Chemistry
The common name for the compound having formal NaOH is

Soda ash
Sodium hydroxide
Caustic potash
Caustic soda

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Chemistry
The open "Sigrees" or coal stoves often require fanning to sustain burning because of

Lack of oxygen in the surroundings of sigrees
Interrupted release of moisture from the material
Accumulation of smoke and dust over the sigrees
Tendency of carbon dioxide to form a layer along with dust smoke

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Chemistry
An oxidising agent is a

An electron donor
It releases H2 in a chemical reaction
An electron acceptor
In a chemical reaction its oxidation number increases

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