46295 + Interview Questions in Chemistry Page 20 InterviewSolution

951.	Aniline when diazotised in cold and then treated with N, N– dimethyl aniline, gives a colored product. Its structure would be
Answer» Aniline when diazotised in cold and then treated with N, N– dimethyl aniline, gives a colored product. Its structure would be

Discussion

952.	10.Kp is how many times equal to Kc for the given reaction? N2(g)+3H2(g)=2NH3(g)
Answer» 10.Kp is how many times equal to Kc for the given reaction? N2(g)+3H2(g)=2NH3(g)

Discussion

953.	A 5kg block of iron is heated to 800^0C.It is placed in a tub containing 2 litre of water at 15^0C.Assuming all the water is brought to boil rapidly;calculate the mass of water which boils off.
Answer» A 5kg block of iron is heated to 800^0C.It is placed in a tub containing 2 litre of water at 15^0C.Assuming all the water is brought to boil rapidly;calculate the mass of water which boils off.

Discussion

954.	what is the difference between isobutyl and secondary butyl
Answer» what is the difference between isobutyl and secondary butyl

Discussion

955.	Sar how to find the colour of any compound
Answer» Sar how to find the colour of any compound

Discussion

956.	Give reasons : (a) E∘ value for Mn3+/Mn2+ couple is much more positive than that for Fe3+/Fe2+. (b) Iron has higher enthalpy of atomization than that of copper. (c) Sc3+ is colourless in aqueous solution whereas Ti3+ is coloured.
Answer» Give reasons : (a) $E^{\circ}$ value for $M n^{3 +} / M n^{2 +}$ couple is much more positive than that for $F e^{3 +} / F e^{2 +} .$ (b) Iron has higher enthalpy of atomization than that of copper. (c) $S c^{3 +}$ is colourless in aqueous solution whereas $T i^{3 +}$ is coloured.

Discussion

957.	How do find the number of spectral lines explain with formula derievation
Answer» How do find the number of spectral lines explain with formula derievation

Discussion

958.	1.725 g of a metal carbonate is mixed with 300 ml of N/10 HCl. 10 ml of N/2 sodium hydroxide were required to neutralise excess of acid. Calculate the equivalent mass of metal carbonate.
Answer» 1.725 g of a metal carbonate is mixed with 300 ml of N/10 HCl. 10 ml of N/2 sodium hydroxide were required to neutralise excess of acid. Calculate the equivalent mass of metal carbonate.

Discussion

959.	Which of the following is true for a monoclinic system:
Answer» Which of the following is true for a monoclinic system:

Discussion

960.	One of the following amide will not undergo Hoffmann bromamide reaction:
Answer» One of the following amide will not undergo Hoffmann bromamide reaction:

Discussion

961.	The enthalpy of vapourisation of water is 186.5 KJ/mol,then what is it's entropy of vapourisation
Answer» The enthalpy of vapourisation of water is 186.5 KJ/mol,then what is it's entropy of vapourisation

Discussion

962.	What is catiolist?
Answer» What is catiolist?

Discussion

963.	What will be the products in the following r×n : ifentify2 nitroaniline ----Ac2O----:A::A:-----Br2/CH3COOH------- :B: :B:-----H2O/H+------:C::C:-----NaNO2/HCL/∆ ---- :D::D:------ EtOH/∆-------:E:Identify A , B , C ,D ,E
Answer» What will be the products in the following r×n : ifentify 2 nitroaniline ----Ac2O----:A: :A:-----Br2/CH3COOH------- :B: :B:-----H2O/H+------:C: :C:-----NaNO2/HCL/∆ ---- :D: :D:------ EtOH/∆-------:E: Identify A , B , C ,D ,E

Discussion

964.	One mole of an ideal gas expands isothermally from initial state ( 1 atm, 22.4 L, 273 K ) to the final state (0.25 atm,89.6 L) in reversible manner. One mole of the same gas with the same initial state in a different cylinder expands against a constant external pressure of 0.25 atm to final volume 89.6 L. The difference in work done in J is (Round the answer to nearest integer)(Take 1 L atm=101 J, R=8.3 J K−1 mol−1, log2=0.3)
Answer» One mole of an ideal gas expands isothermally from initial state ( 1 atm, 22.4 L, 273 K ) to the final state ( $0.25 a t m, 89.6 L$ ) in reversible manner. One mole of the same gas with the same initial state in a different cylinder expands against a constant external pressure of $0.25 a t m$ to final volume $89.6 L$ . The difference in work done in $J$ is (Round the answer to nearest integer) $(T a k e 1 L a t m = 101 J, R = 8.3 J K^{- 1} m o l^{- 1}, l o g 2 = 0.3)$

