OMG!! Gya 500 ka note paani mein | Science Experiments | CBSE Class 7 | Science by Arisha Mam#shorts

Out of 100 students who appeared for the SSC examination from a school 15 students in English ; 12 students in Mathematics; 8 students in Sience 7 studens in Mathematics and Science; 4 students in English and Science 6 students in English and Mathematics; 4 students in all the three subjects could get First calss marks. How many of them have got First class marks.(ii) only in Science (i) only in Mathmatics

Acids,Bases and pH - Class 10 Science | 7 PM Master Class By Vipin Sir

Geeta has dry hair. A comb ran through her dry hair attracts small bits of paper. She observes that Neeta with oily hair combs her hair, the combs could not attract small bits of paper. She consults her teacher for this and gets the answer. She then goes to the junior classes and shows this phenomenon as physics experiment to them. All the juniors feel very happy and tell her that they will also look for such interesting things in nature and try to find the answer. She succeeds in forming a science club in her school. Read the above passage and answer the following questions. (i) What according to you are the values displayed by Geeta? (ii) Explain the phenomenon involved.

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 ?

CBSE Class 10 Science - Most Important MCQs - Physics | CBSE Board 2020