46295 + Interview Questions in Chemistry

1.	Give reasons for the following: (i) o-nitrophenol is more acidic than o-methoxyphenol. (ii) Butan-1-ol has a higher boiling point than diethyl ether. (iii) (CH3)3C−O−CH3 on reaction with HI gives (CH3)C−I and CH3−OH as the main products and not (CH3)3C−OH and CH3−I.
Answer» Give reasons for the following: (i) o-nitrophenol is more acidic than o-methoxyphenol. (ii) Butan-1-ol has a higher boiling point than diethyl ether. (iii) $(C H_{3})_{3} C - O - C H_{3}$ on reaction with HI gives $(C H_{3}) C - I$ and $C H_{3} - O H$ as the main products and not $(C H_{3})_{3} C - O H$ and $C H_{3} - I$ .

Discussion

2.	If 10^9 electrons move out of a body to another body every second, how much time is required to get a total charge of 1C on the other body?
Answer» If 10^9 electrons move out of a body to another body every second, how much time is required to get a total charge of 1C on the other body?

Discussion

3.	is alcoholic KOH IS A BULKY BAS
Answer» is alcoholic KOH IS A BULKY BAS

Discussion

4.	2. Cubic close packing (CCP) is ABC ABC type packing. The maximum number of atoms presentin one plane of this packing which are in contact with one atom are (1) 6 (2) 8 (3) 10 (4) 12
Answer» 2. Cubic close packing (CCP) is ABC ABC type packing. The maximum number of atoms presentin one plane of this packing which are in contact with one atom are (1) 6 (2) 8 (3) 10 (4) 12

Discussion

5.	In the Bohr model the electron of a hydrogen atom moves in a circular orbit of radius 5.310^ -11m with a speed of 2.210^ 6 m/s .find its frequency f and the current I in the orbit
Answer» In the Bohr model the electron of a hydrogen atom moves in a circular orbit of radius 5.310^ -11m with a speed of 2.210^ 6 m/s .find its frequency f and the current I in the orbit

Discussion

6.	Resonance structure of a molecule should not have Identical arrangement of atoms Nearly same energy content The same number of paired electrons Identical bonding
Answer» Resonance structure of a molecule should not have Identical arrangement of atoms Nearly same energy content The same number of paired electrons Identical bonding

Discussion

7.	8 g oxygen gas is expanded isothermally at 27circC from 2 dm3 to 8 dm3at a constant external pressure of 4 atm. If the magnitude of work done in this process is used in lifting body of mass 40 kg, the height in (metre) upto which the body can be lifted is (g=10 ms−2)
Answer» 8 g oxygen gas is expanded isothermally at $27^{c} i r c C$ from 2 $d m^{3}$ to 8 $d m^{3}$ at a constant external pressure of 4 atm. If the magnitude of work done in this process is used in lifting body of mass 40 kg, the height in (metre) upto which the body can be lifted is (g=10 $m s^{- 2}$ )

Discussion

8.	41.What happens if Trimerization of Propyne (C3H4)takes place ?
Answer» 41.What happens if Trimerization of Propyne (C3H4)takes place ?

Discussion

9.	Compound D can be
Answer» Compound D can be

Discussion

10.	According to Langmuir adsorption isotherm, the amount of gas adsorbed by the unit surface area is :[a, b, k and n are constants P= pressure of gas]
Answer» According to Langmuir adsorption isotherm, the amount of gas adsorbed by the unit surface area is : [a, b, k and n are constants P= pressure of gas]

Discussion

11.	Identify the effects in the following molecules among inductive , mesomeric and baker nathan effect ? Also tell the positions where these are experienced 1) C2H5Cl 2) CH3-CH=CH2 3) CH2=CH-CH=CH2 4) CH3-CH=CH-COCH3
Answer» Identify the effects in the following molecules among inductive , mesomeric and baker nathan effect ? Also tell the positions where these are experienced 1) C2H5Cl 2) CH3-CH=CH2 3) CH2=CH-CH=CH2 4) CH3-CH=CH-COCH3

