46295 + Interview Questions in Chemistry

1.	61.Molar ratio of Na2SO3 and H2O is 1:7 in Na2SO3.xH2O Hence their mass of percentage is A)12.5:87.5 B)87.5:12.5 C)50:50 D)75:25
Answer» 61.Molar ratio of Na2SO3 and H2O is 1:7 in Na2SO3.xH2O Hence their mass of percentage is A)12.5:87.5 B)87.5:12.5 C)50:50 D)75:25

Discussion

2.	Ch3br +c2h5mgbr--> product AProduct A is PropaneEthaneButanePentane
Answer» Ch3br +c2h5mgbr--> product A Product A is Propane Ethane Butane Pentane

Discussion

3.	Comment on the statement that elements of the first transition series possess many properties different from those of heavier transition elements.
Answer» Comment on the statement that elements of the first transition series possess many properties different from those of heavier transition elements.

Discussion

4.	For which of the following reactions ΔHreaction is equal to ΔHformation
Answer» For which of the following reactions $Δ H_{r e a c t i o n}$ is equal to $Δ H_{f o r m a t i o n}$

Discussion

5.	A compound (A) when treated with one mole of CH3MgBr in ether followed by hydrolysis gives product (B) which upon treatment with conc. H2SO4 furnishes a olefin. Reductive ozonolysis of said olefin produces a ketone which gives positive iodoform test. Structure of A is:
Answer» A compound $(A)$ when treated with one mole of $C H_{3} M g B r$ in ether followed by hydrolysis gives product $(B)$ which upon treatment with conc. $H_{2} S O_{4}$ furnishes a olefin. Reductive ozonolysis of said olefin produces a ketone which gives positive iodoform test. Structure of $A$ is:

Discussion

6.	Why for constructive interference Maximum Intensity is four times the original
Answer» Why for constructive interference Maximum Intensity is four times the original

Discussion

7.	Oxidation number of S in S2− is
Answer» Oxidation number of S in $S^{2 -}$ is

Discussion

8.	Give gauss law and its applications.
Answer» Give gauss law and its applications.

Discussion

9.	Consider the following graph of Z vs1Vm drawn at a low pressure and at inversion temperature, using the Virial form of van der Waal's equation: Z=1+(b−aRT)1Vm+b2V2m+b3V3m+…… Find the critical molar volume (Vc) in cm3?
Answer» Consider the following graph of $Z vs \frac{1}{V_{m}}$ drawn at a low pressure and at inversion temperature, using the Virial form of van der Waal's equation: $Z = 1 + (b - \frac{a}{R T}) \frac{1}{V_{m}} + \frac{b^{2}}{V_{m}^{2}} + \frac{b^{3}}{V_{m}^{3}} + \dots \dots$ Find the critical molar volume $(V_{c})$ in ${cm}^{3}$ ?

Discussion

10.	In which of the following compound transition metal has zero oxidation state
Answer» In which of the following compound transition metal has zero oxidation state

Discussion

11.	Dear sir , Why exactly the degree of dissociation or alpha is equal to the ratio of molar conductivity at concentration c by the molar conductivity at infinite dilution ? How did we get that expression?
Answer» Dear sir , Why exactly the degree of dissociation or alpha is equal to the ratio of molar conductivity at concentration c by the molar conductivity at infinite dilution ? How did we get that expression?

Discussion

12.	In an air standard Otto cycle the net work is 1000 kJ/kg and the maximum temperature in the cycle is 3200 K. The temperature at the end of the compression is 800K Cv=0.718 kJ/kg.K,Cp=1 kJ/kg.K,γ=1.4) The thermal efficiency of the cycle is ________%58.03
Answer» In an air standard Otto cycle the net work is 1000 kJ/kg and the maximum temperature in the cycle is 3200 K. The temperature at the end of the compression is 800K $C_{v} = 0.718 k J / k g . K, C_{p} = 1 k J / k g . K, γ = 1.4)$ The thermal efficiency of the cycle is ________% 58.03

