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Ethylamine (CH₃CH₂NH₂, 2C) reacts with acetyl chloride (CH₃COCl, 2C) to form N-ethylacetamide (CH₃CONHCH₂CH₃, 4C), as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Physical Properties, Basic Character and Solubility
Methylamine (CH₃NH₂) has one carbon in its alkyl group, the least among the options, as per the PDF’s classification.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Physical Properties, Basic Character and Solubility
Pentane-2,4-diol (CH₃-CH(OH)-CH₂-CH(OH)-CH₃) has a 5-carbon chain, as counted from one end to the other: CH₃-CH-CH₂-CH-CH₃.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Chemical Reactions of Phenols and Ethers and Uses
Pick B: 10. Thinking through PLANT SEC METABOLITES step by step rules out the lookalikes and leaves 10. Skip these: A) 5; C) 15; D) 20. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.
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