Discussion

12.	The mass of CaCO3 required to react completely with 20 mL of 1.0 M HCL as per the reaction CaCO3+2HCl-->CaCl2+CO2+H2O
Answer» The mass of CaCO3 required to react completely with 20 mL of 1.0 M HCL as per the reaction CaCO3+2HCl-->CaCl2+CO2+H2O

Discussion

13.	7. How to attempt this type of ques.- Q.which of the following aqueous solutions has highest freezing point- a) 0.1 M NaCl b)0.1M BaCl2 c) 0.1M Al2(SO4)3 d)0.1M urea
Answer» 7. How to attempt this type of ques.- Q.which of the following aqueous solutions has highest freezing point- a) 0.1 M NaCl b)0.1M BaCl2 c) 0.1M Al2(SO4)3 d)0.1M urea

Discussion

14.	What is the plane of symmetry? What is the difference between molecular plane of symmetry and plane of symmetry?
Answer» What is the plane of symmetry? What is the difference between molecular plane of symmetry and plane of symmetry?

Discussion

15.	The correct order of bond angles (smallest first) for H2S,NH3,BF3 and SiH4 is:
Answer» The correct order of bond angles (smallest first) for $H_{2} S, N H_{3}, B F_{3}$ and $S i H_{4}$ is:

Discussion

16.	If the density of methanol is 0.793kg/l, what is its volume needed for making 2.5l of its 0.25M solution ?
Answer» If the density of methanol is 0.793kg/l, what is its volume needed for making 2.5l of its 0.25M solution ?

Discussion

17.	Tetrachloroethylenedoes not add chlorine quantitatively under ordinary conditions. However, when the same reaction is carried out in presence of aluminium chloride, addition occurs easily. The role of AlCl3 is
Answer» Tetrachloroethylenedoes not add chlorine quantitatively under ordinary conditions. However, when the same reaction is carried out in presence of aluminium chloride, addition occurs easily. The role of $A l C l_{3}$ is

Discussion

18.	The correct option representing a Freundlich adsorption isotherm is
Answer» The correct option representing a Freundlich adsorption isotherm is

Discussion

19.	A: iodine is a mild oxidising agent R: iodine can be used for treating sodium thiosulphate 1) both assertion and reason are true and the reason is the correct explanation of the assertion. 2) both assertion and reason are true but the reason is not the correct explanation of the assertion. 3) assertion is true statement but reason is false 4) both assertion and reason are false statements.
Answer» A: iodine is a mild oxidising agent R: iodine can be used for treating sodium thiosulphate 1) both assertion and reason are true and the reason is the correct explanation of the assertion. 2) both assertion and reason are true but the reason is not the correct explanation of the assertion. 3) assertion is true statement but reason is false 4) both assertion and reason are false statements.

Discussion

20.	Which of the following statements is true?
Answer» Which of the following statements is true?

Discussion

21.	what is iso electric paint?
Answer» what is iso electric paint?

Discussion

22.	product formed when lactone treated with aqueous sodium hydroxide solution
Answer» product formed when lactone treated with aqueous sodium hydroxide solution

Discussion

23.	41. [Nice(gly)2] shows two stereoisomers. Those are 1) geometrical 2) optical 3) both 4) no isomers
Answer» 41. [Nice(gly)2] shows two stereoisomers. Those are 1) geometrical 2) optical 3) both 4) no isomers

Discussion

24.	49. If 25ml of H2SO4 solution reacts completely with 1.06g of NA2CO3, what is normality of this acid solution?
Answer» 49. If 25ml of H2SO4 solution reacts completely with 1.06g of NA2CO3, what is normality of this acid solution?

Discussion

25.	Which of the following solutions has osmotic pressure near to that of equi-molal solution of K4[Fe(CN)6]?
Answer» Which of the following solutions has osmotic pressure near to that of equi-molal solution of $K_{4} [F e (C N)_{6}]$ ?

