46295 + Interview Questions in Chemistry

1.	Explain the terms primary and secondary structure of proteins. What is the difference between α− helix and β− pleated sheet structure of proteins?
Answer» Explain the terms primary and secondary structure of proteins. What is the difference between $α -$ helix and $β -$ pleated sheet structure of proteins?

Discussion

2.	The van der Waals’ constant ‘b’ of helium is 24 mL mol−1. Find the molecular diameter of helium.
Answer» The van der Waals’ constant ‘ $b$ ’ of helium is $24 {mL mol}^{- 1}$ . Find the molecular diameter of helium.

Discussion

3.	Which of the following ammonium salts give(s) nitrogen on heating?
Answer» Which of the following ammonium salts give(s) nitrogen on heating?

Discussion

4.	Metals form basic hydroxides. Which of the following metal hydroxide is the least basic? (a) Mg(OH)2 (b) Ca(OH)2 (c) Sr(OH)2 (d) Ba(OH)2
Answer» Metals form basic hydroxides. Which of the following metal hydroxide is the least basic? (a) $M g (O H)_{2}$ (b) $C a (O H)_{2}$ (c) $S r (O H)_{2}$ (d) $B a (O H)_{2}$

Discussion

5.	Assertion (A) Polytetrafluoroethene is used in making non-stick cookwaters. Reason (R) Fluorine has highest electronegativity. (a) Assertion and Reason both are correct statement But reason does not explain Assertion. (b) Assertion and Reason both are correct statement and Reason explains the Assertion. (c) Both assertion and reason are wrong statements. (d) Assertion is correct statement and Reason is wrong statement. (e) Assertion is wrong statement and reason is correct statement.
Answer» Assertion (A) Polytetrafluoroethene is used in making non-stick cookwaters. Reason (R) Fluorine has highest electronegativity. (a) Assertion and Reason both are correct statement But reason does not explain Assertion. (b) Assertion and Reason both are correct statement and Reason explains the Assertion. (c) Both assertion and reason are wrong statements. (d) Assertion is correct statement and Reason is wrong statement. (e) Assertion is wrong statement and reason is correct statement.

5.

Assertion (A) Polytetrafluoroethene is used in making non-stick cookwaters. Reason (R) Fluorine has highest electronegativity. (a) Assertion and Reason both are correct statement But reason does not explain Assertion. (b) Assertion and Reason both are correct statement and Reason explains the Assertion. (c) Both assertion and reason are wrong statements. (d) Assertion is correct statement and Reason is wrong statement. (e) Assertion is wrong statement and reason is correct statement.

Answer»

Assertion (A) Polytetrafluoroethene is used in making non-stick cookwaters.

Reason (R) Fluorine has highest electronegativity.

(a) Assertion and Reason both are correct statement But reason does not explain Assertion.

(b) Assertion and Reason both are correct statement and Reason explains the Assertion.

(c) Both assertion and reason are wrong statements.

(d) Assertion is correct statement and Reason is wrong statement.

(e) Assertion is wrong statement and reason is correct statement.

Discussion

6.	Match the compounds/ions in Column I with their properties/reactions in Column II ColumnIColumnII1. Benzaldehydep. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyneq. gives precipitate with AgNO33. CN−r. is a nucleophile4. I−s. is involved in cyanohydrin formation
Answer» Match the compounds/ions in Column I with their properties/reactions in Column II $\begin{matrix} C o l u m n I & C o l u m n I I 1. Benzaldehyde & p. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyne & q. gives precipitate with A g N O_{3} 3. C N^{-} & r. is a nucleophile 4. I^{-} & s. is involved in cyanohydrin formation \end{matrix}$

6.

Match the compounds/ions in Column I with their properties/reactions in Column II ColumnIColumnII1. Benzaldehydep. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyneq. gives precipitate with AgNO33. CN−r. is a nucleophile4. I−s. is involved in cyanohydrin formation

Answer»

Match the compounds/ions in Column I with their properties/reactions in Column II

$\begin{matrix} C o l u m n I & C o l u m n I I 1. Benzaldehyde & p. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyne & q. gives precipitate with A g N O_{3} 3. C N^{-} & r. is a nucleophile 4. I^{-} & s. is involved in cyanohydrin formation \end{matrix}$

Discussion

7.	Highest molar conductivity will be in the case of a)[CO(NH3)6Cl3] b)[CO(NH3)3Cl3]
Answer» Highest molar conductivity will be in the case of a)[CO(NH3)6Cl3] b)[CO(NH3)3Cl3]

7.

