Podcast
Questions and Answers
The role of CO2 in Kolbe’s reaction is?
The role of CO2 in Kolbe’s reaction is?
- Acts as catalyst
- Acts as weak electrophile (correct)
- Acts as nucleophile
- Acts as strong electrophile
In DNA, the linkage between different nitrogenous bases is?
In DNA, the linkage between different nitrogenous bases is?
- Hydrogen bonding (correct)
- Glycosidic linkage
- Phosphate linkage
- Peptide linkage
The primary and secondary valence of the complex PtCl2·4NH3Br2 is?
The primary and secondary valence of the complex PtCl2·4NH3Br2 is?
- 3 and 6
- 6 and 2 (correct)
- 4 and 6
- 6 and 1
Identify the correct statements: Statement I: Enantiomers are non-superimposable mirror images on each other. Statement II: A racemic mixture shows zero optical rotation.
Identify the correct statements: Statement I: Enantiomers are non-superimposable mirror images on each other. Statement II: A racemic mixture shows zero optical rotation.
The most stable manganese compound is?
The most stable manganese compound is?
An ambidentate ligand is?
An ambidentate ligand is?
Which metal/s acts as sacrificial electrode to protect iron from rusting?
Which metal/s acts as sacrificial electrode to protect iron from rusting?
The chemical name of phosgene is?
The chemical name of phosgene is?
In a solution containing non-volatile solute, the mole fraction of solvent is 0.9. What is the relative lowering of vapor pressure?
In a solution containing non-volatile solute, the mole fraction of solvent is 0.9. What is the relative lowering of vapor pressure?
All natural and artificial radioactive decay of unstable nuclei take place by?
All natural and artificial radioactive decay of unstable nuclei take place by?
Match the following hormones with their functions:
Match the following hormones with their functions:
Study Notes
Exam Structure
- Class: II Year PUC
- Subject: Chemistry
- Academic Year: 2024-25
- Maximum Marks: 70
- Duration: 3.00 Hours
- Total Questions: 46
Instructions
- Question paper consists of five compulsory parts.
- Marks distribution:
- Part-A: 20 Marks (1 mark per question, 20 questions)
- Part-B: 12 Marks (2 marks per question, 6 questions)
- Part-C: 45 Marks (3 marks per question, 15 questions)
- Part-D: 100 Marks (5 marks per question, 20 questions)
- Part-E: 27 Marks (3 marks per question, 9 questions)
- Only the first attempted answer in Part-A will be considered for marks.
- Requires balanced chemical equations and neat diagrams/graphs where necessary.
- Direct numerical answers without detailed calculations carry no marks.
- Ensure the correct units are provided in numerical answers.
- Log tables and simple calculators allowed; scientific calculators are prohibited.
- Alternate questions available for visually impaired students, specifically for circuit diagrams/figures/graphs.
Sample Questions from Part-A
- Identify the role of CO2 in Kolbe’s reaction.
- Determine the linkage between nitrogenous bases in DNA.
- Analyze complex PtCl2.4NH3Br2 to identify its primary and secondary valences.
- Evaluate the statements regarding enantiomers and racemic mixtures for correctness.
- Identify the most stable manganese compound from the given options.
Key Concepts
- Enantiomers: Non-superimposable mirror images; racemic mixtures exhibit zero optical rotation.
- Stability of Compounds: MnO2 is identified as the most stable manganese compound among the listed options.
- Alkyl Benzenes: Certain alkyl benzenes do not yield benzoic acid upon oxidation with KMnO4.
- Ambidentate Ligands: Defined as ligands that can bind through multiple atoms (e.g., CN^– and NO^+2).
- Sacrificial Electrode: Metals such as Zn can act as sacrificial electrodes to protect iron from corrosion.
Additional Topics
- Chemical Names: Phosgene is identified as carbonyl chloride.
- Vapor Pressure: Understanding mole fraction and its effect on vapor pressure lowering.
- Radioactive Decay: Occurs predominantly via first-order kinetics.
Matching Questions
- Match glucocorticoids with their role in human biology (e.g., development of secondary female characteristics).
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Description
This quiz covers the structure of the II Year PUC Chemistry exam for the academic year 2024-25. It details the marks distribution, question format, and specific requirements for each part of the exam. Students are advised to focus on balanced equations and proper units in their answers.
