46295 + Interview Questions in Chemistry

1.	80 gms of water at 30C is poured on a large block of ice at 0C the mass of the ice that melts is
Answer» 80 gms of water at 30C is poured on a large block of ice at 0C the mass of the ice that melts is

Discussion

2.	90-95% of Gram negative bacteria are pathogenic because
Answer» 90-95% of Gram negative bacteria are pathogenic because

Discussion

3.	Conversion of Ketoximes to N- substituted amides is known as Beckmann rearrangement. In this rearrangement migration takes place from carbon to nitrogen. The reaction is catalyzed by acidic reagents. The main function of the acidic catalyst is to convert -OH of the oxime into a better leaving group by protonation.
Answer» Conversion of Ketoximes to N- substituted amides is known as Beckmann rearrangement. In this rearrangement migration takes place from carbon to nitrogen. The reaction is catalyzed by acidic reagents. The main function of the acidic catalyst is to convert -OH of the oxime into a better leaving group by protonation.

3.

Conversion of Ketoximes to N- substituted amides is known as Beckmann rearrangement. In this rearrangement migration takes place from carbon to nitrogen. The reaction is catalyzed by acidic reagents. The main function of the acidic catalyst is to convert -OH of the oxime into a better leaving group by protonation.

Answer»

Conversion of Ketoximes to N- substituted amides is known as Beckmann rearrangement. In this rearrangement migration takes place from carbon to nitrogen. The reaction is catalyzed by acidic reagents. The main function of the acidic catalyst is to convert -OH of the oxime into a better leaving group by protonation.

Discussion

4.	Which of these is anti-aromatic in nature?
Answer» Which of these is anti-aromatic in nature?

Discussion

5.	For the process: H2O(l) (1 bar, 373 K)⇌H2O(g) (1 bar, 373 K) the correct set of thermodynamic parameters is:
Answer» For the process: $H_{2} O_{(l)} (1 bar, 373 K) ⇌ H_{2} O_{(g)} (1 bar, 373 K)$ the correct set of thermodynamic parameters is:

Discussion

6.	Oxidizing action increases in the following order:
Answer» Oxidizing action increases in the following order:

Discussion

7.	Naturally occuring lithium consists of two isotopes whose atomic weights are 6.015 u and 7.016 u. The atomic weight of natural lithium is 6.491 u. The percentage by number of atoms of each isotpe in natural lithium is and respectively.
Answer» Naturally occuring lithium consists of two isotopes whose atomic weights are 6.015 u and 7.016 u. The atomic weight of natural lithium is 6.491 u. The percentage by number of atoms of each isotpe in natural lithium is and respectively.

Discussion

8.	Which of the following compounds can readily give precipitate with AgClO4?
Answer» Which of the following compounds can readily give precipitate with $A g C l O_{4}$ ?

Discussion

9.	Please tell me how to find whether the given oxide is acidic or basic?
Answer» Please tell me how to find whether the given oxide is acidic or basic?

Discussion

10.	The equilibrium constant for the reaction : A(g)+B(g)⇌C(g)+D(g) is 1 \times 10−2 at 298K and it is 2 at 373K. The chemical process resulting the formation of C and D is
Answer» The equilibrium constant for the reaction : $A (g) + B (g) ⇌ C (g) + D (g)$ is 1 \times $10^{- 2}$ at 298K and it is 2 at 373K. The chemical process resulting the formation of C and D is

10.

The equilibrium constant for the reaction : A(g)+B(g)⇌C(g)+D(g) is 1 \times 10−2 at 298K and it is 2 at 373K. The chemical process resulting the formation of C and D is

Answer»

The equilibrium constant for the reaction :

$A (g) + B (g) ⇌ C (g) + D (g)$ is 1 \times $10^{- 2}$ at 298K and it is 2 at 373K. The chemical process resulting the formation of C and D is

Discussion

11.	When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution:
Answer» When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution:

11.

