46295 + Interview Questions in Chemistry Page 22 InterviewSolution

1051.	84.Find the decreasing order of bond strength F-F,C-C,H-H,N-N,O-O
Answer» 84.Find the decreasing order of bond strength F-F,C-C,H-H,N-N,O-O

Discussion

1052.	Observe the given reaction carefully and identify (i) , (ii), (iii) and (iv).
Answer» Observe the given reaction carefully and identify (i) , (ii), (iii) and (iv).

Discussion

1053.	In the organic compound CH2=CH–CH2–CH2–C≡CH, the pair of hydridised orbitals involved in the formation of: C2 – C3 bond is:(a) sp – sp2(b) sp – sp3(c) sp2 – sp3 (d) sp3– sp3
Answer» In the organic compound CH₂=CH–CH₂–CH₂–C≡CH, the pair of hydridised orbitals involved in the formation of: C₂ – C₃ bond is: (a) sp – sp²(b) sp – sp³(c) sp² – sp³ (d) sp³– sp³

1053.

In the organic compound CH2=CH–CH2–CH2–C≡CH, the pair of hydridised orbitals involved in the formation of: C2 – C3 bond is:(a) sp – sp2(b) sp – sp3(c) sp2 – sp3 (d) sp3– sp3

Answer»

In the organic compound CH₂=CH–CH₂–CH₂–C≡CH, the pair of hydridised orbitals involved in the formation of: C₂ – C₃ bond is:

(a) sp – sp²(b) sp – sp³(c) sp² – sp³ (d) sp³– sp³

Discussion

1054.	At 298 K the standard free energy of formation of H2O(l) is −257.20 kJ/mole while that of its ionization into H+ ion and hydroxyl ions is 80.35 kJ/mole. Then the emf of the following cell at 298 K will be (take F=96500 C): H2(g, 1 bar)\|H+(1M)\|\|OH−(1M)\|O2(g, 1 bar)
Answer» At $298 K$ the standard free energy of formation of $H_{2} O (l)$ is $- 257.20 kJ/mole$ while that of its ionization into $H^{+}$ ion and hydroxyl ions is $80.35 kJ/mole$ . Then the emf of the following cell at $298 K$ will be $(take F = 96500 C)$ : $H_{2} (g, 1 bar) \| H^{+} (1 M) \| \| O H^{-} (1 M) \| O_{2} (g, 1 bar)$

Discussion

1055.	49 Strength of H2O2 is 15.18 g/L , then it is equal to:-
Answer» 49 Strength of H2O2 is 15.18 g/L , then it is equal to:-

Discussion

1056.	If 20.0 g of CaCO3 is treated with 20.0 g of HCl, how many grams of CO2 can be obtained according to the following reaction:CaCO3(s)+2HCl(aq)⟶CaCl2(aq)+H2O(l)+CO2(g)
Answer» If $20.0 g$ of $C a C O_{3}$ is treated with $20.0 g$ of $H C l$ , how many grams of $C O_{2}$ can be obtained according to the following reaction: $C a C O_{3} (s) + 2 H C l (a q) ⟶ C a C l_{2} (a q) + H_{2} O (l) + C O_{2} (g)$

