46295 + Interview Questions in Chemistry Page 48 InterviewSolution

2351.	What happens when Phosphonium halide reacts with boiling water ?
Answer» What happens when Phosphonium halide reacts with boiling water ?

Discussion

2352.	calculate the molality of solution of C_2H_5OH in water in which the mole fraction of C_2H_5OH is 0.050.
Answer» calculate the molality of solution of C_2H_5OH in water in which the mole fraction of C_2H_5OH is 0.050.

Discussion

2353.	1.2 kg methane is burned in air. If the mass and volume ratios of N2 and O2 in air are 3.29 and 3.76 respectively, the mass of air required for complete burning is ______ kg.20.59
Answer» 1.2 kg methane is burned in air. If the mass and volume ratios of $N_{2} a n d O_{2}$ in air are 3.29 and 3.76 respectively, the mass of air required for complete burning is ______ kg. 20.59

Discussion

2354.	65.The excluded volume for oxygen gas is 0.0318L/mol which is also 4 times the actual volume of molecules. Calculate the radius of oxygen molecule.
Answer» 65.The excluded volume for oxygen gas is 0.0318L/mol which is also 4 times the actual volume of molecules. Calculate the radius of oxygen molecule.

Discussion

2355.	In the given reaction, C6H6 + Br2 → C6H5Br + HBr39 g of C6H6 reacts with 40 g of Br2. It was found that 19.625 g of C6H5Br was obtained. Calculate the percentage yield of the reaction.(Given, Molar mass of: C6H6=78 g mol−1, Br2=160 g mol−1, C6H5Br=157 g mol−1)
Answer» In the given reaction, $C_{6} H_{6} + B r_{2} \to C_{6} H_{5} B r + H B r$ $39 g$ of $C_{6} H_{6}$ reacts with $40 g$ of $B r_{2}$ . It was found that $19.625 g$ of $C_{6} H_{5} B r$ was obtained. Calculate the percentage yield of the reaction. $(Given, Molar mass of: C_{6} H_{6} = 78 {g mol}^{- 1}, B r_{2} = 160 {g mol}^{- 1}, C_{6} H_{5} B r = 157 {g mol}^{- 1})$

Discussion

2356.	What is the significance of cubic closed packed structure and Hexagonal closed packed structure?
Answer» What is the significance of cubic closed packed structure and Hexagonal closed packed structure?

Discussion

2357.	The position of Octahedral voids in ccp is not clear to me.
Answer» The position of Octahedral voids in ccp is not clear to me.

Discussion

2358.	Cl, Br and I shows +R or - R effect?
Answer» Cl, Br and I shows +R or - R effect?

Discussion

2359.	A reaction accompanied with the absorption of energy is:
Answer» A reaction accompanied with the absorption of energy is:

Discussion

2360.	The correct order of thermal stability of tetrahalides of carbon is:
Answer» The correct order of thermal stability of tetrahalides of carbon is:

Discussion

2361.	In the Liebermann test for phenols, the blue or green colour produced is due to the formation of
Answer» In the Liebermann test for phenols, the blue or green colour produced is due to the formation of

Discussion

2362.	calculate the molality of the solution of C2H5OH in water in which the mole fraction of C2H5OH is 0.050
Answer» calculate the molality of the solution of $C_{2} H_{5} O H$ in water in which the mole fraction of $C_{2} H_{5} O H$ is 0.050

Discussion

2363.	10. in the e1 mechanism if we know the order of stability of carbocations. then the order of reactivity should be reverse of it or it will be same?
Answer» 10. in the e1 mechanism if we know the order of stability of carbocations. then the order of reactivity should be reverse of it or it will be same?

Discussion

2364.	A scrap metal dealer gets a huge consignment of crude metallic Lead. For a profitable deal he needs to refine the metal using electrolysis. Which one of the following is a good choice for an electrolyte?
Answer» A scrap metal dealer gets a huge consignment of crude metallic Lead. For a profitable deal he needs to refine the metal using electrolysis. Which one of the following is a good choice for an electrolyte?

