46295 + Interview Questions in Chemistry

1.	H3C−C≡CHCH3MgBr−−−−−−→(A)+Gas↑ (A)i. CO2−−−−−−−→ii. H2O/H+(B) (B) will be:
Answer» $H_{3} C - C \equiv C H C H_{3} M g B r - ----- \to (A) + Gas ↑$ $(A) i . C O_{2} - ------ \to i i . H_{2} O / H^{+} (B)$ (B) will be:

Discussion

2.	When LiNO3 is heated, the magnitude of change in the oxidation number of N is ___
Answer» When $L i N O_{3}$ is heated, the magnitude of change in the oxidation number of $N$ is ___

Discussion

3.	Consider an electrochemical cell in which the following reaction occurs : Fe2+(aq)+Ag+(aq)→Ag(s)+Fe3+(aq) Then how many of following changes will decrease the cell voltage: (i) Decrease the [Ag+] (ii) Increase in [Fe3+] (III) Increase the amount of Ag
Answer» Consider an electrochemical cell in which the following reaction occurs : $F e^{2 +} (a q) + A g^{+} (a q) \to A g (s) + F e^{3 +} (a q)$ Then how many of following changes will decrease the cell voltage: (i) Decrease the $[A g^{+}]$ (ii) Increase in $[F e^{3 +}]$ (III) Increase the amount of $A g$

Discussion

4.	Select the species which is not aromatic.
Answer» Select the species which is not aromatic.

Discussion

5.	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

6.	In the video, they said that 1kwh is equal to 3.6109 J But, in the question and answer, they said that 1 kwh=3.6106 J. So, Please tell me which is correct?
Answer» In the video, they said that 1kwh is equal to 3.6109 J But, in the question and answer, they said that 1 kwh=3.6106 J. So, Please tell me which is correct?

Discussion

7.	The most abundant elements by mass in the body of a healthy human adult are oxygen (61.4%), carbon (22.9%), hydrogen (10.0%) and Nitrogen (2.6%). The weight which a 75 kg person would gain if all the 1H atoms are replaced by 2H atoms is:
Answer» The most abundant elements by mass in the body of a healthy human adult are oxygen (61.4%), carbon (22.9%), hydrogen (10.0%) and Nitrogen (2.6%). The weight which a $75 kg$ person would gain if all the $^{1} H$ atoms are replaced by $^{2} H$ atoms is:

Discussion

8.	How will you convert ethanoic acid into methanamine?
Answer» How will you convert ethanoic acid into methanamine?

Discussion

9.	Discuss the trend of the following:- (1) Thermal stability of carbonates of group 2 elements (2) The solubility and the nature of oxides of group 2 elements.
Answer» Discuss the trend of the following:- (1) Thermal stability of carbonates of group 2 elements (2) The solubility and the nature of oxides of group 2 elements.

Discussion

10.	What are the characteristics of s, p ,d, f block elements?
Answer» What are the characteristics of s, p ,d, f block elements?

Discussion

11.	How do we calculate the number of electrons in a compound ?
Answer» How do we calculate the number of electrons in a compound ?

Discussion

12.	In the manufacture of Sulphuric acid ,the key step is the catalytic oxidation of sulphur dioxide with Oxygen to give:
Answer» In the manufacture of Sulphuric acid ,the key step is the catalytic oxidation of sulphur dioxide with Oxygen to give:

Discussion

13.	From the following, no. of compounds which do not hydrolyze NF3,NCl3,PCl3,PCl5,CCl4,SiCl4,BiCl3,NaCl,FeCl3___
Answer» From the following, no. of compounds which do not hydrolyze $N F_{3}, N C l_{3}, P C l_{3}, P C l_{5}, C C l_{4}, S i C l_{4}, B i C l_{3}, N a C l, F e C l_{3}$ ___

Discussion

14.	Which of the following is the third step for the following input? Input: lest of a cobalt seat in the
Answer» Which of the following is the third step for the following input? Input: lest of a cobalt seat in the

14.

Which of the following is the third step for the following input? Input: lest of a cobalt seat in the

Answer»

Which of the following is the third step for the following input?

Input: lest of a cobalt seat in the

Discussion

15.	Which of the following is not an example of +I group?
Answer» Which of the following is not an example of $+ I$ group?

Discussion

16.	The inert gases have electronic configuration of:
Answer» The inert gases have electronic configuration of:

Discussion

17.	What is the relation between ∆H and ∆U?
Answer» What is the relation between ∆H and ∆U?

Discussion

18.	Rank the following free radicals in order of decreasing stability.
Answer» Rank the following free radicals in order of decreasing stability.

