Question Detail

What is hottest part of the gas flame is called ?

blue zone
luminous zone
dark zone
non-luminous zone

Answer: Option D

Similar Questions :

1. What is used to avoid melting of ice ?

Gelatine
Butane
Methane
Any acid

Answer: Option A

2. Which one of the following metals does not react with water to produce Hydrogen?

Cadmium
Lithium
Potassium
Sodium

Answer: Option A

3. Which gas is used to manufacture vanaspati from vegetable oil is

carbon dioxide
nitrogen
oxygen
hydrogen

Answer: Option D

4. What among following is used to produce artificial rain ?

copper oxide
carbon monoxide
silver iodide
silver nitrate

Answer: Option C

5. Washing soda is ?

sodium sulphite
sodium bicarbonate
sodiun carbonate
sodium biosulphite

Answer: Option C

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