Discussion

13.	What does 3rd order of reaction means?
Answer» What does 3rd order of reaction means?

Discussion

14.	CASE 1: Read the passage given below and answer the following questionThe solution which obeys Raoult’s law over the entire range of concentration are known as ideal solutions. The solution which does not obey Raoults law over the entire range of concentration, then it is called non-ideal solution. The vapour pressure of such as a solution is either higher or lower than that predicted by Raoult’s law. If it is higher, the solution exhibits positive deviation and if it is lower, it exhibits negative deviation from Raoult’s law.Some liquids on mixing, form azeotropes which are binary mixture having the same composition in liquid and vapour phase. There are two types of azeotropes. Minimum boiling azeotropes and maximum boiling azeotropes.Incorrect thermodynamic relation for ideal solution is:[0.77 Mark]
Answer» CASE 1: Read the passage given below and answer the following question The solution which obeys Raoult’s law over the entire range of concentration are known as ideal solutions. The solution which does not obey Raoults law over the entire range of concentration, then it is called non-ideal solution. The vapour pressure of such as a solution is either higher or lower than that predicted by Raoult’s law. If it is higher, the solution exhibits positive deviation and if it is lower, it exhibits negative deviation from Raoult’s law. Some liquids on mixing, form azeotropes which are binary mixture having the same composition in liquid and vapour phase. There are two types of azeotropes. Minimum boiling azeotropes and maximum boiling azeotropes. Incorrect thermodynamic relation for ideal solution is: [0.77 Mark]

Discussion

15.	extraction of zinc
Answer» extraction of zinc

Discussion

16.	Which of the following option w.r.t increasing bond order is correct
Answer» Which of the following option w.r.t increasing bond order is correct

Discussion

17.	Which of the following is position isomer of CH3−CH2−CH=CH2:
Answer» Which of the following is position isomer of $C H_{3} - C H_{2} - C H = C H_{2}$ :

Discussion

18.	The whole mixture in the calorimeter becomes water, if,
Answer» The whole mixture in the calorimeter becomes water, if,

Discussion

19.	The density of lead is 11.35gcm^-3 and the metal crystallizes with fcc unit cell estimate radius of leadatom
Answer» The density of lead is 11.35gcm^-3 and the metal crystallizes with fcc unit cell estimate radius of leadatom

Discussion

20.	What is molarity or mole fraction
Answer» What is molarity or mole fraction

Discussion

21.	The formula of the complex, tris-(ethylenediamine)cobalt(III) sulphate is :
Answer» The formula of the complex, tris-(ethylenediamine)cobalt(III) sulphate is :

Discussion

22.	How much of carbon dioxide bas is liberated at STP by the complete combustion of 1.5g of ethane?
Answer» How much of carbon dioxide bas is liberated at STP by the complete combustion of 1.5g of ethane?

Discussion

23.	73 why the IUPAC name is benzene carbaldehyde and not benzenal, similarly for other functional groups as well?
Answer» 73 why the IUPAC name is benzene carbaldehyde and not benzenal, similarly for other functional groups as well?

Discussion

24.	Both antacids and antiallergic drugs are antihistamines but they cannot replace each other. Explain why?
Answer» Both antacids and antiallergic drugs are antihistamines but they cannot replace each other. Explain why?

Discussion

25.	Among the following, the number of elements showing only one non-zero oxidation state is O, Cl, F, N, P, Sn, Tl, Na, Ti
Answer» Among the following, the number of elements showing only one non-zero oxidation state is $O, C l, F, N, P, S n, T l, N a, T i$

Discussion

26.	Question 51Esters are sweet smelling substance and are used in making perfumes. Suggest some activity and the reaction involved in the preparation of an ester with a well-labelled diagram.
Answer» Question 51 Esters are sweet smelling substance and are used in making perfumes. Suggest some activity and the reaction involved in the preparation of an ester with a well-labelled diagram.

Discussion

27.	Show by drawing Lewis dot structure that oxidation number of N in NO2- is +3
Answer» Show by drawing Lewis dot structure that oxidation number of N in NO2- is +3

Discussion

28.	How to find nor of stereo and geometrical isomers of a given compound?
Answer» How to find nor of stereo and geometrical isomers of a given compound?