Discussion

19.	Carbon shows tetravalency by undergoing:
Answer» Carbon shows tetravalency by undergoing:

Discussion

20.	DNA has genetic properties was revealed for the first time by
Answer» DNA has genetic properties was revealed for the first time by

Discussion

21.	Alkyl radical stability increases as we proceed from:
Answer» Alkyl radical stability increases as we proceed from:

Discussion

22.	What is the effective number of FCC? Definition for coordination number?
Answer» What is the effective number of FCC? Definition for coordination number?

Discussion

23.	Calculate the mole fraction of ethylene glycol and water in a solution containing 20% of C2H6O2 by mass.
Answer» Calculate the mole fraction of ethylene glycol and water in a solution containing 20% of C₂H₆O₂by mass.

Discussion

24.	According to the priority order alkanes are given more importantance than alkylhalalkyl.so How can one .Write the name as 2-chloro3-methyl butane.why can't we write it as 3-chloro2-methyl butane?
Answer» According to the priority order alkanes are given more importantance than alkylhalalkyl.so How can one .Write the name as 2-chloro3-methyl butane.why can't we write it as 3-chloro2-methyl butane?

Discussion

25.	The value of van der waal's constant 'a' for the gases O2,N2,NH3 are 1.360,1.390,4.170 L2 atm mol−2 respectively. The gas which can most easily be liquified is
Answer» The value of van der waal's constant 'a' for the gases $O_{2}, N_{2}, N H_{3}$ are $1.360, 1.390, 4.170$ $L^{2} a t m m o l^{- 2}$ respectively. The gas which can most easily be liquified is

Discussion

26.	The enthalpy of vaporisation of liquid diethyl ether is 26.0 kJ mol−1 at its boiling point 35.0oC. Calculate △ S for conversion of vapour to liquid at 35.0oC in JK−1mol−1.
Answer» The enthalpy of vaporisation of liquid diethyl ether is $26.0 k J m o l^{- 1}$ at its boiling point ${35.0}^{o} C .$ Calculate $△ S$ for conversion of vapour to liquid at ${35.0}^{o} C$ in $J K^{- 1} m o l^{- 1}$ .

Discussion

27.	Naphthalene dissolves in which of the solvent?
Answer» Naphthalene dissolves in which of the solvent?

Discussion

28.	A carnot engine is taking 700 cal from source and is rejecting 500 cal to the sink in each cycle. What is the temperature of sink if the source temperature is 150o C .
Answer» A carnot engine is taking 700 cal from source and is rejecting 500 cal to the sink in each cycle. What is the temperature of sink if the source temperature is 150^o C .

Discussion

29.	Which of the following is the correct order of stability of the following carbocations?
Answer» Which of the following is the correct order of stability of the following carbocations?

Discussion

30.	The salt used for performing ‘bead’ test in qualitative inorganic analysis is:
Answer» The salt used for performing ‘bead’ test in qualitative inorganic analysis is:

Discussion

31.	In which of the following solvent, KI has highest solubility:- (E = dielectric constant )
Answer» In which of the following solvent, KI has highest solubility:- (E = dielectric constant )

Discussion

32.	Look at the following reaction. Comment on X; is it oxidizing or reducing? X+Hydrochloric acid→Salt+Water+Chlorine ___
Answer» Look at the following reaction. Comment on X; is it oxidizing or reducing? $X + H y d r o c h l o r i c a c i d \to S a l t + W a t e r + C h l o r i n e$ ___

32.

Look at the following reaction. Comment on X; is it oxidizing or reducing? X+Hydrochloric acid→Salt+Water+Chlorine ___

Answer»

Look at the following reaction. Comment on X; is it oxidizing or reducing?

