CBSE 2025 · Region 2 · Set 1 · Q4 · 1 mark
Aluminium powder is used in thermit welding because :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
When it is heated with iron (III) oxide, molten iron is obtained.
Metals and Non-metalsChemical Properties of MetalsRemembermcqmedium
More from Metals and Non-metals
- A metal, M, displaces iron from aqueous solution of ferrous sulphate but fails to do so in case of aqueous…2025 · asked 3×
- Two metals zinc and tin are dissolved separately in definite proportions in molten copper (the primary metal)…2025 · asked 3×
- During electrolytic refining of copper, the anode, the cathode and the electrolyte used respectively are2025 · asked 3×
- "Displacement reactions also play a key role in extracting metals in the middle of the reactivity series."…2025 · asked 3×
- The products formed when Aluminium and Magnesium are burnt in the presence of air respectively are:2025 · asked 3×
- Reaction between two elements A and B, forms a compound C. A loses electrons and B gains electrons. Which one…2025 · asked 3×
- A metal, 'X', on treatment with sodium hydroxide liberates a gas 'G'. It also liberates the same gas, 'G' on…2025 · asked 3×
- (i) Consider the following metals: K, Ca, Al, Cu, Ag, Fe Select from the above metals, a metal which I. does…2025 · asked 3×
CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.