Discussion

29.	Identify the product Y in the following reaction sequence
Answer» Identify the product Y in the following reaction sequence

Discussion

30.	Solutions which show positve or negative deviation from the Raoult's law are called
Answer» Solutions which show positve or negative deviation from the Raoult's law are called

Discussion

31.	How electron gain enthalpy can be endothermic and exothermic?
Answer» How electron gain enthalpy can be endothermic and exothermic?

Discussion

32.	why [Co (en)3] Cl3 donot show geometrical isomerism and why [Pt (NH3) (H2O) Cl2] donot show optical isomerism??
Answer» why [Co (en)3] Cl3 donot show geometrical isomerism and why [Pt (NH3) (H2O) Cl2] donot show optical isomerism??

Discussion

33.	The elimination takes place by which mechanism?
Answer» The elimination takes place by which mechanism?

Discussion

34.	CH3−CH2−CH2−Br→CH3−CH2−CH2−CH3The most effective reagent for the above transformation is:
Answer» $C H_{3} - C H_{2} - C H_{2} - B r \to C H_{3} - C H_{2} - C H_{2} - C H_{3}$ The most effective reagent for the above transformation is:

Discussion

35.	When and why is quantization of charge ignored? Explain "charge is relativistically invariant"
Answer» When and why is quantization of charge ignored? Explain "charge is relativistically invariant"

Discussion

36.	Degree of unsaturation (DOU) for the given compound is :
Answer» Degree of unsaturation (DOU) for the given compound is :

Discussion

37.	An element with atomic number 113 has been discoverd it will belong to which of group number ,block,period,and outershell electronic configuration?
Answer» An element with atomic number 113 has been discoverd it will belong to which of group number ,block,period,and outershell electronic configuration?

Discussion

38.	Isopentane on monochlorination gives four isomeric monochloro derivatives of isopentane. Which product(s) has/have a yield less than 35% in the mixture?
Answer» Isopentane on monochlorination gives four isomeric monochloro derivatives of isopentane. Which product(s) has/have a yield less than 35% in the mixture?

Discussion

39.	Consider the cell Ag(s)\|AgBr(s)\|\|Br−(aq)\|\|AgCl(s)\|Cl−(aq)\|Ag(s)25∘C.The solubility product constants of AgBr and AgCl are respectively 5×10−13 and 1×10−10. For what ratio of the concentration of Br− and Cl− ions would the emf of the cell be zero?
Answer» Consider the cell $A g (s) \| A g B r (s) \| \| B r^{-} (a q) \| \| A g C l (s) \| C l^{-} (a q) \| A g (s) 25^{\circ} C$ .The solubility product constants of AgBr and AgCl are respectively $5 \times 10^{- 13}$ and $1 \times 10^{- 10}$ . For what ratio of the concentration of $B r^{-}$ and $C l^{-}$ ions would the emf of the cell be zero?

Discussion

40.	Which is the strongest of the following acids
Answer» Which is the strongest of the following acids

Discussion

41.	Which of the following represent the plot of log (xm) vs C for Freundlich adsorption isotherm in solution phase?Here,(xm) is extent of adsorptionC is equilibrium concentration
Answer» Which of the following represent the plot of $l o g (\frac{x}{m}) v s C$ for Freundlich adsorption isotherm in solution phase? Here, $(\frac{x}{m})$ is extent of adsorption $C$ is equilibrium concentration

Discussion

42.

The figures given below show different processes (relating pressure P and volume V) for a given amount for an ideal gas. ΔW is work done by the gas and ΔQ is heat absorbed by the gas. Column 1 Column 2 i. In Fig. (i) (a). ΔQ>0 ii. In Fig. (ii) (b). ΔW<0 iii. In Fig. (iii) (c). ΔQ<0 iv. In Fig. (iv) (d). ΔW>0

Answer»

The figures given below show different processes (relating pressure P and volume V) for a given amount for an ideal gas. $Δ W$ is work done by the gas and $Δ Q$ is heat absorbed by the gas.

