Class 7 NCERT • Curiosity Science Portal
Ch 04: The World of Metals and Non-metals
Select a topic or study module below to explore malleability and ductility, sonority and conductivity, rusting of iron, acidic vs basic oxides, uses of elements, NCERT solutions, and quizzes.
Topic 01 • Lustre, Sheets & Wires
Metallic Lustre, Hardness Exceptions (Na, K, Hg), Malleability & Ductility
Topic 02 • Sound, Heat & Electricity
Sonority in Metal Bells, Heat Conduction in Utensils & Electrical Conductivity
Topic 03 • Rusting & Metal Oxides
Conditions for Rusting of Iron, Sodium in Kerosene & Burning Magnesium Ribbon
Topic 04 • Non-Metals & Acidic Oxides
Brittleness of Non-Metals, Phosphorus in Water & Burning Sulfur (Acidic Oxide)
Topic 05 • Elements & Daily Uses
118 Elements, Uses of O, C, N, Cl & Iodine, Iron Pillar of Delhi & Metal Recycling
Module 06 • Solutions & HOTS