1. The burning of coal is an example of a combination reaction (a combination).

2. When two or more elements combine to form a compound, it is called a combination reaction.

the uppermost layer of the skin is called the epidermis. It is the outermost layer of the skin and provides a protective barrier against environmental factors, pathogens, and moisture loss. The epidermis also contains cells responsible for producing melanin, the pigment that gives skin its color, and it constantly renews itself through a process called cell turnover.

1. The human shoulder joint is an example of a ball and socket joint.

2. In this type of joint, a rounded end of one bone fits into a flat or cup-shaped recess of the other bone.

Brahmos is a stealth supersonic cruise missile that can be launched from submarines, ships, aircraft or land. It is a joint venture between Republic of India’s Defence Research and Development Organisation (DRDO) and Russian Federation’s NPO Mashinostroeyenia. The name Brahmos is a portmanteau formed from the names of two rivers, The Brahmaputra of India and the Moskva of Russia.