When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution:

Answer»

When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution:

Discussion

12.	50 mL of a gas A diffuse through a membrane in the same time as for the diffusion of 40 mL of a gas B under identical conditions. If the molecular weight of A is 64, that of B would be
Answer» 50 mL of a gas A diffuse through a membrane in the same time as for the diffusion of 40 mL of a gas B under identical conditions. If the molecular weight of A is 64, that of B would be

Discussion

13.	(X) is on monochlorination, gives only one product. Choose the correct option regarding given reaction sequences?
Answer» (X) is on monochlorination, gives only one product. Choose the correct option regarding given reaction sequences?

Discussion

14.	What will be the oxidation state of Sulphur in H2SO5?
Answer» What will be the oxidation state of Sulphur in $H_{2} S O_{5}$ ?

Discussion

15.	The largest negative integer is ____ and the smallest positive integer is ___.
Answer» The largest negative integer is ____ and the smallest positive integer is ___.

Discussion

16.	Which of the following statements is correct?
Answer» Which of the following statements is correct?

Discussion

17.	Minamata disease is due to pollution of-
Answer» Minamata disease is due to pollution of-

Discussion

18.	in difference between co valent and ionic compounds it was mentioned molecular and ionic reactions briefly can you please elaborate on what are ionic bonds and what are molecular bonds and some differences between them.
Answer» in difference between co valent and ionic compounds it was mentioned molecular and ionic reactions briefly can you please elaborate on what are ionic bonds and what are molecular bonds and some differences between them.

Discussion

19.	What is the correct definition for evaporation and boiling? And what is the difference between them?
Answer» What is the correct definition for evaporation and boiling? And what is the difference between them?

Discussion

20.	Calculate the pH of a solution prepared by mixing 2.0 mL of a strong acid (HCI) solution of pH 3.0 and 3.0 mL of a strong base (NaOH) of pH 10.0
Answer» Calculate the pH of a solution prepared by mixing 2.0 mL of a strong acid (HCI) solution of pH 3.0 and 3.0 mL of a strong base (NaOH) of pH 10.0

Discussion

21.	Draw the structures of all isomeric alcohols of molecular formula C5H12O and give their IUPAC names. Classify the isomers of alcohols in question 3. (i) as primary secondary and tertiary alcohols.
Answer» Draw the structures of all isomeric alcohols of molecular formula $C_{5} H_{12} O$ and give their IUPAC names. Classify the isomers of alcohols in question 3. (i) as primary secondary and tertiary alcohols.

21.

Draw the structures of all isomeric alcohols of molecular formula C5H12O and give their IUPAC names. Classify the isomers of alcohols in question 3. (i) as primary secondary and tertiary alcohols.

Answer»

Draw the structures of all isomeric alcohols of molecular formula $C_{5} H_{12} O$ and give their IUPAC names.

Classify the isomers of alcohols in question 3. (i) as primary secondary and tertiary alcohols.

Discussion

22.	Ethyl aceto acetate shows which type of isomerism
Answer» Ethyl aceto acetate shows which type of isomerism

Discussion

23.	According to first law of thermodynamics, heat supplied is used to do work and to change internal energy. But for Carnot engine, we see the heat supplied us used to do work and the remaining is discarded to the sink.Then what about heat being used to do internal energy?
Answer» According to first law of thermodynamics, heat supplied is used to do work and to change internal energy. But for Carnot engine, we see the heat supplied us used to do work and the remaining is discarded to the sink.Then what about heat being used to do internal energy?

Discussion

24.	why chloromethane have more dipole moment than fluoromethane?
Answer» why chloromethane have more dipole moment than fluoromethane?

Discussion

25.	The oxidation numbers of C(bonded to 2H atoms) and C(bonded to 1H atom) in propene CH3-CH=CH2 are respectively OPTIONS A. -1, -2. B. -1, -1 C. -2, -1. D. +2, -1 [Dear mentor please give the detailed solution along with explaination.]
Answer» The oxidation numbers of C(bonded to 2H atoms) and C(bonded to 1H atom) in propene CH3-CH=CH2 are respectively OPTIONS A. -1, -2. B. -1, -1 C. -2, -1. D. +2, -1 [Dear mentor please give the detailed solution along with explaination.]