$X + H y d r o c h l o r i c a c i d \to S a l t + W a t e r + C h l o r i n e$

___

Discussion

33.	Which of the following is not an organic compound?
Answer» Which of the following is not an organic compound?

Discussion

34.	In the Duma’s method for the estimation of nitrogen, 0.84 g of an organic compound gave 448 mL of nitrogen at STP. The % of N in the compound is:
Answer» In the Duma’s method for the estimation of nitrogen, 0.84 g of an organic compound gave 448 mL of nitrogen at STP. The % of N in the compound is:

Discussion

35.	Heat of hydrogenation of cyclohexene is x1 and that of benzene is x2. Hence, resonance energy is:
Answer» Heat of hydrogenation of cyclohexene is $x_{1}$ and that of benzene is $x_{2}$ . Hence, resonance energy is:

Discussion

36.	The following is used for metal cleaning and finishing
Answer» The following is used for metal cleaning and finishing

Discussion

37.	Increasing order of stability among the three main conformations (i.e., eclipse, anti, gauche) of 2-fluoroethanol is:
Answer» Increasing order of stability among the three main conformations (i.e., eclipse, anti, gauche) of 2-fluoroethanol is:

Discussion

38.	Which of the following gives most stable carbocation on dehydration?
Answer» Which of the following gives most stable carbocation on dehydration?

Discussion

39.	Colligative property measurement is one of the techniques used in the measurement of chemical quantitates with reasonably accuracy. If a 40.65 gm sample of K2SO4 and BaSO4 is dissolved in 900 gm of pure water to form a solution ‘A’ at 57∘C, its vapour pressure is found to be 39.6 torr while vapour pressure of pure water at 57∘C is 40 torr. Density of solution A is 1.24 g/ml. In a different experiment when small amount of pure BaSO4 is mixed with water at 57∘C it gives the osmotic rise of 4.05×10−5 atm. (r = 0.082 Lt-atom/mol - K ; K = 39, Ba = 137, S = 32, O = 16) Percentage of K2SO4 in the sample is
Answer» Colligative property measurement is one of the techniques used in the measurement of chemical quantitates with reasonably accuracy. If a 40.65 gm sample of $K_{2} S O_{4}$ and $B a S O_{4}$ is dissolved in 900 gm of pure water to form a solution ‘A’ at $57^{\circ} C$ , its vapour pressure is found to be 39.6 torr while vapour pressure of pure water at $57^{\circ} C$ is 40 torr. Density of solution A is 1.24 g/ml. In a different experiment when small amount of pure $B a S O_{4}$ is mixed with water at $57^{\circ} C$ it gives the osmotic rise of $4.05 \times 10^{- 5} atm$ . (r = 0.082 Lt-atom/mol - K ; K = 39, Ba = 137, S = 32, O = 16) Percentage of $K_{2} S O_{4}$ in the sample is

39.

Colligative property measurement is one of the techniques used in the measurement of chemical quantitates with reasonably accuracy. If a 40.65 gm sample of K2SO4 and BaSO4 is dissolved in 900 gm of pure water to form a solution ‘A’ at 57∘C, its vapour pressure is found to be 39.6 torr while vapour pressure of pure water at 57∘C is 40 torr. Density of solution A is 1.24 g/ml. In a different experiment when small amount of pure BaSO4 is mixed with water at 57∘C it gives the osmotic rise of 4.05×10−5 atm. (r = 0.082 Lt-atom/mol - K ; K = 39, Ba = 137, S = 32, O = 16) Percentage of K2SO4 in the sample is

Answer»

Colligative property measurement is one of the techniques used in the measurement of chemical quantitates with reasonably accuracy.

If a 40.65 gm sample of $K_{2} S O_{4}$ and $B a S O_{4}$ is dissolved in 900 gm of pure water to form a solution ‘A’ at $57^{\circ} C$ , its vapour pressure is found to be 39.6 torr while vapour pressure of pure water at $57^{\circ} C$ is 40 torr. Density of solution A is 1.24 g/ml. In a different experiment when small amount of pure $B a S O_{4}$ is mixed with water at $57^{\circ} C$ it gives the osmotic rise of $4.05 \times 10^{- 5} atm$ . (r = 0.082 Lt-atom/mol - K ; K = 39, Ba = 137, S = 32, O = 16)

Percentage of $K_{2} S O_{4}$ in the sample is

Discussion

40.	Pent-4-yn-2-ol has the structure:
Answer» Pent-4-yn-2-ol has the structure:

Discussion

41.	The cost of electrical energy to deposit 2.0g from molten calcium chloride solution is 10 rupees.The amount to be spend to liberate 11.2L of oxygen is
Answer» The cost of electrical energy to deposit 2.0g from molten calcium chloride solution is 10 rupees.The amount to be spend to liberate 11.2L of oxygen is

Discussion

42.	Fe is made passive by -
Answer» Fe is made passive by -

Discussion

43.	QUESTION 2.33 19.5 g of CH2FCOOH is dissolved in 500g of water. The depression in the freezing point of water observed in 1.0 C. Calculate the van't Hoff factor and dissociation constant of fluoroacetic acid. Kf=1.86 K kg mol−1
Answer» QUESTION 2.33 19.5 g of $C H_{2} F C O O H$ is dissolved in 500g of water. The depression in the freezing point of water observed in 1.0 C. Calculate the van't Hoff factor and dissociation constant of fluoroacetic acid. $K_{f} = 1.86 K k g m o l^{- 1}$

43.

