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Subjects
Science CBSE
Class 10
Chemical reaction and equations
Balancing the equations and its types
7.
Choose the correct answers: NCERT- Intext questions - I
Exercise condition:
3
m.
Select the appropriate answer to the following questions:
1.
Why should a magnesium ribbon be cleaned before burning in air?
To remove the oxide layer and allows for faster burning.
To remove the oxide layer and allows for slow burning.
2.
Write the balanced equation for "Sodium + Water → Sodium hydroxide + Hydrogen."
\(2Na\) + \(2H_2O\) → \(2NaOH\) + \(H_2\)
\(2Na\) + \(3H_2O\) → \(3NaOH\) + \(H_2\)
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