2600 + Interview Questions in Chemistry Page 19 InterviewSolution

901.	Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 50% of the consumed energy is converted into light. Wavelength of sodium light = 600 nm. Take h=6.6×10−34 Js and c=3×108ms−1
Answer» Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 50% of the consumed energy is converted into light. Wavelength of sodium light = 600 nm. Take $h = 6.6 \times 10^{- 34} J s a n d c = 3 \times 10^{8} m s^{- 1}$

Discussion

902.	Chlorobenzene on heating with NH3under pressure in the presence of cuprous oxide gives
Answer» Chlorobenzene on heating with NH₃under pressure in the presence of cuprous oxide gives

Discussion

903.	Assertion (A): Both aromatic and aliphatic primary amines produce stable diazonium salts on diazotizationReason (R): Aromatic diazonium salt exhibit resonance
Answer» Assertion (A): Both aromatic and aliphatic primary amines produce stable diazonium salts on diazotization Reason (R): Aromatic diazonium salt exhibit resonance

903.

Assertion (A): Both aromatic and aliphatic primary amines produce stable diazonium salts on diazotizationReason (R): Aromatic diazonium salt exhibit resonance

Answer»

Assertion (A): Both aromatic and aliphatic primary amines produce stable diazonium salts on diazotization

Reason (R): Aromatic diazonium salt exhibit resonance

Discussion

904.	Select the rate law that conforms to the following data for the reaction : A+B→ProductsExp No.[A](mol L−1)[B](mol L−1)Initial rate(mol L−1S−1)10.00120.00351×10−420.0240.0708×10−330.0240.0351×10−340.0120.0708×10−3
Answer» Select the rate law that conforms to the following data for the reaction : $A + B \to P r o d u c t s$ $\begin{matrix} E x p N o . & [A] (m o l L^{- 1}) & [B] (m o l L^{- 1}) & I n i t i a l r a t e (m o l L^{- 1} S^{- 1}) 1 & 0.0012 & 0.0035 & 1 \times 10^{- 4} 2 & 0.024 & 0.070 & 8 \times 10^{- 3} 3 & 0.024 & 0.035 & 1 \times 10^{- 3} 4 & 0.012 & 0.070 & 8 \times 10^{- 3} \end{matrix}$

Discussion

905.	CH3COOEt CH3MgBr−−−−−−→ExcessP
Answer» $C H_{3} C O O E t$ $C H_{3} M g B r - ----- \to E x c e s s P$

Discussion

906.	All bonds in benzene are equal due to?
Answer» All bonds in benzene are equal due to?

906.

All bonds in benzene are equal due to?

Answer»

All bonds in benzene are equal due to?

Discussion

907.	What is the oxidation state of Manganese in Manganese (VII) oxide?
Answer» What is the oxidation state of Manganese in Manganese (VII) oxide?

Discussion

908.	More than One Answer Typeएक से अधिक उत्तर प्रकार के प्रश्नWhich of the following reactions(s) is/are giving correct products?निम्नलिखित में से कौनसी अभिक्रिया/अभिक्रियाएं सही उत्पाद देती है/हैं?
Answer» More than One Answer Type एक से अधिक उत्तर प्रकार के प्रश्न Which of the following reactions(s) is/are giving correct products? निम्नलिखित में से कौनसी अभिक्रिया/अभिक्रियाएं सही उत्पाद देती है/हैं?

Discussion

909.	1, 2, 3-trihydroxybenzene is also known as
Answer» 1, 2, 3-trihydroxybenzene is also known as

Discussion

910.	Find the solubility of a sparingly soluble salt, BaSO4 in 0.02 M Na2SO4 solution ?(Ksp for BaSO4=1.1×10−10)
Answer» Find the solubility of a sparingly soluble salt, $B a S O_{4}$ in $0.02 M$ $N a_{2} S O_{4}$ solution ? $(K_{s p}$ for $B a S O_{4} = 1.1 \times 10^{- 10})$

Discussion

911.	Pick up the final product in the following reaction. Product is
Answer» Pick up the final product in the following reaction. Product is

911.

Pick up the final product in the following reaction. Product is

Answer»

Pick up the final product in the following reaction.

Product is

Discussion

912.	Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction ?
Answer» Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction ?

Discussion

913.	Find the pair of species having the same shape but different hybridizations of the central atom.
Answer» Find the pair of species having the same shape but different hybridizations of the central atom.

