PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoWhich of the following do you suggest for Naveen to pick to score a centum in his exam?
A)
Statement 1: Rust as a different chemical composition from that of iron.
Statement 2: Formation of rust is an irreversible process.
B)
Statement 1: Explosion of firework is a chemical change.
Statement 2: Explosion produces heat, light, sound and unpleasant gases
C)
Statement 1: Depositing a layer of zinc on iron speeds up the process of rusting in iron articles.
Statement 2: Crystallisation is an example of physical change.
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