Discussion

965.	Why butane has only 2 isomers n butane or isobutane what will happen if we tie one carbon atom to first carbon atom then it will have 3 isomers
Answer» Why butane has only 2 isomers n butane or isobutane what will happen if we tie one carbon atom to first carbon atom then it will have 3 isomers

Discussion

966.	Hybridization scheme of [Fe(H²O)5(NO+)]+²Which ligand will enter inner d orbital
Answer» Hybridization scheme of [Fe(H²O)5(NO+)]+² Which ligand will enter inner d orbital

Discussion

967.	The oxide which has highest acidic charcter is and explain why is it so ? (1) MnO (2) MnO_2 (3) Mn_2O_3 (4) Equal in all of these
Answer» The oxide which has highest acidic charcter is and explain why is it so ? (1) MnO (2) MnO_2 (3) Mn_2O_3 (4) Equal in all of these

Discussion

968.	if a metallic oxide M_2O_3 contains 20% O_2 then equicalent weight of M will be
Answer» if a metallic oxide M_2O_3 contains 20% O_2 then equicalent weight of M will be

Discussion

969.	Pyrolusite on heating with KOH in presence of air gives a dark green compound (A). The solution of (A) on treatment with sulphuric acid gives a purple colour compound (B). Compound (B) with concentrated H2SO4 gives (C) which can decompose to (D) and O2. What is the number of unpaired electrons in the cation of (D)?
Answer» Pyrolusite on heating with $K O H$ in presence of air gives a dark green compound (A). The solution of (A) on treatment with sulphuric acid gives a purple colour compound (B). Compound (B) with concentrated $H_{2} S O_{4}$ gives (C) which can decompose to (D) and $O_{2}$ . What is the number of unpaired electrons in the cation of (D)?

Discussion

970.	How are tetrahedral and octahedral voids calculated by seeing the rank of the CCP ?
Answer» How are tetrahedral and octahedral voids calculated by seeing the rank of the CCP ?

Discussion

971.	Arrange the following reaction mechanism of sulphonation of benzene
Answer» Arrange the following reaction mechanism of sulphonation of benzene

Discussion

972.	What is the difference between dispersal phase and solute? and also What is the difference between dispersal medium and solvent? Are not they same?
Answer» What is the difference between dispersal phase and solute? and also What is the difference between dispersal medium and solvent? Are not they same?

Discussion

973.	34. Which is the predominant product formed on reaction of CH3CH2CH2Cl with Mg in the presence of dry ether: A) CH3CH2CH2MgCl OR B) (CH3)2CHMgCl
Answer» 34. Which is the predominant product formed on reaction of CH3CH2CH2Cl with Mg in the presence of dry ether: A) CH3CH2CH2MgCl OR B) (CH3)2CHMgCl

Discussion

974.	Match the species in Column I with the shape in Column II.Column IColumn IIi.OSF2p.Tetrahedralii.O2SF2q.Lineariii.XeF4r.Square planariv.ClO−4s.Trigonal pyramidalv.I−3t.See - saw
Answer» Match the species in Column I with the shape in Column II. $\begin{matrix} Column I & Column II i . & O S F_{2} & p . & Tetrahedral i i . & O_{2} S F_{2} & q . & Linear i i i . & X e F_{4} & r . & Square planar i v . & C l O_{4}^{-} & s . & Trigonal pyramidal v . & I_{3}^{-} & t . & See - saw \end{matrix}$

Discussion

975.	Ethyl acetate is formed by the reaction between ethanol and acetic acid and the equilibrium is represented as:(i) Write the concentration ratio (reaction quotient), Qc, for this reaction (note: water is not in excess and is not a solvent in this reaction)(ii) At 293 K, if one starts with 1.00 mol of acetic acid and 0.18 mol of ethanol, there is 0.171 mol of ethyl acetate in the final equilibrium mixture. Calculate the equilibrium constant.(iii) Starting with 0.5 mol of ethanol and 1.0 mol of acetic acid and maintaining it at 293 K, 0.214 mol of ethyl acetate is found after sometime. Has equilibrium been reached?
Answer» Ethyl acetate is formed by the reaction between ethanol and acetic acid and the equilibrium is represented as: (i) Write the concentration ratio (reaction quotient), Qc, for this reaction (note: water is not in excess and is not a solvent in this reaction) (ii) At 293 K, if one starts with 1.00 mol of acetic acid and 0.18 mol of ethanol, there is 0.171 mol of ethyl acetate in the final equilibrium mixture. Calculate the equilibrium constant. (iii) Starting with 0.5 mol of ethanol and 1.0 mol of acetic acid and maintaining it at 293 K, 0.214 mol of ethyl acetate is found after sometime. Has equilibrium been reached?

