In which of the following case benzene is formed?
Sodium benzoate is heated with sodalime correct as per chemistry principle.
Ref: NCERT Chemistry Class XII — Organic Chemistry
#reaction conditions
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Which amine forms a product with a benzene ring when reacted with H₂SO₄ at 453-473 K?
Aniline (C₆H₅NH₂) forms sulphanilic acid (H₂NC₆H₄SO₃H) with a benzene ring when reacted with H₂SO₄ at high temperature, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Physical Properties, Basic Character and Solubility
Which reaction condition converts 2-methylpropan-2-ol to an alkene fastest?
Conc. H₂SO₄ at 140°C rapidly dehydrates 2-methylpropan-2-ol, a tertiary alcohol, to 2-methylpropene via a stable tertiary carbocation in an E₁ mechanism.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Chemical Reactions of Alcohols - Dehydration Oxidation Esterification
The standard enthalpy change of a reaction (ΔH°) is measured at:
298K and 1 atm is the scientifically accurate answer to this question. Within the study of Kinetics and Thermodynamic, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of 298K and 1 atm directly address what is being asked. Among the other options, 273K and 1 atm, 310K and 1 atm, and 350K and 2 atm do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about
Ref: Campbell Biology, Urry et al., 12th Ed.
If ΔH is positive and ΔS is negative, the reaction is:
Never spontaneous is the scientifically accurate answer to this question. Within the study of Thermodynamics, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Never spontaneous directly address what is being asked. Among the other options, Always spontaneous, Spontaneous at high temperatures, and Spontaneous at low temperatures do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or repr
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 1
