संतुलित आहार Kyu hai Zaruri!!! Useful Vitamins Aur Minerals for Body | 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 ?

Mohan is a student of class 6 . One day , his science teacher taught him electricity . After that, he had many doubts about the electical appliances and measuring devices that are used in his home . He observed that a wire from an electric pole is connected to a joule meter. A , fixed to the walll in the veranda, and from there to a main switch , and then to the main fuse, a refrigerator, a fan and a bulb are connected in parallel. Find out the appliance that consumes the least electric power among them.

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