Discussion

914.	Which of the following species is not isoelectronic with the others?
Answer» Which of the following species is not isoelectronic with the others?

Discussion

915.	The boiling point of a solution containing 0.61 g of benzoic acid in 50 g of carbon disulphide assuming 84% dimerization of the acid, where boiling point and Kb of CS2 being 46.2∘C and 2.3 K kg mol−1 is :
Answer» The boiling point of a solution containing 0.61 g of benzoic acid in 50 g of carbon disulphide assuming $84 %$ dimerization of the acid, where boiling point and Kb of $C S_{2}$ being ${46.2}^{\circ} C$ and $2.3 K k g m o l^{- 1}$ is :

Discussion

916.	Number of moles of K2Cr2O7 reduced by one mole of Sn2+ ions (in acidic medium) is:
Answer» Number of moles of $K_{2} C r_{2} O_{7}$ reduced by one mole of $S n^{2 +}$ ions (in acidic medium) is:

Discussion

917.	Which of the following will show a positive haloform test?
Answer» Which of the following will show a positive haloform test?

Discussion

918.	Convert the following condensed structure into Bond-line structure(CH3)2CHCH2CH3
Answer» Convert the following condensed structure into Bond-line structure $(C H_{3})_{2} C H C H_{2} C H_{3}$

Discussion

919.	The pair of electrons in the given carbanion, CH3C≡C−, is present in which orbital?
Answer» The pair of electrons in the given carbanion, $C H_{3} C \equiv C^{-}$ , is present in which orbital?

Discussion

920.	Which of the following shows electrical conduction [CBSE PMT 1999; AIIMS 1999]
Answer» Which of the following shows electrical conduction [CBSE PMT 1999; AIIMS 1999]

920.

Which of the following shows electrical conduction [CBSE PMT 1999; AIIMS 1999]

Answer»

Which of the following shows electrical conduction

[CBSE PMT 1999; AIIMS 1999]

Discussion

921.	Consider the following list of reagents, acidified K2Cr2O7, alkaline KMnO4,CuSO4,H2O2,Cl2,O3,FeCl3,HNO3 and Na2S2O3. The total number of reagents that can oxidise aqueous iodide to iodine is:___
Answer» Consider the following list of reagents, acidified $K_{2} C r_{2} O_{7}$ , alkaline $K M n O_{4}, C u S O_{4}, H_{2} O_{2}, C l_{2}, O_{3}, F e C l_{3}, H N O_{3}$ and $N a_{2} S_{2} O_{3}$ . The total number of reagents that can oxidise aqueous iodide to iodine is:___

Discussion

922.	Using MOT, predict which of the following species has the shortest bond length ?
Answer» Using MOT, predict which of the following species has the shortest bond length ?

Discussion

923.	The mass of a molecule of water is
Answer» The mass of a molecule of water is

Discussion

924.	Which of the following statements is correct according to the Law of mass action?
Answer» Which of the following statements is correct according to the Law of mass action?

Discussion

925.	In glycyl alanine the number of sp3and sp2 hybridised carbons respectively
Answer» In glycyl alanine the number of sp³ and sp² hybridised carbons respectively

Discussion

926.	The molar mass of a certain gas B is double than that of A. Also the RMS velocity of gas A is 200 ms−1 at a certain temperature. RMS velocity of gas B at the temperature half of the temperature of A is:
Answer» The molar mass of a certain gas $B$ is double than that of $A$ . Also the RMS velocity of gas $A$ is $200 {ms}^{- 1}$ at a certain temperature. RMS velocity of gas $B$ at the temperature half of the temperature of $A$ is:

Discussion

927.	Compare the carbon-carbon bond rotation across the compounds A, B and C:
Answer» Compare the carbon-carbon bond rotation across the compounds A, B and C:

Discussion

928.	The total number of atoms in a body centred cubic unit cell is
Answer» The total number of atoms in a body centred cubic unit cell is

Discussion

929.	When the electrons of a sample of hydrogen atoms jump from the 4th orbit to the ground state, the maximum number of spectral lines observed is:
Answer» When the electrons of a sample of hydrogen atoms jump from the $4^{t h}$ orbit to the ground state, the maximum number of spectral lines observed is:

