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An Ellingham diagram provides information about :
Option: 1 The conditions of pH and potential under which a species is  thermodynamically stable
Option: 2 The temperature dependence of the standard Gibbs energies of  formation of some metal oxides.
Option: 3 The pressure dependence of the standard electrode potentials of the extraction of metals.
Option: 4 The kinetics of the reduction process.

The temperature dependence of the standard Gibbs energies of formation of some metal oxides.

An Ellingham diagram plots ΔG° (standard Gibbs free energy change) vs temperature for the formation of metal oxides. It helps predict the feasibility of reducing metal oxides at different temperatures.

 

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Divya Sharma

Read the given passage and answer the question  : Organic compounds containing amine as functional group are present in a vivid variety of compounds, namely amino acids, hormones, neurotransmitters, DNA, alkaloids, dyes, etc. Drugs including nicotine, morphine, codeine and heroin, etc. which have physiological effects on humans also contain amino group in one form or another. Amines are basic because of the presence of lone pair of electrons on nitrogen. Addition of nitrogen into an organic framework leads to the formation of two families of molecules, namely amines and amides. As chemistry students, we must appreciate the versatility of nitrogen. Give one point of difference between acidic and basic amino acid.
 

Acidic amino acids- They have more number of carboxyl groups than amino groups. whereas

Basic amino acids- have more number of amino groups than carboxyl groups.

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Safeer PP

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Iodoform test is given by 
Option: 1 Pentan-2-one
Option: 2 Ethanoic acid
Option: 3 Pentan-3-one
Option: 4 Methoxymethane

Ask questions answer she saw a tiger

 

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Diganta Bora

Read the given passage and answer the questions that follow : The substitution reaction of alkyl halide mainly occurs by S_{N}1 or S_{N}2 mechanism. Whatever mechanism alkyl halides follow for the substitution reaction to occur, the polarity of the carbon halogen bond is responsible for these substitution reactions. The rate of S_{N}1reactions are governed by the stability of carbocation whereas for S_{N}2 reactions steric factor is the deciding factor. If the starting material is a chiral compound, we may end up with an inverted product or racemic mixture depending upon the type of mechanism followed by alkyl halide. Cleavage of ethers with HI is also governed by steric factor and stability of carbocation, which indicates that in organic chemistry, these two major factors help us in deciding the kind of product formed. Write the structures of the products formed when ethoxybenzene is treated with HI.

Products formed when ethoxybenzene is treated with HI are

C2H5I + C6H5OH

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Safeer PP

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Iodoform test is not given by 
Option: 1 Hexan-2-one
Option: 2 Hexan-3-one 
Option: 3 Ethanol 
Option: 4 Ethanal

 Iodoform test is not given by Hexan-3-one, since it is not methyl ketone 

Hence option B is correct 

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Safeer PP

(a) Give the mechanism for the formation of ethanol from ethene.  (b) Predict the reagent for carrying out the following conversions :     (i) Phenol to benzoquinone     (ii) Anisole to p-bromoanisole     (iii) Phenol to 2,4,6-tribromophenol
 

(a) Mechanism for the formation of ethanol from ethene- 

 (b) Reagent for carrying out the following conversions :

    (i) Phenol to benzoquinone

  •    K2Cr2O7 + H2SO4

    (ii) Anisole to p-bromoanisole

  •  Br2 in CH3COOH

    (iii) Phenol to 2,4,6-tribromophenol

  •  Br2 aq. / Bromine water

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Safeer PP

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Asseration and Reasoning question: (i) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A). (ii) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A). (iii) Assertion (A) is correct, but Reason (R) is incorrect statement. (iv) Assertion (A) is incorrect, but Reason (R) is correct statement. Assertion (A) : The molecularity of the reaction H_{2} + Br_{2} \rightarrow 2HBr appears to be 2. Reason (R) : Two molecules of the reactants are involved in the given elementary reaction.
 

Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).

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Safeer PP

Asseration and Reasoning qustion: (i) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A). (ii) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A). (iii) Assertion (A) is correct, but Reason (R) is incorrect statement. (iv) Assertion (A) is incorrect, but Reason (R) is correct statement. Assertion (A) : Sucrose is a non-reducing sugar. Reason (R) : Sucrose has glycosidic linkage.
 

(ii) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).

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Assertaion and Reasoning question: (i) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A). (ii) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A). (iii) Assertion (A) is correct, but Reason (R) is incorrect statement. (iv) Assertion (A) is incorrect, but Reason (R) is correct statement.  Assertion (A) : F – F bond in F2 molecule is weak. Reason (R) : F atom is small in size
 

(ii) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).

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Safeer PP

What is the correct IUPAC name of the given compound ?
Option: 1 2,2-Dimethylbutanoic acid 
Option: 2 2-Carboxyl-2-methylbutane 
Option: 3 2-Ethyl-2-methylpropanoic acid 
Option: 4 3-Methylbutane carboxylic acid

 IUPAC name of the compound:

2,2-Dimethylbutanoic acid 

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Safeer PP

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