If a carbon atom is bonded to two hydrogen atoms and two carbon atoms, what type of bond must exist between the carbon atoms single double triple quadruple

If a carbon atom is bonded to two hydrogen atoms and two carbon atoms, the type of bond that must exist between carbon atoms is a single bond. Single bonded carbon atoms are called sigma bonds.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

plasma - state of matter made up of electrically charged particles