Discussion

26.	For a reaction X + Y ----> Z , rate directly proportional to [X]. What is (i) molecularity and (ii) order of reaction ? OPTIONS a. (i) 2 , (ii) 1 b. (i) 2 , (ii) 2 c. (i) 1 , (ii) 1. d. (i) 1 , (ii) 2 [Dear mentor please give the detailed solution]
Answer» For a reaction X + Y ----> Z , rate directly proportional to [X]. What is (i) molecularity and (ii) order of reaction ? OPTIONS a. (i) 2 , (ii) 1 b. (i) 2 , (ii) 2 c. (i) 1 , (ii) 1. d. (i) 1 , (ii) 2 [Dear mentor please give the detailed solution]

26.

For a reaction X + Y ----> Z , rate directly proportional to [X]. What is (i) molecularity and (ii) order of reaction ? OPTIONS a. (i) 2 , (ii) 1 b. (i) 2 , (ii) 2 c. (i) 1 , (ii) 1. d. (i) 1 , (ii) 2 [Dear mentor please give the detailed solution]

Answer»

For a reaction X + Y ----> Z , rate directly proportional to [X].

What is (i) molecularity and (ii) order of reaction ?

OPTIONS

a. (i) 2 , (ii) 1 b. (i) 2 , (ii) 2

c. (i) 1 , (ii) 1. d. (i) 1 , (ii) 2

[Dear mentor please give the detailed solution]

Discussion

27.	Pauling’s electronegativity is based on
Answer» Pauling’s electronegativity is based on

Discussion

28.	Which form is more stable among all these arrangements?
Answer» Which form is more stable among all these arrangements?

Discussion

29.	Calculate the weight of Iron which will be converted into its oxide by the action of 18 g of steam. Given the reaction : 3Fe+4H2O→Fe3O4+4H2 (Atomic mass of Fe=56 g.
Answer» Calculate the weight of Iron which will be converted into its oxide by the action of 18 g of steam. Given the reaction : $3 F e + 4 H_{2} O \to F e_{3} O_{4} + 4 H_{2}$ (Atomic mass of Fe=56 g.

Discussion

30.	The van't Hoff factor (i) for a dilute aqueous solution of glucose is:
Answer» The van't Hoff factor (i) for a dilute aqueous solution of glucose is:

Discussion

31.	For N2(g) + 3H2(g) ⇌ 2NH3(g) + heat
Answer» For $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g) + h e a t$

31.

For N2(g) + 3H2(g) ⇌ 2NH3(g) + heat

Answer»

For $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g) + h e a t$

Discussion

32.	At 50oC, the self-ionisation constant (ionic product) of NH3 is given as, KNH3=[NH+4][NH−2]=10−30M2. How many NH−2 ions are present per mm3 of pure liquid ammonia?
Answer» At $50^{o} C,$ the self-ionisation constant (ionic product) of $N H_{3}$ is given as, $K_{N H_{3}} = [N H_{4}^{+}] [N H_{2}^{-}] = 10^{- 30} M^{2}$ . How many $N H_{2}^{-}$ ions are present per $m m^{3}$ of pure liquid ammonia?

Discussion

33.	Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that
Answer» Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that

Discussion

34.	In the breakdown of the ozone layer, ozone directly reacts with
Answer» In the breakdown of the ozone layer, ozone directly reacts with

Discussion

35.	How e arfiaffi of Cl is greater than F
Answer» How e arfiaffi of Cl is greater than F

Discussion

36.	What is the geometry and hybridisation of copper in [ Cu (NH3 )4 ] + ? Please explain.
Answer» What is the geometry and hybridisation of copper in [ Cu (NH₃)₄] ⁺? Please explain.

Discussion

37.	12g of me on the reacting with acid gives hydrogen gas the volume of which at stp is
Answer» 12g of me on the reacting with acid gives hydrogen gas the volume of which at stp is

Discussion

38.	Which of the following is affected by water?
Answer» Which of the following is affected by water?

Discussion

39.	Benzene diazonium chloride on reaction with KCN in the presence of CuCN yields X. X on hydrolysis gives Y. Y can also be obtained from
Answer» Benzene diazonium chloride on reaction with KCN in the presence of CuCN yields X. X on hydrolysis gives Y. Y can also be obtained from

Discussion

40.	Which reaction gives colloidal solution
Answer» Which reaction gives colloidal solution

Discussion

41.	The major product formed when methyl iodide reacts with sodium nitrite is
Answer» The major product formed when methyl iodide reacts with sodium nitrite is

