What are the most repeated and important questions for the BISE Faisalabad Class 10 Chemistry paper?

BISE Faisalabad Class 10 Chemistry ke paper ke liye yeh **sab se zyada repeat hone wale aur important questions** hain: --- ### **Important Short Questions** 1. **Chemical Equilibrium (Ch 9):** * Reversible aur Irreversible reactions mein kya farq hai? * Dynamic Equilibrium ki do (2) mikroskopik khusoosiyat (macroscopic properties) likhein. * $K_c$ (Equilibrium Constant) ki tareef aur is ki importance bataein. 2. **Acids, Bases & Salts (Ch 10):** * Arrhenius aur Bronsted-Lowry concept ke mutabiq Acid aur Base ki tareef karein. * Conjugate Acid aur Conjugate Base mein kya farq hai? * $\text{pH}$ aur $\text{pOH}$ se kya murad hai? * Amphoteric compounds kya hote hain? (e.g., Water). 3. **Organic Chemistry (Ch 11):** * Catenation se kya murad hai? Organic compounds ke liye yeh kyun zaroori hai? * Homologous series ki do khusoosiyat likhein. * Functional group ki tareef karein aur Alcohol aur Aldehyde ka functional group batayein. 4. **Hydrocarbons (Ch 12):** * Saturated aur Unsaturated hydrocarbons mein kya farq hai? * Hydrogenation se kya murad hai? Is ka industrial istemal batayein (Ghee banana). 5. **Biochemistry & Atmosphere (Ch 13 & 14):** * Monosaccharides aur Disaccharides mein farq batayein. * DNA aur RNA mein kya farq hai? * Greenhouse Effect aur Global Warming ki wazahat karein. * Acid rain ke do nuqsanat likhein. 6. **Water & Chemical Industries (Ch 15 & 16):** * Temporary aur Permanent hardness of water mein kya farq hai? * Solvay's process ke raw materials (kham maal) ke naam likhein. * Roasting aur Smelting mein farq batayein. --- ### **Important Long Questions** 1. **Law of Mass Action** ki wazahat karein aur general reaction ke liye $K_c$ ki expression derive karein. 2. **Lewis Concept of Acids and Bases** ko udaharan (examples) ke sath samjhaein. 3. **Hardness of water** ko khatam karne ke tareeqay: * Clark's method (for temporary hardness) * Ion-exchange resin method (for permanent hardness) 4. **Solvay's Process** ke mukhtalif steps aur is ke faaide (advantages) detail mein likhein. 5. **Alkanes ki Halogenation** ya **Alkenes ki Hydrogenation/Addition reactions** par note likhein. --- Agar aap ko in mein se kisi bhi question ka answer ya explanation chahiye ho, toh mujhe zaroor batayein!