Addition of hydrogen refers to _________.

Reduction refers to ________ .

Losing of electrons is _________.

Gaining of electrons is _________.

Formula of rust is ___________.

Complete the reaction at anode
2 fe —> 2 ___ + 4 e-

Rancidity in the food stuff is prevented by using ___________.

Tetravalent means valency is

Carbon is monovalent

There is 71% oxygen in environment

Carbon is the _____most abundant element present

Carbon is absent in amino acids

Dimond is an allotrope of silicon

The statement "carbon is everywhere" is

Unique ability of carbon atoms to form bond with itself is called ______

Hydrocarbon means carbon with

Saturated hydrocarbon has carbon‐carbon _____ bond

Alkene has C -C triple bond

The orbit of a planet is an ______ with the Sun at
one of the foci.

Acceleration due to gravity is denoted by __