Discussion

930.	Consider an ionic solid MX with NaCl structure. Construct a new structure (Z) whose unit cell is constructed from the unit cell of MX following the sequential instructions given below. Neglect the charge balance.(i) Remove all the anions (X) except the central one(ii) Replace all the face centered cations (M) by anions (x)(iii) Remove all the corner cations (M)(iv) Replace the central anion (X) with cation (M)The value of (number of anionsnumber of cations) in Z is.
Answer» Consider an ionic solid MX with $N a C l$ structure. Construct a new structure (Z) whose unit cell is constructed from the unit cell of MX following the sequential instructions given below. Neglect the charge balance. (i) Remove all the anions (X) except the central one (ii) Replace all the face centered cations (M) by anions (x) (iii) Remove all the corner cations (M) (iv) Replace the central anion (X) with cation (M) The value of $(\frac{number of anions}{number of cations})$ in Z is.

Discussion

931.	Correct order of bond length is-
Answer» Correct order of bond length is-

Discussion

932.	Zn is related to which group
Answer» Zn is related to which group

Discussion

933.	Which of the following resonating structures of 1-methoxy-1,3-butadiene is least stable?
Answer» Which of the following resonating structures of 1-methoxy-1,3-butadiene is least stable?

Discussion

934.	What is the correct product of the following reaction?The major product is :
Answer» What is the correct product of the following reaction? The major product is :

Discussion

935.	The increased tendency for complex formation in transition metals can be attributed to
Answer» The increased tendency for complex formation in transition metals can be attributed to

Discussion

936.	Which is/are correct statements? (3) This is only affected in reduction to 2∘ alcoholThese bonds are affected in esterification
Answer» Which is/are correct statements? (3) This is only affected in reduction to $2^{\circ}$ alcohol These bonds are affected in esterification

Discussion

937.	2-Phenyl-2-chloropropane on treatment with alc.KOH gives mainly:
Answer» 2-Phenyl-2-chloropropane on treatment with alc.KOH gives mainly:

Discussion

938.	Which of the following is not a characteristic of Planck's quantum theory of radiation?
Answer» Which of the following is not a characteristic of Planck's quantum theory of radiation?

Discussion

939.	The product (C) is:
Answer» The product (C) is:

Discussion

940.	In which of the following species are the bonds non-directional?
Answer» In which of the following species are the bonds non-directional?

Discussion

941.	The work done in erg for the reversible expansion of 1 mole of an ideal gas from a volume of 10 litres to 20 litres at 25oC is
Answer» The work done in erg for the reversible expansion of $1 m o l e$ of an ideal gas from a volume of $10 l i t r e s$ to $20 l i t r e s$ at $25^{o} C$ is

Discussion

942.	Which of the following equations is a balanced one?
Answer» Which of the following equations is a balanced one?

Discussion

943.	A 600 W mercury lamp emits a monochromatic radiation of wavelength 331.3 nm. How many photons are emitted from the lamp per second?h=6.626×10−34 Js;velocity of light =3×108 ms−1
Answer» A 600 W mercury lamp emits a monochromatic radiation of wavelength 331.3 nm. How many photons are emitted from the lamp per second? $h = 6.626 \times 10^{- 34} Js; velocity of light = 3 \times 10^{8} {ms}^{- 1}$

Discussion

944.	How many structures of F are possible ?
Answer» How many structures of F are possible ?

Discussion

945.	Which of the following graphs does not represent s-orbital?
Answer» Which of the following graphs does not represent s-orbital?

Discussion

946.	The diagonal relationship is shown by certain elements of which periods?
Answer» The diagonal relationship is shown by certain elements of which periods?

Discussion

947.	If the density of a certain gas at 30∘C and 768 torr is 1.35 kg/m3 , its density at STP would be:
Answer» If the density of a certain gas at $30^{\circ} C$ and $768$ torr is $1.35 {kg/m}^{3}$ , its density at STP would be:

Discussion

948.	The element that does not exist in the liquid state at room temperature is:
Answer» The element that does not exist in the liquid state at room temperature is:

Discussion

949.	The rate of a first order reaction has been found to be 2.45×10−6molL−1s−1at concentration C1. The value of C1 is (rate constant = 3.5×10−5)
Answer» The rate of a first order reaction has been found to be $2.45 \times 10^{- 6} m o l L^{- 1} s^{- 1}$ at concentration $C_{1}$ . The value of $C_{1}$ is (rate constant = $3.5 \times 10^{- 5}$ )

Discussion

950.	Which of the following statements is incorrect based on the graph?X, Y, Z can be different gases or the same gas at different temperatures.
Answer» Which of the following statements is incorrect based on the graph? X, Y, Z can be different gases or the same gas at different temperatures.