Discussion

42.	According to Bohr's theory, the energy of an electron in the nth energy level of hydrogen like species is given by: En=−21.76×10−19n2(Z2) J Calculate the longest wavelength of light that will be needed to completely remove an electron from the third Bohr orbit of He+ ion.
Answer» According to Bohr's theory, the energy of an electron in the $n^{t h}$ energy level of hydrogen like species is given by: $E_{n} = \frac{- 21.76 \times 10^{- 19}}{n^{2}} (Z^{2}) J$ Calculate the longest wavelength of light that will be needed to completely remove an electron from the third Bohr orbit of $H e^{+}$ ion.

Discussion

43.	Consider the reaction A⟶B. The concentration of both the reactants and the products varies exponentially with time. Which of the following figures correctly describes the change in concentration of reactants and products with time?
Answer» Consider the reaction $A ⟶ B$ . The concentration of both the reactants and the products varies exponentially with time. Which of the following figures correctly describes the change in concentration of reactants and products with time?

43.

Consider the reaction A⟶B. The concentration of both the reactants and the products varies exponentially with time. Which of the following figures correctly describes the change in concentration of reactants and products with time?

Answer»

Consider the reaction $A ⟶ B$ . The concentration of both the reactants and the products varies exponentially with time. Which of the following figures correctly describes the change in concentration of reactants and products with time?

Discussion

44.	What is true about ice?
Answer» What is true about ice?

Discussion

45.	Hydrogen by donating one electron forms H+. In this property, it resembles the
Answer» Hydrogen by donating one electron forms $H^{+}$ . In this property, it resembles the

Discussion

46.	In bisulphate ion, HSO−4 the formal charge on S atom is
Answer» In bisulphate ion, $H S O_{4}^{-}$ the formal charge on S atom is

Discussion

47.	The ionisation constant of phenol is higher than that of ethanol because
Answer» The ionisation constant of phenol is higher than that of ethanol because

Discussion

48.	Maximum enol content is in:
Answer» Maximum enol content is in:

Discussion

49.	If the shortest wavelength of the spectral line of H - atom in Lyman series is x, then the longest wavelength of the line in Balmer series of Li2+ is
Answer» If the shortest wavelength of the spectral line of H - atom in Lyman series is x, then the longest wavelength of the line in Balmer series of $L i^{2 +}$ is

Discussion

50.	On going down a main subgroup in the periodic table ( example Li to Cs in IA or Be to Ba in II A) the expected trend of change in atomic radius is a:
Answer» On going down a main subgroup in the periodic table ( example Li to Cs in IA or Be to Ba in II A) the expected trend of change in atomic radius is a:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

80 gms of water at 30C is poured on a large block of ice at 0C the mass of the ice that melts is

90-95% of Gram negative bacteria are pathogenic because

Which of these is anti-aromatic in nature?

For the process: H2O(l) (1 bar, 373 K)⇌H2O(g) (1 bar, 373 K) the correct set of thermodynamic parameters is:

Oxidizing action increases in the following order:

Naturally occuring lithium consists of two isotopes whose atomic weights are 6.015 u and 7.016 u. The atomic weight of natural lithium is 6.491 u. The percentage by number of atoms of each isotpe in natural lithium is and respectively.

Which of the following compounds can readily give precipitate with AgClO4?

Please tell me how to find whether the given oxide is acidic or basic?

The equilibrium constant for the reaction : A(g)+B(g)⇌C(g)+D(g) is 1 \times 10−2 at 298K and it is 2 at 373K. The chemical process resulting the formation of C and D is

When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution:

50 mL of a gas A diffuse through a membrane in the same time as for the diffusion of 40 mL of a gas B under identical conditions. If the molecular weight of A is 64, that of B would be

(X) is on monochlorination, gives only one product. Choose the correct option regarding given reaction sequences?

What will be the oxidation state of Sulphur in H2SO5?

The largest negative integer is ____ and the smallest positive integer is ___.

Which of the following statements is correct?

Minamata disease is due to pollution of-

in difference between co valent and ionic compounds it was mentioned molecular and ionic reactions briefly can you please elaborate on what are ionic bonds and what are molecular bonds and some differences between them.