Discussion

2365.	2 molal solution of a weak acid HA has a freezing point of 3.885 oC. The degree of dissociation of this acid is _________ × 10−3. (Round off to the Nearest Integer). [Given: Molal depression constant of water = 1.85 K kg mol−1Freezing point of pure water = 0oC]
Answer» 2 molal solution of a weak acid HA has a freezing point of $3.885^{o} C$ . The degree of dissociation of this acid is _________ × $10^{- 3}$ . (Round off to the Nearest Integer). [Given: Molal depression constant of water = $1.85 K k g m o l^{- 1}$ Freezing point of pure water = $0^{o} C$ ]

Discussion

2366.	Can Vapor Density be calculated for a gas which is not at STP and only the density of the gas and hydrogen at presend temperature and pressure are known?
Answer» Can Vapor Density be calculated for a gas which is not at STP and only the density of the gas and hydrogen at presend temperature and pressure are known?

Discussion

2367.	If 0.5 moles of BaCl2 is mixed with 0.1 moles of Na3PO4, the maximum amount of Ba3(PO4)2 that can be formed is
Answer» If 0.5 moles of $B a C l_{2}$ is mixed with 0.1 moles of $N a_{3} P O_{4},$ the maximum amount of $B a_{3} (P O_{4})_{2}$ that can be formed is

Discussion

2368.	Which of the following pairs of compounds are not positional isomers?
Answer» Which of the following pairs of compounds are not positional isomers?

Discussion

2369.	Why phenoxide ion is more reactive than phenol towards electrophillic aromatic reaction
Answer» Why phenoxide ion is more reactive than phenol towards electrophillic aromatic reaction

Discussion

2370.	The correct order of increasing dipole moments is:
Answer» The correct order of increasing dipole moments is:

Discussion

2371.	Why is +M effect of -OH greater than that of -OR?
Answer» Why is +M effect of -OH greater than that of -OR?

Discussion

2372.	HBr addition to alkene will yield an anti addition product or syn addition produc
Answer» HBr addition to alkene will yield an anti addition product or syn addition produc

Discussion

2373.	Na2\lbrack Ni(CN)4\rbrack on reaction with Na+ liquid ammonia gives?
Answer» Na2\lbrack Ni(CN)4\rbrack on reaction with Na+ liquid ammonia gives?

Discussion

2374.	Why do solids have a definite volume ?
Answer» Why do solids have a definite volume ?

Discussion

2375.	does the range of the force depend on its strength?
Answer» does the range of the force depend on its strength?

Discussion

2376.	Which element has maximum electron affinity
Answer» Which element has maximum electron affinity

Discussion

2377.	Dear Sir/Madam, My doubt is that the catalyst does not involve in a reaction but only speeds up the reaction. But if by chance it gets involved into the reaction what would be the result? or is it not possible!
Answer» Dear Sir/Madam, My doubt is that the catalyst does not involve in a reaction but only speeds up the reaction. But if by chance it gets involved into the reaction what would be the result? or is it not possible!

Discussion

2378.	Not considering the electronic spin, the degeneracy of the second excited state of H−atom is 9, while the degeneracy of the second excited state of H− is :
Answer» Not considering the electronic spin, the degeneracy of the second excited state of $H - a t o m$ is 9, while the degeneracy of the second excited state of $H^{-}$ is :

Discussion

2379.	CsBr has bcc structure with edge lengths 4.3. The shortest inter ionic distance( in pm) in between Cs+ and Br− is: (Given, √3=1.73)
Answer» $C s B r$ has bcc structure with edge lengths $4.3$ . The shortest inter ionic distance $(in pm)$ in between $C s^{+}$ and $B r^{-}$ is: (Given, $\sqrt{3} = 1.73$ )

Discussion

2380.	Discuss briefly giving an example in each case the role of coordination compounds in: (i) biological system (ii) medicinal chemistry (iii) analytical chemistry (iv) extraction/metallurgy of metals
Answer» Discuss briefly giving an example in each case the role of coordination compounds in: (i) biological system (ii) medicinal chemistry (iii) analytical chemistry (iv) extraction/metallurgy of metals

2380.