QUESTION 2.33 19.5 g of CH2FCOOH is dissolved in 500g of water. The depression in the freezing point of water observed in 1.0 C. Calculate the van't Hoff factor and dissociation constant of fluoroacetic acid. Kf=1.86 K kg mol−1

Answer»

QUESTION 2.33

19.5 g of $C H_{2} F C O O H$ is dissolved in 500g of water. The depression in the freezing point of water observed in 1.0 C. Calculate the van't Hoff factor and dissociation constant of fluoroacetic acid.
$K_{f} = 1.86 K k g m o l^{- 1}$

Discussion

44.	IUPAC name of (CH3)2CH - N(C2H5)2
Answer» IUPAC name of (CH₃)₂CH - N(C₂H₅)₂

Discussion

45.	How many enantiomeric pairs are produced by the monochlorination of 2-methylbutane?
Answer» How many enantiomeric pairs are produced by the monochlorination of 2-methylbutane?

Discussion

46.	Consider the following molecule: Calculate value of p/q, here p and q are total number of dπ−pπ bonds and total number of sp3 hybridised atoms respectively in given molecule.
Answer» Consider the following molecule: Calculate value of p/q, here p and q are total number of $d π - p π$ bonds and total number of $s p^{3}$ hybridised atoms respectively in given molecule.

Discussion

47.	The lanthanide that would show colour is:
Answer» The lanthanide that would show colour is:

Discussion

48.	Which of the following compounds will exhibit cis-trans (geometrical) isomerism?
Answer» Which of the following compounds will exhibit cis-trans (geometrical) isomerism?

Discussion

49.	H2O2→H2O+O2 The rate constant of this reaction is 2×10−2 min−1 (at certain temperature) and reaction is started with 0.5 M concentration of H2O2, after 23.03 min the reaction was suddenly stopped by lowering the temperature and remaining H2O2 was completely reacted with NaOCl, if number of moles of O2 produced in second reaction is 1x. Find x. (Given : NaOCl+H2O2→O2+NaCl+H2Olog1.5=0.2)
Answer» $H_{2} O_{2} \to H_{2} O + O_{2}$ The rate constant of this reaction is $2 \times 10^{- 2} m i n^{- 1}$ (at certain temperature) and reaction is started with $0.5 M$ concentration of $H_{2} O_{2}$ , after $23.03 m i n$ the reaction was suddenly stopped by lowering the temperature and remaining $H_{2} O_{2}$ was completely reacted with $N a O C l$ , if number of moles of $O_{2}$ produced in second reaction is $\frac{1}{x}$ . Find $x$ . (Given : $N a O C l + H_{2} O_{2} \to O_{2} + N a C l + H_{2} O$ $l o g 1.5 = 0.2$ )

Discussion

50.	Predict all the alkanes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene : 1-bromo-1-menthylcyclohexane 2 -chloro-2-methylbutane 3-bromo- 2,2,3-Trimethylpentane.
Answer» Predict all the alkanes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene : 1-bromo-1-menthylcyclohexane 2 -chloro-2-methylbutane 3-bromo- 2,2,3-Trimethylpentane.

50.

Predict all the alkanes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene : 1-bromo-1-menthylcyclohexane 2 -chloro-2-methylbutane 3-bromo- 2,2,3-Trimethylpentane.

Answer»

Predict all the alkanes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene :

1-bromo-1-menthylcyclohexane

2 -chloro-2-methylbutane

3-bromo- 2,2,3-Trimethylpentane.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

H3C−C≡CHCH3MgBr−−−−−−→(A)+Gas↑ (A)i. CO2−−−−−−−→ii. H2O/H+(B) (B) will be:

When LiNO3 is heated, the magnitude of change in the oxidation number of N is ___

Consider an electrochemical cell in which the following reaction occurs : Fe2+(aq)+Ag+(aq)→Ag(s)+Fe3+(aq) Then how many of following changes will decrease the cell voltage: (i) Decrease the [Ag+] (ii) Increase in [Fe3+] (III) Increase the amount of Ag

Select the species which is not aromatic.

