वि- ज्ञान के लि ए - …

वि- ज्ञान के लि ए - र्कशीट (अध्याय- 1) अधि?कतम अंक- 20 सामान्य निर्देश: i. इस प्रश्न पत्र में 13 प्रश्न हैं और सभी प्रश्न अनि- ार्य हैं। ii. प्रश्न 1 से 10 एक-एक अंक के MCQ हैं। iii. प्रश्न 11 र्देो अंकों का है। iv. प्रश्न 12 और 13, प्रत्येक चार-चार अंकों के हैं। 1. नीचे र्देी गई अभिक्रिया के बारे में निम्नलि खिEत में से कौन सा कथन ग त है? (1) 2PbO (s) + C (s) 2Pb (s) + CO2 (g) (a) ेड का अपचयन हो रहा है। (b) कार्बन डाइऑक्साइड उपचयन हो रहा है (c) ेड ऑक्साइड का उपचयन हो रहा है (d) ेड का उपचयन हो रहा है i. (a) और (b) ii (a) और (c) iii (a), (b) और (c) iv सब सही हैं 2. एक रासायनिक अभिक्रिया के समय इनमै से क्या नही होता है: (1) (a) अभिकारकों की तु ना में बिल्कु भिन्न गुणों - ा े नए पर्देार्थों का निर्माण (b) पुराने रासायनिक बं?ों का टूटना और नए रासायनिक बं?ों का बनना (c) नए उत्पार्देों के निर्माण के लि ए अभिकारकों के परमाणुओं की पुनर्व्य- स्था (d) नए उत्पार्देों के निर्माण के लि ए तत्- ों के परमाणुओं को र्देसरे तत् ू - में बर्दे ना 3. भोजन को बासी होने से रोकने के लि ए नीचे बताए गए सभी तरीकों का इस्तेमा किया जा सकता है: (1) i. भोजन को एयर-टाइट कं टेनर में स्टोर करना ii. Eाने को फ्रिज में रEना iii. भोजन को साफ और ढके हुए कं टेनरों में रEना iv. भोजन को हमेशा साफ हाथों से स्पर्श करें (a) (i) और (ii) (b) (i) और (iii)

रासायनिक अभिक्रिया क्या है

20

Food chain kise kahate Hain

Har Shankar kise kahate Hain Hindi mein

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RASAYANIK ABHIKRIYA KO SANTULIT KARNA

2024 10 c

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