph of a so\ln formed by mixing 40ml,0.1M HCl with 10ml,0.45M NaOH

Discussion

50.	What is the relation between threshold frequency and work function
Answer» What is the relation between threshold frequency and work function

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Considering the given reaction, the major product among the following is:

why pent-4-yn-1ene is not resonance stabilised?

An electron of mass me and a proton of mass mp are moving with the same speed. The ratio of their de-Brogile wave length (λeλp) is

Ni(CO)4 is high spin complex or low spin complex ? It is tetrahedral molecule so it should be high spin complex ( as tetrahedral complex are always high spin )

Which of the following fischer projections is different from the other three?

Steel is not a pure form of iron. What does it consist of? What is the advantage of adding another substance to iron?

the types of bond present in NH4Cl are1) Electrovalent,covelent and coordinate2)Only Ionic3)Only covalent 4)Covalent and coordinate

While separating a mixture of ortho and para nitrophenols by steam distillation, name the isomer which will be steam volatile. Give reason.

which is more basic so42- or nh2- and why

Each of the compounds shown below has two aromatic rings, labelled as A and B. Identify the number of compounds in which ring B is more active than ring A for electrophilic aromatic substitution reaction ___

n-factor of KMnO4 in neutral medium is:

Equal weights of ethane and hydrogen are mixed in an empty container at 25 oC. The fraction of total pressure exerted by hydrogen is x:y. Find the value of x:y.

42. What is the hybridisation of nitrogen in NH4NO3 ?

What are vector laws that are given in it's definition?

The total number of lone pairs present in XeF4 is A) 10 B) 12 C) 14 D) 16 I did not understand the question because I know that there are only 2 lone pairs in XeF4. Can I please get the answer with an explanatation. Thank you

Soap forms a precipitate in hard water. Explain.

In the closest packing of atoms A(radius:ra), the radius of atom B that can be fitted into tetrahedral void is:

For the reaction A(g)⇌B(g) at 495 K, ΔG∘= –9.478 kJ mol−1. If we start the reaction in a closed container at 495 K with 22 millimoles of A, the amount of B in the equilibrium mixture is millimoles. (Round off to the nearest Integer).[R=8.314 J mol−1K−1; ln10=2.303]

The number of electrons which can have the quantum numbers n=3, l=anything, ml=1 and ms=anything is:

why are flourides of dblock elements instable in lower oxidation states?

What will be the major product?

Which of the following will give Cannizzaro’s reaction?

there are three kinds of fruits in the market how many ways are there to purchase 25 of them if each kind is having at least 25 of its fruits available??

For the synthesis of HI (g) from H2 (g) and I2 (g) equilibrium constant Kc is 50. The degree of dissociation of HI is:H2(g)+I2(g)⇌2HI(g)(Value of √150=0.1414)

Which of the following are aromatic?

75.2 g of C6H5OH is dissolved in 1 kg of solvent of Kf=14 Kmolal−1. If the depression in freezing point is 7 K and the percentage of phenol that dimerises is x%, find the value of x.

Why pyrometallurgy is used in the process of metallurgy is it helpful for us

In the extraction of Iron, the function of limestone is:

23. If in a crystal structure Y constitutes ccp unit cell with Y again occupying 1/2 of the tetrahedral voids, then find approximate packing fraction of the solid.

The oxidation state of S in H2SO5 is

Among the following ethers, which one will produce methyl alcohol on treatment with hot HI?

A block of ice with mass m falls into a lake. After impact, a mass of ice melts. Both the block of ice and the lake have a temperature of 00. If L represents the latent heat of fusion, the distance the ice falls before striking the surface is.

According to Heinsbergs the principal, the product of uncertainty is position and velocity for an electron of mass -31 9.1×10 -3 -5 -5 -6 (a) 2.8×10 (b) 3.8×10 (c)5.8×10 (d)6.8×10 How to solve it

The only correct combination in which diazonium group has been replaced

Factors on which the acidity of an organic compound depends are

Choose the correct option regarding basicity of amines in aqueous phase.

Consider an acidic buffer solution of acetic acid and sodium acetate at 25oC. What should be the ratio of concentration of sodium acetate and acetic acid so that pH=5 is obtained ? Given :Ka value of acetic acid is 1.8×10−5 log101.8=0.25 and 10(0.25)=1.8

The maximum number of unpaired electrons present in p, orbital is

2.0 g of chalk was dissolved in 10 ml of 4N HCl and the solution was made up to 100 ml. 25 ml of this solution required 18.75 ml of 0.2 N NaOH solution for complete neutralization. Calculate the percentage of pure CaCO3 in the sample of chalk?

Name an alkaline earth metal whose salt does not impart colour to a flame?

The halogen that is used as an antiseptic is:

The reagent which does not give acid chloride on treating with a carboxylic acid is

63.What are odd electron molecules? Explain in detail why they are known as odd electron molecule

What would be the end product of following reactions:1)Al2o3 + HCl2)Al + HCL3)Zn +Hcl4)Zno +HCl

If the line ax+by+c=0 is normal to the curve xy=1, then:

What is the mechanism by which Stephen reaction proceeds

CH_3CHO and }C_6H_5CH_2CHO can be distinguished chemically by

what will the ph of a so\ln formed by mixing 40ml,0.1M HCl with 10ml,0.45M NaOH

What is the relation between threshold frequency and work function