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(Page 57) These students are describing some changes. What kinds of changes are they talking about?
Predict which of the following changes can be reversed and which cannot be reversed. If you are not sure, you may write that down. Why are you not...
State whether the following statements are True or False. In case a statement is False, write the correct statement. 1. Melting of wax is necessary...
Fill in the blanks in the following statements: (i) Nalini observed that the handle of her cycle has got brown deposits. The brown deposits are due...
Are the changes of water to ice and water to steam, physical or chemical? Explain.
Is curdling of milk a physical or chemical change? Justify your statement.
Natural factors, such as wind, rain, etc., help in the formation of soil from rocks. Is this change physical or chemical and why?
Read the following story titled ‘Eco-friendly Prithin’, and tick the most appropriate option(s) given in the brackets. Provide a suitable title of...
The experiments shown in Fig. 5.11a, b, c, and d were performed. Find out in which case(s) did lime water turn milky and why?