Column 1	Column 2
i. In Fig. (i)	(a). $Δ Q > 0$
ii. In Fig. (ii)	(b). $Δ W < 0$
iii. In Fig. (iii)	(c). $Δ Q < 0$
iv. In Fig. (iv)	(d). $Δ W > 0$

Discussion

43.	The primary cause of geometrical isomerism is due to
Answer» The primary cause of geometrical isomerism is due to

Discussion

44.	How traces of electrolyte is require for stability of colloidal solution whereas the larger quantities coagulate it
Answer» How traces of electrolyte is require for stability of colloidal solution whereas the larger quantities coagulate it

Discussion

45.	In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the option out of the choices given below in each question Assertion (A) Significant figures for 0.200 is 3 where as for 200 it is 1. Reason (R) Zero at the end or right of a number are significant provided they are not on the right side of the decimal point. (a) Both A and R are true and R is correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A (c) A is true but R is false. (d) Both A and R are false.
Answer» In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the option out of the choices given below in each question Assertion (A) Significant figures for 0.200 is 3 where as for 200 it is 1. Reason (R) Zero at the end or right of a number are significant provided they are not on the right side of the decimal point. (a) Both A and R are true and R is correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A (c) A is true but R is false. (d) Both A and R are false.

45.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the option out of the choices given below in each question Assertion (A) Significant figures for 0.200 is 3 where as for 200 it is 1. Reason (R) Zero at the end or right of a number are significant provided they are not on the right side of the decimal point. (a) Both A and R are true and R is correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A (c) A is true but R is false. (d) Both A and R are false.

Answer»

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the option out of the choices given below in each question

Assertion (A) Significant figures for 0.200 is 3 where as for 200 it is 1.

Reason (R) Zero at the end or right of a number are significant provided they are not on the right side of the decimal point.

(a) Both A and R are true and R is correct explanation of A.

(b) Both A and R are true but R is not the correct explanation of A

(c) A is true but R is false.

(d) Both A and R are false.

Discussion

46.	Calculate the molality of a solution of urea in acetic acid if the mole fraction of urea in solution is 0.5 ( molecular weight of urea=60) (1) 50/3 (2) 25/3 (3) 100/3 (4) 40/3
Answer» Calculate the molality of a solution of urea in acetic acid if the mole fraction of urea in solution is 0.5 ( molecular weight of urea=60) (1) 50/3 (2) 25/3 (3) 100/3 (4) 40/3

Discussion

47.	Why cesium is more electron positive than francium?
Answer» Why cesium is more electron positive than francium?

Discussion

48.	The ratio of e/m is always same for every gases
Answer» The ratio of e/m is always same for every gases

Discussion

49.	Cl2 gas is obtained by various reactions but not by:(1)KMnO4+conc. HCl (2) KCI + K2Cr2O7+ conc. H2SO4 (3) MnO2+ conc. HCI (4) KCI +F2
Answer» Cl2 gas is obtained by various reactions but not by:(1)KMnO4+conc. HCl (2) KCI + K2Cr2O7+ conc. H2SO4 (3) MnO2+ conc. HCI (4) KCI +F2

Discussion

50.	10 cc H2O2 solution when reacted with KI (solution) produced 0.5 g iodine. What is percentage purity of H2O2 ?
Answer» 10 cc H2O2 solution when reacted with KI (solution) produced 0.5 g iodine. What is percentage purity of H2O2 ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

61.Molar ratio of Na2SO3 and H2O is 1:7 in Na2SO3.xH2O Hence their mass of percentage is A)12.5:87.5 B)87.5:12.5 C)50:50 D)75:25

Ch3br +c2h5mgbr--> product AProduct A is PropaneEthaneButanePentane

Comment on the statement that elements of the first transition series possess many properties different from those of heavier transition elements.

For which of the following reactions ΔHreaction is equal to ΔHformation

A compound (A) when treated with one mole of CH3MgBr in ether followed by hydrolysis gives product (B) which upon treatment with conc. H2SO4 furnishes a olefin. Reductive ozonolysis of said olefin produces a ketone which gives positive iodoform test. Structure of A is:

Why for constructive interference Maximum Intensity is four times the original

Oxidation number of S in S2− is

Give gauss law and its applications.

