Part 2 सीखो रासायनिक अभिक्रिया बनाना केवल आवर्त सारणी के मदद से |11th,12th Chemistry By Vikram sir

26 जनवरी - Happy Republic Day ? 12th बोर्ड 2024 के सभी छात्रों के लिए बहुत बड़ी खुशखबरी By Vikram Sir

Which two signs should be interchanged in the following equation to make it correct? निम्नलिखित समीकरण को सही बनाने के लिए कौन से दो चिन्हों को आपस में बदलना होगा ? 24 - 12 div 4 + 8 xx 2 = 11

The average of eleven numbers is 54. The average of the first four numbers is 48 and that of the next four numbers is 25% more than the average of the first four. The ninth number is 8 greater than the 11th number and the tenth number is 4 greater than the 11th number. What is the average of the 9th and the 10th numbers? 11 संख्याओं का औसत 54 है | पहली चार संख्याओं का औसत 48 है तथा अगली चार संख्याओं का औसत पहली चार संख्याओं के औसत से 25% अधिक है | 9वीं संख्या 11वीं संख्या से 8 अधिक है तथा दसवीं संख्या 11वीं संख्या से 4 अधिक है | 9वीं और 10वीं संख्याओं का औसत ज्ञात करें |

A pyramid has a square base. The side of square is 12 cm and height of pyramid is 21 cm. The pyramid is cut into 3 parts by 2 cuts parallel to its base. The cuts are at height of 7 cm and 14 cm respectively from the base. What is the difference (in cm^3 ) in the volume of top most and bottom most part? एक पिरामिड का आधार एक वर्ग है। वर्ग की भुजा 12 से.मी. तथा पिसमिड की ऊँचाई 21 से.मी. है। पिरामिड को उसके आधार के समांतर 2 कर्टावों से 3 भागों में काटा जाता है। कटाव आधार से. क्रमशः 7 से.मी. तथा 14 से.मी. को ऊँचाई पर है। सबसे ऊपर तथा सबसे नीचे के भाग के आयतन का अंतर ( से.मी.^3 में)क्या हैं।

The average of thirteen numbers is 80. The average of the first five numbers is 74.5 and that of the next five numbers is 82.5. The 11th number is 6 more than the 12th number and the 12th number is 6 less than the 13th number. What is the average of the 11th and the 13th numbers? तेरह संख्याओं का औसत 80 है | पहली पांच संख्याओं का औसत 74.5 और अगली पांच संख्याओं का औसत 82.5 है | 11वीं संख्या 12वीं संख्या से 6 अधिक है तथा 12वीं संख्या 13वीं संख्या से 6 कम है | 11वीं तथा 13वीं संख्याओं का औसत ज्ञात करें |

An examination was held during the 2 weeks of April 3rd-Sunday to 16th Saturday. There was 1 paper for the six subjects - Physics, Chemistry, Biology, Maths, English and Hindi. Only 1 paper per day No exam on Saturdays and Sundays and Holiday on April 5th. Only 3 exams were there in a week. Chemistry was before Biology and Maths was on the next day of Hindi. The day on which the paper of biology and maths were held was the same, while that for chemistry and physics was also the same. There was no exam for 3 days between Physics and the exam prior to it. Hindi exam on Tuesday and one exam between Hindi and English exam. There was at least a gap of one day between any 2 science paper. Which of the following exam was held on April 12th ?