Discussion

26.	the no. of Carbin atoms present at lattice points and voids per unit cell of diamond respectivel
Answer» the no. of Carbin atoms present at lattice points and voids per unit cell of diamond respectivel

Discussion

27.	After some time number of radioactive nuclei of an isotope become constant at ABIn(2) where B is the half time and A is the rate at which radioactive isotope is produced. A is (when nuclei has become constant)
Answer» After some time number of radioactive nuclei of an isotope become constant at $\frac{A B}{I n (2)}$ where B is the half time and A is the rate at which radioactive isotope is produced. A is (when nuclei has become constant)

Discussion

28.	45. Why does salicylaldehyde does not give aldol condensation reaction (it does have alpha hydrogen I guess)?
Answer» 45. Why does salicylaldehyde does not give aldol condensation reaction (it does have alpha hydrogen I guess)?

Discussion

29.	Will Hana help the wounded man and wash him herself?
Answer» Will Hana help the wounded man and wash him herself?

Discussion

30.	Two liquids A and B mixed in 1:4 mole ratio to form an ideal solution.If pure liquid A and B exerts a pressure of 75mmHg and 22mmHg respectively, the vapour pressure of liquid A in the vapour phase would be
Answer» Two liquids A and B mixed in 1:4 mole ratio to form an ideal solution.If pure liquid A and B exerts a pressure of 75mmHg and 22mmHg respectively, the vapour pressure of liquid A in the vapour phase would be

Discussion

31.	why e/m ratio of anode rays depends upon nature of gas unlike cathode rays?
Answer» why e/m ratio of anode rays depends upon nature of gas unlike cathode rays?

Discussion

32.	Grignard reagents cannot be used for the preparation of ketones from acid chlorides.Expain.
Answer» Grignard reagents cannot be used for the preparation of ketones from acid chlorides.Expain.

Discussion

33.	{ A: }N(SiH_3)_3 is }sp^2 hybridised. }}{R: Lone pair of electron is involved in }pπ-pπ} bonding.
Answer» { A: }N(SiH_3)_3 is }sp^2 hybridised. }}{R: Lone pair of electron is involved in }pπ-pπ} bonding.

Discussion

34.	The length of a given cylindrical wire is increased by 100%. Due to the consequent decrease in the diameter, the change in the resistance of the wire will be
Answer» The length of a given cylindrical wire is increased by $100 % .$ Due to the consequent decrease in the diameter, the change in the resistance of the wire will be

Discussion

35.	Let hydrolysis constant (Kh) of NH4+ be y. Then equilibrium constant (Ka) for conjugate acid of NH3 at 25°C is :(1) 1 x 10-14 y ( 1 by y into 10 to the power - 14)(2) 10–14(3) y(4) y × 10–14
Answer» Let hydrolysis constant (Kh) of NH4+ be y. Then equilibrium constant (Ka) for conjugate acid of NH3 at 25°C is : (1) 1 x 10-14 y ( 1 by y into 10 to the power - 14) (2) 10–14 (3) y (4) y × 10–14

Discussion

36.	What is the Probablity of getting Head by tossing a 2 rupee Coin?
Answer» What is the Probablity of getting Head by tossing a 2 rupee Coin?

Discussion

37.	250 mL of 0.5 M NaOH was added to 500 mL of 1M HCl.The number of unreacted HCl molecules in the solution after compelete reaction is x×1021. The value of x to the nearest integer is Take(NA=6.022×1023)
Answer» 250 mL of 0.5 M $N a O H$ was added to 500 mL of 1M $H C l$ .The number of unreacted $H C l$ molecules in the solution after compelete reaction is $x \times 10^{21}$ . The value of x to the nearest integer is Take ( $N_{A} = 6.022 \times 10^{23}$ )

Discussion

38.	For 10 min each, at 27 ∘C from two identical holes, nitrogen and an unknown gas are leaked into a common vessel of 3 L capacity. The resulting pressure is 4.18 bar and the mixture contains 0.4 mole of nitrogen gas. Thus, molar mass (in g) of the unknown gas is:
Answer» For $10$ min each, at $27^{\circ} C$ from two identical holes, nitrogen and an unknown gas are leaked into a common vessel of $3 L$ capacity. The resulting pressure is $4.18$ bar and the mixture contains $0.4$ mole of nitrogen gas. Thus, molar mass $(in g)$ of the unknown gas is:

Discussion

39.	In an experiment to measure the speed of light by Fizeau's apparatus, following data are used: Distance between the mirrors = 12.0 km, Number of teeth in the wheel = 180. Find the minimum angular speed of the wheel for which the image is not seen.
Answer» In an experiment to measure the speed of light by Fizeau's apparatus, following data are used: Distance between the mirrors = 12.0 km, Number of teeth in the wheel = 180. Find the minimum angular speed of the wheel for which the image is not seen.