Discussion

1057.	Standad Gibbs energy of the reaction, ΔrGo at a certain temperature can be computed as ΔrGo=ΔrHo−TΔrSo and the change in the value of ΔrHo and ΔrSo for a reaction with temperature can be copmuted as follows : ΔrHoT2−ΔrHoT1=ΔrCop(T2−T1) ΔrSoT2−ΔrSoT1=ΔrCoplnT2T1 ΔrGo=ΔrHo−TΔrSo and by ΔrGo=−RTlnKeq Consider the following reaction, CO(g)+2H2(g)⇌CH3OH(g) Given : ΔfHo(CH3OH(g))=−201 kJ mol−1 ΔfHo(CO(g))=−114 kJ mol−1 So(CH3OH(g))=240 kJ mol−1 So(H2(g))=29 J K−1 mol−1 So(CO(g))=198 J mol−1 K−1 Cop, m(H2)=28.8 J/mol-K Cop, m(CO)=29.4 J/mol-K Cop, m(CH3OH)=44 J/mol-K and ln(320300)=0.06 All data were taken at 300 K. The ΔrGo (in kJ/mol) at 320 K is −x. Find the value of x. (Report the answer to the closest integer)
Answer» Standad Gibbs energy of the reaction, $Δ_{r} G^{o}$ at a certain temperature can be computed as $Δ_{r} G^{o} = Δ_{r} H^{o} - T Δ_{r} S^{o}$ and the change in the value of $Δ_{r} H^{o}$ and $Δ_{r} S^{o}$ for a reaction with temperature can be copmuted as follows : $Δ_{r} H_{T_{2}}^{o} - Δ_{r} H_{T_{1}}^{o} = Δ_{r} C_{p}^{o} (T_{2} - T_{1})$ $Δ_{r} S_{T_{2}}^{o} - Δ_{r} S_{T_{1}}^{o} = Δ_{r} C_{p}^{o} l n \frac{T_{2}}{T_{1}}$ $Δ_{r} G^{o} = Δ_{r} H^{o} - T Δ_{r} S^{o}$ and by $Δ_{r} G^{o} = - R T l n K_{e q}$ Consider the following reaction, $C O (g) + 2 H_{2} (g) ⇌ C H_{3} O H (g)$ Given : $Δ_{f} H^{o} (C H_{3} O H (g)) = - 201 {kJ mol}^{- 1}$ $Δ_{f} H^{o} (C O (g)) = - 114 {kJ mol}^{- 1}$ $S^{o} (C H_{3} O H (g)) = 240 {kJ mol}^{- 1}$ $S^{o} (H_{2} (g)) = 29 {J K}^{- 1} {mol}^{- 1}$ $S^{o} (C O (g)) = 198 {J mol}^{- 1} K^{- 1}$ $C_{p, m}^{o} (H_{2}) = 28.8 J/mol-K$ $C_{p, m}^{o} (C O) = 29.4 J/mol-K$ $C_{p, m}^{o} (C H_{3} O H) = 44 J/mol-K$ and $l n (\frac{320}{300}) = 0.06$ All data were taken at $300 K$ . The $Δ_{r} G^{o} (in kJ/mol)$ at $320 K$ is $- x$ . Find the value of $x$ . (Report the answer to the closest integer)

Discussion

1058.	Which one of the following has the highest molar conductivity ?(1) Diamminedichloroplatinum(II)(2) Tetraamminedichlorocobalt(III)(3) Potassium hexacyanoferrate(II)(4) Hexaaquochromium(III)bromide
Answer» Which one of the following has the highest molar conductivity ? (1) Diamminedichloroplatinum(II) (2) Tetraamminedichlorocobalt(III) (3) Potassium hexacyanoferrate(II) (4) Hexaaquochromium(III)bromide

Discussion

1059.	Statements: E M, M * H, H © G Conclusions: I. G M II. G E
Answer» Statements: E M, M * H, H © G Conclusions: I. G M II. G E

1059.

Statements: E M, M * H, H © G Conclusions: I. G M II. G E

Answer»

Statements: E M, M * H, H © G

Conclusions:

I. G M

II. G E

Discussion

1060.	400 mg of calcium atoms are removed from 0.1 mol of calcum and remaining amount is made to react with oxygen how much pxygen atoms are involved in formation of calcium oxid
Answer» 400 mg of calcium atoms are removed from 0.1 mol of calcum and remaining amount is made to react with oxygen how much pxygen atoms are involved in formation of calcium oxid

Discussion

1061.	Howlong can an electric lamp of 100W be kept glowing by fusion of 2.0 kgof deuterium? Take the fusion reaction as
Answer» How long can an electric lamp of 100W be kept glowing by fusion of 2.0 kg of deuterium? Take the fusion reaction as

1061.

Howlong can an electric lamp of 100W be kept glowing by fusion of 2.0 kgof deuterium? Take the fusion reaction as

Answer»

How
long can an electric lamp of 100W be kept glowing by fusion of 2.0 kg
of deuterium? Take the fusion reaction as

Discussion

1062.	Illustratewith examples the limitations of Williamson synthesis for thepreparation of certain types of ethers.
Answer» Illustrate with examples the limitations of Williamson synthesis for the preparation of certain types of ethers.

Discussion

1063.	Depression in freezing point is maximum for:
Answer» Depression in freezing point is maximum for:

1063.