Highest molar conductivity will be in the case of a)[CO(NH3)6Cl3] b)[CO(NH3)3Cl3]

Answer»

Highest molar conductivity will be in the case of

a)[CO(NH3)6Cl3]

b)[CO(NH3)3Cl3]

Discussion

8.	Which of the following pairs does not have the same shape?
Answer» Which of the following pairs does not have the same shape?

Discussion

9.	When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral after the decay if the process is
Answer» When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral after the decay if the process is

Discussion

10.	Most basic oxide out of following is:
Answer» Most basic oxide out of following is:

Discussion

11.	The transition from state n = 4 to n = 3 in a He+ ion result in ultraviolet radiation. Infrared radiation will be obtained in the transition from
Answer» The transition from state n = 4 to n = 3 in a $H e^{+}$ ion result in ultraviolet radiation. Infrared radiation will be obtained in the transition from

Discussion

12.	Calculate the number of oxygen atoms present in 88 g of CO2. What would be the mass of CO that has the same number of oxygen atoms?
Answer» Calculate the number of oxygen atoms present in $88 g$ of $C O_{2}$ . What would be the mass of $C O$ that has the same number of oxygen atoms?

Discussion

13.	Solid AgNO3 is added to a solution which is 0.1 M in Cl− and 0.1 M in CrO2−4. If Ksp values for AgCl and Ag2CrO4 solutions are 1.7×10−10 and 1.9×10−12 respectively. Find the minimum concentration of Cl− when Ag2CrO4 starts precipitating.
Answer» Solid $A g N O_{3}$ is added to a solution which is $0.1 M$ in $C l^{-}$ and $0.1 M$ in $C r O_{4}^{2 -}$ . If $K_{s p}$ values for $A g C l$ and $A g_{2} C r O_{4}$ solutions are $1.7 \times 10^{- 10}$ and $1.9 \times 10^{- 12}$ respectively. Find the minimum concentration of $C l^{-}$ when $A g_{2} C r O_{4}$ starts precipitating.

Discussion

14.	What are the quantum reasons due to which attractions and repulsions happen between like and unlike charges
Answer» What are the quantum reasons due to which attractions and repulsions happen between like and unlike charges

Discussion

15.	What mass of P4O10 will be obtained from the reaction of 1.33 g of P4 and 5.07 g of oxygen?
Answer» What mass of P4O10 will be obtained from the reaction of 1.33 g of P4 and 5.07 g of oxygen?

Discussion

16.	Propanal and pentan-3-one are the ozonolysis products of an alkene? What is the structural formula of the alkene?
Answer» Propanal and pentan-3-one are the ozonolysis products of an alkene? What is the structural formula of the alkene?

Discussion

17.	What is order of halogens according to +R effect and why?
Answer» What is order of halogens according to +R effect and why?

Discussion

18.	How many no. Of total atoms Represented by CuSO4CuSO4.5H2O
Answer» How many no. Of total atoms Represented by CuSO₄CuSO4.5H₂O

Discussion

19.	What is significance of finding gram equivalent weight
Answer» What is significance of finding gram equivalent weight

Discussion

20.	When two ethyl bromide react with two sodium atom in a anion mechanism ('WOORTZ' reaction) only two carbon compound is formed?. Doesn't the product side forms double the carbon atoms than reactant??
Answer» When two ethyl bromide react with two sodium atom in a anion mechanism ('WOORTZ' reaction) only two carbon compound is formed?. Doesn't the product side forms double the carbon atoms than reactant??

Discussion

21.	What percentage of a sample of nitrogen must be allowed to escape, if its temperature, pressure and volume are changed from 220∘C,3.0 atm and 1.65 L to 110∘C, 0.7 atm and 1.0 L respectively?
Answer» What percentage of a sample of nitrogen must be allowed to escape, if its temperature, pressure and volume are changed from $220^{\circ} C, 3.0$ atm and $1.65 L$ to $110^{\circ} C$ , 0.7 atm and 1.0 L respectively?

