ScienceCLASS 9CBSEanswered 27 Mar 2026Q.Which one of the following is a correct electronic configuration of Sodium? (a) 2, 8 (b) 8, 2, 1 (c) 2, 1, 8 (d) 2, 8, 1A.VERIFIED ANSWERfact-checked by tutorsSolution: (d) 2, 8, 1Suggested Q&ASCIENCE · CLASS 9ScienceCLASS 9Q.1. Why does the temperature of a substance remain constant during its melting point or boiling point?ScienceCLASS 9Q.Comment on the following statements: (a) Evaporation produces cooling. (b) Rate of evaporation of an aqueous solution decreases with increase in humidity. Sponge though compressible is a solid.ScienceCLASS 9Q.You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?ScienceCLASS 9Q.It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?ScienceCLASS 9Q.Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. CommentScienceCLASS 9Q.Water as ice has a cooling effect, whereas water as steam may cause severe burns. Explain these observations.← More Science Q&A for Class 9BROWSE ALL Q&A →