Depression in freezing point is maximum for:

Answer»

Depression in freezing point is maximum for:

Discussion

1064.	20ml of .2M al2(so)4 is mixed with 20ml of 6.6M bacl 2 the concentration of cl- ion in solution
Answer» 20ml of .2M al2(so)4 is mixed with 20ml of 6.6M bacl 2 the concentration of cl- ion in solution

Discussion

1065.	in Mg/Mg2+//Ag+/Ag what happens to E cell if [Ag+] increases/decreases and what happens to E cell if [Mg2+] increases/ decreases
Answer» in Mg/Mg2+//Ag+/Ag what happens to E cell if [Ag+] increases/decreases and what happens to E cell if [Mg2+] increases/ decreases

Discussion

1066.	a 0.2 molar solution of formic acid is 3.2% ionized the ionizaton cons†an t is
Answer» a 0.2 molar solution of formic acid is 3.2% ionized the ionizaton cons†an t is

Discussion

1067.	how many pi bonds are there in 88g of carbondi oxide.
Answer» how many pi bonds are there in 88g of carbondi oxide.

Discussion

1068.	Which of the following plots is (are) correct for the given reaction? ([P]0 is the initial concentration of P)
Answer» Which of the following plots is (are) correct for the given reaction? ( $[P]_{0}$ is the initial concentration of P)

Discussion

1069.	Propane can be best prepared by the reaction
Answer» Propane can be best prepared by the reaction

Discussion

1070.	What will be the simplest formula of the comopund if in a crystalline solid, atoms of X form fcc packing and the atoms of Y occupy all the octahedral voids?
Answer» What will be the simplest formula of the comopund if in a crystalline solid, atoms of X form fcc packing and the atoms of Y occupy all the octahedral voids?

Discussion

1071.	What is the percentage of enantiomeric excess of a mixture containing 12.8 mol (R)-2-bromobutane and 3.2 mol (S)-2-bromobutane?
Answer» What is the percentage of enantiomeric excess of a mixture containing 12.8 mol (R)-2-bromobutane and 3.2 mol (S)-2-bromobutane?

Discussion

1072.	36.Calculate the ratio of frequency of electron in an orbit for 2nd shell of Li+2 to 3rd shell of He+ ion?
Answer» 36.Calculate the ratio of frequency of electron in an orbit for 2nd shell of Li+2 to 3rd shell of He+ ion?

Discussion

1073.	Which of the following was not proposed by Thomson in his model?
Answer» Which of the following was not proposed by Thomson in his model?

Discussion

1074.	One electrolysing K2SO4 solution using inert electrodes, 1.68L (STP) of gases was obtained. How many moles of MnO−4 could be reduced to Mn2+ by the same quantity of electricity ?
Answer» One electrolysing $K_{2} S O_{4}$ solution using inert electrodes, 1.68L (STP) of gases was obtained. How many moles of $M n O_{4}^{-}$ could be reduced to $M n^{2 +}$ by the same quantity of electricity ?

Discussion

1075.	What is entropy
Answer» What is entropy

Discussion

1076.	In end centered unit cell whether it is necessary that 2 face centred particles should be at bottom and top faces?
Answer» In end centered unit cell whether it is necessary that 2 face centred particles should be at bottom and top faces?

Discussion

1077.	3. Do we write valency with any negative or positive signs?
Answer» 3. Do we write valency with any negative or positive signs?

Discussion

1078.	Why ch4 is non-polar?
Answer» Why ch4 is non-polar?

Discussion

1079.	1gram of a carbonate (M2CO3) on treatment with excess HCl produces 0.01186 mole of CO2, the molar mass of M2CO3 in g mol-1 is
Answer» 1gram of a carbonate (M2CO3) on treatment with excess HCl produces 0.01186 mole of CO2, the molar mass of M2CO3 in g mol-1 is

Discussion

1080.	If,find.
Answer» If, find.

Discussion

1081.	The half life of Bi210 in 5 days In how much time (7/8)th part of a sample will decay?
Answer» The half life of Bi210 in 5 days In how much time (7/8)th part of a sample will decay?

Discussion

1082.	Number of bridging CO ligands in [Mn2(CO)10] is _____.
Answer» Number of bridging $C O$ ligands in $[M n_{2} {(C O)}_{10}]$ is _____.

Discussion

1083.	The sum of all sp3, sp2 and sp units present in solid PCl5, solid PBr5, and solid N2O5 are :
Answer» The sum of all $s p^{3}, s p^{2} a n d s p$ units present in solid $P C l_{5}$ , solid $P B r_{5}$ , and solid $N_{2} O_{5}$ are :

Discussion

1084.	Benzene reacts with CH3COCl in the presence of anhydrous AlCl3 to give
Answer» Benzene reacts with $C H_{3} C O C l$ in the presence of anhydrous $A l C l_{3}$ to give

Discussion

1085.	what is the covalency of nitrogen
Answer» what is the covalency of nitrogen

Discussion

1086.	Identify compound X in the following sequences of reactions.
Answer» Identify compound X in the following sequences of reactions.