Discuss briefly giving an example in each case the role of coordination compounds in: (i) biological system (ii) medicinal chemistry (iii) analytical chemistry (iv) extraction/metallurgy of metals

Answer»

Discuss briefly giving an example in each case the role of
coordination compounds in:

(i)
biological system

(ii)
medicinal chemistry

(iii)
analytical chemistry

(iv)
extraction/metallurgy of metals

Discussion

2381.	Cr(NH3)xcl3\overset{AgNo3(excess)}{→1 mole Agcl.find the vlue of x
Answer» Cr(NH3)xcl3\overset{AgNo3(excess)}{→1 mole Agcl.find the vlue of x

Discussion

2382.	Predictthe products formed when cyclohexanecarbaldehyde reacts withfollowing reagents.(i) PhMgBrand then H3O+(ii)Tollens’reagent(iii) Semicarbazideand weak acid(iv)Excessethanol and acid(v) Zincamalgam and dilute hydrochloric acid
Answer» Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents. (i) PhMgBr and then H₃O⁺ (ii)Tollens’ reagent (iii) Semicarbazide and weak acid (iv)Excess ethanol and acid (v) Zinc amalgam and dilute hydrochloric acid

2382.

Predictthe products formed when cyclohexanecarbaldehyde reacts withfollowing reagents.(i) PhMgBrand then H3O+(ii)Tollens’reagent(iii) Semicarbazideand weak acid(iv)Excessethanol and acid(v) Zincamalgam and dilute hydrochloric acid

Answer»

Predict
the products formed when cyclohexanecarbaldehyde reacts with
following reagents.

(i)
PhMgBr
and then H₃O⁺

(ii)Tollens’
reagent

(iii)
Semicarbazide
and weak acid

(iv)Excess
ethanol and acid

(v)
Zinc
amalgam and dilute hydrochloric acid

Discussion

2383.	Which of the following is not an isomer of CH3−CH2−CHO ?
Answer» Which of the following is not an isomer of $C H_{3} - C H_{2} - C H O$ ?

Discussion

2384.	which of the following pair will show common ion effect?(a)BaCl2+Ba(NO3)2(b)AgCN+KCN(c)NaOH+NH4CN(d)HCOOH+H2SO4GIVE REASON.EXPLAIN ALL OPTIONS
Answer» which of the following pair will show common ion effect? (a)BaCl2+Ba(NO3)2 (b)AgCN+KCN (c)NaOH+NH4CN (d)HCOOH+H2SO4 GIVE REASON.EXPLAIN ALL OPTIONS

Discussion

2385.	Arrange (I) Ce3+, (II) La3+, (III) Pm3+ and (IV) Yb3+ in increasing order of their ionic radii
Answer» Arrange (I) $C e^{3 +}$ , (II) $L a^{3 +}$ , (III) $P m^{3 +}$ and (IV) $Y b^{3 +}$ in increasing order of their ionic radii

Discussion

2386.	in which of the follwoing dipole moment is largest1.CH2Cl22.CHCl33.CCl44.CO2
Answer» in which of the follwoing dipole moment is largest 1.CH2Cl2 2.CHCl3 3.CCl4 4.CO2

Discussion

2387.	The number of isomers which are ethers and having the molecular formula C4H10O, is
Answer» The number of isomers which are ethers and having the molecular formula $C_{4} H_{10} O$ , is

Discussion

2388.	When 10 ml of 0.1 M acetic acid (pK_a =5.0) is titrated against 10 ml of 0.1 M ammonia solution (pK_b =5.0) , the equivalence point occurs at pH- (1) 5.0 (2) 6.0 (3) 7.0 (4) 9.0
Answer» When 10 ml of 0.1 M acetic acid (pK_a =5.0) is titrated against 10 ml of 0.1 M ammonia solution (pK_b =5.0) , the equivalence point occurs at pH- (1) 5.0 (2) 6.0 (3) 7.0 (4) 9.0

Discussion

2389.	32. A 0.150 mol sample of an ideal gas is allowed to expand at 294 K from 10.00 atm to 1.00 atm. If external pressure is kept constant at 1.00 atm. Calculate the work done.
Answer» 32. A 0.150 mol sample of an ideal gas is allowed to expand at 294 K from 10.00 atm to 1.00 atm. If external pressure is kept constant at 1.00 atm. Calculate the work done.

