Name two gases which burn with a blue flame.
Carbon monoxide (CO) and Hydrogen (H2) gas burn with a blue flame.
Name the product formed when hydrogen burns in air with a pale blue flame.
Name an element that burns in air with a bright blue flame.
Name two gases that turn moist blue Litmus to red.
Only gases burn with a flame. But when you burn wood, it initially burns with a flame. Later, it only glows without a flame. Why?