What is the correct definition for evaporation and boiling? And what is the difference between them?

Calculate the pH of a solution prepared by mixing 2.0 mL of a strong acid (HCI) solution of pH 3.0 and 3.0 mL of a strong base (NaOH) of pH 10.0

Draw the structures of all isomeric alcohols of molecular formula C5H12O and give their IUPAC names. Classify the isomers of alcohols in question 3. (i) as primary secondary and tertiary alcohols.

Ethyl aceto acetate shows which type of isomerism

According to first law of thermodynamics, heat supplied is used to do work and to change internal energy. But for Carnot engine, we see the heat supplied us used to do work and the remaining is discarded to the sink.Then what about heat being used to do internal energy?

why chloromethane have more dipole moment than fluoromethane?

The oxidation numbers​ of C(bonded to 2H atoms) and C(bonded to 1H atom) in propene CH3-CH=CH2 are respectively OPTIONS A. -1, -2. B. -1, -1 C. -2, -1. D. +2, -1 [Dear mentor please give the detailed solution along with explaination.]

For a reaction X + Y ----&gt; Z , rate directly proportional​ to [X]. What is (i) molecularity and (ii) order of reaction ? OPTIONS​ a. (i) 2 , (ii) 1 b. (i) 2 , (ii) 2 c. (i) 1 , (ii) 1. d. (i) 1 , (ii) 2 [Dear mentor please give the detailed solution]

Pauling’s electronegativity is based on

Which form is more stable among all these arrangements?

Calculate the weight of Iron which will be converted into its oxide by the action of 18 g of steam. Given the reaction : 3Fe+4H2O→Fe3O4+4H2 (Atomic mass of Fe=56 g.

The van't Hoff factor (i) for a dilute aqueous solution of glucose is:

For N2(g) + 3H2(g) ⇌ 2NH3(g) + heat

At 50oC, the self-ionisation constant (ionic product) of NH3 is given as, KNH3=[NH+4][NH−2]=10−30M2. How many NH−2 ions are present per mm3 of pure liquid ammonia?

Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that

In the breakdown of the ozone layer, ozone directly reacts with

How e arfiaffi of Cl is greater than F

What is the geometry and hybridisation of copper in [ Cu (NH3 )4 ] + ? Please explain.

12g of me on the reacting with acid gives hydrogen gas the volume of which at stp is

Which of the following is affected by water?

Benzene diazonium chloride on reaction with KCN in the presence of CuCN yields X. X on hydrolysis gives Y. Y can also be obtained from

Which reaction gives colloidal solution

The major product formed when methyl iodide reacts with sodium nitrite is

According to Bohr's theory, the energy of an electron in the nth energy level of hydrogen like species is given by: En=−21.76×10−19n2(Z2) J Calculate the longest wavelength of light that will be needed to completely remove an electron from the third Bohr orbit of He+ ion.

Consider the reaction A⟶B. The concentration of both the reactants and the products varies exponentially with time. Which of the following figures correctly describes the change in concentration of reactants and products with time?

What is true about ice?

Hydrogen by donating one electron forms H+. In this property, it resembles the

In bisulphate ion, HSO−4 the formal charge on S atom is

The ionisation constant of phenol is higher than that of ethanol because

Maximum enol content is in:

If the shortest wavelength of the spectral line of H - atom in Lyman series is x, then the longest wavelength of the line in Balmer series of Li2+ is

On going down a main subgroup in the periodic table ( example Li to Cs in IA or Be to Ba in II A) the expected trend of change in atomic radius is a:

The largest negative integer is __ and the smallest positive integer is _.

The oxidation numbers of C(bonded to 2H atoms) and C(bonded to 1H atom) in propene CH3-CH=CH2 are respectively OPTIONS A. -1, -2. B. -1, -1 C. -2, -1. D. +2, -1 [Dear mentor please give the detailed solution along with explaination.]

For a reaction X + Y ----> Z , rate directly proportional to [X]. What is (i) molecularity and (ii) order of reaction ? OPTIONS a. (i) 2 , (ii) 1 b. (i) 2 , (ii) 2 c. (i) 1 , (ii) 1. d. (i) 1 , (ii) 2 [Dear mentor please give the detailed solution]