Consider the following graph of Z vs1Vm drawn at a low pressure and at inversion temperature, using the Virial form of van der Waal's equation: Z=1+(b−aRT)1Vm+b2V2m+b3V3m+…… Find the critical molar volume (Vc) in cm3?

In which of the following compound transition metal has zero oxidation state

Dear sir , Why exactly the degree of dissociation or alpha is equal to the ratio of molar conductivity at concentration c by the molar conductivity at infinite dilution ? How did we get that expression?

In an air standard Otto cycle the net work is 1000 kJ/kg and the maximum temperature in the cycle is 3200 K. The temperature at the end of the compression is 800K Cv=0.718 kJ/kg.K,Cp=1 kJ/kg.K,γ=1.4) The thermal efficiency of the cycle is ________%58.03

What does 3rd order of reaction means?

extraction of zinc

Which of the following option w.r.t increasing bond order is correct

Which of the following is position isomer of CH3−CH2−CH=CH2:

The whole mixture in the calorimeter becomes water, if,

The density of lead is 11.35gcm^-3 and the metal crystallizes with fcc unit cell estimate radius of leadatom

What is molarity or mole fraction

The formula of the complex, tris-(ethylenediamine)cobalt(III) sulphate is :

How much of carbon dioxide bas is liberated at STP by the complete combustion of 1.5g of ethane?

73 why the IUPAC name is benzene carbaldehyde and not benzenal, similarly for other functional groups as well?

Both antacids and antiallergic drugs are antihistamines but they cannot replace each other. Explain why?

Among the following, the number of elements showing only one non-zero oxidation state is O, Cl, F, N, P, Sn, Tl, Na, Ti

Question 51Esters are sweet smelling substance and are used in making perfumes. Suggest some activity and the reaction involved in the preparation of an ester with a well-labelled diagram.

Show by drawing Lewis dot structure that oxidation number of N in NO2- is +3

How to find nor of stereo and geometrical isomers of a given compound?

Identify the product Y in the following reaction sequence

Solutions which show positve or negative deviation from the Raoult's law are called

How electron gain enthalpy can be endothermic and exothermic?

why [Co (en)3] Cl3 donot show geometrical isomerism and why [Pt (NH3) (H2O) Cl2] donot show optical isomerism??

The elimination takes place by which mechanism?

CH3−CH2−CH2−Br→CH3−CH2−CH2−CH3The most effective reagent for the above transformation is:

When and why is quantization of charge ignored? Explain "charge is relativistically invariant"

Degree of unsaturation (DOU) for the given compound is :

An element with atomic number 113 has been discoverd it will belong to which of group number ,block,period,and outershell electronic configuration?

Isopentane on monochlorination gives four isomeric monochloro derivatives of isopentane. Which product(s) has/have a yield less than 35% in the mixture?

Consider the cell Ag(s)|AgBr(s)||Br−(aq)||AgCl(s)|Cl−(aq)|Ag(s)25∘C.The solubility product constants of AgBr and AgCl are respectively 5×10−13 and 1×10−10. For what ratio of the concentration of Br− and Cl− ions would the emf of the cell be zero?

Which is the strongest of the following acids

Which of the following represent the plot of log (xm) vs C for Freundlich adsorption isotherm in solution phase?Here,(xm) is extent of adsorptionC is equilibrium concentration

The primary cause of geometrical isomerism is due to

How traces of electrolyte is require for stability of colloidal solution whereas the larger quantities coagulate it

Calculate the molality of a solution of urea in acetic acid if the mole fraction of urea in solution is 0.5 ( molecular weight of urea=60) (1) 50/3 (2) 25/3 (3) 100/3 (4) 40/3

Why cesium is more electron positive than francium?

The ratio of e/m is always same for every gases

Cl2 gas is obtained by various reactions but not by:(1)KMnO4+conc. HCl (2) KCI + K2Cr2O7+ conc. H2SO4 (3) MnO2+ conc. HCI (4) KCI +F2

10 cc H2O2 solution when reacted with KI (solution) produced 0.5 g iodine. What is percentage purity of H2O2 ?