This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Here are the answers to the multiple-choice questions: i) दो या दो से अधिक परमाणुओं का समूह कहलाता है - A group of two or more atoms chemically bonded together is called a molecule. The correct option is (d). Answer: d) अणु (Molecule) ii) सबसे पहले परमाणु के किस कण की खोज हुई? The electron was the first subatomic particle discovered, by J.J. Thomson. The correct option is (c). Answer: c) इलेक्ट्रॉन (Electron) iii) सोडियम का इलेक्ट्रॉनिक विन्यास है - Sodium (Na) has 11 electrons. Its electronic configuration is 2 electrons in the first shell, 8 in the second, and 1 in the third. The correct option is (d). Answer: d) 2, 8, 1 iv) प्रति इकाई समय में चली गई दूरी को कहते हैं - The distance traveled per unit time is defined as speed. The correct option is (a). Answer: a) चाल (Speed) v) वेग का SI मात्रक - Velocity is displacement per unit time. The SI unit for displacement is meters (m) and for time is seconds (s), so the SI unit for velocity is meters per second. SI unit of velocity = ms = m s^-1 The correct option is (c). Answer: c) ms^-1 vi) निम्नलिखित में से कौन खरीफ फसलें हैं? Kharif crops are monsoon crops, typically sown during the rainy season. Rice is an example of a kharif crop. The correct option is (d). Answer: d) चावल (Rice) That's 2 down. 3 left today — send the next one.