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No verified paper has been uploaded for PPSC-PMS Paper Chemistry 2005 MCQs yet. The MCQs below are drawn from the Chemistry subject category.
Oxidation of a secondary alcohol forms a ketone, as the reaction targets the carbon with two alkyl groups, creating a carbonyl group.
When aldehydes are heated with Fehlings solution, a precipitate forms. This precipitate is characterized by its color. Among the given options, 'brick red' is the correct answer. The reaction involves the oxidation of aldehydes to their corresponding carboxylic acids, which forms a complex copper(II) ion with the Fehling's reagent. The resulting color is brick red.
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Aluminium oxide (Al2O3) is formed from 2 moles of Al and 3/2 moles of O2. Assuming equal moles of Al and O2 react, the limiting reagent determines the product amount. If moles of Al and O2 are equal, 0.18 mole of Al2O3 is formed as 2 moles of Al produce 1 mole of Al2O3.
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Grignard reagents react with carbon dioxide to form carboxylic acids. This is a common method for synthesizing carboxylic acids, particularly those with complex substituents.
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Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
