NEET Exam > NEET Notes > Chemistry Class 12 > Mnemonics: Principles Related to Practical Chemistry
Mnemonics: Principles Related to Practical Chemistry | Chemistry Class 12 - NEET PDF Download
Detection of Extra Elements in Organic Compounds
A. Nitrogen
Mnemonic: "Nifty Nitrogen Needs Sodium"
Explanation: Detection of nitrogen using sodium nitroprusside.
B. Sulfur
Mnemonic: "Sulfur Shines with Lead"
Explanation: Sulfur detection using lead acetate paper.
C. Halogens
Mnemonic: "Halogens Have Silver Nitrate"
Explanation: Halogen detection using silver nitrate.
D. Phosphorus
Mnemonic: "Phosphorus Prepares with Ammonium"
Explanation: Phosphorus detection using ammonium molybdate.
Functional Groups in Organic Compounds
A. Hydroxyl Group (Alcoholic and Phenolic)
Mnemonic: "Hot Sodium, Cold Iron"
Explanation:
Alcoholic: Test with sodium.
Phenolic: Test with ferric chloride.
B. Carboxyl Group
Mnemonic: "Soda Bicycle Release CO2"
Explanation: Reaction with sodium bicarbonate releases carbon dioxide (CO2).
C. Amino Group
Mnemonic: "Almonds Niifts Ninhydrin"
Explanation: Detection of amino group using the ninhydrin test (turns blue/purple).
Titrimetric Exercises
A. Acids and Bases
Mnemonic: "Always Balance, End Strong"
Explanation: Always balance equations in acid-base titrations.
B. Oxalic Acid vs KMnO4
Mnemonic: "Ox Mohr Powers Potassium"
Explanation: Oxalic acid reacts with potassium permanganate.
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FAQs on Mnemonics: Principles Related to Practical Chemistry - Chemistry Class 12 - NEET
| 1. What are the common methods for detecting extra elements in organic compounds? |  |
Ans. Common methods for detecting extra elements in organic compounds include elemental analysis, which involves combustion of the compound to determine the percentage of carbon, hydrogen, nitrogen, and sulfur present. Other techniques include qualitative tests such as the use of reagents that produce characteristic colors or precipitates when reacting with specific elements.
| 2. What are the major functional groups in organic compounds? | |
Ans. Major functional groups in organic compounds include hydroxyl (-OH), carbonyl (C=O), carboxyl (-COOH), amine (-NH2), ester (-COOR), and alkyl (R-) groups. Each functional group imparts distinct chemical properties and reactivity to the compounds.
| 3. What chemistry principles are involved in the preparation of organic compounds? | |
Ans. The preparation of organic compounds often involves principles such as functional group transformations, nucleophilic substitutions, electrophilic additions, and rearrangements. Techniques like synthesis via Grignard reagents, condensation reactions, and polymerization are commonly used in organic synthesis.
| 4. How do the preparation methods for inorganic compounds differ from those of organic compounds? | |
Ans. Inorganic compounds are typically prepared through methods such as precipitation, neutralization, and redox reactions, which often involve ionic interactions. In contrast, organic compound synthesis primarily relies on covalent bond formation and functional group transformations, focusing on molecular structure and stability.
| 5. What are some mnemonics to remember principles related to practical chemistry for NEET? | |
Ans. Mnemonics can be helpful for remembering practical chemistry principles. For example, "Silly Little Elephants Can Always Make Cookies" can help recall the steps of titration: Standardization, Liquid measurement, Endpoint determination, Calculation, and Maintenance of equipment. Creating personalized mnemonics can also enhance memorization.
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