1708 + Interview Questions in Chemistry Page 8 InterviewSolution

351.	Bakelite is formed by polymerisation between
Answer» Bakelite is formed by polymerisation between

Discussion

352.	The number of radial nodes and angular nodes for d-orbital can be represented as:
Answer» The number of radial nodes and angular nodes for d-orbital can be represented as:

Discussion

353.	For a reaction:3A→ productsIt is found that the rate of reaction doubles when the concentration of A is increased by four times. What is the order of the reaction?
Answer» For a reaction: $3 A \to$ products It is found that the rate of reaction doubles when the concentration of $A$ is increased by four times. What is the order of the reaction?

Discussion

354.	What is mole fraction represented by?
Answer» What is mole fraction represented by?

Discussion

355.	The energy of an electron in the second and the third Bohr's orbits of the hydrogen atom is −5.42×10−12 erg and −2.41×10−12 erg respectively. Calculate the wavelength of the emitted radiation when the electron drops from the third orbit to the second orbit.
Answer» The energy of an electron in the second and the third Bohr's orbits of the hydrogen atom is $- 5.42 \times 10^{- 12}$ erg and $- 2.41 \times 10^{- 12}$ erg respectively. Calculate the wavelength of the emitted radiation when the electron drops from the third orbit to the second orbit.

Discussion

356.	Which of the following statements about the composition of the vapour over an ideal 1: 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at 25∘C. (Given,vapour pressure data at 25∘C. benzene = 12.8 kPa, toluene = 3.85 kPa )
Answer» Which of the following statements about the composition of the vapour over an ideal 1: 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at $25^{\circ} C$ . (Given,vapour pressure data at $25^{\circ} C$ . benzene = 12.8 kPa, toluene = 3.85 kPa )

Discussion

357.	Arrange the following compounds in the increasing order of polarity.
Answer» Arrange the following compounds in the increasing order of polarity.

Discussion

358.	Li and a proton are accelerated by the same potential then their de Broglie wavelengths λLi and λp have the ratio (assume mLi=9mp)
Answer» Li and a proton are accelerated by the same potential then their de Broglie wavelengths $λ_{L i} a n d λ_{p}$ have the ratio (assume $m_{L i} = 9_{m_{p}})$

Discussion

359.	Which ester given below can most easily be produced by acid catalysed esterification (Fischer's esterification)?
Answer» Which ester given below can most easily be produced by acid catalysed esterification (Fischer's esterification)?

Discussion

360.	Which of the following will not produce hydrogen gas?
Answer» Which of the following will not produce hydrogen gas?

Discussion

361.	Which one of the following is not a hydrocarbon?
Answer» Which one of the following is not a hydrocarbon?

Discussion

362.	Orlon is a polymer is
Answer» Orlon is a polymer is

Discussion

363.	The relationship between molality (m) and mole fraction (χA) of the solvent is:
Answer» The relationship between molality (m) and mole fraction $(χ_{A})$ of the solvent is:

Discussion

364.	Which of the following represents the least number of molecules?
Answer» Which of the following represents the least number of molecules?

Discussion

365.	Element ‘B’ forms ccp structure and ‘A’ occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral voids. The structure of bimetallic oxide is:
Answer» Element ‘B’ forms ccp structure and ‘A’ occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral voids. The structure of bimetallic oxide is:

Discussion

366.	A 0.001 molal solution of [Pt(NH3)4cl4] in water had a freezing point depression of 0.0054∘. If Kf for water is 1.80, the correct formulation for the above molecule is
Answer» A 0.001 molal solution of $[P t (N H_{3})_{4} c l_{4}]$ in water had a freezing point depression of ${0.0054}^{\circ}$ . If $K_{f}$ for water is 1.80, the correct formulation for the above molecule is

Discussion

367.	H3C−CH2−C\|CH3=CH2+HBr→AA (predominantly) is
Answer» $H_{3} C - C H_{2} - C \| C H_{3} = C H_{2} + H B r \to A$ A (predominantly) is

Discussion

368.	The H-like species Li2+ is in spherically symmetrical state S1 and one radial node. Upon absorbing light, the ion undergoes transition to state S2. The state S2 has one radial node and it has the same energy as the ground state energy of a hydrogen atom.The orbital angular momentum quantum number of state S2 is:
Answer» The $H$ -like species $L i^{2 +}$ is in spherically symmetrical state $S_{1}$ and one radial node. Upon absorbing light, the ion undergoes transition to state $S_{2}$ . The state $S_{2}$ has one radial node and it has the same energy as the ground state energy of a $h y d r o g e n$ atom. The orbital angular momentum quantum number of state $S_{2}$ is:

368.

The H-like species Li2+ is in spherically symmetrical state S1 and one radial node. Upon absorbing light, the ion undergoes transition to state S2. The state S2 has one radial node and it has the same energy as the ground state energy of a hydrogen atom.The orbital angular momentum quantum number of state S2 is:

Answer»

The $H$ -like species $L i^{2 +}$ is in spherically symmetrical state $S_{1}$ and one radial node. Upon absorbing light, the ion undergoes transition to state $S_{2}$ . The state $S_{2}$ has one radial node and it has the same energy as the ground state energy of a $h y d r o g e n$ atom.

The orbital angular momentum quantum number of state $S_{2}$ is:

Discussion

369.	To maintain the pH of 7.4 for blood at normal condition which is 2 M in H2CO3 (at equilibrium), what volume of 7.8 M NaHCO3 solution is required to mix with 10 mL of blood?Given: K(H2CO3)=7.8×10−7; 107.4=2.511×107
Answer» To maintain the $p H$ of $7.4$ for blood at normal condition which is $2 M$ in $H_{2} C O_{3}$ (at equilibrium), what volume of $7.8 M N a H C O_{3}$ solution is required to mix with $10 mL$ of blood? $Given : K (H_{2} C O_{3}) = 7.8 \times 10^{- 7}; 10^{7.4} = 2.511 \times 10^{7}$

Discussion

370.	The drain cleaner, Drainex contains small bits of aluminum which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20∘C and one bar will be released when 0.15 g aluminum is allowed to react?
Answer» The drain cleaner, Drainex contains small bits of aluminum which react with caustic soda to produce dihydrogen. What volume of dihydrogen at $20^{\circ} C$ and one bar will be released when $0.15 g$ aluminum is allowed to react?

Discussion

371.	The basis of C-14 dating method is that the:
Answer» The basis of C-14 dating method is that the:

Discussion

372.	Analyze the generalized rate data for the reactionRX+Nu−⟶ Nucleophilic ProductS. No.[RX]Substrate[Nu] Attacking speciesRate of reaction(Ms−1)1.0.10 M0.10 M1.2×10−42.0.20 M0.10 M2.4×10−43.0.10 M0.20 M2.4×10−44.0.20 M0.20 M4.8×10−4Which of the following is the most appropriate potential energy v/s reaction coordinate diagram of the reaction on the basis of above data analysis?
Answer» Analyze the generalized rate data for the reaction $R X + N u^{-} ⟶$ Nucleophilic Product $\begin{matrix} S. No. & [RX]Substrate & [Nu] Attacking species & Rate of reaction (M s^{- 1}) 1. & 0.10 M & 0.10 M & 1.2 \times 10^{- 4} 2. & 0.20 M & 0.10 M & 2.4 \times 10^{- 4} 3. & 0.10 M & 0.20 M & 2.4 \times 10^{- 4} 4. & 0.20 M & 0.20 M & 4.8 \times 10^{- 4} \end{matrix}$ Which of the following is the most appropriate potential energy v/s reaction coordinate diagram of the reaction on the basis of above data analysis?

Discussion

373.	Dehydrohalogenation of an alkyl halide is a/an?
Answer» Dehydrohalogenation of an alkyl halide is a/an?

Discussion

374.	On heating 0.199 g of a metallic oxide in a stream of hydrogen, 0.045 g of water is formed. Find the equivalent weight of the metal.
Answer» On heating $0.199 g$ of a metallic oxide in a stream of hydrogen, $0.045 g$ of water is formed. Find the equivalent weight of the metal.

Discussion

375.	Which of the following is homocyclic?
Answer» Which of the following is homocyclic?

Discussion

376.	The number of bond pairs and lone pairs in H2O are _____ & _____ respectively.
Answer» The number of bond pairs and lone pairs in $H_{2} O$ are _____ & _____ respectively.

Discussion

377.	In the reversible reaction A + B ⇌ C + D, the concentration of each C and D at equilibrium was 0.8 mole/litre, then the equilibrium constant KC will be
Answer» In the reversible reaction A + B $⇌$ C + D, the concentration of each C and D at equilibrium was 0.8 mole/litre, then the equilibrium constant $K_{C}$ will be

377.

In the reversible reaction A + B ⇌ C + D, the concentration of each C and D at equilibrium was 0.8 mole/litre, then the equilibrium constant KC will be

Answer»

In the reversible reaction A + B $⇌$ C + D, the concentration of each C and D at

equilibrium was 0.8 mole/litre, then the equilibrium constant $K_{C}$ will be

Discussion

378.	The number of radial nodes in 5d orbital is:
Answer» The number of radial nodes in $5 d$ orbital is:

Discussion

379.	Which of the following reaction will give an alkyne?
Answer» Which of the following reaction will give an alkyne?

Discussion

380.	Sodium nitrate decomposes above −800oC to give (IIT-JEE, 1998)
Answer» Sodium nitrate decomposes above $- 800^{o} C$ to give (IIT-JEE, 1998)

Discussion

381.	Which of the following set has the strongest tendency to form anions
Answer» Which of the following set has the strongest tendency to form anions

Discussion

382.	When treated with ammoniacal cuprous chloride, which one among the following forms copper derivative
Answer» When treated with ammoniacal cuprous chloride, which one among the following forms copper derivative

Discussion

383.	At room temperature and under normal conditions, oxygen is a ___ while the other chalcogens are ___.
Answer» At room temperature and under normal conditions, oxygen is a ___ while the other chalcogens are ___.

Discussion

384.	What is the appropriate order of processes for the extraction of lead from Galena?A) Froth flotation B) Calcination C) Roasting D) Self Reduction E) Electrolytic Reduction F) Smelting
Answer» What is the appropriate order of processes for the extraction of lead from Galena? A) Froth flotation B) Calcination C) Roasting D) Self Reduction E) Electrolytic Reduction F) Smelting

Discussion

385.	At low pressures (For 1 mole), the van der Waals equation is written as [p+aV2]V=RT The compressibility factor is then equal to:
Answer» At low pressures (For 1 mole), the van der Waals equation is written as $[p + \frac{a}{V^{2}}] V = R T$ The compressibility factor is then equal to:

Discussion

386.	Which of the following compounds can readily give precipitate with AgClO4?
Answer» Which of the following compounds can readily give precipitate with $A g C l O_{4}$ ?

Discussion

387.	An alkene 'X' of the formula C4H8 on ozonolysis produced acetone and formaldehyde. The product obtained when 'X' reacts with HBr is
Answer» An alkene 'X' of the formula $C_{4} H_{8}$ on ozonolysis produced acetone and formaldehyde. The product obtained when 'X' reacts with HBr is

Discussion

388.	The electrons identified by quantum numbers n and l:(P) n = 5, l = 1 (Q) n = 3, l = 0(R) n = 4, l = 2 (S) n = 2, l = 1can be placed in decreasing order of energy as :
Answer» The electrons identified by quantum numbers n and l: (P) n = 5, l = 1 (Q) n = 3, l = 0 (R) n = 4, l = 2 (S) n = 2, l = 1 can be placed in decreasing order of energy as :

Discussion

389.	The rise in the boiling point of a solution containing 1.8 gram of glucose in 100g of a solvent in 0.10C. The molal elevation constant of the liquid is
Answer» The rise in the boiling point of a solution containing 1.8 gram of glucose in 100g of a solvent in 0.1⁰C. The molal elevation constant of the liquid is

Discussion

390.	Calculate the percentage of available chlorine in a sample of 3.546 g of bleaching powder which was dissolved in 100 mL of water, 25 mL of this solution, when treated with acetic acid and excess KI , required 20 mL of 0.125 N sodium thiosulphate solution.
Answer» Calculate the percentage of available chlorine in a sample of $3.546 g$ of bleaching powder which was dissolved in $100 m L$ of water, $25 m L$ of this solution, when treated with acetic acid and excess $K I$ , required $20 m L o f 0.125 N$ sodium thiosulphate solution.

Discussion

391.	Match the compounds/ions in Column I with their properties/reactions in Column IIColumnIColumnII1. Benzaldehydep. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyneq. gives precipitate with AgNO33. CN−r. is a nucleophile4. I−s. is involved in cyanohydrin formation
Answer» Match the compounds/ions in Column I with their properties/reactions in Column II $\begin{matrix} C o l u m n I & C o l u m n I I 1. Benzaldehyde & p. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyne & q. gives precipitate with A g N O_{3} 3. C N^{-} & r. is a nucleophile 4. I^{-} & s. is involved in cyanohydrin formation \end{matrix}$

391.

Match the compounds/ions in Column I with their properties/reactions in Column IIColumnIColumnII1. Benzaldehydep. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyneq. gives precipitate with AgNO33. CN−r. is a nucleophile4. I−s. is involved in cyanohydrin formation

Answer»

Match the compounds/ions in Column I with their properties/reactions in Column II

$\begin{matrix} C o l u m n I & C o l u m n I I 1. Benzaldehyde & p. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyne & q. gives precipitate with A g N O_{3} 3. C N^{-} & r. is a nucleophile 4. I^{-} & s. is involved in cyanohydrin formation \end{matrix}$

Discussion

392.	5 moles of an ideal gas expand reversibly from a volume of 8 dm3 to 80 dm3 at a temperature of 27∘C. Calculate the change in entropy.
Answer» 5 moles of an ideal gas expand reversibly from a volume of 8 $d m^{3}$ to 80 $d m^{3}$ at a temperature of $27^{\circ} C$ . Calculate the change in entropy.

Discussion

393.	Which one has the highest osmotic pressure?
Answer» Which one has the highest osmotic pressure?

Discussion

394.	Find the strongest acid among the following compounds.
Answer» Find the strongest acid among the following compounds.

Discussion

395.	The above hydration can be carried out by
Answer» The above hydration can be carried out by

Discussion

396.	Cl2 + 2NaOH → NaCl + A–– + H2O to form. A is (Cold & dilute)
Answer» $C l_{2} + 2 N a O H \to N a C l + A - - + H_{2} O$ to form. A is (Cold & dilute)

396.

Cl2 + 2NaOH → NaCl + A–– + H2O to form. A is (Cold & dilute)

Answer»

$C l_{2} + 2 N a O H \to N a C l + A - - + H_{2} O$ to form. A is

(Cold & dilute)

Discussion

397.	The rate of a reaction doubles when its temperature changes form 300 K to 310 K. Activation energy of such a reaction will be (R=8.314 JK−1 mol−1 and log 2=0.301)
Answer» The rate of a reaction doubles when its temperature changes form 300 K to 310 K. Activation energy of such a reaction will be $(R = 8.314 J K^{- 1} m o l^{- 1} a n d l o g 2 = 0.301)$

Discussion

398.	Match the following functional group test for glucose
Answer» Match the following functional group test for glucose

Discussion

399.	For the given isotherm for one mole of an ideal gas, which follows Boyle's law, what will be the value of temperature.
Answer» For the given isotherm for one mole of an ideal gas, which follows Boyle's law, what will be the value of temperature.

Discussion

400.	Which is not easily precipitated from aqueous solution ?
Answer» Which is not easily precipitated from aqueous solution ?

Discussion

Explore topic-wise InterviewSolutions in .

Bakelite is formed by polymerisation between

The number of radial nodes and angular nodes for d-orbital can be represented as:

For a reaction:3A→ productsIt is found that the rate of reaction doubles when the concentration of A is increased by four times. What is the order of the reaction?

What is mole fraction represented by?

The energy of an electron in the second and the third Bohr's orbits of the hydrogen atom is −5.42×10−12 erg and −2.41×10−12 erg respectively. Calculate the wavelength of the emitted radiation when the electron drops from the third orbit to the second orbit.

Which of the following statements about the composition of the vapour over an ideal 1: 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at 25∘C. (Given,vapour pressure data at 25∘C. benzene = 12.8 kPa, toluene = 3.85 kPa )

Arrange the following compounds in the increasing order of polarity.

Li and a proton are accelerated by the same potential then their de Broglie wavelengths λLi and λp have the ratio (assume mLi=9mp)

Which ester given below can most easily be produced by acid catalysed esterification (Fischer's esterification)?

Which of the following will not produce hydrogen gas?

Which one of the following is not a hydrocarbon?

Orlon is a polymer is

The relationship between molality (m) and mole fraction (χA) of the solvent is:

Which of the following represents the least number of molecules?

Element ‘B’ forms ccp structure and ‘A’ occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral voids. The structure of bimetallic oxide is:

A 0.001 molal solution of [Pt(NH3)4cl4] in water had a freezing point depression of 0.0054∘. If Kf for water is 1.80, the correct formulation for the above molecule is

H3C−CH2−C|CH3=CH2+HBr→AA (predominantly) is

To maintain the pH of 7.4 for blood at normal condition which is 2 M in H2CO3 (at equilibrium), what volume of 7.8 M NaHCO3 solution is required to mix with 10 mL of blood?Given: K(H2CO3)=7.8×10−7; 107.4=2.511×107

The drain cleaner, Drainex contains small bits of aluminum which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20∘C and one bar will be released when 0.15 g aluminum is allowed to react?

The basis of C-14 dating method is that the:

Dehydrohalogenation of an alkyl halide is a/an?

On heating 0.199 g of a metallic oxide in a stream of hydrogen, 0.045 g of water is formed. Find the equivalent weight of the metal.

Which of the following is homocyclic?

The number of bond pairs and lone pairs in H2O are _____ &amp; _____ respectively.

In the reversible reaction A + B ⇌​ C + D, the concentration of each C and D at equilibrium was 0.8 mole/litre, then the equilibrium constant KC will be

The number of radial nodes in 5d orbital is:

Which of the following reaction will give an alkyne?

Sodium nitrate decomposes above −800oC to give (IIT-JEE, 1998)

Which of the following set has the strongest tendency to form anions

When treated with ammoniacal cuprous chloride, which one among the following forms copper derivative

At room temperature and under normal conditions, oxygen is a ___ while the other chalcogens are ___.

What is the appropriate order of processes for the extraction of lead from Galena?A) Froth flotation B) Calcination C) Roasting D) Self Reduction E) Electrolytic Reduction F) Smelting

At low pressures (For 1 mole), the van der Waals equation is written as [p+aV2]V=RT The compressibility factor is then equal to:

Which of the following compounds can readily give precipitate with AgClO4?

An alkene 'X' of the formula C4H8 on ozonolysis produced acetone and formaldehyde. The product obtained when 'X' reacts with HBr is

The electrons identified by quantum numbers n and l:(P) n = 5, l = 1 (Q) n = 3, l = 0(R) n = 4, l = 2 (S) n = 2, l = 1can be placed in decreasing order of energy as :

The rise in the boiling point of a solution containing 1.8 gram of glucose in 100g of a solvent in 0.10C. The molal elevation constant of the liquid is

Calculate the percentage of available chlorine in a sample of 3.546 g of bleaching powder which was dissolved in 100 mL of water, 25 mL of this solution, when treated with acetic acid and excess KI , required 20 mL of 0.125 N sodium thiosulphate solution.

Match the compounds/ions in Column I with their properties/reactions in Column IIColumnIColumnII1. Benzaldehydep. gives precipitate with 2,4-dinitrophenylhydrazine 2. Propyneq. gives precipitate with AgNO33. CN−r. is a nucleophile4. I−s. is involved in cyanohydrin formation

5 moles of an ideal gas expand reversibly from a volume of 8 dm3 to 80 dm3 at a temperature of 27∘C. Calculate the change in entropy.

Which one has the highest osmotic pressure?

Find the strongest acid among the following compounds.

The above hydration can be carried out by

Cl2 + 2NaOH → NaCl + A–– + H2O to form. A is (Cold &amp; dilute)

The rate of a reaction doubles when its temperature changes form 300 K to 310 K. Activation energy of such a reaction will be (R=8.314 JK−1 mol−1 and log 2=0.301)

Match the following functional group test for glucose

For the given isotherm for one mole of an ideal gas, which follows Boyle's law, what will be the value of temperature.

Which is not easily precipitated from aqueous solution ?

The number of bond pairs and lone pairs in H2O are _ & _ respectively.

In the reversible reaction A + B ⇌ C + D, the concentration of each C and D at equilibrium was 0.8 mole/litre, then the equilibrium constant KC will be

At room temperature and under normal conditions, oxygen is a _ while the other chalcogens are _.

Cl2 + 2NaOH → NaCl + A–– + H2O to form. A is (Cold & dilute)