Well, happy birthday in advance my children. So, did you and your friends have fun inflating balloons, cutting the cake, and eating it, giving and receiving gifts from one another?…
Before trying to answer the NCERT exercise questions, you should have a thorough understanding of class 7 Science chapter 4 i.e. ‘Acids, Bases and Salts‘.
Things like lemon, orange, pineapple, and curd, are sour in taste because they contain acids in them. So, their chemical nature is acidic.
Before trying to answer the NCERT exercise questions, you should have a thorough understanding of class 7 Science chapter 3 i.e. ‘Heat‘.
Have you ever noticed that we wear dark-coloured coats and sweaters in winter, and we wear light-coloured cotton clothes in summer?...
Sciक्षक