39.

In an experiment to measure the speed of light by Fizeau's apparatus, following data are used: Distance between the mirrors = 12.0 km, Number of teeth in the wheel = 180. Find the minimum angular speed of the wheel for which the image is not seen.

Answer»

In an experiment to measure the speed of light by Fizeau's apparatus, following data are used:

Distance between the mirrors = 12.0 km,

Number of teeth in the wheel = 180.

Find the minimum angular speed of the wheel for which the image is not seen.

Discussion

40.	An ice cube of mass 0.1 kg at 0∘ C is placed in an isolated container which is at 227∘C. The specific heat s of the container varies with temperature T according to the empirical relation s = A + BT, where A = 100 calkg−K and B = 2×10−2calkg−K2. If the final temperature of the container is 27∘, determine the mass (in Kg) of the container. (Latent heat of fusion for water = 8×104calkg, specific heat of water = 103calkg−K. Answer upto 2 decimal places.
Answer» An ice cube of mass 0.1 kg at $0^{\circ}$ C is placed in an isolated container which is at $227^{\circ}$ C. The specific heat s of the container varies with temperature T according to the empirical relation s = A + BT, where A = 100 $\frac{c a l}{k g - K}$ and B = $2 \times 10^{- 2} \frac{c a l}{k g - K^{2}}$ . If the final temperature of the container is $27^{\circ}$ , determine the mass (in Kg) of the container. (Latent heat of fusion for water = $8 \times 10^{4} \frac{c a l}{k g}$ , specific heat of water = $10^{3} \frac{c a l}{k g - K}$ . Answer upto 2 decimal places.

Discussion

41.	Cotton is an example of:
Answer» Cotton is an example of:

Discussion

42.	Full explanation of Henry's law
Answer» Full explanation of Henry's law

Discussion

43.	The hypothetical complex chlorodiaquatriamminecobalt(III) chloride can be represented as :
Answer» The hypothetical complex chlorodiaquatriamminecobalt(III) chloride can be represented as :

Discussion

44.	15. the hardest substance among the following is A. Be2C B. Graphite C. Titanium D. SiC E. B4C (kindly explain why it is the hardest than the others by comparing with the structures of the Other element given in the options and also explain the structural modification it has, to be the hardest substance ,kindly provide the complete solution)
Answer» 15. the hardest substance among the following is A. Be2C B. Graphite C. Titanium D. SiC E. B4C (kindly explain why it is the hardest than the others by comparing with the structures of the Other element given in the options and also explain the structural modification it has, to be the hardest substance ,kindly provide the complete solution)

Discussion

45.	In acidic medium, dichromate ions oxidise ferrous sulphate to ferric sulphate and itself gets reduced to Cr3+ ions. Write a balanced equation to represent this redox reaction.(Use ion electron method)
Answer» In acidic medium, dichromate ions oxidise ferrous sulphate to ferric sulphate and itself gets reduced to Cr3+ ions. Write a balanced equation to represent this redox reaction.(Use ion electron method)

Discussion

46.	(a) How would you account for the following: (i) The chemistry of actinoids is more complicated as compared to lanthanoids. (ii) Transition metals form complex compounds. (b) Complete the following equation: 2MnO4−+6H++SO32−→
Answer» (a) How would you account for the following: (i) The chemistry of actinoids is more complicated as compared to lanthanoids. (ii) Transition metals form complex compounds. (b) Complete the following equation: $2 {M n O_{4}}^{-} + 6 H^{+} + {S O_{3}}^{2 -} \to$

46.

