"जानो शरीर के सभी प्रमुख जोड़ [BODY JOINTS in Humans] in One Shot!!! | Class 6 Science | Doubtnut

One day Vabhav was performing experiments in the science laboratory based on the of chemical combination. Just then his chemistry teacher, Mr. Rajeev, came into the laboratory. Mr. Rajeev told Vaibhav that in an experiment conducted byby a class IX student when 10.6 g of sodium carbonate was reacted with 12.0g of ethanoic acid in a closed flask, then 16.4 g of sodium ethanoate, 4.4 g of carbon dioxide and an unknown mass of substances Y were produced. Mr. Rajeev asked Vaibhav to make use of this information and answer the following questions : (a) Write a word equation for the reaction which takes place on reacting sodium carbonate and ethanoic acid (b) Which is the substance Y which is produced in this reaction ? (c) What mass of substance Y is produced in this reaction ? (d) Which law of chemical combination has been made use of in calculating the mass of substance Y ? State this law (e) What values are displayed by Vaibhav in this eposide ?

An organization wants to recruit Trainee Officers. Following are the criteria. The candidate must (i) be not less than 21 years of age and not more than 28 years of age as on 1.2.2009. (ii) be a graduate in any discipline with at least 55% marks. (iii) have secured at least 50% marks in selection test. (iv) have secured at least 45% marks in interview. (v) be willing to work anywhere in India. However, if the candidate satisfies all the above-mentioned criteria EXCEPT - (A) at (ii) above but is a postgraduate, the case is to be referred to the Executive Director. (B) at (i) above but has a working experience of at least one year the case is to be referred to the Vice-President. In each of the questions below, information of one candidate is given. You have to take one of the following five dedsions based on the information provided and the criteria and conditions given above. You are not to assume anything other than the information provided in each question. All these cases are given to you as on 1.2.2009. You have to indicate your dedsion by marking answers to each question as follows : Avinash is a Science graduate passed in first class with 63% marks. He has secured 53% and 51 % marks in selection test and interview respectively. He is willing to work anywhere in India. He has been working in the Marketing department of a private organization since July 2007. He was born on 11.6.1980.