Bacterial Growth and Decay Graphs in Chemical Kinetics
❓ Question A person's wound was exposed to bacteria and bacterial growth started. Later, antibacterial medicine was applied and bacterial dec…
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LCM × HCF = Product of Numbers Explained
❓ Question Given that: HCF ( 306 , 657 ) = 9 \text{HCF}(306,657)=9 Find: LCM ( 306 , 657 ) \text{LCM}(306,657) 🖼️ Solution Image ✍️ Short S…
HCF & LCM of Three Numbers Using Prime Factorisation
❓ Question Find the LCM and HCF of the following integers by applying the prime factorisation method : (i) 12, 15 and 21 (ii) 17, 23 and 29 (i…
Verify LCM × HCF = Product of Two Numbers
❓ Question Find the LCM and HCF of the following pairs of integers and verify that: LCM × HCF = Product of the two numbers (i) 26 and 91 (ii) 5…
Match Bond Pair and Lone Pair on Central Atom
❓ Question Match the following molecules/ions with the ratio: Bond pair : Lone pair (on the central atom) Molecule/Ion Ratio Options A. I C l 2 …
Bond Pair and Lone Pair Counting Shortcut
❓ Concept Question How do we quickly find the ratio of: Bond Pairs : Lone Pairs on the central atom in molecules and ions? 🖼 Concept Image …
Ammonia Detection Using Nessler Reagent Trick
❓ Concept Question How do we identify NH₃ gas in salt analysis using confirmatory tests ? 🖼 Concept Image ✍️ Short Concept This is a stand…
Identify Gas and Reagent from Brown Precipitate
❓ Question When a salt is treated with NaOH , gas X is evolved. Passing gas X through reagent Y gives a brown coloured precipitate . Find X and …
Express Numbers as Product of Prime Factors
❓ Question Express each number as a product of its prime factors: (i) 140 (ii) 156 (iii) 3825 (iv) 5005 (v) 7429 🖼️ Solution Image ✍️ S…