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 video, they said that 1kwh is equal to 3.6*109 J But, in the question and answer, they said that 1 kwh=3.6*106 J. So, Please tell me which is correct?

The most abundant elements by mass in the body of a healthy human adult are oxygen (61.4%), carbon (22.9%), hydrogen (10.0%) and Nitrogen (2.6%). The weight which a 75 kg person would gain if all the 1H atoms are replaced by 2H atoms is:

How will you convert ethanoic acid into methanamine?

Discuss the trend of the following:- (1) Thermal stability of carbonates of group 2 elements (2) The solubility and the nature of oxides of group 2 elements.

What are the characteristics of s, p ,d, f block elements?

How do we calculate the number of electrons in a compound ?

In the manufacture of Sulphuric acid ,the key step is the catalytic oxidation of sulphur dioxide with Oxygen to give:

From the following, no. of compounds which do not hydrolyze NF3,NCl3,PCl3,PCl5,CCl4,SiCl4,BiCl3,NaCl,FeCl3___

Which of the following is the third step for the following input? Input: lest of a cobalt seat in the

Which of the following is not an example of +I group?

The inert gases have electronic configuration of:

What is the relation between ∆H and ∆U?

Rank the following free radicals in order of decreasing stability.

Carbon shows tetravalency by undergoing:

DNA has genetic properties was revealed for the first time by

Alkyl radical stability increases as we proceed from:

What is the effective number of FCC? Definition for coordination number?

Calculate the mole fraction of ethylene glycol and water in a solution containing 20% of C2H6O2 by mass.

According to the priority order alkanes are given more importantance than alkylhalalkyl.so How can one .Write the name as 2-chloro3-methyl butane.why can't we write it as 3-chloro2-methyl butane?

The value of van der waal's constant 'a' for the gases O2,N2,NH3 are 1.360,1.390,4.170 L2 atm mol−2 respectively. The gas which can most easily be liquified is

The enthalpy of vaporisation of liquid diethyl ether is 26.0 kJ mol−1 at its boiling point 35.0oC. Calculate △ S for conversion of vapour to liquid at 35.0oC in JK−1mol−1.

Naphthalene dissolves in which of the solvent?

A carnot engine is taking 700 cal from source and is rejecting 500 cal to the sink in each cycle. What is the temperature of sink if the source temperature is 150o C .

Which of the following is the correct order of stability of the following carbocations?

The salt used for performing ‘bead’ test in qualitative inorganic analysis is:

In which of the following solvent, KI has highest solubility:- (E = dielectric constant )

Look at the following reaction. Comment on X; is it oxidizing or reducing? X+Hydrochloric acid→Salt+Water+Chlorine ___

Which of the following is not an organic compound?

In the Duma’s method for the estimation of nitrogen, 0.84 g of an organic compound gave 448 mL of nitrogen at STP. The % of N in the compound is:

Heat of hydrogenation of cyclohexene is x1 and that of benzene is x2. Hence, resonance energy is:

The following is used for metal cleaning and finishing

Increasing order of stability among the three main conformations (i.e., eclipse, anti, gauche) of 2-fluoroethanol is:

Which of the following gives most stable carbocation on dehydration?

Pent-4-yn-2-ol has the structure:

The cost of electrical energy to deposit 2.0g from molten calcium chloride solution is 10 rupees.The amount to be spend to liberate 11.2L of oxygen is

Fe is made passive by -

QUESTION 2.33 19.5 g of CH2FCOOH is dissolved in 500g of water. The depression in the freezing point of water observed in 1.0 C. Calculate the van't Hoff factor and dissociation constant of fluoroacetic acid. Kf=1.86 K kg mol−1

IUPAC name of (CH3)2CH - N(C2H5)2

How many enantiomeric pairs are produced by the monochlorination of 2-methylbutane?

Consider the following molecule: Calculate value of p/q, here p and q are total number of dπ−pπ bonds and total number of sp3 hybridised atoms respectively in given molecule.

The lanthanide that would show colour is:

Which of the following compounds will exhibit cis-trans (geometrical) isomerism?

Predict all the alkanes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene : 1-bromo-1-menthylcyclohexane 2 -chloro-2-methylbutane 3-bromo- 2,2,3-Trimethylpentane.

In the video, they said that 1kwh is equal to 3.6109 J But, in the question and answer, they said that 1 kwh=3.6106 J. So, Please tell me which is correct?