Posts

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...
Post a Comment
Read more

"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...
Post a Comment
Read more

"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...
Post a Comment
Read more

"Study with Mayank Sir" Chemistry mcq chapter 7 Alcohol phenol and Ether

 "Study With Mayank Sir" - Time to boost your numbers  Chapter–7 : Alcohols, Phenols and Ethers wa - 8290535520 YouTube -   https://youtube.com/@dasklibro  (NCERT Class 12 | RBSE aligned) Question type: MCQ (Knowledge based – K1) Marks: 0.5 × 50 = 25 Marks Q1. Alcohol में –OH समूह किस कार्बन से जुड़ा होता है? In alcohols, –OH group is attached to which carbon? A. sp² carbon / sp² कार्बन B. sp carbon / sp कार्बन C. sp³ carbon / sp³ कार्बन D. Aromatic carbon / एरोमैटिक कार्बन Answer: C — sp³ carbon / sp³ कार्बन Explanation: In alcohols, –OH group is attached to an sp³ hybridised carbon atom. Q2. Phenol में –OH समूह किससे जुड़ा होता है? In phenol, –OH group is attached to: A. Alkyl carbon / ऐल्किल कार्बन B. sp³ carbon / sp³ कार्बन C. Aromatic ring / एरोमैटिक रिंग D. Carbonyl carbon / कार्बोनिल कार्बन Answer: C — Aromatic ring / एरोमैटिक रिंग Explanation: In phenols, –OH group is directly attached to an aromatic ring. Q3. निम्न में से कौन प्राथमिक (primary) अल्...
Post a Comment
Read more