(a) How would you account for the following: (i) The chemistry of actinoids is more complicated as compared to lanthanoids. (ii) Transition metals form complex compounds. (b) Complete the following equation: 2MnO4−+6H++SO32−→

Answer»

(a) How would you account for the following:

(i) The chemistry of actinoids is more complicated as compared to lanthanoids.

(ii) Transition metals form complex compounds.

(b) Complete the following equation:

$2 {M n O_{4}}^{-} + 6 H^{+} + {S O_{3}}^{2 -} \to$

Discussion

47.	N2+3H2=2NH3. If 7g of nitrogen disappears in 5min find the weight of ammonia produced in 10 min.by assuming uniform rate
Answer» N2+3H2=2NH3. If 7g of nitrogen disappears in 5min find the weight of ammonia produced in 10 min.by assuming uniform rate

Discussion

48.	what isthe hybridisation of chromium in \lbrack CrF_6\rbrack^{3-
Answer» what isthe hybridisation of chromium in \lbrack CrF_6\rbrack^{3-

Discussion

49.	How free radical mechanism related to sandmeyer reaction
Answer» How free radical mechanism related to sandmeyer reaction

Discussion

50.	Calculate the maximum work done (in cal) when the pressure on 10 grams of hydrogen is reduced from 20 to 1 atm at a constant temperature of 273 K if the gas behaves ideally.
Answer» Calculate the maximum work done (in $c a l$ ) when the pressure on 10 grams of hydrogen is reduced from $20$ to $1 a t m$ at a constant temperature of $273 K$ if the gas behaves ideally.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Give reasons for the following: (i) o-nitrophenol is more acidic than o-methoxyphenol. (ii) Butan-1-ol has a higher boiling point than diethyl ether. (iii) (CH3)3C−O−CH3 on reaction with HI gives (CH3)C−I and CH3−OH as the main products and not (CH3)3C−OH and CH3−I.

If 10^9 electrons move out of a body to another body every second, how much time is required to get a total charge of 1C on the other body?

is alcoholic KOH IS A BULKY BAS

2. Cubic close packing (CCP) is ABC ABC type packing. The maximum number of atoms presentin one plane of this packing which are in contact with one atom are (1) 6 (2) 8 (3) 10 (4) 12

In the Bohr model the electron of a hydrogen atom moves in a circular orbit of radius 5.3*10^ -11m with a speed of 2.2*10^ 6 m/s .find its frequency f and the current I in the orbit

Resonance structure of a molecule should not have Identical arrangement of atoms Nearly same energy content The same number of paired electrons Identical bonding

8 g oxygen gas is expanded isothermally at 27circC from 2 dm3 to 8 dm3at a constant external pressure of 4 atm. If the magnitude of work done in this process is used in lifting body of mass 40 kg, the height in (metre) upto which the body can be lifted is (g=10 ms−2)

41.What happens if Trimerization of Propyne (C3H4)takes place ?

Compound D can be

According to Langmuir adsorption isotherm, the amount of gas adsorbed by the unit surface area is :[a, b, k and n are constants P= pressure of gas]

Identify the effects in the following molecules among inductive , mesomeric and baker nathan effect ? Also tell the positions where these are experienced 1) C2H5Cl 2) CH3-CH=CH2 3) CH2=CH-CH=CH2 4) CH3-CH=CH-COCH3

The mass of CaCO3 required to react completely with 20 mL of 1.0 M HCL as per the reaction CaCO3+2HCl-->CaCl2+CO2+H2O

7. How to attempt this type of ques.- Q.which of the following aqueous solutions has highest freezing point- a) 0.1 M NaCl b)0.1M BaCl2 c) 0.1M Al2(SO4)3 d)0.1M urea

What is the plane of symmetry? What is the difference between molecular plane of symmetry and plane of symmetry?

The correct order of bond angles (smallest first) for H2S,NH3,BF3 and SiH4 is:

If the density of methanol is 0.793kg/l, what is its volume needed for making 2.5l of its 0.25M solution ?