975.

Ethyl acetate is formed by the reaction between ethanol and acetic acid and the equilibrium is represented as:(i) Write the concentration ratio (reaction quotient), Qc, for this reaction (note: water is not in excess and is not a solvent in this reaction)(ii) At 293 K, if one starts with 1.00 mol of acetic acid and 0.18 mol of ethanol, there is 0.171 mol of ethyl acetate in the final equilibrium mixture. Calculate the equilibrium constant.(iii) Starting with 0.5 mol of ethanol and 1.0 mol of acetic acid and maintaining it at 293 K, 0.214 mol of ethyl acetate is found after sometime. Has equilibrium been reached?

Answer»

Ethyl acetate is formed by the reaction between ethanol and acetic acid and the equilibrium is represented as:

(i) Write the concentration ratio (reaction quotient), Qc, for this reaction (note: water is not in excess and is not a solvent in this reaction)

(ii) At 293 K, if one starts with 1.00 mol of acetic acid and 0.18 mol of ethanol, there is 0.171 mol of ethyl acetate in the final equilibrium mixture. Calculate the equilibrium constant.

(iii) Starting with 0.5 mol of ethanol and 1.0 mol of acetic acid and maintaining it at 293 K, 0.214 mol of ethyl acetate is found after sometime. Has equilibrium been reached?

Discussion

976.	Explain the process of analytic balance
Answer» Explain the process of analytic balance

Discussion

977.	The gases produced when 18 g of carbon reacts with 5 litre of oxygen at 18^†extdegree C and 5 atm pressure are treated with 0.5 litre of 2M NaOH. Calculate the concentration of sodium carbonate and sodium bicarbonate produced by the reaction of CO_2 with NaOH. (CO has no reaction under these conditions)
Answer» The gases produced when 18 g of carbon reacts with 5 litre of oxygen at 18^†extdegree C and 5 atm pressure are treated with 0.5 litre of 2M NaOH. Calculate the concentration of sodium carbonate and sodium bicarbonate produced by the reaction of CO_2 with NaOH. (CO has no reaction under these conditions)

Discussion

978.	Volume of an ideal gas is to be decreased by 10% by increase of pressure by x% under isothermal condition. Thus, x is
Answer» Volume of an ideal gas is to be decreased by 10% by increase of pressure by $x %$ under isothermal condition. Thus, $x$ is

Discussion

979.	At cons†an t pressure, calculate the root mean square velocity of a gas molecule at temperature 27℃ if it rms speed at 0℃is 4 km/
Answer» At cons†an t pressure, calculate the root mean square velocity of a gas molecule at temperature 27℃ if it rms speed at 0℃is 4 km/

Discussion

980.	47. The reagent that can distinguish benzaldehyde from propionaldehyde
Answer» 47. The reagent that can distinguish benzaldehyde from propionaldehyde

Discussion

981.	The factor which is not affecting the conductivity of any solution is
Answer» The factor which is not affecting the conductivity of any solution is

Discussion

982.	WHAT IS PHYSICS ,CHEMISTRY, MATHEMATICS AND IT'S ORIGIN
Answer» WHAT IS PHYSICS ,CHEMISTRY, MATHEMATICS AND IT'S ORIGIN

Discussion

983.	Which of the following molecules has the largest extent of back bonding?
Answer» Which of the following molecules has the largest extent of back bonding?

Discussion

984.	Introduction of a methyl group in ammonia markedly increases the basic strength of ammonia in aq. solution, introduction of the second methyl group increases only marginally the basic strength of methyl amine in water. This is due to.
Answer» Introduction of a methyl group in ammonia markedly increases the basic strength of ammonia in aq. solution, introduction of the second methyl group increases only marginally the basic strength of methyl amine in water. This is due to.

Discussion

985.	Which one of the following compound gives aspirin on reacting with acetic anhydride in presence of H2SO4
Answer» Which one of the following compound gives aspirin on reacting with acetic anhydride in presence of $H_{2} S O_{4}$

Discussion

986.	Is ortho effect applicable for phenol and aniline? What compounds is ortho effect not applicable in?
Answer» Is ortho effect applicable for phenol and aniline? What compounds is ortho effect not applicable in?

