The Rutherford atomic model of the atom is also known as the nuclear atomic model. According to this model- An atom consists of a heavy positively charged nucleus when protons and neutrons are present. The negatively charged electrons revolve around the nucleus in closed orbits with high speed. The electrons are generally referred to as planetary electrons. The whole atom is electrically neutral. The volume of an atom is 10¹⁵ times heavier than the volume of a nucleus.

* Graphite is an allotrope of carbon each atom is covalently bonded to other 3 atoms. These layer slide over each other easily because of the weak van der walls force between them.

* The sheets of carbon become bonded by weaker molecular forces so that layers of graphite can slide over each other.

Baking powder contains NaHCO3 and tartaric acid which react in presence of water to give CO2. Hence, option D is correct.
ADDITIONAL INFORMATION:
Baking powder is a cooking product that helps batter rise. This article discusses the effects of swallowing a large amount of baking powder. Baking powder is considered nontoxic when it is used in cooking and baking. However, serious complications can occur from overdoses or allergic reactions.

A mixture of two or more metals is called an alloy. The constituent elements of the alloy nichrome are nickel, iron, chromium, and manganese. Nichrome is an alloy of nickel. It is used for electrical heating elements.

The common alloying elements are- molybdenum, chromium, vanadium, nickel, manganese.

The strongest metal alloys are- tungsten, steel, titanium, iron, chromium, etc.

The process in which the extraction of impure metals into pure metals is the refining of metals. This method is used for the purification of volatile metals, which form vapours easily. Refining is to be distinguished from other processes such as smelting and calcining. The several different methods of refining are- Distillation, Liquation, Poling, Electrolysis, Zone refining, and Vapor Phase refining.