Tetrachloroethylenedoes not add chlorine quantitatively under ordinary conditions. However, when the same reaction is carried out in presence of aluminium chloride, addition occurs easily. The role of AlCl3 is

The correct option representing a Freundlich adsorption isotherm is

Which of the following statements is true?

what is iso electric paint?

product formed when lactone treated with aqueous sodium hydroxide solution

41. [Nice(gly)2] shows two stereoisomers. Those are 1) geometrical 2) optical 3) both 4) no isomers

49. If 25ml of H2SO4 solution reacts completely with 1.06g of NA2CO3, what is normality of this acid solution?

Which of the following solutions has osmotic pressure near to that of equi-molal solution of K4[Fe(CN)6]?

the no. of Carbin atoms present at lattice points and voids per unit cell of diamond respectivel

After some time number of radioactive nuclei of an isotope become constant at ABIn(2) where B is the half time and A is the rate at which radioactive isotope is produced. A is (when nuclei has become constant)

45. Why does salicylaldehyde does not give aldol condensation reaction (it does have alpha hydrogen I guess)?

Will Hana help the wounded man and wash him herself?

Two liquids A and B mixed in 1:4 mole ratio to form an ideal solution.If pure liquid A and B exerts a pressure of 75mmHg and 22mmHg respectively, the vapour pressure of liquid A in the vapour phase would be

why e/m ratio of anode rays depends upon nature of gas unlike cathode rays?

Grignard reagents cannot be used for the preparation of ketones from acid chlorides.Expain.

{ A: }N(SiH_3)_3 is }sp^2 hybridised. }}{R: Lone pair of electron is involved in }pπ-pπ} bonding.

The length of a given cylindrical wire is increased by 100%. Due to the consequent decrease in the diameter, the change in the resistance of the wire will be

Let hydrolysis constant (Kh) of NH4+ be y. Then equilibrium constant (Ka) for conjugate acid of NH3 at 25°C is :(1) 1 x 10-14 y ( 1 by y into 10 to the power - 14)(2) 10–14(3) y(4) y × 10–14

What is the Probablity of getting Head by tossing a 2 rupee Coin?

250 mL of 0.5 M NaOH was added to 500 mL of 1M HCl.The number of unreacted HCl molecules in the solution after compelete reaction is x×1021. The value of x to the nearest integer is Take(NA=6.022×1023)

For 10 min each, at 27 ∘C from two identical holes, nitrogen and an unknown gas are leaked into a common vessel of 3 L capacity. The resulting pressure is 4.18 bar and the mixture contains 0.4 mole of nitrogen gas. Thus, molar mass (in g) of the unknown gas is:

In an experiment to measure the speed of light by Fizeau's apparatus, following data are used: Distance between the mirrors = 12.0 km, Number of teeth in the wheel = 180. Find the minimum angular speed of the wheel for which the image is not seen.

Cotton is an example of:

Full explanation of Henry's law

The hypothetical complex chlorodiaquatriamminecobalt(III) chloride can be represented as :

In acidic medium, dichromate ions oxidise ferrous sulphate to ferric sulphate and itself gets reduced to Cr3+ ions. Write a balanced equation to represent this redox reaction.(Use ion electron method)

(a) How would you account for the following: (i) The chemistry of actinoids is more complicated as compared to lanthanoids. (ii) Transition metals form complex compounds. (b) Complete the following equation: 2MnO4−+6H++SO32−→

N2+3H2=2NH3. If 7g of nitrogen disappears in 5min find the weight of ammonia produced in 10 min.by assuming uniform rate

what isthe hybridisation of chromium in \lbrack CrF_6\rbrack^{3-

How free radical mechanism related to sandmeyer reaction

Calculate the maximum work done (in cal) when the pressure on 10 grams of hydrogen is reduced from 20 to 1 atm at a constant temperature of 273 K if the gas behaves ideally.

In the Bohr model the electron of a hydrogen atom moves in a circular orbit of radius 5.310^ -11m with a speed of 2.210^ 6 m/s .find its frequency f and the current I in the orbit