The spark igniter will spark with or without the gas supply turned on. As long as the control is in the start position it will spark.
a complete flame or a blue flame
The Gas Stove uses a spark to start a flame, and that's what cooks the food.
Improper gas/air mixture.
Yes it emit
You turn the gas control knob, son.
Yes, because fire is a luminous body
yes!because fire is a luminous body
The color of the flame depends upon temperature. Please see this link.
Just cleen the burner of the stove, as it might be dirty.
if you have a refrigeration leak and freon is in the room it will be fiseine gas and is dangerous.
there is probably copper being burned somewhere on/in the stove copper is really the only thing that can turn a flame green
Certainly; you can see the light that it gives off.