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Class 12 Extra questions English Flamingo Chapter 3 Deep Water by William Douglas

Class 12 Extra questions                    English Flamingo Chapter 3                                                                           Deep Water by William Douglas 1. Q: What initial event led to Douglas's fear of water?    A: Douglas's fear of water began when he was thrown into the deep end of the Y.M.C.A. pool by a bully, nearly causing him to drown.   2. Q: How did Douglas’s early experiences at the beach contribute to his fear?    A: As a child, Douglas had been knocked down by waves at a beach in California, which left him frightened of water. 3. Q: Why did Douglas decide to learn swimming despite his fear?    A: Douglas decided to learn swimming to overcome his debilitating fear and regain confidenc...
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"Study With Mayank Sir" Chemistry Short Answer Type Chapter 1 Solution

 "Study With Mayank Sir" - To be on top WA - 8290535520 Youtube- https://www.youtube.com/@dasklibro Chapter 1 – Solutions   Question Type: Short Answer (Application-based)  Marks: 1.5 marks each  Total Questions: 50 Q1. Why is molality preferred over molarity in studies involving change in temperature? तापमान परिवर्तन से संबंधित अध्ययनों में मोलालता को मोलरता पर वरीयता क्यों दी जाती है? Answer: Molality is independent of temperature because it depends on mass, not volume. मोलालता तापमान पर निर्भर नहीं करती क्योंकि यह द्रव्यमान पर आधारित होती है, आयतन पर नहीं। Q2. Why does addition of a non-volatile solute lower the vapour pressure of a solvent? अवाष्पशील विलेय मिलाने पर विलायक का वाष्प दाब क्यों घटता है? Answer: Non-volatile solute reduces the number of solvent molecules at the surface. अवाष्पशील विलेय विलायक अणुओं की सतह पर संख्या कम कर देता है। Q3. Why is NaCl considered an abnormal solute in colligative property measurements? सहगुणात्मक गुणों में NaCl को असाम...
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"Study With Mayank Sir" Chemistry Short Answer Type Chapter 10 Biomolecules

 "Study With Mayank Sir" - To cover the entire syllabus with ease  WA - 8290535520 Youtube- https://www.youtube.com/@dasklibro Chapter 10 – Biomolecules (NCERT Class 12) Short Answer Questions (1.5 Marks Each) Total Questions: 50  Question Type: Understanding-based Q1. What are biomolecules? जैव-अणु (Biomolecules) क्या हैं? Answer: Biomolecules are organic molecules present in living organisms which are essential for life processes. जैव-अणु वे कार्बनिक अणु हैं जो जीवित प्राणियों में पाए जाते हैं और जीवन क्रियाओं के लिए आवश्यक होते हैं। Q2. Why carbohydrates are called hydrates of carbon? कार्बोहाइड्रेट को कार्बन का जलयोजित यौगिक क्यों कहा जाता है? Answer: Because their general formula is Cₓ(H₂O)ᵧ, they appear as hydrated carbon compounds. क्योंकि इनका सामान्य सूत्र Cₓ(H₂O)ᵧ होता है, इसलिए इन्हें कार्बन के जलयोजित यौगिक कहा जाता है। Q3. Define monosaccharides. मोनोसैकराइड को परिभाषित कीजिए। Answer: Monosaccharides are carbohydrates that cannot be hydrolysed into simpler un...
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"Study With Mayank Sir" Chemistry Very short Answer Type Chapter 4 d and f block

" Study With Mayank Sir" - To get the skilled approach WA - 8290535520 Youtube- https://www.youtube.com/@dasklibro 📘 Chapter 4: The d- and f-Block Elements 🔹 Question Type: Very Short Answer (Application-based) 🔹 Marks: 1 mark each Q1. Why do transition metals show variable oxidation states? ट्रांज़िशन धातुएँ परिवर्ती ऑक्सीकरण अवस्थाएँ क्यों दिखाती हैं? Answer: Because of small energy difference between (n−1)d and ns orbitals. (n−1)d और ns कक्षाओं की ऊर्जा में कम अंतर होने के कारण। Q2. Which property of transition metals makes them good catalysts? कौन-सा गुण ट्रांज़िशन धातुओं को अच्छा उत्प्रेरक बनाता है? Answer: Variable oxidation states and formation of intermediate complexes. परिवर्ती ऑक्सीकरण अवस्था और मध्यवर्ती यौगिक बनाने की क्षमता। Q3. Why are transition metal compounds coloured? ट्रांज़िशन धातु यौगिक रंगीन क्यों होते हैं? Answer: Due to d–d electronic transitions. d–d इलेक्ट्रॉनिक संक्रमण के कारण। Q4. Why is Zn not considered a transition metal? Zn को ट्रांज़िशन धात...
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"Study With Mayank Sir" Chemistry mcq chapter 9 Amine

 "Study With Mayank Sir" - to recognise your self worth  Chapter 9 – Amines wa - 8290535520 Youtube - https://youtube.com/@dasklibro  MCQ type | Knowledge-based | 0.5 mark each Total Questions: 50 Q1. Amines are derivatives of which compound? Amines किस यौगिक के व्युत्पन्न (derivatives) हैं? A. Methane / मीथेन B. Ammonia / अमोनिया C. Ethane / एथेन D. Water / जल ✅ Answer: B —  Ammonia / अमोनिया Explanation (English): Amines are formed by replacing one or more hydrogen atoms of ammonia by alkyl or aryl groups. Q2. Which functional group is present in amines? Amines में कौन-सा functional group होता है? A. –OH B. –COOH C. –NH₂ D. –CHO ✅ Answer: C —  –NH₂ / –NH₂ Explanation: Amines contain amino group (–NH₂, –NHR, –NR₂). Q3. The geometry of amines is: Amines की geometry होती है: A. Linear / रेखीय B. Trigonal planar / त्रिकोणीय समतल C. Pyramidal / पिरामिडीय D. Tetrahedral / चतुष्फलकीय ✅ Answer: C —  Pyramidal / पिरामिडीय Explanation: Due to one lone pair on nitro...
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"Study With Mayank Sir" Chemistry MCQ Chapter 8 Aldehyde Ketone and Carboxylic Acids

"Study with Mayank Sir" - To be ahead in exam room . Chapter–8 Aldehydes, Ketones and Carboxylic Acids WA - 8290535520 Youtube -  https://youtube.com/@dasklibro Question Type: MCQ (Application-based) Marks: 0.5 × 50 = 25 marks Q1. Which compound will give silver mirror test? कौन-सा यौगिक सिल्वर मिरर टेस्ट देगा? A. Acetone / एसीटोन B. Benzaldehyde / बेंज़ाल्डिहाइड C. Benzophenone / बेंज़ोफिनोन D. Acetophenone / एसीटोफिनोन ✅ Answer: B – Benzaldehyde / बेंज़ाल्डिहाइड Explanation: Aldehydes give Tollens’ test; benzaldehyde is an aldehyde. Q2. Which reagent distinguishes aldehyde from ketone? एल्डिहाइड और कीटोन में अंतर करने वाला अभिकर्मक कौन-सा है? A. Fehling solution / फेलिंग विलयन B. Grignard reagent / ग्रिग्नार्ड अभिकर्मक C. NaBH₄ / सोडियम बोरोहाइड्राइड D. PCl₅ / पीसीएल₅ ✅ Answer: A – Fehling solution / फेलिंग विलयन Explanation: Aldehydes reduce Fehling solution; ketones do not. Q3. Which compound does NOT undergo Cannizzaro reaction? कौन-सा यौगिक कैनिज़ारो अभिक्रिया नहीं करता...
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