Discussion

987.	How optical density is different from mass density?
Answer» How optical density is different from mass density?

Discussion

988.	10. The heat of neutralization of four acids P,Q,R,S are. -13.7,-9.4,-11.2 and -12.4 kcal ,respectively When they are neutralized by a common base .the acidic character obeys the order 1. P> Q >R >S. 2. P> S >R >Q 3. S >R >Q >P. 4 S>Q >R >P
Answer» 10. The heat of neutralization of four acids P,Q,R,S are. -13.7,-9.4,-11.2 and -12.4 kcal ,respectively When they are neutralized by a common base .the acidic character obeys the order 1. P> Q >R >S. 2. P> S >R >Q 3. S >R >Q >P. 4 S>Q >R >P

Discussion

989.	47. Consider the following reaction: Reagents Glucose ------------------->Mannose The above reaction is known as: (a) Anomerisation (b) Racemisation (c) Epimerisation (d) Conversion.
Answer» 47. Consider the following reaction: Reagents Glucose ------------------->Mannose The above reaction is known as: (a) Anomerisation (b) Racemisation (c) Epimerisation (d) Conversion.

Discussion

990.	can ortho,para directing groups can have double bonds?
Answer» can ortho,para directing groups can have double bonds?

Discussion

991.	In basic medium CrO2−4 oxidizes S2O2−3 to form SO2−4 and itself changes into Cr(OH)−4. The volume of 0.154 M CrO2−4 required to react with 40 mL of 0.25 M S2O2−3 is ______ mL.(Rounded off to the nearest integer)
Answer» In basic medium $C r O_{4}^{2 -}$ oxidizes $S_{2} O_{3}^{2 -}$ to form $S O_{4}^{2 -}$ and itself changes into $C r (O H)_{4}^{-} .$ The volume of $0.154 M C r O_{4}^{2 -}$ required to react with $40 m L$ of $0.25 M S_{2} O_{3}^{2 -}$ is ______ $m L$ . (Rounded off to the nearest integer)

Discussion

992.	The root mean square speed of a molecule is given as
Answer» The root mean square speed of a molecule is given as

Discussion

993.	What is kirchoff law
Answer» What is kirchoff law

Discussion

994.	Which of the following solution will have highestspecific conductance?(1) 0.01 M CH3COOH (2) 0.01 M NH4 OH (3)0.01M NaCl(4) 0.01M K2SO
Answer» Which of the following solution will have highestspecific conductance?(1) 0.01 M CH3COOH (2) 0.01 M NH4 OH (3)0.01M NaCl(4) 0.01M K2SO

Discussion

995.	Which of the following reactions are used for the preparation of the halogen acid?
Answer» Which of the following reactions are used for the preparation of the halogen acid?

Discussion

996.	Which of the following statements about the first halogens is(are) accurate?
Answer» Which of the following statements about the first halogens is(are) accurate?

Discussion

997.	48 What will be the % dissociation of 0.1m Mg(oH)2 in 0.05m NaoH
Answer» 48 What will be the % dissociation of 0.1m Mg(oH)2 in 0.05m NaoH

Discussion

998.	The correct increasing order of energy between 8s and 8p orbital are
Answer» The correct increasing order of energy between $8 s$ and $8 p$ orbital are

Discussion

999.	IdentifyA, B, C, D, E, R and R1in the following:
Answer» Identify A, B, C, D, E, R and R¹ in the following:

999.

IdentifyA, B, C, D, E, R and R1in the following:

Answer»

Identify
A, B, C, D, E, R and R¹
in the following:

Discussion

1000.	What volume of 0.1M KOH is needed to completely neutralise the HCl in 300ml of HCl with Ph =2.25
Answer» What volume of 0.1M KOH is needed to completely neutralise the HCl in 300ml of HCl with Ph =2.25

Discussion

Explore topic-wise InterviewSolutions in .

Aniline when diazotised in cold and then treated with N, N– dimethyl aniline, gives a colored product. Its structure would be

10.Kp is how many times equal to Kc for the given reaction? N2(g)+3H2(g)=2NH3(g)

A 5kg block of iron is heated to 800^0C.It is placed in a tub containing 2 litre of water at 15^0C.Assuming all the water is brought to boil rapidly;calculate the mass of water which boils off.

what is the difference between isobutyl and secondary butyl

Sar how to find the colour of any compound

Give reasons : (a) E∘ value for Mn3+/Mn2+ couple is much more positive than that for Fe3+/Fe2+. (b) Iron has higher enthalpy of atomization than that of copper. (c) Sc3+ is colourless in aqueous solution whereas Ti3+ is coloured.