Discussion

1087.	two atoms of the hydrogen are located at position r and r' .Find the centre of mass.
Answer» two atoms of the hydrogen are located at position r and r' .Find the centre of mass.

Discussion

1088.	What is the difference between homogeneous and heterogeneous mixture?
Answer» What is the difference between homogeneous and heterogeneous mixture?

Discussion

1089.	How much amount of NH3 is produced when 28 g of nitrogen react with 6 g of hydrogen?34
Answer» How much amount of $N H_{3}$ is produced when 28 g of nitrogen react with 6 g of hydrogen? 34

Discussion

1090.	Question 53 Assertion (A) When NaCl is added to water a depression in freezing point is observed. Reason (R) The Lowering of vapour pressure of a solution causes depression in the freezing point.
Answer» Question 53 Assertion (A) When NaCl is added to water a depression in freezing point is observed. Reason (R) The Lowering of vapour pressure of a solution causes depression in the freezing point.

Discussion

1091.	Write some applications of compressibility of gases.
Answer» Write some applications of compressibility of gases.

Discussion

1092.	what is the final temperature of 0.10 molemonoatomic ideal gas that performs 75 cal of work adiabatically if the initial temperature is 227^° C? (use R= 2 cal/Kmol)
Answer» what is the final temperature of 0.10 molemonoatomic ideal gas that performs 75 cal of work adiabatically if the initial temperature is 227^° C? (use R= 2 cal/Kmol)

Discussion

1093.	Copper crystallises in a structure of face centered cubic unit cell. The atomic radius of copper is 1.28 A∘. What is edge length of the unit cell?
Answer» Copper crystallises in a structure of face centered cubic unit cell. The atomic radius of copper is $1.28$ $A^{\circ}$ . What is edge length of the unit cell?

Discussion

1094.	The precipitate of CaF2 with Ksp equal to 1.7×10−10 is obtained when equal volumes of the following are mixed?
Answer» The precipitate of $C a F_{2}$ with $K_{s p}$ equal to $1.7 \times 10^{- 10}$ is obtained when equal volumes of the following are mixed?

Discussion

1095.	CsBr has bcc structure with edge length 4.3 Ao. The shortest interionic distance ( in Ao) in between Cs+ and Br− is:(Give your answer upto two decimal only)
Answer» $C s B r$ has bcc structure with edge length $4.3 A^{o}$ . The shortest interionic distance ( in $A^{o}$ ) in between $C s^{+}$ and $B r^{-}$ is:(Give your answer upto two decimal only)

Discussion

1096.	The reaction of D-glucose with ammonical AgNO3 produces:
Answer» The reaction of D-glucose with ammonical $A g N O_{3}$ produces:

Discussion

1097.	ntq) CH3Cl2 will be called Methylene chloride or Methylidene chloriden
Answer» ntq) CH3Cl2 will be called Methylene chloride or Methylidene chloriden

Discussion

1098.	Suggest a reason as to why CO is poisonous.
Answer» Suggest a reason as to why CO is poisonous.

Discussion

1099.	Piezoelectric crystals are used in
Answer» Piezoelectric crystals are used in

Discussion

1100.	An alkene occupies 0.4 L g−1 at STP. The number of hydrogen atoms in one formula unit of the alkene is:
Answer» An alkene occupies $0.4 {L g}^{- 1}$ at STP. The number of hydrogen atoms in one formula unit of the alkene is:

Discussion

Explore topic-wise InterviewSolutions in .

84.Find the decreasing order of bond strength F-F,C-C,H-H,N-N,O-O

Observe the given reaction carefully and identify (i) , (ii), (iii) and (iv).