Discussion

22.	If ionisation potential for hydrogen atom is 13.6 eV, then ionisation potential for Li+2 will be:
Answer» If ionisation potential for hydrogen atom is 13.6 eV, then ionisation potential for $L i^{+ 2}$ will be:

Discussion

23.	What is the pH of 0.5M aqueous solution of NaCN? Given pKb of CN− = 4.70
Answer» What is the $p H$ of $0.5 M$ aqueous solution of $N a C N$ ? Given $p K_{b}$ of $C N^{-}$ = $4.70$

Discussion

24.	An orbital is identified by how many quantum numbers?
Answer» An orbital is identified by how many quantum numbers?

Discussion

25.	Which one of the following is a water soluble vitamin?
Answer» Which one of the following is a water soluble vitamin?

Discussion

26.	The correct plot for Boyle's law is:-
Answer» The correct plot for Boyle's law is:-

Discussion

27.	Which of the following will give a white precipitate most readily when treated with AgNO3 solution?
Answer» Which of the following will give a white precipitate most readily when treated with $A g N O_{3}$ solution?

Discussion

28.	Chromium has most stable oxidation state of
Answer» Chromium has most stable oxidation state of

Discussion

29.	Which of the following molecules is/are polar?
Answer» Which of the following molecules is/are polar?

Discussion

30.	The pair of compound which cannot exist together in solution is
Answer» The pair of compound which cannot exist together in solution is

Discussion

31.	Upon heating with Cu2S, the reagent(s) that give copper metal is/are (IIT-JEE, Advanced 2014)
Answer» Upon heating with $C u_{2} S,$ the reagent(s) that give copper metal is/are (IIT-JEE, Advanced 2014)

Discussion

32.	The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is
Answer» The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

32.

The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

Answer»

The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

Discussion

33.	Which of the following order of radii is correct?
Answer» Which of the following order of radii is correct?

Discussion

34.	In an experiment during the analysis of a carbon compound, 145 l of H2O was collected at 760 mm Hg pressure at 27∘ C temperature. The mass of H2O is nearly.......
Answer» In an experiment during the analysis of a carbon compound, 145 l of $H_{2} O$ was collected at 760 mm Hg pressure at $27^{\circ}$ C temperature. The mass of $H_{2} O$ is nearly.......

Discussion

35.	2, 4, 6 – Trinitroiodobenzene has three C – N bonds labeled as a, b and c. The correct bond length of the three bonds is -
Answer» 2, 4, 6 – Trinitroiodobenzene has three C – N bonds labeled as a, b and c. The correct bond length of the three bonds is -

35.

2, 4, 6 – Trinitroiodobenzene has three C – N bonds labeled as a, b and c. The correct bond length of the three bonds is -

Answer»

2, 4, 6 – Trinitroiodobenzene has three C – N bonds labeled as a, b and c. The correct bond length of the three bonds is -

Discussion

36.	Metallic magnesium is prepared by
Answer» Metallic magnesium is prepared by

Discussion

37.	The oxidation number of cobalt in K[Co(CO)4] is
Answer» The oxidation number of cobalt in $K [C o (C O)_{4}]$ is

Discussion

38.	In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are correct statements and reason explains the assertion. (b) Both assertion and reason are wrong statements. (c) Assertion is correct statement and reason is wrong statement. (d) Assertion is wrong statement and reason is correct statement. (e) Assertion and reason both are correct statements but reason does not explain assertion. Assertion (A) Vitamin D can be stored in our body. Reason (R) Vitamin D is fat soluble vitamin.
Answer» In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are correct statements and reason explains the assertion. (b) Both assertion and reason are wrong statements. (c) Assertion is correct statement and reason is wrong statement. (d) Assertion is wrong statement and reason is correct statement. (e) Assertion and reason both are correct statements but reason does not explain assertion. Assertion (A) Vitamin D can be stored in our body. Reason (R) Vitamin D is fat soluble vitamin.

