Choose the best: Chemical reactions and equations — task. Science CBSE, Class 10.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Choose the best answer:

1. The magnesium ribbon is cleaned with sandpaper before it is burned in the air. Why?

Remove the deposited carbonate layer on magnesium ribbon.
Remove the deposited nitride layer on magnesium ribbon.
Remove the deposited oxide layer on magnesium ribbon.
Remove the deposited oxide layer on copper ribbon.

2. Change the following statements into chemical equations.

Hydrogen combine the chlorine to form hydrogen chloride.

\(H_2\) + \(Cl_2\) → \(2HCl\)
\(H_2\) + \(Cl\) → \(2HCl\)
\(H_2\) + \(Cl_2\) → \(HCl\)
\(H_3\) + \(Cl_2\) → \(2HCl\)

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