Discussion

Explore topic-wise InterviewSolutions in .

Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 50% of the consumed energy is converted into light. Wavelength of sodium light = 600 nm. Take h=6.6×10−34 Js and c=3×108ms−1

Chlorobenzene on heating with NH3under pressure in the presence of cuprous oxide gives

Assertion (A): Both aromatic and aliphatic primary amines produce stable diazonium salts on diazotizationReason (R): Aromatic diazonium salt exhibit resonance

Select the rate law that conforms to the following data for the reaction : A+B→ProductsExp No.[A](mol L−1)[B](mol L−1)Initial rate(mol L−1S−1)10.00120.00351×10−420.0240.0708×10−330.0240.0351×10−340.0120.0708×10−3

CH3COOEt CH3MgBr−−−−−−→ExcessP

All bonds in benzene are equal due to?

What is the oxidation state of Manganese in Manganese (VII) oxide?

1, 2, 3-trihydroxybenzene is also known as

Find the solubility of a sparingly soluble salt, BaSO4 in 0.02 M Na2SO4 solution ?(Ksp for BaSO4=1.1×10−10)

Pick up the final product in the following reaction. Product is

Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction ?

Find the pair of species having the same shape but different hybridizations of the central atom.

Which of the following species is not isoelectronic with the others?

The boiling point of a solution containing 0.61 g of benzoic acid in 50 g of carbon disulphide assuming 84% dimerization of the acid, where boiling point and Kb of CS2 being 46.2∘C and 2.3 K kg mol−1 is :

Number of moles of K2Cr2O7 reduced by one mole of Sn2+ ions (in acidic medium) is:

Which of the following will show a positive haloform test?

Convert the following condensed structure into Bond-line structure(CH3)2CHCH2CH3

The pair of electrons in the given carbanion, CH3C≡C−, is present in which orbital?

Which of the following shows electrical conduction [CBSE PMT 1999; AIIMS 1999]

Consider the following list of reagents, acidified K2Cr2O7, alkaline KMnO4,CuSO4,H2O2,Cl2,O3,FeCl3,HNO3 and Na2S2O3. The total number of reagents that can oxidise aqueous iodide to iodine is:___

Using MOT, predict which of the following species has the shortest bond length ?

The mass of a molecule of water is

Which of the following statements is correct according to the Law of mass action?

In glycyl alanine the number of sp3and sp2 hybridised carbons respectively

The molar mass of a certain gas B is double than that of A. Also the RMS velocity of gas A is 200 ms−1 at a certain temperature. RMS velocity of gas B at the temperature half of the temperature of A is:

Compare the carbon-carbon bond rotation across the compounds A, B and C:

The total number of atoms in a body centred cubic unit cell is

When the electrons of a sample of hydrogen atoms jump from the 4th orbit to the ground state, the maximum number of spectral lines observed is:

Correct order of bond length is-

Zn is related to which group

Which of the following resonating structures of 1-methoxy-1,3-butadiene is least stable?

What is the correct product of the following reaction?The major product is :

The increased tendency for complex formation in transition metals can be attributed to

Which is/are correct statements? (3) This is only affected in reduction to 2∘ alcoholThese bonds are affected in esterification

2-Phenyl-2-chloropropane on treatment with alc.KOH gives mainly:

Which of the following is not a characteristic of Planck's quantum theory of radiation?

The product (C) is:

In which of the following species are the bonds non-directional?

The work done in erg for the reversible expansion of 1 mole of an ideal gas from a volume of 10 litres to 20 litres at 25oC is

Which of the following equations is a balanced one?

A 600 W mercury lamp emits a monochromatic radiation of wavelength 331.3 nm. How many photons are emitted from the lamp per second?h=6.626×10−34 Js;velocity of light =3×108 ms−1

How many structures of F are possible ?

Which of the following graphs does not represent s-orbital?

The diagonal relationship is shown by certain elements of which periods?

If the density of a certain gas at 30∘C and 768 torr is 1.35 kg/m3 , its density at STP would be:

The element that does not exist in the liquid state at room temperature is:

The rate of a first order reaction has been found to be 2.45×10−6molL−1s−1at concentration C1. The value of C1 is (rate constant = 3.5×10−5)

Which of the following statements is incorrect based on the graph?X, Y, Z can be different gases or the same gas at different temperatures.