Discussion

39.	Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states? [CBSE AIPMT 2009]
Answer» Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states? [CBSE AIPMT 2009]

Discussion

40.	The correct order of mobility of alkali metal ions in aqueous solution is:
Answer» The correct order of mobility of alkali metal ions in aqueous solution is:

Discussion

41.	If we express the energy of a photon in KeV and the wavelength in angstroms, then energy of a photon can be calculated from the relation
Answer» If we express the energy of a photon in KeV and the wavelength in angstroms, then energy of a photon can be calculated from the relation

Discussion

42.	Number of stereo centres and stereo isomers of the given compound Will be
Answer» Number of stereo centres and stereo isomers of the given compound Will be

42.

Number of stereo centres and stereo isomers of the given compound Will be

Answer»

Number of stereo centres and stereo isomers of the given compound

Will be

Discussion

43.	0.5g of an organic compound on kjeldhal's analysis gave enough ammonia to just neutralize 10cm3 of 1M H2SO4. The %of nitrogen in the compound is
Answer» 0.5g of an organic compound on kjeldhal's analysis gave enough ammonia to just neutralize 10cm3 of 1M $H_{2} S O_{4}$ . The $%$ of nitrogen in the compound is

Discussion

44.	Which of the following on reaction with aqueous KOH gives acetaldehyde?
Answer» Which of the following on reaction with aqueous KOH gives acetaldehyde?

Discussion

45.	A photon of wavelength 4 × 10–7 m strikes on the metal surface, the work function of the metal is 2.13 eV. Calculate(i) the energy of the photon (eV),(ii) the kinetic energy of the emission, and(iii) the velocity of the photoelectron (1 eV= 1.6020 × 10–19 J).
Answer» A photon of wavelength 4 × 10^–7 m strikes on the metal surface, the work function of the metal is 2.13 eV. Calculate (i) the energy of the photon (eV), (ii) the kinetic energy of the emission, and (iii) the velocity of the photoelectron (1 eV= 1.6020 × 10^–19 J).

45.

A photon of wavelength 4 × 10–7 m strikes on the metal surface, the work function of the metal is 2.13 eV. Calculate(i) the energy of the photon (eV),(ii) the kinetic energy of the emission, and(iii) the velocity of the photoelectron (1 eV= 1.6020 × 10–19 J).

Answer»

A photon of wavelength 4 × 10^–7 m strikes on the metal surface, the work function of the metal is 2.13 eV. Calculate
(i) the energy of the photon (eV),

(ii) the kinetic energy of the emission, and

(iii) the velocity of the photoelectron (1 eV= 1.6020 × 10^–19 J).

Discussion

46.	Which of the following has the lowest pKa value?
Answer» Which of the following has the lowest $p K_{a}$ value?

Discussion

47.	The de broglie wavelength of an electron (initially at rest) accelerated by an electric potential 'V' volts is given by: Given: me=9.1×10−31 kg, e=1.6×10−19 C, h=6.6×10−34 Js
Answer» The de broglie wavelength of an electron (initially at rest) accelerated by an electric potential 'V' volts is given by: Given: $m_{e} = 9.1 \times 10^{- 31} k g, e = 1.6 \times 10^{- 19} C,$ $h = 6.6 \times 10^{- 34} J s$

Discussion

48.	The element which does not exist in liquid state at room temperature are:
Answer» The element which does not exist in liquid state at room temperature are:

48.

The element which does not exist in liquid state at room temperature are:

Answer»

The element which does not exist in liquid state at room temperature are:

Discussion

49.	The Internal Energy Change (ΔU) of a Process does not depends upon
Answer» The Internal Energy Change ( $Δ U$ ) of a Process does not depends upon

Discussion

50.	According to Wein's law
Answer» According to Wein's law

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Explain the terms primary and secondary structure of proteins. What is the difference between α− helix and β− pleated sheet structure of proteins?

The van der Waals’ constant ‘b’ of helium is 24 mL mol−1. Find the molecular diameter of helium.

Which of the following ammonium salts give(s) nitrogen on heating?