Discussion

2390.	(CH3)3C−OH+HClZnCl2−−−−→(CH3)3C−Cl+H2OIn the above reaction, the leaving group is:
Answer» $(C H_{3})_{3} C - O H + H C l Z n C l_{2} - --- \to (C H_{3})_{3} C - C l + H_{2} O$ In the above reaction, the leaving group is:

Discussion

2391.	Is it important to learn the definitions of the base physical quantities?
Answer» Is it important to learn the definitions of the base physical quantities?

Discussion

2392.	Defects in solid
Answer» Defects in solid

Discussion

2393.	Silicon is found in nature in the form of [MH CET 2002]
Answer» Silicon is found in nature in the form of [MH CET 2002]

2393.

Silicon is found in nature in the form of [MH CET 2002]

Answer»

Silicon is found in nature in the form of

[MH CET 2002]

Discussion

2394.	Is nitrosyl ligand a π acid ligand or is the nitrosonium ligand a π acid ligand ?
Answer» Is nitrosyl ligand a π acid ligand or is the nitrosonium ligand a π acid ligand ?

Discussion

2395.	Which of the following process represents disproportionation reaction?
Answer» Which of the following process represents disproportionation reaction?

Discussion

2396.	Apart from Hf and Zr in which all elements the consequence of lanthanoid contraction is seen?
Answer» Apart from Hf and Zr in which all elements the consequence of lanthanoid contraction is seen?

Discussion

2397.	How many moles of oxygen present in sulphur dioxide which has same number of oxygen atoms in co2
Answer» How many moles of oxygen present in sulphur dioxide which has same number of oxygen atoms in co2

Discussion

2398.	If α is the mean free path of the gas molecule, then calculate mean free path along x-axis and also along the x-y plane.
Answer» If α is the mean free path of the gas molecule, then calculate mean free path along x-axis and also along the x-y plane.

Discussion

2399.	47 How does Ni(CO)4 have zero net charge while Ni has a +2 valency?
Answer» 47 How does Ni(CO)4 have zero net charge while Ni has a +2 valency?

Discussion

2400.	Calculate the molality of a solution of ethanol in water in which the mole fraction of ethanol is 0.040.
Answer» Calculate the molality of a solution of ethanol in water in which the mole fraction of ethanol is 0.040.

Discussion

Explore topic-wise InterviewSolutions in .

What happens when Phosphonium halide reacts with boiling water ?

calculate the molality of solution of C_2H_5OH in water in which the mole fraction of C_2H_5OH is 0.050.

1.2 kg methane is burned in air. If the mass and volume ratios of N2 and O2 in air are 3.29 and 3.76 respectively, the mass of air required for complete burning is ______ kg.20.59

65.The excluded volume for oxygen gas is 0.0318L/mol which is also 4 times the actual volume of molecules. Calculate the radius of oxygen molecule.

In the given reaction, C6H6 + Br2 → C6H5Br + HBr39 g of C6H6 reacts with 40 g of Br2. It was found that 19.625 g of C6H5Br was obtained. Calculate the percentage yield of the reaction.(Given, Molar mass of: C6H6=78 g mol−1, Br2=160 g mol−1, C6H5Br=157 g mol−1)

What is the significance of cubic closed packed structure and Hexagonal closed packed structure?

The position of Octahedral voids in ccp is not clear to me.

Cl, Br and I shows +R or - R effect?

A reaction accompanied with the absorption of energy is:

The correct order of thermal stability of tetrahalides of carbon is:

In the Liebermann test for phenols, the blue or green colour produced is due to the formation of

calculate the molality of the solution of C2H5OH in water in which the mole fraction of C2H5OH is 0.050

10. in the e1 mechanism if we know the order of stability of carbocations. then the order of reactivity should be reverse of it or it will be same?

A scrap metal dealer gets a huge consignment of crude metallic Lead. For a profitable deal he needs to refine the metal using electrolysis. Which one of the following is a good choice for an electrolyte?

