क्रिस्टल के शब्दावली एवं इकाई कोष्ठिका | Solid State |Lec -3 |Chap 1 | 12th Chemistry |By Vikram sir

क्रिस्टल के महत्वपूर्ण शब्दावली |घनीय इकाई कोशिका में परमाणुओं की संख्या |प्रश्न |यूनिट सेल तथा घनीय इकाई कोष्ठिका के प्रकार |OMR|Summary

Select the correct alternative to indicate the arrangement of the following words in a logical and meaningful order. सही विकल्प का चयन करें जो निम्नलिखित शब्दों के एक तर्कपूर्ण एवं अर्थपूर्ण क्रम को दर्शाता है | 1.State 2.Street 3.House Number 4.City 5.Country

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 ?

Select the correct alternative to indicate the arrangement of the following words in a logical and meaningful order. सही विकल्प का चयन करें जो निम्नलिखित शब्दों के एक तर्कपूर्ण एवं अर्थपूर्ण क्रम को दर्शाता है | 1.State/ राज्य 2.Individual/व्यक्ति 3.Family/ परिवार 4.Community/ समुदाय 5.Country/ देश

In chemistry, 'mole' is an essential tool for the chemical calculations. It is a basic SI unit adopted by the 14^(th) general conference on weights and measurements in 1971. A mole contains as many elementary particles as the number of atoms present in 12 g of ""^(12)C . 1 mole of a gas at STP occupies 22.4 litre volume. Molar volume of solids and liquids is not definite. Molar mass of a substance is also called gram-atomic mass or gram molecular mass. The virtual meaning of mole is plenty, heap or the collection of large numbers. 1 mole of a substance contains 6.022 xx 10^(23) elementary particles like atom or molecule. Atomic mass unit (amu) is the unit of atomic mass, e.g., atomic mass of single carbon is 12 amu. XL N_(2) , gas at STP contains 3xx10^(22) molecules. The number of molecules in x L ozone at STP will be