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प्रश्न
Explain the following:
Lime water turns milky on passing carbon dioxide gas into it.
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उत्तर
When carbon dioxide gas is passed through lime water, it turns milky because a white precipitate of calcium carbonate is formed.
Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water
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संबंधित प्रश्न
In stainless steel alloy, iron metal is mixed with ______.
Complete the process of iron rusting by filling the blanks. Suggest a way to prohibit the process.
The iron rust is formed due to........................... reaction. Different
regions on iron surface become anode and cathode.
Reaction on anode region :
`F_e(s) → Fe^(2+) (aq) +2e^-`
Reaction on anode region :
`O_2(g) + 4H^+(aq) +............................ → 2H_2 O (l) `
When Fe2+ ions migrate from anode region they react with ................... to form Fe3+ ions.
A reddish coloured hydrated oxide is formed from ............... ions. It is called rust.
`2Fe_(3+) (aq) + 4H_2O(l) → ................. + 6H_+(aq) `
A way to prevent rusting ..................................................................
What is done to prevent corrosion of metals?
What is ‘rusting’?
Answer the following question.
List two properties of alloys.
Give reason for the following:
A suspension of rust is basic in nature.
Stainless steel is an alloy of _______.
Rusting of iron : Fe2O3 : : corrosion of copper : ______
Find the odd one out and give its explanation.
The diagram shows the reaction between metal and dil. acid.
What is the reason for different behaviour of Mg in test tube B?