2 molal solution of a weak acid HA has a freezing point of 3.885 oC. The degree of dissociation of this acid is _________ × 10−3. (Round off to the Nearest Integer). [Given: Molal depression constant of water = 1.85 K kg mol−1Freezing point of pure water = 0oC]

Can Vapor Density be calculated for a gas which is not at STP and only the density of the gas and hydrogen at presend temperature and pressure are known?

If 0.5 moles of BaCl2 is mixed with 0.1 moles of Na3PO4, the maximum amount of Ba3(PO4)2 that can be formed is

Which of the following pairs of compounds are not positional isomers?

Why phenoxide ion is more reactive than phenol towards electrophillic aromatic reaction

The correct order of increasing dipole moments is:

Why is +M effect of -OH greater than that of -OR?

HBr addition to alkene will yield an anti addition product or syn addition produc

Na2\lbrack Ni(CN)4\rbrack on reaction with Na+ liquid ammonia gives?

Why do solids have a definite volume ?

does the range of the force depend on its strength?

Which element has maximum electron affinity

Dear Sir/Madam, My doubt is that the catalyst does not involve in a reaction but only speeds up the reaction. But if by chance it gets involved into the reaction what would be the result? or is it not possible!

Not considering the electronic spin, the degeneracy of the second excited state of H−atom is 9, while the degeneracy of the second excited state of H− is :

CsBr has bcc structure with edge lengths 4.3. The shortest inter ionic distance( in pm) in between Cs+ and Br− is: (Given, √3=1.73)

Discuss briefly giving an example in each case the role of coordination compounds in: (i) biological system (ii) medicinal chemistry (iii) analytical chemistry (iv) extraction/metallurgy of metals

Cr(NH3)xcl3\overset{AgNo3(excess)}{→1 mole Agcl.find the vlue of x

Predictthe products formed when cyclohexanecarbaldehyde reacts withfollowing reagents.(i) PhMgBrand then H3O+(ii)Tollens’reagent(iii) Semicarbazideand weak acid(iv)Excessethanol and acid(v) Zincamalgam and dilute hydrochloric acid

Which of the following is not an isomer of CH3−CH2−CHO ?

which of the following pair will show common ion effect?(a)BaCl2+Ba(NO3)2(b)AgCN+KCN(c)NaOH+NH4CN(d)HCOOH+H2SO4GIVE REASON.EXPLAIN ALL OPTIONS

Arrange (I) Ce3+, (II) La3+, (III) Pm3+ and (IV) Yb3+ in increasing order of their ionic radii

in which of the follwoing dipole moment is largest1.CH2Cl22.CHCl33.CCl44.CO2

The number of isomers which are ethers and having the molecular formula C4H10O, is

When 10 ml of 0.1 M acetic acid (pK_a =5.0) is titrated against 10 ml of 0.1 M ammonia solution (pK_b =5.0) , the equivalence point occurs at pH- (1) 5.0 (2) 6.0 (3) 7.0 (4) 9.0

32. A 0.150 mol sample of an ideal gas is allowed to expand at 294 K from 10.00 atm to 1.00 atm. If external pressure is kept constant at 1.00 atm. Calculate the work done.

(CH3)3C−OH+HClZnCl2−−−−→(CH3)3C−Cl+H2OIn the above reaction, the leaving group is:

Is it important to learn the definitions of the base physical quantities?

Defects in solid

Silicon is found in nature in the form of [MH CET 2002]

Is nitrosyl ligand a π acid ligand or is the nitrosonium ligand a π acid ligand ?

Which of the following process represents disproportionation reaction?

Apart from Hf and Zr in which all elements the consequence of lanthanoid contraction is seen?

How many moles of oxygen present in sulphur dioxide which has same number of oxygen atoms in co2

If α is the mean free path of the gas molecule, then calculate mean free path along x-axis and also along the x-y plane.

47 How does Ni(CO)4 have zero net charge while Ni has a +2 valency?

Calculate the molality of a solution of ethanol in water in which the mole fraction of ethanol is 0.040.