In the organic compound CH2=CH–CH2–CH2–C≡CH, the pair of hydridised orbitals involved in the formation of: C2 – C3 bond is:(a) sp – sp2(b) sp – sp3(c) sp2 – sp3 (d) sp3– sp3

At 298 K the standard free energy of formation of H2O(l) is −257.20 kJ/mole while that of its ionization into H+ ion and hydroxyl ions is 80.35 kJ/mole. Then the emf of the following cell at 298 K will be (take F=96500 C): H2(g, 1 bar)|H+(1M)||OH−(1M)|O2(g, 1 bar)

49 Strength of H2O2 is 15.18 g/L , then it is equal to:-

If 20.0 g of CaCO3 is treated with 20.0 g of HCl, how many grams of CO2 can be obtained according to the following reaction:CaCO3(s)+2HCl(aq)⟶CaCl2(aq)+H2O(l)+CO2(g)

Which one of the following has the highest molar conductivity ?(1) Diamminedichloroplatinum(II)(2) Tetraamminedichlorocobalt(III)(3) Potassium hexacyanoferrate(II)(4) Hexaaquochromium(III)bromide

Statements: E M, M * H, H © G Conclusions: I. G M II. G E

400 mg of calcium atoms are removed from 0.1 mol of calcum and remaining amount is made to react with oxygen how much pxygen atoms are involved in formation of calcium oxid

Howlong can an electric lamp of 100W be kept glowing by fusion of 2.0 kgof deuterium? Take the fusion reaction as

Illustratewith examples the limitations of Williamson synthesis for thepreparation of certain types of ethers.

Depression in freezing point is maximum for:

20ml of .2M al2(so)4 is mixed with 20ml of 6.6M bacl 2 the concentration of cl- ion in solution

in Mg/Mg2+//Ag+/Ag what happens to E cell if [Ag+] increases/decreases and what happens to E cell if [Mg2+] increases/ decreases

a 0.2 molar solution of formic acid is 3.2% ionized the ionizaton cons†an t is

how many pi bonds are there in 88g of carbondi oxide.

Which of the following plots is (are) correct for the given reaction? ([P]0 is the initial concentration of P)

Propane can be best prepared by the reaction

What will be the simplest formula of the comopund if in a crystalline solid, atoms of X form fcc packing and the atoms of Y occupy all the octahedral voids?

What is the percentage of enantiomeric excess of a mixture containing 12.8 mol (R)-2-bromobutane and 3.2 mol (S)-2-bromobutane?

36.Calculate the ratio of frequency of electron in an orbit for 2nd shell of Li+2 to 3rd shell of He+ ion?

Which of the following was not proposed by Thomson in his model?

One electrolysing K2SO4 solution using inert electrodes, 1.68L (STP) of gases was obtained. How many moles of MnO−4 could be reduced to Mn2+ by the same quantity of electricity ?

What is entropy

In end centered unit cell whether it is necessary that 2 face centred particles should be at bottom and top faces?

3. Do we write valency with any negative or positive signs?

Why ch4 is non-polar?

1gram of a carbonate (M2CO3) on treatment with excess HCl produces 0.01186 mole of CO2, the molar mass of M2CO3 in g mol-1 is

If,find.

The half life of Bi210 in 5 days In how much time (7/8)th part of a sample will decay?

Number of bridging CO ligands in [Mn2(CO)10] is _____.

The sum of all sp3, sp2 and sp units present in solid PCl5, solid PBr5, and solid N2O5 are :

Benzene reacts with CH3COCl in the presence of anhydrous AlCl3 to give

what is the covalency of nitrogen

Identify compound X in the following sequences of reactions.

two atoms of the hydrogen are located at position r and r' .Find the centre of mass.

What is the difference between homogeneous and heterogeneous mixture?

How much amount of NH3 is produced when 28 g of nitrogen react with 6 g of hydrogen?34

Question 53 Assertion (A) When NaCl is added to water a depression in freezing point is observed. Reason (R) The Lowering of vapour pressure of a solution causes depression in the freezing point.

Write some applications of compressibility of gases.

what is the final temperature of 0.10 molemonoatomic ideal gas that performs 75 cal of work adiabatically if the initial temperature is 227^° C? (use R= 2 cal/Kmol)

Copper crystallises in a structure of face centered cubic unit cell. The atomic radius of copper is 1.28 A∘. What is edge length of the unit cell?

The precipitate of CaF2 with Ksp equal to 1.7×10−10 is obtained when equal volumes of the following are mixed?

CsBr has bcc structure with edge length 4.3 Ao. The shortest interionic distance ( in Ao) in between Cs+ and Br− is:(Give your answer upto two decimal only)

The reaction of D-glucose with ammonical AgNO3 produces:

ntq) CH3Cl2 will be called Methylene chloride or Methylidene chloriden

Suggest a reason as to why CO is poisonous.

Piezoelectric crystals are used in

An alkene occupies 0.4 L g−1 at STP. The number of hydrogen atoms in one formula unit of the alkene is: