1708 + Interview Questions in Chemistry Page 11 InterviewSolution

501.	Nylon is:
Answer» Nylon is:

Discussion

502.	The number of compounds which undergo tautomerism to form an aromatic product are :
Answer» The number of compounds which undergo tautomerism to form an aromatic product are :

Discussion

503.	When copper pyrite is roasted in excess of air, a mixture of Cu2S and FeO are formed. FeO is present as impurity. This can be removed as slag during Smelting. The flux added to form slag is
Answer» When copper pyrite is roasted in excess of air, a mixture of $C u_{2} S$ and $F e O$ are formed. FeO is present as impurity. This can be removed as slag during Smelting. The flux added to form slag is

Discussion

504.	The total number of atoms of all elements present in 1 mole of ammonium dichromate is
Answer» The total number of atoms of all elements present in 1 mole of ammonium dichromate is

Discussion

505.	In electrolytic refining of Cu, when 9.65 A of current is passed through an electrolytic cell for 30000 seconds to purify 100 g of an impure Cu metal at the cathode. What is % of impurity in the metal? (Atomic mass of Cu = 63.5 amu)
Answer» In electrolytic refining of Cu, when 9.65 A of current is passed through an electrolytic cell for 30000 seconds to purify 100 g of an impure Cu metal at the cathode. What is % of impurity in the metal? (Atomic mass of Cu = 63.5 amu)

Discussion

506.	One Faraday is:
Answer» One Faraday is:

Discussion

507.	The general formula of silicones is
Answer» The general formula of silicones is

Discussion

508.	suggests that a process is spontaneous
Answer» suggests that a process is spontaneous

Discussion

509.	The quantum number of four electrons are given below: I. n=4,l=2,ml=−2,ms=−1/2II. n=3,l=2,ml=1,ms=+1/2III. n=4,l=1,ml=0,ms=+1/2IV. n=3,l=1,ml=1,ms=−1/2The correct order of their increasing energies will be:
Answer» The quantum number of four electrons are given below: I. $n = 4, l = 2, m_{l} = - 2, m_{s} = - 1 / 2$ II. $n = 3, l = 2, m_{l} = 1, m_{s} = + 1 / 2$ III. $n = 4, l = 1, m_{l} = 0, m_{s} = + 1 / 2$ IV. $n = 3, l = 1, m_{l} = 1, m_{s} = - 1 / 2$ The correct order of their increasing energies will be:

Discussion

510.	The number of isomers for the compound with molecular formula C2BrClFI is:
Answer» The number of isomers for the compound with molecular formula $C_{2} B r C l F I$ is:

Discussion

511.	Which of the following isomerism is shown by alkanes?
Answer» Which of the following isomerism is shown by alkanes?

Discussion

512.	In the redox reactionxMnO +yPbO2+zHNO3⟶HMnO4 +Pb(NO3)2 +H2O
Answer» In the redox reaction xMnO +y $P b O_{2}$ +z $H N O_{3}$ $⟶$ $H M n O_{4}$ + $P b (N O_{3})_{2}$ + $H_{2} O$

512.

In the redox reactionxMnO +yPbO2+zHNO3⟶HMnO4 +Pb(NO3)2 +H2O

Answer»

In the redox reaction

xMnO +y $P b O_{2}$ +z $H N O_{3}$ $⟶$ $H M n O_{4}$ + $P b (N O_{3})_{2}$ + $H_{2} O$

Discussion

513.	What is the correct order of electronegativity?
Answer» What is the correct order of electronegativity?

Discussion

514.	Consider the chemical reactionN2(g)+3H2(g)⟶2NH3(g)The rate of this reaction can be expressed in terms of time derivatives of the concentration of N2(g),H2(g),or NH3(g). Identify the correct relationship among the rate expressions.
Answer» Consider the chemical reaction $N_{2} (g) + 3 H_{2} (g) ⟶ 2 N H_{3} (g)$ The rate of this reaction can be expressed in terms of time derivatives of the concentration of $N_{2} (g), H_{2} (g), o r N H_{3} (g) .$ Identify the correct relationship among the rate expressions.

514.

Consider the chemical reactionN2(g)+3H2(g)⟶2NH3(g)The rate of this reaction can be expressed in terms of time derivatives of the concentration of N2(g),H2(g),or NH3(g). Identify the correct relationship among the rate expressions.

Answer»

Consider the chemical reaction

$N_{2} (g) + 3 H_{2} (g) ⟶ 2 N H_{3} (g)$

The rate of this reaction can be expressed in terms of time derivatives of the concentration of $N_{2} (g), H_{2} (g), o r N H_{3} (g) .$ Identify the correct relationship among the rate expressions.

Discussion

515.	Arrange the following compounds in the order of decreasing molar conductivity in aqueous solution.a. K[Co(NH3)2(NO2)4]b. [Cr(NH3)3(NO2)3]c. [Cr(NH3)5(NO2)]3[Co(NO2)6]2d. Mg[Cr(NH3)(NO2)5]
Answer» Arrange the following compounds in the order of decreasing molar conductivity in aqueous solution. a. K[Co $(N H_{3})_{2} (N O_{2})_{4}$ ] b. [Cr $(N H_{3})_{3} (N O_{2})_{3}$ ] c. $[C r (N H_{3})_{5} (N O_{2})]_{3} [C o (N O_{2})_{6}]_{2}$ d. Mg[Cr $(N H_{3}) (N O_{2})_{5}$ ]

Discussion

516.	Regarding the rate of a reversible reaction, the correct explanation of the effect of catalyst is
Answer» Regarding the rate of a reversible reaction, the correct explanation of the effect of catalyst is

516.

Regarding the rate of a reversible reaction, the correct explanation of the effect of catalyst is

Answer»

Regarding the rate of a reversible reaction, the correct explanation of the effect

of catalyst is

Discussion

517.	In the reaction with HCl, an alkene reacts in accordance with the Markovnikov's rule, to give a product 1-chloro-1-methylcyclohexane. The possible alkene is:
Answer» In the reaction with $H C l$ , an alkene reacts in accordance with the Markovnikov's rule, to give a product 1-chloro-1-methylcyclohexane. The possible alkene is:

Discussion

518.	The half-life of 6C14 if its K or \lambda is 2.31×10−4 is
Answer» The half-life of $_{6} C^{14}$ if its K or \lambda is $2.31 \times 10^{- 4}$ is

Discussion

519.	A chiral C5H10O ether reacts with hot HI to give a C5H10I2 product. Treatment of this with hot KOH in ethanol produces 1, 3-pentadiene. What is the structure of the original ether?
Answer» A chiral $C_{5} H_{10} O$ ether reacts with hot $H I$ to give a $C_{5} H_{10} I_{2}$ product. Treatment of this with hot $K O H$ in ethanol produces 1, 3-pentadiene. What is the structure of the original ether?

Discussion

520.	Calculate the amount of (NH4)2SO4 (in gram) which must be added to 1 L solution of 0.2 M NH4OH to yield a solution of pH=9.35 at 25oC.(Assume volume is not changing during the reaction)Kb for NH4OH is 1.8×10−5 Take log 1.8=0.25 and 100.1=1.25
Answer» Calculate the amount of $(N H_{4})_{2} S O_{4}$ (in gram) which must be added to $1 L$ solution of $0.2 M$ $N H_{4} O H$ to yield a solution of $p H = 9.35$ at $25^{o} C$ . (Assume volume is not changing during the reaction) $K_{b}$ for $N H_{4} O H$ is $1.8 \times 10^{- 5}$ Take $log 1.8 = 0.25 a n d 10^{0.1} = 1.25$

Discussion

521.	A steel bottle contains 20 L of gas at 10 atm and 27 ∘C. What is its volume at STP?
Answer» A steel bottle contains $20 L$ of gas at $10 atm$ and $27^{\circ} C$ . What is its volume at STP?

Discussion

522.	Which of the following represents correct order of increasing electron gain enthalpy with negative sign for the elements 0, S, F and Cl? [CBSE AIPMT 2010]
Answer» Which of the following represents correct order of increasing electron gain enthalpy with negative sign for the elements 0, S, F and Cl? [CBSE AIPMT 2010]

Discussion

523.	Diethylether does not react with
Answer» Diethylether does not react with

Discussion

524.	In the following question two Statement-I (Assertion) and Statement-2 (Reason) are provided. each question has 4 choices (a), (b), (c) and (d) for its answer, out of which Only One is correct. Mark your responses from the following options:Statement-1: Aniline becomes more reactive towards electrophilic aromatic substitution in presence of strongly acidic solution.Statement-2: The amino group is completely protonated in strongly acidic medium. Thus the lone pair of electrons on the nitrogen is no longer available for resonance.
Answer» In the following question two Statement-I (Assertion) and Statement-2 (Reason) are provided. each question has 4 choices (a), (b), (c) and (d) for its answer, out of which Only One is correct. Mark your responses from the following options: Statement-1: Aniline becomes more reactive towards electrophilic aromatic substitution in presence of strongly acidic solution. Statement-2: The amino group is completely protonated in strongly acidic medium. Thus the lone pair of electrons on the nitrogen is no longer available for resonance.

Discussion

525.	The increase in internal energy of 1 kg of water at 1000C when it is converted into steam at the same temperture and at 1 atm (100 kPa) will be:(The density of water and steam are 1000kg/m3 and 0.6kg/m3 respectively. The latent heat of vapourisation of water is 2.25 106 J/kg.)
Answer» The increase in internal energy of 1 kg of water at $100^{0} C$ when it is converted into steam at the same temperture and at 1 atm (100 kPa) will be: (The density of water and steam are $1000 k g / m^{3}$ and $0.6 k g / m^{3}$ respectively. The latent heat of vapourisation of water is 2.25 $10^{6}$ J/kg.)

Discussion

526.	The quantity k in a rate law expression
Answer» The quantity k in a rate law expression

Discussion

527.	Which of the following is not obtained in the extraction of Iron?
Answer» Which of the following is not obtained in the extraction of Iron?

Discussion

528.	Identify incorrectly matched set
Answer» Identify incorrectly matched set

Discussion

529.	Which of the following is true for the electrochemical Daniel cell?
Answer» Which of the following is true for the electrochemical Daniel cell?

Discussion

530.	Photons of minimum energy 496 kJ/mol are needed to ionize sodium atoms. Calculate the lowest frequecy of light that will ionize a sodium atom.
Answer» Photons of minimum energy 496 kJ/mol are needed to ionize sodium atoms. Calculate the lowest frequecy of light that will ionize a sodium atom.

Discussion

531.	Formation of ethylene from acetylene is an example of :
Answer» Formation of ethylene from acetylene is an example of :

Discussion

532.	The above reaction is called :
Answer» The above reaction is called :

Discussion

533.	The amount of energy released when a million atoms of iodine are completely converted into I– ions in the vapour state according to the equation, I(g)+e–→I–(g) is 5.0×10–13 J.Calculate the electron gain enthalpy of iodine in terms of kJ mol–1.
Answer» The amount of energy released when a million atoms of iodine are completely converted into $I^{-}$ ions in the vapour state according to the equation, $I (g) + e^{-} \to I^{-} (g)$ is $5.0 \times 10^{- 13}$ J. Calculate the electron gain enthalpy of iodine in terms of $k J m o l^{- 1}$ .

Discussion

534.	Solubility of alkaline earth metal sulphates in water decreases in the sequence:
Answer» Solubility of alkaline earth metal sulphates in water decreases in the sequence:

Discussion

535.	The dipole moments of CCl4,CHCl3 and CH4 are in the order:
Answer» The dipole moments of $C C l_{4}, C H C l_{3}$ and $C H_{4}$ are in the order:

Discussion

536.	In infinite dilutions, the molar conductances of Ba2+ and Cl- are 127 and 76 . The equivalent conductivity of at infinite dilution is [CBSE 2000]
Answer» In infinite dilutions, the molar conductances of Ba²⁺ and Cl^- are 127 and 76 . The equivalent conductivity of at infinite dilution is [CBSE 2000]

536.

In infinite dilutions, the molar conductances of Ba2+ and Cl- are 127 and 76 . The equivalent conductivity of at infinite dilution is [CBSE 2000]

Answer»

In infinite dilutions, the molar conductances of Ba²⁺ and Cl^- are 127 and

76 . The equivalent conductivity of at infinite

dilution is

[CBSE 2000]

Discussion

537.	Which one of the following is an example of a positive ion and negative ion that is isoelectronic with F−?
Answer» Which one of the following is an example of a positive ion and negative ion that is isoelectronic with $F^{-}$ ?

Discussion

538.	Acetone and propanal can be distinguished by:
Answer» Acetone and propanal can be distinguished by:

Discussion

539.	If 2 millimoles of hydrated copper sulphate salt (CuSO4.5H2O) is heated to dryness, then calculate the obtained mass of anhydrous copper sulphate salt.(Given: molar mass of Cu=63.5 g/mol)
Answer» If $2$ millimoles of hydrated copper sulphate salt $(C u S O_{4} .5 H_{2} O)$ is heated to dryness, then calculate the obtained mass of anhydrous copper sulphate salt. (Given: molar mass of $C u = 63.5 g/mol$ )

Discussion

540.	Considering the elements B,Al,Mg and K, the correct order of their metallic character is:
Answer» Considering the elements $B, A l, M g$ and $K$ , the correct order of their metallic character is:

Discussion

541.	Statement - I: Cl− and Ca2+ are isoelectronic species.Statement - II: Isoelectronic species should have same charges.
Answer» Statement - I: $C l^{-} a n d C a^{2 +}$ are isoelectronic species. Statement - II: Isoelectronic species should have same charges.

Discussion

542.	For the hypothetical reaction A2(g) + B2(g) ⇌ 2AB(g) ΔrG∘ and ΔrS∘ are 20 kJ/mol and −20JK−1 mol−1 respectively at 200K. If ΔrCp is 20 JK−1 mol−1 then ΔrH∘ at 400K is
Answer» For the hypothetical reaction $A_{2} (g) + B_{2} (g) ⇌ 2 A B (g) Δ_{r} G^{\circ}$ and $Δ_{r} S^{\circ}$ are $20 k J / m o l$ and $- 20 J K^{- 1} m o l^{- 1}$ respectively at $200 K$ . If $Δ_{r} C^{p}$ is $20 J K^{- 1} m o l^{- 1}$ then $Δ_{r} H^{\circ}$ at $400 K$ is

Discussion

543.	Ethylene reacts with ozone gas to form the compound
Answer» Ethylene reacts with ozone gas to form the compound

Discussion

544.	Anhydrous sodium acetate on heating with sodalime gives
Answer» Anhydrous sodium acetate on heating with sodalime gives

Discussion

545.	The element with atomic number = 35 is:
Answer» The element with atomic number = 35 is:

Discussion

546.	Atoms of element B from HCP lattice and those of element A occupy two thirds of tetrahedral voids. What is the formula of the compound formed by elements A and B.
Answer» Atoms of element B from HCP lattice and those of element A occupy two thirds of tetrahedral voids. What is the formula of the compound formed by elements A and B.

Discussion

547.	A direct current deposits 54 g of silver during electrolysis. How much amount of aluminium would be deposited from aluminium chloride solution by the same amount of electricity?( Atomic mass of Ag =108 g/mol)(Atomic mass of Al=27 g/mol)
Answer» A direct current deposits $54 g$ of silver during electrolysis. How much amount of aluminium would be deposited from aluminium chloride solution by the same amount of electricity? ( $Atomic mass of Ag = 108 g / m o l$ ) ( $Atomic mass of Al = 27 g / m o l$ )

Discussion

548.	Which of the following statement is not correct for the element having electronic configuration 1s22s22p63s1?
Answer» Which of the following statement is not correct for the element having electronic configuration $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$ ?

Discussion

549.	Which will undergo SN2 reaction fastest among the following?
Answer» Which will undergo SN2 reaction fastest among the following?

Discussion

550.	In a cubic packed structure of a compound, the lattice is made up of oxide ions, one-fifth of the tetrahedral voids are occupied by X ions while half of the octahedral voids are occupied by Y ions. Then the formula of the oxide will be
Answer» In a cubic packed structure of a compound, the lattice is made up of oxide ions, one-fifth of the tetrahedral voids are occupied by X ions while half of the octahedral voids are occupied by Y ions. Then the formula of the oxide will be

Discussion

Explore topic-wise InterviewSolutions in .

Nylon is:

The number of compounds which undergo tautomerism to form an aromatic product are :

When copper pyrite is roasted in excess of air, a mixture of Cu2S and FeO are formed. FeO is present as impurity. This can be removed as slag during Smelting. The flux added to form slag is

The total number of atoms of all elements present in 1 mole of ammonium dichromate is

In electrolytic refining of Cu, when 9.65 A of current is passed through an electrolytic cell for 30000 seconds to purify 100 g of an impure Cu metal at the cathode. What is % of impurity in the metal? (Atomic mass of Cu = 63.5 amu)

One Faraday is:

The general formula of silicones is

suggests that a process is spontaneous

The quantum number of four electrons are given below: I. n=4,l=2,ml=−2,ms=−1/2II. n=3,l=2,ml=1,ms=+1/2III. n=4,l=1,ml=0,ms=+1/2IV. n=3,l=1,ml=1,ms=−1/2The correct order of their increasing energies will be:

The number of isomers for the compound with molecular formula C2BrClFI is:

Which of the following isomerism is shown by alkanes?

In the redox reactionxMnO +yPbO2+zHNO3⟶HMnO4 +Pb(NO3)2 +H2O

What is the correct order of electronegativity?

Consider the chemical reactionN2(g)+3H2(g)⟶2NH3(g)The rate of this reaction can be expressed in terms of time derivatives of the concentration of N2(g),H2(g),or NH3(g). Identify the correct relationship among the rate expressions.

Arrange the following compounds in the order of decreasing molar conductivity in aqueous solution.a. K[Co(NH3)2(NO2)4]b. [Cr(NH3)3(NO2)3]c. [Cr(NH3)5(NO2)]3[Co(NO2)6]2d. Mg[Cr(NH3)(NO2)5]

Regarding the rate of a reversible reaction, the correct explanation of the effect of catalyst is

In the reaction with HCl, an alkene reacts in accordance with the Markovnikov's rule, to give a product 1-chloro-1-methylcyclohexane. The possible alkene is:

The half-life of 6C14 if its K or \lambda is 2.31×10−4 is

A chiral C5H10O ether reacts with hot HI to give a C5H10I2 product. Treatment of this with hot KOH in ethanol produces 1, 3-pentadiene. What is the structure of the original ether?

Calculate the amount of (NH4)2SO4 (in gram) which must be added to 1 L solution of 0.2 M NH4OH to yield a solution of pH=9.35 at 25oC.(Assume volume is not changing during the reaction)Kb for NH4OH is 1.8×10−5 Take log 1.8=0.25 and 100.1=1.25

A steel bottle contains 20 L of gas at 10 atm and 27 ∘C. What is its volume at STP?

Which of the following represents correct order of increasing electron gain enthalpy with negative sign for the elements 0, S, F and Cl? [CBSE AIPMT 2010]

Diethylether does not react with

The increase in internal energy of 1 kg of water at 1000C when it is converted into steam at the same temperture and at 1 atm (100 kPa) will be:(The density of water and steam are 1000kg/m3 and 0.6kg/m3 respectively. The latent heat of vapourisation of water is 2.25 106 J/kg.)

The quantity k in a rate law expression

Which of the following is not obtained in the extraction of Iron?

Identify incorrectly matched set

Which of the following is true for the electrochemical Daniel cell?

Photons of minimum energy 496 kJ/mol are needed to ionize sodium atoms. Calculate the lowest frequecy of light that will ionize a sodium atom.

Formation of ethylene from acetylene is an example of :

The above reaction is called :

The amount of energy released when a million atoms of iodine are completely converted into I– ions in the vapour state according to the equation, I(g)+e–→I–(g) is 5.0×10–13 J.Calculate the electron gain enthalpy of iodine in terms of kJ mol–1.

Solubility of alkaline earth metal sulphates in water decreases in the sequence:

The dipole moments of CCl4,CHCl3 and CH4 are in the order:

In infinite dilutions, the molar conductances of Ba2+ and Cl- are 127 and 76 . The equivalent conductivity of at infinite dilution is [CBSE 2000]

Which one of the following is an example of a positive ion and negative ion that is isoelectronic with F−?

Acetone and propanal can be distinguished by:

If 2 millimoles of hydrated copper sulphate salt (CuSO4.5H2O) is heated to dryness, then calculate the obtained mass of anhydrous copper sulphate salt.(Given: molar mass of Cu=63.5 g/mol)

Considering the elements B,Al,Mg and K, the correct order of their metallic character is:

Statement - I: Cl− and Ca2+ are isoelectronic species.Statement - II: Isoelectronic species should have same charges.

For the hypothetical reaction A2(g) + B2(g) ⇌ 2AB(g) ΔrG∘ and ΔrS∘ are 20 kJ/mol and −20JK−1 mol−1 respectively at 200K. If ΔrCp is 20 JK−1 mol−1 then ΔrH∘ at 400K is

Ethylene reacts with ozone gas to form the compound

Anhydrous sodium acetate on heating with sodalime gives

The element with atomic number = 35 is:

Atoms of element B from HCP lattice and those of element A occupy two thirds of tetrahedral voids. What is the formula of the compound formed by elements A and B.

A direct current deposits 54 g of silver during electrolysis. How much amount of aluminium would be deposited from aluminium chloride solution by the same amount of electricity?( Atomic mass of Ag =108 g/mol)(Atomic mass of Al=27 g/mol)

Which of the following statement is not correct for the element having electronic configuration 1s22s22p63s1?

Which will undergo SN2 reaction fastest among the following?

In a cubic packed structure of a compound, the lattice is made up of oxide ions, one-fifth of the tetrahedral voids are occupied by X ions while half of the octahedral voids are occupied by Y ions. Then the formula of the oxide will be