Metals form basic hydroxides. Which of the following metal hydroxide is the least basic? (a) Mg(OH)2 (b) Ca(OH)2 (c) Sr(OH)2 (d) Ba(OH)2

Match the compounds/ions in Column I with their properties/reactions in Column II ColumnIColumnII1. Benzaldehydep. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyneq. gives precipitate with AgNO33. CN−r. is a nucleophile4. I−s. is involved in cyanohydrin formation

Highest molar conductivity will be in the case of a)[CO(NH3)6Cl3] b)[CO(NH3)3Cl3]

Which of the following pairs does not have the same shape?

When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral after the decay if the process is

Most basic oxide out of following is:

The transition from state n = 4 to n = 3 in a He+ ion result in ultraviolet radiation. Infrared radiation will be obtained in the transition from

Calculate the number of oxygen atoms present in 88 g of CO2. What would be the mass of CO that has the same number of oxygen atoms?

Solid AgNO3 is added to a solution which is 0.1 M in Cl− and 0.1 M in CrO2−4. If Ksp values for AgCl and Ag2CrO4 solutions are 1.7×10−10 and 1.9×10−12 respectively. Find the minimum concentration of Cl− when Ag2CrO4 starts precipitating.

What are the quantum reasons due to which attractions and repulsions happen between like and unlike charges

What mass of P4O10 will be obtained from the reaction of 1.33 g of P4 and 5.07 g of oxygen?

Propanal and pentan-3-one are the ozonolysis products of an alkene? What is the structural formula of the alkene?

What is order of halogens according to +R effect and why?

How many no. Of total atoms Represented by CuSO​​​​​​4​​CuSO4.5H2O

What is significance of finding gram equivalent weight

When two ethyl bromide react with two sodium atom in a anion mechanism ('WOORTZ' reaction) only two carbon compound is formed?. Doesn't the product side forms double the carbon atoms than reactant??

What percentage of a sample of nitrogen must be allowed to escape, if its temperature, pressure and volume are changed from 220∘C,3.0 atm and 1.65 L to 110∘C, 0.7 atm and 1.0 L respectively?

If ionisation potential for hydrogen atom is 13.6 eV, then ionisation potential for Li+2 will be:

What is the pH of 0.5M aqueous solution of NaCN? Given pKb of CN− = 4.70

An orbital is identified by how many quantum numbers?

Which one of the following is a water soluble vitamin?

The correct plot for Boyle's law is:-

Which of the following will give a white precipitate most readily when treated with AgNO3 solution?

Chromium has most stable oxidation state of

Which of the following molecules is/are polar?

The pair of compound which cannot exist together in solution is

Upon heating with Cu2S, the reagent(s) that give copper metal is/are (IIT-JEE, Advanced 2014)

The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

Which of the following order of radii is correct?

In an experiment during the analysis of a carbon compound, 145 l of H2O was collected at 760 mm Hg pressure at 27∘ C temperature. The mass of H2O is nearly.......

2, 4, 6 – Trinitroiodobenzene has three C – N bonds labeled as a, b and c. The correct bond length of the three bonds is -

Metallic magnesium is prepared by

The oxidation number of cobalt in K[Co(CO)4] is

Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states? [CBSE AIPMT 2009]

The correct order of mobility of alkali metal ions in aqueous solution is:

If we express the energy of a photon in KeV and the wavelength in angstroms, then energy of a photon can be calculated from the relation

Number of stereo centres and stereo isomers of the given compound Will be

0.5g of an organic compound on kjeldhal's analysis gave enough ammonia to just neutralize 10cm3 of 1M H2SO4. The %of nitrogen in the compound is

Which of the following on reaction with aqueous KOH gives acetaldehyde?

A photon of wavelength 4 × 10–7 m strikes on the metal surface, the work function of the metal is 2.13 eV. Calculate(i) the energy of the photon (eV),(ii) the kinetic energy of the emission, and(iii) the velocity of the photoelectron (1 eV= 1.6020 × 10–19 J).

Which of the following has the lowest pKa value?

The de broglie wavelength of an electron (initially at rest) accelerated by an electric potential 'V' volts is given by: Given: me=9.1×10−31 kg, e=1.6×10−19 C, h=6.6×10−34 Js

The element which does not exist in liquid state at room temperature are:

The Internal Energy Change (ΔU) of a Process does not depends upon

According to Wein's law

How many no. Of total atoms Represented by CuSO4CuSO4.5H2O