How do find the number of spectral lines explain with formula derievation

1.725 g of a metal carbonate is mixed with 300 ml of N/10 HCl. 10 ml of N/2 sodium hydroxide were required to neutralise excess of acid. Calculate the equivalent mass of metal carbonate.

Which of the following is true for a monoclinic system:

One of the following amide will not undergo Hoffmann bromamide reaction:

The enthalpy of vapourisation of water is 186.5 KJ/mol,then what is it's entropy of vapourisation

What is catiolist?

What will be the products in the following r×n : ifentify2 nitroaniline ----Ac2O----:A::A:-----Br2/CH3COOH------- :B: :B:-----H2O/H+------:C::C:-----NaNO2/HCL/∆ ---- :D::D:------ EtOH/∆-------:E:Identify A , B , C ,D ,E

Why butane has only 2 isomers n butane or isobutane what will happen if we tie one carbon atom to first carbon atom then it will have 3 isomers

Hybridization scheme of [Fe(H²O)5(NO+)]+²Which ligand will enter inner d orbital

The oxide which has highest acidic charcter is and explain why is it so ? (1) MnO (2) MnO_2 (3) Mn_2O_3 (4) Equal in all of these

if a metallic oxide M_2O_3 contains 20% O_2 then equicalent weight of M will be

How are tetrahedral and octahedral voids calculated by seeing the rank of the CCP ?

Arrange the following reaction mechanism of sulphonation of benzene

What is the difference between dispersal phase and solute? and also What is the difference between dispersal medium and solvent? Are not they same?

34. Which is the predominant product formed on reaction of CH3CH2CH2Cl with Mg in the presence of dry ether: A) CH3CH2CH2MgCl OR B) (CH3)2CHMgCl

Match the species in Column I with the shape in Column II.Column IColumn IIi.OSF2p.Tetrahedralii.O2SF2q.Lineariii.XeF4r.Square planariv.ClO−4s.Trigonal pyramidalv.I−3t.See - saw

Explain the process of analytic balance

Volume of an ideal gas is to be decreased by 10% by increase of pressure by x% under isothermal condition. Thus, x is

At cons†an t pressure, calculate the root mean square velocity of a gas molecule at temperature 27℃ if it rms speed at 0℃is 4 km/

47. The reagent that can distinguish benzaldehyde from propionaldehyde

The factor which is not affecting the conductivity of any solution is

WHAT IS PHYSICS ,CHEMISTRY, MATHEMATICS AND IT'S ORIGIN

Which of the following molecules has the largest extent of back bonding?

Introduction of a methyl group in ammonia markedly increases the basic strength of ammonia in aq. solution, introduction of the second methyl group increases only marginally the basic strength of methyl amine in water. This is due to.

Which one of the following compound gives aspirin on reacting with acetic anhydride in presence of H2SO4

Is ortho effect applicable for phenol and aniline? What compounds is ortho effect not applicable in?

How optical density is different from mass density?

10. The heat of neutralization of four acids P,Q,R,S are. -13.7,-9.4,-11.2 and -12.4 kcal ,respectively When they are neutralized by a common base .the acidic character obeys the order 1. P> Q >R >S. 2. P> S >R >Q 3. S >R >Q >P. 4 S>Q >R >P

47. Consider the following reaction: Reagents Glucose ------------------->Mannose The above reaction is known as: (a) Anomerisation (b) Racemisation (c) Epimerisation (d) Conversion.

can ortho,para directing groups can have double bonds?

In basic medium CrO2−4 oxidizes S2O2−3 to form SO2−4 and itself changes into Cr(OH)−4. The volume of 0.154 M CrO2−4 required to react with 40 mL of 0.25 M S2O2−3 is ______ mL.(Rounded off to the nearest integer)

The root mean square speed of a molecule is given as

What is kirchoff law

Which of the following solution will have highestspecific conductance?(1) 0.01 M CH3COOH (2) 0.01 M NH4 OH (3)0.01M NaCl(4) 0.01M K2SO

Which of the following reactions are used for the preparation of the halogen acid?

Which of the following statements about the first halogens is(are) accurate?

48 What will be the % dissociation of 0.1m Mg(oH)2 in 0.05m NaoH

The correct increasing order of energy between 8s and 8p orbital are

IdentifyA, B, C, D, E, R and R1in the following:

What volume of 0.1M KOH is needed to completely neutralise the HCl in 300ml of HCl with Ph =2.25